DANE: move to mainline
[exim.git] / src / src / exim.c
CommitLineData
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1/*************************************************
2* Exim - an Internet mail transport agent *
3*************************************************/
4
f9ba5e22 5/* Copyright (c) University of Cambridge 1995 - 2018 */
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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
98913c8e 15#if defined(__GLIBC__) && !defined(__UCLIBC__)
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16# include <gnu/libc-version.h>
17#endif
18
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19#ifdef USE_GNUTLS
20# include <gnutls/gnutls.h>
21# if GNUTLS_VERSION_NUMBER < 0x030103 && !defined(DISABLE_OCSP)
22# define DISABLE_OCSP
23# endif
24#endif
25
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26extern void init_lookup_list(void);
27
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28
29
30/*************************************************
31* Function interface to store functions *
32*************************************************/
33
34/* We need some real functions to pass to the PCRE regular expression library
35for store allocation via Exim's store manager. The normal calls are actually
36macros that pass over location information to make tracing easier. These
37functions just interface to the standard macro calls. A good compiler will
38optimize out the tail recursion and so not make them too expensive. There
39are two sets of functions; one for use when we want to retain the compiled
40regular expression for a long time; the other for short-term use. */
41
42static void *
43function_store_get(size_t size)
44{
45return store_get((int)size);
46}
47
48static void
49function_dummy_free(void *block) { block = block; }
50
51static void *
52function_store_malloc(size_t size)
53{
54return store_malloc((int)size);
55}
56
57static void
58function_store_free(void *block)
59{
60store_free(block);
61}
62
63
64
65
66/*************************************************
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67* Enums for cmdline interface *
68*************************************************/
69
70enum commandline_info { CMDINFO_NONE=0,
36a3ae5f 71 CMDINFO_HELP, CMDINFO_SIEVE, CMDINFO_DSCP };
98a90c36
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72
73
74
75
76/*************************************************
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77* Compile regular expression and panic on fail *
78*************************************************/
79
80/* This function is called when failure to compile a regular expression leads
81to a panic exit. In other cases, pcre_compile() is called directly. In many
82cases where this function is used, the results of the compilation are to be
83placed in long-lived store, so we temporarily reset the store management
84functions that PCRE uses if the use_malloc flag is set.
85
86Argument:
87 pattern the pattern to compile
88 caseless TRUE if caseless matching is required
89 use_malloc TRUE if compile into malloc store
90
91Returns: pointer to the compiled pattern
92*/
93
94const pcre *
476be7e2 95regex_must_compile(const uschar *pattern, BOOL caseless, BOOL use_malloc)
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96{
97int offset;
98int options = PCRE_COPT;
99const pcre *yield;
100const uschar *error;
101if (use_malloc)
102 {
103 pcre_malloc = function_store_malloc;
104 pcre_free = function_store_free;
105 }
106if (caseless) options |= PCRE_CASELESS;
476be7e2 107yield = pcre_compile(CCS pattern, options, (const char **)&error, &offset, NULL);
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108pcre_malloc = function_store_get;
109pcre_free = function_dummy_free;
110if (yield == NULL)
111 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "regular expression error: "
112 "%s at offset %d while compiling %s", error, offset, pattern);
113return yield;
114}
115
116
117
118
119/*************************************************
120* Execute regular expression and set strings *
121*************************************************/
122
123/* This function runs a regular expression match, and sets up the pointers to
124the matched substrings.
125
126Arguments:
127 re the compiled expression
128 subject the subject string
129 options additional PCRE options
130 setup if < 0 do full setup
131 if >= 0 setup from setup+1 onwards,
132 excluding the full matched string
133
134Returns: TRUE or FALSE
135*/
136
137BOOL
1dc92d5a 138regex_match_and_setup(const pcre *re, const uschar *subject, int options, int setup)
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139{
140int ovector[3*(EXPAND_MAXN+1)];
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141uschar * s = string_copy(subject); /* de-constifying */
142int n = pcre_exec(re, NULL, CS s, Ustrlen(s), 0,
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143 PCRE_EOPT | options, ovector, sizeof(ovector)/sizeof(int));
144BOOL yield = n >= 0;
145if (n == 0) n = EXPAND_MAXN + 1;
146if (yield)
147 {
148 int nn;
149 expand_nmax = (setup < 0)? 0 : setup + 1;
150 for (nn = (setup < 0)? 0 : 2; nn < n*2; nn += 2)
151 {
1dc92d5a 152 expand_nstring[expand_nmax] = s + ovector[nn];
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153 expand_nlength[expand_nmax++] = ovector[nn+1] - ovector[nn];
154 }
155 expand_nmax--;
156 }
157return yield;
158}
159
160
161
162
163/*************************************************
921b12ca
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164* Set up processing details *
165*************************************************/
166
167/* Save a text string for dumping when SIGUSR1 is received.
168Do checks for overruns.
169
170Arguments: format and arguments, as for printf()
171Returns: nothing
172*/
173
174void
175set_process_info(const char *format, ...)
176{
92b0827a 177int len = sprintf(CS process_info, "%5d ", (int)getpid());
921b12ca 178va_list ap;
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TF
179va_start(ap, format);
180if (!string_vformat(process_info + len, PROCESS_INFO_SIZE - len - 2, format, ap))
181 Ustrcpy(process_info + len, "**** string overflowed buffer ****");
182len = Ustrlen(process_info);
183process_info[len+0] = '\n';
184process_info[len+1] = '\0';
185process_info_len = len + 1;
186DEBUG(D_process_info) debug_printf("set_process_info: %s", process_info);
187va_end(ap);
188}
189
190
191
192
193/*************************************************
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194* Handler for SIGUSR1 *
195*************************************************/
196
197/* SIGUSR1 causes any exim process to write to the process log details of
198what it is currently doing. It will only be used if the OS is capable of
199setting up a handler that causes automatic restarting of any system call
200that is in progress at the time.
201
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202This function takes care to be signal-safe.
203
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204Argument: the signal number (SIGUSR1)
205Returns: nothing
206*/
207
208static void
209usr1_handler(int sig)
210{
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211int fd;
212
213os_restarting_signal(sig, usr1_handler);
214
cab0c277 215if ((fd = Uopen(process_log_path, O_APPEND|O_WRONLY, LOG_MODE)) < 0)
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216 {
217 /* If we are already running as the Exim user, try to create it in the
218 current process (assuming spool_directory exists). Otherwise, if we are
219 root, do the creation in an exim:exim subprocess. */
220
221 int euid = geteuid();
222 if (euid == exim_uid)
223 fd = Uopen(process_log_path, O_CREAT|O_APPEND|O_WRONLY, LOG_MODE);
224 else if (euid == root_uid)
225 fd = log_create_as_exim(process_log_path);
226 }
227
228/* If we are neither exim nor root, or if we failed to create the log file,
229give up. There is not much useful we can do with errors, since we don't want
230to disrupt whatever is going on outside the signal handler. */
231
232if (fd < 0) return;
233
2f21487f 234(void)write(fd, process_info, process_info_len);
921b12ca 235(void)close(fd);
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236}
237
238
239
240/*************************************************
241* Timeout handler *
242*************************************************/
243
244/* This handler is enabled most of the time that Exim is running. The handler
245doesn't actually get used unless alarm() has been called to set a timer, to
246place a time limit on a system call of some kind. When the handler is run, it
247re-enables itself.
248
249There are some other SIGALRM handlers that are used in special cases when more
250than just a flag setting is required; for example, when reading a message's
251input. These are normally set up in the code module that uses them, and the
252SIGALRM handler is reset to this one afterwards.
253
254Argument: the signal value (SIGALRM)
255Returns: nothing
256*/
257
258void
259sigalrm_handler(int sig)
260{
261sig = sig; /* Keep picky compilers happy */
262sigalrm_seen = TRUE;
263os_non_restarting_signal(SIGALRM, sigalrm_handler);
264}
265
266
267
268/*************************************************
269* Sleep for a fractional time interval *
270*************************************************/
271
272/* This function is called by millisleep() and exim_wait_tick() to wait for a
273period of time that may include a fraction of a second. The coding is somewhat
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274tedious. We do not expect setitimer() ever to fail, but if it does, the process
275will wait for ever, so we panic in this instance. (There was a case of this
276when a bug in a function that calls milliwait() caused it to pass invalid data.
7086e875 277That's when I added the check. :-)
059ec3d9 278
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279We assume it to be not worth sleeping for under 100us; this value will
280require revisiting as hardware advances. This avoids the issue of
281a zero-valued timer setting meaning "never fire".
282
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283Argument: an itimerval structure containing the interval
284Returns: nothing
285*/
286
287static void
288milliwait(struct itimerval *itval)
289{
290sigset_t sigmask;
291sigset_t old_sigmask;
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292
293if (itval->it_value.tv_usec < 100 && itval->it_value.tv_sec == 0)
294 return;
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295(void)sigemptyset(&sigmask); /* Empty mask */
296(void)sigaddset(&sigmask, SIGALRM); /* Add SIGALRM */
297(void)sigprocmask(SIG_BLOCK, &sigmask, &old_sigmask); /* Block SIGALRM */
7086e875 298if (setitimer(ITIMER_REAL, itval, NULL) < 0) /* Start timer */
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299 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
300 "setitimer() failed: %s", strerror(errno));
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301(void)sigfillset(&sigmask); /* All signals */
302(void)sigdelset(&sigmask, SIGALRM); /* Remove SIGALRM */
303(void)sigsuspend(&sigmask); /* Until SIGALRM */
304(void)sigprocmask(SIG_SETMASK, &old_sigmask, NULL); /* Restore mask */
305}
306
307
308
309
310/*************************************************
311* Millisecond sleep function *
312*************************************************/
313
314/* The basic sleep() function has a granularity of 1 second, which is too rough
315in some cases - for example, when using an increasing delay to slow down
316spammers.
317
318Argument: number of millseconds
319Returns: nothing
320*/
321
322void
323millisleep(int msec)
324{
325struct itimerval itval;
326itval.it_interval.tv_sec = 0;
327itval.it_interval.tv_usec = 0;
328itval.it_value.tv_sec = msec/1000;
329itval.it_value.tv_usec = (msec % 1000) * 1000;
330milliwait(&itval);
331}
332
333
334
335/*************************************************
336* Compare microsecond times *
337*************************************************/
338
339/*
340Arguments:
341 tv1 the first time
342 tv2 the second time
343
344Returns: -1, 0, or +1
345*/
346
32dfdf8b 347static int
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348exim_tvcmp(struct timeval *t1, struct timeval *t2)
349{
350if (t1->tv_sec > t2->tv_sec) return +1;
351if (t1->tv_sec < t2->tv_sec) return -1;
352if (t1->tv_usec > t2->tv_usec) return +1;
353if (t1->tv_usec < t2->tv_usec) return -1;
354return 0;
355}
356
357
358
359
360/*************************************************
361* Clock tick wait function *
362*************************************************/
363
364/* Exim uses a time + a pid to generate a unique identifier in two places: its
365message IDs, and in file names for maildir deliveries. Because some OS now
366re-use pids within the same second, sub-second times are now being used.
4c04137d 367However, for absolute certainty, we must ensure the clock has ticked before
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368allowing the relevant process to complete. At the time of implementation of
369this code (February 2003), the speed of processors is such that the clock will
370invariably have ticked already by the time a process has done its job. This
371function prepares for the time when things are faster - and it also copes with
372clocks that go backwards.
373
374Arguments:
375 then_tv A timeval which was used to create uniqueness; its usec field
376 has been rounded down to the value of the resolution.
377 We want to be sure the current time is greater than this.
378 resolution The resolution that was used to divide the microseconds
379 (1 for maildir, larger for message ids)
380
381Returns: nothing
382*/
383
384void
385exim_wait_tick(struct timeval *then_tv, int resolution)
386{
387struct timeval now_tv;
388long int now_true_usec;
389
390(void)gettimeofday(&now_tv, NULL);
391now_true_usec = now_tv.tv_usec;
392now_tv.tv_usec = (now_true_usec/resolution) * resolution;
393
394if (exim_tvcmp(&now_tv, then_tv) <= 0)
395 {
396 struct itimerval itval;
397 itval.it_interval.tv_sec = 0;
398 itval.it_interval.tv_usec = 0;
399 itval.it_value.tv_sec = then_tv->tv_sec - now_tv.tv_sec;
400 itval.it_value.tv_usec = then_tv->tv_usec + resolution - now_true_usec;
401
402 /* We know that, overall, "now" is less than or equal to "then". Therefore, a
403 negative value for the microseconds is possible only in the case when "now"
404 is more than a second less than "then". That means that itval.it_value.tv_sec
405 is greater than zero. The following correction is therefore safe. */
406
407 if (itval.it_value.tv_usec < 0)
408 {
409 itval.it_value.tv_usec += 1000000;
410 itval.it_value.tv_sec -= 1;
411 }
412
413 DEBUG(D_transport|D_receive)
414 {
415 if (!running_in_test_harness)
416 {
d0291a0a 417 debug_printf("tick check: " TIME_T_FMT ".%06lu " TIME_T_FMT ".%06lu\n",
7437665e
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418 then_tv->tv_sec, (long) then_tv->tv_usec,
419 now_tv.tv_sec, (long) now_tv.tv_usec);
d0291a0a
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420 debug_printf("waiting " TIME_T_FMT ".%06lu\n",
421 itval.it_value.tv_sec, (long) itval.it_value.tv_usec);
059ec3d9
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422 }
423 }
424
425 milliwait(&itval);
426 }
427}
428
429
430
431
432/*************************************************
2632889e
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433* Call fopen() with umask 777 and adjust mode *
434*************************************************/
435
436/* Exim runs with umask(0) so that files created with open() have the mode that
437is specified in the open() call. However, there are some files, typically in
438the spool directory, that are created with fopen(). They end up world-writeable
439if no precautions are taken. Although the spool directory is not accessible to
440the world, this is an untidiness. So this is a wrapper function for fopen()
441that sorts out the mode of the created file.
442
443Arguments:
444 filename the file name
445 options the fopen() options
446 mode the required mode
447
448Returns: the fopened FILE or NULL
449*/
450
451FILE *
1ba28e2b 452modefopen(const uschar *filename, const char *options, mode_t mode)
2632889e 453{
67d175de
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454mode_t saved_umask = umask(0777);
455FILE *f = Ufopen(filename, options);
456(void)umask(saved_umask);
2632889e
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457if (f != NULL) (void)fchmod(fileno(f), mode);
458return f;
459}
460
461
462
463
464/*************************************************
059ec3d9
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465* Ensure stdin, stdout, and stderr exist *
466*************************************************/
467
468/* Some operating systems grumble if an exec() happens without a standard
469input, output, and error (fds 0, 1, 2) being defined. The worry is that some
470file will be opened and will use these fd values, and then some other bit of
471code will assume, for example, that it can write error messages to stderr.
472This function ensures that fds 0, 1, and 2 are open if they do not already
473exist, by connecting them to /dev/null.
474
475This function is also used to ensure that std{in,out,err} exist at all times,
476so that if any library that Exim calls tries to use them, it doesn't crash.
477
478Arguments: None
479Returns: Nothing
480*/
481
482void
483exim_nullstd(void)
484{
485int i;
486int devnull = -1;
487struct stat statbuf;
488for (i = 0; i <= 2; i++)
489 {
490 if (fstat(i, &statbuf) < 0 && errno == EBADF)
491 {
492 if (devnull < 0) devnull = open("/dev/null", O_RDWR);
493 if (devnull < 0) log_write(0, LOG_MAIN|LOG_PANIC_DIE, "%s",
494 string_open_failed(errno, "/dev/null"));
1fe64dcc 495 if (devnull != i) (void)dup2(devnull, i);
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496 }
497 }
1fe64dcc 498if (devnull > 2) (void)close(devnull);
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499}
500
501
502
503
504/*************************************************
505* Close unwanted file descriptors for delivery *
506*************************************************/
507
508/* This function is called from a new process that has been forked to deliver
509an incoming message, either directly, or using exec.
