Commit | Line | Data |
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73a46702 | 1 | /* $Cambridge: exim/src/src/exim.c,v 1.71 2010/06/07 00:12:42 pdp Exp $ */ |
059ec3d9 PH |
2 | |
3 | /************************************************* | |
4 | * Exim - an Internet mail transport agent * | |
5 | *************************************************/ | |
6 | ||
0a49a7a4 | 7 | /* Copyright (c) University of Cambridge 1995 - 2009 */ |
059ec3d9 PH |
8 | /* See the file NOTICE for conditions of use and distribution. */ |
9 | ||
10 | ||
11 | /* The main function: entry point, initialization, and high-level control. | |
12 | Also a few functions that don't naturally fit elsewhere. */ | |
13 | ||
14 | ||
15 | #include "exim.h" | |
16 | ||
6545de78 PP |
17 | extern void init_lookup_list(void); |
18 | ||
059ec3d9 PH |
19 | |
20 | ||
21 | /************************************************* | |
22 | * Function interface to store functions * | |
23 | *************************************************/ | |
24 | ||
25 | /* We need some real functions to pass to the PCRE regular expression library | |
26 | for store allocation via Exim's store manager. The normal calls are actually | |
27 | macros that pass over location information to make tracing easier. These | |
28 | functions just interface to the standard macro calls. A good compiler will | |
29 | optimize out the tail recursion and so not make them too expensive. There | |
30 | are two sets of functions; one for use when we want to retain the compiled | |
31 | regular expression for a long time; the other for short-term use. */ | |
32 | ||
33 | static void * | |
34 | function_store_get(size_t size) | |
35 | { | |
36 | return store_get((int)size); | |
37 | } | |
38 | ||
39 | static void | |
40 | function_dummy_free(void *block) { block = block; } | |
41 | ||
42 | static void * | |
43 | function_store_malloc(size_t size) | |
44 | { | |
45 | return store_malloc((int)size); | |
46 | } | |
47 | ||
48 | static void | |
49 | function_store_free(void *block) | |
50 | { | |
51 | store_free(block); | |
52 | } | |
53 | ||
54 | ||
55 | ||
56 | ||
57 | /************************************************* | |
58 | * Compile regular expression and panic on fail * | |
59 | *************************************************/ | |
60 | ||
61 | /* This function is called when failure to compile a regular expression leads | |
62 | to a panic exit. In other cases, pcre_compile() is called directly. In many | |
63 | cases where this function is used, the results of the compilation are to be | |
64 | placed in long-lived store, so we temporarily reset the store management | |
65 | functions that PCRE uses if the use_malloc flag is set. | |
66 | ||
67 | Argument: | |
68 | pattern the pattern to compile | |
69 | caseless TRUE if caseless matching is required | |
70 | use_malloc TRUE if compile into malloc store | |
71 | ||
72 | Returns: pointer to the compiled pattern | |
73 | */ | |
74 | ||
75 | const pcre * | |
76 | regex_must_compile(uschar *pattern, BOOL caseless, BOOL use_malloc) | |
77 | { | |
78 | int offset; | |
79 | int options = PCRE_COPT; | |
80 | const pcre *yield; | |
81 | const uschar *error; | |
82 | if (use_malloc) | |
83 | { | |
84 | pcre_malloc = function_store_malloc; | |
85 | pcre_free = function_store_free; | |
86 | } | |
87 | if (caseless) options |= PCRE_CASELESS; | |
88 | yield = pcre_compile(CS pattern, options, (const char **)&error, &offset, NULL); | |
89 | pcre_malloc = function_store_get; | |
90 | pcre_free = function_dummy_free; | |
91 | if (yield == NULL) | |
92 | log_write(0, LOG_MAIN|LOG_PANIC_DIE, "regular expression error: " | |
93 | "%s at offset %d while compiling %s", error, offset, pattern); | |
94 | return yield; | |
95 | } | |
96 | ||
97 | ||
98 | ||
99 | ||
100 | /************************************************* | |
101 | * Execute regular expression and set strings * | |
102 | *************************************************/ | |
103 | ||
104 | /* This function runs a regular expression match, and sets up the pointers to | |
105 | the matched substrings. | |
106 | ||
107 | Arguments: | |
108 | re the compiled expression | |
109 | subject the subject string | |
110 | options additional PCRE options | |
111 | setup if < 0 do full setup | |
112 | if >= 0 setup from setup+1 onwards, | |
113 | excluding the full matched string | |
114 | ||
115 | Returns: TRUE or FALSE | |
116 | */ | |
117 | ||
118 | BOOL | |
119 | regex_match_and_setup(const pcre *re, uschar *subject, int options, int setup) | |
120 | { | |
121 | int ovector[3*(EXPAND_MAXN+1)]; | |
122 | int n = pcre_exec(re, NULL, CS subject, Ustrlen(subject), 0, | |
123 | PCRE_EOPT | options, ovector, sizeof(ovector)/sizeof(int)); | |
124 | BOOL yield = n >= 0; | |
125 | if (n == 0) n = EXPAND_MAXN + 1; | |
126 | if (yield) | |
127 | { | |
128 | int nn; | |
129 | expand_nmax = (setup < 0)? 0 : setup + 1; | |
130 | for (nn = (setup < 0)? 0 : 2; nn < n*2; nn += 2) | |
131 | { | |
132 | expand_nstring[expand_nmax] = subject + ovector[nn]; | |
133 | expand_nlength[expand_nmax++] = ovector[nn+1] - ovector[nn]; | |
134 | } | |
135 | expand_nmax--; | |
136 | } | |
137 | return yield; | |
138 | } | |
139 | ||
140 | ||
141 | ||
142 | ||
143 | /************************************************* | |
144 | * Handler for SIGUSR1 * | |
145 | *************************************************/ | |
146 | ||
147 | /* SIGUSR1 causes any exim process to write to the process log details of | |
148 | what it is currently doing. It will only be used if the OS is capable of | |
149 | setting up a handler that causes automatic restarting of any system call | |
150 | that is in progress at the time. | |
151 | ||
152 | Argument: the signal number (SIGUSR1) | |
153 | Returns: nothing | |
154 | */ | |
155 | ||
156 | static void | |
157 | usr1_handler(int sig) | |
158 | { | |
159 | sig = sig; /* Keep picky compilers happy */ | |
160 | log_write(0, LOG_PROCESS, "%s", process_info); | |
161 | log_close_all(); | |
162 | os_restarting_signal(SIGUSR1, usr1_handler); | |
163 | } | |
164 | ||
165 | ||
166 | ||
167 | /************************************************* | |
168 | * Timeout handler * | |
169 | *************************************************/ | |
170 | ||
171 | /* This handler is enabled most of the time that Exim is running. The handler | |
172 | doesn't actually get used unless alarm() has been called to set a timer, to | |
173 | place a time limit on a system call of some kind. When the handler is run, it | |
174 | re-enables itself. | |
175 | ||
176 | There are some other SIGALRM handlers that are used in special cases when more | |
177 | than just a flag setting is required; for example, when reading a message's | |
178 | input. These are normally set up in the code module that uses them, and the | |
179 | SIGALRM handler is reset to this one afterwards. | |
180 | ||
181 | Argument: the signal value (SIGALRM) | |
182 | Returns: nothing | |
183 | */ | |
184 | ||
185 | void | |
186 | sigalrm_handler(int sig) | |
187 | { | |
188 | sig = sig; /* Keep picky compilers happy */ | |
189 | sigalrm_seen = TRUE; | |
190 | os_non_restarting_signal(SIGALRM, sigalrm_handler); | |
191 | } | |
192 | ||
193 | ||
194 | ||
195 | /************************************************* | |
196 | * Sleep for a fractional time interval * | |
197 | *************************************************/ | |
198 | ||
199 | /* This function is called by millisleep() and exim_wait_tick() to wait for a | |
200 | period of time that may include a fraction of a second. The coding is somewhat | |
eb2c0248 PH |
201 | tedious. We do not expect setitimer() ever to fail, but if it does, the process |
202 | will wait for ever, so we panic in this instance. (There was a case of this | |
203 | when a bug in a function that calls milliwait() caused it to pass invalid data. | |
7086e875 | 204 | That's when I added the check. :-) |
059ec3d9 PH |
205 | |
206 | Argument: an itimerval structure containing the interval | |
207 | Returns: nothing | |
208 | */ | |
209 | ||
210 | static void | |
211 | milliwait(struct itimerval *itval) | |
212 | { | |
213 | sigset_t sigmask; | |
214 | sigset_t old_sigmask; | |
215 | (void)sigemptyset(&sigmask); /* Empty mask */ | |
216 | (void)sigaddset(&sigmask, SIGALRM); /* Add SIGALRM */ | |
217 | (void)sigprocmask(SIG_BLOCK, &sigmask, &old_sigmask); /* Block SIGALRM */ | |
7086e875 | 218 | if (setitimer(ITIMER_REAL, itval, NULL) < 0) /* Start timer */ |
eb2c0248 PH |
219 | log_write(0, LOG_MAIN|LOG_PANIC_DIE, |
220 | "setitimer() failed: %s", strerror(errno)); | |
059ec3d9 PH |
221 | (void)sigfillset(&sigmask); /* All signals */ |
222 | (void)sigdelset(&sigmask, SIGALRM); /* Remove SIGALRM */ | |
223 | (void)sigsuspend(&sigmask); /* Until SIGALRM */ | |
224 | (void)sigprocmask(SIG_SETMASK, &old_sigmask, NULL); /* Restore mask */ | |
225 | } | |
226 | ||
227 | ||
228 | ||
229 | ||
230 | /************************************************* | |
231 | * Millisecond sleep function * | |
232 | *************************************************/ | |
233 | ||
234 | /* The basic sleep() function has a granularity of 1 second, which is too rough | |
235 | in some cases - for example, when using an increasing delay to slow down | |
236 | spammers. | |
237 | ||
238 | Argument: number of millseconds | |
239 | Returns: nothing | |
240 | */ | |
241 | ||
242 | void | |
243 | millisleep(int msec) | |
244 | { | |
245 | struct itimerval itval; | |
246 | itval.it_interval.tv_sec = 0; | |
247 | itval.it_interval.tv_usec = 0; | |
248 | itval.it_value.tv_sec = msec/1000; | |
249 | itval.it_value.tv_usec = (msec % 1000) * 1000; | |
250 | milliwait(&itval); | |
251 | } | |
252 | ||
253 | ||
254 | ||
255 | /************************************************* | |
256 | * Compare microsecond times * | |
257 | *************************************************/ | |
258 | ||
259 | /* | |
260 | Arguments: | |
261 | tv1 the first time | |
262 | tv2 the second time | |
263 | ||
264 | Returns: -1, 0, or +1 | |
265 | */ | |
266 | ||
267 | int | |
268 | exim_tvcmp(struct timeval *t1, struct timeval *t2) | |
269 | { | |
270 | if (t1->tv_sec > t2->tv_sec) return +1; | |
271 | if (t1->tv_sec < t2->tv_sec) return -1; | |
272 | if (t1->tv_usec > t2->tv_usec) return +1; | |
273 | if (t1->tv_usec < t2->tv_usec) return -1; | |
274 | return 0; | |
275 | } | |
276 | ||
277 | ||
278 | ||
279 | ||
280 | /************************************************* | |
281 | * Clock tick wait function * | |
282 | *************************************************/ | |
283 | ||
284 | /* Exim uses a time + a pid to generate a unique identifier in two places: its | |
285 | message IDs, and in file names for maildir deliveries. Because some OS now | |
286 | re-use pids within the same second, sub-second times are now being used. | |
287 | However, for absolute certaintly, we must ensure the clock has ticked before | |
288 | allowing the relevant process to complete. At the time of implementation of | |
289 | this code (February 2003), the speed of processors is such that the clock will | |
290 | invariably have ticked already by the time a process has done its job. This | |
291 | function prepares for the time when things are faster - and it also copes with | |
292 | clocks that go backwards. | |
293 | ||
294 | Arguments: | |
295 | then_tv A timeval which was used to create uniqueness; its usec field | |
296 | has been rounded down to the value of the resolution. | |
297 | We want to be sure the current time is greater than this. | |
298 | resolution The resolution that was used to divide the microseconds | |
299 | (1 for maildir, larger for message ids) | |
300 | ||
301 | Returns: nothing | |
302 | */ | |
303 | ||
304 | void | |
305 | exim_wait_tick(struct timeval *then_tv, int resolution) | |
306 | { | |
307 | struct timeval now_tv; | |
308 | long int now_true_usec; | |
309 | ||
310 | (void)gettimeofday(&now_tv, NULL); | |
311 | now_true_usec = now_tv.tv_usec; | |
312 | now_tv.tv_usec = (now_true_usec/resolution) * resolution; | |
313 | ||
314 | if (exim_tvcmp(&now_tv, then_tv) <= 0) | |
315 | { | |
316 | struct itimerval itval; | |
317 | itval.it_interval.tv_sec = 0; | |
318 | itval.it_interval.tv_usec = 0; | |
319 | itval.it_value.tv_sec = then_tv->tv_sec - now_tv.tv_sec; | |
320 | itval.it_value.tv_usec = then_tv->tv_usec + resolution - now_true_usec; | |
321 | ||
322 | /* We know that, overall, "now" is less than or equal to "then". Therefore, a | |
323 | negative value for the microseconds is possible only in the case when "now" | |
324 | is more than a second less than "then". That means that itval.it_value.tv_sec | |
325 | is greater than zero. The following correction is therefore safe. */ | |
326 | ||
327 | if (itval.it_value.tv_usec < 0) | |
328 | { | |
329 | itval.it_value.tv_usec += 1000000; | |
330 | itval.it_value.tv_sec -= 1; | |
331 | } | |
332 | ||
333 | DEBUG(D_transport|D_receive) | |
334 | { | |
335 | if (!running_in_test_harness) | |
336 | { | |
337 | debug_printf("tick check: %lu.%06lu %lu.%06lu\n", | |
338 | then_tv->tv_sec, then_tv->tv_usec, now_tv.tv_sec, now_tv.tv_usec); | |
339 | debug_printf("waiting %lu.%06lu\n", itval.it_value.tv_sec, | |
340 | itval.it_value.tv_usec); | |
341 | } | |
342 | } | |
343 | ||
344 | milliwait(&itval); | |
345 | } | |
346 | } | |
347 | ||
348 | ||
349 | ||
350 | ||
351 | /************************************************* | |
352 | * Set up processing details * | |
353 | *************************************************/ | |
354 | ||
355 | /* Save a text string for dumping when SIGUSR1 is received. | |
356 | Do checks for overruns. | |
357 | ||
358 | Arguments: format and arguments, as for printf() | |
359 | Returns: nothing | |
360 | */ | |
361 | ||
362 | void | |
1ba28e2b | 363 | set_process_info(const char *format, ...) |
059ec3d9 PH |
364 | { |
365 | int len; | |
366 | va_list ap; | |
367 | sprintf(CS process_info, "%5d ", (int)getpid()); | |
368 | len = Ustrlen(process_info); | |
369 | va_start(ap, format); | |
370 | if (!string_vformat(process_info + len, PROCESS_INFO_SIZE - len, format, ap)) | |
371 | Ustrcpy(process_info + len, "**** string overflowed buffer ****"); | |
