Handle kernels not providing microsecond time resolution
[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__)
01f3091a
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16# include <gnu/libc-version.h>
17#endif
18
f797c123
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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
6545de78
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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{
f3ebb786
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45/* For now, regard all RE results as potentially tainted. We might need
46more intelligence on this point. */
47return store_get((int)size, TRUE);
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48}
49
50static void
51function_dummy_free(void *block) { block = block; }
52
53static void *
54function_store_malloc(size_t size)
55{
56return store_malloc((int)size);
57}
58
59static void
60function_store_free(void *block)
61{
62store_free(block);
63}
64
65
66
67
68/*************************************************
98a90c36
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69* Enums for cmdline interface *
70*************************************************/
71
72enum commandline_info { CMDINFO_NONE=0,
36a3ae5f 73 CMDINFO_HELP, CMDINFO_SIEVE, CMDINFO_DSCP };
98a90c36
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74
75
76
77
78/*************************************************
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79* Compile regular expression and panic on fail *
80*************************************************/
81
82/* This function is called when failure to compile a regular expression leads
83to a panic exit. In other cases, pcre_compile() is called directly. In many
84cases where this function is used, the results of the compilation are to be
85placed in long-lived store, so we temporarily reset the store management
86functions that PCRE uses if the use_malloc flag is set.
87
88Argument:
89 pattern the pattern to compile
90 caseless TRUE if caseless matching is required
91 use_malloc TRUE if compile into malloc store
92
93Returns: pointer to the compiled pattern
94*/
95
96const pcre *
476be7e2 97regex_must_compile(const uschar *pattern, BOOL caseless, BOOL use_malloc)
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98{
99int offset;
100int options = PCRE_COPT;
101const pcre *yield;
102const uschar *error;
103if (use_malloc)
104 {
105 pcre_malloc = function_store_malloc;
106 pcre_free = function_store_free;
107 }
108if (caseless) options |= PCRE_CASELESS;
476be7e2 109yield = pcre_compile(CCS pattern, options, (const char **)&error, &offset, NULL);
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110pcre_malloc = function_store_get;
111pcre_free = function_dummy_free;
112if (yield == NULL)
113 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "regular expression error: "
114 "%s at offset %d while compiling %s", error, offset, pattern);
115return yield;
116}
117
118
119
120
121/*************************************************
122* Execute regular expression and set strings *
123*************************************************/
124
125/* This function runs a regular expression match, and sets up the pointers to
126the matched substrings.
127
128Arguments:
129 re the compiled expression
130 subject the subject string
131 options additional PCRE options
132 setup if < 0 do full setup
133 if >= 0 setup from setup+1 onwards,
134 excluding the full matched string
135
136Returns: TRUE or FALSE
137*/
138
139BOOL
1dc92d5a 140regex_match_and_setup(const pcre *re, const uschar *subject, int options, int setup)
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141{
142int ovector[3*(EXPAND_MAXN+1)];
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143uschar * s = string_copy(subject); /* de-constifying */
144int n = pcre_exec(re, NULL, CS s, Ustrlen(s), 0,
ee8b8090 145 PCRE_EOPT | options, ovector, nelem(ovector));
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146BOOL yield = n >= 0;
147if (n == 0) n = EXPAND_MAXN + 1;
148if (yield)
149 {
ee8b8090 150 expand_nmax = setup < 0 ? 0 : setup + 1;
d7978c0f 151 for (int nn = setup < 0 ? 0 : 2; nn < n*2; nn += 2)
059ec3d9 152 {
1dc92d5a 153 expand_nstring[expand_nmax] = s + ovector[nn];
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154 expand_nlength[expand_nmax++] = ovector[nn+1] - ovector[nn];
155 }
156 expand_nmax--;
157 }
158return yield;
159}
160
161
162
163
164/*************************************************
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165* Set up processing details *
166*************************************************/
167
168/* Save a text string for dumping when SIGUSR1 is received.
169Do checks for overruns.
170
171Arguments: format and arguments, as for printf()
172Returns: nothing
173*/
174
175void
176set_process_info(const char *format, ...)
177{
d12746bc
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178gstring gs = { .size = PROCESS_INFO_SIZE - 2, .ptr = 0, .s = process_info };
179gstring * g;
180int len;
921b12ca 181va_list ap;
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182
183g = string_fmt_append(&gs, "%5d ", (int)getpid());
184len = g->ptr;
921b12ca 185va_start(ap, format);
f3ebb786 186if (!string_vformat(g, 0, format, ap))
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187 {
188 gs.ptr = len;
189 g = string_cat(&gs, US"**** string overflowed buffer ****");
190 }
191g = string_catn(g, US"\n", 1);
192string_from_gstring(g);
193process_info_len = g->ptr;
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194DEBUG(D_process_info) debug_printf("set_process_info: %s", process_info);
195va_end(ap);
196}
197
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198/***********************************************
199* Handler for SIGTERM *
200***********************************************/
921b12ca 201
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202static void
203term_handler(int sig)
204{
01446a56 205exit(1);
830832c9 206}
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207
208
209/*************************************************
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210* Handler for SIGUSR1 *
211*************************************************/
212
213/* SIGUSR1 causes any exim process to write to the process log details of
214what it is currently doing. It will only be used if the OS is capable of
215setting up a handler that causes automatic restarting of any system call
216that is in progress at the time.
217
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218This function takes care to be signal-safe.
219
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220Argument: the signal number (SIGUSR1)
221Returns: nothing
222*/
223
224static void
225usr1_handler(int sig)
226{
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227int fd;
228
229os_restarting_signal(sig, usr1_handler);
230
cab0c277 231if ((fd = Uopen(process_log_path, O_APPEND|O_WRONLY, LOG_MODE)) < 0)
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232 {
233 /* If we are already running as the Exim user, try to create it in the
234 current process (assuming spool_directory exists). Otherwise, if we are
235 root, do the creation in an exim:exim subprocess. */
236
237 int euid = geteuid();
238 if (euid == exim_uid)
239 fd = Uopen(process_log_path, O_CREAT|O_APPEND|O_WRONLY, LOG_MODE);
240 else if (euid == root_uid)
241 fd = log_create_as_exim(process_log_path);
242 }
243
244/* If we are neither exim nor root, or if we failed to create the log file,
245give up. There is not much useful we can do with errors, since we don't want
246to disrupt whatever is going on outside the signal handler. */
247
248if (fd < 0) return;
249
2f21487f 250(void)write(fd, process_info, process_info_len);
921b12ca 251(void)close(fd);
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252}
253
254
255
256/*************************************************
257* Timeout handler *
258*************************************************/
259
260/* This handler is enabled most of the time that Exim is running. The handler
261doesn't actually get used unless alarm() has been called to set a timer, to
262place a time limit on a system call of some kind. When the handler is run, it
263re-enables itself.
264
265There are some other SIGALRM handlers that are used in special cases when more
266than just a flag setting is required; for example, when reading a message's
267input. These are normally set up in the code module that uses them, and the
268SIGALRM handler is reset to this one afterwards.
269
270Argument: the signal value (SIGALRM)
271Returns: nothing
272*/
273
274void
275sigalrm_handler(int sig)
276{
277sig = sig; /* Keep picky compilers happy */
278sigalrm_seen = TRUE;
279os_non_restarting_signal(SIGALRM, sigalrm_handler);
280}
281
282
283
284/*************************************************
285* Sleep for a fractional time interval *
286*************************************************/
287
288/* This function is called by millisleep() and exim_wait_tick() to wait for a
289period of time that may include a fraction of a second. The coding is somewhat
eb2c0248
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290tedious. We do not expect setitimer() ever to fail, but if it does, the process
291will wait for ever, so we panic in this instance. (There was a case of this
292when a bug in a function that calls milliwait() caused it to pass invalid data.
7086e875 293That's when I added the check. :-)
059ec3d9 294
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295We assume it to be not worth sleeping for under 100us; this value will
296require revisiting as hardware advances. This avoids the issue of
297a zero-valued timer setting meaning "never fire".
298
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299Argument: an itimerval structure containing the interval
300Returns: nothing
301*/
302
303static void
304milliwait(struct itimerval *itval)
305{
306sigset_t sigmask;
307sigset_t old_sigmask;
0f8ba377
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308
309if (itval->it_value.tv_usec < 100 && itval->it_value.tv_sec == 0)
310 return;
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311(void)sigemptyset(&sigmask); /* Empty mask */
312(void)sigaddset(&sigmask, SIGALRM); /* Add SIGALRM */
313(void)sigprocmask(SIG_BLOCK, &sigmask, &old_sigmask); /* Block SIGALRM */
7086e875 314if (setitimer(ITIMER_REAL, itval, NULL) < 0) /* Start timer */
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315 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
316 "setitimer() failed: %s", strerror(errno));
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317(void)sigfillset(&sigmask); /* All signals */
318(void)sigdelset(&sigmask, SIGALRM); /* Remove SIGALRM */
319(void)sigsuspend(&sigmask); /* Until SIGALRM */
320(void)sigprocmask(SIG_SETMASK, &old_sigmask, NULL); /* Restore mask */
321}
322
323
324
325
326/*************************************************
327* Millisecond sleep function *
328*************************************************/
329
330/* The basic sleep() function has a granularity of 1 second, which is too rough
331in some cases - for example, when using an increasing delay to slow down
332spammers.
333
334Argument: number of millseconds
335Returns: nothing
336*/
337
338void
339millisleep(int msec)
340{
341struct itimerval itval;
342itval.it_interval.tv_sec = 0;
343itval.it_interval.tv_usec = 0;
344itval.it_value.tv_sec = msec/1000;
345itval.it_value.tv_usec = (msec % 1000) * 1000;
346milliwait(&itval);
347}
348
349
350
351/*************************************************
352* Compare microsecond times *
353*************************************************/
354
355/*
356Arguments:
357 tv1 the first time
358 tv2 the second time
359
360Returns: -1, 0, or +1
361*/
362
32dfdf8b 363static int
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364exim_tvcmp(struct timeval *t1, struct timeval *t2)
365{
366if (t1->tv_sec > t2->tv_sec) return +1;
367if (t1->tv_sec < t2->tv_sec) return -1;
368if (t1->tv_usec > t2->tv_usec) return +1;
369if (t1->tv_usec < t2->tv_usec) return -1;
370return 0;
371}
372
373
374
375
376/*************************************************
377* Clock tick wait function *
378*************************************************/
379
380/* Exim uses a time + a pid to generate a unique identifier in two places: its
381message IDs, and in file names for maildir deliveries. Because some OS now
382re-use pids within the same second, sub-second times are now being used.
4c04137d 383However, for absolute certainty, we must ensure the clock has ticked before
059ec3d9
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384allowing the relevant process to complete. At the time of implementation of
385this code (February 2003), the speed of processors is such that the clock will
386invariably have ticked already by the time a process has done its job. This
387function prepares for the time when things are faster - and it also copes with
388clocks that go backwards.
389
390Arguments:
391 then_tv A timeval which was used to create uniqueness; its usec field
392 has been rounded down to the value of the resolution.
393 We want to be sure the current time is greater than this.
394 resolution The resolution that was used to divide the microseconds
395 (1 for maildir, larger for message ids)
396
397Returns: nothing
398*/
399
400void
401exim_wait_tick(struct timeval *then_tv, int resolution)
402{
403struct timeval now_tv;
404long int now_true_usec;
405
406(void)gettimeofday(&now_tv, NULL);
407now_true_usec = now_tv.tv_usec;
408now_tv.tv_usec = (now_true_usec/resolution) * resolution;
409
fce5c23c 410while (exim_tvcmp(&now_tv, then_tv) <= 0)
059ec3d9
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411 {
412 struct itimerval itval;
413 itval.it_interval.tv_sec = 0;
414 itval.it_interval.tv_usec = 0;
415 itval.it_value.tv_sec = then_tv->tv_sec - now_tv.tv_sec;
416 itval.it_value.tv_usec = then_tv->tv_usec + resolution - now_true_usec;
417
418 /* We know that, overall, "now" is less than or equal to "then". Therefore, a
419 negative value for the microseconds is possible only in the case when "now"
420 is more than a second less than "then". That means that itval.it_value.tv_sec
421 is greater than zero. The following correction is therefore safe. */
422
423 if (itval.it_value.tv_usec < 0)
424 {
425 itval.it_value.tv_usec += 1000000;
426 itval.it_value.tv_sec -= 1;
427 }
428
429 DEBUG(D_transport|D_receive)
430 {
8768d548 431 if (!f.running_in_test_harness)
059ec3d9 432 {
d0291a0a 433 debug_printf("tick check: " TIME_T_FMT ".%06lu " TIME_T_FMT ".%06lu\n",
7437665e
JH
434 then_tv->tv_sec, (long) then_tv->tv_usec,
435 now_tv.tv_sec, (long) now_tv.tv_usec);
d0291a0a
JH
436 debug_printf("waiting " TIME_T_FMT ".%06lu\n",
437 itval.it_value.tv_sec, (long) itval.it_value.tv_usec);
059ec3d9
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438 }
439 }
440
441 milliwait(&itval);
fce5c23c
ST
442
443 /* Be prapared to go around if the kernel does not implement subtick
444 granularity (GNU Hurd) */
445
446 (void)gettimeofday(&now_tv, NULL);
447 now_true_usec = now_tv.tv_usec;
448 now_tv.tv_usec = (now_true_usec/resolution) * resolution;
059ec3d9
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449 }
450}
451
452
453
454
455/*************************************************
2632889e
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456* Call fopen() with umask 777 and adjust mode *
457*************************************************/
458
459/* Exim runs with umask(0) so that files created with open() have the mode that
460is specified in the open() call. However, there are some files, typically in
461the spool directory, that are created with fopen(). They end up world-writeable
462if no precautions are taken. Although the spool directory is not accessible to
463the world, this is an untidiness. So this is a wrapper function for fopen()
464that sorts out the mode of the created file.
465
466Arguments:
467 filename the file name
468 options the fopen() options
469 mode the required mode
470
471Returns: the fopened FILE or NULL
472*/
473
474FILE *
1ba28e2b 475modefopen(const uschar *filename, const char *options, mode_t mode)
2632889e 476{
67d175de
PH
477mode_t saved_umask = umask(0777);
478FILE *f = Ufopen(filename, options);
479(void)umask(saved_umask);
2632889e
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480if (f != NULL) (void)fchmod(fileno(f), mode);
481return f;
482}
483
484
2632889e 485/*************************************************
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486* Ensure stdin, stdout, and stderr exist *
487*************************************************/
488
489/* Some operating systems grumble if an exec() happens without a standard
490input, output, and error (fds 0, 1, 2) being defined. The worry is that some
491file will be opened and will use these fd values, and then some other bit of
492code will assume, for example, that it can write error messages to stderr.
493This function ensures that fds 0, 1, and 2 are open if they do not already
494exist, by connecting them to /dev/null.
495
496This function is also used to ensure that std{in,out,err} exist at all times,
497so that if any library that Exim calls tries to use them, it doesn't crash.
498
499Arguments: None
500Returns: Nothing
501*/
502
503void
504exim_nullstd(void)
505{
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506int devnull = -1;
507struct stat statbuf;
d7978c0f 508for (int i = 0; i <= 2; i++)
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509 {
510 if (fstat(i, &statbuf) < 0 && errno == EBADF)
511 {
512 if (devnull < 0) devnull = open("/dev/null", O_RDWR);
513 if (devnull < 0) log_write(0, LOG_MAIN|LOG_PANIC_DIE, "%s",
f3ebb786 514 string_open_failed(errno, "/dev/null", NULL));
1fe64dcc 515 if (devnull != i) (void)dup2(devnull, i);
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516 }
517 }
1fe64dcc 518if (devnull > 2) (void)close(devnull);
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519}
520
521
522
523
524/*************************************************
525* Close unwanted file descriptors for delivery *
526*************************************************/
527
528/* This function is called from a new process that has been forked to deliver
529an incoming message, either directly, or using exec.
530
531We want any smtp input streams to be closed in this new process. However, it
532has been observed that using fclose() here causes trouble. When reading in -bS
533input, duplicate copies of messages have been seen. The files will be sharing a
534file pointer with the parent process, and it seems that fclose() (at least on
535some systems - I saw this on Solaris 2.5.1) messes with that file pointer, at
536least sometimes. Hence we go for closing the underlying file descriptors.
537
538If TLS is active, we want to shut down the TLS library, but without molesting
539the parent's SSL connection.
540
541For delivery of a non-SMTP message, we want to close stdin and stdout (and
542stderr unless debugging) because the calling process might have set them up as
543pipes and be waiting for them to close before it waits for the submission
544process to terminate. If they aren't closed, they hold up the calling process
545until the initial delivery process finishes, which is not what we want.
546
547Exception: We do want it for synchronous delivery!
548
549And notwithstanding all the above, if D_resolver is set, implying resolver
550debugging, leave stdout open, because that's where the resolver writes its
551debugging output.
552
553When we close stderr (which implies we've also closed stdout), we also get rid
554of any controlling terminal.
555
556Arguments: None
557Returns: Nothing
558*/
559
560static void
561close_unwanted(void)
562{
563if (smtp_input)
564 {
01603eec 565#ifndef DISABLE_TLS
74f1a423
JH
566 tls_close(NULL, TLS_NO_SHUTDOWN); /* Shut down the TLS library */
567#endif
1fe64dcc
PH
568 (void)close(fileno(smtp_in));
569 (void)close(fileno(smtp_out));
059ec3d9
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570 smtp_in = NULL;
571 }
572else
573 {
1fe64dcc
PH
574 (void)close(0); /* stdin */
575 if ((debug_selector & D_resolver) == 0) (void)close(1); /* stdout */
576 if (debug_selector == 0) /* stderr */
059ec3d9 577 {
8768d548 578 if (!f.synchronous_delivery)
059ec3d9 579 {
1fe64dcc 580 (void)close(2);
059ec3d9
PH
581 log_stderr = NULL;
582 }
583 (void)setsid();
584 }
585 }
586}
587
588
589
590
591/*************************************************
592* Set uid and gid *
593*************************************************/
594
595/* This function sets a new uid and gid permanently, optionally calling
596initgroups() to set auxiliary groups. There are some special cases when running
597Exim in unprivileged modes. In these situations the effective uid will not be
598root; if we already have the right effective uid/gid, and don't need to
599initialize any groups, leave things as they are.