510
511We want any smtp input streams to be closed in this new process. However, it
512has been observed that using fclose() here causes trouble. When reading in -bS
513input, duplicate copies of messages have been seen. The files will be sharing a
514file pointer with the parent process, and it seems that fclose() (at least on
515some systems - I saw this on Solaris 2.5.1) messes with that file pointer, at
516least sometimes. Hence we go for closing the underlying file descriptors.
517
518If TLS is active, we want to shut down the TLS library, but without molesting
519the parent's SSL connection.
520
521For delivery of a non-SMTP message, we want to close stdin and stdout (and
522stderr unless debugging) because the calling process might have set them up as
523pipes and be waiting for them to close before it waits for the submission
524process to terminate. If they aren't closed, they hold up the calling process
525until the initial delivery process finishes, which is not what we want.
526
527Exception: We do want it for synchronous delivery!
528
529And notwithstanding all the above, if D_resolver is set, implying resolver
530debugging, leave stdout open, because that's where the resolver writes its
531debugging output.
532
533When we close stderr (which implies we've also closed stdout), we also get rid
534of any controlling terminal.
535
536Arguments: None
537Returns: Nothing
538*/
539
540static void
541close_unwanted(void)
542{
543if (smtp_input)
544 {
545 #ifdef SUPPORT_TLS
a400eccf 546 tls_close(TRUE, FALSE); /* Shut down the TLS library */
059ec3d9 547 #endif
1fe64dcc
PH
548 (void)close(fileno(smtp_in));
549 (void)close(fileno(smtp_out));
059ec3d9
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550 smtp_in = NULL;
551 }
552else
553 {
1fe64dcc
PH
554 (void)close(0); /* stdin */
555 if ((debug_selector & D_resolver) == 0) (void)close(1); /* stdout */
556 if (debug_selector == 0) /* stderr */
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557 {
558 if (!synchronous_delivery)
559 {
1fe64dcc 560 (void)close(2);
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561 log_stderr = NULL;
562 }
563 (void)setsid();
564 }
565 }
566}
567
568
569
570
571/*************************************************
572* Set uid and gid *
573*************************************************/
574
575/* This function sets a new uid and gid permanently, optionally calling
576initgroups() to set auxiliary groups. There are some special cases when running
577Exim in unprivileged modes. In these situations the effective uid will not be
578root; if we already have the right effective uid/gid, and don't need to
579initialize any groups, leave things as they are.
580
581Arguments:
582 uid the uid
583 gid the gid
584 igflag TRUE if initgroups() wanted
585 msg text to use in debugging output and failure log
586
587Returns: nothing; bombs out on failure
588*/
589
590void
591exim_setugid(uid_t uid, gid_t gid, BOOL igflag, uschar *msg)
592{
593uid_t euid = geteuid();
594gid_t egid = getegid();
595
596if (euid == root_uid || euid != uid || egid != gid || igflag)
597 {
598 /* At least one OS returns +1 for initgroups failure, so just check for
599 non-zero. */
600
601 if (igflag)
602 {
603 struct passwd *pw = getpwuid(uid);
604 if (pw != NULL)
605 {
606 if (initgroups(pw->pw_name, gid) != 0)
607 log_write(0,LOG_MAIN|LOG_PANIC_DIE,"initgroups failed for uid=%ld: %s",
608 (long int)uid, strerror(errno));
609 }
610 else log_write(0, LOG_MAIN|LOG_PANIC_DIE, "cannot run initgroups(): "
611 "no passwd entry for uid=%ld", (long int)uid);
612 }
613
614 if (setgid(gid) < 0 || setuid(uid) < 0)
615 {
616 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "unable to set gid=%ld or uid=%ld "
617 "(euid=%ld): %s", (long int)gid, (long int)uid, (long int)euid, msg);
618 }
619 }
620
621/* Debugging output included uid/gid and all groups */
622
623DEBUG(D_uid)
624 {
cd59ab18 625 int group_count, save_errno;
059ec3d9
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626 gid_t group_list[NGROUPS_MAX];
627 debug_printf("changed uid/gid: %s\n uid=%ld gid=%ld pid=%ld\n", msg,
628 (long int)geteuid(), (long int)getegid(), (long int)getpid());
629 group_count = getgroups(NGROUPS_MAX, group_list);
cd59ab18 630 save_errno = errno;
059ec3d9
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631 debug_printf(" auxiliary group list:");
632 if (group_count > 0)
633 {
634 int i;
635 for (i = 0; i < group_count; i++) debug_printf(" %d", (int)group_list[i]);
636 }
cd59ab18
PP
637 else if (group_count < 0)
638 debug_printf(" <error: %s>", strerror(save_errno));
059ec3d9
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639 else debug_printf(" <none>");
640 debug_printf("\n");
641 }
642}
643
644
645
646
647/*************************************************
648* Exit point *
649*************************************************/
650
651/* Exim exits via this function so that it always clears up any open
652databases.
653
654Arguments:
655 rc return code
656
657Returns: does not return
658*/
659
660void
9bfb7e1b 661exim_exit(int rc, const uschar * process)
059ec3d9
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662{
663search_tidyup();
664DEBUG(D_any)
9bfb7e1b
JH
665 debug_printf(">>>>>>>>>>>>>>>> Exim pid=%d %s%s%sterminating with rc=%d "
666 ">>>>>>>>>>>>>>>>\n", (int)getpid(),
667 process ? "(" : "", process, process ? ") " : "", rc);
059ec3d9
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668exit(rc);
669}
670
671
672
673
674/*************************************************
675* Extract port from host address *
676*************************************************/
677
678/* Called to extract the port from the values given to -oMa and -oMi.
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679It also checks the syntax of the address, and terminates it before the
680port data when a port is extracted.
059ec3d9
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681
682Argument:
683 address the address, with possible port on the end
684
685Returns: the port, or zero if there isn't one
686 bombs out on a syntax error
687*/
688
689static int
690check_port(uschar *address)
691{
7cd1141b 692int port = host_address_extract_port(address);
8e669ac1 693if (string_is_ip_address(address, NULL) == 0)
059ec3d9
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694 {
695 fprintf(stderr, "exim abandoned: \"%s\" is not an IP address\n", address);
696 exit(EXIT_FAILURE);
697 }
698return port;
699}
700
701
702
703/*************************************************
704* Test/verify an address *
705*************************************************/
706
707/* This function is called by the -bv and -bt code. It extracts a working
708address from a full RFC 822 address. This isn't really necessary per se, but it
709has the effect of collapsing source routes.
710
711Arguments:
712 s the address string
713 flags flag bits for verify_address()
714 exit_value to be set for failures
715
a5a28604 716Returns: nothing
059ec3d9
PH
717*/
718
719static void
720test_address(uschar *s, int flags, int *exit_value)
721{
722int start, end, domain;
723uschar *parse_error = NULL;
724uschar *address = parse_extract_address(s, &parse_error, &start, &end, &domain,
725 FALSE);
726if (address == NULL)
727 {
728 fprintf(stdout, "syntax error: %s\n", parse_error);
729 *exit_value = 2;
730 }
731else
732 {
733 int rc = verify_address(deliver_make_addr(address,TRUE), stdout, flags, -1,
4deaf07d 734 -1, -1, NULL, NULL, NULL);
059ec3d9
PH
735 if (rc == FAIL) *exit_value = 2;
736 else if (rc == DEFER && *exit_value == 0) *exit_value = 1;
737 }
738}
739
740
741
742/*************************************************
059ec3d9
PH
743* Show supported features *
744*************************************************/
745
059ec3d9 746static void
96508de1 747show_db_version(FILE * f)
059ec3d9
PH
748{
749#ifdef DB_VERSION_STRING
96508de1
JH
750DEBUG(D_any)
751 {
752 fprintf(f, "Library version: BDB: Compile: %s\n", DB_VERSION_STRING);
753 fprintf(f, " Runtime: %s\n",
754 db_version(NULL, NULL, NULL));
755 }
756else
757 fprintf(f, "Berkeley DB: %s\n", DB_VERSION_STRING);
758
059ec3d9
PH
759#elif defined(BTREEVERSION) && defined(HASHVERSION)
760 #ifdef USE_DB
761 fprintf(f, "Probably Berkeley DB version 1.8x (native mode)\n");
762 #else
763 fprintf(f, "Probably Berkeley DB version 1.8x (compatibility mode)\n");
764 #endif
96508de1 765
059ec3d9
PH
766#elif defined(_DBM_RDONLY) || defined(dbm_dirfno)
767fprintf(f, "Probably ndbm\n");
768#elif defined(USE_TDB)
769fprintf(f, "Using tdb\n");
770#else
771 #ifdef USE_GDBM
772 fprintf(f, "Probably GDBM (native mode)\n");
773 #else
774 fprintf(f, "Probably GDBM (compatibility mode)\n");
775 #endif
776#endif
96508de1
JH
777}
778
779
780/* This function is called for -bV/--version and for -d to output the optional
781features of the current Exim binary.
782
783Arguments: a FILE for printing
784Returns: nothing
785*/
786
787static void
788show_whats_supported(FILE * f)
789{
790auth_info * authi;
791
792DEBUG(D_any) {} else show_db_version(f);
059ec3d9
PH
793
794fprintf(f, "Support for:");
9cec981f
PH
795#ifdef SUPPORT_CRYPTEQ
796 fprintf(f, " crypteq");
797#endif
059ec3d9
PH
798#if HAVE_ICONV
799 fprintf(f, " iconv()");
800#endif
801#if HAVE_IPV6
802 fprintf(f, " IPv6");
803#endif
79378e0f
PH
804#ifdef HAVE_SETCLASSRESOURCES
805 fprintf(f, " use_setclassresources");
929ba01c 806#endif
059ec3d9
PH
807#ifdef SUPPORT_PAM
808 fprintf(f, " PAM");
809#endif
810#ifdef EXIM_PERL
811 fprintf(f, " Perl");
812#endif
1a46a8c5
PH
813#ifdef EXPAND_DLFUNC
814 fprintf(f, " Expand_dlfunc");
815#endif
059ec3d9
PH
816#ifdef USE_TCP_WRAPPERS
817 fprintf(f, " TCPwrappers");
818#endif
819#ifdef SUPPORT_TLS
c11d665d 820# ifdef USE_GNUTLS
059ec3d9 821 fprintf(f, " GnuTLS");
c11d665d 822# else
059ec3d9 823 fprintf(f, " OpenSSL");
c11d665d 824# endif
059ec3d9 825#endif
b2f5a032
PH
826#ifdef SUPPORT_TRANSLATE_IP_ADDRESS
827 fprintf(f, " translate_ip_address");
828#endif
f174f16e
PH
829#ifdef SUPPORT_MOVE_FROZEN_MESSAGES
830 fprintf(f, " move_frozen_messages");
831#endif
8523533c
TK
832#ifdef WITH_CONTENT_SCAN
833 fprintf(f, " Content_Scanning");
834#endif
c0635b6d
JH
835#ifdef SUPPORT_DANE
836 fprintf(f, " DANE");
837#endif
74f150bf
JH
838#ifndef DISABLE_DKIM
839 fprintf(f, " DKIM");
840#endif
ef1bbb27
HSHR
841#ifndef DISABLE_DNSSEC
842 fprintf(f, " DNSSEC");
843#endif
0cbf2b82
JH
844#ifndef DISABLE_EVENT
845 fprintf(f, " Event");
846#endif
8c5d388a
JH
847#ifdef SUPPORT_I18N
848 fprintf(f, " I18N");
849#endif
74f150bf
JH
850#ifndef DISABLE_OCSP
851 fprintf(f, " OCSP");
852#endif
4d832da1
TL
853#ifndef DISABLE_PRDR
854 fprintf(f, " PRDR");
855#endif
cee5f132
JH
856#ifdef SUPPORT_PROXY
857 fprintf(f, " PROXY");
858#endif
f0989ec0 859#ifdef SUPPORT_SOCKS
74f150bf 860 fprintf(f, " SOCKS");
f2de3a33 861#endif
7952eef9
JH
862#ifdef SUPPORT_SPF
863 fprintf(f, " SPF");
864#endif
1a2dfad5 865#ifdef TCP_FASTOPEN
10ac8d7f
JH
866 deliver_init();
867 if (tcp_fastopen_ok) fprintf(f, " TCP_Fast_Open");
1a2dfad5 868#endif
5bde3efa
ACK
869#ifdef EXPERIMENTAL_LMDB
870 fprintf(f, " Experimental_LMDB");
871#endif
3369a853
ACK
872#ifdef EXPERIMENTAL_QUEUEFILE
873 fprintf(f, " Experimental_QUEUEFILE");
874#endif
8523533c
TK
875#ifdef EXPERIMENTAL_SRS
876 fprintf(f, " Experimental_SRS");
877#endif
878#ifdef EXPERIMENTAL_BRIGHTMAIL
879 fprintf(f, " Experimental_Brightmail");
880#endif
6a8f9482
TK
881#ifdef EXPERIMENTAL_DCC
882 fprintf(f, " Experimental_DCC");
883#endif
4840604e
TL
884#ifdef EXPERIMENTAL_DMARC
885 fprintf(f, " Experimental_DMARC");
886#endif
895fbaf2
JH
887#ifdef EXPERIMENTAL_DSN_INFO
888 fprintf(f, " Experimental_DSN_info");
889#endif
059ec3d9
PH
890fprintf(f, "\n");
891
e6d225ae
DW
892fprintf(f, "Lookups (built-in):");
893#if defined(LOOKUP_LSEARCH) && LOOKUP_LSEARCH!=2
059ec3d9
PH
894 fprintf(f, " lsearch wildlsearch nwildlsearch iplsearch");
895#endif
e6d225ae 896#if defined(LOOKUP_CDB) && LOOKUP_CDB!=2
059ec3d9
PH
897 fprintf(f, " cdb");
898#endif
e6d225ae 899#if defined(LOOKUP_DBM) && LOOKUP_DBM!=2
4a6a987a 900 fprintf(f, " dbm dbmjz dbmnz");
059ec3d9 901#endif
e6d225ae 902#if defined(LOOKUP_DNSDB) && LOOKUP_DNSDB!=2
059ec3d9
PH
903 fprintf(f, " dnsdb");
904#endif
e6d225ae 905#if defined(LOOKUP_DSEARCH) && LOOKUP_DSEARCH!=2
059ec3d9
PH
906 fprintf(f, " dsearch");
907#endif
e6d225ae 908#if defined(LOOKUP_IBASE) && LOOKUP_IBASE!=2
059ec3d9
PH
909 fprintf(f, " ibase");
910#endif
e6d225ae 911#if defined(LOOKUP_LDAP) && LOOKUP_LDAP!=2
059ec3d9
PH
912 fprintf(f, " ldap ldapdn ldapm");
913#endif
5bde3efa
ACK
914#ifdef EXPERIMENTAL_LMDB
915 fprintf(f, " lmdb");
916#endif
e6d225ae 917#if defined(LOOKUP_MYSQL) && LOOKUP_MYSQL!=2
059ec3d9
PH
918 fprintf(f, " mysql");
919#endif
e6d225ae 920#if defined(LOOKUP_NIS) && LOOKUP_NIS!=2
059ec3d9
PH
921 fprintf(f, " nis nis0");
922#endif
e6d225ae 923#if defined(LOOKUP_NISPLUS) && LOOKUP_NISPLUS!=2
059ec3d9
PH
924 fprintf(f, " nisplus");
925#endif
e6d225ae 926#if defined(LOOKUP_ORACLE) && LOOKUP_ORACLE!=2
059ec3d9
PH
927 fprintf(f, " oracle");
928#endif
e6d225ae 929#if defined(LOOKUP_PASSWD) && LOOKUP_PASSWD!=2
059ec3d9
PH
930 fprintf(f, " passwd");
931#endif
e6d225ae 932#if defined(LOOKUP_PGSQL) && LOOKUP_PGSQL!=2
059ec3d9
PH
933 fprintf(f, " pgsql");
934#endif
de78e2d5
JH
935#if defined(LOOKUP_REDIS) && LOOKUP_REDIS!=2
936 fprintf(f, " redis");
937#endif
e6d225ae 938#if defined(LOOKUP_SQLITE) && LOOKUP_SQLITE!=2
13b685f9
PH
939 fprintf(f, " sqlite");
940#endif
e6d225ae 941#if defined(LOOKUP_TESTDB) && LOOKUP_TESTDB!=2
059ec3d9
PH
942 fprintf(f, " testdb");
943#endif
e6d225ae 944#if defined(LOOKUP_WHOSON) && LOOKUP_WHOSON!=2
059ec3d9
PH
945 fprintf(f, " whoson");
946#endif
947fprintf(f, "\n");
948
adf73d37
JH
949auth_show_supported(f);
950route_show_supported(f);
951transport_show_supported(f);
059ec3d9 952
c11d665d
JH
953#ifdef WITH_CONTENT_SCAN
954malware_show_supported(f);
955#endif
956
059ec3d9
PH
957if (fixed_never_users[0] > 0)
958 {
959 int i;
960 fprintf(f, "Fixed never_users: ");
961 for (i = 1; i <= (int)fixed_never_users[0] - 1; i++)
962 fprintf(f, "%d:", (unsigned int)fixed_never_users[i]);
963 fprintf(f, "%d\n", (unsigned int)fixed_never_users[i]);
964 }
21c28500 965
19bfe9e7
HSHR
966fprintf(f, "Configure owner: %d:%d\n", config_uid, config_gid);
967
73a46702 968fprintf(f, "Size of off_t: " SIZE_T_FMT "\n", sizeof(off_t));
36f12725 969
6545de78
PP
970/* Everything else is details which are only worth reporting when debugging.