372 | DEBUG(D_process_info) debug_printf("set_process_info: %s\n", process_info); | |
373 | va_end(ap); | |
374 | } | |
375 | ||
376 | ||
377 | ||
378 | ||
379 | ||
2632889e PH |
380 | /************************************************* |
381 | * Call fopen() with umask 777 and adjust mode * | |
382 | *************************************************/ | |
383 | ||
384 | /* Exim runs with umask(0) so that files created with open() have the mode that | |
385 | is specified in the open() call. However, there are some files, typically in | |
386 | the spool directory, that are created with fopen(). They end up world-writeable | |
387 | if no precautions are taken. Although the spool directory is not accessible to | |
388 | the world, this is an untidiness. So this is a wrapper function for fopen() | |
389 | that sorts out the mode of the created file. | |
390 | ||
391 | Arguments: | |
392 | filename the file name | |
393 | options the fopen() options | |
394 | mode the required mode | |
395 | ||
396 | Returns: the fopened FILE or NULL | |
397 | */ | |
398 | ||
399 | FILE * | |
1ba28e2b | 400 | modefopen(const uschar *filename, const char *options, mode_t mode) |
2632889e | 401 | { |
67d175de PH |
402 | mode_t saved_umask = umask(0777); |
403 | FILE *f = Ufopen(filename, options); | |
404 | (void)umask(saved_umask); | |
2632889e PH |
405 | if (f != NULL) (void)fchmod(fileno(f), mode); |
406 | return f; | |
407 | } | |
408 | ||
409 | ||
410 | ||
411 | ||
059ec3d9 PH |
412 | /************************************************* |
413 | * Ensure stdin, stdout, and stderr exist * | |
414 | *************************************************/ | |
415 | ||
416 | /* Some operating systems grumble if an exec() happens without a standard | |
417 | input, output, and error (fds 0, 1, 2) being defined. The worry is that some | |
418 | file will be opened and will use these fd values, and then some other bit of | |
419 | code will assume, for example, that it can write error messages to stderr. | |
420 | This function ensures that fds 0, 1, and 2 are open if they do not already | |
421 | exist, by connecting them to /dev/null. | |
422 | ||
423 | This function is also used to ensure that std{in,out,err} exist at all times, | |
424 | so that if any library that Exim calls tries to use them, it doesn't crash. | |
425 | ||
426 | Arguments: None | |
427 | Returns: Nothing | |
428 | */ | |
429 | ||
430 | void | |
431 | exim_nullstd(void) | |
432 | { | |
433 | int i; | |
434 | int devnull = -1; | |
435 | struct stat statbuf; | |
436 | for (i = 0; i <= 2; i++) | |
437 | { | |
438 | if (fstat(i, &statbuf) < 0 && errno == EBADF) | |
439 | { | |
440 | if (devnull < 0) devnull = open("/dev/null", O_RDWR); | |
441 | if (devnull < 0) log_write(0, LOG_MAIN|LOG_PANIC_DIE, "%s", | |
442 | string_open_failed(errno, "/dev/null")); | |
1fe64dcc | 443 | if (devnull != i) (void)dup2(devnull, i); |
059ec3d9 PH |
444 | } |
445 | } | |
1fe64dcc | 446 | if (devnull > 2) (void)close(devnull); |
059ec3d9 PH |
447 | } |
448 | ||
449 | ||
450 | ||
451 | ||
452 | /************************************************* | |
453 | * Close unwanted file descriptors for delivery * | |
454 | *************************************************/ | |
455 | ||
456 | /* This function is called from a new process that has been forked to deliver | |
457 | an incoming message, either directly, or using exec. | |
458 | ||
459 | We want any smtp input streams to be closed in this new process. However, it | |
460 | has been observed that using fclose() here causes trouble. When reading in -bS | |
461 | input, duplicate copies of messages have been seen. The files will be sharing a | |
462 | file pointer with the parent process, and it seems that fclose() (at least on | |
463 | some systems - I saw this on Solaris 2.5.1) messes with that file pointer, at | |
464 | least sometimes. Hence we go for closing the underlying file descriptors. | |
465 | ||
466 | If TLS is active, we want to shut down the TLS library, but without molesting | |
467 | the parent's SSL connection. | |
468 | ||
469 | For delivery of a non-SMTP message, we want to close stdin and stdout (and | |
470 | stderr unless debugging) because the calling process might have set them up as | |
471 | pipes and be waiting for them to close before it waits for the submission | |
472 | process to terminate. If they aren't closed, they hold up the calling process | |
473 | until the initial delivery process finishes, which is not what we want. | |
474 | ||
475 | Exception: We do want it for synchronous delivery! | |
476 | ||
477 | And notwithstanding all the above, if D_resolver is set, implying resolver | |
478 | debugging, leave stdout open, because that's where the resolver writes its | |
479 | debugging output. | |
480 | ||
481 | When we close stderr (which implies we've also closed stdout), we also get rid | |
482 | of any controlling terminal. | |
483 | ||
484 | Arguments: None | |
485 | Returns: Nothing | |
486 | */ | |
487 | ||
488 | static void | |
489 | close_unwanted(void) | |
490 | { | |
491 | if (smtp_input) | |
492 | { | |
493 | #ifdef SUPPORT_TLS | |
494 | tls_close(FALSE); /* Shut down the TLS library */ | |
495 | #endif | |
1fe64dcc PH |
496 | (void)close(fileno(smtp_in)); |
497 | (void)close(fileno(smtp_out)); | |
059ec3d9 PH |
498 | smtp_in = NULL; |
499 | } | |
500 | else | |
501 | { | |
1fe64dcc PH |
502 | (void)close(0); /* stdin */ |
503 | if ((debug_selector & D_resolver) == 0) (void)close(1); /* stdout */ | |
504 | if (debug_selector == 0) /* stderr */ | |
059ec3d9 PH |
505 | { |
506 | if (!synchronous_delivery) | |
507 | { | |
1fe64dcc | 508 | (void)close(2); |
059ec3d9 PH |
509 | log_stderr = NULL; |
510 | } | |
511 | (void)setsid(); | |
512 | } | |
513 | } | |
514 | } | |
515 | ||
516 | ||
517 | ||
518 | ||
519 | /************************************************* | |
520 | * Set uid and gid * | |
521 | *************************************************/ | |
522 | ||
523 | /* This function sets a new uid and gid permanently, optionally calling | |
524 | initgroups() to set auxiliary groups. There are some special cases when running | |
525 | Exim in unprivileged modes. In these situations the effective uid will not be | |
526 | root; if we already have the right effective uid/gid, and don't need to | |
527 | initialize any groups, leave things as they are. | |
528 | ||
529 | Arguments: | |
530 | uid the uid | |
531 | gid the gid | |
532 | igflag TRUE if initgroups() wanted | |
533 | msg text to use in debugging output and failure log | |
534 | ||
535 | Returns: nothing; bombs out on failure | |
536 | */ | |
537 | ||
538 | void | |
539 | exim_setugid(uid_t uid, gid_t gid, BOOL igflag, uschar *msg) | |
540 | { | |
541 | uid_t euid = geteuid(); | |
542 | gid_t egid = getegid(); | |
543 | ||
544 | if (euid == root_uid || euid != uid || egid != gid || igflag) | |
545 | { | |
546 | /* At least one OS returns +1 for initgroups failure, so just check for | |
547 | non-zero. */ | |
548 | ||
549 | if (igflag) | |
550 | { | |
551 | struct passwd *pw = getpwuid(uid); | |
552 | if (pw != NULL) | |
553 | { | |
554 | if (initgroups(pw->pw_name, gid) != 0) | |
555 | log_write(0,LOG_MAIN|LOG_PANIC_DIE,"initgroups failed for uid=%ld: %s", | |
556 | (long int)uid, strerror(errno)); | |
557 | } | |
558 | else log_write(0, LOG_MAIN|LOG_PANIC_DIE, "cannot run initgroups(): " | |
559 | "no passwd entry for uid=%ld", (long int)uid); | |
560 | } | |
561 | ||
562 | if (setgid(gid) < 0 || setuid(uid) < 0) | |
563 | { | |
564 | log_write(0, LOG_MAIN|LOG_PANIC_DIE, "unable to set gid=%ld or uid=%ld " | |
565 | "(euid=%ld): %s", (long int)gid, (long int)uid, (long int)euid, msg); | |
566 | } | |
567 | } | |
568 | ||
569 | /* Debugging output included uid/gid and all groups */ | |
570 | ||
571 | DEBUG(D_uid) | |
572 | { | |
cd59ab18 | 573 | int group_count, save_errno; |
059ec3d9 PH |
574 | gid_t group_list[NGROUPS_MAX]; |
575 | debug_printf("changed uid/gid: %s\n uid=%ld gid=%ld pid=%ld\n", msg, | |
576 | (long int)geteuid(), (long int)getegid(), (long int)getpid()); | |
577 | group_count = getgroups(NGROUPS_MAX, group_list); | |
cd59ab18 | 578 | save_errno = errno; |
059ec3d9 PH |
579 | debug_printf(" auxiliary group list:"); |
580 | if (group_count > 0) | |
581 | { | |
582 | int i; | |
583 | for (i = 0; i < group_count; i++) debug_printf(" %d", (int)group_list[i]); | |
584 | } | |
cd59ab18 PP |
585 | else if (group_count < 0) |
586 | debug_printf(" <error: %s>", strerror(save_errno)); | |
059ec3d9 PH |
587 | else debug_printf(" <none>"); |
588 | debug_printf("\n"); | |
589 | } | |
590 | } | |
591 | ||
592 | ||
593 | ||
594 | ||
595 | /************************************************* | |
596 | * Exit point * | |
597 | *************************************************/ | |
598 | ||
599 | /* Exim exits via this function so that it always clears up any open | |
600 | databases. | |
601 | ||
602 | Arguments: | |
603 | rc return code | |
604 | ||
605 | Returns: does not return | |
606 | */ | |
607 | ||
608 | void | |
609 | exim_exit(int rc) | |
610 | { | |
611 | search_tidyup(); | |
612 | DEBUG(D_any) | |
613 | debug_printf(">>>>>>>>>>>>>>>> Exim pid=%d terminating with rc=%d " | |
614 | ">>>>>>>>>>>>>>>>\n", (int)getpid(), rc); | |
615 | exit(rc); | |
616 | } | |
617 | ||
618 | ||
619 | ||
620 | ||
621 | /************************************************* | |
622 | * Extract port from host address * | |
623 | *************************************************/ | |
624 | ||
625 | /* Called to extract the port from the values given to -oMa and -oMi. | |
b90c388a PH |
626 | It also checks the syntax of the address, and terminates it before the |
627 | port data when a port is extracted. | |
059ec3d9 PH |
628 | |
629 | Argument: | |
630 | address the address, with possible port on the end | |
631 | ||
632 | Returns: the port, or zero if there isn't one | |
633 | bombs out on a syntax error | |
634 | */ | |
635 | ||
636 | static int | |
637 | check_port(uschar *address) | |
638 | { | |
7cd1141b | 639 | int port = host_address_extract_port(address); |
8e669ac1 | 640 | if (string_is_ip_address(address, NULL) == 0) |
059ec3d9 PH |
641 | { |
642 | fprintf(stderr, "exim abandoned: \"%s\" is not an IP address\n", address); | |
643 | exit(EXIT_FAILURE); | |
644 | } | |
645 | return port; | |
646 | } | |
647 | ||
648 | ||
649 | ||
650 | /************************************************* | |
651 | * Test/verify an address * | |
652 | *************************************************/ | |
653 | ||
654 | /* This function is called by the -bv and -bt code. It extracts a working | |
655 | address from a full RFC 822 address. This isn't really necessary per se, but it | |
656 | has the effect of collapsing source routes. | |
657 | ||
658 | Arguments: | |
659 | s the address string | |
660 | flags flag bits for verify_address() | |
661 | exit_value to be set for failures | |
662 | ||
a5a28604 | 663 | Returns: nothing |
059ec3d9 PH |
664 | */ |
665 | ||
666 | static void | |
667 | test_address(uschar *s, int flags, int *exit_value) | |
668 | { | |
669 | int start, end, domain; | |
670 | uschar *parse_error = NULL; | |
671 | uschar *address = parse_extract_address(s, &parse_error, &start, &end, &domain, | |
672 | FALSE); | |
673 | if (address == NULL) | |
674 | { | |
675 | fprintf(stdout, "syntax error: %s\n", parse_error); | |
676 | *exit_value = 2; | |
677 | } | |
678 | else | |
679 | { | |
680 | int rc = verify_address(deliver_make_addr(address,TRUE), stdout, flags, -1, | |
4deaf07d | 681 | -1, -1, NULL, NULL, NULL); |
059ec3d9 PH |
682 | if (rc == FAIL) *exit_value = 2; |
683 | else if (rc == DEFER && *exit_value == 0) *exit_value = 1; | |
684 | } | |
685 | } | |
686 | ||
687 | ||
688 | ||
059ec3d9 PH |
689 | /************************************************* |
690 | * Show supported features * | |
691 | *************************************************/ | |
692 | ||
4b2241d2 PP |
693 | /* This function is called for -bV/--version and for -d to output the optional |
694 | features of the current Exim binary. | |
059ec3d9 PH |
695 | |
696 | Arguments: a FILE for printing | |
697 | Returns: nothing | |
698 | */ | |
699 | ||
700 | static void | |
701 | show_whats_supported(FILE *f) | |
702 | { | |
703 | #ifdef DB_VERSION_STRING | |
704 | fprintf(f, "Berkeley DB: %s\n", DB_VERSION_STRING); | |
705 | #elif defined(BTREEVERSION) && defined(HASHVERSION) | |
706 | #ifdef USE_DB | |
707 | fprintf(f, "Probably Berkeley DB version 1.8x (native mode)\n"); | |
708 | #else | |
709 | fprintf(f, "Probably Berkeley DB version 1.8x (compatibility mode)\n"); | |
710 | #endif | |
711 | #elif defined(_DBM_RDONLY) || defined(dbm_dirfno) | |
712 | fprintf(f, "Probably ndbm\n"); | |
713 | #elif defined(USE_TDB) | |
714 | fprintf(f, "Using tdb\n"); | |
715 | #else | |
716 | #ifdef USE_GDBM | |
717 | fprintf(f, "Probably GDBM (native mode)\n"); | |
718 | #else | |
719 | fprintf(f, "Probably GDBM (compatibility mode)\n"); | |
720 | #endif | |
721 | #endif | |
722 | ||
723 | fprintf(f, "Support for:"); | |
9cec981f PH |
724 | #ifdef SUPPORT_CRYPTEQ |
725 | fprintf(f, " crypteq"); | |
726 | #endif | |
059ec3d9 PH |
727 | #if HAVE_ICONV |
728 | fprintf(f, " iconv()"); | |
729 | #endif | |
730 | #if HAVE_IPV6 | |
731 | fprintf(f, " IPv6"); | |
732 | #endif | |
79378e0f PH |
733 | #ifdef HAVE_SETCLASSRESOURCES |
734 | fprintf(f, " use_setclassresources"); | |
929ba01c | 735 | #endif |
059ec3d9 PH |
736 | #ifdef SUPPORT_PAM |
737 | fprintf(f, " PAM"); | |
738 | #endif | |
739 | #ifdef EXIM_PERL | |
740 | fprintf(f, " Perl"); | |
741 | #endif | |
1a46a8c5 PH |
742 | #ifdef EXPAND_DLFUNC |
743 | fprintf(f, " Expand_dlfunc"); | |
744 | #endif | |
059ec3d9 PH |
745 | #ifdef USE_TCP_WRAPPERS |
746 | fprintf(f, " TCPwrappers"); | |
747 | #endif | |
748 | #ifdef SUPPORT_TLS | |
749 | #ifdef USE_GNUTLS | |
750 | fprintf(f, " GnuTLS"); | |
751 | #else | |
752 | fprintf(f, " OpenSSL"); | |
753 | #endif | |
754 | #endif | |
b2f5a032 PH |
755 | #ifdef SUPPORT_TRANSLATE_IP_ADDRESS |
756 | fprintf(f, " translate_ip_address"); | |
757 | #endif | |
f174f16e PH |
758 | #ifdef SUPPORT_MOVE_FROZEN_MESSAGES |
759 | fprintf(f, " move_frozen_messages"); | |
760 | #endif | |