600
601Arguments:
602 uid the uid
603 gid the gid
604 igflag TRUE if initgroups() wanted
605 msg text to use in debugging output and failure log
606
607Returns: nothing; bombs out on failure
608*/
609
610void
611exim_setugid(uid_t uid, gid_t gid, BOOL igflag, uschar *msg)
612{
613uid_t euid = geteuid();
614gid_t egid = getegid();
615
616if (euid == root_uid || euid != uid || egid != gid || igflag)
617 {
618 /* At least one OS returns +1 for initgroups failure, so just check for
619 non-zero. */
620
621 if (igflag)
622 {
623 struct passwd *pw = getpwuid(uid);
9af3c549
JH
624 if (!pw)
625 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "cannot run initgroups(): "
626 "no passwd entry for uid=%ld", (long int)uid);
627
628 if (initgroups(pw->pw_name, gid) != 0)
629 log_write(0,LOG_MAIN|LOG_PANIC_DIE,"initgroups failed for uid=%ld: %s",
630 (long int)uid, strerror(errno));
059ec3d9
PH
631 }
632
633 if (setgid(gid) < 0 || setuid(uid) < 0)
059ec3d9
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634 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "unable to set gid=%ld or uid=%ld "
635 "(euid=%ld): %s", (long int)gid, (long int)uid, (long int)euid, msg);
059ec3d9
PH
636 }
637
638/* Debugging output included uid/gid and all groups */
639
640DEBUG(D_uid)
641 {
cd59ab18 642 int group_count, save_errno;
157d73b5 643 gid_t group_list[EXIM_GROUPLIST_SIZE];
059ec3d9
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644 debug_printf("changed uid/gid: %s\n uid=%ld gid=%ld pid=%ld\n", msg,
645 (long int)geteuid(), (long int)getegid(), (long int)getpid());
157d73b5 646 group_count = getgroups(nelem(group_list), group_list);
cd59ab18 647 save_errno = errno;
059ec3d9
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648 debug_printf(" auxiliary group list:");
649 if (group_count > 0)
d7978c0f 650 for (int i = 0; i < group_count; i++) debug_printf(" %d", (int)group_list[i]);
cd59ab18
PP
651 else if (group_count < 0)
652 debug_printf(" <error: %s>", strerror(save_errno));
059ec3d9
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653 else debug_printf(" <none>");
654 debug_printf("\n");
655 }
656}
657
658
659
660
661/*************************************************
662* Exit point *
663*************************************************/
664
665/* Exim exits via this function so that it always clears up any open
666databases.
667
668Arguments:
669 rc return code
670
671Returns: does not return
672*/
673
674void
9bfb7e1b 675exim_exit(int rc, const uschar * process)
059ec3d9
PH
676{
677search_tidyup();
f3ebb786 678store_exit();
059ec3d9 679DEBUG(D_any)
9bfb7e1b
JH
680 debug_printf(">>>>>>>>>>>>>>>> Exim pid=%d %s%s%sterminating with rc=%d "
681 ">>>>>>>>>>>>>>>>\n", (int)getpid(),
682 process ? "(" : "", process, process ? ") " : "", rc);
059ec3d9
PH
683exit(rc);
684}
685
686
f3ebb786
JH
687void
688exim_underbar_exit(int rc)
689{
690store_exit();
691_exit(rc);
692}
693
694
059ec3d9 695
9af3c549
JH
696/* Print error string, then die */
697static void
698exim_fail(const char * fmt, ...)
699{
700va_list ap;
701va_start(ap, fmt);
702vfprintf(stderr, fmt, ap);
703exit(EXIT_FAILURE);
704}
705
b66fecb4
HSHR
706/* exim_chown_failure() called from exim_chown()/exim_fchown() on failure
707of chown()/fchown(). See src/functions.h for more explanation */
708int
709exim_chown_failure(int fd, const uschar *name, uid_t owner, gid_t group)
710{
ecf14f2a 711int saved_errno = errno; /* from the preceeding chown call */
b66fecb4
HSHR
712#if 1
713log_write(0, LOG_MAIN|LOG_PANIC,
714 __FILE__ ":%d: chown(%s, %d:%d) failed (%s)."
715 " Please contact the authors and refer to https://bugs.exim.org/show_bug.cgi?id=2391",
716 __LINE__, name?name:US"<unknown>", owner, group, strerror(errno));
717#else
718/* I leave this here, commented, in case the "bug"(?) comes up again.
719 It is not an Exim bug, but we can provide a workaround.
720 See Bug 2391
721 HS 2019-04-18 */
722
b66fecb4
HSHR
723struct stat buf;
724
725if (0 == (fd < 0 ? stat(name, &buf) : fstat(fd, &buf)))
726{
727 if (buf.st_uid == owner && buf.st_gid == group) return 0;
728 log_write(0, LOG_MAIN|LOG_PANIC, "Wrong ownership on %s", name);
729}
730else log_write(0, LOG_MAIN|LOG_PANIC, "Stat failed on %s: %s", name, strerror(errno));
731
ecf14f2a 732#endif
b66fecb4
HSHR
733errno = saved_errno;
734return -1;
b66fecb4 735}
9af3c549 736
059ec3d9
PH
737
738/*************************************************
739* Extract port from host address *
740*************************************************/
741
742/* Called to extract the port from the values given to -oMa and -oMi.
b90c388a
PH
743It also checks the syntax of the address, and terminates it before the
744port data when a port is extracted.
059ec3d9
PH
745
746Argument:
747 address the address, with possible port on the end
748
749Returns: the port, or zero if there isn't one
750 bombs out on a syntax error
751*/
752
753static int
754check_port(uschar *address)
755{
7cd1141b 756int port = host_address_extract_port(address);
8e669ac1 757if (string_is_ip_address(address, NULL) == 0)
9af3c549 758 exim_fail("exim abandoned: \"%s\" is not an IP address\n", address);
059ec3d9
PH
759return port;
760}
761
762
763
764/*************************************************
765* Test/verify an address *
766*************************************************/
767
768/* This function is called by the -bv and -bt code. It extracts a working
769address from a full RFC 822 address. This isn't really necessary per se, but it
770has the effect of collapsing source routes.
771
772Arguments:
773 s the address string
774 flags flag bits for verify_address()
775 exit_value to be set for failures
776
a5a28604 777Returns: nothing
059ec3d9
PH
778*/
779
780static void
781test_address(uschar *s, int flags, int *exit_value)
782{
783int start, end, domain;
784uschar *parse_error = NULL;
785uschar *address = parse_extract_address(s, &parse_error, &start, &end, &domain,
786 FALSE);
787if (address == NULL)
788 {
789 fprintf(stdout, "syntax error: %s\n", parse_error);
790 *exit_value = 2;
791 }
792else
793 {
794 int rc = verify_address(deliver_make_addr(address,TRUE), stdout, flags, -1,
4deaf07d 795 -1, -1, NULL, NULL, NULL);
059ec3d9
PH
796 if (rc == FAIL) *exit_value = 2;
797 else if (rc == DEFER && *exit_value == 0) *exit_value = 1;
798 }
799}
800
801
802
803/*************************************************
059ec3d9
PH
804* Show supported features *
805*************************************************/
806
059ec3d9 807static void
96508de1 808show_db_version(FILE * f)
059ec3d9
PH
809{
810#ifdef DB_VERSION_STRING
96508de1
JH
811DEBUG(D_any)
812 {
813 fprintf(f, "Library version: BDB: Compile: %s\n", DB_VERSION_STRING);
814 fprintf(f, " Runtime: %s\n",
815 db_version(NULL, NULL, NULL));
816 }
817else
818 fprintf(f, "Berkeley DB: %s\n", DB_VERSION_STRING);
819
059ec3d9
PH
820#elif defined(BTREEVERSION) && defined(HASHVERSION)
821 #ifdef USE_DB
822 fprintf(f, "Probably Berkeley DB version 1.8x (native mode)\n");
823 #else
824 fprintf(f, "Probably Berkeley DB version 1.8x (compatibility mode)\n");
825 #endif
96508de1 826
059ec3d9
PH
827#elif defined(_DBM_RDONLY) || defined(dbm_dirfno)
828fprintf(f, "Probably ndbm\n");
829#elif defined(USE_TDB)
830fprintf(f, "Using tdb\n");
831#else
832 #ifdef USE_GDBM
833 fprintf(f, "Probably GDBM (native mode)\n");
834 #else
835 fprintf(f, "Probably GDBM (compatibility mode)\n");
836 #endif
837#endif
96508de1
JH
838}
839
840
841/* This function is called for -bV/--version and for -d to output the optional
842features of the current Exim binary.
843
844Arguments: a FILE for printing
845Returns: nothing
846*/
847
848static void
8768d548 849show_whats_supported(FILE * fp)
96508de1 850{
8768d548 851DEBUG(D_any) {} else show_db_version(fp);
059ec3d9 852
8768d548 853fprintf(fp, "Support for:");
9cec981f 854#ifdef SUPPORT_CRYPTEQ
8768d548 855 fprintf(fp, " crypteq");
9cec981f 856#endif
059ec3d9 857#if HAVE_ICONV
8768d548 858 fprintf(fp, " iconv()");
059ec3d9
PH
859#endif
860#if HAVE_IPV6
8768d548 861 fprintf(fp, " IPv6");
059ec3d9 862#endif
79378e0f 863#ifdef HAVE_SETCLASSRESOURCES
8768d548 864 fprintf(fp, " use_setclassresources");
929ba01c 865#endif
059ec3d9 866#ifdef SUPPORT_PAM
8768d548 867 fprintf(fp, " PAM");
059ec3d9
PH
868#endif
869#ifdef EXIM_PERL
8768d548 870 fprintf(fp, " Perl");
059ec3d9 871#endif
1a46a8c5 872#ifdef EXPAND_DLFUNC
8768d548 873 fprintf(fp, " Expand_dlfunc");
1a46a8c5 874#endif
059ec3d9 875#ifdef USE_TCP_WRAPPERS
8768d548 876 fprintf(fp, " TCPwrappers");
059ec3d9 877#endif
de517fd3 878#ifdef USE_GNUTLS
8768d548 879 fprintf(fp, " GnuTLS");
de517fd3
JH
880#endif
881#ifdef USE_OPENSSL
8768d548 882 fprintf(fp, " OpenSSL");
059ec3d9 883#endif
b2f5a032 884#ifdef SUPPORT_TRANSLATE_IP_ADDRESS
8768d548 885 fprintf(fp, " translate_ip_address");
b2f5a032 886#endif
f174f16e 887#ifdef SUPPORT_MOVE_FROZEN_MESSAGES
8768d548 888 fprintf(fp, " move_frozen_messages");
f174f16e 889#endif
8523533c 890#ifdef WITH_CONTENT_SCAN
8768d548 891 fprintf(fp, " Content_Scanning");
8523533c 892#endif
c0635b6d 893#ifdef SUPPORT_DANE
8768d548 894 fprintf(fp, " DANE");
c0635b6d 895#endif
74f150bf 896#ifndef DISABLE_DKIM
8768d548 897 fprintf(fp, " DKIM");
74f150bf 898#endif
ef1bbb27 899#ifndef DISABLE_DNSSEC
8768d548 900 fprintf(fp, " DNSSEC");
ef1bbb27 901#endif
0cbf2b82 902#ifndef DISABLE_EVENT
8768d548 903 fprintf(fp, " Event");
0cbf2b82 904#endif
8c5d388a 905#ifdef SUPPORT_I18N
8768d548 906 fprintf(fp, " I18N");
8c5d388a 907#endif
74f150bf 908#ifndef DISABLE_OCSP
8768d548 909 fprintf(fp, " OCSP");
74f150bf 910#endif
81344b40 911#ifndef DISABLE_PIPE_CONNECT
4e48d56c
JH
912 fprintf(fp, " PIPE_CONNECT");
913#endif
4d832da1 914#ifndef DISABLE_PRDR
8768d548 915 fprintf(fp, " PRDR");
4d832da1 916#endif
cee5f132 917#ifdef SUPPORT_PROXY
8768d548 918 fprintf(fp, " PROXY");
cee5f132 919#endif
f0989ec0 920#ifdef SUPPORT_SOCKS
8768d548 921 fprintf(fp, " SOCKS");
f2de3a33 922#endif
7952eef9 923#ifdef SUPPORT_SPF
8768d548 924 fprintf(fp, " SPF");
7952eef9 925#endif
1a2e76e1
JH
926#ifdef SUPPORT_DMARC
927 fprintf(fp, " DMARC");
928#endif
1a2dfad5 929#ifdef TCP_FASTOPEN
d85cdeb5 930 tcp_init();
8768d548 931 if (f.tcp_fastopen_ok) fprintf(fp, " TCP_Fast_Open");
1a2dfad5 932#endif
5bde3efa 933#ifdef EXPERIMENTAL_LMDB
8768d548 934 fprintf(fp, " Experimental_LMDB");
5bde3efa 935#endif
3369a853 936#ifdef EXPERIMENTAL_QUEUEFILE
8768d548 937 fprintf(fp, " Experimental_QUEUEFILE");
3369a853 938#endif
7ef88aa0 939#if defined(EXPERIMENTAL_SRS) || defined(EXPERIMENTAL_SRS_NATIVE)
8768d548 940 fprintf(fp, " Experimental_SRS");
8523533c 941#endif
617d3932 942#ifdef EXPERIMENTAL_ARC
8768d548 943 fprintf(fp, " Experimental_ARC");
617d3932 944#endif
8523533c 945#ifdef EXPERIMENTAL_BRIGHTMAIL
8768d548 946 fprintf(fp, " Experimental_Brightmail");
8523533c 947#endif
6a8f9482 948#ifdef EXPERIMENTAL_DCC
8768d548 949 fprintf(fp, " Experimental_DCC");
6a8f9482 950#endif
895fbaf2 951#ifdef EXPERIMENTAL_DSN_INFO
8768d548 952 fprintf(fp, " Experimental_DSN_info");
895fbaf2 953#endif
b10c87b3
JH
954#ifdef EXPERIMENTAL_TLS_RESUME
955 fprintf(fp, " Experimental_TLS_resume");
956#endif
8768d548 957fprintf(fp, "\n");
059ec3d9 958
8768d548 959fprintf(fp, "Lookups (built-in):");
e6d225ae 960#if defined(LOOKUP_LSEARCH) && LOOKUP_LSEARCH!=2
8768d548 961 fprintf(fp, " lsearch wildlsearch nwildlsearch iplsearch");
059ec3d9 962#endif
e6d225ae 963#if defined(LOOKUP_CDB) && LOOKUP_CDB!=2
8768d548 964 fprintf(fp, " cdb");
059ec3d9 965#endif
e6d225ae 966#if defined(LOOKUP_DBM) && LOOKUP_DBM!=2
8768d548 967 fprintf(fp, " dbm dbmjz dbmnz");
059ec3d9 968#endif
e6d225ae 969#if defined(LOOKUP_DNSDB) && LOOKUP_DNSDB!=2
8768d548 970 fprintf(fp, " dnsdb");
059ec3d9 971#endif
e6d225ae 972#if defined(LOOKUP_DSEARCH) && LOOKUP_DSEARCH!=2
8768d548 973 fprintf(fp, " dsearch");
059ec3d9 974#endif
e6d225ae 975#if defined(LOOKUP_IBASE) && LOOKUP_IBASE!=2
8768d548 976 fprintf(fp, " ibase");
059ec3d9 977#endif
ffc92d69
JH
978#if defined(LOOKUP_JSON) && LOOKUP_JSON!=2
979 fprintf(fp, " json");
980#endif
e6d225ae 981#if defined(LOOKUP_LDAP) && LOOKUP_LDAP!=2
8768d548 982 fprintf(fp, " ldap ldapdn ldapm");
059ec3d9 983#endif
5bde3efa 984#ifdef EXPERIMENTAL_LMDB
8768d548 985 fprintf(fp, " lmdb");
5bde3efa 986#endif
e6d225ae 987#if defined(LOOKUP_MYSQL) && LOOKUP_MYSQL!=2
8768d548 988 fprintf(fp, " mysql");
059ec3d9 989#endif
e6d225ae 990#if defined(LOOKUP_NIS) && LOOKUP_NIS!=2
8768d548 991 fprintf(fp, " nis nis0");
059ec3d9 992#endif
e6d225ae 993#if defined(LOOKUP_NISPLUS) && LOOKUP_NISPLUS!=2
8768d548 994 fprintf(fp, " nisplus");
059ec3d9 995#endif
e6d225ae 996#if defined(LOOKUP_ORACLE) && LOOKUP_ORACLE!=2
8768d548 997 fprintf(fp, " oracle");
059ec3d9 998#endif
e6d225ae 999#if defined(LOOKUP_PASSWD) && LOOKUP_PASSWD!=2
8768d548 1000 fprintf(fp, " passwd");
059ec3d9 1001#endif
e6d225ae 1002#if defined(LOOKUP_PGSQL) && LOOKUP_PGSQL!=2
8768d548 1003 fprintf(fp, " pgsql");
059ec3d9 1004#endif
de78e2d5 1005#if defined(LOOKUP_REDIS) && LOOKUP_REDIS!=2
8768d548 1006 fprintf(fp, " redis");
de78e2d5 1007#endif
e6d225ae 1008#if defined(LOOKUP_SQLITE) && LOOKUP_SQLITE!=2
8768d548 1009 fprintf(fp, " sqlite");
13b685f9 1010#endif
e6d225ae 1011#if defined(LOOKUP_TESTDB) && LOOKUP_TESTDB!=2
8768d548 1012 fprintf(fp, " testdb");
059ec3d9 1013#endif
e6d225ae 1014#if defined(LOOKUP_WHOSON) && LOOKUP_WHOSON!=2
8768d548 1015 fprintf(fp, " whoson");
059ec3d9 1016#endif
8768d548 1017fprintf(fp, "\n");
059ec3d9 1018
8768d548
JH
1019auth_show_supported(fp);
1020route_show_supported(fp);
1021transport_show_supported(fp);
059ec3d9 1022
c11d665d 1023#ifdef WITH_CONTENT_SCAN
8768d548 1024malware_show_supported(fp);
c11d665d
JH
1025#endif
1026
059ec3d9
PH
1027if (fixed_never_users[0] > 0)
1028 {
1029 int i;
8768d548 1030 fprintf(fp, "Fixed never_users: ");
059ec3d9 1031 for (i = 1; i <= (int)fixed_never_users[0] - 1; i++)
8768d548
JH
1032 fprintf(fp, "%d:", (unsigned int)fixed_never_users[i]);
1033 fprintf(fp, "%d\n", (unsigned int)fixed_never_users[i]);
059ec3d9 1034 }
21c28500 1035
8768d548 1036fprintf(fp, "Configure owner: %d:%d\n", config_uid, config_gid);
19bfe9e7 1037
8768d548 1038fprintf(fp, "Size of off_t: " SIZE_T_FMT "\n", sizeof(off_t));
36f12725 1039
6545de78
PP
1040/* Everything else is details which are only worth reporting when debugging.