971Perhaps the tls_version_report should move into this too. */
972DEBUG(D_any) do {
973
974 int i;
975
b3c261f7
PP
976/* clang defines __GNUC__ (at least, for me) so test for it first */
977#if defined(__clang__)
978 fprintf(f, "Compiler: CLang [%s]\n", __clang_version__);
979#elif defined(__GNUC__)
980 fprintf(f, "Compiler: GCC [%s]\n",
981# ifdef __VERSION__
982 __VERSION__
983# else
984 "? unknown version ?"
985# endif
986 );
987#else
988 fprintf(f, "Compiler: <unknown>\n");
989#endif
990
98913c8e 991#if defined(__GLIBC__) && !defined(__UCLIBC__)
01f3091a
JH
992 fprintf(f, "Library version: Glibc: Compile: %d.%d\n",
993 __GLIBC__, __GLIBC_MINOR__);
994 if (__GLIBC_PREREQ(2, 1))
995 fprintf(f, " Runtime: %s\n",
996 gnu_get_libc_version());
997#endif
998
96508de1
JH
999show_db_version(f);
1000
754a0503
PP
1001#ifdef SUPPORT_TLS
1002 tls_version_report(f);
1003#endif
8c5d388a 1004#ifdef SUPPORT_I18N
b04be5e7
JH
1005 utf8_version_report(f);
1006#endif
754a0503 1007
fc362fc5
JH
1008 for (authi = auths_available; *authi->driver_name != '\0'; ++authi)
1009 if (authi->version_report)
44bbabb5 1010 (*authi->version_report)(f);
6545de78 1011
decd95cb 1012 /* PCRE_PRERELEASE is either defined and empty or a bare sequence of
6475bd82
PP
1013 characters; unless it's an ancient version of PCRE in which case it
1014 is not defined. */
1015#ifndef PCRE_PRERELEASE
01f3091a 1016# define PCRE_PRERELEASE
6475bd82
PP
1017#endif
1018#define QUOTE(X) #X
1019#define EXPAND_AND_QUOTE(X) QUOTE(X)
6545de78
PP
1020 fprintf(f, "Library version: PCRE: Compile: %d.%d%s\n"
1021 " Runtime: %s\n",
1022 PCRE_MAJOR, PCRE_MINOR,
6475bd82 1023 EXPAND_AND_QUOTE(PCRE_PRERELEASE) "",
6545de78 1024 pcre_version());
6475bd82
PP
1025#undef QUOTE
1026#undef EXPAND_AND_QUOTE
6545de78
PP
1027
1028 init_lookup_list();
1029 for (i = 0; i < lookup_list_count; i++)
6545de78
PP
1030 if (lookup_list[i]->version_report)
1031 lookup_list[i]->version_report(f);
6545de78 1032
b70d2586
PP
1033#ifdef WHITELIST_D_MACROS
1034 fprintf(f, "WHITELIST_D_MACROS: \"%s\"\n", WHITELIST_D_MACROS);
1035#else
1036 fprintf(f, "WHITELIST_D_MACROS unset\n");
1037#endif
1038#ifdef TRUSTED_CONFIG_LIST
1039 fprintf(f, "TRUSTED_CONFIG_LIST: \"%s\"\n", TRUSTED_CONFIG_LIST);
1040#else
1041 fprintf(f, "TRUSTED_CONFIG_LIST unset\n");
1042#endif
1043
6545de78 1044} while (0);
059ec3d9
PH
1045}
1046
1047
98a90c36
PP
1048/*************************************************
1049* Show auxiliary information about Exim *
1050*************************************************/
1051
1052static void
1053show_exim_information(enum commandline_info request, FILE *stream)
1054{
1055const uschar **pp;
1056
1057switch(request)
1058 {
1059 case CMDINFO_NONE:
1060 fprintf(stream, "Oops, something went wrong.\n");
1061 return;
1062 case CMDINFO_HELP:
1063 fprintf(stream,
1064"The -bI: flag takes a string indicating which information to provide.\n"
1065"If the string is not recognised, you'll get this help (on stderr).\n"
1066"\n"
1067" exim -bI:help this information\n"
030caf2a
JS
1068" exim -bI:dscp list of known dscp value keywords\n"
1069" exim -bI:sieve list of supported sieve extensions\n"
98a90c36
PP
1070);
1071 return;
1072 case CMDINFO_SIEVE:
1073 for (pp = exim_sieve_extension_list; *pp; ++pp)
1074 fprintf(stream, "%s\n", *pp);
1075 return;
36a3ae5f
PP
1076 case CMDINFO_DSCP:
1077 dscp_list_to_stream(stream);
1078 return;
98a90c36
PP
1079 }
1080}
059ec3d9
PH
1081
1082
1083/*************************************************
1084* Quote a local part *
1085*************************************************/
1086
1087/* This function is used when a sender address or a From: or Sender: header
1088line is being created from the caller's login, or from an authenticated_id. It
1089applies appropriate quoting rules for a local part.
1090
1091Argument: the local part
1092Returns: the local part, quoted if necessary
1093*/
1094
1095uschar *
1096local_part_quote(uschar *lpart)
1097{
1098BOOL needs_quote = FALSE;
acec9514 1099gstring * g;
059ec3d9
PH
1100uschar *t;
1101
1102for (t = lpart; !needs_quote && *t != 0; t++)
1103 {
1104 needs_quote = !isalnum(*t) && strchr("!#$%&'*+-/=?^_`{|}~", *t) == NULL &&
1105 (*t != '.' || t == lpart || t[1] == 0);
1106 }
1107
1108if (!needs_quote) return lpart;
1109
acec9514 1110g = string_catn(NULL, US"\"", 1);
059ec3d9
PH
1111
1112for (;;)
1113 {
1114 uschar *nq = US Ustrpbrk(lpart, "\\\"");
1115 if (nq == NULL)
1116 {
acec9514 1117 g = string_cat(g, lpart);
059ec3d9
PH
1118 break;
1119 }
acec9514
JH
1120 g = string_catn(g, lpart, nq - lpart);
1121 g = string_catn(g, US"\\", 1);
1122 g = string_catn(g, nq, 1);
059ec3d9
PH
1123 lpart = nq + 1;
1124 }
1125
acec9514
JH
1126g = string_catn(g, US"\"", 1);
1127return string_from_gstring(g);
059ec3d9
PH
1128}
1129
1130
1131
1132#ifdef USE_READLINE
1133/*************************************************
1134* Load readline() functions *
1135*************************************************/
1136
1137/* This function is called from testing executions that read data from stdin,
1138but only when running as the calling user. Currently, only -be does this. The
1139function loads the readline() function library and passes back the functions.
1140On some systems, it needs the curses library, so load that too, but try without
1141it if loading fails. All this functionality has to be requested at build time.
1142
1143Arguments:
1144 fn_readline_ptr pointer to where to put the readline pointer
1145 fn_addhist_ptr pointer to where to put the addhistory function
1146
1147Returns: the dlopen handle or NULL on failure
1148*/
1149
1150static void *
1ba28e2b
PP
1151set_readline(char * (**fn_readline_ptr)(const char *),
1152 void (**fn_addhist_ptr)(const char *))
059ec3d9
PH
1153{
1154void *dlhandle;
e12f8c32 1155void *dlhandle_curses = dlopen("libcurses." DYNLIB_FN_EXT, RTLD_GLOBAL|RTLD_LAZY);
059ec3d9 1156
e12f8c32 1157dlhandle = dlopen("libreadline." DYNLIB_FN_EXT, RTLD_GLOBAL|RTLD_NOW);
059ec3d9
PH
1158if (dlhandle_curses != NULL) dlclose(dlhandle_curses);
1159
1160if (dlhandle != NULL)
1161 {
1ba28e2b
PP
1162 /* Checked manual pages; at least in GNU Readline 6.1, the prototypes are:
1163 * char * readline (const char *prompt);
1164 * void add_history (const char *string);
1165 */
1166 *fn_readline_ptr = (char *(*)(const char*))dlsym(dlhandle, "readline");
1167 *fn_addhist_ptr = (void(*)(const char*))dlsym(dlhandle, "add_history");
059ec3d9
PH
1168 }
1169else
1170 {
1171 DEBUG(D_any) debug_printf("failed to load readline: %s\n", dlerror());
1172 }
1173
1174return dlhandle;
1175}
1176#endif
1177
1178
1179
1180/*************************************************
1181* Get a line from stdin for testing things *
1182*************************************************/
1183
1184/* This function is called when running tests that can take a number of lines
1185of input (for example, -be and -bt). It handles continuations and trailing
1186spaces. And prompting and a blank line output on eof. If readline() is in use,
1187the arguments are non-NULL and provide the relevant functions.
1188
1189Arguments:
1190 fn_readline readline function or NULL
1191 fn_addhist addhist function or NULL
1192
1193Returns: pointer to dynamic memory, or NULL at end of file
1194*/
1195
1196static uschar *
1ba28e2b 1197get_stdinput(char *(*fn_readline)(const char *), void(*fn_addhist)(const char *))
059ec3d9
PH
1198{
1199int i;
acec9514 1200gstring * g = NULL;
059ec3d9 1201
acec9514 1202if (!fn_readline) { printf("> "); fflush(stdout); }
059ec3d9
PH
1203
1204for (i = 0;; i++)
1205 {
1206 uschar buffer[1024];
1207 uschar *p, *ss;
1208
1209 #ifdef USE_READLINE
1210 char *readline_line = NULL;
1211 if (fn_readline != NULL)
1212 {
1213 if ((readline_line = fn_readline((i > 0)? "":"> ")) == NULL) break;
1214 if (*readline_line != 0 && fn_addhist != NULL) fn_addhist(readline_line);
1215 p = US readline_line;
1216 }
1217 else
1218 #endif
1219
1220 /* readline() not in use */
1221
1222 {
1223 if (Ufgets(buffer, sizeof(buffer), stdin) == NULL) break;
1224 p = buffer;
1225 }
1226
1227 /* Handle the line */
1228
1229 ss = p + (int)Ustrlen(p);
1230 while (ss > p && isspace(ss[-1])) ss--;
1231
1232 if (i > 0)
1233 {
1234 while (p < ss && isspace(*p)) p++; /* leading space after cont */
1235 }
1236
acec9514 1237 g = string_catn(g, p, ss - p);
059ec3d9
PH
1238
1239 #ifdef USE_READLINE
acec9514 1240 if (fn_readline) free(readline_line);
059ec3d9
PH
1241 #endif
1242
acec9514
JH
1243 /* g can only be NULL if ss==p */
1244 if (ss == p || g->s[g->ptr-1] != '\\')
059ec3d9 1245 break;
acec9514
JH
1246
1247 --g->ptr;
1248 (void) string_from_gstring(g);
059ec3d9
PH
1249 }
1250
acec9514
JH
1251if (!g) printf("\n");
1252return string_from_gstring(g);
059ec3d9
PH
1253}
1254
1255
1256
1257/*************************************************
81ea09ca
NM
1258* Output usage information for the program *
1259*************************************************/
1260
1261/* This function is called when there are no recipients
1262 or a specific --help argument was added.
1263
1264Arguments:
1265 progname information on what name we were called by
1266
1267Returns: DOES NOT RETURN
1268*/
1269
1270static void
1271exim_usage(uschar *progname)
1272{
1273
4c04137d 1274/* Handle specific program invocation variants */
81ea09ca
NM
1275if (Ustrcmp(progname, US"-mailq") == 0)
1276 {
1277 fprintf(stderr,
e765a0f1 1278 "mailq - list the contents of the mail queue\n\n"
81ea09ca
NM
1279 "For a list of options, see the Exim documentation.\n");
1280 exit(EXIT_FAILURE);
1281 }
1282
1283/* Generic usage - we output this whatever happens */
1284fprintf(stderr,
1285 "Exim is a Mail Transfer Agent. It is normally called by Mail User Agents,\n"
1286 "not directly from a shell command line. Options and/or arguments control\n"
1287 "what it does when called. For a list of options, see the Exim documentation.\n");
1288
1289exit(EXIT_FAILURE);
1290}
1291
1292
1293
1294/*************************************************
a7cbbf50
PP
1295* Validate that the macros given are okay *
1296*************************************************/
1297
1298/* Typically, Exim will drop privileges if macros are supplied. In some
1299cases, we want to not do so.
1300
a4034eb8 1301Arguments: opt_D_used - true if the commandline had a "-D" option
a7cbbf50
PP
1302Returns: true if trusted, false otherwise
1303*/
1304
1305static BOOL
a4034eb8 1306macros_trusted(BOOL opt_D_used)
a7cbbf50
PP
1307{
1308#ifdef WHITELIST_D_MACROS
1309macro_item *m;
1a7c9a48 1310uschar *whitelisted, *end, *p, **whites, **w;
a7cbbf50
PP
1311int white_count, i, n;
1312size_t len;
1313BOOL prev_char_item, found;
1314#endif
1315
a4034eb8 1316if (!opt_D_used)
a7cbbf50
PP
1317 return TRUE;
1318#ifndef WHITELIST_D_MACROS
1319return FALSE;
1320#else
1321
66581d1e
PP
1322/* We only trust -D overrides for some invoking users:
1323root, the exim run-time user, the optional config owner user.