8523533c TK |
761 | #ifdef WITH_CONTENT_SCAN |
762 | fprintf(f, " Content_Scanning"); | |
763 | #endif | |
80a47a2c TK |
764 | #ifndef DISABLE_DKIM |
765 | fprintf(f, " DKIM"); | |
766 | #endif | |
8523533c TK |
767 | #ifdef WITH_OLD_DEMIME |
768 | fprintf(f, " Old_Demime"); | |
769 | #endif | |
770 | #ifdef EXPERIMENTAL_SPF | |
771 | fprintf(f, " Experimental_SPF"); | |
772 | #endif | |
773 | #ifdef EXPERIMENTAL_SRS | |
774 | fprintf(f, " Experimental_SRS"); | |
775 | #endif | |
776 | #ifdef EXPERIMENTAL_BRIGHTMAIL | |
777 | fprintf(f, " Experimental_Brightmail"); | |
778 | #endif | |
6a8f9482 TK |
779 | #ifdef EXPERIMENTAL_DCC |
780 | fprintf(f, " Experimental_DCC"); | |
781 | #endif | |
059ec3d9 PH |
782 | fprintf(f, "\n"); |
783 | ||
e6d225ae DW |
784 | fprintf(f, "Lookups (built-in):"); |
785 | #if defined(LOOKUP_LSEARCH) && LOOKUP_LSEARCH!=2 | |
059ec3d9 PH |
786 | fprintf(f, " lsearch wildlsearch nwildlsearch iplsearch"); |
787 | #endif | |
e6d225ae | 788 | #if defined(LOOKUP_CDB) && LOOKUP_CDB!=2 |
059ec3d9 PH |
789 | fprintf(f, " cdb"); |
790 | #endif | |
e6d225ae | 791 | #if defined(LOOKUP_DBM) && LOOKUP_DBM!=2 |
059ec3d9 PH |
792 | fprintf(f, " dbm dbmnz"); |
793 | #endif | |
e6d225ae | 794 | #if defined(LOOKUP_DNSDB) && LOOKUP_DNSDB!=2 |
059ec3d9 PH |
795 | fprintf(f, " dnsdb"); |
796 | #endif | |
e6d225ae | 797 | #if defined(LOOKUP_DSEARCH) && LOOKUP_DSEARCH!=2 |
059ec3d9 PH |
798 | fprintf(f, " dsearch"); |
799 | #endif | |
e6d225ae | 800 | #if defined(LOOKUP_IBASE) && LOOKUP_IBASE!=2 |
059ec3d9 PH |
801 | fprintf(f, " ibase"); |
802 | #endif | |
e6d225ae | 803 | #if defined(LOOKUP_LDAP) && LOOKUP_LDAP!=2 |
059ec3d9 PH |
804 | fprintf(f, " ldap ldapdn ldapm"); |
805 | #endif | |
e6d225ae | 806 | #if defined(LOOKUP_MYSQL) && LOOKUP_MYSQL!=2 |
059ec3d9 PH |
807 | fprintf(f, " mysql"); |
808 | #endif | |
e6d225ae | 809 | #if defined(LOOKUP_NIS) && LOOKUP_NIS!=2 |
059ec3d9 PH |
810 | fprintf(f, " nis nis0"); |
811 | #endif | |
e6d225ae | 812 | #if defined(LOOKUP_NISPLUS) && LOOKUP_NISPLUS!=2 |
059ec3d9 PH |
813 | fprintf(f, " nisplus"); |
814 | #endif | |
e6d225ae | 815 | #if defined(LOOKUP_ORACLE) && LOOKUP_ORACLE!=2 |
059ec3d9 PH |
816 | fprintf(f, " oracle"); |
817 | #endif | |
e6d225ae | 818 | #if defined(LOOKUP_PASSWD) && LOOKUP_PASSWD!=2 |
059ec3d9 PH |
819 | fprintf(f, " passwd"); |
820 | #endif | |
e6d225ae | 821 | #if defined(LOOKUP_PGSQL) && LOOKUP_PGSQL!=2 |
059ec3d9 PH |
822 | fprintf(f, " pgsql"); |
823 | #endif | |
e6d225ae | 824 | #if defined(LOOKUP_SQLITE) && LOOKUP_SQLITE!=2 |
13b685f9 PH |
825 | fprintf(f, " sqlite"); |
826 | #endif | |
e6d225ae | 827 | #if defined(LOOKUP_TESTDB) && LOOKUP_TESTDB!=2 |
059ec3d9 PH |
828 | fprintf(f, " testdb"); |
829 | #endif | |
e6d225ae | 830 | #if defined(LOOKUP_WHOSON) && LOOKUP_WHOSON!=2 |
059ec3d9 PH |
831 | fprintf(f, " whoson"); |
832 | #endif | |
833 | fprintf(f, "\n"); | |
834 | ||
835 | fprintf(f, "Authenticators:"); | |
836 | #ifdef AUTH_CRAM_MD5 | |
837 | fprintf(f, " cram_md5"); | |
838 | #endif | |
839 | #ifdef AUTH_CYRUS_SASL | |
840 | fprintf(f, " cyrus_sasl"); | |
841 | #endif | |
14aa5a05 PH |
842 | #ifdef AUTH_DOVECOT |
843 | fprintf(f, " dovecot"); | |
844 | #endif | |
059ec3d9 PH |
845 | #ifdef AUTH_PLAINTEXT |
846 | fprintf(f, " plaintext"); | |
847 | #endif | |
848 | #ifdef AUTH_SPA | |
849 | fprintf(f, " spa"); | |
850 | #endif | |
851 | fprintf(f, "\n"); | |
852 | ||
853 | fprintf(f, "Routers:"); | |
854 | #ifdef ROUTER_ACCEPT | |
855 | fprintf(f, " accept"); | |
856 | #endif | |
857 | #ifdef ROUTER_DNSLOOKUP | |
858 | fprintf(f, " dnslookup"); | |
859 | #endif | |
860 | #ifdef ROUTER_IPLITERAL | |
861 | fprintf(f, " ipliteral"); | |
862 | #endif | |
863 | #ifdef ROUTER_IPLOOKUP | |
864 | fprintf(f, " iplookup"); | |
865 | #endif | |
866 | #ifdef ROUTER_MANUALROUTE | |
867 | fprintf(f, " manualroute"); | |
868 | #endif | |
869 | #ifdef ROUTER_QUERYPROGRAM | |
870 | fprintf(f, " queryprogram"); | |
871 | #endif | |
872 | #ifdef ROUTER_REDIRECT | |
873 | fprintf(f, " redirect"); | |
874 | #endif | |
875 | fprintf(f, "\n"); | |
876 | ||
877 | fprintf(f, "Transports:"); | |
878 | #ifdef TRANSPORT_APPENDFILE | |
879 | fprintf(f, " appendfile"); | |
880 | #ifdef SUPPORT_MAILDIR | |
881 | fprintf(f, "/maildir"); | |
882 | #endif | |
883 | #ifdef SUPPORT_MAILSTORE | |
884 | fprintf(f, "/mailstore"); | |
885 | #endif | |
886 | #ifdef SUPPORT_MBX | |
887 | fprintf(f, "/mbx"); | |
888 | #endif | |
889 | #endif | |
890 | #ifdef TRANSPORT_AUTOREPLY | |
891 | fprintf(f, " autoreply"); | |
892 | #endif | |
893 | #ifdef TRANSPORT_LMTP | |
894 | fprintf(f, " lmtp"); | |
895 | #endif | |
896 | #ifdef TRANSPORT_PIPE | |
897 | fprintf(f, " pipe"); | |
898 | #endif | |
899 | #ifdef TRANSPORT_SMTP | |
900 | fprintf(f, " smtp"); | |
901 | #endif | |
902 | fprintf(f, "\n"); | |
903 | ||
904 | if (fixed_never_users[0] > 0) | |
905 | { | |
906 | int i; | |
907 | fprintf(f, "Fixed never_users: "); | |
908 | for (i = 1; i <= (int)fixed_never_users[0] - 1; i++) | |
909 | fprintf(f, "%d:", (unsigned int)fixed_never_users[i]); | |
910 | fprintf(f, "%d\n", (unsigned int)fixed_never_users[i]); | |
911 | } | |
21c28500 | 912 | |
73a46702 | 913 | fprintf(f, "Size of off_t: " SIZE_T_FMT "\n", sizeof(off_t)); |
36f12725 NM |
914 | |
915 | /* This runtime check is to help diagnose library linkage mismatches which | |
916 | result in segfaults and the like; as such, it's left until the end, | |
917 | just in case. There will still be a "Configuration file is" line still to | |
918 | come. */ | |
919 | #ifdef SUPPORT_TLS | |
920 | tls_version_report(f); | |
921 | #endif | |
6545de78 PP |
922 | |
923 | /* Everything else is details which are only worth reporting when debugging. | |
924 | Perhaps the tls_version_report should move into this too. */ | |
925 | DEBUG(D_any) do { | |
926 | ||
927 | int i; | |
928 | ||
b3c261f7 PP |
929 | /* clang defines __GNUC__ (at least, for me) so test for it first */ |
930 | #if defined(__clang__) | |
931 | fprintf(f, "Compiler: CLang [%s]\n", __clang_version__); | |
932 | #elif defined(__GNUC__) | |
933 | fprintf(f, "Compiler: GCC [%s]\n", | |
934 | # ifdef __VERSION__ | |
935 | __VERSION__ | |
936 | # else | |
937 | "? unknown version ?" | |
938 | # endif | |
939 | ); | |
940 | #else | |
941 | fprintf(f, "Compiler: <unknown>\n"); | |
942 | #endif | |
943 | ||
6545de78 PP |
944 | #ifdef AUTH_CYRUS_SASL |
945 | auth_cyrus_sasl_version_report(f); | |
946 | #endif | |
947 | ||
948 | fprintf(f, "Library version: PCRE: Compile: %d.%d%s\n" | |
949 | " Runtime: %s\n", | |
950 | PCRE_MAJOR, PCRE_MINOR, | |
951 | /* PRE_PRERELEASE is either defined and empty or a string. | |
aa097c4c NM |
952 | * unless its an ancient version of PCRE in which case it |
953 | * is not defined */ | |
954 | #ifdef PCRE_PRERELEASE | |
6545de78 | 955 | PCRE_PRERELEASE "", |
aa097c4c NM |
956 | #else |
957 | "", | |
958 | #endif | |
6545de78 PP |
959 | pcre_version()); |
960 | ||
961 | init_lookup_list(); | |
962 | for (i = 0; i < lookup_list_count; i++) | |
963 | { | |
964 | if (lookup_list[i]->version_report) | |
965 | lookup_list[i]->version_report(f); | |
966 | } | |
967 | ||
b70d2586 PP |
968 | #ifdef WHITELIST_D_MACROS |
969 | fprintf(f, "WHITELIST_D_MACROS: \"%s\"\n", WHITELIST_D_MACROS); | |
970 | #else | |
971 | fprintf(f, "WHITELIST_D_MACROS unset\n"); | |
972 | #endif | |
973 | #ifdef TRUSTED_CONFIG_LIST | |
974 | fprintf(f, "TRUSTED_CONFIG_LIST: \"%s\"\n", TRUSTED_CONFIG_LIST); | |
975 | #else | |
976 | fprintf(f, "TRUSTED_CONFIG_LIST unset\n"); | |
977 | #endif | |
978 | ||
6545de78 | 979 | } while (0); |
059ec3d9 PH |
980 | } |
981 | ||
982 | ||
983 | ||
984 | ||
985 | /************************************************* | |
986 | * Quote a local part * | |
987 | *************************************************/ | |
988 | ||
989 | /* This function is used when a sender address or a From: or Sender: header | |
990 | line is being created from the caller's login, or from an authenticated_id. It | |
991 | applies appropriate quoting rules for a local part. | |
992 | ||
993 | Argument: the local part | |
994 | Returns: the local part, quoted if necessary | |
995 | */ | |
996 | ||
997 | uschar * | |
998 | local_part_quote(uschar *lpart) | |
999 | { | |
1000 | BOOL needs_quote = FALSE; | |
1001 | int size, ptr; | |
1002 | uschar *yield; | |
1003 | uschar *t; | |
1004 | ||
1005 | for (t = lpart; !needs_quote && *t != 0; t++) | |
1006 | { | |
1007 | needs_quote = !isalnum(*t) && strchr("!#$%&'*+-/=?^_`{|}~", *t) == NULL && | |
1008 | (*t != '.' || t == lpart || t[1] == 0); | |
1009 | } | |
1010 | ||
1011 | if (!needs_quote) return lpart; | |
1012 | ||
1013 | size = ptr = 0; | |
1014 | yield = string_cat(NULL, &size, &ptr, US"\"", 1); | |
1015 | ||
1016 | for (;;) | |
1017 | { | |
1018 | uschar *nq = US Ustrpbrk(lpart, "\\\""); | |
1019 | if (nq == NULL) | |
1020 | { | |
1021 | yield = string_cat(yield, &size, &ptr, lpart, Ustrlen(lpart)); | |
1022 | break; | |
1023 | } | |
1024 | yield = string_cat(yield, &size, &ptr, lpart, nq - lpart); | |
1025 | yield = string_cat(yield, &size, &ptr, US"\\", 1); | |
1026 | yield = string_cat(yield, &size, &ptr, nq, 1); | |
1027 | lpart = nq + 1; | |
1028 | } | |
1029 | ||
1030 | yield = string_cat(yield, &size, &ptr, US"\"", 1); | |
1031 | yield[ptr] = 0; | |
1032 | return yield; | |
1033 | } | |
1034 | ||
1035 | ||
1036 | ||
1037 | #ifdef USE_READLINE | |
1038 | /************************************************* | |
1039 | * Load readline() functions * | |
1040 | *************************************************/ | |
1041 | ||
1042 | /* This function is called from testing executions that read data from stdin, | |
1043 | but only when running as the calling user. Currently, only -be does this. The | |
1044 | function loads the readline() function library and passes back the functions. | |
1045 | On some systems, it needs the curses library, so load that too, but try without | |
1046 | it if loading fails. All this functionality has to be requested at build time. | |
1047 | ||
1048 | Arguments: | |
1049 | fn_readline_ptr pointer to where to put the readline pointer | |
1050 | fn_addhist_ptr pointer to where to put the addhistory function | |
1051 | ||
1052 | Returns: the dlopen handle or NULL on failure | |
1053 | */ | |
1054 | ||
1055 | static void * | |
1ba28e2b PP |
1056 | set_readline(char * (**fn_readline_ptr)(const char *), |
1057 | void (**fn_addhist_ptr)(const char *)) | |
059ec3d9 PH |
1058 | { |
1059 | void *dlhandle; | |
1060 | void *dlhandle_curses = dlopen("libcurses.so", RTLD_GLOBAL|RTLD_LAZY); | |
1061 | ||
1062 | dlhandle = dlopen("libreadline.so", RTLD_GLOBAL|RTLD_NOW); | |
1063 | if (dlhandle_curses != NULL) dlclose(dlhandle_curses); | |
1064 | ||
1065 | if (dlhandle != NULL) | |
1066 | { | |
1ba28e2b PP |
1067 | /* Checked manual pages; at least in GNU Readline 6.1, the prototypes are: |
1068 | * char * readline (const char *prompt); | |
1069 | * void add_history (const char *string); | |
1070 | */ | |
1071 | *fn_readline_ptr = (char *(*)(const char*))dlsym(dlhandle, "readline"); | |
1072 | *fn_addhist_ptr = (void(*)(const char*))dlsym(dlhandle, "add_history"); | |
059ec3d9 PH |
1073 | } |
1074 | else | |
1075 | { | |
1076 | DEBUG(D_any) debug_printf("failed to load readline: %s\n", dlerror()); | |
1077 | } | |
1078 | ||
1079 | return dlhandle; | |
1080 | } | |
1081 | #endif | |
1082 | ||
1083 | ||
1084 | ||
1085 | /************************************************* | |
1086 | * Get a line from stdin for testing things * | |
1087 | *************************************************/ | |
1088 | ||
1089 | /* This function is called when running tests that can take a number of lines | |
1090 | of input (for example, -be and -bt). It handles continuations and trailing | |
1091 | spaces. And prompting and a blank line output on eof. If readline() is in use, | |
1092 | the arguments are non-NULL and provide the relevant functions. | |
1093 | ||
1094 | Arguments: | |
1095 | fn_readline readline function or NULL | |
1096 | fn_addhist addhist function or NULL | |
1097 | ||
1098 | Returns: pointer to dynamic memory, or NULL at end of file | |
1099 | */ | |
1100 | ||
1101 | static uschar * | |
1ba28e2b | 1102 | get_stdinput(char *(*fn_readline)(const char *), void(*fn_addhist)(const char *)) |
059ec3d9 PH |
1103 | { |
1104 | int i; | |
1105 | int size = 0; | |
1106 | int ptr = 0; | |
1107 | uschar *yield = NULL; | |
1108 | ||
328895cc | 1109 | if (fn_readline == NULL) { printf("> "); fflush(stdout); } |
059ec3d9 PH |
1110 | |
1111 | for (i = 0;; i++) | |
1112 | { | |
1113 | uschar buffer[1024]; | |
1114 | uschar *p, *ss; | |
1115 | ||
1116 | #ifdef USE_READLINE | |
1117 | char *readline_line = NULL; | |
1118 | if (fn_readline != NULL) | |
1119 | { | |
1120 | if ((readline_line = fn_readline((i > 0)? "":"> ")) == NULL) break; | |
1121 | if (*readline_line != 0 && fn_addhist != NULL) fn_addhist(readline_line); | |
1122 | p = US readline_line; | |
1123 | } | |
1124 | else | |
1125 | #endif | |
1126 | ||
1127 | /* readline() not in use */ | |
1128 | ||
1129 | { | |
1130 | if (Ufgets(buffer, sizeof(buffer), stdin) == NULL) break; | |
1131 | p = buffer; | |
1132 | } | |
1133 | ||
1134 | /* Handle the line */ | |
1135 | ||
1136 | ss = p + (int)Ustrlen(p); | |
1137 | while (ss > p && isspace(ss[-1])) ss--; | |
1138 | ||
1139 | if (i > 0) | |
1140 | { | |
1141 | while (p < ss && isspace(*p)) p++; /* leading space after cont */ | |
1142 | } | |
1143 | ||
1144 | yield = string_cat(yield, &size, &ptr, p, ss - p); | |
1145 | ||
1146 | #ifdef USE_READLINE | |
1147 | if (fn_readline != NULL) free(readline_line); | |
1148 | #endif | |
1149 | ||
1150 | if (ss == p || yield[ptr-1] != '\\') | |
1151 | { | |
1152 | yield[ptr] = 0; | |
1153 | break; | |
1154 | } | |
1155 | yield[--ptr] = 0; | |
1156 | } | |
1157 | ||
1158 | if (yield == NULL) printf("\n"); | |
1159 | return yield; | |
1160 | } | |
1161 | ||
1162 | ||
1163 | ||
81ea09ca NM |
1164 | /************************************************* |
1165 | * Output usage information for the program * | |
1166 | *************************************************/ | |
1167 | ||
1168 | /* This function is called when there are no recipients | |