1041Perhaps the tls_version_report should move into this too. */
1042DEBUG(D_any) do {
1043
b3c261f7
PP
1044/* clang defines __GNUC__ (at least, for me) so test for it first */
1045#if defined(__clang__)
8768d548 1046 fprintf(fp, "Compiler: CLang [%s]\n", __clang_version__);
b3c261f7 1047#elif defined(__GNUC__)
8768d548 1048 fprintf(fp, "Compiler: GCC [%s]\n",
b3c261f7
PP
1049# ifdef __VERSION__
1050 __VERSION__
1051# else
1052 "? unknown version ?"
1053# endif
1054 );
1055#else
8768d548 1056 fprintf(fp, "Compiler: <unknown>\n");
b3c261f7
PP
1057#endif
1058
98913c8e 1059#if defined(__GLIBC__) && !defined(__UCLIBC__)
8768d548 1060 fprintf(fp, "Library version: Glibc: Compile: %d.%d\n",
01f3091a
JH
1061 __GLIBC__, __GLIBC_MINOR__);
1062 if (__GLIBC_PREREQ(2, 1))
8768d548 1063 fprintf(fp, " Runtime: %s\n",
01f3091a
JH
1064 gnu_get_libc_version());
1065#endif
1066
8768d548 1067show_db_version(fp);
96508de1 1068
01603eec 1069#ifndef DISABLE_TLS
8768d548 1070 tls_version_report(fp);
754a0503 1071#endif
8c5d388a 1072#ifdef SUPPORT_I18N
8768d548 1073 utf8_version_report(fp);
b04be5e7 1074#endif
754a0503 1075
d7978c0f 1076 for (auth_info * authi = auths_available; *authi->driver_name != '\0'; ++authi)
fc362fc5 1077 if (authi->version_report)
8768d548 1078 (*authi->version_report)(fp);
6545de78 1079
decd95cb 1080 /* PCRE_PRERELEASE is either defined and empty or a bare sequence of
6475bd82
PP
1081 characters; unless it's an ancient version of PCRE in which case it
1082 is not defined. */
1083#ifndef PCRE_PRERELEASE
01f3091a 1084# define PCRE_PRERELEASE
6475bd82
PP
1085#endif
1086#define QUOTE(X) #X
1087#define EXPAND_AND_QUOTE(X) QUOTE(X)
8768d548 1088 fprintf(fp, "Library version: PCRE: Compile: %d.%d%s\n"
6545de78
PP
1089 " Runtime: %s\n",
1090 PCRE_MAJOR, PCRE_MINOR,
6475bd82 1091 EXPAND_AND_QUOTE(PCRE_PRERELEASE) "",
6545de78 1092 pcre_version());
6475bd82
PP
1093#undef QUOTE
1094#undef EXPAND_AND_QUOTE
6545de78
PP
1095
1096 init_lookup_list();
d7978c0f 1097 for (int i = 0; i < lookup_list_count; i++)
6545de78 1098 if (lookup_list[i]->version_report)
8768d548 1099 lookup_list[i]->version_report(fp);
6545de78 1100
b70d2586 1101#ifdef WHITELIST_D_MACROS
8768d548 1102 fprintf(fp, "WHITELIST_D_MACROS: \"%s\"\n", WHITELIST_D_MACROS);
b70d2586 1103#else
8768d548 1104 fprintf(fp, "WHITELIST_D_MACROS unset\n");
b70d2586
PP
1105#endif
1106#ifdef TRUSTED_CONFIG_LIST
8768d548 1107 fprintf(fp, "TRUSTED_CONFIG_LIST: \"%s\"\n", TRUSTED_CONFIG_LIST);
b70d2586 1108#else
8768d548 1109 fprintf(fp, "TRUSTED_CONFIG_LIST unset\n");
b70d2586
PP
1110#endif
1111
6545de78 1112} while (0);
059ec3d9
PH
1113}
1114
1115
98a90c36
PP
1116/*************************************************
1117* Show auxiliary information about Exim *
1118*************************************************/
1119
1120static void
1121show_exim_information(enum commandline_info request, FILE *stream)
1122{
98a90c36
PP
1123switch(request)
1124 {
1125 case CMDINFO_NONE:
1126 fprintf(stream, "Oops, something went wrong.\n");
1127 return;
1128 case CMDINFO_HELP:
1129 fprintf(stream,
1130"The -bI: flag takes a string indicating which information to provide.\n"
1131"If the string is not recognised, you'll get this help (on stderr).\n"
1132"\n"
1133" exim -bI:help this information\n"
030caf2a
JS
1134" exim -bI:dscp list of known dscp value keywords\n"
1135" exim -bI:sieve list of supported sieve extensions\n"
98a90c36
PP
1136);
1137 return;
1138 case CMDINFO_SIEVE:
d7978c0f 1139 for (const uschar ** pp = exim_sieve_extension_list; *pp; ++pp)
98a90c36
PP
1140 fprintf(stream, "%s\n", *pp);
1141 return;
36a3ae5f
PP
1142 case CMDINFO_DSCP:
1143 dscp_list_to_stream(stream);
1144 return;
98a90c36
PP
1145 }
1146}
059ec3d9
PH
1147
1148
1149/*************************************************
1150* Quote a local part *
1151*************************************************/
1152
1153/* This function is used when a sender address or a From: or Sender: header
1154line is being created from the caller's login, or from an authenticated_id. It
1155applies appropriate quoting rules for a local part.
1156
1157Argument: the local part
1158Returns: the local part, quoted if necessary
1159*/
1160
1161uschar *
1162local_part_quote(uschar *lpart)
1163{
1164BOOL needs_quote = FALSE;
acec9514 1165gstring * g;
059ec3d9 1166
d7978c0f 1167for (uschar * t = lpart; !needs_quote && *t != 0; t++)
059ec3d9
PH
1168 {
1169 needs_quote = !isalnum(*t) && strchr("!#$%&'*+-/=?^_`{|}~", *t) == NULL &&
1170 (*t != '.' || t == lpart || t[1] == 0);
1171 }
1172
1173if (!needs_quote) return lpart;
1174
acec9514 1175g = string_catn(NULL, US"\"", 1);
059ec3d9
PH
1176
1177for (;;)
1178 {
1179 uschar *nq = US Ustrpbrk(lpart, "\\\"");
1180 if (nq == NULL)
1181 {
acec9514 1182 g = string_cat(g, lpart);
059ec3d9
PH
1183 break;
1184 }
acec9514
JH
1185 g = string_catn(g, lpart, nq - lpart);
1186 g = string_catn(g, US"\\", 1);
1187 g = string_catn(g, nq, 1);
059ec3d9
PH
1188 lpart = nq + 1;
1189 }
1190
acec9514
JH
1191g = string_catn(g, US"\"", 1);
1192return string_from_gstring(g);
059ec3d9
PH
1193}
1194
1195
1196
1197#ifdef USE_READLINE
1198/*************************************************
1199* Load readline() functions *
1200*************************************************/
1201
1202/* This function is called from testing executions that read data from stdin,
1203but only when running as the calling user. Currently, only -be does this. The
1204function loads the readline() function library and passes back the functions.
1205On some systems, it needs the curses library, so load that too, but try without
1206it if loading fails. All this functionality has to be requested at build time.
1207
1208Arguments:
1209 fn_readline_ptr pointer to where to put the readline pointer
1210 fn_addhist_ptr pointer to where to put the addhistory function
1211
1212Returns: the dlopen handle or NULL on failure
1213*/
1214
1215static void *
1ba28e2b
PP
1216set_readline(char * (**fn_readline_ptr)(const char *),
1217 void (**fn_addhist_ptr)(const char *))
059ec3d9
PH
1218{
1219void *dlhandle;
e12f8c32 1220void *dlhandle_curses = dlopen("libcurses." DYNLIB_FN_EXT, RTLD_GLOBAL|RTLD_LAZY);
059ec3d9 1221
e12f8c32 1222dlhandle = dlopen("libreadline." DYNLIB_FN_EXT, RTLD_GLOBAL|RTLD_NOW);
059ec3d9
PH
1223if (dlhandle_curses != NULL) dlclose(dlhandle_curses);
1224
1225if (dlhandle != NULL)
1226 {
1ba28e2b
PP
1227 /* Checked manual pages; at least in GNU Readline 6.1, the prototypes are:
1228 * char * readline (const char *prompt);
1229 * void add_history (const char *string);
1230 */
1231 *fn_readline_ptr = (char *(*)(const char*))dlsym(dlhandle, "readline");
1232 *fn_addhist_ptr = (void(*)(const char*))dlsym(dlhandle, "add_history");
059ec3d9
PH
1233 }
1234else
1235 {
1236 DEBUG(D_any) debug_printf("failed to load readline: %s\n", dlerror());
1237 }
1238
1239return dlhandle;
1240}
1241#endif
1242
1243
1244
1245/*************************************************
1246* Get a line from stdin for testing things *
1247*************************************************/
1248
1249/* This function is called when running tests that can take a number of lines
1250of input (for example, -be and -bt). It handles continuations and trailing
1251spaces. And prompting and a blank line output on eof. If readline() is in use,
1252the arguments are non-NULL and provide the relevant functions.
1253
1254Arguments:
1255 fn_readline readline function or NULL
1256 fn_addhist addhist function or NULL
1257
1258Returns: pointer to dynamic memory, or NULL at end of file
1259*/
1260
1261static uschar *
1ba28e2b 1262get_stdinput(char *(*fn_readline)(const char *), void(*fn_addhist)(const char *))
059ec3d9 1263{
acec9514 1264gstring * g = NULL;
059ec3d9 1265
acec9514 1266if (!fn_readline) { printf("> "); fflush(stdout); }
059ec3d9 1267
d7978c0f 1268for (int i = 0;; i++)
059ec3d9
PH
1269 {
1270 uschar buffer[1024];
1271 uschar *p, *ss;
1272
1273 #ifdef USE_READLINE
1274 char *readline_line = NULL;
f3ebb786 1275 if (fn_readline)
059ec3d9 1276 {
f3ebb786
JH
1277 if (!(readline_line = fn_readline((i > 0)? "":"> "))) break;
1278 if (*readline_line != 0 && fn_addhist) fn_addhist(readline_line);
059ec3d9
PH
1279 p = US readline_line;
1280 }
1281 else
1282 #endif
1283
1284 /* readline() not in use */
1285
1286 {
1287 if (Ufgets(buffer, sizeof(buffer), stdin) == NULL) break;
1288 p = buffer;
1289 }
1290
1291 /* Handle the line */
1292
1293 ss = p + (int)Ustrlen(p);
1294 while (ss > p && isspace(ss[-1])) ss--;
1295
1296 if (i > 0)
059ec3d9 1297 while (p < ss && isspace(*p)) p++; /* leading space after cont */
059ec3d9 1298
acec9514 1299 g = string_catn(g, p, ss - p);
059ec3d9
PH
1300
1301 #ifdef USE_READLINE
acec9514 1302 if (fn_readline) free(readline_line);
059ec3d9
PH
1303 #endif
1304
acec9514
JH
1305 /* g can only be NULL if ss==p */
1306 if (ss == p || g->s[g->ptr-1] != '\\')
059ec3d9 1307 break;
acec9514
JH
1308
1309 --g->ptr;
1310 (void) string_from_gstring(g);
059ec3d9
PH
1311 }
1312
acec9514
JH
1313if (!g) printf("\n");
1314return string_from_gstring(g);
059ec3d9
PH
1315}
1316
1317
1318
1319/*************************************************
81ea09ca
NM
1320* Output usage information for the program *
1321*************************************************/
1322
1323/* This function is called when there are no recipients
1324 or a specific --help argument was added.
1325
1326Arguments:
1327 progname information on what name we were called by
1328
1329Returns: DOES NOT RETURN
1330*/
1331
1332static void
1333exim_usage(uschar *progname)
1334{
1335
4c04137d 1336/* Handle specific program invocation variants */
81ea09ca 1337if (Ustrcmp(progname, US"-mailq") == 0)
9af3c549 1338 exim_fail(
e765a0f1 1339 "mailq - list the contents of the mail queue\n\n"
81ea09ca 1340 "For a list of options, see the Exim documentation.\n");
81ea09ca
NM
1341
1342/* Generic usage - we output this whatever happens */
9af3c549 1343exim_fail(
81ea09ca
NM
1344 "Exim is a Mail Transfer Agent. It is normally called by Mail User Agents,\n"
1345 "not directly from a shell command line. Options and/or arguments control\n"
1346 "what it does when called. For a list of options, see the Exim documentation.\n");
81ea09ca
NM
1347}
1348
1349
1350
1351/*************************************************
a7cbbf50
PP
1352* Validate that the macros given are okay *
1353*************************************************/
1354
1355/* Typically, Exim will drop privileges if macros are supplied. In some
1356cases, we want to not do so.
1357
a4034eb8 1358Arguments: opt_D_used - true if the commandline had a "-D" option
a7cbbf50
PP
1359Returns: true if trusted, false otherwise
1360*/
1361
1362static BOOL
a4034eb8 1363macros_trusted(BOOL opt_D_used)
a7cbbf50
PP
1364{
1365#ifdef WHITELIST_D_MACROS
d7978c0f 1366uschar *whitelisted, *end, *p, **whites;
a7cbbf50
PP
1367int white_count, i, n;
1368size_t len;
1369BOOL prev_char_item, found;
1370#endif
1371
a4034eb8 1372if (!opt_D_used)
a7cbbf50
PP
1373 return TRUE;
1374#ifndef WHITELIST_D_MACROS
1375return FALSE;
1376#else
1377
66581d1e
PP
1378/* We only trust -D overrides for some invoking users:
1379root, the exim run-time user, the optional config owner user.
1380I don't know why config-owner would be needed, but since they can own the
1381config files anyway, there's no security risk to letting them override -D. */
1382if ( ! ((real_uid == root_uid)
1383 || (real_uid == exim_uid)
1384#ifdef CONFIGURE_OWNER
1385 || (real_uid == config_uid)
1386#endif
1387 ))
1388 {
1389 debug_printf("macros_trusted rejecting macros for uid %d\n", (int) real_uid);
1390 return FALSE;
1391 }
1392
a7cbbf50 1393/* Get a list of macros which are whitelisted */
f3ebb786 1394whitelisted = string_copy_perm(US WHITELIST_D_MACROS, FALSE);
a7cbbf50
PP
1395prev_char_item = FALSE;
1396white_count = 0;
1397for (p = whitelisted; *p != '\0'; ++p)
1398 {
1399 if (*p == ':' || isspace(*p))
1400 {
1401 *p = '\0';
1402 if (prev_char_item)
1403 ++white_count;
1404 prev_char_item = FALSE;
1405 continue;
1406 }
1407 if (!prev_char_item)
1408 prev_char_item = TRUE;
1409 }
1410end = p;
1411if (prev_char_item)
1412 ++white_count;
1413if (!white_count)
1414 return FALSE;
1415whites = store_malloc(sizeof(uschar *) * (white_count+1));
1416for (p = whitelisted, i = 0; (p != end) && (i < white_count); ++p)
1417 {
1418 if (*p != '\0')
1419 {
1420 whites[i++] = p;
1421 if (i == white_count)
1422 break;
1423 while (*p != '\0' && p < end)
1424 ++p;
1425 }
1426 }
1427whites[i] = NULL;
1428
1a7c9a48
JH
1429/* The list of commandline macros should be very short.
1430Accept the N*M complexity. */
d7978c0f 1431for (macro_item * m = macros_user; m; m = m->next) if (m->command_line)
1a7c9a48
JH
1432 {
1433 found = FALSE;
d7978c0f 1434 for (uschar ** w = whites; *w; ++w)
1a7c9a48
JH
1435 if (Ustrcmp(*w, m->name) == 0)
1436 {
1437 found = TRUE;
1438 break;
1439 }
1440 if (!found)
1441 return FALSE;
1442 if (!m->replacement)
1443 continue;
1444 if ((len = m->replen) == 0)
1445 continue;
1446 n = pcre_exec(regex_whitelisted_macro, NULL, CS m->replacement, len,
1447 0, PCRE_EOPT, NULL, 0);
1448 if (n < 0)
1449 {
1450 if (n != PCRE_ERROR_NOMATCH)
1451 debug_printf("macros_trusted checking %s returned %d\n", m->name, n);
1452 return FALSE;
1453 }
1454 }
43236f35 1455DEBUG(D_any) debug_printf("macros_trusted overridden to true by whitelisting\n");
a7cbbf50
PP
1456return TRUE;
1457#endif
1458}
1459
1460
1461/*************************************************
9650d98a
JH
1462* Expansion testing *
1463*************************************************/
1464
1465/* Expand and print one item, doing macro-processing.