1324I don't know why config-owner would be needed, but since they can own the
1325config files anyway, there's no security risk to letting them override -D. */
1326if ( ! ((real_uid == root_uid)
1327 || (real_uid == exim_uid)
1328#ifdef CONFIGURE_OWNER
1329 || (real_uid == config_uid)
1330#endif
1331 ))
1332 {
1333 debug_printf("macros_trusted rejecting macros for uid %d\n", (int) real_uid);
1334 return FALSE;
1335 }
1336
a7cbbf50
PP
1337/* Get a list of macros which are whitelisted */
1338whitelisted = string_copy_malloc(US WHITELIST_D_MACROS);
1339prev_char_item = FALSE;
1340white_count = 0;
1341for (p = whitelisted; *p != '\0'; ++p)
1342 {
1343 if (*p == ':' || isspace(*p))
1344 {
1345 *p = '\0';
1346 if (prev_char_item)
1347 ++white_count;
1348 prev_char_item = FALSE;
1349 continue;
1350 }
1351 if (!prev_char_item)
1352 prev_char_item = TRUE;
1353 }
1354end = p;
1355if (prev_char_item)
1356 ++white_count;
1357if (!white_count)
1358 return FALSE;
1359whites = store_malloc(sizeof(uschar *) * (white_count+1));
1360for (p = whitelisted, i = 0; (p != end) && (i < white_count); ++p)
1361 {
1362 if (*p != '\0')
1363 {
1364 whites[i++] = p;
1365 if (i == white_count)
1366 break;
1367 while (*p != '\0' && p < end)
1368 ++p;
1369 }
1370 }
1371whites[i] = NULL;
1372
1a7c9a48
JH
1373/* The list of commandline macros should be very short.
1374Accept the N*M complexity. */
85e03244 1375for (m = macros_user; m; m = m->next) if (m->command_line)
1a7c9a48
JH
1376 {
1377 found = FALSE;
1378 for (w = whites; *w; ++w)
1379 if (Ustrcmp(*w, m->name) == 0)
1380 {
1381 found = TRUE;
1382 break;
1383 }
1384 if (!found)
1385 return FALSE;
1386 if (!m->replacement)
1387 continue;
1388 if ((len = m->replen) == 0)
1389 continue;
1390 n = pcre_exec(regex_whitelisted_macro, NULL, CS m->replacement, len,
1391 0, PCRE_EOPT, NULL, 0);
1392 if (n < 0)
1393 {
1394 if (n != PCRE_ERROR_NOMATCH)
1395 debug_printf("macros_trusted checking %s returned %d\n", m->name, n);
1396 return FALSE;
1397 }
1398 }
43236f35 1399DEBUG(D_any) debug_printf("macros_trusted overridden to true by whitelisting\n");
a7cbbf50
PP
1400return TRUE;
1401#endif
1402}
1403
1404
1405/*************************************************
9650d98a
JH
1406* Expansion testing *
1407*************************************************/
1408
1409/* Expand and print one item, doing macro-processing.
1410
1411Arguments:
1412 item line for expansion
1413*/
1414
1415static void
1416expansion_test_line(uschar * line)
1417{
1418int len;
1419BOOL dummy_macexp;
1420
1421Ustrncpy(big_buffer, line, big_buffer_size);
1422big_buffer[big_buffer_size-1] = '\0';
1423len = Ustrlen(big_buffer);
1424
1425(void) macros_expand(0, &len, &dummy_macexp);
1426
1427if (isupper(big_buffer[0]))
1428 {
1429 if (macro_read_assignment(big_buffer))
1a7c9a48 1430 printf("Defined macro '%s'\n", mlast->name);
9650d98a
JH
1431 }
1432else
1433 if ((line = expand_string(big_buffer))) printf("%s\n", CS line);
1434 else printf("Failed: %s\n", expand_string_message);
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;
4ab69ec7 1497BOOL opt_D_used = FALSE;
059ec3d9
PH
1498BOOL queue_only_set = FALSE;
1499BOOL receiving_message = TRUE;
33d73e3b 1500BOOL sender_ident_set = FALSE;
8669f003 1501BOOL session_local_queue_only;
059ec3d9
PH
1502BOOL unprivileged;
1503BOOL removed_privilege = FALSE;
81ea09ca 1504BOOL usage_wanted = FALSE;
059ec3d9
PH
1505BOOL verify_address_mode = FALSE;
1506BOOL verify_as_sender = FALSE;
1507BOOL version_printed = FALSE;
1508uschar *alias_arg = NULL;
1509uschar *called_as = US"";
a3fb9793 1510uschar *cmdline_syslog_name = NULL;
059ec3d9
PH
1511uschar *start_queue_run_id = NULL;
1512uschar *stop_queue_run_id = NULL;
328895cc 1513uschar *expansion_test_message = NULL;
059ec3d9
PH
1514uschar *ftest_domain = NULL;
1515uschar *ftest_localpart = NULL;
1516uschar *ftest_prefix = NULL;
1517uschar *ftest_suffix = NULL;
0ad2e0fc 1518uschar *log_oneline = NULL;
8544e77a 1519uschar *malware_test_file = NULL;
059ec3d9
PH
1520uschar *real_sender_address;
1521uschar *originator_home = US"/";
a3fb9793 1522size_t sz;
059ec3d9
PH
1523void *reset_point;
1524
1525struct passwd *pw;
1526struct stat statbuf;
1527pid_t passed_qr_pid = (pid_t)0;
1528int passed_qr_pipe = -1;
1529gid_t group_list[NGROUPS_MAX];
1530
98a90c36
PP
1531/* For the -bI: flag */
1532enum commandline_info info_flag = CMDINFO_NONE;
1533BOOL info_stdout = FALSE;
1534
059ec3d9
PH
1535/* Possible options for -R and -S */
1536
1537static uschar *rsopts[] = { US"f", US"ff", US"r", US"rf", US"rff" };
1538
1539/* Need to define this in case we need to change the environment in order
1540to get rid of a bogus time zone. We have to make it char rather than uschar
1541because some OS define it in /usr/include/unistd.h. */
1542
1543extern char **environ;
1544
35edf2ff 1545/* If the Exim user and/or group and/or the configuration file owner/group were
059ec3d9
PH
1546defined by ref:name at build time, we must now find the actual uid/gid values.
1547This is a feature to make the lives of binary distributors easier. */
1548
1549#ifdef EXIM_USERNAME
1550if (route_finduser(US EXIM_USERNAME, &pw, &exim_uid))
1551 {
10385c15
PP
1552 if (exim_uid == 0)
1553 {
1554 fprintf(stderr, "exim: refusing to run with uid 0 for \"%s\"\n",
1555 EXIM_USERNAME);
1556 exit(EXIT_FAILURE);
1557 }
084c1d8c
PP
1558 /* If ref:name uses a number as the name, route_finduser() returns
1559 TRUE with exim_uid set and pw coerced to NULL. */
1560 if (pw)
1561 exim_gid = pw->pw_gid;
1562#ifndef EXIM_GROUPNAME
1563 else
1564 {
1565 fprintf(stderr,
1566 "exim: ref:name should specify a usercode, not a group.\n"
1567 "exim: can't let you get away with it unless you also specify a group.\n");
1568 exit(EXIT_FAILURE);
1569 }
1570#endif
059ec3d9
PH
1571 }
1572else
1573 {
1574 fprintf(stderr, "exim: failed to find uid for user name \"%s\"\n",
1575 EXIM_USERNAME);
1576 exit(EXIT_FAILURE);
1577 }
1578#endif
1579
1580#ifdef EXIM_GROUPNAME
1581if (!route_findgroup(US EXIM_GROUPNAME, &exim_gid))
1582 {
1583 fprintf(stderr, "exim: failed to find gid for group name \"%s\"\n",
1584 EXIM_GROUPNAME);
1585 exit(EXIT_FAILURE);
1586 }
1587#endif
1588
1589#ifdef CONFIGURE_OWNERNAME
1590if (!route_finduser(US CONFIGURE_OWNERNAME, NULL, &config_uid))
1591 {
1592 fprintf(stderr, "exim: failed to find uid for user name \"%s\"\n",
1593 CONFIGURE_OWNERNAME);
1594 exit(EXIT_FAILURE);
1595 }
1596#endif
1597
79d4bc3d
PP
1598/* We default the system_filter_user to be the Exim run-time user, as a
1599sane non-root value. */
1600system_filter_uid = exim_uid;
1601
35edf2ff
PH
1602#ifdef CONFIGURE_GROUPNAME
1603if (!route_findgroup(US CONFIGURE_GROUPNAME, &config_gid))
1604 {
1605 fprintf(stderr, "exim: failed to find gid for group name \"%s\"\n",
1606 CONFIGURE_GROUPNAME);
1607 exit(EXIT_FAILURE);
1608 }
1609#endif
1610
92e6a3d9
JH
1611/* In the Cygwin environment, some initialization used to need doing.
1612It was fudged in by means of this macro; now no longer but we'll leave
1613it in case of others. */
059ec3d9
PH
1614
1615#ifdef OS_INIT
1616OS_INIT
1617#endif
1618
1619/* Check a field which is patched when we are running Exim within its
1620testing harness; do a fast initial check, and then the whole thing. */
1621
1622running_in_test_harness =
1623 *running_status == '<' && Ustrcmp(running_status, "<<<testing>>>") == 0;
1624
1625/* The C standard says that the equivalent of setlocale(LC_ALL, "C") is obeyed
1626at the start of a program; however, it seems that some environments do not
1627follow this. A "strange" locale can affect the formatting of timestamps, so we
1628make quite sure. */
1629
1630setlocale(LC_ALL, "C");
1631
1632/* Set up the default handler for timing using alarm(). */
1633
1634os_non_restarting_signal(SIGALRM, sigalrm_handler);
1635
1636/* Ensure we have a buffer for constructing log entries. Use malloc directly,
1637because store_malloc writes a log entry on failure. */
1638
40c90bca 1639if (!(log_buffer = US malloc(LOG_BUFFER_SIZE)))
059ec3d9
PH
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
4c04137d 1875 /* An option consisting of -- terminates the options */
059ec3d9
PH
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';
1a6230a3 2050 message_logs = FALSE;
059ec3d9
PH
2051 }
2052
2053 /* -bi: This option is used by sendmail to initialize *the* alias file,
2054 though it has the -oA option to specify a different file. Exim has no
2055 concept of *the* alias file, but since Sun's YP make script calls
2056 sendmail this way, some support must be provided. */
2057
2058 else if (Ustrcmp(argrest, "i") == 0) bi_option = TRUE;
2059
98a90c36
PP
2060 /* -bI: provide information, of the type to follow after a colon.
2061 This is an Exim flag. */
2062
2063 else if (argrest[0] == 'I' && Ustrlen(argrest) >= 2 && argrest[1] == ':')
2064 {
2065 uschar *p = &argrest[2];
2066 info_flag = CMDINFO_HELP;
2067 if (Ustrlen(p))
2068 {
2069 if (strcmpic(p, CUS"sieve") == 0)
2070 {
2071 info_flag = CMDINFO_SIEVE;
2072 info_stdout = TRUE;
2073 }
36a3ae5f
PP
2074 else if (strcmpic(p, CUS"dscp") == 0)
2075 {
2076 info_flag = CMDINFO_DSCP;
2077 info_stdout = TRUE;
2078 }
98a90c36
PP
2079 else if (strcmpic(p, CUS"help") == 0)
2080 {
2081 info_stdout = TRUE;
2082 }
2083 }
2084 }
2085
059ec3d9
PH
2086 /* -bm: Accept and deliver message - the default option. Reinstate
2087 receiving_message, which got turned off for all -b options. */
2088
2089 else if (Ustrcmp(argrest, "m") == 0) receiving_message = TRUE;
2090
8544e77a
PP
2091 /* -bmalware: test the filename given for malware */
2092
2093 else if (Ustrcmp(argrest, "malware") == 0)
2094 {
2095 if (++i >= argc) { badarg = TRUE; break; }
34e86e20 2096 checking = TRUE;
8544e77a
PP
2097 malware_test_file = argv[i];
2098 }
2099
059ec3d9
PH
2100 /* -bnq: For locally originating messages, do not qualify unqualified
2101 addresses. In the envelope, this causes errors; in header lines they
2102 just get left. */
2103
2104 else if (Ustrcmp(argrest, "nq") == 0)
2105 {
2106 allow_unqualified_sender = FALSE;
2107 allow_unqualified_recipient = FALSE;
2108 }
2109
2110 /* -bpxx: List the contents of the mail queue, in various forms. If
2111 the option is -bpc, just a queue count is needed. Otherwise, if the
2112 first letter after p is r, then order is random. */
2113
2114 else if (*argrest == 'p')
2115 {
2116 if (*(++argrest) == 'c')
2117 {
2118 count_queue = TRUE;
2119 if (*(++argrest) != 0) badarg = TRUE;
2120 break;
2121 }
2122
2123 if (*argrest == 'r')
2124 {
2125 list_queue_option = 8;
2126 argrest++;
2127 }
2128 else list_queue_option = 0;
2129
2130 list_queue = TRUE;
2131
2132 /* -bp: List the contents of the mail queue, top-level only */
2133
2134 if (*argrest == 0) {}
2135
2136 /* -bpu: List the contents of the mail queue, top-level undelivered */
2137
2138 else if (Ustrcmp(argrest, "u") == 0) list_queue_option += 1;
2139
2140 /* -bpa: List the contents of the mail queue, including all delivered */
2141
2142 else if (Ustrcmp(argrest, "a") == 0) list_queue_option += 2;
2143
2144 /* Unknown after -bp[r] */
2145
2146 else
2147 {
2148 badarg = TRUE;
2149 break;
2150 }
2151 }
2152
2153
2154 /* -bP: List the configuration variables given as the address list.