1169 | or a specific --help argument was added. | |
1170 | ||
1171 | Arguments: | |
1172 | progname information on what name we were called by | |
1173 | ||
1174 | Returns: DOES NOT RETURN | |
1175 | */ | |
1176 | ||
1177 | static void | |
1178 | exim_usage(uschar *progname) | |
1179 | { | |
1180 | ||
1181 | /* Handle specific program invocation varients */ | |
1182 | if (Ustrcmp(progname, US"-mailq") == 0) | |
1183 | { | |
1184 | fprintf(stderr, | |
e765a0f1 | 1185 | "mailq - list the contents of the mail queue\n\n" |
81ea09ca NM |
1186 | "For a list of options, see the Exim documentation.\n"); |
1187 | exit(EXIT_FAILURE); | |
1188 | } | |
1189 | ||
1190 | /* Generic usage - we output this whatever happens */ | |
1191 | fprintf(stderr, | |
1192 | "Exim is a Mail Transfer Agent. It is normally called by Mail User Agents,\n" | |
1193 | "not directly from a shell command line. Options and/or arguments control\n" | |
1194 | "what it does when called. For a list of options, see the Exim documentation.\n"); | |
1195 | ||
1196 | exit(EXIT_FAILURE); | |
1197 | } | |
1198 | ||
1199 | ||
1200 | ||
a7cbbf50 PP |
1201 | /************************************************* |
1202 | * Validate that the macros given are okay * | |
1203 | *************************************************/ | |
1204 | ||
1205 | /* Typically, Exim will drop privileges if macros are supplied. In some | |
1206 | cases, we want to not do so. | |
1207 | ||
1208 | Arguments: none (macros is a global) | |
1209 | Returns: true if trusted, false otherwise | |
1210 | */ | |
1211 | ||
1212 | static BOOL | |
1213 | macros_trusted(void) | |
1214 | { | |
1215 | #ifdef WHITELIST_D_MACROS | |
1216 | macro_item *m; | |
1217 | uschar *whitelisted, *end, *p, **whites, **w; | |
1218 | int white_count, i, n; | |
1219 | size_t len; | |
1220 | BOOL prev_char_item, found; | |
1221 | #endif | |
1222 | ||
1223 | if (macros == NULL) | |
1224 | return TRUE; | |
1225 | #ifndef WHITELIST_D_MACROS | |
1226 | return FALSE; | |
1227 | #else | |
1228 | ||
66581d1e PP |
1229 | /* We only trust -D overrides for some invoking users: |
1230 | root, the exim run-time user, the optional config owner user. | |
1231 | I don't know why config-owner would be needed, but since they can own the | |
1232 | config files anyway, there's no security risk to letting them override -D. */ | |
1233 | if ( ! ((real_uid == root_uid) | |
1234 | || (real_uid == exim_uid) | |
1235 | #ifdef CONFIGURE_OWNER | |
1236 | || (real_uid == config_uid) | |
1237 | #endif | |
1238 | )) | |
1239 | { | |
1240 | debug_printf("macros_trusted rejecting macros for uid %d\n", (int) real_uid); | |
1241 | return FALSE; | |
1242 | } | |
1243 | ||
a7cbbf50 PP |
1244 | /* Get a list of macros which are whitelisted */ |
1245 | whitelisted = string_copy_malloc(US WHITELIST_D_MACROS); | |
1246 | prev_char_item = FALSE; | |
1247 | white_count = 0; | |
1248 | for (p = whitelisted; *p != '\0'; ++p) | |
1249 | { | |
1250 | if (*p == ':' || isspace(*p)) | |
1251 | { | |
1252 | *p = '\0'; | |
1253 | if (prev_char_item) | |
1254 | ++white_count; | |
1255 | prev_char_item = FALSE; | |
1256 | continue; | |
1257 | } | |
1258 | if (!prev_char_item) | |
1259 | prev_char_item = TRUE; | |
1260 | } | |
1261 | end = p; | |
1262 | if (prev_char_item) | |
1263 | ++white_count; | |
1264 | if (!white_count) | |
1265 | return FALSE; | |
1266 | whites = store_malloc(sizeof(uschar *) * (white_count+1)); | |
1267 | for (p = whitelisted, i = 0; (p != end) && (i < white_count); ++p) | |
1268 | { | |
1269 | if (*p != '\0') | |
1270 | { | |
1271 | whites[i++] = p; | |
1272 | if (i == white_count) | |
1273 | break; | |
1274 | while (*p != '\0' && p < end) | |
1275 | ++p; | |
1276 | } | |
1277 | } | |
1278 | whites[i] = NULL; | |
1279 | ||
1280 | /* The list of macros should be very short. Accept the N*M complexity. */ | |
1281 | for (m = macros; m != NULL; m = m->next) | |
1282 | { | |
1283 | found = FALSE; | |
1284 | for (w = whites; *w; ++w) | |
1285 | if (Ustrcmp(*w, m->name) == 0) | |
1286 | { | |
1287 | found = TRUE; | |
1288 | break; | |
1289 | } | |
1290 | if (!found) | |
1291 | return FALSE; | |
1292 | if (m->replacement == NULL) | |
1293 | continue; | |
1294 | len = Ustrlen(m->replacement); | |
1295 | if (len == 0) | |
1296 | continue; | |
1297 | n = pcre_exec(regex_whitelisted_macro, NULL, CS m->replacement, len, | |
1298 | 0, PCRE_EOPT, NULL, 0); | |
1299 | if (n < 0) | |
1300 | { | |
1301 | if (n != PCRE_ERROR_NOMATCH) | |
1302 | debug_printf("macros_trusted checking %s returned %d\n", m->name, n); | |
1303 | return FALSE; | |
1304 | } | |
1305 | } | |
ebd9bd7d | 1306 | DEBUG(D_any) debug_printf("macros_trusted overriden to true by whitelisting\n"); |
a7cbbf50 PP |
1307 | return TRUE; |
1308 | #endif | |
1309 | } | |
1310 | ||
1311 | ||
059ec3d9 PH |
1312 | /************************************************* |
1313 | * Entry point and high-level code * | |
1314 | *************************************************/ | |
1315 | ||
1316 | /* Entry point for the Exim mailer. Analyse the arguments and arrange to take | |
1317 | the appropriate action. All the necessary functions are present in the one | |
1318 | binary. I originally thought one should split it up, but it turns out that so | |
1319 | much of the apparatus is needed in each chunk that one might as well just have | |
1320 | it all available all the time, which then makes the coding easier as well. | |
1321 | ||
1322 | Arguments: | |
1323 | argc count of entries in argv | |
1324 | argv argument strings, with argv[0] being the program name | |
1325 | ||
1326 | Returns: EXIT_SUCCESS if terminated successfully | |
1327 | EXIT_FAILURE otherwise, except when a message has been sent | |
1328 | to the sender, and -oee was given | |
1329 | */ | |
1330 | ||
1331 | int | |
1332 | main(int argc, char **cargv) | |
1333 | { | |
1334 | uschar **argv = USS cargv; | |
1335 | int arg_receive_timeout = -1; | |
1336 | int arg_smtp_receive_timeout = -1; | |
1337 | int arg_error_handling = error_handling; | |
f05da2e8 PH |
1338 | int filter_sfd = -1; |
1339 | int filter_ufd = -1; | |
059ec3d9 | 1340 | int group_count; |
1670ef10 | 1341 | int i, rv; |
059ec3d9 PH |
1342 | int list_queue_option = 0; |
1343 | int msg_action = 0; | |
1344 | int msg_action_arg = -1; | |
1345 | int namelen = (argv[0] == NULL)? 0 : Ustrlen(argv[0]); | |
1346 | int queue_only_reason = 0; | |
1347 | #ifdef EXIM_PERL | |
1348 | int perl_start_option = 0; | |
1349 | #endif | |
1350 | int recipients_arg = argc; | |
1351 | int sender_address_domain = 0; | |
1352 | int test_retry_arg = -1; | |
1353 | int test_rewrite_arg = -1; | |
1354 | BOOL arg_queue_only = FALSE; | |
1355 | BOOL bi_option = FALSE; | |
1356 | BOOL checking = FALSE; | |
1357 | BOOL count_queue = FALSE; | |
1358 | BOOL expansion_test = FALSE; | |
1359 | BOOL extract_recipients = FALSE; | |
1360 | BOOL forced_delivery = FALSE; | |
1361 | BOOL f_end_dot = FALSE; | |
1362 | BOOL deliver_give_up = FALSE; | |
1363 | BOOL list_queue = FALSE; | |
1364 | BOOL list_options = FALSE; | |
1365 | BOOL local_queue_only; | |
1366 | BOOL more = TRUE; | |
1367 | BOOL one_msg_action = FALSE; | |
1368 | BOOL queue_only_set = FALSE; | |
1369 | BOOL receiving_message = TRUE; | |
33d73e3b | 1370 | BOOL sender_ident_set = FALSE; |
8669f003 | 1371 | BOOL session_local_queue_only; |
059ec3d9 PH |
1372 | BOOL unprivileged; |
1373 | BOOL removed_privilege = FALSE; | |
81ea09ca | 1374 | BOOL usage_wanted = FALSE; |
059ec3d9 PH |
1375 | BOOL verify_address_mode = FALSE; |
1376 | BOOL verify_as_sender = FALSE; | |
1377 | BOOL version_printed = FALSE; | |
1378 | uschar *alias_arg = NULL; | |
1379 | uschar *called_as = US""; | |
1380 | uschar *start_queue_run_id = NULL; | |
1381 | uschar *stop_queue_run_id = NULL; | |
328895cc | 1382 | uschar *expansion_test_message = NULL; |
059ec3d9 PH |
1383 | uschar *ftest_domain = NULL; |
1384 | uschar *ftest_localpart = NULL; | |
1385 | uschar *ftest_prefix = NULL; | |
1386 | uschar *ftest_suffix = NULL; | |
8544e77a | 1387 | uschar *malware_test_file = NULL; |
059ec3d9 PH |
1388 | uschar *real_sender_address; |
1389 | uschar *originator_home = US"/"; | |
059ec3d9 PH |
1390 | void *reset_point; |
1391 | ||
1392 | struct passwd *pw; | |
1393 | struct stat statbuf; | |
1394 | pid_t passed_qr_pid = (pid_t)0; | |
1395 | int passed_qr_pipe = -1; | |
1396 | gid_t group_list[NGROUPS_MAX]; | |
1397 | ||
1398 | /* Possible options for -R and -S */ | |
1399 | ||
1400 | static uschar *rsopts[] = { US"f", US"ff", US"r", US"rf", US"rff" }; | |
1401 | ||
1402 | /* Need to define this in case we need to change the environment in order | |
1403 | to get rid of a bogus time zone. We have to make it char rather than uschar | |
1404 | because some OS define it in /usr/include/unistd.h. */ | |
1405 | ||
1406 | extern char **environ; | |
1407 | ||
35edf2ff | 1408 | /* If the Exim user and/or group and/or the configuration file owner/group were |
059ec3d9 PH |
1409 | defined by ref:name at build time, we must now find the actual uid/gid values. |
1410 | This is a feature to make the lives of binary distributors easier. */ | |
1411 | ||
1412 | #ifdef EXIM_USERNAME | |
1413 | if (route_finduser(US EXIM_USERNAME, &pw, &exim_uid)) | |
1414 | { | |
10385c15 PP |
1415 | if (exim_uid == 0) |
1416 | { | |
1417 | fprintf(stderr, "exim: refusing to run with uid 0 for \"%s\"\n", | |
1418 | EXIM_USERNAME); | |
1419 | exit(EXIT_FAILURE); | |
1420 | } | |
059ec3d9 PH |
1421 | exim_gid = pw->pw_gid; |
1422 | } | |
1423 | else | |
1424 | { | |
1425 | fprintf(stderr, "exim: failed to find uid for user name \"%s\"\n", | |
1426 | EXIM_USERNAME); | |
1427 | exit(EXIT_FAILURE); | |
1428 | } | |
1429 | #endif | |
1430 | ||
1431 | #ifdef EXIM_GROUPNAME | |
1432 | if (!route_findgroup(US EXIM_GROUPNAME, &exim_gid)) | |
1433 | { | |
1434 | fprintf(stderr, "exim: failed to find gid for group name \"%s\"\n", | |
1435 | EXIM_GROUPNAME); | |
1436 | exit(EXIT_FAILURE); | |
1437 | } | |
1438 | #endif | |
1439 | ||
1440 | #ifdef CONFIGURE_OWNERNAME | |
1441 | if (!route_finduser(US CONFIGURE_OWNERNAME, NULL, &config_uid)) | |
1442 | { | |
1443 | fprintf(stderr, "exim: failed to find uid for user name \"%s\"\n", | |
1444 | CONFIGURE_OWNERNAME); | |
1445 | exit(EXIT_FAILURE); | |
1446 | } | |
1447 | #endif | |
1448 | ||
79d4bc3d PP |
1449 | /* We default the system_filter_user to be the Exim run-time user, as a |
1450 | sane non-root value. */ | |
1451 | system_filter_uid = exim_uid; | |
1452 | ||
35edf2ff PH |
1453 | #ifdef CONFIGURE_GROUPNAME |
1454 | if (!route_findgroup(US CONFIGURE_GROUPNAME, &config_gid)) | |
1455 | { | |
1456 | fprintf(stderr, "exim: failed to find gid for group name \"%s\"\n", | |
1457 | CONFIGURE_GROUPNAME); | |
1458 | exit(EXIT_FAILURE); | |
1459 | } | |
1460 | #endif | |
1461 | ||
059ec3d9 PH |
1462 | /* In the Cygwin environment, some initialization needs doing. It is fudged |
1463 | in by means of this macro. */ | |
1464 | ||
1465 | #ifdef OS_INIT | |
1466 | OS_INIT | |
1467 | #endif | |
1468 | ||
1469 | /* Check a field which is patched when we are running Exim within its | |
1470 | testing harness; do a fast initial check, and then the whole thing. */ | |
1471 | ||
1472 | running_in_test_harness = | |
1473 | *running_status == '<' && Ustrcmp(running_status, "<<<testing>>>") == 0; | |
1474 | ||
1475 | /* The C standard says that the equivalent of setlocale(LC_ALL, "C") is obeyed | |
1476 | at the start of a program; however, it seems that some environments do not | |
1477 | follow this. A "strange" locale can affect the formatting of timestamps, so we | |
1478 | make quite sure. */ | |
1479 | ||
1480 | setlocale(LC_ALL, "C"); | |
1481 | ||
1482 | /* Set up the default handler for timing using alarm(). */ | |
1483 | ||
1484 | os_non_restarting_signal(SIGALRM, sigalrm_handler); | |
1485 | ||
1486 | /* Ensure we have a buffer for constructing log entries. Use malloc directly, | |
1487 | because store_malloc writes a log entry on failure. */ | |
1488 | ||
1489 | log_buffer = (uschar *)malloc(LOG_BUFFER_SIZE); | |
1490 | if (log_buffer == NULL) | |
1491 | { | |
1492 | fprintf(stderr, "exim: failed to get store for log buffer\n"); | |
1493 | exit(EXIT_FAILURE); | |
1494 | } | |
1495 | ||
1496 | /* Set log_stderr to stderr, provided that stderr exists. This gets reset to | |
1497 | NULL when the daemon is run and the file is closed. We have to use this | |
1498 | indirection, because some systems don't allow writing to the variable "stderr". | |
1499 | */ | |
1500 | ||
1501 | if (fstat(fileno(stderr), &statbuf) >= 0) log_stderr = stderr; | |
1502 | ||
1503 | /* Arrange for the PCRE regex library to use our store functions. Note that | |
1504 | the normal calls are actually macros that add additional arguments for | |
1505 | debugging purposes so we have to assign specially constructed functions here. | |
1506 | The default is to use store in the stacking pool, but this is overridden in the | |
1507 | regex_must_compile() function. */ | |
1508 | ||
1509 | pcre_malloc = function_store_get; | |
1510 | pcre_free = function_dummy_free; | |
1511 | ||
1512 | /* Ensure there is a big buffer for temporary use in several places. It is put | |
1513 | in malloc store so that it can be freed for enlargement if necessary. */ | |
1514 | ||
1515 | big_buffer = store_malloc(big_buffer_size); | |
1516 | ||
1517 | /* Set up the handler for the data request signal, and set the initial | |
1518 | descriptive text. */ | |
1519 | ||
1520 | set_process_info("initializing"); | |
1521 | os_restarting_signal(SIGUSR1, usr1_handler); | |
1522 | ||
1523 | /* SIGHUP is used to get the daemon to reconfigure. It gets set as appropriate | |
1524 | in the daemon code. For the rest of Exim's uses, we ignore it. */ | |
1525 | ||
1526 | signal(SIGHUP, SIG_IGN); | |
1527 | ||
1528 | /* We don't want to die on pipe errors as the code is written to handle | |
1529 | the write error instead. */ | |
1530 | ||
1531 | signal(SIGPIPE, SIG_IGN); | |
1532 | ||
1533 | /* Under some circumstance on some OS, Exim can get called with SIGCHLD | |
1534 | set to SIG_IGN. This causes subprocesses that complete before the parent | |
1535 | process waits for them not to hang around, so when Exim calls wait(), nothing | |