1466
1467Arguments:
1468 item line for expansion
1469*/
1470
1471static void
1472expansion_test_line(uschar * line)
1473{
1474int len;
1475BOOL dummy_macexp;
1476
1477Ustrncpy(big_buffer, line, big_buffer_size);
1478big_buffer[big_buffer_size-1] = '\0';
1479len = Ustrlen(big_buffer);
1480
1481(void) macros_expand(0, &len, &dummy_macexp);
1482
1483if (isupper(big_buffer[0]))
1484 {
1485 if (macro_read_assignment(big_buffer))
1a7c9a48 1486 printf("Defined macro '%s'\n", mlast->name);
9650d98a
JH
1487 }
1488else
1489 if ((line = expand_string(big_buffer))) printf("%s\n", CS line);
1490 else printf("Failed: %s\n", expand_string_message);
1491}
1492
1493
9af3c549 1494
9650d98a 1495/*************************************************
059ec3d9
PH
1496* Entry point and high-level code *
1497*************************************************/
1498
1499/* Entry point for the Exim mailer. Analyse the arguments and arrange to take
1500the appropriate action. All the necessary functions are present in the one
1501binary. I originally thought one should split it up, but it turns out that so
1502much of the apparatus is needed in each chunk that one might as well just have
1503it all available all the time, which then makes the coding easier as well.
1504
1505Arguments:
1506 argc count of entries in argv
1507 argv argument strings, with argv[0] being the program name
1508
1509Returns: EXIT_SUCCESS if terminated successfully
1510 EXIT_FAILURE otherwise, except when a message has been sent
1511 to the sender, and -oee was given
1512*/
1513
1514int
1515main(int argc, char **cargv)
1516{
1517uschar **argv = USS cargv;
1518int arg_receive_timeout = -1;
1519int arg_smtp_receive_timeout = -1;
1520int arg_error_handling = error_handling;
f05da2e8
PH
1521int filter_sfd = -1;
1522int filter_ufd = -1;
059ec3d9 1523int group_count;
1670ef10 1524int i, rv;
059ec3d9
PH
1525int list_queue_option = 0;
1526int msg_action = 0;
1527int msg_action_arg = -1;
1528int namelen = (argv[0] == NULL)? 0 : Ustrlen(argv[0]);
1529int queue_only_reason = 0;
1530#ifdef EXIM_PERL
1531int perl_start_option = 0;
1532#endif
1533int recipients_arg = argc;
1534int sender_address_domain = 0;
1535int test_retry_arg = -1;
1536int test_rewrite_arg = -1;
3b7ac02c 1537gid_t original_egid;
059ec3d9
PH
1538BOOL arg_queue_only = FALSE;
1539BOOL bi_option = FALSE;
1540BOOL checking = FALSE;
1541BOOL count_queue = FALSE;
1542BOOL expansion_test = FALSE;
1543BOOL extract_recipients = FALSE;
f4ee74ac 1544BOOL flag_G = FALSE;
12f69989 1545BOOL flag_n = FALSE;
059ec3d9
PH
1546BOOL forced_delivery = FALSE;
1547BOOL f_end_dot = FALSE;
1548BOOL deliver_give_up = FALSE;
1549BOOL list_queue = FALSE;
1550BOOL list_options = FALSE;
bf3c2c6b 1551BOOL list_config = FALSE;
059ec3d9
PH
1552BOOL local_queue_only;
1553BOOL more = TRUE;
1554BOOL one_msg_action = FALSE;
4ab69ec7 1555BOOL opt_D_used = FALSE;
059ec3d9
PH
1556BOOL queue_only_set = FALSE;
1557BOOL receiving_message = TRUE;
33d73e3b 1558BOOL sender_ident_set = FALSE;
8669f003 1559BOOL session_local_queue_only;
059ec3d9
PH
1560BOOL unprivileged;
1561BOOL removed_privilege = FALSE;
81ea09ca 1562BOOL usage_wanted = FALSE;
059ec3d9
PH
1563BOOL verify_address_mode = FALSE;
1564BOOL verify_as_sender = FALSE;
1565BOOL version_printed = FALSE;
1566uschar *alias_arg = NULL;
1567uschar *called_as = US"";
a3fb9793 1568uschar *cmdline_syslog_name = NULL;
059ec3d9
PH
1569uschar *start_queue_run_id = NULL;
1570uschar *stop_queue_run_id = NULL;
328895cc 1571uschar *expansion_test_message = NULL;
059ec3d9
PH
1572uschar *ftest_domain = NULL;
1573uschar *ftest_localpart = NULL;
1574uschar *ftest_prefix = NULL;
1575uschar *ftest_suffix = NULL;
0ad2e0fc 1576uschar *log_oneline = NULL;
8544e77a 1577uschar *malware_test_file = NULL;
059ec3d9
PH
1578uschar *real_sender_address;
1579uschar *originator_home = US"/";
a3fb9793 1580size_t sz;
f3ebb786 1581rmark reset_point;
059ec3d9
PH
1582
1583struct passwd *pw;
1584struct stat statbuf;
1585pid_t passed_qr_pid = (pid_t)0;
1586int passed_qr_pipe = -1;
157d73b5 1587gid_t group_list[EXIM_GROUPLIST_SIZE];
059ec3d9 1588
98a90c36
PP
1589/* For the -bI: flag */
1590enum commandline_info info_flag = CMDINFO_NONE;
1591BOOL info_stdout = FALSE;
1592
059ec3d9
PH
1593/* Possible options for -R and -S */
1594
1595static uschar *rsopts[] = { US"f", US"ff", US"r", US"rf", US"rff" };
1596
1597/* Need to define this in case we need to change the environment in order
1598to get rid of a bogus time zone. We have to make it char rather than uschar
1599because some OS define it in /usr/include/unistd.h. */
1600
1601extern char **environ;
1602
9f01e50d
JH
1603#ifdef MEASURE_TIMING
1604(void)gettimeofday(&timestamp_startup, NULL);
1605#endif
1606
35edf2ff 1607/* If the Exim user and/or group and/or the configuration file owner/group were
059ec3d9
PH
1608defined by ref:name at build time, we must now find the actual uid/gid values.
1609This is a feature to make the lives of binary distributors easier. */
1610
1611#ifdef EXIM_USERNAME
1612if (route_finduser(US EXIM_USERNAME, &pw, &exim_uid))
1613 {
10385c15 1614 if (exim_uid == 0)
9af3c549
JH
1615 exim_fail("exim: refusing to run with uid 0 for \"%s\"\n", EXIM_USERNAME);
1616
084c1d8c
PP
1617 /* If ref:name uses a number as the name, route_finduser() returns
1618 TRUE with exim_uid set and pw coerced to NULL. */
1619 if (pw)
1620 exim_gid = pw->pw_gid;
1621#ifndef EXIM_GROUPNAME
1622 else
9af3c549 1623 exim_fail(
084c1d8c
PP
1624 "exim: ref:name should specify a usercode, not a group.\n"
1625 "exim: can't let you get away with it unless you also specify a group.\n");
084c1d8c 1626#endif
059ec3d9
PH
1627 }
1628else
9af3c549 1629 exim_fail("exim: failed to find uid for user name \"%s\"\n", EXIM_USERNAME);
059ec3d9
PH
1630#endif
1631
1632#ifdef EXIM_GROUPNAME
1633if (!route_findgroup(US EXIM_GROUPNAME, &exim_gid))
9af3c549 1634 exim_fail("exim: failed to find gid for group name \"%s\"\n", EXIM_GROUPNAME);
059ec3d9
PH
1635#endif
1636
1637#ifdef CONFIGURE_OWNERNAME
1638if (!route_finduser(US CONFIGURE_OWNERNAME, NULL, &config_uid))
9af3c549 1639 exim_fail("exim: failed to find uid for user name \"%s\"\n",
059ec3d9 1640 CONFIGURE_OWNERNAME);
059ec3d9
PH
1641#endif
1642
79d4bc3d
PP
1643/* We default the system_filter_user to be the Exim run-time user, as a
1644sane non-root value. */
1645system_filter_uid = exim_uid;
1646
35edf2ff
PH
1647#ifdef CONFIGURE_GROUPNAME
1648if (!route_findgroup(US CONFIGURE_GROUPNAME, &config_gid))
9af3c549 1649 exim_fail("exim: failed to find gid for group name \"%s\"\n",
35edf2ff 1650 CONFIGURE_GROUPNAME);
35edf2ff
PH
1651#endif
1652
92e6a3d9
JH
1653/* In the Cygwin environment, some initialization used to need doing.
1654It was fudged in by means of this macro; now no longer but we'll leave
1655it in case of others. */
059ec3d9
PH
1656
1657#ifdef OS_INIT
1658OS_INIT
1659#endif
1660
1661/* Check a field which is patched when we are running Exim within its
1662testing harness; do a fast initial check, and then the whole thing. */
1663
8768d548 1664f.running_in_test_harness =
059ec3d9 1665 *running_status == '<' && Ustrcmp(running_status, "<<<testing>>>") == 0;
8768d548 1666if (f.running_in_test_harness)
65a32f85 1667 debug_store = TRUE;
059ec3d9
PH
1668
1669/* The C standard says that the equivalent of setlocale(LC_ALL, "C") is obeyed
1670at the start of a program; however, it seems that some environments do not
1671follow this. A "strange" locale can affect the formatting of timestamps, so we
1672make quite sure. */
1673
1674setlocale(LC_ALL, "C");
1675
1676/* Set up the default handler for timing using alarm(). */
1677
1678os_non_restarting_signal(SIGALRM, sigalrm_handler);
1679
1680/* Ensure we have a buffer for constructing log entries. Use malloc directly,
1681because store_malloc writes a log entry on failure. */
1682
40c90bca 1683if (!(log_buffer = US malloc(LOG_BUFFER_SIZE)))
9af3c549 1684 exim_fail("exim: failed to get store for log buffer\n");
059ec3d9 1685
6c6d6e48
TF
1686/* Initialize the default log options. */
1687
1688bits_set(log_selector, log_selector_size, log_default);
1689
059ec3d9
PH
1690/* Set log_stderr to stderr, provided that stderr exists. This gets reset to
1691NULL when the daemon is run and the file is closed. We have to use this
1692indirection, because some systems don't allow writing to the variable "stderr".
1693*/
1694
1695if (fstat(fileno(stderr), &statbuf) >= 0) log_stderr = stderr;
1696
1697/* Arrange for the PCRE regex library to use our store functions. Note that
1698the normal calls are actually macros that add additional arguments for
1699debugging purposes so we have to assign specially constructed functions here.
1700The default is to use store in the stacking pool, but this is overridden in the
1701regex_must_compile() function. */
1702
1703pcre_malloc = function_store_get;
1704pcre_free = function_dummy_free;
1705
1706/* Ensure there is a big buffer for temporary use in several places. It is put
1707in malloc store so that it can be freed for enlargement if necessary. */
1708
1709big_buffer = store_malloc(big_buffer_size);
1710
1711/* Set up the handler for the data request signal, and set the initial
1712descriptive text. */
1713
f3ebb786 1714process_info = store_get(PROCESS_INFO_SIZE, TRUE); /* tainted */
059ec3d9
PH
1715set_process_info("initializing");
1716os_restarting_signal(SIGUSR1, usr1_handler);
1717
830832c9
HSHR
1718/* If running in a dockerized environment, the TERM signal is only
1719delegated to the PID 1 if we request it by setting an signal handler */
1720if (getpid() == 1) signal(SIGTERM, term_handler);
1721
059ec3d9
PH
1722/* SIGHUP is used to get the daemon to reconfigure. It gets set as appropriate
1723in the daemon code. For the rest of Exim's uses, we ignore it. */
1724
1725signal(SIGHUP, SIG_IGN);
1726
1727/* We don't want to die on pipe errors as the code is written to handle
1728the write error instead. */
1729
1730signal(SIGPIPE, SIG_IGN);
1731
1732/* Under some circumstance on some OS, Exim can get called with SIGCHLD
1733set to SIG_IGN. This causes subprocesses that complete before the parent
1734process waits for them not to hang around, so when Exim calls wait(), nothing
1735is there. The wait() code has been made robust against this, but let's ensure
1736that SIGCHLD is set to SIG_DFL, because it's tidier to wait and get a process
1737ending status. We use sigaction rather than plain signal() on those OS where
1738SA_NOCLDWAIT exists, because we want to be sure it is turned off. (There was a
1739problem on AIX with this.) */
1740
1741#ifdef SA_NOCLDWAIT
1742 {
1743 struct sigaction act;
1744 act.sa_handler = SIG_DFL;
1745 sigemptyset(&(act.sa_mask));
1746 act.sa_flags = 0;
1747 sigaction(SIGCHLD, &act, NULL);
1748 }
1749#else
1750signal(SIGCHLD, SIG_DFL);
1751#endif
1752
1753/* Save the arguments for use if we re-exec exim as a daemon after receiving
1754SIGHUP. */
1755
1756sighup_argv = argv;
1757
1758/* Set up the version number. Set up the leading 'E' for the external form of
1759message ids, set the pointer to the internal form, and initialize it to
1760indicate no message being processed. */
1761
1762version_init();
1763message_id_option[0] = '-';
1764message_id_external = message_id_option + 1;
1765message_id_external[0] = 'E';
1766message_id = message_id_external + 1;
1767message_id[0] = 0;
1768
67d175de 1769/* Set the umask to zero so that any files Exim creates using open() are
2632889e
PH
1770created with the modes that it specifies. NOTE: Files created with fopen() have
1771a problem, which was not recognized till rather late (February 2006). With this
1772umask, such files will be world writeable. (They are all content scanning files
1773in the spool directory, which isn't world-accessible, so this is not a
1774disaster, but it's untidy.) I don't want to change this overall setting,
1775however, because it will interact badly with the open() calls. Instead, there's
1776now a function called modefopen() that fiddles with the umask while calling
1777fopen(). */
059ec3d9 1778
67d175de 1779(void)umask(0);
059ec3d9
PH
1780
1781/* Precompile the regular expression for matching a message id. Keep this in
1782step with the code that generates ids in the accept.c module. We need to do
1783this here, because the -M options check their arguments for syntactic validity
1784using mac_ismsgid, which uses this. */
1785
1786regex_ismsgid =
1787 regex_must_compile(US"^(?:[^\\W_]{6}-){2}[^\\W_]{2}$", FALSE, TRUE);
1788
a5bd321b 1789/* Precompile the regular expression that is used for matching an SMTP error
d6a96edc
PH
1790code, possibly extended, at the start of an error message. Note that the
1791terminating whitespace character is included. */
a5bd321b
PH
1792
1793regex_smtp_code =
1794 regex_must_compile(US"^\\d\\d\\d\\s(?:\\d\\.\\d\\d?\\d?\\.\\d\\d?\\d?\\s)?",
1795 FALSE, TRUE);
1796
a7cbbf50
PP
1797#ifdef WHITELIST_D_MACROS
1798/* Precompile the regular expression used to filter the content of macros
1799given to -D for permissibility. */
1800
1801regex_whitelisted_macro =
1802 regex_must_compile(US"^[A-Za-z0-9_/.-]*$", FALSE, TRUE);
1803#endif
1804
f38917cc
JH
1805for (i = 0; i < REGEX_VARS; i++) regex_vars[i] = NULL;
1806
059ec3d9
PH
1807/* If the program is called as "mailq" treat it as equivalent to "exim -bp";
1808this seems to be a generally accepted convention, since one finds symbolic
1809links called "mailq" in standard OS configurations. */
1810
1811if ((namelen == 5 && Ustrcmp(argv[0], "mailq") == 0) ||
1812 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/mailq", 6) == 0))
1813 {
1814 list_queue = TRUE;
1815 receiving_message = FALSE;
1816 called_as = US"-mailq";
1817 }
1818
1819/* If the program is called as "rmail" treat it as equivalent to
1820"exim -i -oee", thus allowing UUCP messages to be input using non-SMTP mode,
1821i.e. preventing a single dot on a line from terminating the message, and
1822returning with zero return code, even in cases of error (provided an error
1823message has been sent). */
1824
1825if ((namelen == 5 && Ustrcmp(argv[0], "rmail") == 0) ||
1826 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rmail", 6) == 0))
1827 {
8768d548 1828 f.dot_ends = FALSE;
059ec3d9
PH
1829 called_as = US"-rmail";
1830 errors_sender_rc = EXIT_SUCCESS;
1831 }
1832
1833/* If the program is called as "rsmtp" treat it as equivalent to "exim -bS";
1834this is a smail convention. */
1835
1836if ((namelen == 5 && Ustrcmp(argv[0], "rsmtp") == 0) ||
1837 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rsmtp", 6) == 0))
1838 {
1839 smtp_input = smtp_batched_input = TRUE;
1840 called_as = US"-rsmtp";
1841 }
1842
1843/* If the program is called as "runq" treat it as equivalent to "exim -q";
1844this is a smail convention. */
1845
1846if ((namelen == 4 && Ustrcmp(argv[0], "runq") == 0) ||
1847 (namelen > 4 && Ustrncmp(argv[0] + namelen - 5, "/runq", 5) == 0))
1848 {
1849 queue_interval = 0;
1850 receiving_message = FALSE;
1851 called_as = US"-runq";
1852 }
1853
1854/* If the program is called as "newaliases" treat it as equivalent to
1855"exim -bi"; this is a sendmail convention. */
1856
1857if ((namelen == 10 && Ustrcmp(argv[0], "newaliases") == 0) ||
1858 (namelen > 10 && Ustrncmp(argv[0] + namelen - 11, "/newaliases", 11) == 0))
1859 {
1860 bi_option = TRUE;
1861 receiving_message = FALSE;
1862 called_as = US"-newaliases";
1863 }
1864
1865/* Save the original effective uid for a couple of uses later. It should
1866normally be root, but in some esoteric environments it may not be. */
1867
1868original_euid = geteuid();
3b7ac02c 1869original_egid = getegid();
059ec3d9
PH
1870
1871/* Get the real uid and gid. If the caller is root, force the effective uid/gid
1872to be the same as the real ones. This makes a difference only if Exim is setuid
1873(or setgid) to something other than root, which could be the case in some
1874special configurations. */
1875
1876real_uid = getuid();
1877real_gid = getgid();
1878
1879if (real_uid == root_uid)
1880 {
9af3c549
JH
1881 if ((rv = setgid(real_gid)))
1882 exim_fail("exim: setgid(%ld) failed: %s\n",
1670ef10 1883 (long int)real_gid, strerror(errno));
9af3c549
JH
1884 if ((rv = setuid(real_uid)))
1885 exim_fail("exim: setuid(%ld) failed: %s\n",
1670ef10 1886 (long int)real_uid, strerror(errno));
059ec3d9
PH
1887 }
1888
1889/* If neither the original real uid nor the original euid was root, Exim is
1890running in an unprivileged state. */
1891
1892unprivileged = (real_uid != root_uid && original_euid != root_uid);
1893
059ec3d9
PH
1894/* Scan the program's arguments. Some can be dealt with right away; others are
1895simply recorded for checking and handling afterwards. Do a high-level switch
1896on the second character (the one after '-'), to save some effort. */
1897
1898for (i = 1; i < argc; i++)
1899 {
1900 BOOL badarg = FALSE;
1901 uschar *arg = argv[i];
1902 uschar *argrest;
1903 int switchchar;
1904
1905 /* An argument not starting with '-' is the start of a recipients list;
1906 break out of the options-scanning loop. */
1907
1908 if (arg[0] != '-')
1909 {
1910 recipients_arg = i;
1911 break;
1912 }
1913
4c04137d 1914 /* An option consisting of -- terminates the options */
059ec3d9
PH
1915
1916 if (Ustrcmp(arg, "--") == 0)
1917 {
1918 recipients_arg = i + 1;
1919 break;
1920 }
1921
1922 /* Handle flagged options */
1923
1924 switchchar = arg[1];
1925 argrest = arg+2;
1926
1927 /* Make all -ex options synonymous with -oex arguments, since that
1928 is assumed by various callers. Also make -qR options synonymous with -R
1929 options, as that seems to be required as well. Allow for -qqR too, and
1930 the same for -S options. */
1931
1932 if (Ustrncmp(arg+1, "oe", 2) == 0 ||
1933 Ustrncmp(arg+1, "qR", 2) == 0 ||
1934 Ustrncmp(arg+1, "qS", 2) == 0)
1935 {
1936 switchchar = arg[2];
1937 argrest++;
1938 }
1939 else if (Ustrncmp(arg+1, "qqR", 3) == 0 || Ustrncmp(arg+1, "qqS", 3) == 0)
1940 {
1941 switchchar = arg[3];
1942 argrest += 2;
8768d548 1943 f.queue_2stage = TRUE;
059ec3d9
PH
1944 }
1945
1946 /* Make -r synonymous with -f, since it is a documented alias */
1947
1948 else if (arg[1] == 'r') switchchar = 'f';
1949
1950 /* Make -ov synonymous with -v */
1951
1952 else if (Ustrcmp(arg, "-ov") == 0)
1953 {
1954 switchchar = 'v';
1955 argrest++;
1956 }
1957
4b2241d2
PP
1958 /* deal with --option_aliases */
1959 else if (switchchar == '-')
1960 {
1961 if (Ustrcmp(argrest, "help") == 0)
1962 {
1963 usage_wanted = TRUE;
1964 break;
1965 }
1966 else if (Ustrcmp(argrest, "version") == 0)
1967 {
1968 switchchar = 'b';
73a46702 1969 argrest = US"V";
4b2241d2
PP
1970 }
1971 }
1972
059ec3d9
PH
1973 /* High-level switch on active initial letter */
1974
1975 switch(switchchar)
1976 {
a3fb9793
PP
1977
1978 /* sendmail uses -Ac and -Am to control which .cf file is used;
1979 we ignore them. */
1980 case 'A':
1981 if (*argrest == '\0') { badarg = TRUE; break; }
1982 else
1983 {
1984 BOOL ignore = FALSE;
1985 switch (*argrest)
1986 {
1987 case 'c':
1988 case 'm':
1989 if (*(argrest + 1) == '\0')
1990 ignore = TRUE;
1991 break;
1992 }
1993 if (!ignore) { badarg = TRUE; break; }
1994 }
1995 break;
1996
059ec3d9
PH
1997 /* -Btype is a sendmail option for 7bit/8bit setting. Exim is 8-bit clean
1998 so has no need of it. */
1999
2000 case 'B':
2001 if (*argrest == 0) i++; /* Skip over the type */
2002 break;
2003
2004
2005 case 'b':
2006 receiving_message = FALSE; /* Reset TRUE for -bm, -bS, -bs below */
2007
2008 /* -bd: Run in daemon mode, awaiting SMTP connections.