2155 Force -v, so configuration errors get displayed. */
2156
2157 else if (Ustrcmp(argrest, "P") == 0)
2158 {
bf3c2c6b
HSHR
2159 /* -bP config: we need to setup here, because later,
2160 * when list_options is checked, the config is read already */
2161 if (argv[i+1] && Ustrcmp(argv[i+1], "config") == 0)
2162 {
2163 list_config = TRUE;
2164 readconf_save_config(version_string);
2165 }
2166 else
2167 {
2168 list_options = TRUE;
2169 debug_selector |= D_v;
2170 debug_file = stderr;
2171 }
059ec3d9
PH
2172 }
2173
2174 /* -brt: Test retry configuration lookup */
2175
2176 else if (Ustrcmp(argrest, "rt") == 0)
2177 {
34e86e20 2178 checking = TRUE;
059ec3d9
PH
2179 test_retry_arg = i + 1;
2180 goto END_ARG;
2181 }
2182
2183 /* -brw: Test rewrite configuration */
2184
2185 else if (Ustrcmp(argrest, "rw") == 0)
2186 {
34e86e20 2187 checking = TRUE;
059ec3d9
PH
2188 test_rewrite_arg = i + 1;
2189 goto END_ARG;
2190 }
2191
2192 /* -bS: Read SMTP commands on standard input, but produce no replies -
2193 all errors are reported by sending messages. */
2194
2195 else if (Ustrcmp(argrest, "S") == 0)
2196 smtp_input = smtp_batched_input = receiving_message = TRUE;
2197
2198 /* -bs: Read SMTP commands on standard input and produce SMTP replies
2199 on standard output. */
2200
2201 else if (Ustrcmp(argrest, "s") == 0) smtp_input = receiving_message = TRUE;
2202
2203 /* -bt: address testing mode */
2204
2205 else if (Ustrcmp(argrest, "t") == 0)
2206 address_test_mode = checking = log_testing_mode = TRUE;
2207
2208 /* -bv: verify addresses */
2209
2210 else if (Ustrcmp(argrest, "v") == 0)
2211 verify_address_mode = checking = log_testing_mode = TRUE;
2212
2213 /* -bvs: verify sender addresses */
2214
2215 else if (Ustrcmp(argrest, "vs") == 0)
2216 {
2217 verify_address_mode = checking = log_testing_mode = TRUE;
2218 verify_as_sender = TRUE;
2219 }
2220
2221 /* -bV: Print version string and support details */
2222
2223 else if (Ustrcmp(argrest, "V") == 0)
2224 {
2225 printf("Exim version %s #%s built %s\n", version_string,
2226 version_cnumber, version_date);
2227 printf("%s\n", CS version_copyright);
2228 version_printed = TRUE;
2229 show_whats_supported(stdout);
b25c9675 2230 log_testing_mode = TRUE;
059ec3d9
PH
2231 }
2232
9ee44efb
PP
2233 /* -bw: inetd wait mode, accept a listening socket as stdin */
2234
2235 else if (*argrest == 'w')
2236 {
2237 inetd_wait_mode = TRUE;
2238 background_daemon = FALSE;
2239 daemon_listen = TRUE;
2240 if (*(++argrest) != '\0')
2241 {
2242 inetd_wait_timeout = readconf_readtime(argrest, 0, FALSE);
2243 if (inetd_wait_timeout <= 0)
2244 {
2245 fprintf(stderr, "exim: bad time value %s: abandoned\n", argv[i]);
2246 exit(EXIT_FAILURE);
2247 }
2248 }
2249 }
2250
059ec3d9
PH
2251 else badarg = TRUE;
2252 break;
2253
2254
2255 /* -C: change configuration file list; ignore if it isn't really
2256 a change! Enforce a prefix check if required. */
2257
2258 case 'C':
2259 if (*argrest == 0)
2260 {
2261 if(++i < argc) argrest = argv[i]; else
2262 { badarg = TRUE; break; }
2263 }
2264 if (Ustrcmp(config_main_filelist, argrest) != 0)
2265 {
2266 #ifdef ALT_CONFIG_PREFIX
2267 int sep = 0;
2268 int len = Ustrlen(ALT_CONFIG_PREFIX);
863bd541 2269 const uschar *list = argrest;
059ec3d9
PH
2270 uschar *filename;
2271 while((filename = string_nextinlist(&list, &sep, big_buffer,
2272 big_buffer_size)) != NULL)
2273 {
2274 if ((Ustrlen(filename) < len ||
2275 Ustrncmp(filename, ALT_CONFIG_PREFIX, len) != 0 ||
2276 Ustrstr(filename, "/../") != NULL) &&
2277 (Ustrcmp(filename, "/dev/null") != 0 || real_uid != root_uid))
2278 {
2279 fprintf(stderr, "-C Permission denied\n");
2280 exit(EXIT_FAILURE);
2281 }
2282 }
2283 #endif
261dc43e
DW
2284 if (real_uid != root_uid)
2285 {
90b6341f 2286 #ifdef TRUSTED_CONFIG_LIST
261dc43e 2287
90b6341f
DW
2288 if (real_uid != exim_uid
2289 #ifdef CONFIGURE_OWNER
2290 && real_uid != config_uid
2291 #endif
2292 )
261dc43e
DW
2293 trusted_config = FALSE;
2294 else
2295 {
90b6341f 2296 FILE *trust_list = Ufopen(TRUSTED_CONFIG_LIST, "rb");
261dc43e
DW
2297 if (trust_list)
2298 {
2299 struct stat statbuf;
2300
2301 if (fstat(fileno(trust_list), &statbuf) != 0 ||
2302 (statbuf.st_uid != root_uid /* owner not root */
2303 #ifdef CONFIGURE_OWNER
2304 && statbuf.st_uid != config_uid /* owner not the special one */
2305 #endif
2306 ) || /* or */
2307 (statbuf.st_gid != root_gid /* group not root */
2308 #ifdef CONFIGURE_GROUP
2309 && statbuf.st_gid != config_gid /* group not the special one */
2310 #endif
2311 && (statbuf.st_mode & 020) != 0 /* group writeable */
2312 ) || /* or */
2313 (statbuf.st_mode & 2) != 0) /* world writeable */
2314 {
2315 trusted_config = FALSE;
2316 fclose(trust_list);
2317 }
2318 else
2319 {
2320 /* Well, the trust list at least is up to scratch... */
2321 void *reset_point = store_get(0);
90b6341f
DW
2322 uschar *trusted_configs[32];
2323 int nr_configs = 0;
261dc43e
DW
2324 int i = 0;
2325
2326 while (Ufgets(big_buffer, big_buffer_size, trust_list))
2327 {
2328 uschar *start = big_buffer, *nl;
2329 while (*start && isspace(*start))
2330 start++;
1e83d68b 2331 if (*start != '/')
261dc43e
DW
2332 continue;
2333 nl = Ustrchr(start, '\n');
2334 if (nl)
2335 *nl = 0;
90b6341f
DW
2336 trusted_configs[nr_configs++] = string_copy(start);
2337 if (nr_configs == 32)
261dc43e
DW
2338 break;
2339 }
2340 fclose(trust_list);
2341
90b6341f 2342 if (nr_configs)
261dc43e
DW
2343 {
2344 int sep = 0;
55414b25 2345 const uschar *list = argrest;
261dc43e
DW
2346 uschar *filename;
2347 while (trusted_config && (filename = string_nextinlist(&list,
2348 &sep, big_buffer, big_buffer_size)) != NULL)
2349 {
90b6341f 2350 for (i=0; i < nr_configs; i++)
261dc43e 2351 {
90b6341f 2352 if (Ustrcmp(filename, trusted_configs[i]) == 0)
261dc43e
DW
2353 break;
2354 }
90b6341f 2355 if (i == nr_configs)
261dc43e
DW
2356 {
2357 trusted_config = FALSE;
2358 break;
2359 }
2360 }
1e83d68b 2361 store_reset(reset_point);
261dc43e
DW
2362 }
2363 else
2364 {
2365 /* No valid prefixes found in trust_list file. */
2366 trusted_config = FALSE;
2367 }
2368 }
2369 }
2370 else
2371 {
2372 /* Could not open trust_list file. */
2373 trusted_config = FALSE;
2374 }
2375 }
2376 #else
2377 /* Not root; don't trust config */
2378 trusted_config = FALSE;
2379 #endif
2380 }
059ec3d9
PH
2381
2382 config_main_filelist = argrest;
2383 config_changed = TRUE;
2384 }
2385 break;
2386
2387
2388 /* -D: set up a macro definition */
2389
2390 case 'D':
2391 #ifdef DISABLE_D_OPTION
2392 fprintf(stderr, "exim: -D is not available in this Exim binary\n");
2393 exit(EXIT_FAILURE);
2394 #else
2395 {
2396 int ptr = 0;
059ec3d9
PH
2397 macro_item *m;
2398 uschar name[24];
2399 uschar *s = argrest;
2400
4ab69ec7 2401 opt_D_used = TRUE;
059ec3d9
PH
2402 while (isspace(*s)) s++;
2403
2404 if (*s < 'A' || *s > 'Z')
2405 {
2406 fprintf(stderr, "exim: macro name set by -D must start with "
2407 "an upper case letter\n");
2408 exit(EXIT_FAILURE);
2409 }
2410
2411 while (isalnum(*s) || *s == '_')
2412 {
2413 if (ptr < sizeof(name)-1) name[ptr++] = *s;
2414 s++;
2415 }
2416 name[ptr] = 0;
2417 if (ptr == 0) { badarg = TRUE; break; }
2418 while (isspace(*s)) s++;
2419 if (*s != 0)
2420 {
2421 if (*s++ != '=') { badarg = TRUE; break; }
2422 while (isspace(*s)) s++;
2423 }
2424
85e03244 2425 for (m = macros_user; m; m = m->next)
1a7c9a48
JH
2426 if (Ustrcmp(m->name, name) == 0)
2427 {
2428 fprintf(stderr, "exim: duplicated -D in command line\n");
2429 exit(EXIT_FAILURE);
2430 }
059ec3d9 2431
85e03244 2432 m = macro_create(name, s, TRUE);
059ec3d9
PH
2433
2434 if (clmacro_count >= MAX_CLMACROS)
2435 {
2436 fprintf(stderr, "exim: too many -D options on command line\n");
2437 exit(EXIT_FAILURE);
2438 }
1a7c9a48
JH
2439 clmacros[clmacro_count++] = string_sprintf("-D%s=%s", m->name,
2440 m->replacement);
059ec3d9
PH
2441 }
2442 #endif
2443 break;
2444
2445 /* -d: Set debug level (see also -v below) or set the drop_cr option.
8e669ac1 2446 The latter is now a no-op, retained for compatibility only. If -dd is used,
3d235903 2447 debugging subprocesses of the daemon is disabled. */
059ec3d9
PH
2448
2449 case 'd':
2450 if (Ustrcmp(argrest, "ropcr") == 0)
2451 {
2452 /* drop_cr = TRUE; */
2453 }
2454
2455 /* Use an intermediate variable so that we don't set debugging while
2456 decoding the debugging bits. */
2457
2458 else
2459 {
2460 unsigned int selector = D_default;
2461 debug_selector = 0;
2462 debug_file = NULL;
3d235903
PH
2463 if (*argrest == 'd')
2464 {
2465 debug_daemon = TRUE;
2466 argrest++;
2467 }
059ec3d9 2468 if (*argrest != 0)
6c6d6e48
TF
2469 decode_bits(&selector, 1, debug_notall, argrest,
2470 debug_options, debug_options_count, US"debug", 0);
059ec3d9
PH
2471 debug_selector = selector;
2472 }
2473 break;
2474
2475
2476 /* -E: This is a local error message. This option is not intended for
2477 external use at all, but is not restricted to trusted callers because it
2478 does no harm (just suppresses certain error messages) and if Exim is run
2479 not setuid root it won't always be trusted when it generates error
2480 messages using this option. If there is a message id following -E, point
2481 message_reference at it, for logging. */
2482
2483 case 'E':
2484 local_error_message = TRUE;
2485 if (mac_ismsgid(argrest)) message_reference = argrest;
2486 break;
2487
2488
2489 /* -ex: The vacation program calls sendmail with the undocumented "-eq"
2490 option, so it looks as if historically the -oex options are also callable
2491 without the leading -o. So we have to accept them. Before the switch,
2492 anything starting -oe has been converted to -e. Exim does not support all
2493 of the sendmail error options. */
2494
2495 case 'e':
2496 if (Ustrcmp(argrest, "e") == 0)
2497 {
2498 arg_error_handling = ERRORS_SENDER;
2499 errors_sender_rc = EXIT_SUCCESS;
2500 }
2501 else if (Ustrcmp(argrest, "m") == 0) arg_error_handling = ERRORS_SENDER;
2502 else if (Ustrcmp(argrest, "p") == 0) arg_error_handling = ERRORS_STDERR;
2503 else if (Ustrcmp(argrest, "q") == 0) arg_error_handling = ERRORS_STDERR;
2504 else if (Ustrcmp(argrest, "w") == 0) arg_error_handling = ERRORS_SENDER;
2505 else badarg = TRUE;
2506 break;
2507
2508
2509 /* -F: Set sender's full name, used instead of the gecos entry from
2510 the password file. Since users can usually alter their gecos entries,
2511 there's no security involved in using this instead. The data can follow
2512 the -F or be in the next argument. */
2513
2514 case 'F':
2515 if (*argrest == 0)
2516 {
2517 if(++i < argc) argrest = argv[i]; else
2518 { badarg = TRUE; break; }
2519 }
2520 originator_name = argrest;
2fe1a124 2521 sender_name_forced = TRUE;
059ec3d9
PH
2522 break;
2523
2524
2525 /* -f: Set sender's address - this value is only actually used if Exim is
2526 run by a trusted user, or if untrusted_set_sender is set and matches the
2527 address, except that the null address can always be set by any user. The
2528 test for this happens later, when the value given here is ignored when not
2529 permitted. For an untrusted user, the actual sender is still put in Sender:
2530 if it doesn't match the From: header (unless no_local_from_check is set).
2531 The data can follow the -f or be in the next argument. The -r switch is an
2532 obsolete form of -f but since there appear to be programs out there that
2533 use anything that sendmail has ever supported, better accept it - the
2534 synonymizing is done before the switch above.
2535
2536 At this stage, we must allow domain literal addresses, because we don't
2537 know what the setting of allow_domain_literals is yet. Ditto for trailing
2538 dots and strip_trailing_dot. */
2539
2540 case 'f':
2541 {
250b6871 2542 int dummy_start, dummy_end;
059ec3d9
PH
2543 uschar *errmess;
2544 if (*argrest == 0)
2545 {
2546 if (i+1 < argc) argrest = argv[++i]; else
2547 { badarg = TRUE; break; }
2548 }
2549 if (*argrest == 0)
059ec3d9 2550 sender_address = string_sprintf(""); /* Ensure writeable memory */
059ec3d9
PH
2551 else
2552 {
2553 uschar *temp = argrest + Ustrlen(argrest) - 1;
2554 while (temp >= argrest && isspace(*temp)) temp--;
2555 if (temp >= argrest && *temp == '.') f_end_dot = TRUE;
2556 allow_domain_literals = TRUE;
2557 strip_trailing_dot = TRUE;
8c5d388a 2558#ifdef SUPPORT_I18N
250b6871
JH
2559 allow_utf8_domains = TRUE;
2560#endif
2561 sender_address = parse_extract_address(argrest, &errmess,
2562 &dummy_start, &dummy_end, &sender_address_domain, TRUE);
8c5d388a 2563#ifdef SUPPORT_I18N
250b6871
JH
2564 message_smtputf8 = string_is_utf8(sender_address);
2565 allow_utf8_domains = FALSE;
2566#endif
059ec3d9
PH
2567 allow_domain_literals = FALSE;
2568 strip_trailing_dot = FALSE;
2569 if (sender_address == NULL)
2570 {
2571 fprintf(stderr, "exim: bad -f address \"%s\": %s\n", argrest, errmess);
2572 return EXIT_FAILURE;
2573 }
2574 }
2575 sender_address_forced = TRUE;
2576 }
2577 break;
2578
a3fb9793 2579 /* -G: sendmail invocation to specify that it's a gateway submission and
f4ee74ac
PP
2580 sendmail may complain about problems instead of fixing them.
2581 We make it equivalent to an ACL "control = suppress_local_fixups" and do
2582 not at this time complain about problems. */
059ec3d9
PH
2583
2584 case 'G':
f4ee74ac 2585 flag_G = TRUE;
059ec3d9
PH
2586 break;
2587
2588 /* -h: Set the hop count for an incoming message. Exim does not currently
2589 support this; it always computes it by counting the Received: headers.
2590 To put it in will require a change to the spool header file format. */
2591
2592 case 'h':
2593 if (*argrest == 0)
2594 {
2595 if(++i < argc) argrest = argv[i]; else
2596 { badarg = TRUE; break; }
2597 }
2598 if (!isdigit(*argrest)) badarg = TRUE;
2599 break;
2600
2601
2602 /* -i: Set flag so dot doesn't end non-SMTP input (same as -oi, seems
2603 not to be documented for sendmail but mailx (at least) uses it) */
2604
2605 case 'i':
2606 if (*argrest == 0) dot_ends = FALSE; else badarg = TRUE;
2607 break;
2608
2609
a3fb9793
PP
2610 /* -L: set the identifier used for syslog; equivalent to setting
2611 syslog_processname in the config file, but needs to be an admin option. */
2612
2613 case 'L':
2614 if (*argrest == '\0')
2615 {
2616 if(++i < argc) argrest = argv[i]; else
2617 { badarg = TRUE; break; }
2618 }
2619 sz = Ustrlen(argrest);
2620 if (sz > 32)
2621 {
2622 fprintf(stderr, "exim: the -L syslog name is too long: \"%s\"\n", argrest);
2623 return EXIT_FAILURE;
2624 }
2625 if (sz < 1)
2626 {
2627 fprintf(stderr, "exim: the -L syslog name is too short\n");
2628 return EXIT_FAILURE;
2629 }
2630 cmdline_syslog_name = argrest;
2631 break;
2632
059ec3d9
PH
2633 case 'M':
2634 receiving_message = FALSE;
2635
2636 /* -MC: continue delivery of another message via an existing open
2637 file descriptor. This option is used for an internal call by the
2638 smtp transport when there is a pending message waiting to go to an
2639 address to which it has got a connection. Five subsequent arguments are
2640 required: transport name, host name, IP address, sequence number, and
2641 message_id. Transports may decline to create new processes if the sequence
2642 number gets too big. The channel is stdin. This (-MC) must be the last
2643 argument. There's a subsequent check that the real-uid is privileged.