1536 | is there. The wait() code has been made robust against this, but let's ensure | |
1537 | that SIGCHLD is set to SIG_DFL, because it's tidier to wait and get a process | |
1538 | ending status. We use sigaction rather than plain signal() on those OS where | |
1539 | SA_NOCLDWAIT exists, because we want to be sure it is turned off. (There was a | |
1540 | problem on AIX with this.) */ | |
1541 | ||
1542 | #ifdef SA_NOCLDWAIT | |
1543 | { | |
1544 | struct sigaction act; | |
1545 | act.sa_handler = SIG_DFL; | |
1546 | sigemptyset(&(act.sa_mask)); | |
1547 | act.sa_flags = 0; | |
1548 | sigaction(SIGCHLD, &act, NULL); | |
1549 | } | |
1550 | #else | |
1551 | signal(SIGCHLD, SIG_DFL); | |
1552 | #endif | |
1553 | ||
1554 | /* Save the arguments for use if we re-exec exim as a daemon after receiving | |
1555 | SIGHUP. */ | |
1556 | ||
1557 | sighup_argv = argv; | |
1558 | ||
1559 | /* Set up the version number. Set up the leading 'E' for the external form of | |
1560 | message ids, set the pointer to the internal form, and initialize it to | |
1561 | indicate no message being processed. */ | |
1562 | ||
1563 | version_init(); | |
1564 | message_id_option[0] = '-'; | |
1565 | message_id_external = message_id_option + 1; | |
1566 | message_id_external[0] = 'E'; | |
1567 | message_id = message_id_external + 1; | |
1568 | message_id[0] = 0; | |
1569 | ||
67d175de | 1570 | /* Set the umask to zero so that any files Exim creates using open() are |
2632889e PH |
1571 | created with the modes that it specifies. NOTE: Files created with fopen() have |
1572 | a problem, which was not recognized till rather late (February 2006). With this | |
1573 | umask, such files will be world writeable. (They are all content scanning files | |
1574 | in the spool directory, which isn't world-accessible, so this is not a | |
1575 | disaster, but it's untidy.) I don't want to change this overall setting, | |
1576 | however, because it will interact badly with the open() calls. Instead, there's | |
1577 | now a function called modefopen() that fiddles with the umask while calling | |
1578 | fopen(). */ | |
059ec3d9 | 1579 | |
67d175de | 1580 | (void)umask(0); |
059ec3d9 PH |
1581 | |
1582 | /* Precompile the regular expression for matching a message id. Keep this in | |
1583 | step with the code that generates ids in the accept.c module. We need to do | |
1584 | this here, because the -M options check their arguments for syntactic validity | |
1585 | using mac_ismsgid, which uses this. */ | |
1586 | ||
1587 | regex_ismsgid = | |
1588 | regex_must_compile(US"^(?:[^\\W_]{6}-){2}[^\\W_]{2}$", FALSE, TRUE); | |
1589 | ||
a5bd321b | 1590 | /* Precompile the regular expression that is used for matching an SMTP error |
d6a96edc PH |
1591 | code, possibly extended, at the start of an error message. Note that the |
1592 | terminating whitespace character is included. */ | |
a5bd321b PH |
1593 | |
1594 | regex_smtp_code = | |
1595 | regex_must_compile(US"^\\d\\d\\d\\s(?:\\d\\.\\d\\d?\\d?\\.\\d\\d?\\d?\\s)?", | |
1596 | FALSE, TRUE); | |
1597 | ||
a7cbbf50 PP |
1598 | #ifdef WHITELIST_D_MACROS |
1599 | /* Precompile the regular expression used to filter the content of macros | |
1600 | given to -D for permissibility. */ | |
1601 | ||
1602 | regex_whitelisted_macro = | |
1603 | regex_must_compile(US"^[A-Za-z0-9_/.-]*$", FALSE, TRUE); | |
1604 | #endif | |
1605 | ||
1606 | ||
059ec3d9 PH |
1607 | /* If the program is called as "mailq" treat it as equivalent to "exim -bp"; |
1608 | this seems to be a generally accepted convention, since one finds symbolic | |
1609 | links called "mailq" in standard OS configurations. */ | |
1610 | ||
1611 | if ((namelen == 5 && Ustrcmp(argv[0], "mailq") == 0) || | |
1612 | (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/mailq", 6) == 0)) | |
1613 | { | |
1614 | list_queue = TRUE; | |
1615 | receiving_message = FALSE; | |
1616 | called_as = US"-mailq"; | |
1617 | } | |
1618 | ||
1619 | /* If the program is called as "rmail" treat it as equivalent to | |
1620 | "exim -i -oee", thus allowing UUCP messages to be input using non-SMTP mode, | |
1621 | i.e. preventing a single dot on a line from terminating the message, and | |
1622 | returning with zero return code, even in cases of error (provided an error | |
1623 | message has been sent). */ | |
1624 | ||
1625 | if ((namelen == 5 && Ustrcmp(argv[0], "rmail") == 0) || | |
1626 | (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rmail", 6) == 0)) | |
1627 | { | |
1628 | dot_ends = FALSE; | |
1629 | called_as = US"-rmail"; | |
1630 | errors_sender_rc = EXIT_SUCCESS; | |
1631 | } | |
1632 | ||
1633 | /* If the program is called as "rsmtp" treat it as equivalent to "exim -bS"; | |
1634 | this is a smail convention. */ | |
1635 | ||
1636 | if ((namelen == 5 && Ustrcmp(argv[0], "rsmtp") == 0) || | |
1637 | (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rsmtp", 6) == 0)) | |
1638 | { | |
1639 | smtp_input = smtp_batched_input = TRUE; | |
1640 | called_as = US"-rsmtp"; | |
1641 | } | |
1642 | ||
1643 | /* If the program is called as "runq" treat it as equivalent to "exim -q"; | |
1644 | this is a smail convention. */ | |
1645 | ||
1646 | if ((namelen == 4 && Ustrcmp(argv[0], "runq") == 0) || | |
1647 | (namelen > 4 && Ustrncmp(argv[0] + namelen - 5, "/runq", 5) == 0)) | |
1648 | { | |
1649 | queue_interval = 0; | |
1650 | receiving_message = FALSE; | |
1651 | called_as = US"-runq"; | |
1652 | } | |
1653 | ||
1654 | /* If the program is called as "newaliases" treat it as equivalent to | |
1655 | "exim -bi"; this is a sendmail convention. */ | |
1656 | ||
1657 | if ((namelen == 10 && Ustrcmp(argv[0], "newaliases") == 0) || | |
1658 | (namelen > 10 && Ustrncmp(argv[0] + namelen - 11, "/newaliases", 11) == 0)) | |
1659 | { | |
1660 | bi_option = TRUE; | |
1661 | receiving_message = FALSE; | |
1662 | called_as = US"-newaliases"; | |
1663 | } | |
1664 | ||
1665 | /* Save the original effective uid for a couple of uses later. It should | |
1666 | normally be root, but in some esoteric environments it may not be. */ | |
1667 | ||
1668 | original_euid = geteuid(); | |
1669 | ||
1670 | /* Get the real uid and gid. If the caller is root, force the effective uid/gid | |
1671 | to be the same as the real ones. This makes a difference only if Exim is setuid | |
1672 | (or setgid) to something other than root, which could be the case in some | |
1673 | special configurations. */ | |
1674 | ||
1675 | real_uid = getuid(); | |
1676 | real_gid = getgid(); | |
1677 | ||
1678 | if (real_uid == root_uid) | |
1679 | { | |
1670ef10 PP |
1680 | rv = setgid(real_gid); |
1681 | if (rv) | |
1682 | { | |
1683 | fprintf(stderr, "exim: setgid(%ld) failed: %s\n", | |
1684 | (long int)real_gid, strerror(errno)); | |
1685 | exit(EXIT_FAILURE); | |
1686 | } | |
1687 | rv = setuid(real_uid); | |
1688 | if (rv) | |
1689 | { | |
1690 | fprintf(stderr, "exim: setuid(%ld) failed: %s\n", | |
1691 | (long int)real_uid, strerror(errno)); | |
1692 | exit(EXIT_FAILURE); | |
1693 | } | |
059ec3d9 PH |
1694 | } |
1695 | ||
1696 | /* If neither the original real uid nor the original euid was root, Exim is | |
1697 | running in an unprivileged state. */ | |
1698 | ||
1699 | unprivileged = (real_uid != root_uid && original_euid != root_uid); | |
1700 | ||
059ec3d9 PH |
1701 | /* Scan the program's arguments. Some can be dealt with right away; others are |
1702 | simply recorded for checking and handling afterwards. Do a high-level switch | |
1703 | on the second character (the one after '-'), to save some effort. */ | |
1704 | ||
1705 | for (i = 1; i < argc; i++) | |
1706 | { | |
1707 | BOOL badarg = FALSE; | |
1708 | uschar *arg = argv[i]; | |
1709 | uschar *argrest; | |
1710 | int switchchar; | |
1711 | ||
1712 | /* An argument not starting with '-' is the start of a recipients list; | |
1713 | break out of the options-scanning loop. */ | |
1714 | ||
1715 | if (arg[0] != '-') | |
1716 | { | |
1717 | recipients_arg = i; | |
1718 | break; | |
1719 | } | |
1720 | ||
1721 | /* An option consistion of -- terminates the options */ | |
1722 | ||
1723 | if (Ustrcmp(arg, "--") == 0) | |
1724 | { | |
1725 | recipients_arg = i + 1; | |
1726 | break; | |
1727 | } | |
1728 | ||
1729 | /* Handle flagged options */ | |
1730 | ||
1731 | switchchar = arg[1]; | |
1732 | argrest = arg+2; | |
1733 | ||
1734 | /* Make all -ex options synonymous with -oex arguments, since that | |
1735 | is assumed by various callers. Also make -qR options synonymous with -R | |
1736 | options, as that seems to be required as well. Allow for -qqR too, and | |
1737 | the same for -S options. */ | |
1738 | ||
1739 | if (Ustrncmp(arg+1, "oe", 2) == 0 || | |
1740 | Ustrncmp(arg+1, "qR", 2) == 0 || | |
1741 | Ustrncmp(arg+1, "qS", 2) == 0) | |
1742 | { | |
1743 | switchchar = arg[2]; | |
1744 | argrest++; | |
1745 | } | |
1746 | else if (Ustrncmp(arg+1, "qqR", 3) == 0 || Ustrncmp(arg+1, "qqS", 3) == 0) | |
1747 | { | |
1748 | switchchar = arg[3]; | |
1749 | argrest += 2; | |
1750 | queue_2stage = TRUE; | |
1751 | } | |
1752 | ||
1753 | /* Make -r synonymous with -f, since it is a documented alias */ | |
1754 | ||
1755 | else if (arg[1] == 'r') switchchar = 'f'; | |
1756 | ||
1757 | /* Make -ov synonymous with -v */ | |
1758 | ||
1759 | else if (Ustrcmp(arg, "-ov") == 0) | |
1760 | { | |
1761 | switchchar = 'v'; | |
1762 | argrest++; | |
1763 | } | |
1764 | ||
4b2241d2 PP |
1765 | /* deal with --option_aliases */ |
1766 | else if (switchchar == '-') | |
1767 | { | |
1768 | if (Ustrcmp(argrest, "help") == 0) | |
1769 | { | |
1770 | usage_wanted = TRUE; | |
1771 | break; | |
1772 | } | |
1773 | else if (Ustrcmp(argrest, "version") == 0) | |
1774 | { | |
1775 | switchchar = 'b'; | |
73a46702 | 1776 | argrest = US"V"; |
4b2241d2 PP |
1777 | } |
1778 | } | |
1779 | ||
059ec3d9 PH |
1780 | /* High-level switch on active initial letter */ |
1781 | ||
1782 | switch(switchchar) | |
1783 | { | |
1784 | /* -Btype is a sendmail option for 7bit/8bit setting. Exim is 8-bit clean | |
1785 | so has no need of it. */ | |
1786 | ||
1787 | case 'B': | |
1788 | if (*argrest == 0) i++; /* Skip over the type */ | |
1789 | break; | |
1790 | ||
1791 | ||
1792 | case 'b': | |
1793 | receiving_message = FALSE; /* Reset TRUE for -bm, -bS, -bs below */ | |
1794 | ||
1795 | /* -bd: Run in daemon mode, awaiting SMTP connections. | |
1796 | -bdf: Ditto, but in the foreground. | |
1797 | */ | |
1798 | ||
1799 | if (*argrest == 'd') | |
1800 | { | |
1801 | daemon_listen = TRUE; | |
1802 | if (*(++argrest) == 'f') background_daemon = FALSE; | |
1803 | else if (*argrest != 0) { badarg = TRUE; break; } | |
1804 | } | |
1805 | ||
328895cc PH |
1806 | /* -be: Run in expansion test mode |
1807 | -bem: Ditto, but read a message from a file first | |
1808 | */ | |
059ec3d9 PH |
1809 | |
1810 | else if (*argrest == 'e') | |
328895cc | 1811 | { |
059ec3d9 | 1812 | expansion_test = checking = TRUE; |
328895cc PH |
1813 | if (argrest[1] == 'm') |
1814 | { | |
1815 | if (++i >= argc) { badarg = TRUE; break; } | |
1816 | expansion_test_message = argv[i]; | |
1817 | argrest++; | |
1818 | } | |
1819 | if (argrest[1] != 0) { badarg = TRUE; break; } | |
1820 | } | |
059ec3d9 | 1821 | |
f05da2e8 PH |
1822 | /* -bF: Run system filter test */ |
1823 | ||
1824 | else if (*argrest == 'F') | |
1825 | { | |
1826 | filter_test |= FTEST_SYSTEM; | |
1827 | if (*(++argrest) != 0) { badarg = TRUE; break; } | |
1828 | if (++i < argc) filter_test_sfile = argv[i]; else | |
1829 | { | |
1830 | fprintf(stderr, "exim: file name expected after %s\n", argv[i-1]); | |
1831 | exit(EXIT_FAILURE); | |
1832 | } | |
1833 | } | |
1834 | ||
1835 | /* -bf: Run user filter test | |
059ec3d9 PH |
1836 | -bfd: Set domain for filter testing |
1837 | -bfl: Set local part for filter testing | |
1838 | -bfp: Set prefix for filter testing | |
1839 | -bfs: Set suffix for filter testing | |
1840 | */ | |
1841 | ||
f05da2e8 | 1842 | else if (*argrest == 'f') |
059ec3d9 | 1843 | { |
f05da2e8 | 1844 | if (*(++argrest) == 0) |
059ec3d9 | 1845 | { |
f05da2e8 PH |
1846 | filter_test |= FTEST_USER; |
1847 | if (++i < argc) filter_test_ufile = argv[i]; else | |
059ec3d9 PH |
1848 | { |
1849 | fprintf(stderr, "exim: file name expected after %s\n", argv[i-1]); | |
1850 | exit(EXIT_FAILURE); | |
1851 | } | |
1852 | } | |
1853 | else | |
1854 | { | |
1855 | if (++i >= argc) | |
1856 | { | |
1857 | fprintf(stderr, "exim: string expected after %s\n", arg); | |
1858 | exit(EXIT_FAILURE); | |
1859 | } | |
1860 | if (Ustrcmp(argrest, "d") == 0) ftest_domain = argv[i]; | |
1861 | else if (Ustrcmp(argrest, "l") == 0) ftest_localpart = argv[i]; | |
1862 | else if (Ustrcmp(argrest, "p") == 0) ftest_prefix = argv[i]; | |
1863 | else if (Ustrcmp(argrest, "s") == 0) ftest_suffix = argv[i]; | |
1864 | else { badarg = TRUE; break; } | |
1865 | } | |
1866 | } | |
1867 | ||
1868 | /* -bh: Host checking - an IP address must follow. */ | |
1869 | ||
1870 | else if (Ustrcmp(argrest, "h") == 0 || Ustrcmp(argrest, "hc") == 0) | |
1871 | { | |
1872 | if (++i >= argc) { badarg = TRUE; break; } | |
1873 | sender_host_address = argv[i]; | |
1874 | host_checking = checking = log_testing_mode = TRUE; | |
1875 | host_checking_callout = argrest[1] == 'c'; | |
1876 | } | |
1877 | ||
1878 | /* -bi: This option is used by sendmail to initialize *the* alias file, | |
1879 | though it has the -oA option to specify a different file. Exim has no | |
1880 | concept of *the* alias file, but since Sun's YP make script calls | |
1881 | sendmail this way, some support must be provided. */ | |
1882 | ||
1883 | else if (Ustrcmp(argrest, "i") == 0) bi_option = TRUE; | |
1884 | ||
1885 | /* -bm: Accept and deliver message - the default option. Reinstate | |
1886 | receiving_message, which got turned off for all -b options. */ | |
1887 | ||
1888 | else if (Ustrcmp(argrest, "m") == 0) receiving_message = TRUE; | |
1889 | ||
8544e77a PP |
1890 | /* -bmalware: test the filename given for malware */ |
1891 | ||
1892 | else if (Ustrcmp(argrest, "malware") == 0) | |
1893 | { | |
1894 | if (++i >= argc) { badarg = TRUE; break; } | |
1895 | malware_test_file = argv[i]; | |
1896 | } | |
1897 | ||