2009 -bdf: Ditto, but in the foreground.
2010 */
2011
2012 if (*argrest == 'd')
2013 {
8768d548
JH
2014 f.daemon_listen = TRUE;
2015 if (*(++argrest) == 'f') f.background_daemon = FALSE;
059ec3d9
PH
2016 else if (*argrest != 0) { badarg = TRUE; break; }
2017 }
2018
328895cc
PH
2019 /* -be: Run in expansion test mode
2020 -bem: Ditto, but read a message from a file first
2021 */
059ec3d9
PH
2022
2023 else if (*argrest == 'e')
328895cc 2024 {
059ec3d9 2025 expansion_test = checking = TRUE;
328895cc
PH
2026 if (argrest[1] == 'm')
2027 {
2028 if (++i >= argc) { badarg = TRUE; break; }
2029 expansion_test_message = argv[i];
2030 argrest++;
2031 }
2032 if (argrest[1] != 0) { badarg = TRUE; break; }
2033 }
059ec3d9 2034
f05da2e8
PH
2035 /* -bF: Run system filter test */
2036
2037 else if (*argrest == 'F')
2038 {
34e86e20 2039 filter_test |= checking = FTEST_SYSTEM;
f05da2e8
PH
2040 if (*(++argrest) != 0) { badarg = TRUE; break; }
2041 if (++i < argc) filter_test_sfile = argv[i]; else
9af3c549 2042 exim_fail("exim: file name expected after %s\n", argv[i-1]);
f05da2e8
PH
2043 }
2044
2045 /* -bf: Run user filter test
059ec3d9
PH
2046 -bfd: Set domain for filter testing
2047 -bfl: Set local part for filter testing
2048 -bfp: Set prefix for filter testing
2049 -bfs: Set suffix for filter testing
2050 */
2051
f05da2e8 2052 else if (*argrest == 'f')
059ec3d9 2053 {
f05da2e8 2054 if (*(++argrest) == 0)
059ec3d9 2055 {
34e86e20 2056 filter_test |= checking = FTEST_USER;
f05da2e8 2057 if (++i < argc) filter_test_ufile = argv[i]; else
9af3c549 2058 exim_fail("exim: file name expected after %s\n", argv[i-1]);
059ec3d9
PH
2059 }
2060 else
2061 {
2062 if (++i >= argc)
9af3c549 2063 exim_fail("exim: string expected after %s\n", arg);
059ec3d9
PH
2064 if (Ustrcmp(argrest, "d") == 0) ftest_domain = argv[i];
2065 else if (Ustrcmp(argrest, "l") == 0) ftest_localpart = argv[i];
2066 else if (Ustrcmp(argrest, "p") == 0) ftest_prefix = argv[i];
2067 else if (Ustrcmp(argrest, "s") == 0) ftest_suffix = argv[i];
2068 else { badarg = TRUE; break; }
2069 }
2070 }
2071
2072 /* -bh: Host checking - an IP address must follow. */
2073
2074 else if (Ustrcmp(argrest, "h") == 0 || Ustrcmp(argrest, "hc") == 0)
2075 {
2076 if (++i >= argc) { badarg = TRUE; break; }
2077 sender_host_address = argv[i];
8768d548
JH
2078 host_checking = checking = f.log_testing_mode = TRUE;
2079 f.host_checking_callout = argrest[1] == 'c';
1a6230a3 2080 message_logs = FALSE;
059ec3d9
PH
2081 }
2082
2083 /* -bi: This option is used by sendmail to initialize *the* alias file,
2084 though it has the -oA option to specify a different file. Exim has no
2085 concept of *the* alias file, but since Sun's YP make script calls
2086 sendmail this way, some support must be provided. */
2087
2088 else if (Ustrcmp(argrest, "i") == 0) bi_option = TRUE;
2089
98a90c36
PP
2090 /* -bI: provide information, of the type to follow after a colon.
2091 This is an Exim flag. */
2092
2093 else if (argrest[0] == 'I' && Ustrlen(argrest) >= 2 && argrest[1] == ':')
2094 {
2095 uschar *p = &argrest[2];
2096 info_flag = CMDINFO_HELP;
2097 if (Ustrlen(p))
2098 {
2099 if (strcmpic(p, CUS"sieve") == 0)
2100 {
2101 info_flag = CMDINFO_SIEVE;
2102 info_stdout = TRUE;
2103 }
36a3ae5f
PP
2104 else if (strcmpic(p, CUS"dscp") == 0)
2105 {
2106 info_flag = CMDINFO_DSCP;
2107 info_stdout = TRUE;
2108 }
98a90c36
PP
2109 else if (strcmpic(p, CUS"help") == 0)
2110 {
2111 info_stdout = TRUE;
2112 }
2113 }
2114 }
2115
059ec3d9
PH
2116 /* -bm: Accept and deliver message - the default option. Reinstate
2117 receiving_message, which got turned off for all -b options. */
2118
2119 else if (Ustrcmp(argrest, "m") == 0) receiving_message = TRUE;
2120
8544e77a
PP
2121 /* -bmalware: test the filename given for malware */
2122
2123 else if (Ustrcmp(argrest, "malware") == 0)
2124 {
2125 if (++i >= argc) { badarg = TRUE; break; }
34e86e20 2126 checking = TRUE;
8544e77a
PP
2127 malware_test_file = argv[i];
2128 }
2129
059ec3d9
PH
2130 /* -bnq: For locally originating messages, do not qualify unqualified
2131 addresses. In the envelope, this causes errors; in header lines they
2132 just get left. */
2133
2134 else if (Ustrcmp(argrest, "nq") == 0)
2135 {
8768d548
JH
2136 f.allow_unqualified_sender = FALSE;
2137 f.allow_unqualified_recipient = FALSE;
059ec3d9
PH
2138 }
2139
2140 /* -bpxx: List the contents of the mail queue, in various forms. If
2141 the option is -bpc, just a queue count is needed. Otherwise, if the
2142 first letter after p is r, then order is random. */
2143
2144 else if (*argrest == 'p')
2145 {
2146 if (*(++argrest) == 'c')
2147 {
2148 count_queue = TRUE;
2149 if (*(++argrest) != 0) badarg = TRUE;
2150 break;
2151 }
2152
2153 if (*argrest == 'r')
2154 {
2155 list_queue_option = 8;
2156 argrest++;
2157 }
2158 else list_queue_option = 0;
2159
2160 list_queue = TRUE;
2161
2162 /* -bp: List the contents of the mail queue, top-level only */
2163
2164 if (*argrest == 0) {}
2165
2166 /* -bpu: List the contents of the mail queue, top-level undelivered */
2167
2168 else if (Ustrcmp(argrest, "u") == 0) list_queue_option += 1;
2169
2170 /* -bpa: List the contents of the mail queue, including all delivered */
2171
2172 else if (Ustrcmp(argrest, "a") == 0) list_queue_option += 2;
2173
2174 /* Unknown after -bp[r] */
2175
2176 else
2177 {
2178 badarg = TRUE;
2179 break;
2180 }
2181 }
2182
2183
2184 /* -bP: List the configuration variables given as the address list.
2185 Force -v, so configuration errors get displayed. */
2186
2187 else if (Ustrcmp(argrest, "P") == 0)
2188 {
bf3c2c6b
HSHR
2189 /* -bP config: we need to setup here, because later,
2190 * when list_options is checked, the config is read already */
2191 if (argv[i+1] && Ustrcmp(argv[i+1], "config") == 0)
2192 {
2193 list_config = TRUE;
2194 readconf_save_config(version_string);
2195 }
2196 else
2197 {
2198 list_options = TRUE;
2199 debug_selector |= D_v;
2200 debug_file = stderr;
2201 }
059ec3d9
PH
2202 }
2203
2204 /* -brt: Test retry configuration lookup */
2205
2206 else if (Ustrcmp(argrest, "rt") == 0)
2207 {
34e86e20 2208 checking = TRUE;
059ec3d9
PH
2209 test_retry_arg = i + 1;
2210 goto END_ARG;
2211 }
2212
2213 /* -brw: Test rewrite configuration */
2214
2215 else if (Ustrcmp(argrest, "rw") == 0)
2216 {
34e86e20 2217 checking = TRUE;
059ec3d9
PH
2218 test_rewrite_arg = i + 1;
2219 goto END_ARG;
2220 }
2221
2222 /* -bS: Read SMTP commands on standard input, but produce no replies -
2223 all errors are reported by sending messages. */
2224
2225 else if (Ustrcmp(argrest, "S") == 0)
2226 smtp_input = smtp_batched_input = receiving_message = TRUE;
2227
2228 /* -bs: Read SMTP commands on standard input and produce SMTP replies
2229 on standard output. */
2230
2231 else if (Ustrcmp(argrest, "s") == 0) smtp_input = receiving_message = TRUE;
2232
2233 /* -bt: address testing mode */
2234
2235 else if (Ustrcmp(argrest, "t") == 0)
8768d548 2236 f.address_test_mode = checking = f.log_testing_mode = TRUE;
059ec3d9
PH
2237
2238 /* -bv: verify addresses */
2239
2240 else if (Ustrcmp(argrest, "v") == 0)
8768d548 2241 verify_address_mode = checking = f.log_testing_mode = TRUE;
059ec3d9
PH
2242
2243 /* -bvs: verify sender addresses */
2244
2245 else if (Ustrcmp(argrest, "vs") == 0)
2246 {
8768d548 2247 verify_address_mode = checking = f.log_testing_mode = TRUE;
059ec3d9
PH
2248 verify_as_sender = TRUE;
2249 }
2250
2251 /* -bV: Print version string and support details */
2252
2253 else if (Ustrcmp(argrest, "V") == 0)
2254 {
2255 printf("Exim version %s #%s built %s\n", version_string,
2256 version_cnumber, version_date);
2257 printf("%s\n", CS version_copyright);
2258 version_printed = TRUE;
2259 show_whats_supported(stdout);
8768d548 2260 f.log_testing_mode = TRUE;
059ec3d9
PH
2261 }
2262
9ee44efb
PP
2263 /* -bw: inetd wait mode, accept a listening socket as stdin */
2264
2265 else if (*argrest == 'w')
2266 {
8768d548
JH
2267 f.inetd_wait_mode = TRUE;
2268 f.background_daemon = FALSE;
2269 f.daemon_listen = TRUE;
9ee44efb 2270 if (*(++argrest) != '\0')
9af3c549
JH
2271 if ((inetd_wait_timeout = readconf_readtime(argrest, 0, FALSE)) <= 0)
2272 exim_fail("exim: bad time value %s: abandoned\n", argv[i]);
9ee44efb
PP
2273 }
2274
059ec3d9
PH
2275 else badarg = TRUE;
2276 break;
2277
2278
2279 /* -C: change configuration file list; ignore if it isn't really
2280 a change! Enforce a prefix check if required. */
2281
2282 case 'C':
2283 if (*argrest == 0)
2284 {
2285 if(++i < argc) argrest = argv[i]; else
2286 { badarg = TRUE; break; }
2287 }
2288 if (Ustrcmp(config_main_filelist, argrest) != 0)
2289 {
2290 #ifdef ALT_CONFIG_PREFIX
2291 int sep = 0;
2292 int len = Ustrlen(ALT_CONFIG_PREFIX);
863bd541 2293 const uschar *list = argrest;
059ec3d9
PH
2294 uschar *filename;
2295 while((filename = string_nextinlist(&list, &sep, big_buffer,
2296 big_buffer_size)) != NULL)
2297 {
2298 if ((Ustrlen(filename) < len ||
2299 Ustrncmp(filename, ALT_CONFIG_PREFIX, len) != 0 ||
2300 Ustrstr(filename, "/../") != NULL) &&
2301 (Ustrcmp(filename, "/dev/null") != 0 || real_uid != root_uid))
9af3c549 2302 exim_fail("-C Permission denied\n");
059ec3d9
PH
2303 }
2304 #endif
261dc43e
DW
2305 if (real_uid != root_uid)
2306 {
90b6341f 2307 #ifdef TRUSTED_CONFIG_LIST
261dc43e 2308
90b6341f
DW
2309 if (real_uid != exim_uid
2310 #ifdef CONFIGURE_OWNER
2311 && real_uid != config_uid
2312 #endif
2313 )
8768d548 2314 f.trusted_config = FALSE;
261dc43e
DW
2315 else
2316 {
90b6341f 2317 FILE *trust_list = Ufopen(TRUSTED_CONFIG_LIST, "rb");
261dc43e
DW
2318 if (trust_list)
2319 {
2320 struct stat statbuf;
2321
2322 if (fstat(fileno(trust_list), &statbuf) != 0 ||
2323 (statbuf.st_uid != root_uid /* owner not root */
2324 #ifdef CONFIGURE_OWNER
2325 && statbuf.st_uid != config_uid /* owner not the special one */
2326 #endif
2327 ) || /* or */
2328 (statbuf.st_gid != root_gid /* group not root */
2329 #ifdef CONFIGURE_GROUP
2330 && statbuf.st_gid != config_gid /* group not the special one */
2331 #endif
2332 && (statbuf.st_mode & 020) != 0 /* group writeable */
2333 ) || /* or */
2334 (statbuf.st_mode & 2) != 0) /* world writeable */
2335 {
8768d548 2336 f.trusted_config = FALSE;
261dc43e
DW
2337 fclose(trust_list);
2338 }
2339 else
2340 {
2341 /* Well, the trust list at least is up to scratch... */
f3ebb786 2342 rmark reset_point = store_mark();
90b6341f
DW
2343 uschar *trusted_configs[32];
2344 int nr_configs = 0;
261dc43e
DW
2345 int i = 0;
2346
2347 while (Ufgets(big_buffer, big_buffer_size, trust_list))
2348 {
2349 uschar *start = big_buffer, *nl;
2350 while (*start && isspace(*start))
2351 start++;
1e83d68b 2352 if (*start != '/')
261dc43e
DW
2353 continue;
2354 nl = Ustrchr(start, '\n');
2355 if (nl)
2356 *nl = 0;
90b6341f
DW
2357 trusted_configs[nr_configs++] = string_copy(start);
2358 if (nr_configs == 32)
261dc43e
DW
2359 break;
2360 }
2361 fclose(trust_list);
2362
90b6341f 2363 if (nr_configs)
261dc43e
DW
2364 {
2365 int sep = 0;
55414b25 2366 const uschar *list = argrest;
261dc43e 2367 uschar *filename;
8768d548 2368 while (f.trusted_config && (filename = string_nextinlist(&list,
261dc43e
DW
2369 &sep, big_buffer, big_buffer_size)) != NULL)
2370 {
90b6341f 2371 for (i=0; i < nr_configs; i++)
90b6341f 2372 if (Ustrcmp(filename, trusted_configs[i]) == 0)
261dc43e 2373 break;
90b6341f 2374 if (i == nr_configs)
261dc43e 2375 {
8768d548 2376 f.trusted_config = FALSE;
261dc43e
DW
2377 break;
2378 }
2379 }
2380 }
f3ebb786 2381 else /* No valid prefixes found in trust_list file. */
8768d548 2382 f.trusted_config = FALSE;
f3ebb786 2383 store_reset(reset_point);
261dc43e
DW
2384 }
2385 }
f3ebb786 2386 else /* Could not open trust_list file. */
8768d548 2387 f.trusted_config = FALSE;
261dc43e
DW
2388 }
2389 #else
2390 /* Not root; don't trust config */
8768d548 2391 f.trusted_config = FALSE;
261dc43e
DW
2392 #endif
2393 }
059ec3d9
PH
2394
2395 config_main_filelist = argrest;
8768d548 2396 f.config_changed = TRUE;
059ec3d9
PH
2397 }
2398 break;
2399
2400
2401 /* -D: set up a macro definition */
2402
2403 case 'D':
9af3c549
JH
2404#ifdef DISABLE_D_OPTION
2405 exim_fail("exim: -D is not available in this Exim binary\n");
2406#else
059ec3d9
PH
2407 {
2408 int ptr = 0;
059ec3d9
PH
2409 macro_item *m;
2410 uschar name[24];
2411 uschar *s = argrest;
2412
4ab69ec7 2413 opt_D_used = TRUE;
059ec3d9
PH
2414 while (isspace(*s)) s++;
2415
2416 if (*s < 'A' || *s > 'Z')
9af3c549 2417 exim_fail("exim: macro name set by -D must start with "
059ec3d9 2418 "an upper case letter\n");
059ec3d9
PH
2419
2420 while (isalnum(*s) || *s == '_')
2421 {
2422 if (ptr < sizeof(name)-1) name[ptr++] = *s;
2423 s++;
2424 }
2425 name[ptr] = 0;
2426 if (ptr == 0) { badarg = TRUE; break; }
2427 while (isspace(*s)) s++;
2428 if (*s != 0)
2429 {
2430 if (*s++ != '=') { badarg = TRUE; break; }
2431 while (isspace(*s)) s++;
2432 }
2433
85e03244 2434 for (m = macros_user; m; m = m->next)
1a7c9a48 2435 if (Ustrcmp(m->name, name) == 0)
9af3c549 2436 exim_fail("exim: duplicated -D in command line\n");
059ec3d9 2437
85e03244 2438 m = macro_create(name, s, TRUE);
059ec3d9
PH
2439
2440 if (clmacro_count >= MAX_CLMACROS)
9af3c549 2441 exim_fail("exim: too many -D options on command line\n");
f3ebb786
JH
2442 clmacros[clmacro_count++] =
2443 string_sprintf("-D%s=%s", m->name, m->replacement);
059ec3d9
PH
2444 }
2445 #endif
2446 break;
2447
2448 /* -d: Set debug level (see also -v below) or set the drop_cr option.