2644
2645 If we are running in the test harness. delay for a bit, to let the process
2646 that set this one up complete. This makes for repeatability of the logging,
2647 etc. output. */
2648
2649 if (Ustrcmp(argrest, "C") == 0)
2650 {
41c7c167
PH
2651 union sockaddr_46 interface_sock;
2652 EXIM_SOCKLEN_T size = sizeof(interface_sock);
2653
059ec3d9
PH
2654 if (argc != i + 6)
2655 {
2656 fprintf(stderr, "exim: too many or too few arguments after -MC\n");
2657 return EXIT_FAILURE;
2658 }
2659
2660 if (msg_action_arg >= 0)
2661 {
2662 fprintf(stderr, "exim: incompatible arguments\n");
2663 return EXIT_FAILURE;
2664 }
2665
2666 continue_transport = argv[++i];
2667 continue_hostname = argv[++i];
2668 continue_host_address = argv[++i];
2669 continue_sequence = Uatoi(argv[++i]);
2670 msg_action = MSG_DELIVER;
2671 msg_action_arg = ++i;
2672 forced_delivery = TRUE;
2673 queue_run_pid = passed_qr_pid;
2674 queue_run_pipe = passed_qr_pipe;
2675
2676 if (!mac_ismsgid(argv[i]))
2677 {
2678 fprintf(stderr, "exim: malformed message id %s after -MC option\n",
2679 argv[i]);
2680 return EXIT_FAILURE;
2681 }
2682
875512a3
JH
2683 /* Set up $sending_ip_address and $sending_port, unless proxied */
2684
5013d912 2685 if (!continue_proxy_cipher)
875512a3
JH
2686 if (getsockname(fileno(stdin), (struct sockaddr *)(&interface_sock),
2687 &size) == 0)
2688 sending_ip_address = host_ntoa(-1, &interface_sock, NULL,
2689 &sending_port);
2690 else
2691 {
2692 fprintf(stderr, "exim: getsockname() failed after -MC option: %s\n",
2693 strerror(errno));
2694 return EXIT_FAILURE;
2695 }
41c7c167 2696
059ec3d9
PH
2697 if (running_in_test_harness) millisleep(500);
2698 break;
2699 }
2700
2d14f397
JH
2701 else if (*argrest == 'C' && argrest[1] && !argrest[2])
2702 {
875512a3 2703 switch(argrest[1])
2d14f397 2704 {
059ec3d9
PH
2705 /* -MCA: set the smtp_authenticated flag; this is useful only when it
2706 precedes -MC (see above). The flag indicates that the host to which
2707 Exim is connected has accepted an AUTH sequence. */
2708
2d14f397 2709 case 'A': smtp_authenticated = TRUE; break;
059ec3d9 2710
6c1c3d1d
WB
2711 /* -MCD: set the smtp_use_dsn flag; this indicates that the host
2712 that exim is connected to supports the esmtp extension DSN */
28b3821f 2713
14de8063 2714 case 'D': smtp_peer_options |= OPTION_DSN; break;
6c1c3d1d 2715
e37f8a84 2716 /* -MCG: set the queue name, to a non-default value */
28b3821f 2717
2d14f397
JH
2718 case 'G': if (++i < argc) queue_name = string_copy(argv[i]);
2719 else badarg = TRUE;
2720 break;
2721
2722 /* -MCK: the peer offered CHUNKING. Must precede -MC */
2723
14de8063 2724 case 'K': smtp_peer_options |= OPTION_CHUNKING; break;
28b3821f 2725
059ec3d9
PH
2726 /* -MCP: set the smtp_use_pipelining flag; this is useful only when
2727 it preceded -MC (see above) */
2728
14de8063 2729 case 'P': smtp_peer_options |= OPTION_PIPE; break;
059ec3d9
PH
2730
2731 /* -MCQ: pass on the pid of the queue-running process that started
2732 this chain of deliveries and the fd of its synchronizing pipe; this
2733 is useful only when it precedes -MC (see above) */
2734
2d14f397
JH
2735 case 'Q': if (++i < argc) passed_qr_pid = (pid_t)(Uatol(argv[i]));
2736 else badarg = TRUE;
2737 if (++i < argc) passed_qr_pipe = (int)(Uatol(argv[i]));
2738 else badarg = TRUE;
2739 break;
059ec3d9
PH
2740
2741 /* -MCS: set the smtp_use_size flag; this is useful only when it
2742 precedes -MC (see above) */
2743
14de8063 2744 case 'S': smtp_peer_options |= OPTION_SIZE; break;
059ec3d9 2745
2d14f397 2746#ifdef SUPPORT_TLS
875512a3
JH
2747 /* -MCt: similar to -MCT below but the connection is still open
2748 via a proxy proces which handles the TLS context and coding.
5013d912
JH
2749 Require three arguments for the proxied local address and port,
2750 and the TLS cipher. */
875512a3 2751
5013d912 2752 case 't': if (++i < argc) sending_ip_address = argv[i];
875512a3
JH
2753 else badarg = TRUE;
2754 if (++i < argc) sending_port = (int)(Uatol(argv[i]));
2755 else badarg = TRUE;
5013d912
JH
2756 if (++i < argc) continue_proxy_cipher = argv[i];
2757 else badarg = TRUE;
875512a3
JH
2758 /*FALLTHROUGH*/
2759
059ec3d9
PH
2760 /* -MCT: set the tls_offered flag; this is useful only when it
2761 precedes -MC (see above). The flag indicates that the host to which
2762 Exim is connected has offered TLS support. */
2763
14de8063 2764 case 'T': smtp_peer_options |= OPTION_TLS; break;
2d14f397
JH
2765#endif
2766
2767 default: badarg = TRUE; break;
2768 }
2769 break;
059ec3d9 2770 }
059ec3d9
PH
2771
2772 /* -M[x]: various operations on the following list of message ids:
2773 -M deliver the messages, ignoring next retry times and thawing
2774 -Mc deliver the messages, checking next retry times, no thawing
2775 -Mf freeze the messages
2776 -Mg give up on the messages
2777 -Mt thaw the messages
2778 -Mrm remove the messages
2779 In the above cases, this must be the last option. There are also the
2780 following options which are followed by a single message id, and which
2781 act on that message. Some of them use the "recipient" addresses as well.
2782 -Mar add recipient(s)
2783 -Mmad mark all recipients delivered
2784 -Mmd mark recipients(s) delivered
2785 -Mes edit sender
0ef732d9 2786 -Mset load a message for use with -be
059ec3d9 2787 -Mvb show body
a96603a0 2788 -Mvc show copy (of whole message, in RFC 2822 format)
059ec3d9
PH
2789 -Mvh show header
2790 -Mvl show log
2791 */
2792
2793 else if (*argrest == 0)
2794 {
2795 msg_action = MSG_DELIVER;
2796 forced_delivery = deliver_force_thaw = TRUE;
2797 }
2798 else if (Ustrcmp(argrest, "ar") == 0)
2799 {
2800 msg_action = MSG_ADD_RECIPIENT;
2801 one_msg_action = TRUE;
2802 }
2803 else if (Ustrcmp(argrest, "c") == 0) msg_action = MSG_DELIVER;
2804 else if (Ustrcmp(argrest, "es") == 0)
2805 {
2806 msg_action = MSG_EDIT_SENDER;
2807 one_msg_action = TRUE;
2808 }
2809 else if (Ustrcmp(argrest, "f") == 0) msg_action = MSG_FREEZE;
2810 else if (Ustrcmp(argrest, "g") == 0)
2811 {
2812 msg_action = MSG_DELIVER;
2813 deliver_give_up = TRUE;
2814 }
2815 else if (Ustrcmp(argrest, "mad") == 0)
2816 {
2817 msg_action = MSG_MARK_ALL_DELIVERED;
2818 }
2819 else if (Ustrcmp(argrest, "md") == 0)
2820 {
2821 msg_action = MSG_MARK_DELIVERED;
2822 one_msg_action = TRUE;
2823 }
2824 else if (Ustrcmp(argrest, "rm") == 0) msg_action = MSG_REMOVE;
0ef732d9
PH
2825 else if (Ustrcmp(argrest, "set") == 0)
2826 {
2827 msg_action = MSG_LOAD;
2828 one_msg_action = TRUE;
2829 }
059ec3d9
PH
2830 else if (Ustrcmp(argrest, "t") == 0) msg_action = MSG_THAW;
2831 else if (Ustrcmp(argrest, "vb") == 0)
2832 {
2833 msg_action = MSG_SHOW_BODY;
2834 one_msg_action = TRUE;
2835 }
a96603a0
PH
2836 else if (Ustrcmp(argrest, "vc") == 0)
2837 {
2838 msg_action = MSG_SHOW_COPY;
2839 one_msg_action = TRUE;
2840 }
059ec3d9
PH
2841 else if (Ustrcmp(argrest, "vh") == 0)
2842 {
2843 msg_action = MSG_SHOW_HEADER;
2844 one_msg_action = TRUE;
2845 }
2846 else if (Ustrcmp(argrest, "vl") == 0)
2847 {
2848 msg_action = MSG_SHOW_LOG;
2849 one_msg_action = TRUE;
2850 }
2851 else { badarg = TRUE; break; }
2852
2853 /* All the -Mxx options require at least one message id. */
2854
2855 msg_action_arg = i + 1;
2856 if (msg_action_arg >= argc)
2857 {
2858 fprintf(stderr, "exim: no message ids given after %s option\n", arg);
2859 return EXIT_FAILURE;
2860 }
2861
2862 /* Some require only message ids to follow */
2863
2864 if (!one_msg_action)
2865 {
2866 int j;
2867 for (j = msg_action_arg; j < argc; j++) if (!mac_ismsgid(argv[j]))
2868 {
2869 fprintf(stderr, "exim: malformed message id %s after %s option\n",
2870 argv[j], arg);
2871 return EXIT_FAILURE;
2872 }
2873 goto END_ARG; /* Remaining args are ids */
2874 }
2875
2876 /* Others require only one message id, possibly followed by addresses,
2877 which will be handled as normal arguments. */
2878
2879 else
2880 {
2881 if (!mac_ismsgid(argv[msg_action_arg]))
2882 {
2883 fprintf(stderr, "exim: malformed message id %s after %s option\n",
2884 argv[msg_action_arg], arg);
2885 return EXIT_FAILURE;
2886 }
2887 i++;
2888 }
2889 break;
2890
2891
2892 /* Some programs seem to call the -om option without the leading o;
2893 for sendmail it askes for "me too". Exim always does this. */
2894
2895 case 'm':
2896 if (*argrest != 0) badarg = TRUE;
2897 break;
2898
2899
2900 /* -N: don't do delivery - a debugging option that stops transports doing
2901 their thing. It implies debugging at the D_v level. */
2902
2903 case 'N':
2904 if (*argrest == 0)
2905 {
2906 dont_deliver = TRUE;
2907 debug_selector |= D_v;
2908 debug_file = stderr;
2909 }
2910 else badarg = TRUE;
2911 break;
2912
2913
12f69989
PP
2914 /* -n: This means "don't alias" in sendmail, apparently.
2915 For normal invocations, it has no effect.
2916 It may affect some other options. */
059ec3d9
PH
2917
2918 case 'n':
12f69989 2919 flag_n = TRUE;
059ec3d9
PH
2920 break;
2921
2922 /* -O: Just ignore it. In sendmail, apparently -O option=value means set
2923 option to the specified value. This form uses long names. We need to handle
2924 -O option=value and -Ooption=value. */
2925
2926 case 'O':
2927 if (*argrest == 0)
2928 {
2929 if (++i >= argc)
2930 {
2931 fprintf(stderr, "exim: string expected after -O\n");
2932 exit(EXIT_FAILURE);
2933 }
2934 }
2935 break;
2936
2937 case 'o':
2938
2939 /* -oA: Set an argument for the bi command (sendmail's "alternate alias
2940 file" option). */
2941
2942 if (*argrest == 'A')
2943 {
2944 alias_arg = argrest + 1;
2945 if (alias_arg[0] == 0)
2946 {
2947 if (i+1 < argc) alias_arg = argv[++i]; else
2948 {
2949 fprintf(stderr, "exim: string expected after -oA\n");
2950 exit(EXIT_FAILURE);
2951 }
2952 }
2953 }
2954
2955 /* -oB: Set a connection message max value for remote deliveries */
2956
2957 else if (*argrest == 'B')
2958 {
2959 uschar *p = argrest + 1;
2960 if (p[0] == 0)
2961 {
2962 if (i+1 < argc && isdigit((argv[i+1][0]))) p = argv[++i]; else
2963 {
2964 connection_max_messages = 1;
2965 p = NULL;
2966 }
2967 }
2968
2969 if (p != NULL)
2970 {
2971 if (!isdigit(*p))
2972 {
2973 fprintf(stderr, "exim: number expected after -oB\n");
2974 exit(EXIT_FAILURE);
2975 }
2976 connection_max_messages = Uatoi(p);
2977 }
2978 }
2979
2980 /* -odb: background delivery */
2981
2982 else if (Ustrcmp(argrest, "db") == 0)
2983 {
2984 synchronous_delivery = FALSE;
2985 arg_queue_only = FALSE;
2986 queue_only_set = TRUE;
2987 }
2988
2989 /* -odf: foreground delivery (smail-compatible option); same effect as
2990 -odi: interactive (synchronous) delivery (sendmail-compatible option)
2991 */
2992
2993 else if (Ustrcmp(argrest, "df") == 0 || Ustrcmp(argrest, "di") == 0)
2994 {
2995 synchronous_delivery = TRUE;
2996 arg_queue_only = FALSE;
2997 queue_only_set = TRUE;
2998 }
2999
3000 /* -odq: queue only */
3001
3002 else if (Ustrcmp(argrest, "dq") == 0)
3003 {
3004 synchronous_delivery = FALSE;
3005 arg_queue_only = TRUE;
3006 queue_only_set = TRUE;
3007 }
3008
3009 /* -odqs: queue SMTP only - do local deliveries and remote routing,
3010 but no remote delivery */
3011
3012 else if (Ustrcmp(argrest, "dqs") == 0)
3013 {
3014 queue_smtp = TRUE;
3015 arg_queue_only = FALSE;
3016 queue_only_set = TRUE;
3017 }
3018
3019 /* -oex: Sendmail error flags. As these are also accepted without the
3020 leading -o prefix, for compatibility with vacation and other callers,
3021 they are handled with -e above. */
3022
3023 /* -oi: Set flag so dot doesn't end non-SMTP input (same as -i)
3024 -oitrue: Another sendmail syntax for the same */
3025
3026 else if (Ustrcmp(argrest, "i") == 0 ||
3027 Ustrcmp(argrest, "itrue") == 0)
3028 dot_ends = FALSE;
3029
3030 /* -oM*: Set various characteristics for an incoming message; actually
3031 acted on for trusted callers only. */
3032
3033 else if (*argrest == 'M')
3034 {
3035 if (i+1 >= argc)
3036 {
3037 fprintf(stderr, "exim: data expected after -o%s\n", argrest);
3038 exit(EXIT_FAILURE);
3039 }
3040
3041 /* -oMa: Set sender host address */
3042
3043 if (Ustrcmp(argrest, "Ma") == 0) sender_host_address = argv[++i];
3044
3045 /* -oMaa: Set authenticator name */
3046
3047 else if (Ustrcmp(argrest, "Maa") == 0)
3048 sender_host_authenticated = argv[++i];
3049
3050 /* -oMas: setting authenticated sender */
3051
3052 else if (Ustrcmp(argrest, "Mas") == 0) authenticated_sender = argv[++i];
3053
3054 /* -oMai: setting authenticated id */
3055
3056 else if (Ustrcmp(argrest, "Mai") == 0) authenticated_id = argv[++i];
3057
3058 /* -oMi: Set incoming interface address */
3059
3060 else if (Ustrcmp(argrest, "Mi") == 0) interface_address = argv[++i];
3061
d2af03f4
HS
3062 /* -oMm: Message reference */
3063
3064 else if (Ustrcmp(argrest, "Mm") == 0)
3065 {
3066 if (!mac_ismsgid(argv[i+1]))
3067 {
3068 fprintf(stderr,"-oMm must be a valid message ID\n");
3069 exit(EXIT_FAILURE);
3070 }
3071 if (!trusted_config)
3072 {
3073 fprintf(stderr,"-oMm must be called by a trusted user/config\n");
3074 exit(EXIT_FAILURE);
3075 }
3076 message_reference = argv[++i];
3077 }
3078
059ec3d9
PH
3079 /* -oMr: Received protocol */
3080
65e061b7
HSHR
3081 else if (Ustrcmp(argrest, "Mr") == 0)
3082
3083 if (received_protocol)
3084 {
3085 fprintf(stderr, "received_protocol is set already\n");
3086 exit(EXIT_FAILURE);
3087 }
3088 else received_protocol = argv[++i];
059ec3d9
PH
3089
3090 /* -oMs: Set sender host name */
3091
3092 else if (Ustrcmp(argrest, "Ms") == 0) sender_host_name = argv[++i];
3093
3094 /* -oMt: Set sender ident */
3095
33d73e3b
PH
3096 else if (Ustrcmp(argrest, "Mt") == 0)
3097 {
3098 sender_ident_set = TRUE;
3099 sender_ident = argv[++i];
3100 }
059ec3d9
PH
3101
3102 /* Else a bad argument */
3103
3104 else
3105 {
3106 badarg = TRUE;
3107 break;
3108 }
3109 }
3110
3111 /* -om: Me-too flag for aliases. Exim always does this. Some programs
3112 seem to call this as -m (undocumented), so that is also accepted (see
3113 above). */
3114
3115 else if (Ustrcmp(argrest, "m") == 0) {}
3116
3117 /* -oo: An ancient flag for old-style addresses which still seems to
3118 crop up in some calls (see in SCO). */
3119
3120 else if (Ustrcmp(argrest, "o") == 0) {}
3121
3122 /* -oP <name>: set pid file path for daemon */
3123
3124 else if (Ustrcmp(argrest, "P") == 0)
3125 override_pid_file_path = argv[++i];
3126
3127 /* -or <n>: set timeout for non-SMTP acceptance
3128 -os <n>: set timeout for SMTP acceptance */
3129
3130 else if (*argrest == 'r' || *argrest == 's')
3131 {
3132 int *tp = (*argrest == 'r')?