059ec3d9 PH |
1898 | /* -bnq: For locally originating messages, do not qualify unqualified |
1899 | addresses. In the envelope, this causes errors; in header lines they | |
1900 | just get left. */ | |
1901 | ||
1902 | else if (Ustrcmp(argrest, "nq") == 0) | |
1903 | { | |
1904 | allow_unqualified_sender = FALSE; | |
1905 | allow_unqualified_recipient = FALSE; | |
1906 | } | |
1907 | ||
1908 | /* -bpxx: List the contents of the mail queue, in various forms. If | |
1909 | the option is -bpc, just a queue count is needed. Otherwise, if the | |
1910 | first letter after p is r, then order is random. */ | |
1911 | ||
1912 | else if (*argrest == 'p') | |
1913 | { | |
1914 | if (*(++argrest) == 'c') | |
1915 | { | |
1916 | count_queue = TRUE; | |
1917 | if (*(++argrest) != 0) badarg = TRUE; | |
1918 | break; | |
1919 | } | |
1920 | ||
1921 | if (*argrest == 'r') | |
1922 | { | |
1923 | list_queue_option = 8; | |
1924 | argrest++; | |
1925 | } | |
1926 | else list_queue_option = 0; | |
1927 | ||
1928 | list_queue = TRUE; | |
1929 | ||
1930 | /* -bp: List the contents of the mail queue, top-level only */ | |
1931 | ||
1932 | if (*argrest == 0) {} | |
1933 | ||
1934 | /* -bpu: List the contents of the mail queue, top-level undelivered */ | |
1935 | ||
1936 | else if (Ustrcmp(argrest, "u") == 0) list_queue_option += 1; | |
1937 | ||
1938 | /* -bpa: List the contents of the mail queue, including all delivered */ | |
1939 | ||
1940 | else if (Ustrcmp(argrest, "a") == 0) list_queue_option += 2; | |
1941 | ||
1942 | /* Unknown after -bp[r] */ | |
1943 | ||
1944 | else | |
1945 | { | |
1946 | badarg = TRUE; | |
1947 | break; | |
1948 | } | |
1949 | } | |
1950 | ||
1951 | ||
1952 | /* -bP: List the configuration variables given as the address list. | |
1953 | Force -v, so configuration errors get displayed. */ | |
1954 | ||
1955 | else if (Ustrcmp(argrest, "P") == 0) | |
1956 | { | |
1957 | list_options = TRUE; | |
1958 | debug_selector |= D_v; | |
1959 | debug_file = stderr; | |
1960 | } | |
1961 | ||
1962 | /* -brt: Test retry configuration lookup */ | |
1963 | ||
1964 | else if (Ustrcmp(argrest, "rt") == 0) | |
1965 | { | |
1966 | test_retry_arg = i + 1; | |
1967 | goto END_ARG; | |
1968 | } | |
1969 | ||
1970 | /* -brw: Test rewrite configuration */ | |
1971 | ||
1972 | else if (Ustrcmp(argrest, "rw") == 0) | |
1973 | { | |
1974 | test_rewrite_arg = i + 1; | |
1975 | goto END_ARG; | |
1976 | } | |
1977 | ||
1978 | /* -bS: Read SMTP commands on standard input, but produce no replies - | |
1979 | all errors are reported by sending messages. */ | |
1980 | ||
1981 | else if (Ustrcmp(argrest, "S") == 0) | |
1982 | smtp_input = smtp_batched_input = receiving_message = TRUE; | |
1983 | ||
1984 | /* -bs: Read SMTP commands on standard input and produce SMTP replies | |
1985 | on standard output. */ | |
1986 | ||
1987 | else if (Ustrcmp(argrest, "s") == 0) smtp_input = receiving_message = TRUE; | |
1988 | ||
1989 | /* -bt: address testing mode */ | |
1990 | ||
1991 | else if (Ustrcmp(argrest, "t") == 0) | |
1992 | address_test_mode = checking = log_testing_mode = TRUE; | |
1993 | ||
1994 | /* -bv: verify addresses */ | |
1995 | ||
1996 | else if (Ustrcmp(argrest, "v") == 0) | |
1997 | verify_address_mode = checking = log_testing_mode = TRUE; | |
1998 | ||
1999 | /* -bvs: verify sender addresses */ | |
2000 | ||
2001 | else if (Ustrcmp(argrest, "vs") == 0) | |
2002 | { | |
2003 | verify_address_mode = checking = log_testing_mode = TRUE; | |
2004 | verify_as_sender = TRUE; | |
2005 | } | |
2006 | ||
2007 | /* -bV: Print version string and support details */ | |
2008 | ||
2009 | else if (Ustrcmp(argrest, "V") == 0) | |
2010 | { | |
2011 | printf("Exim version %s #%s built %s\n", version_string, | |
2012 | version_cnumber, version_date); | |
2013 | printf("%s\n", CS version_copyright); | |
2014 | version_printed = TRUE; | |
2015 | show_whats_supported(stdout); | |
2016 | } | |
2017 | ||
2018 | else badarg = TRUE; | |
2019 | break; | |
2020 | ||
2021 | ||
2022 | /* -C: change configuration file list; ignore if it isn't really | |
2023 | a change! Enforce a prefix check if required. */ | |
2024 | ||
2025 | case 'C': | |
2026 | if (*argrest == 0) | |
2027 | { | |
2028 | if(++i < argc) argrest = argv[i]; else | |
2029 | { badarg = TRUE; break; } | |
2030 | } | |
2031 | if (Ustrcmp(config_main_filelist, argrest) != 0) | |
2032 | { | |
2033 | #ifdef ALT_CONFIG_PREFIX | |
2034 | int sep = 0; | |
2035 | int len = Ustrlen(ALT_CONFIG_PREFIX); | |
2036 | uschar *list = argrest; | |
2037 | uschar *filename; | |
2038 | while((filename = string_nextinlist(&list, &sep, big_buffer, | |
2039 | big_buffer_size)) != NULL) | |
2040 | { | |
2041 | if ((Ustrlen(filename) < len || | |
2042 | Ustrncmp(filename, ALT_CONFIG_PREFIX, len) != 0 || | |
2043 | Ustrstr(filename, "/../") != NULL) && | |
2044 | (Ustrcmp(filename, "/dev/null") != 0 || real_uid != root_uid)) | |
2045 | { | |
2046 | fprintf(stderr, "-C Permission denied\n"); | |
2047 | exit(EXIT_FAILURE); | |
2048 | } | |
2049 | } | |
2050 | #endif | |
261dc43e DW |
2051 | if (real_uid != root_uid) |
2052 | { | |
90b6341f | 2053 | #ifdef TRUSTED_CONFIG_LIST |
261dc43e | 2054 | |
90b6341f DW |
2055 | if (real_uid != exim_uid |
2056 | #ifdef CONFIGURE_OWNER | |
2057 | && real_uid != config_uid | |
2058 | #endif | |
2059 | ) | |
261dc43e DW |
2060 | trusted_config = FALSE; |
2061 | else | |
2062 | { | |
90b6341f | 2063 | FILE *trust_list = Ufopen(TRUSTED_CONFIG_LIST, "rb"); |
261dc43e DW |
2064 | if (trust_list) |
2065 | { | |
2066 | struct stat statbuf; | |
2067 | ||
2068 | if (fstat(fileno(trust_list), &statbuf) != 0 || | |
2069 | (statbuf.st_uid != root_uid /* owner not root */ | |
2070 | #ifdef CONFIGURE_OWNER | |
2071 | && statbuf.st_uid != config_uid /* owner not the special one */ | |
2072 | #endif | |
2073 | ) || /* or */ | |
2074 | (statbuf.st_gid != root_gid /* group not root */ | |
2075 | #ifdef CONFIGURE_GROUP | |
2076 | && statbuf.st_gid != config_gid /* group not the special one */ | |
2077 | #endif | |
2078 | && (statbuf.st_mode & 020) != 0 /* group writeable */ | |
2079 | ) || /* or */ | |
2080 | (statbuf.st_mode & 2) != 0) /* world writeable */ | |
2081 | { | |
2082 | trusted_config = FALSE; | |
2083 | fclose(trust_list); | |
2084 | } | |
2085 | else | |
2086 | { | |
2087 | /* Well, the trust list at least is up to scratch... */ | |
2088 | void *reset_point = store_get(0); | |
90b6341f DW |
2089 | uschar *trusted_configs[32]; |
2090 | int nr_configs = 0; | |
261dc43e DW |
2091 | int i = 0; |
2092 | ||
2093 | while (Ufgets(big_buffer, big_buffer_size, trust_list)) | |
2094 | { | |
2095 | uschar *start = big_buffer, *nl; | |
2096 | while (*start && isspace(*start)) | |
2097 | start++; | |
1e83d68b | 2098 | if (*start != '/') |
261dc43e DW |
2099 | continue; |
2100 | nl = Ustrchr(start, '\n'); | |
2101 | if (nl) | |
2102 | *nl = 0; | |
90b6341f DW |
2103 | trusted_configs[nr_configs++] = string_copy(start); |
2104 | if (nr_configs == 32) | |
261dc43e DW |
2105 | break; |
2106 | } | |
2107 | fclose(trust_list); | |
2108 | ||
90b6341f | 2109 | if (nr_configs) |
261dc43e DW |
2110 | { |
2111 | int sep = 0; | |
2112 | uschar *list = argrest; | |
2113 | uschar *filename; | |
2114 | while (trusted_config && (filename = string_nextinlist(&list, | |
2115 | &sep, big_buffer, big_buffer_size)) != NULL) | |
2116 | { | |
90b6341f | 2117 | for (i=0; i < nr_configs; i++) |
261dc43e | 2118 | { |
90b6341f | 2119 | if (Ustrcmp(filename, trusted_configs[i]) == 0) |
261dc43e DW |
2120 | break; |
2121 | } | |
90b6341f | 2122 | if (i == nr_configs) |
261dc43e DW |
2123 | { |
2124 | trusted_config = FALSE; | |
2125 | break; | |
2126 | } | |
2127 | } | |
1e83d68b | 2128 | store_reset(reset_point); |
261dc43e DW |
2129 | } |
2130 | else | |
2131 | { | |
2132 | /* No valid prefixes found in trust_list file. */ | |
2133 | trusted_config = FALSE; | |
2134 | } | |
2135 | } | |
2136 | } | |
2137 | else | |
2138 | { | |
2139 | /* Could not open trust_list file. */ | |
2140 | trusted_config = FALSE; | |
2141 | } | |
2142 | } | |
2143 | #else | |
2144 | /* Not root; don't trust config */ | |
2145 | trusted_config = FALSE; | |
2146 | #endif | |
2147 | } | |
059ec3d9 PH |
2148 | |
2149 | config_main_filelist = argrest; | |
2150 | config_changed = TRUE; | |
2151 | } | |
2152 | break; | |
2153 | ||
2154 | ||
2155 | /* -D: set up a macro definition */ | |
2156 | ||
2157 | case 'D': | |
2158 | #ifdef DISABLE_D_OPTION | |
2159 | fprintf(stderr, "exim: -D is not available in this Exim binary\n"); | |
2160 | exit(EXIT_FAILURE); | |
2161 | #else | |
2162 | { | |
2163 | int ptr = 0; | |
2164 | macro_item *mlast = NULL; | |
2165 | macro_item *m; | |
2166 | uschar name[24]; | |
2167 | uschar *s = argrest; | |
2168 | ||
2169 | while (isspace(*s)) s++; | |
2170 | ||
2171 | if (*s < 'A' || *s > 'Z') | |
2172 | { | |
2173 | fprintf(stderr, "exim: macro name set by -D must start with " | |
2174 | "an upper case letter\n"); | |
2175 | exit(EXIT_FAILURE); | |
2176 | } | |
2177 | ||
2178 | while (isalnum(*s) || *s == '_') | |
2179 | { | |
2180 | if (ptr < sizeof(name)-1) name[ptr++] = *s; | |
2181 | s++; | |
2182 | } | |
2183 | name[ptr] = 0; | |
2184 | if (ptr == 0) { badarg = TRUE; break; } | |
2185 | while (isspace(*s)) s++; | |
2186 | if (*s != 0) | |
2187 | { | |
2188 | if (*s++ != '=') { badarg = TRUE; break; } | |
2189 | while (isspace(*s)) s++; | |
2190 | } | |
2191 | ||
2192 | for (m = macros; m != NULL; m = m->next) | |
2193 | { | |
2194 | if (Ustrcmp(m->name, name) == 0) | |
2195 | { | |
2196 | fprintf(stderr, "exim: duplicated -D in command line\n"); | |
2197 | exit(EXIT_FAILURE); | |
2198 | } | |
2199 | mlast = m; | |
2200 | } | |
2201 | ||
2202 | m = store_get(sizeof(macro_item) + Ustrlen(name)); | |
2203 | m->next = NULL; | |
2204 | m->command_line = TRUE; | |
2205 | if (mlast == NULL) macros = m; else mlast->next = m; | |
2206 | Ustrcpy(m->name, name); | |
2207 | m->replacement = string_copy(s); | |
2208 | ||
2209 | if (clmacro_count >= MAX_CLMACROS) | |
2210 | { | |
2211 | fprintf(stderr, "exim: too many -D options on command line\n"); | |
2212 | exit(EXIT_FAILURE); | |
2213 | } | |
2214 | clmacros[clmacro_count++] = string_sprintf("-D%s=%s", m->name, | |
2215 | m->replacement); | |
2216 | } | |
2217 | #endif | |
2218 | break; | |
2219 | ||
2220 | /* -d: Set debug level (see also -v below) or set the drop_cr option. | |
8e669ac1 | 2221 | The latter is now a no-op, retained for compatibility only. If -dd is used, |
3d235903 | 2222 | debugging subprocesses of the daemon is disabled. */ |
059ec3d9 PH |
2223 | |
2224 | case 'd': | |
2225 | if (Ustrcmp(argrest, "ropcr") == 0) | |
2226 | { | |
2227 | /* drop_cr = TRUE; */ | |
2228 | } | |
2229 | ||
2230 | /* Use an intermediate variable so that we don't set debugging while | |
2231 | decoding the debugging bits. */ | |
2232 | ||
2233 | else | |
2234 | { | |
2235 | unsigned int selector = D_default; | |
2236 | debug_selector = 0; | |
2237 | debug_file = NULL; | |
3d235903 PH |
2238 | if (*argrest == 'd') |
2239 | { | |
2240 | debug_daemon = TRUE; | |
2241 | argrest++; | |
2242 | } | |
059ec3d9 | 2243 | if (*argrest != 0) |
1fe64dcc | 2244 | decode_bits(&selector, NULL, D_memory, 0, argrest, debug_options, |
ed7f7860 | 2245 | debug_options_count, US"debug", 0); |
059ec3d9 PH |
2246 | debug_selector = selector; |
2247 | } | |
2248 | break; | |
2249 | ||
2250 | ||
2251 | /* -E: This is a local error message. This option is not intended for | |
2252 | external use at all, but is not restricted to trusted callers because it | |
2253 | does no harm (just suppresses certain error messages) and if Exim is run | |
2254 | not setuid root it won't always be trusted when it generates error | |
2255 | messages using this option. If there is a message id following -E, point | |
2256 | message_reference at it, for logging. */ | |
2257 | ||
2258 | case 'E': | |
2259 | local_error_message = TRUE; | |
2260 | if (mac_ismsgid(argrest)) message_reference = argrest; | |
2261 | break; | |
2262 | ||
2263 | ||
2264 | /* -ex: The vacation program calls sendmail with the undocumented "-eq" | |
2265 | option, so it looks as if historically the -oex options are also callable | |
2266 | without the leading -o. So we have to accept them. Before the switch, | |
2267 | anything starting -oe has been converted to -e. Exim does not support all | |
2268 | of the sendmail error options. */ | |
2269 | ||
2270 | case 'e': | |
2271 | if (Ustrcmp(argrest, "e") == 0) | |
2272 | { | |
2273 | arg_error_handling = ERRORS_SENDER; | |
2274 | errors_sender_rc = EXIT_SUCCESS; | |
2275 | } | |
2276 | else if (Ustrcmp(argrest, "m") == 0) arg_error_handling = ERRORS_SENDER; | |
2277 | else if (Ustrcmp(argrest, "p") == 0) arg_error_handling = ERRORS_STDERR; | |
2278 | else if (Ustrcmp(argrest, "q") == 0) arg_error_handling = ERRORS_STDERR; | |
2279 | else if (Ustrcmp(argrest, "w") == 0) arg_error_handling = ERRORS_SENDER; | |
2280 | else badarg = TRUE; | |
2281 | break; | |
2282 | ||
2283 | ||
2284 | /* -F: Set sender's full name, used instead of the gecos entry from | |
2285 | the password file. Since users can usually alter their gecos entries, | |
2286 | there's no security involved in using this instead. The data can follow | |
2287 | the -F or be in the next argument. */ | |
2288 | ||
2289 | case 'F': | |
2290 | if (*argrest == 0) | |
2291 | { | |
2292 | if(++i < argc) argrest = argv[i]; else | |
2293 | { badarg = TRUE; break; } | |
2294 | } | |
2295 | originator_name = argrest; | |
2fe1a124 | 2296 | sender_name_forced = TRUE; |
059ec3d9 PH |
2297 | break; |
2298 | ||
2299 | ||
2300 | /* -f: Set sender's address - this value is only actually used if Exim is | |
2301 | run by a trusted user, or if untrusted_set_sender is set and matches the | |
2302 | address, except that the null address can always be set by any user. The | |
2303 | test for this happens later, when the value given here is ignored when not | |
2304 | permitted. For an untrusted user, the actual sender is still put in Sender: | |
2305 | if it doesn't match the From: header (unless no_local_from_check is set). | |
2306 | The data can follow the -f or be in the next argument. The -r switch is an | |