8e669ac1 2449 The latter is now a no-op, retained for compatibility only. If -dd is used,
3d235903 2450 debugging subprocesses of the daemon is disabled. */
059ec3d9
PH
2451
2452 case 'd':
2453 if (Ustrcmp(argrest, "ropcr") == 0)
2454 {
2455 /* drop_cr = TRUE; */
2456 }
2457
2458 /* Use an intermediate variable so that we don't set debugging while
2459 decoding the debugging bits. */
2460
2461 else
2462 {
2463 unsigned int selector = D_default;
2464 debug_selector = 0;
2465 debug_file = NULL;
3d235903
PH
2466 if (*argrest == 'd')
2467 {
8768d548 2468 f.debug_daemon = TRUE;
3d235903
PH
2469 argrest++;
2470 }
059ec3d9 2471 if (*argrest != 0)
6c6d6e48
TF
2472 decode_bits(&selector, 1, debug_notall, argrest,
2473 debug_options, debug_options_count, US"debug", 0);
059ec3d9
PH
2474 debug_selector = selector;
2475 }
2476 break;
2477
2478
2479 /* -E: This is a local error message. This option is not intended for
2480 external use at all, but is not restricted to trusted callers because it
2481 does no harm (just suppresses certain error messages) and if Exim is run
2482 not setuid root it won't always be trusted when it generates error
2483 messages using this option. If there is a message id following -E, point
2484 message_reference at it, for logging. */
2485
2486 case 'E':
8768d548 2487 f.local_error_message = TRUE;
059ec3d9
PH
2488 if (mac_ismsgid(argrest)) message_reference = argrest;
2489 break;
2490
2491
2492 /* -ex: The vacation program calls sendmail with the undocumented "-eq"
2493 option, so it looks as if historically the -oex options are also callable
2494 without the leading -o. So we have to accept them. Before the switch,
2495 anything starting -oe has been converted to -e. Exim does not support all
2496 of the sendmail error options. */
2497
2498 case 'e':
2499 if (Ustrcmp(argrest, "e") == 0)
2500 {
2501 arg_error_handling = ERRORS_SENDER;
2502 errors_sender_rc = EXIT_SUCCESS;
2503 }
2504 else if (Ustrcmp(argrest, "m") == 0) arg_error_handling = ERRORS_SENDER;
2505 else if (Ustrcmp(argrest, "p") == 0) arg_error_handling = ERRORS_STDERR;
2506 else if (Ustrcmp(argrest, "q") == 0) arg_error_handling = ERRORS_STDERR;
2507 else if (Ustrcmp(argrest, "w") == 0) arg_error_handling = ERRORS_SENDER;
2508 else badarg = TRUE;
2509 break;
2510
2511
2512 /* -F: Set sender's full name, used instead of the gecos entry from
2513 the password file. Since users can usually alter their gecos entries,
2514 there's no security involved in using this instead. The data can follow
2515 the -F or be in the next argument. */
2516
2517 case 'F':
2518 if (*argrest == 0)
2519 {
2520 if(++i < argc) argrest = argv[i]; else
2521 { badarg = TRUE; break; }
2522 }
2523 originator_name = argrest;
8768d548 2524 f.sender_name_forced = TRUE;
059ec3d9
PH
2525 break;
2526
2527
2528 /* -f: Set sender's address - this value is only actually used if Exim is
2529 run by a trusted user, or if untrusted_set_sender is set and matches the
2530 address, except that the null address can always be set by any user. The
2531 test for this happens later, when the value given here is ignored when not
2532 permitted. For an untrusted user, the actual sender is still put in Sender:
2533 if it doesn't match the From: header (unless no_local_from_check is set).
2534 The data can follow the -f or be in the next argument. The -r switch is an
2535 obsolete form of -f but since there appear to be programs out there that
2536 use anything that sendmail has ever supported, better accept it - the
2537 synonymizing is done before the switch above.
2538
2539 At this stage, we must allow domain literal addresses, because we don't
2540 know what the setting of allow_domain_literals is yet. Ditto for trailing
2541 dots and strip_trailing_dot. */
2542
2543 case 'f':
2544 {
250b6871 2545 int dummy_start, dummy_end;
059ec3d9
PH
2546 uschar *errmess;
2547 if (*argrest == 0)
2548 {
2549 if (i+1 < argc) argrest = argv[++i]; else
2550 { badarg = TRUE; break; }
2551 }
2552 if (*argrest == 0)
f3ebb786 2553 *(sender_address = store_get(1, FALSE)) = '\0'; /* Ensure writeable memory */
059ec3d9
PH
2554 else
2555 {
2556 uschar *temp = argrest + Ustrlen(argrest) - 1;
2557 while (temp >= argrest && isspace(*temp)) temp--;
2558 if (temp >= argrest && *temp == '.') f_end_dot = TRUE;
2559 allow_domain_literals = TRUE;
2560 strip_trailing_dot = TRUE;
8c5d388a 2561#ifdef SUPPORT_I18N
250b6871
JH
2562 allow_utf8_domains = TRUE;
2563#endif
2564 sender_address = parse_extract_address(argrest, &errmess,
2565 &dummy_start, &dummy_end, &sender_address_domain, TRUE);
f3ebb786 2566 sender_address = string_copy_taint(sender_address, TRUE);
8c5d388a 2567#ifdef SUPPORT_I18N
250b6871
JH
2568 message_smtputf8 = string_is_utf8(sender_address);
2569 allow_utf8_domains = FALSE;
2570#endif
059ec3d9
PH
2571 allow_domain_literals = FALSE;
2572 strip_trailing_dot = FALSE;
9af3c549
JH
2573 if (!sender_address)
2574 exim_fail("exim: bad -f address \"%s\": %s\n", argrest, errmess);
059ec3d9 2575 }
8768d548 2576 f.sender_address_forced = TRUE;
059ec3d9
PH
2577 }
2578 break;
2579
a3fb9793 2580 /* -G: sendmail invocation to specify that it's a gateway submission and
f4ee74ac
PP
2581 sendmail may complain about problems instead of fixing them.
2582 We make it equivalent to an ACL "control = suppress_local_fixups" and do
2583 not at this time complain about problems. */
059ec3d9
PH
2584
2585 case 'G':
f4ee74ac 2586 flag_G = TRUE;
059ec3d9
PH
2587 break;
2588
2589 /* -h: Set the hop count for an incoming message. Exim does not currently
2590 support this; it always computes it by counting the Received: headers.
2591 To put it in will require a change to the spool header file format. */
2592
2593 case 'h':
2594 if (*argrest == 0)
2595 {
2596 if(++i < argc) argrest = argv[i]; else
2597 { badarg = TRUE; break; }
2598 }
2599 if (!isdigit(*argrest)) badarg = TRUE;
2600 break;
2601
2602
2603 /* -i: Set flag so dot doesn't end non-SMTP input (same as -oi, seems
2604 not to be documented for sendmail but mailx (at least) uses it) */
2605
2606 case 'i':
8768d548 2607 if (*argrest == 0) f.dot_ends = FALSE; else badarg = TRUE;
059ec3d9
PH
2608 break;
2609
2610
a3fb9793
PP
2611 /* -L: set the identifier used for syslog; equivalent to setting
2612 syslog_processname in the config file, but needs to be an admin option. */
2613
2614 case 'L':
2615 if (*argrest == '\0')
2616 {
2617 if(++i < argc) argrest = argv[i]; else
2618 { badarg = TRUE; break; }
2619 }
9af3c549
JH
2620 if ((sz = Ustrlen(argrest)) > 32)
2621 exim_fail("exim: the -L syslog name is too long: \"%s\"\n", argrest);
a3fb9793 2622 if (sz < 1)
9af3c549 2623 exim_fail("exim: the -L syslog name is too short\n");
a3fb9793
PP
2624 cmdline_syslog_name = argrest;
2625 break;
2626
059ec3d9
PH
2627 case 'M':
2628 receiving_message = FALSE;
2629
2630 /* -MC: continue delivery of another message via an existing open
2631 file descriptor. This option is used for an internal call by the
2632 smtp transport when there is a pending message waiting to go to an
2633 address to which it has got a connection. Five subsequent arguments are
2634 required: transport name, host name, IP address, sequence number, and
2635 message_id. Transports may decline to create new processes if the sequence
2636 number gets too big. The channel is stdin. This (-MC) must be the last
2637 argument. There's a subsequent check that the real-uid is privileged.
2638
2639 If we are running in the test harness. delay for a bit, to let the process
2640 that set this one up complete. This makes for repeatability of the logging,
2641 etc. output. */
2642
2643 if (Ustrcmp(argrest, "C") == 0)
2644 {
41c7c167
PH
2645 union sockaddr_46 interface_sock;
2646 EXIM_SOCKLEN_T size = sizeof(interface_sock);
2647
059ec3d9 2648 if (argc != i + 6)
9af3c549 2649 exim_fail("exim: too many or too few arguments after -MC\n");
059ec3d9
PH
2650
2651 if (msg_action_arg >= 0)
9af3c549 2652 exim_fail("exim: incompatible arguments\n");
059ec3d9
PH
2653
2654 continue_transport = argv[++i];
2655 continue_hostname = argv[++i];
2656 continue_host_address = argv[++i];
2657 continue_sequence = Uatoi(argv[++i]);
2658 msg_action = MSG_DELIVER;
2659 msg_action_arg = ++i;
2660 forced_delivery = TRUE;
2661 queue_run_pid = passed_qr_pid;
2662 queue_run_pipe = passed_qr_pipe;
2663
2664 if (!mac_ismsgid(argv[i]))
9af3c549 2665 exim_fail("exim: malformed message id %s after -MC option\n",
059ec3d9 2666 argv[i]);
059ec3d9 2667
875512a3
JH
2668 /* Set up $sending_ip_address and $sending_port, unless proxied */
2669
5013d912 2670 if (!continue_proxy_cipher)
875512a3
JH
2671 if (getsockname(fileno(stdin), (struct sockaddr *)(&interface_sock),
2672 &size) == 0)
2673 sending_ip_address = host_ntoa(-1, &interface_sock, NULL,
2674 &sending_port);
2675 else
9af3c549 2676 exim_fail("exim: getsockname() failed after -MC option: %s\n",
875512a3 2677 strerror(errno));
41c7c167 2678
9f01e50d 2679 testharness_pause_ms(500);
059ec3d9
PH
2680 break;
2681 }
2682
2d14f397
JH
2683 else if (*argrest == 'C' && argrest[1] && !argrest[2])
2684 {
875512a3 2685 switch(argrest[1])
2d14f397 2686 {
059ec3d9
PH
2687 /* -MCA: set the smtp_authenticated flag; this is useful only when it
2688 precedes -MC (see above). The flag indicates that the host to which
2689 Exim is connected has accepted an AUTH sequence. */
2690
8768d548 2691 case 'A': f.smtp_authenticated = TRUE; break;
059ec3d9 2692
6c1c3d1d
WB
2693 /* -MCD: set the smtp_use_dsn flag; this indicates that the host
2694 that exim is connected to supports the esmtp extension DSN */
28b3821f 2695
14de8063 2696 case 'D': smtp_peer_options |= OPTION_DSN; break;
6c1c3d1d 2697
e37f8a84 2698 /* -MCG: set the queue name, to a non-default value */
28b3821f 2699
2d14f397
JH
2700 case 'G': if (++i < argc) queue_name = string_copy(argv[i]);
2701 else badarg = TRUE;
2702 break;
2703
2704 /* -MCK: the peer offered CHUNKING. Must precede -MC */
2705
14de8063 2706 case 'K': smtp_peer_options |= OPTION_CHUNKING; break;
28b3821f 2707
059ec3d9
PH
2708 /* -MCP: set the smtp_use_pipelining flag; this is useful only when
2709 it preceded -MC (see above) */
2710
14de8063 2711 case 'P': smtp_peer_options |= OPTION_PIPE; break;
059ec3d9
PH
2712
2713 /* -MCQ: pass on the pid of the queue-running process that started
2714 this chain of deliveries and the fd of its synchronizing pipe; this
2715 is useful only when it precedes -MC (see above) */
2716
2d14f397
JH
2717 case 'Q': if (++i < argc) passed_qr_pid = (pid_t)(Uatol(argv[i]));
2718 else badarg = TRUE;
2719 if (++i < argc) passed_qr_pipe = (int)(Uatol(argv[i]));
2720 else badarg = TRUE;
2721 break;
059ec3d9
PH
2722
2723 /* -MCS: set the smtp_use_size flag; this is useful only when it
2724 precedes -MC (see above) */
2725
14de8063 2726 case 'S': smtp_peer_options |= OPTION_SIZE; break;
059ec3d9 2727
01603eec 2728#ifndef DISABLE_TLS
875512a3 2729 /* -MCt: similar to -MCT below but the connection is still open
aded2255 2730 via a proxy process which handles the TLS context and coding.