3133 &arg_receive_timeout : &arg_smtp_receive_timeout;
3134 if (argrest[1] == 0)
3135 {
3136 if (i+1 < argc) *tp= readconf_readtime(argv[++i], 0, FALSE);
3137 }
3138 else *tp = readconf_readtime(argrest + 1, 0, FALSE);
3139 if (*tp < 0)
3140 {
3141 fprintf(stderr, "exim: bad time value %s: abandoned\n", argv[i]);
3142 exit(EXIT_FAILURE);
3143 }
3144 }
3145
3146 /* -oX <list>: Override local_interfaces and/or default daemon ports */
3147
3148 else if (Ustrcmp(argrest, "X") == 0)
3149 override_local_interfaces = argv[++i];
3150
3151 /* Unknown -o argument */
3152
3153 else badarg = TRUE;
3154 break;
3155
3156
3157 /* -ps: force Perl startup; -pd force delayed Perl startup */
3158
3159 case 'p':
3160 #ifdef EXIM_PERL
3161 if (*argrest == 's' && argrest[1] == 0)
3162 {
3163 perl_start_option = 1;
3164 break;
3165 }
3166 if (*argrest == 'd' && argrest[1] == 0)
3167 {
3168 perl_start_option = -1;
3169 break;
3170 }
3171 #endif
3172
3173 /* -panythingelse is taken as the Sendmail-compatible argument -prval:sval,
3174 which sets the host protocol and host name */
3175
3176 if (*argrest == 0)
5bfe3b35
JH
3177 if (i+1 < argc)
3178 argrest = argv[++i];
3179 else
059ec3d9 3180 { badarg = TRUE; break; }
059ec3d9
PH
3181
3182 if (*argrest != 0)
3183 {
65e061b7
HSHR
3184 uschar *hn;
3185
3186 if (received_protocol)
3187 {
3188 fprintf(stderr, "received_protocol is set already\n");
3189 exit(EXIT_FAILURE);
3190 }
3191
3192 hn = Ustrchr(argrest, ':');
059ec3d9 3193 if (hn == NULL)
059ec3d9 3194 received_protocol = argrest;
059ec3d9
PH
3195 else
3196 {
90341c71
JH
3197 int old_pool = store_pool;
3198 store_pool = POOL_PERM;
059ec3d9 3199 received_protocol = string_copyn(argrest, hn - argrest);
90341c71 3200 store_pool = old_pool;
059ec3d9
PH
3201 sender_host_name = hn + 1;
3202 }
3203 }
3204 break;
3205
3206
3207 case 'q':
3208 receiving_message = FALSE;
3cc66b45
PH
3209 if (queue_interval >= 0)
3210 {
3211 fprintf(stderr, "exim: -q specified more than once\n");
3212 exit(EXIT_FAILURE);
3213 }
059ec3d9
PH
3214
3215 /* -qq...: Do queue runs in a 2-stage manner */
3216
3217 if (*argrest == 'q')
3218 {
3219 queue_2stage = TRUE;
3220 argrest++;
3221 }
3222
3223 /* -qi...: Do only first (initial) deliveries */
3224
3225 if (*argrest == 'i')
3226 {
3227 queue_run_first_delivery = TRUE;
3228 argrest++;
3229 }
3230
3231 /* -qf...: Run the queue, forcing deliveries
3232 -qff..: Ditto, forcing thawing as well */
3233
3234 if (*argrest == 'f')
3235 {
3236 queue_run_force = TRUE;
55e70e76 3237 if (*++argrest == 'f')
059ec3d9
PH
3238 {
3239 deliver_force_thaw = TRUE;
3240 argrest++;
3241 }
3242 }
3243
3244 /* -q[f][f]l...: Run the queue only on local deliveries */
3245
3246 if (*argrest == 'l')
3247 {
3248 queue_run_local = TRUE;
3249 argrest++;
3250 }
3251
55e70e76 3252 /* -q[f][f][l][G<name>]... Work on the named queue */
28b3821f
JH
3253
3254 if (*argrest == 'G')
3255 {
fa665e0b
JH
3256 int i;
3257 for (argrest++, i = 0; argrest[i] && argrest[i] != '/'; ) i++;
3258 queue_name = string_copyn(argrest, i);
3259 argrest += i;
3260 if (*argrest == '/') argrest++;
28b3821f
JH
3261 }
3262
3263 /* -q[f][f][l][G<name>]: Run the queue, optionally forced, optionally local
3264 only, optionally named, optionally starting from a given message id. */
059ec3d9
PH
3265
3266 if (*argrest == 0 &&
3267 (i + 1 >= argc || argv[i+1][0] == '-' || mac_ismsgid(argv[i+1])))
3268 {
3269 queue_interval = 0;
3270 if (i+1 < argc && mac_ismsgid(argv[i+1]))
3271 start_queue_run_id = argv[++i];
3272 if (i+1 < argc && mac_ismsgid(argv[i+1]))
3273 stop_queue_run_id = argv[++i];
3274 }
3275
fa665e0b
JH
3276 /* -q[f][f][l][G<name>/]<n>: Run the queue at regular intervals, optionally
3277 forced, optionally local only, optionally named. */
059ec3d9 3278
55e70e76
JH
3279 else if ((queue_interval = readconf_readtime(*argrest ? argrest : argv[++i],
3280 0, FALSE)) <= 0)
059ec3d9 3281 {
55e70e76
JH
3282 fprintf(stderr, "exim: bad time value %s: abandoned\n", argv[i]);
3283 exit(EXIT_FAILURE);
059ec3d9
PH
3284 }
3285 break;
3286
3287
3288 case 'R': /* Synonymous with -qR... */
3289 receiving_message = FALSE;
3290
3291 /* -Rf: As -R (below) but force all deliveries,
3292 -Rff: Ditto, but also thaw all frozen messages,
3293 -Rr: String is regex
3294 -Rrf: Regex and force
3295 -Rrff: Regex and force and thaw
3296
3297 in all cases provided there are no further characters in this
3298 argument. */
3299
3300 if (*argrest != 0)
3301 {
3302 int i;
55e70e76 3303 for (i = 0; i < nelem(rsopts); i++)
059ec3d9
PH
3304 if (Ustrcmp(argrest, rsopts[i]) == 0)
3305 {
3306 if (i != 2) queue_run_force = TRUE;
3307 if (i >= 2) deliver_selectstring_regex = TRUE;
3308 if (i == 1 || i == 4) deliver_force_thaw = TRUE;
3309 argrest += Ustrlen(rsopts[i]);
3310 }
059ec3d9
PH
3311 }
3312
3313 /* -R: Set string to match in addresses for forced queue run to
3314 pick out particular messages. */
3315
55e70e76
JH
3316 if (*argrest)
3317 deliver_selectstring = argrest;
3318 else if (i+1 < argc)
3319 deliver_selectstring = argv[++i];
3320 else
059ec3d9 3321 {
55e70e76
JH
3322 fprintf(stderr, "exim: string expected after -R\n");
3323 exit(EXIT_FAILURE);
059ec3d9 3324 }
059ec3d9
PH
3325 break;
3326
3327
3328 /* -r: an obsolete synonym for -f (see above) */
3329
3330
3331 /* -S: Like -R but works on sender. */
3332
3333 case 'S': /* Synonymous with -qS... */
3334 receiving_message = FALSE;
3335
3336 /* -Sf: As -S (below) but force all deliveries,
3337 -Sff: Ditto, but also thaw all frozen messages,
3338 -Sr: String is regex
3339 -Srf: Regex and force
3340 -Srff: Regex and force and thaw
3341
3342 in all cases provided there are no further characters in this
3343 argument. */
3344
55e70e76 3345 if (*argrest)
059ec3d9
PH
3346 {
3347 int i;
55e70e76 3348 for (i = 0; i < nelem(rsopts); i++)
059ec3d9
PH
3349 if (Ustrcmp(argrest, rsopts[i]) == 0)
3350 {
3351 if (i != 2) queue_run_force = TRUE;
3352 if (i >= 2) deliver_selectstring_sender_regex = TRUE;
3353 if (i == 1 || i == 4) deliver_force_thaw = TRUE;
3354 argrest += Ustrlen(rsopts[i]);
3355 }
059ec3d9
PH
3356 }
3357
3358 /* -S: Set string to match in addresses for forced queue run to
3359 pick out particular messages. */
3360
55e70e76
JH
3361 if (*argrest)
3362 deliver_selectstring_sender = argrest;
3363 else if (i+1 < argc)
3364 deliver_selectstring_sender = argv[++i];
3365 else
059ec3d9 3366 {
55e70e76
JH
3367 fprintf(stderr, "exim: string expected after -S\n");
3368 exit(EXIT_FAILURE);
059ec3d9 3369 }
059ec3d9
PH
3370 break;
3371
3372 /* -Tqt is an option that is exclusively for use by the testing suite.
3373 It is not recognized in other circumstances. It allows for the setting up
3374 of explicit "queue times" so that various warning/retry things can be
3375 tested. Otherwise variability of clock ticks etc. cause problems. */
3376
3377 case 'T':
3378 if (running_in_test_harness && Ustrcmp(argrest, "qt") == 0)
3379 fudged_queue_times = argv[++i];
3380 else badarg = TRUE;
3381 break;
3382
3383
3384 /* -t: Set flag to extract recipients from body of message. */
3385
3386 case 't':
3387 if (*argrest == 0) extract_recipients = TRUE;
3388
3389 /* -ti: Set flag to extract recipients from body of message, and also
3390 specify that dot does not end the message. */
3391
3392 else if (Ustrcmp(argrest, "i") == 0)
3393 {
3394 extract_recipients = TRUE;
3395 dot_ends = FALSE;
3396 }
3397
3398 /* -tls-on-connect: don't wait for STARTTLS (for old clients) */
3399
3400 #ifdef SUPPORT_TLS
817d9f57 3401 else if (Ustrcmp(argrest, "ls-on-connect") == 0) tls_in.on_connect = TRUE;
059ec3d9
PH
3402 #endif
3403
3404 else badarg = TRUE;
3405 break;
3406
3407
3408 /* -U: This means "initial user submission" in sendmail, apparently. The
3409 doc claims that in future sendmail may refuse syntactically invalid
3410 messages instead of fixing them. For the moment, we just ignore it. */
3411
3412 case 'U':
3413 break;
3414
3415
3416 /* -v: verify things - this is a very low-level debugging */
3417
3418 case 'v':
3419 if (*argrest == 0)
3420 {
3421 debug_selector |= D_v;
3422 debug_file = stderr;
3423 }
3424 else badarg = TRUE;
3425 break;
3426
3427
3428 /* -x: AIX uses this to indicate some fancy 8-bit character stuff:
3429
3430 The -x flag tells the sendmail command that mail from a local
3431 mail program has National Language Support (NLS) extended characters
3432 in the body of the mail item. The sendmail command can send mail with
3433 extended NLS characters across networks that normally corrupts these
3434 8-bit characters.