2307 | obsolete form of -f but since there appear to be programs out there that | |
2308 | use anything that sendmail has ever supported, better accept it - the | |
2309 | synonymizing is done before the switch above. | |
2310 | ||
2311 | At this stage, we must allow domain literal addresses, because we don't | |
2312 | know what the setting of allow_domain_literals is yet. Ditto for trailing | |
2313 | dots and strip_trailing_dot. */ | |
2314 | ||
2315 | case 'f': | |
2316 | { | |
2317 | int start, end; | |
2318 | uschar *errmess; | |
2319 | if (*argrest == 0) | |
2320 | { | |
2321 | if (i+1 < argc) argrest = argv[++i]; else | |
2322 | { badarg = TRUE; break; } | |
2323 | } | |
2324 | if (*argrest == 0) | |
2325 | { | |
2326 | sender_address = string_sprintf(""); /* Ensure writeable memory */ | |
2327 | } | |
2328 | else | |
2329 | { | |
2330 | uschar *temp = argrest + Ustrlen(argrest) - 1; | |
2331 | while (temp >= argrest && isspace(*temp)) temp--; | |
2332 | if (temp >= argrest && *temp == '.') f_end_dot = TRUE; | |
2333 | allow_domain_literals = TRUE; | |
2334 | strip_trailing_dot = TRUE; | |
2335 | sender_address = parse_extract_address(argrest, &errmess, &start, &end, | |
2336 | &sender_address_domain, TRUE); | |
2337 | allow_domain_literals = FALSE; | |
2338 | strip_trailing_dot = FALSE; | |
2339 | if (sender_address == NULL) | |
2340 | { | |
2341 | fprintf(stderr, "exim: bad -f address \"%s\": %s\n", argrest, errmess); | |
2342 | return EXIT_FAILURE; | |
2343 | } | |
2344 | } | |
2345 | sender_address_forced = TRUE; | |
2346 | } | |
2347 | break; | |
2348 | ||
2349 | /* This is some Sendmail thing which can be ignored */ | |
2350 | ||
2351 | case 'G': | |
2352 | break; | |
2353 | ||
2354 | /* -h: Set the hop count for an incoming message. Exim does not currently | |
2355 | support this; it always computes it by counting the Received: headers. | |
2356 | To put it in will require a change to the spool header file format. */ | |
2357 | ||
2358 | case 'h': | |
2359 | if (*argrest == 0) | |
2360 | { | |
2361 | if(++i < argc) argrest = argv[i]; else | |
2362 | { badarg = TRUE; break; } | |
2363 | } | |
2364 | if (!isdigit(*argrest)) badarg = TRUE; | |
2365 | break; | |
2366 | ||
2367 | ||
2368 | /* -i: Set flag so dot doesn't end non-SMTP input (same as -oi, seems | |
2369 | not to be documented for sendmail but mailx (at least) uses it) */ | |
2370 | ||
2371 | case 'i': | |
2372 | if (*argrest == 0) dot_ends = FALSE; else badarg = TRUE; | |
2373 | break; | |
2374 | ||
2375 | ||
2376 | case 'M': | |
2377 | receiving_message = FALSE; | |
2378 | ||
2379 | /* -MC: continue delivery of another message via an existing open | |
2380 | file descriptor. This option is used for an internal call by the | |
2381 | smtp transport when there is a pending message waiting to go to an | |
2382 | address to which it has got a connection. Five subsequent arguments are | |
2383 | required: transport name, host name, IP address, sequence number, and | |
2384 | message_id. Transports may decline to create new processes if the sequence | |
2385 | number gets too big. The channel is stdin. This (-MC) must be the last | |
2386 | argument. There's a subsequent check that the real-uid is privileged. | |
2387 | ||
2388 | If we are running in the test harness. delay for a bit, to let the process | |
2389 | that set this one up complete. This makes for repeatability of the logging, | |
2390 | etc. output. */ | |
2391 | ||
2392 | if (Ustrcmp(argrest, "C") == 0) | |
2393 | { | |
41c7c167 PH |
2394 | union sockaddr_46 interface_sock; |
2395 | EXIM_SOCKLEN_T size = sizeof(interface_sock); | |
2396 | ||
059ec3d9 PH |
2397 | if (argc != i + 6) |
2398 | { | |
2399 | fprintf(stderr, "exim: too many or too few arguments after -MC\n"); | |
2400 | return EXIT_FAILURE; | |
2401 | } | |
2402 | ||
2403 | if (msg_action_arg >= 0) | |
2404 | { | |
2405 | fprintf(stderr, "exim: incompatible arguments\n"); | |
2406 | return EXIT_FAILURE; | |
2407 | } | |
2408 | ||
2409 | continue_transport = argv[++i]; | |
2410 | continue_hostname = argv[++i]; | |
2411 | continue_host_address = argv[++i]; | |
2412 | continue_sequence = Uatoi(argv[++i]); | |
2413 | msg_action = MSG_DELIVER; | |
2414 | msg_action_arg = ++i; | |
2415 | forced_delivery = TRUE; | |
2416 | queue_run_pid = passed_qr_pid; | |
2417 | queue_run_pipe = passed_qr_pipe; | |
2418 | ||
2419 | if (!mac_ismsgid(argv[i])) | |
2420 | { | |
2421 | fprintf(stderr, "exim: malformed message id %s after -MC option\n", | |
2422 | argv[i]); | |
2423 | return EXIT_FAILURE; | |
2424 | } | |
2425 | ||
41c7c167 PH |
2426 | /* Set up $sending_ip_address and $sending_port */ |
2427 | ||
2428 | if (getsockname(fileno(stdin), (struct sockaddr *)(&interface_sock), | |
2429 | &size) == 0) | |
2430 | sending_ip_address = host_ntoa(-1, &interface_sock, NULL, | |
2431 | &sending_port); | |
2432 | else | |
2433 | { | |
2434 | fprintf(stderr, "exim: getsockname() failed after -MC option: %s\n", | |
2435 | strerror(errno)); | |
2436 | return EXIT_FAILURE; | |
2437 | } | |
2438 | ||
059ec3d9 PH |
2439 | if (running_in_test_harness) millisleep(500); |
2440 | break; | |
2441 | } | |
2442 | ||
2443 | /* -MCA: set the smtp_authenticated flag; this is useful only when it | |
2444 | precedes -MC (see above). The flag indicates that the host to which | |
2445 | Exim is connected has accepted an AUTH sequence. */ | |
2446 | ||
2447 | else if (Ustrcmp(argrest, "CA") == 0) | |
2448 | { | |
2449 | smtp_authenticated = TRUE; | |
2450 | break; | |
2451 | } | |
2452 | ||
2453 | /* -MCP: set the smtp_use_pipelining flag; this is useful only when | |
2454 | it preceded -MC (see above) */ | |
2455 | ||
2456 | else if (Ustrcmp(argrest, "CP") == 0) | |
2457 | { | |
2458 | smtp_use_pipelining = TRUE; | |
2459 | break; | |
2460 | } | |
2461 | ||
2462 | /* -MCQ: pass on the pid of the queue-running process that started | |
2463 | this chain of deliveries and the fd of its synchronizing pipe; this | |
2464 | is useful only when it precedes -MC (see above) */ | |
2465 | ||
2466 | else if (Ustrcmp(argrest, "CQ") == 0) | |
2467 | { | |
2468 | if(++i < argc) passed_qr_pid = (pid_t)(Uatol(argv[i])); | |
2469 | else badarg = TRUE; | |
2470 | if(++i < argc) passed_qr_pipe = (int)(Uatol(argv[i])); | |
2471 | else badarg = TRUE; | |
2472 | break; | |
2473 | } | |
2474 | ||
2475 | /* -MCS: set the smtp_use_size flag; this is useful only when it | |
2476 | precedes -MC (see above) */ | |
2477 | ||
2478 | else if (Ustrcmp(argrest, "CS") == 0) | |
2479 | { | |
2480 | smtp_use_size = TRUE; | |
2481 | break; | |
2482 | } | |
2483 | ||
2484 | /* -MCT: set the tls_offered flag; this is useful only when it | |
2485 | precedes -MC (see above). The flag indicates that the host to which | |
2486 | Exim is connected has offered TLS support. */ | |
2487 | ||
2488 | #ifdef SUPPORT_TLS | |
2489 | else if (Ustrcmp(argrest, "CT") == 0) | |
2490 | { | |
2491 | tls_offered = TRUE; | |
2492 | break; | |
2493 | } | |
2494 | #endif | |
2495 | ||
2496 | /* -M[x]: various operations on the following list of message ids: | |
2497 | -M deliver the messages, ignoring next retry times and thawing | |
2498 | -Mc deliver the messages, checking next retry times, no thawing | |
2499 | -Mf freeze the messages | |
2500 | -Mg give up on the messages | |
2501 | -Mt thaw the messages | |
2502 | -Mrm remove the messages | |
2503 | In the above cases, this must be the last option. There are also the | |
2504 | following options which are followed by a single message id, and which | |
2505 | act on that message. Some of them use the "recipient" addresses as well. | |
2506 | -Mar add recipient(s) | |
2507 | -Mmad mark all recipients delivered | |
2508 | -Mmd mark recipients(s) delivered | |
2509 | -Mes edit sender | |
0ef732d9 | 2510 | -Mset load a message for use with -be |
059ec3d9 | 2511 | -Mvb show body |
a96603a0 | 2512 | -Mvc show copy (of whole message, in RFC 2822 format) |
059ec3d9 PH |
2513 | -Mvh show header |
2514 | -Mvl show log | |
2515 | */ | |
2516 | ||
2517 | else if (*argrest == 0) | |
2518 | { | |
2519 | msg_action = MSG_DELIVER; | |
2520 | forced_delivery = deliver_force_thaw = TRUE; | |
2521 | } | |
2522 | else if (Ustrcmp(argrest, "ar") == 0) | |
2523 | { | |
2524 | msg_action = MSG_ADD_RECIPIENT; | |
2525 | one_msg_action = TRUE; | |
2526 | } | |
2527 | else if (Ustrcmp(argrest, "c") == 0) msg_action = MSG_DELIVER; | |
2528 | else if (Ustrcmp(argrest, "es") == 0) | |
2529 | { | |
2530 | msg_action = MSG_EDIT_SENDER; | |
2531 | one_msg_action = TRUE; | |
2532 | } | |
2533 | else if (Ustrcmp(argrest, "f") == 0) msg_action = MSG_FREEZE; | |
2534 | else if (Ustrcmp(argrest, "g") == 0) | |
2535 | { | |
2536 | msg_action = MSG_DELIVER; | |
2537 | deliver_give_up = TRUE; | |
2538 | } | |
2539 | else if (Ustrcmp(argrest, "mad") == 0) | |
2540 | { | |
2541 | msg_action = MSG_MARK_ALL_DELIVERED; | |
2542 | } | |
2543 | else if (Ustrcmp(argrest, "md") == 0) | |
2544 | { | |
2545 | msg_action = MSG_MARK_DELIVERED; | |
2546 | one_msg_action = TRUE; | |
2547 | } | |
2548 | else if (Ustrcmp(argrest, "rm") == 0) msg_action = MSG_REMOVE; | |
0ef732d9 PH |
2549 | else if (Ustrcmp(argrest, "set") == 0) |
2550 | { | |
2551 | msg_action = MSG_LOAD; | |
2552 | one_msg_action = TRUE; | |
2553 | } | |
059ec3d9 PH |
2554 | else if (Ustrcmp(argrest, "t") == 0) msg_action = MSG_THAW; |
2555 | else if (Ustrcmp(argrest, "vb") == 0) | |
2556 | { | |
2557 | msg_action = MSG_SHOW_BODY; | |
2558 | one_msg_action = TRUE; | |
2559 | } | |
a96603a0 PH |
2560 | else if (Ustrcmp(argrest, "vc") == 0) |
2561 | { | |
2562 | msg_action = MSG_SHOW_COPY; | |
2563 | one_msg_action = TRUE; | |
2564 | } | |
059ec3d9 PH |
2565 | else if (Ustrcmp(argrest, "vh") == 0) |
2566 | { | |
2567 | msg_action = MSG_SHOW_HEADER; | |
2568 | one_msg_action = TRUE; | |
2569 | } | |
2570 | else if (Ustrcmp(argrest, "vl") == 0) | |
2571 | { | |
2572 | msg_action = MSG_SHOW_LOG; | |
2573 | one_msg_action = TRUE; | |
2574 | } | |
2575 | else { badarg = TRUE; break; } | |
2576 | ||
2577 | /* All the -Mxx options require at least one message id. */ | |
2578 | ||
2579 | msg_action_arg = i + 1; | |
2580 | if (msg_action_arg >= argc) | |
2581 | { | |
2582 | fprintf(stderr, "exim: no message ids given after %s option\n", arg); | |
2583 | return EXIT_FAILURE; | |
2584 | } | |
2585 | ||
2586 | /* Some require only message ids to follow */ | |
2587 | ||
2588 | if (!one_msg_action) | |
2589 | { | |
2590 | int j; | |
2591 | for (j = msg_action_arg; j < argc; j++) if (!mac_ismsgid(argv[j])) | |
2592 | { | |
2593 | fprintf(stderr, "exim: malformed message id %s after %s option\n", | |
2594 | argv[j], arg); | |
2595 | return EXIT_FAILURE; | |
2596 | } | |
2597 | goto END_ARG; /* Remaining args are ids */ | |
2598 | } | |
2599 | ||
2600 | /* Others require only one message id, possibly followed by addresses, | |
2601 | which will be handled as normal arguments. */ | |
2602 | ||
2603 | else | |
2604 | { | |
2605 | if (!mac_ismsgid(argv[msg_action_arg])) | |
2606 | { | |
2607 | fprintf(stderr, "exim: malformed message id %s after %s option\n", | |
2608 | argv[msg_action_arg], arg); | |
2609 | return EXIT_FAILURE; | |
2610 | } | |
2611 | i++; | |
2612 | } | |
2613 | break; | |
2614 | ||
2615 | ||
2616 | /* Some programs seem to call the -om option without the leading o; | |
2617 | for sendmail it askes for "me too". Exim always does this. */ | |
2618 | ||
2619 | case 'm': | |
2620 | if (*argrest != 0) badarg = TRUE; | |
2621 | break; | |
2622 | ||
2623 | ||
2624 | /* -N: don't do delivery - a debugging option that stops transports doing | |
2625 | their thing. It implies debugging at the D_v level. */ | |
2626 | ||
2627 | case 'N': | |
2628 | if (*argrest == 0) | |
2629 | { | |
2630 | dont_deliver = TRUE; | |
2631 | debug_selector |= D_v; | |
2632 | debug_file = stderr; | |
2633 | } | |
2634 | else badarg = TRUE; | |
2635 | break; | |
2636 | ||
2637 | ||
2638 | /* -n: This means "don't alias" in sendmail, apparently. Just ignore | |
2639 | it. */ | |
2640 | ||
2641 | case 'n': | |
2642 | break; | |
2643 | ||
2644 | /* -O: Just ignore it. In sendmail, apparently -O option=value means set | |
2645 | option to the specified value. This form uses long names. We need to handle | |
2646 | -O option=value and -Ooption=value. */ | |
2647 | ||
2648 | case 'O': | |
2649 | if (*argrest == 0) | |
2650 | { | |
2651 | if (++i >= argc) | |
2652 | { | |
2653 | fprintf(stderr, "exim: string expected after -O\n"); | |
2654 | exit(EXIT_FAILURE); | |
2655 | } | |
2656 | } | |
2657 | break; | |
2658 | ||
2659 | case 'o': | |
2660 | ||
2661 | /* -oA: Set an argument for the bi command (sendmail's "alternate alias | |
2662 | file" option). */ | |
2663 | ||
2664 | if (*argrest == 'A') | |
2665 | { | |
2666 | alias_arg = argrest + 1; | |
2667 | if (alias_arg[0] == 0) | |
2668 | { | |
2669 | if (i+1 < argc) alias_arg = argv[++i]; else | |
2670 | { | |
2671 | fprintf(stderr, "exim: string expected after -oA\n"); | |
2672 | exit(EXIT_FAILURE); | |
2673 | } | |
2674 | } | |
2675 | } | |
2676 | ||
2677 | /* -oB: Set a connection message max value for remote deliveries */ | |
2678 | ||
2679 | else if (*argrest == 'B') | |
2680 | { | |
2681 | uschar *p = argrest + 1; | |
2682 | if (p[0] == 0) | |
2683 | { | |
2684 | if (i+1 < argc && isdigit((argv[i+1][0]))) p = argv[++i]; else | |
2685 | { | |
2686 | connection_max_messages = 1; | |
2687 | p = NULL; | |
2688 | } | |
2689 | } | |
2690 | ||
2691 | if (p != NULL) | |
2692 | { | |
2693 | if (!isdigit(*p)) | |
2694 | { | |
2695 | fprintf(stderr, "exim: number expected after -oB\n"); | |
2696 | exit(EXIT_FAILURE); | |
2697 | } | |
2698 | connection_max_messages = Uatoi(p); | |
2699 | } | |
2700 | } | |
2701 | ||
2702 | /* -odb: background delivery */ | |
2703 | ||
2704 | else if (Ustrcmp(argrest, "db") == 0) | |
2705 | { | |
2706 | synchronous_delivery = FALSE; | |
2707 | arg_queue_only = FALSE; | |
2708 | queue_only_set = TRUE; | |
2709 | } | |
2710 | ||
2711 | /* -odf: foreground delivery (smail-compatible option); same effect as | |
2712 | -odi: interactive (synchronous) delivery (sendmail-compatible option) | |
2713 | */ | |
2714 | ||
2715 | else if (Ustrcmp(argrest, "df") == 0 || Ustrcmp(argrest, "di") == 0) | |