5013d912
JH
2731 Require three arguments for the proxied local address and port,
2732 and the TLS cipher. */
875512a3 2733
5013d912 2734 case 't': if (++i < argc) sending_ip_address = argv[i];
875512a3
JH
2735 else badarg = TRUE;
2736 if (++i < argc) sending_port = (int)(Uatol(argv[i]));
2737 else badarg = TRUE;
5013d912
JH
2738 if (++i < argc) continue_proxy_cipher = argv[i];
2739 else badarg = TRUE;
875512a3
JH
2740 /*FALLTHROUGH*/
2741
059ec3d9
PH
2742 /* -MCT: set the tls_offered flag; this is useful only when it
2743 precedes -MC (see above). The flag indicates that the host to which
2744 Exim is connected has offered TLS support. */
2745
14de8063 2746 case 'T': smtp_peer_options |= OPTION_TLS; break;
2d14f397
JH
2747#endif
2748
2749 default: badarg = TRUE; break;
2750 }
8ac90765
JH
2751 break;
2752 }
2753
059ec3d9
PH
2754 /* -M[x]: various operations on the following list of message ids:
2755 -M deliver the messages, ignoring next retry times and thawing
2756 -Mc deliver the messages, checking next retry times, no thawing
2757 -Mf freeze the messages
2758 -Mg give up on the messages
2759 -Mt thaw the messages
2760 -Mrm remove the messages
2761 In the above cases, this must be the last option. There are also the
2762 following options which are followed by a single message id, and which
2763 act on that message. Some of them use the "recipient" addresses as well.
2764 -Mar add recipient(s)
2765 -Mmad mark all recipients delivered
2766 -Mmd mark recipients(s) delivered
2767 -Mes edit sender
0ef732d9 2768 -Mset load a message for use with -be
059ec3d9 2769 -Mvb show body
a96603a0 2770 -Mvc show copy (of whole message, in RFC 2822 format)
059ec3d9
PH
2771 -Mvh show header
2772 -Mvl show log
2773 */
2774
2775 else if (*argrest == 0)
2776 {
2777 msg_action = MSG_DELIVER;
8768d548 2778 forced_delivery = f.deliver_force_thaw = TRUE;
059ec3d9
PH
2779 }
2780 else if (Ustrcmp(argrest, "ar") == 0)
2781 {
2782 msg_action = MSG_ADD_RECIPIENT;
2783 one_msg_action = TRUE;
2784 }
2785 else if (Ustrcmp(argrest, "c") == 0) msg_action = MSG_DELIVER;
2786 else if (Ustrcmp(argrest, "es") == 0)
2787 {
2788 msg_action = MSG_EDIT_SENDER;
2789 one_msg_action = TRUE;
2790 }
2791 else if (Ustrcmp(argrest, "f") == 0) msg_action = MSG_FREEZE;
2792 else if (Ustrcmp(argrest, "g") == 0)
2793 {
2794 msg_action = MSG_DELIVER;
2795 deliver_give_up = TRUE;
2796 }
fc7bae7f
JH
2797 else if (Ustrcmp(argrest, "G") == 0)
2798 {
2799 msg_action = MSG_SETQUEUE;
2800 queue_name_dest = argv[++i];
2801 }
059ec3d9
PH
2802 else if (Ustrcmp(argrest, "mad") == 0)
2803 {
2804 msg_action = MSG_MARK_ALL_DELIVERED;
2805 }
2806 else if (Ustrcmp(argrest, "md") == 0)
2807 {
2808 msg_action = MSG_MARK_DELIVERED;
2809 one_msg_action = TRUE;
2810 }
2811 else if (Ustrcmp(argrest, "rm") == 0) msg_action = MSG_REMOVE;
0ef732d9
PH
2812 else if (Ustrcmp(argrest, "set") == 0)
2813 {
2814 msg_action = MSG_LOAD;
2815 one_msg_action = TRUE;
2816 }
059ec3d9
PH
2817 else if (Ustrcmp(argrest, "t") == 0) msg_action = MSG_THAW;
2818 else if (Ustrcmp(argrest, "vb") == 0)
2819 {
2820 msg_action = MSG_SHOW_BODY;
2821 one_msg_action = TRUE;
2822 }
a96603a0
PH
2823 else if (Ustrcmp(argrest, "vc") == 0)
2824 {
2825 msg_action = MSG_SHOW_COPY;
2826 one_msg_action = TRUE;
2827 }
059ec3d9
PH
2828 else if (Ustrcmp(argrest, "vh") == 0)
2829 {
2830 msg_action = MSG_SHOW_HEADER;
2831 one_msg_action = TRUE;
2832 }
2833 else if (Ustrcmp(argrest, "vl") == 0)
2834 {
2835 msg_action = MSG_SHOW_LOG;
2836 one_msg_action = TRUE;
2837 }
2838 else { badarg = TRUE; break; }
2839
2840 /* All the -Mxx options require at least one message id. */
2841
2842 msg_action_arg = i + 1;
2843 if (msg_action_arg >= argc)
9af3c549 2844 exim_fail("exim: no message ids given after %s option\n", arg);
059ec3d9
PH
2845
2846 /* Some require only message ids to follow */
2847
2848 if (!one_msg_action)
2849 {
d7978c0f 2850 for (int j = msg_action_arg; j < argc; j++) if (!mac_ismsgid(argv[j]))
9af3c549 2851 exim_fail("exim: malformed message id %s after %s option\n",
059ec3d9 2852 argv[j], arg);
059ec3d9
PH
2853 goto END_ARG; /* Remaining args are ids */
2854 }
2855
2856 /* Others require only one message id, possibly followed by addresses,
2857 which will be handled as normal arguments. */
2858
2859 else
2860 {
2861 if (!mac_ismsgid(argv[msg_action_arg]))
9af3c549 2862 exim_fail("exim: malformed message id %s after %s option\n",
059ec3d9 2863 argv[msg_action_arg], arg);
059ec3d9
PH
2864 i++;
2865 }
2866 break;
2867
2868
2869 /* Some programs seem to call the -om option without the leading o;
2870 for sendmail it askes for "me too". Exim always does this. */
2871
2872 case 'm':
2873 if (*argrest != 0) badarg = TRUE;
2874 break;
2875
2876
2877 /* -N: don't do delivery - a debugging option that stops transports doing
2878 their thing. It implies debugging at the D_v level. */
2879
2880 case 'N':
2881 if (*argrest == 0)
2882 {
8768d548 2883 f.dont_deliver = TRUE;
059ec3d9
PH
2884 debug_selector |= D_v;
2885 debug_file = stderr;
2886 }
2887 else badarg = TRUE;
2888 break;
2889
2890
12f69989
PP
2891 /* -n: This means "don't alias" in sendmail, apparently.
2892 For normal invocations, it has no effect.
2893 It may affect some other options. */
059ec3d9
PH
2894
2895 case 'n':
12f69989 2896 flag_n = TRUE;
059ec3d9
PH
2897 break;
2898
2899 /* -O: Just ignore it. In sendmail, apparently -O option=value means set
2900 option to the specified value. This form uses long names. We need to handle
2901 -O option=value and -Ooption=value. */
2902
2903 case 'O':
2904 if (*argrest == 0)
2905 {
2906 if (++i >= argc)
9af3c549 2907 exim_fail("exim: string expected after -O\n");
059ec3d9
PH
2908 }
2909 break;
2910
2911 case 'o':
2912
2913 /* -oA: Set an argument for the bi command (sendmail's "alternate alias
2914 file" option). */
2915
2916 if (*argrest == 'A')
2917 {
2918 alias_arg = argrest + 1;
2919 if (alias_arg[0] == 0)
2920 {
2921 if (i+1 < argc) alias_arg = argv[++i]; else
9af3c549 2922 exim_fail("exim: string expected after -oA\n");
059ec3d9
PH
2923 }
2924 }
2925
2926 /* -oB: Set a connection message max value for remote deliveries */
2927
2928 else if (*argrest == 'B')
2929 {
2930 uschar *p = argrest + 1;
2931 if (p[0] == 0)
2932 {
2933 if (i+1 < argc && isdigit((argv[i+1][0]))) p = argv[++i]; else
2934 {
2935 connection_max_messages = 1;
2936 p = NULL;
2937 }
2938 }
2939
2940 if (p != NULL)
2941 {
2942 if (!isdigit(*p))
9af3c549 2943 exim_fail("exim: number expected after -oB\n");
059ec3d9
PH
2944 connection_max_messages = Uatoi(p);
2945 }
2946 }
2947
2948 /* -odb: background delivery */
2949
2950 else if (Ustrcmp(argrest, "db") == 0)
2951 {
8768d548 2952 f.synchronous_delivery = FALSE;
059ec3d9
PH
2953 arg_queue_only = FALSE;
2954 queue_only_set = TRUE;
2955 }
2956
2957 /* -odf: foreground delivery (smail-compatible option); same effect as
2958 -odi: interactive (synchronous) delivery (sendmail-compatible option)
2959 */
2960
2961 else if (Ustrcmp(argrest, "df") == 0 || Ustrcmp(argrest, "di") == 0)
2962 {
8768d548 2963 f.synchronous_delivery = TRUE;
059ec3d9
PH
2964 arg_queue_only = FALSE;
2965 queue_only_set = TRUE;
2966 }
2967
2968 /* -odq: queue only */
2969
2970 else if (Ustrcmp(argrest, "dq") == 0)
2971 {
8768d548 2972 f.synchronous_delivery = FALSE;
059ec3d9
PH
2973 arg_queue_only = TRUE;
2974 queue_only_set = TRUE;
2975 }
2976
2977 /* -odqs: queue SMTP only - do local deliveries and remote routing,
2978 but no remote delivery */
2979
2980 else if (Ustrcmp(argrest, "dqs") == 0)
2981 {
8768d548 2982 f.queue_smtp = TRUE;
059ec3d9
PH
2983 arg_queue_only = FALSE;
2984 queue_only_set = TRUE;
2985 }
2986
2987 /* -oex: Sendmail error flags. As these are also accepted without the
2988 leading -o prefix, for compatibility with vacation and other callers,
2989 they are handled with -e above. */
2990
2991 /* -oi: Set flag so dot doesn't end non-SMTP input (same as -i)
2992 -oitrue: Another sendmail syntax for the same */
2993
2994 else if (Ustrcmp(argrest, "i") == 0 ||
2995 Ustrcmp(argrest, "itrue") == 0)
8768d548 2996 f.dot_ends = FALSE;
059ec3d9
PH
2997
2998 /* -oM*: Set various characteristics for an incoming message; actually
2999 acted on for trusted callers only. */
3000
3001 else if (*argrest == 'M')
3002 {
3003 if (i+1 >= argc)
9af3c549 3004 exim_fail("exim: data expected after -o%s\n", argrest);
059ec3d9
PH
3005
3006 /* -oMa: Set sender host address */
3007
3008 if (Ustrcmp(argrest, "Ma") == 0) sender_host_address = argv[++i];
3009
3010 /* -oMaa: Set authenticator name */
3011
3012 else if (Ustrcmp(argrest, "Maa") == 0)
3013 sender_host_authenticated = argv[++i];
3014
3015 /* -oMas: setting authenticated sender */
3016
f3ebb786
JH
3017 else if (Ustrcmp(argrest, "Mas") == 0)
3018 authenticated_sender = string_copy_taint(argv[++i], TRUE);
059ec3d9
PH
3019
3020 /* -oMai: setting authenticated id */
3021
f3ebb786
JH
3022 else if (Ustrcmp(argrest, "Mai") == 0)
3023 authenticated_id = string_copy_taint(argv[++i], TRUE);
059ec3d9
PH
3024
3025 /* -oMi: Set incoming interface address */
3026
3027 else if (Ustrcmp(argrest, "Mi") == 0) interface_address = argv[++i];
3028
d2af03f4
HS
3029 /* -oMm: Message reference */
3030
3031 else if (Ustrcmp(argrest, "Mm") == 0)
3032 {
3033 if (!mac_ismsgid(argv[i+1]))
9af3c549 3034 exim_fail("-oMm must be a valid message ID\n");
8768d548 3035 if (!f.trusted_config)
9af3c549 3036 exim_fail("-oMm must be called by a trusted user/config\n");
d2af03f4
HS
3037 message_reference = argv[++i];
3038 }
3039
059ec3d9
PH
3040 /* -oMr: Received protocol */
3041
65e061b7
HSHR
3042 else if (Ustrcmp(argrest, "Mr") == 0)
3043
3044 if (received_protocol)
9af3c549
JH
3045 exim_fail("received_protocol is set already\n");
3046 else
3047 received_protocol = argv[++i];
059ec3d9
PH
3048
3049 /* -oMs: Set sender host name */
3050
f3ebb786
JH
3051 else if (Ustrcmp(argrest, "Ms") == 0)
3052 sender_host_name = string_copy_taint(argv[++i], TRUE);
059ec3d9
PH
3053
3054 /* -oMt: Set sender ident */
3055
33d73e3b
PH
3056 else if (Ustrcmp(argrest, "Mt") == 0)
3057 {
3058 sender_ident_set = TRUE;
3059 sender_ident = argv[++i];
3060 }
059ec3d9
PH
3061
3062 /* Else a bad argument */
3063
3064 else
3065 {
3066 badarg = TRUE;
3067 break;
3068 }
3069 }
3070
3071 /* -om: Me-too flag for aliases. Exim always does this. Some programs
3072 seem to call this as -m (undocumented), so that is also accepted (see
3073 above). */
3074
3075 else if (Ustrcmp(argrest, "m") == 0) {}
3076
3077 /* -oo: An ancient flag for old-style addresses which still seems to
3078 crop up in some calls (see in SCO). */
3079
3080 else if (Ustrcmp(argrest, "o") == 0) {}
3081
01446a56
JH
3082 /* -oP <name>: set pid file path for daemon
3083 -oPX: delete pid file of daemon */
059ec3d9
PH
3084
3085 else if (Ustrcmp(argrest, "P") == 0)
3086 override_pid_file_path = argv[++i];
3087
01446a56
JH
3088 else if (Ustrcmp(argrest, "PX") == 0)
3089 delete_pid_file();
3090
059ec3d9
PH
3091 /* -or <n>: set timeout for non-SMTP acceptance
3092 -os <n>: set timeout for SMTP acceptance */
3093
3094 else if (*argrest == 'r' || *argrest == 's')
3095 {
3096 int *tp = (*argrest == 'r')?