3435
3436 As Exim is 8-bit clean, it just ignores this flag. */
3437
3438 case 'x':
3439 if (*argrest != 0) badarg = TRUE;
3440 break;
3441
a3fb9793
PP
3442 /* -X: in sendmail: takes one parameter, logfile, and sends debugging
3443 logs to that file. We swallow the parameter and otherwise ignore it. */
3444
3445 case 'X':
3446 if (*argrest == '\0')
a3fb9793
PP
3447 if (++i >= argc)
3448 {
3449 fprintf(stderr, "exim: string expected after -X\n");
3450 exit(EXIT_FAILURE);
3451 }
0ad2e0fc
JH
3452 break;
3453
3454 case 'z':
3455 if (*argrest == '\0')
3456 if (++i < argc) log_oneline = argv[i]; else
3457 {
3458 fprintf(stderr, "exim: file name expected after %s\n", argv[i-1]);
3459 exit(EXIT_FAILURE);
3460 }
a3fb9793
PP
3461 break;
3462
059ec3d9
PH
3463 /* All other initial characters are errors */
3464
3465 default:
3466 badarg = TRUE;
3467 break;
3468 } /* End of high-level switch statement */
3469
3470 /* Failed to recognize the option, or syntax error */
3471
3472 if (badarg)
3473 {
3474 fprintf(stderr, "exim abandoned: unknown, malformed, or incomplete "
3475 "option %s\n", arg);
3476 exit(EXIT_FAILURE);
3477 }
3478 }
3479
3480
3cc66b45
PH
3481/* If -R or -S have been specified without -q, assume a single queue run. */
3482
55e70e76
JH
3483if ( (deliver_selectstring || deliver_selectstring_sender)
3484 && queue_interval < 0)
3485 queue_interval = 0;
3cc66b45
PH
3486
3487
059ec3d9 3488END_ARG:
81ea09ca
NM
3489/* If usage_wanted is set we call the usage function - which never returns */
3490if (usage_wanted) exim_usage(called_as);
3491
3492/* Arguments have been processed. Check for incompatibilities. */
059ec3d9
PH
3493if ((
3494 (smtp_input || extract_recipients || recipients_arg < argc) &&
3495 (daemon_listen || queue_interval >= 0 || bi_option ||
3496 test_retry_arg >= 0 || test_rewrite_arg >= 0 ||
f05da2e8 3497 filter_test != FTEST_NONE || (msg_action_arg > 0 && !one_msg_action))
059ec3d9
PH
3498 ) ||
3499 (
3500 msg_action_arg > 0 &&
44915474 3501 (daemon_listen || queue_interval > 0 || list_options ||
0ef732d9
PH
3502 (checking && msg_action != MSG_LOAD) ||
3503 bi_option || test_retry_arg >= 0 || test_rewrite_arg >= 0)
059ec3d9
PH
3504 ) ||
3505 (
55e70e76 3506 (daemon_listen || queue_interval > 0) &&
059ec3d9 3507 (sender_address != NULL || list_options || list_queue || checking ||
0ef732d9 3508 bi_option)
059ec3d9
PH
3509 ) ||
3510 (
3511 daemon_listen && queue_interval == 0
3512 ) ||
3513 (
9ee44efb
PP
3514 inetd_wait_mode && queue_interval >= 0
3515 ) ||
3516 (
059ec3d9
PH
3517 list_options &&
3518 (checking || smtp_input || extract_recipients ||
f05da2e8 3519 filter_test != FTEST_NONE || bi_option)
059ec3d9
PH
3520 ) ||
3521 (
3522 verify_address_mode &&
3523 (address_test_mode || smtp_input || extract_recipients ||
f05da2e8 3524 filter_test != FTEST_NONE || bi_option)
059ec3d9
PH
3525 ) ||
3526 (
3527 address_test_mode && (smtp_input || extract_recipients ||
f05da2e8 3528 filter_test != FTEST_NONE || bi_option)
059ec3d9
PH
3529 ) ||
3530 (
f05da2e8 3531 smtp_input && (sender_address != NULL || filter_test != FTEST_NONE ||
059ec3d9
PH
3532 extract_recipients)
3533 ) ||
3534 (
3535 deliver_selectstring != NULL && queue_interval < 0
328895cc
PH
3536 ) ||
3537 (
3538 msg_action == MSG_LOAD &&
3539 (!expansion_test || expansion_test_message != NULL)
059ec3d9
PH
3540 )
3541 )
3542 {
3543 fprintf(stderr, "exim: incompatible command-line options or arguments\n");
3544 exit(EXIT_FAILURE);
3545 }
3546
3547/* If debugging is set up, set the file and the file descriptor to pass on to
3548child processes. It should, of course, be 2 for stderr. Also, force the daemon
3549to run in the foreground. */
3550
3551if (debug_selector != 0)
3552 {
3553 debug_file = stderr;
3554 debug_fd = fileno(debug_file);
3555 background_daemon = FALSE;
3556 if (running_in_test_harness) millisleep(100); /* lets caller finish */
3557 if (debug_selector != D_v) /* -v only doesn't show this */
3558 {
3559 debug_printf("Exim version %s uid=%ld gid=%ld pid=%d D=%x\n",
3560 version_string, (long int)real_uid, (long int)real_gid, (int)getpid(),
3561 debug_selector);
6545de78
PP
3562 if (!version_printed)
3563 show_whats_supported(stderr);
059ec3d9
PH
3564 }
3565 }
3566
3567/* When started with root privilege, ensure that the limits on the number of
3568open files and the number of processes (where that is accessible) are
3569sufficiently large, or are unset, in case Exim has been called from an
3570environment where the limits are screwed down. Not all OS have the ability to
3571change some of these limits. */
3572
3573if (unprivileged)
3574 {
3575 DEBUG(D_any) debug_print_ids(US"Exim has no root privilege:");
3576 }
3577else
3578 {
3579 struct rlimit rlp;
3580
3581 #ifdef RLIMIT_NOFILE
3582 if (getrlimit(RLIMIT_NOFILE, &rlp) < 0)
3583 {
3584 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NOFILE) failed: %s",
3585 strerror(errno));
3586 rlp.rlim_cur = rlp.rlim_max = 0;
3587 }
eb2c0248
PH
3588
3589 /* I originally chose 1000 as a nice big number that was unlikely to
a494b1e1
PH
3590 be exceeded. It turns out that some older OS have a fixed upper limit of
3591 256. */
eb2c0248 3592
059ec3d9
PH
3593 if (rlp.rlim_cur < 1000)
3594 {
3595 rlp.rlim_cur = rlp.rlim_max = 1000;
3596 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
eb2c0248 3597 {
a494b1e1
PH
3598 rlp.rlim_cur = rlp.rlim_max = 256;
3599 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
3600 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NOFILE) failed: %s",
3601 strerror(errno));
eb2c0248 3602 }
059ec3d9
PH
3603 }
3604 #endif
3605
3606 #ifdef RLIMIT_NPROC
3607 if (getrlimit(RLIMIT_NPROC, &rlp) < 0)
3608 {
3609 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NPROC) failed: %s",
3610 strerror(errno));
3611 rlp.rlim_cur = rlp.rlim_max = 0;
3612 }
3613
3614 #ifdef RLIM_INFINITY
3615 if (rlp.rlim_cur != RLIM_INFINITY && rlp.rlim_cur < 1000)
3616 {
3617 rlp.rlim_cur = rlp.rlim_max = RLIM_INFINITY;
3618 #else
3619 if (rlp.rlim_cur < 1000)
3620 {
3621 rlp.rlim_cur = rlp.rlim_max = 1000;
3622 #endif
3623 if (setrlimit(RLIMIT_NPROC, &rlp) < 0)
3624 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NPROC) failed: %s",
3625 strerror(errno));
3626 }
3627 #endif
3628 }
3629
3630/* Exim is normally entered as root (but some special configurations are
3631possible that don't do this). However, it always spins off sub-processes that
3632set their uid and gid as required for local delivery. We don't want to pass on
3633any extra groups that root may belong to, so we want to get rid of them all at
3634this point.
3635
3636We need to obey setgroups() at this stage, before possibly giving up root
3637privilege for a changed configuration file, but later on we might need to
3638check on the additional groups for the admin user privilege - can't do that
3639till after reading the config, which might specify the exim gid. Therefore,
3640save the group list here first. */
3641
3642group_count = getgroups(NGROUPS_MAX, group_list);
cd59ab18
PP
3643if (group_count < 0)
3644 {
3645 fprintf(stderr, "exim: getgroups() failed: %s\n", strerror(errno));
3646 exit(EXIT_FAILURE);
3647 }
059ec3d9
PH
3648
3649/* There is a fundamental difference in some BSD systems in the matter of
3650groups. FreeBSD and BSDI are known to be different; NetBSD and OpenBSD are
3651known not to be different. On the "different" systems there is a single group
3652list, and the first entry in it is the current group. On all other versions of
3653Unix there is a supplementary group list, which is in *addition* to the current
3654group. Consequently, to get rid of all extraneous groups on a "standard" system
3655you pass over 0 groups to setgroups(), while on a "different" system you pass
3656over a single group - the current group, which is always the first group in the
3657list. Calling setgroups() with zero groups on a "different" system results in
3658an error return. The following code should cope with both types of system.
3659
3660However, if this process isn't running as root, setgroups() can't be used
3661since you have to be root to run it, even if throwing away groups. Not being
3662root here happens only in some unusual configurations. We just ignore the
3663error. */
3664
3665if (setgroups(0, NULL) != 0)
3666 {
3667 if (setgroups(1, group_list) != 0 && !unprivileged)
3668 {
3669 fprintf(stderr, "exim: setgroups() failed: %s\n", strerror(errno));
3670 exit(EXIT_FAILURE);
3671 }
3672 }
3673
3674/* If the configuration file name has been altered by an argument on the
3675command line (either a new file name or a macro definition) and the caller is
cd25e41d
DW
3676not root, or if this is a filter testing run, remove any setuid privilege the
3677program has and run as the underlying user.
059ec3d9 3678
cd25e41d
DW
3679The exim user is locked out of this, which severely restricts the use of -C
3680for some purposes.
059ec3d9
PH
3681
3682Otherwise, set the real ids to the effective values (should be root unless run
3683from inetd, which it can either be root or the exim uid, if one is configured).
3684
3685There is a private mechanism for bypassing some of this, in order to make it
3686possible to test lots of configurations automatically, without having either to
3687recompile each time, or to patch in an actual configuration file name and other
3688values (such as the path name). If running in the test harness, pretend that
3689configuration file changes and macro definitions haven't happened. */
3690
3691if (( /* EITHER */
a7cbbf50 3692 (!trusted_config || /* Config changed, or */
a4034eb8 3693 !macros_trusted(opt_D_used)) && /* impermissible macros and */
059ec3d9 3694 real_uid != root_uid && /* Not root, and */
059ec3d9
PH
3695 !running_in_test_harness /* Not fudged */
3696 ) || /* OR */
3697 expansion_test /* expansion testing */
3698 || /* OR */
f05da2e8 3699 filter_test != FTEST_NONE) /* Filter testing */
059ec3d9
PH
3700 {
3701 setgroups(group_count, group_list);
3702 exim_setugid(real_uid, real_gid, FALSE,
3703 US"-C, -D, -be or -bf forces real uid");
3704 removed_privilege = TRUE;
3705
3706 /* In the normal case when Exim is called like this, stderr is available
3707 and should be used for any logging information because attempts to write
3708 to the log will usually fail. To arrange this, we unset really_exim. However,
3709 if no stderr is available there is no point - we might as well have a go
b7487bce 3710 at the log (if it fails, syslog will be written).
059ec3d9 3711
b7487bce
PP
3712 Note that if the invoker is Exim, the logs remain available. Messing with
3713 this causes unlogged successful deliveries. */
3714
3715 if ((log_stderr != NULL) && (real_uid != exim_uid))
3716 really_exim = FALSE;
059ec3d9
PH
3717 }
3718
3719/* Privilege is to be retained for the moment. It may be dropped later,
3720depending on the job that this Exim process has been asked to do. For now, set
3721the real uid to the effective so that subsequent re-execs of Exim are done by a
3722privileged user. */
3723
3724else exim_setugid(geteuid(), getegid(), FALSE, US"forcing real = effective");
3725
f05da2e8 3726/* If testing a filter, open the file(s) now, before wasting time doing other
059ec3d9
PH
3727setups and reading the message. */
3728
f05da2e8
PH
3729if ((filter_test & FTEST_SYSTEM) != 0)
3730 {
3731 filter_sfd = Uopen(filter_test_sfile, O_RDONLY, 0);
3732 if (filter_sfd < 0)
3733 {
3734 fprintf(stderr, "exim: failed to open %s: %s\n", filter_test_sfile,
3735 strerror(errno));
3736 return EXIT_FAILURE;
3737 }
3738 }
3739
3740if ((filter_test & FTEST_USER) != 0)
059ec3d9 3741 {
f05da2e8
PH
3742 filter_ufd = Uopen(filter_test_ufile, O_RDONLY, 0);
3743 if (filter_ufd < 0)
059ec3d9 3744 {
f05da2e8 3745 fprintf(stderr, "exim: failed to open %s: %s\n", filter_test_ufile,
059ec3d9
PH
3746 strerror(errno));
3747 return EXIT_FAILURE;
3748 }
3749 }
3750
8829633f
PP
3751/* Initialise lookup_list
3752If debugging, already called above via version reporting.
3753In either case, we initialise the list of available lookups while running
3754as root. All dynamically modules are loaded from a directory which is
3755hard-coded into the binary and is code which, if not a module, would be
3756part of Exim already. Ability to modify the content of the directory
3757is equivalent to the ability to modify a setuid binary!
3758
3759This needs to happen before we read the main configuration. */
3760init_lookup_list();
3761
8c5d388a 3762#ifdef SUPPORT_I18N
9d4319df
JH
3763if (running_in_test_harness) smtputf8_advertise_hosts = NULL;
3764#endif
3765
059ec3d9
PH
3766/* Read the main runtime configuration data; this gives up if there
3767is a failure. It leaves the configuration file open so that the subsequent
3de973a2 3768configuration data for delivery can be read if needed.
059ec3d9 3769
3de973a2
HSHR
3770NOTE: immediatly after opening the configuration file we change the working
3771directory to "/"! Later we change to $spool_directory. We do it there, because
3772during readconf_main() some expansion takes place already. */
bc3c7bb7 3773
cd328be9
JH
3774/* Store the initial cwd before we change directories. Can be NULL if the
3775dir has already been unlinked. */
3776initial_cwd = os_getcwd(NULL, 0);
3615fa9a 3777
34e86e20
HSHR
3778/* checking:
3779 -be[m] expansion test -
3780 -b[fF] filter test new
3781 -bh[c] host test -
3782 -bmalware malware_test_file new
3783 -brt retry test new
3784 -brw rewrite test new
3785 -bt address test -
3786 -bv[s] address verify -
3787 list_options:
3788 -bP <option> (except -bP config, which sets list_config)
3789
3790If any of these options is set, we suppress warnings about configuration
3791issues (currently about tls_advertise_hosts and keep_environment not being
3792defined) */
3793
3794readconf_main(checking || list_options);
059ec3d9 3795
32b8ce41 3796
3de973a2
HSHR
3797/* Now in directory "/" */
3798
bc3c7bb7
HSHR
3799if (cleanup_environment() == FALSE)
3800 log_write(0, LOG_PANIC_DIE, "Can't cleanup environment");
3801
3802
a3fb9793
PP
3803/* If an action on specific messages is requested, or if a daemon or queue
3804runner is being started, we need to know if Exim was called by an admin user.
3805This is the case if the real user is root or exim, or if the real group is
3806exim, or if one of the supplementary groups is exim or a group listed in
3807admin_groups. We don't fail all message actions immediately if not admin_user,
3808since some actions can be performed by non-admin users. Instead, set admin_user
3809for later interrogation. */
3810
3811if (real_uid == root_uid || real_uid == exim_uid || real_gid == exim_gid)
3812 admin_user = TRUE;
3813else
3814 {
3815 int i, j;
32b8ce41
JH
3816 for (i = 0; i < group_count && !admin_user; i++)
3817 if (group_list[i] == exim_gid)
3818 admin_user = TRUE;
3819 else if (admin_groups)
3820 for (j = 1; j <= (int)admin_groups[0] && !admin_user; j++)
a3fb9793 3821 if (admin_groups[j] == group_list[i])
32b8ce41 3822 admin_user = TRUE;
a3fb9793
PP
3823 }
3824
3825/* Another group of privileged users are the trusted users. These are root,
3826exim, and any caller matching trusted_users or trusted_groups. Trusted callers
3827are permitted to specify sender_addresses with -f on the command line, and
3828other message parameters as well. */
3829
3830if (real_uid == root_uid || real_uid == exim_uid)
3831 trusted_caller = TRUE;
3832else
3833 {
3834 int i, j;
3835
32b8ce41
JH
3836 if (trusted_users)
3837 for (i = 1; i <= (int)trusted_users[0] && !trusted_caller; i++)
a3fb9793 3838 if (trusted_users[i] == real_uid)
32b8ce41 3839 trusted_caller = TRUE;
a3fb9793 3840
32b8ce41
JH
3841 if (trusted_groups)
3842 for (i = 1; i <= (int)trusted_groups[0] && !trusted_caller; i++)
a3fb9793
PP
3843 if (trusted_groups[i] == real_gid)
3844 trusted_caller = TRUE;
32b8ce41 3845 else for (j = 0; j < group_count && !trusted_caller; j++)
a3fb9793 3846 if (trusted_groups[i] == group_list[j])
32b8ce41 3847 trusted_caller = TRUE;
a3fb9793
PP
3848 }
3849
f33875c3 3850/* At this point, we know if the user is privileged and some command-line
b4a1e238 3851options become possibly impermissible, depending upon the configuration file. */
f33875c3
PP
3852
3853if (checking && commandline_checks_require_admin && !admin_user) {
3854 fprintf(stderr, "exim: those command-line flags are set to require admin\n");
3855 exit(EXIT_FAILURE);
3856}
3857
059ec3d9
PH
3858/* Handle the decoding of logging options. */
3859
6c6d6e48 3860decode_bits(log_selector, log_selector_size, log_notall,
ed7f7860 3861 log_selector_string, log_options, log_options_count, US"log", 0);
059ec3d9
PH
3862
3863DEBUG(D_any)
3864 {
6c6d6e48 3865 int i;