3097 &arg_receive_timeout : &arg_smtp_receive_timeout;
3098 if (argrest[1] == 0)
3099 {
3100 if (i+1 < argc) *tp= readconf_readtime(argv[++i], 0, FALSE);
3101 }
3102 else *tp = readconf_readtime(argrest + 1, 0, FALSE);
3103 if (*tp < 0)
9af3c549 3104 exim_fail("exim: bad time value %s: abandoned\n", argv[i]);
059ec3d9
PH
3105 }
3106
3107 /* -oX <list>: Override local_interfaces and/or default daemon ports */
3108
3109 else if (Ustrcmp(argrest, "X") == 0)
3110 override_local_interfaces = argv[++i];
3111
3112 /* Unknown -o argument */
3113
3114 else badarg = TRUE;
3115 break;
3116
3117
3118 /* -ps: force Perl startup; -pd force delayed Perl startup */
3119
3120 case 'p':
3121 #ifdef EXIM_PERL
3122 if (*argrest == 's' && argrest[1] == 0)
3123 {
3124 perl_start_option = 1;
3125 break;
3126 }
3127 if (*argrest == 'd' && argrest[1] == 0)
3128 {
3129 perl_start_option = -1;
3130 break;
3131 }
3132 #endif
3133
3134 /* -panythingelse is taken as the Sendmail-compatible argument -prval:sval,
3135 which sets the host protocol and host name */
3136
3137 if (*argrest == 0)
5bfe3b35
JH
3138 if (i+1 < argc)
3139 argrest = argv[++i];
3140 else
059ec3d9 3141 { badarg = TRUE; break; }
059ec3d9
PH
3142
3143 if (*argrest != 0)
3144 {
65e061b7
HSHR
3145 uschar *hn;
3146
3147 if (received_protocol)
9af3c549 3148 exim_fail("received_protocol is set already\n");
65e061b7
HSHR
3149
3150 hn = Ustrchr(argrest, ':');
059ec3d9 3151 if (hn == NULL)
059ec3d9 3152 received_protocol = argrest;
059ec3d9
PH
3153 else
3154 {
90341c71
JH
3155 int old_pool = store_pool;
3156 store_pool = POOL_PERM;
059ec3d9 3157 received_protocol = string_copyn(argrest, hn - argrest);
90341c71 3158 store_pool = old_pool;
059ec3d9
PH
3159 sender_host_name = hn + 1;
3160 }
3161 }
3162 break;
3163
3164
3165 case 'q':
3166 receiving_message = FALSE;
3cc66b45 3167 if (queue_interval >= 0)
9af3c549 3168 exim_fail("exim: -q specified more than once\n");
059ec3d9
PH
3169
3170 /* -qq...: Do queue runs in a 2-stage manner */
3171
3172 if (*argrest == 'q')
3173 {
8768d548 3174 f.queue_2stage = TRUE;
059ec3d9
PH
3175 argrest++;
3176 }
3177
3178 /* -qi...: Do only first (initial) deliveries */
3179
3180 if (*argrest == 'i')
3181 {
8768d548 3182 f.queue_run_first_delivery = TRUE;
059ec3d9
PH
3183 argrest++;
3184 }
3185
3186 /* -qf...: Run the queue, forcing deliveries
3187 -qff..: Ditto, forcing thawing as well */
3188
3189 if (*argrest == 'f')
3190 {
8768d548 3191 f.queue_run_force = TRUE;
55e70e76 3192 if (*++argrest == 'f')
059ec3d9 3193 {
8768d548 3194 f.deliver_force_thaw = TRUE;
059ec3d9
PH
3195 argrest++;
3196 }
3197 }
3198
3199 /* -q[f][f]l...: Run the queue only on local deliveries */
3200
3201 if (*argrest == 'l')
3202 {
8768d548 3203 f.queue_run_local = TRUE;
059ec3d9
PH
3204 argrest++;
3205 }
3206
55e70e76 3207 /* -q[f][f][l][G<name>]... Work on the named queue */
28b3821f
JH
3208
3209 if (*argrest == 'G')
3210 {
fa665e0b
JH
3211 int i;
3212 for (argrest++, i = 0; argrest[i] && argrest[i] != '/'; ) i++;
3213 queue_name = string_copyn(argrest, i);
3214 argrest += i;
3215 if (*argrest == '/') argrest++;
28b3821f
JH
3216 }
3217
3218 /* -q[f][f][l][G<name>]: Run the queue, optionally forced, optionally local
3219 only, optionally named, optionally starting from a given message id. */
059ec3d9 3220
e5903596
JH
3221 if (!(list_queue || count_queue))
3222 if (*argrest == 0
3223 && (i + 1 >= argc || argv[i+1][0] == '-' || mac_ismsgid(argv[i+1])))
3224 {
3225 queue_interval = 0;
3226 if (i+1 < argc && mac_ismsgid(argv[i+1]))
3227 start_queue_run_id = argv[++i];
3228 if (i+1 < argc && mac_ismsgid(argv[i+1]))
3229 stop_queue_run_id = argv[++i];
3230 }
059ec3d9 3231
fa665e0b
JH
3232 /* -q[f][f][l][G<name>/]<n>: Run the queue at regular intervals, optionally
3233 forced, optionally local only, optionally named. */
059ec3d9 3234
e5903596
JH
3235 else if ((queue_interval = readconf_readtime(*argrest ? argrest : argv[++i],
3236 0, FALSE)) <= 0)
3237 exim_fail("exim: bad time value %s: abandoned\n", argv[i]);
059ec3d9
PH
3238 break;
3239
3240
3241 case 'R': /* Synonymous with -qR... */
3242 receiving_message = FALSE;
3243
3244 /* -Rf: As -R (below) but force all deliveries,
3245 -Rff: Ditto, but also thaw all frozen messages,
3246 -Rr: String is regex
3247 -Rrf: Regex and force
3248 -Rrff: Regex and force and thaw
3249
3250 in all cases provided there are no further characters in this
3251 argument. */
3252
3253 if (*argrest != 0)
d7978c0f 3254 for (int i = 0; i < nelem(rsopts); i++)
059ec3d9
PH
3255 if (Ustrcmp(argrest, rsopts[i]) == 0)
3256 {
8768d548
JH
3257 if (i != 2) f.queue_run_force = TRUE;
3258 if (i >= 2) f.deliver_selectstring_regex = TRUE;
3259 if (i == 1 || i == 4) f.deliver_force_thaw = TRUE;
059ec3d9
PH
3260 argrest += Ustrlen(rsopts[i]);
3261 }
059ec3d9
PH
3262
3263 /* -R: Set string to match in addresses for forced queue run to
3264 pick out particular messages. */
3265
55e70e76
JH
3266 if (*argrest)
3267 deliver_selectstring = argrest;
3268 else if (i+1 < argc)
3269 deliver_selectstring = argv[++i];
3270 else
9af3c549 3271 exim_fail("exim: string expected after -R\n");
059ec3d9
PH
3272 break;
3273
3274
3275 /* -r: an obsolete synonym for -f (see above) */
3276
3277
3278 /* -S: Like -R but works on sender. */
3279
3280 case 'S': /* Synonymous with -qS... */
3281 receiving_message = FALSE;
3282
3283 /* -Sf: As -S (below) but force all deliveries,
3284 -Sff: Ditto, but also thaw all frozen messages,
3285 -Sr: String is regex
3286 -Srf: Regex and force
3287 -Srff: Regex and force and thaw
3288
3289 in all cases provided there are no further characters in this
3290 argument. */
3291
55e70e76 3292 if (*argrest)
d7978c0f 3293 for (int i = 0; i < nelem(rsopts); i++)
059ec3d9
PH
3294 if (Ustrcmp(argrest, rsopts[i]) == 0)
3295 {
8768d548
JH
3296 if (i != 2) f.queue_run_force = TRUE;
3297 if (i >= 2) f.deliver_selectstring_sender_regex = TRUE;
3298 if (i == 1 || i == 4) f.deliver_force_thaw = TRUE;
059ec3d9
PH
3299 argrest += Ustrlen(rsopts[i]);
3300 }
059ec3d9
PH
3301
3302 /* -S: Set string to match in addresses for forced queue run to
3303 pick out particular messages. */
3304
55e70e76
JH
3305 if (*argrest)
3306 deliver_selectstring_sender = argrest;
3307 else if (i+1 < argc)
3308 deliver_selectstring_sender = argv[++i];
3309 else
9af3c549 3310 exim_fail("exim: string expected after -S\n");
059ec3d9
PH
3311 break;
3312
3313 /* -Tqt is an option that is exclusively for use by the testing suite.
3314 It is not recognized in other circumstances. It allows for the setting up
3315 of explicit "queue times" so that various warning/retry things can be
3316 tested. Otherwise variability of clock ticks etc. cause problems. */
3317
3318 case 'T':
8768d548 3319 if (f.running_in_test_harness && Ustrcmp(argrest, "qt") == 0)
059ec3d9
PH
3320 fudged_queue_times = argv[++i];
3321 else badarg = TRUE;
3322 break;
3323
3324
3325 /* -t: Set flag to extract recipients from body of message. */
3326
3327 case 't':
3328 if (*argrest == 0) extract_recipients = TRUE;
3329
3330 /* -ti: Set flag to extract recipients from body of message, and also
3331 specify that dot does not end the message. */
3332
3333 else if (Ustrcmp(argrest, "i") == 0)
3334 {
3335 extract_recipients = TRUE;
8768d548 3336 f.dot_ends = FALSE;
059ec3d9
PH
3337 }
3338
3339 /* -tls-on-connect: don't wait for STARTTLS (for old clients) */
3340
01603eec 3341 #ifndef DISABLE_TLS
817d9f57 3342 else if (Ustrcmp(argrest, "ls-on-connect") == 0) tls_in.on_connect = TRUE;
059ec3d9
PH
3343 #endif
3344
3345 else badarg = TRUE;
3346 break;
3347
3348
3349 /* -U: This means "initial user submission" in sendmail, apparently. The
3350 doc claims that in future sendmail may refuse syntactically invalid
3351 messages instead of fixing them. For the moment, we just ignore it. */
3352
3353 case 'U':
3354 break;
3355
3356
3357 /* -v: verify things - this is a very low-level debugging */
3358
3359 case 'v':
3360 if (*argrest == 0)
3361 {
3362 debug_selector |= D_v;
3363 debug_file = stderr;
3364 }
3365 else badarg = TRUE;
3366 break;
3367
3368
3369 /* -x: AIX uses this to indicate some fancy 8-bit character stuff:
3370
3371 The -x flag tells the sendmail command that mail from a local
3372 mail program has National Language Support (NLS) extended characters
3373 in the body of the mail item. The sendmail command can send mail with
3374 extended NLS characters across networks that normally corrupts these
3375 8-bit characters.
3376
3377 As Exim is 8-bit clean, it just ignores this flag. */
3378
3379 case 'x':
3380 if (*argrest != 0) badarg = TRUE;
3381 break;
3382
a3fb9793
PP
3383 /* -X: in sendmail: takes one parameter, logfile, and sends debugging
3384 logs to that file. We swallow the parameter and otherwise ignore it. */
3385
3386 case 'X':
3387 if (*argrest == '\0')
a3fb9793 3388 if (++i >= argc)
9af3c549 3389 exim_fail("exim: string expected after -X\n");
0ad2e0fc
JH
3390 break;
3391
3392 case 'z':
3393 if (*argrest == '\0')
9af3c549
JH
3394 if (++i < argc)
3395 log_oneline = argv[i];
3396 else
3397 exim_fail("exim: file name expected after %s\n", argv[i-1]);
a3fb9793
PP
3398 break;
3399
059ec3d9
PH
3400 /* All other initial characters are errors */
3401
3402 default:
3403 badarg = TRUE;
3404 break;
3405 } /* End of high-level switch statement */
3406
3407 /* Failed to recognize the option, or syntax error */
3408
3409 if (badarg)
9af3c549 3410 exim_fail("exim abandoned: unknown, malformed, or incomplete "
059ec3d9 3411 "option %s\n", arg);
059ec3d9
PH
3412 }
3413
3414
3cc66b45
PH
3415/* If -R or -S have been specified without -q, assume a single queue run. */
3416
55e70e76
JH
3417if ( (deliver_selectstring || deliver_selectstring_sender)
3418 && queue_interval < 0)
3419 queue_interval = 0;
3cc66b45
PH
3420
3421
059ec3d9 3422END_ARG:
81ea09ca
NM
3423/* If usage_wanted is set we call the usage function - which never returns */
3424if (usage_wanted) exim_usage(called_as);
3425
3426/* Arguments have been processed. Check for incompatibilities. */
059ec3d9
PH
3427if ((
3428 (smtp_input || extract_recipients || recipients_arg < argc) &&
8768d548 3429 (f.daemon_listen || queue_interval >= 0 || bi_option ||
059ec3d9 3430 test_retry_arg >= 0 || test_rewrite_arg >= 0 ||
f05da2e8 3431 filter_test != FTEST_NONE || (msg_action_arg > 0 && !one_msg_action))
059ec3d9
PH
3432 ) ||
3433 (
3434 msg_action_arg > 0 &&
8768d548 3435 (f.daemon_listen || queue_interval > 0 || list_options ||
0ef732d9
PH
3436 (checking && msg_action != MSG_LOAD) ||
3437 bi_option || test_retry_arg >= 0 || test_rewrite_arg >= 0)
059ec3d9
PH
3438 ) ||
3439 (
8768d548 3440 (f.daemon_listen || queue_interval > 0) &&
059ec3d9 3441 (sender_address != NULL || list_options || list_queue || checking ||
0ef732d9 3442 bi_option)
059ec3d9
PH
3443 ) ||
3444 (
8768d548 3445 f.daemon_listen && queue_interval == 0
059ec3d9
PH
3446 ) ||
3447 (
8768d548 3448 f.inetd_wait_mode && queue_interval >= 0
9ee44efb
PP
3449 ) ||
3450 (
059ec3d9
PH
3451 list_options &&
3452 (checking || smtp_input || extract_recipients ||
f05da2e8 3453 filter_test != FTEST_NONE || bi_option)
059ec3d9
PH
3454 ) ||
3455 (
3456 verify_address_mode &&
8768d548 3457 (f.address_test_mode || smtp_input || extract_recipients ||
f05da2e8 3458 filter_test != FTEST_NONE || bi_option)
059ec3d9
PH
3459 ) ||
3460 (
8768d548 3461 f.address_test_mode && (smtp_input || extract_recipients ||
f05da2e8 3462 filter_test != FTEST_NONE || bi_option)
059ec3d9
PH
3463 ) ||
3464 (
f05da2e8 3465 smtp_input && (sender_address != NULL || filter_test != FTEST_NONE ||
059ec3d9
PH
3466 extract_recipients)
3467 ) ||
3468 (
3469 deliver_selectstring != NULL && queue_interval < 0
328895cc
PH
3470 ) ||
3471 (
3472 msg_action == MSG_LOAD &&
3473 (!expansion_test || expansion_test_message != NULL)
059ec3d9
PH
3474 )
3475 )
9af3c549 3476 exim_fail("exim: incompatible command-line options or arguments\n");
059ec3d9
PH
3477
3478/* If debugging is set up, set the file and the file descriptor to pass on to
3479child processes. It should, of course, be 2 for stderr. Also, force the daemon
3480to run in the foreground. */
3481
3482if (debug_selector != 0)
3483 {
3484 debug_file = stderr;
3485 debug_fd = fileno(debug_file);
8768d548 3486 f.background_daemon = FALSE;
9f01e50d 3487 testharness_pause_ms(100); /* lets caller finish */
059ec3d9
PH
3488 if (debug_selector != D_v) /* -v only doesn't show this */
3489 {
3490 debug_printf("Exim version %s uid=%ld gid=%ld pid=%d D=%x\n",
3491 version_string, (long int)real_uid, (long int)real_gid, (int)getpid(),
3492 debug_selector);
6545de78
PP
3493 if (!version_printed)
3494 show_whats_supported(stderr);
059ec3d9
PH
3495 }
3496 }
3497
3498/* When started with root privilege, ensure that the limits on the number of
3499open files and the number of processes (where that is accessible) are
3500sufficiently large, or are unset, in case Exim has been called from an
3501environment where the limits are screwed down. Not all OS have the ability to
3502change some of these limits. */
3503
3504if (unprivileged)
3505 {
3506 DEBUG(D_any) debug_print_ids(US"Exim has no root privilege:");
3507 }
3508else
3509 {
3510 struct rlimit rlp;
3511
3512 #ifdef RLIMIT_NOFILE
3513 if (getrlimit(RLIMIT_NOFILE, &rlp) < 0)
3514 {
3515 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NOFILE) failed: %s",
3516 strerror(errno));
3517 rlp.rlim_cur = rlp.rlim_max = 0;
3518 }
eb2c0248
PH
3519
3520 /* I originally chose 1000 as a nice big number that was unlikely to
a494b1e1
PH
3521 be exceeded. It turns out that some older OS have a fixed upper limit of
3522 256. */
eb2c0248 3523
059ec3d9
PH
3524 if (rlp.rlim_cur < 1000)
3525 {
3526 rlp.rlim_cur = rlp.rlim_max = 1000;
3527 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
eb2c0248 3528 {
a494b1e1
PH
3529 rlp.rlim_cur = rlp.rlim_max = 256;
3530 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
3531 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NOFILE) failed: %s",
3532 strerror(errno));
eb2c0248 3533 }
059ec3d9
PH
3534 }
3535 #endif
3536
3537 #ifdef RLIMIT_NPROC
3538 if (getrlimit(RLIMIT_NPROC, &rlp) < 0)
3539 {
3540 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NPROC) failed: %s",
3541 strerror(errno));
3542 rlp.rlim_cur = rlp.rlim_max = 0;
3543 }
3544
3545 #ifdef RLIM_INFINITY
3546 if (rlp.rlim_cur != RLIM_INFINITY && rlp.rlim_cur < 1000)
3547 {
3548 rlp.rlim_cur = rlp.rlim_max = RLIM_INFINITY;
3549 #else
3550 if (rlp.rlim_cur < 1000)
3551 {
3552 rlp.rlim_cur = rlp.rlim_max = 1000;
3553 #endif
3554 if (setrlimit(RLIMIT_NPROC, &rlp) < 0)
3555 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NPROC) failed: %s",
3556 strerror(errno));
3557 }
3558 #endif
3559 }
3560
3561/* Exim is normally entered as root (but some special configurations are
3562possible that don't do this). However, it always spins off sub-processes that
3563set their uid and gid as required for local delivery. We don't want to pass on
3564any extra groups that root may belong to, so we want to get rid of them all at
3565this point.
3566
3567We need to obey setgroups() at this stage, before possibly giving up root
3568privilege for a changed configuration file, but later on we might need to
3569check on the additional groups for the admin user privilege - can't do that
3570till after reading the config, which might specify the exim gid. Therefore,
3571save the group list here first. */
3572
157d73b5 3573if ((group_count = getgroups(nelem(group_list), group_list)) < 0)
9af3c549 3574 exim_fail("exim: getgroups() failed: %s\n", strerror(errno));
059ec3d9
PH
3575
3576/* There is a fundamental difference in some BSD systems in the matter of
3577groups. FreeBSD and BSDI are known to be different; NetBSD and OpenBSD are
3578known not to be different. On the "different" systems there is a single group
3579list, and the first entry in it is the current group. On all other versions of
3580Unix there is a supplementary group list, which is in *addition* to the current
3581group. Consequently, to get rid of all extraneous groups on a "standard" system
3582you pass over 0 groups to setgroups(), while on a "different" system you pass
3583over a single group - the current group, which is always the first group in the
3584list. Calling setgroups() with zero groups on a "different" system results in
3585an error return. The following code should cope with both types of system.
3586
3b7ac02c
JH
3587 Unfortunately, recent MacOS, which should be a FreeBSD, "helpfully" succeeds
3588 the "setgroups() with zero groups" - and changes the egid.
3589 Thanks to that we had to stash the original_egid above, for use below
3590 in the call to exim_setugid().
3591
059ec3d9
PH
3592However, if this process isn't running as root, setgroups() can't be used
3593since you have to be root to run it, even if throwing away groups. Not being
3594root here happens only in some unusual configurations. We just ignore the
3595error. */
3596
9af3c549
JH
3597if (setgroups(0, NULL) != 0 && setgroups(1, group_list) != 0 && !unprivileged)
3598 exim_fail("exim: setgroups() failed: %s\n", strerror(errno));
059ec3d9
PH
3599
3600/* If the configuration file name has been altered by an argument on the
3601command line (either a new file name or a macro definition) and the caller is
cd25e41d
DW
3602not root, or if this is a filter testing run, remove any setuid privilege the
3603program has and run as the underlying user.
059ec3d9 3604
cd25e41d
DW
3605The exim user is locked out of this, which severely restricts the use of -C
3606for some purposes.
059ec3d9
PH
3607
3608Otherwise, set the real ids to the effective values (should be root unless run
3609from inetd, which it can either be root or the exim uid, if one is configured).
3610
3611There is a private mechanism for bypassing some of this, in order to make it
3612possible to test lots of configurations automatically, without having either to
3613recompile each time, or to patch in an actual configuration file name and other
3614values (such as the path name). If running in the test harness, pretend that
3615configuration file changes and macro definitions haven't happened. */
3616
3617