2716 | { | |
2717 | synchronous_delivery = TRUE; | |
2718 | arg_queue_only = FALSE; | |
2719 | queue_only_set = TRUE; | |
2720 | } | |
2721 | ||
2722 | /* -odq: queue only */ | |
2723 | ||
2724 | else if (Ustrcmp(argrest, "dq") == 0) | |
2725 | { | |
2726 | synchronous_delivery = FALSE; | |
2727 | arg_queue_only = TRUE; | |
2728 | queue_only_set = TRUE; | |
2729 | } | |
2730 | ||
2731 | /* -odqs: queue SMTP only - do local deliveries and remote routing, | |
2732 | but no remote delivery */ | |
2733 | ||
2734 | else if (Ustrcmp(argrest, "dqs") == 0) | |
2735 | { | |
2736 | queue_smtp = TRUE; | |
2737 | arg_queue_only = FALSE; | |
2738 | queue_only_set = TRUE; | |
2739 | } | |
2740 | ||
2741 | /* -oex: Sendmail error flags. As these are also accepted without the | |
2742 | leading -o prefix, for compatibility with vacation and other callers, | |
2743 | they are handled with -e above. */ | |
2744 | ||
2745 | /* -oi: Set flag so dot doesn't end non-SMTP input (same as -i) | |
2746 | -oitrue: Another sendmail syntax for the same */ | |
2747 | ||
2748 | else if (Ustrcmp(argrest, "i") == 0 || | |
2749 | Ustrcmp(argrest, "itrue") == 0) | |
2750 | dot_ends = FALSE; | |
2751 | ||
2752 | /* -oM*: Set various characteristics for an incoming message; actually | |
2753 | acted on for trusted callers only. */ | |
2754 | ||
2755 | else if (*argrest == 'M') | |
2756 | { | |
2757 | if (i+1 >= argc) | |
2758 | { | |
2759 | fprintf(stderr, "exim: data expected after -o%s\n", argrest); | |
2760 | exit(EXIT_FAILURE); | |
2761 | } | |
2762 | ||
2763 | /* -oMa: Set sender host address */ | |
2764 | ||
2765 | if (Ustrcmp(argrest, "Ma") == 0) sender_host_address = argv[++i]; | |
2766 | ||
2767 | /* -oMaa: Set authenticator name */ | |
2768 | ||
2769 | else if (Ustrcmp(argrest, "Maa") == 0) | |
2770 | sender_host_authenticated = argv[++i]; | |
2771 | ||
2772 | /* -oMas: setting authenticated sender */ | |
2773 | ||
2774 | else if (Ustrcmp(argrest, "Mas") == 0) authenticated_sender = argv[++i]; | |
2775 | ||
2776 | /* -oMai: setting authenticated id */ | |
2777 | ||
2778 | else if (Ustrcmp(argrest, "Mai") == 0) authenticated_id = argv[++i]; | |
2779 | ||
2780 | /* -oMi: Set incoming interface address */ | |
2781 | ||
2782 | else if (Ustrcmp(argrest, "Mi") == 0) interface_address = argv[++i]; | |
2783 | ||
2784 | /* -oMr: Received protocol */ | |
2785 | ||
2786 | else if (Ustrcmp(argrest, "Mr") == 0) received_protocol = argv[++i]; | |
2787 | ||
2788 | /* -oMs: Set sender host name */ | |
2789 | ||
2790 | else if (Ustrcmp(argrest, "Ms") == 0) sender_host_name = argv[++i]; | |
2791 | ||
2792 | /* -oMt: Set sender ident */ | |
2793 | ||
33d73e3b PH |
2794 | else if (Ustrcmp(argrest, "Mt") == 0) |
2795 | { | |
2796 | sender_ident_set = TRUE; | |
2797 | sender_ident = argv[++i]; | |
2798 | } | |
059ec3d9 PH |
2799 | |
2800 | /* Else a bad argument */ | |
2801 | ||
2802 | else | |
2803 | { | |
2804 | badarg = TRUE; | |
2805 | break; | |
2806 | } | |
2807 | } | |
2808 | ||
2809 | /* -om: Me-too flag for aliases. Exim always does this. Some programs | |
2810 | seem to call this as -m (undocumented), so that is also accepted (see | |
2811 | above). */ | |
2812 | ||
2813 | else if (Ustrcmp(argrest, "m") == 0) {} | |
2814 | ||
2815 | /* -oo: An ancient flag for old-style addresses which still seems to | |
2816 | crop up in some calls (see in SCO). */ | |
2817 | ||
2818 | else if (Ustrcmp(argrest, "o") == 0) {} | |
2819 | ||
2820 | /* -oP <name>: set pid file path for daemon */ | |
2821 | ||
2822 | else if (Ustrcmp(argrest, "P") == 0) | |
2823 | override_pid_file_path = argv[++i]; | |
2824 | ||
2825 | /* -or <n>: set timeout for non-SMTP acceptance | |
2826 | -os <n>: set timeout for SMTP acceptance */ | |
2827 | ||
2828 | else if (*argrest == 'r' || *argrest == 's') | |
2829 | { | |
2830 | int *tp = (*argrest == 'r')? | |
2831 | &arg_receive_timeout : &arg_smtp_receive_timeout; | |
2832 | if (argrest[1] == 0) | |
2833 | { | |
2834 | if (i+1 < argc) *tp= readconf_readtime(argv[++i], 0, FALSE); | |
2835 | } | |
2836 | else *tp = readconf_readtime(argrest + 1, 0, FALSE); | |
2837 | if (*tp < 0) | |
2838 | { | |
2839 | fprintf(stderr, "exim: bad time value %s: abandoned\n", argv[i]); | |
2840 | exit(EXIT_FAILURE); | |
2841 | } | |
2842 | } | |
2843 | ||
2844 | /* -oX <list>: Override local_interfaces and/or default daemon ports */ | |
2845 | ||
2846 | else if (Ustrcmp(argrest, "X") == 0) | |
2847 | override_local_interfaces = argv[++i]; | |
2848 | ||
2849 | /* Unknown -o argument */ | |
2850 | ||
2851 | else badarg = TRUE; | |
2852 | break; | |
2853 | ||
2854 | ||
2855 | /* -ps: force Perl startup; -pd force delayed Perl startup */ | |
2856 | ||
2857 | case 'p': | |
2858 | #ifdef EXIM_PERL | |
2859 | if (*argrest == 's' && argrest[1] == 0) | |
2860 | { | |
2861 | perl_start_option = 1; | |
2862 | break; | |
2863 | } | |
2864 | if (*argrest == 'd' && argrest[1] == 0) | |
2865 | { | |
2866 | perl_start_option = -1; | |
2867 | break; | |
2868 | } | |
2869 | #endif | |
2870 | ||
2871 | /* -panythingelse is taken as the Sendmail-compatible argument -prval:sval, | |
2872 | which sets the host protocol and host name */ | |
2873 | ||
2874 | if (*argrest == 0) | |
2875 | { | |
2876 | if (i+1 < argc) argrest = argv[++i]; else | |
2877 | { badarg = TRUE; break; } | |
2878 | } | |
2879 | ||
2880 | if (*argrest != 0) | |
2881 | { | |
2882 | uschar *hn = Ustrchr(argrest, ':'); | |
2883 | if (hn == NULL) | |
2884 | { | |
2885 | received_protocol = argrest; | |
2886 | } | |
2887 | else | |
2888 | { | |
2889 | received_protocol = string_copyn(argrest, hn - argrest); | |
2890 | sender_host_name = hn + 1; | |
2891 | } | |
2892 | } | |
2893 | break; | |
2894 | ||
2895 | ||
2896 | case 'q': | |
2897 | receiving_message = FALSE; | |
3cc66b45 PH |
2898 | if (queue_interval >= 0) |
2899 | { | |
2900 | fprintf(stderr, "exim: -q specified more than once\n"); | |
2901 | exit(EXIT_FAILURE); | |
2902 | } | |
059ec3d9 PH |
2903 | |
2904 | /* -qq...: Do queue runs in a 2-stage manner */ | |
2905 | ||
2906 | if (*argrest == 'q') | |
2907 | { | |
2908 | queue_2stage = TRUE; | |
2909 | argrest++; | |
2910 | } | |
2911 | ||
2912 | /* -qi...: Do only first (initial) deliveries */ | |
2913 | ||
2914 | if (*argrest == 'i') | |
2915 | { | |
2916 | queue_run_first_delivery = TRUE; | |
2917 | argrest++; | |
2918 | } | |
2919 | ||
2920 | /* -qf...: Run the queue, forcing deliveries | |
2921 | -qff..: Ditto, forcing thawing as well */ | |
2922 | ||
2923 | if (*argrest == 'f') | |
2924 | { | |
2925 | queue_run_force = TRUE; | |
2926 | if (*(++argrest) == 'f') | |
2927 | { | |
2928 | deliver_force_thaw = TRUE; | |
2929 | argrest++; | |
2930 | } | |
2931 | } | |
2932 | ||
2933 | /* -q[f][f]l...: Run the queue only on local deliveries */ | |
2934 | ||
2935 | if (*argrest == 'l') | |
2936 | { | |
2937 | queue_run_local = TRUE; | |
2938 | argrest++; | |
2939 | } | |
2940 | ||
2941 | /* -q[f][f][l]: Run the queue, optionally forced, optionally local only, | |
2942 | optionally starting from a given message id. */ | |
2943 | ||
2944 | if (*argrest == 0 && | |
2945 | (i + 1 >= argc || argv[i+1][0] == '-' || mac_ismsgid(argv[i+1]))) | |
2946 | { | |
2947 | queue_interval = 0; | |
2948 | if (i+1 < argc && mac_ismsgid(argv[i+1])) | |
2949 | start_queue_run_id = argv[++i]; | |
2950 | if (i+1 < argc && mac_ismsgid(argv[i+1])) | |
2951 | stop_queue_run_id = argv[++i]; | |
2952 | } | |
2953 | ||
2954 | /* -q[f][f][l]<n>: Run the queue at regular intervals, optionally forced, | |
2955 | optionally local only. */ | |
2956 | ||
2957 | else | |
2958 | { | |
2959 | if (*argrest != 0) | |
2960 | queue_interval = readconf_readtime(argrest, 0, FALSE); | |
2961 | else | |
2962 | queue_interval = readconf_readtime(argv[++i], 0, FALSE); | |
2963 | if (queue_interval <= 0) | |
2964 | { | |
2965 | fprintf(stderr, "exim: bad time value %s: abandoned\n", argv[i]); | |
2966 | exit(EXIT_FAILURE); | |
2967 | } | |
2968 | } | |
2969 | break; | |
2970 | ||
2971 | ||
2972 | case 'R': /* Synonymous with -qR... */ | |
2973 | receiving_message = FALSE; | |
2974 | ||
2975 | /* -Rf: As -R (below) but force all deliveries, | |
2976 | -Rff: Ditto, but also thaw all frozen messages, | |
2977 | -Rr: String is regex | |
2978 | -Rrf: Regex and force | |
2979 | -Rrff: Regex and force and thaw | |
2980 | ||
2981 | in all cases provided there are no further characters in this | |
2982 | argument. */ | |
2983 | ||
2984 | if (*argrest != 0) | |
2985 | { | |
2986 | int i; | |
2987 | for (i = 0; i < sizeof(rsopts)/sizeof(uschar *); i++) | |
2988 | { | |
2989 | if (Ustrcmp(argrest, rsopts[i]) == 0) | |
2990 | { | |
2991 | if (i != 2) queue_run_force = TRUE; | |
2992 | if (i >= 2) deliver_selectstring_regex = TRUE; | |
2993 | if (i == 1 || i == 4) deliver_force_thaw = TRUE; | |
2994 | argrest += Ustrlen(rsopts[i]); | |
2995 | } | |
2996 | } | |
2997 | } | |
2998 | ||
2999 | /* -R: Set string to match in addresses for forced queue run to | |
3000 | pick out particular messages. */ | |
3001 | ||
3002 | if (*argrest == 0) | |
3003 | { | |
3004 | if (i+1 < argc) deliver_selectstring = argv[++i]; else | |
3005 | { | |
3006 | fprintf(stderr, "exim: string expected after -R\n"); | |
3007 | exit(EXIT_FAILURE); | |
3008 | } | |
3009 | } | |
3010 | else deliver_selectstring = argrest; | |
059ec3d9 PH |
3011 | break; |
3012 | ||
3013 | ||
3014 | /* -r: an obsolete synonym for -f (see above) */ | |
3015 | ||
3016 | ||
3017 | /* -S: Like -R but works on sender. */ | |
3018 | ||
3019 | case 'S': /* Synonymous with -qS... */ | |
3020 | receiving_message = FALSE; | |
3021 | ||
3022 | /* -Sf: As -S (below) but force all deliveries, | |
3023 | -Sff: Ditto, but also thaw all frozen messages, | |
3024 | -Sr: String is regex | |
3025 | -Srf: Regex and force | |
3026 | -Srff: Regex and force and thaw | |
3027 | ||
3028 | in all cases provided there are no further characters in this | |
3029 | argument. */ | |
3030 | ||
3031 | if (*argrest != 0) | |
3032 | { | |
3033 | int i; | |
3034 | for (i = 0; i < sizeof(rsopts)/sizeof(uschar *); i++) | |
3035 | { | |
3036 | if (Ustrcmp(argrest, rsopts[i]) == 0) | |
3037 | { | |
3038 | if (i != 2) queue_run_force = TRUE; | |
3039 | if (i >= 2) deliver_selectstring_sender_regex = TRUE; | |
3040 | if (i == 1 || i == 4) deliver_force_thaw = TRUE; | |
3041 | argrest += Ustrlen(rsopts[i]); | |
3042 | } | |
3043 | } | |
3044 | } | |
3045 | ||
3046 | /* -S: Set string to match in addresses for forced queue run to | |
3047 | pick out particular messages. */ | |
3048 | ||
3049 | if (*argrest == 0) | |
3050 | { | |
3051 | if (i+1 < argc) deliver_selectstring_sender = argv[++i]; else | |
3052 | { | |
3053 | fprintf(stderr, "exim: string expected after -S\n"); | |
3054 | exit(EXIT_FAILURE); | |
3055 | } | |
3056 | } | |
3057 | else deliver_selectstring_sender = argrest; | |
059ec3d9 PH |
3058 | break; |
3059 | ||
3060 | /* -Tqt is an option that is exclusively for use by the testing suite. | |
3061 | It is not recognized in other circumstances. It allows for the setting up | |
3062 | of explicit "queue times" so that various warning/retry things can be | |
3063 | tested. Otherwise variability of clock ticks etc. cause problems. */ | |
3064 | ||
3065 | case 'T': | |
3066 | if (running_in_test_harness && Ustrcmp(argrest, "qt") == 0) | |
3067 | fudged_queue_times = argv[++i]; | |
3068 | else badarg = TRUE; | |
3069 | break; | |
3070 | ||
3071 | ||
3072 | /* -t: Set flag to extract recipients from body of message. */ | |
3073 | ||
3074 | case 't': | |
3075 | if (*argrest == 0) extract_recipients = TRUE; | |
3076 | ||
3077 | /* -ti: Set flag to extract recipients from body of message, and also | |
3078 | specify that dot does not end the message. */ | |
3079 | ||
3080 | else if (Ustrcmp(argrest, "i") == 0) | |
3081 | { | |
3082 | extract_recipients = TRUE; | |
3083 | dot_ends = FALSE; | |
3084 | } | |
3085 | ||
3086 | /* -tls-on-connect: don't wait for STARTTLS (for old clients) */ | |
3087 | ||
3088 | #ifdef SUPPORT_TLS | |
3089 | else if (Ustrcmp(argrest, "ls-on-connect") == 0) tls_on_connect = TRUE; | |
3090 | #endif | |
3091 | ||
3092 | else badarg = TRUE; | |
3093 | break; | |
3094 | ||
3095 | ||
3096 | /* -U: This means "initial user submission" in sendmail, apparently. The | |
3097 | doc claims that in future sendmail may refuse syntactically invalid | |
3098 | messages instead of fixing them. For the moment, we just ignore it. */ | |
3099 | ||
3100 | case 'U': | |
3101 | break; | |
3102 | ||
3103 | ||
3104 | /* -v: verify things - this is a very low-level debugging */ | |
3105 | ||
3106 | case 'v': | |
3107 | if (*argrest == 0) | |
3108 | { | |
3109 | debug_selector |= D_v; | |
3110 | debug_file = stderr; | |
3111 | } | |
3112 | else badarg = TRUE; | |
3113 | break; | |
3114 | ||
3115 | ||
3116 | /* -x: AIX uses this to indicate some fancy 8-bit character stuff: | |
3117 | ||
3118 | The -x flag tells the sendmail command that mail from a local | |
3119 | mail program has National Language Support (NLS) extended characters | |
3120 | in the body of the mail item. The sendmail command can send mail with | |
3121 | extended NLS characters across networks that normally corrupts these | |
3122 | 8-bit characters. | |
3123 | ||
3124 | As Exim is 8-bit clean, it just ignores this flag. */ | |
3125 | ||
3126 | case 'x': | |
3127 | if (*argrest != 0) badarg = TRUE; | |
3128 | break; | |
3129 | ||
3130 | /* All other initial characters are errors */ | |
3131 | ||
3132 | default: | |
3133 | badarg = TRUE; | |
3134 | break; | |
3135 | } /* End of high-level switch statement */ | |
3136 | ||
3137 | /* Failed to recognize the option, or syntax error */ | |
3138 | ||
3139 | if (badarg) | |
3140 | { | |
3141 | fprintf(stderr, "exim abandoned: unknown, malformed, or incomplete " | |
3142 | "option %s\n", arg); | |
3143 | exit(EXIT_FAILURE); | |
3144 | } | |
3145 | } | |
3146 | ||
3147 | ||
3cc66b45 PH |
3148 | /* If -R or -S have been specified without -q, assume a single queue run. */ |
3149 | ||
3150 | if ((deliver_selectstring != NULL || deliver_selectstring_sender != NULL) && | |
3151 | queue_interval < 0) queue_interval = 0; | |
3152 | ||
3153 | ||
059ec3d9 | 3154 | END_ARG: |
81ea09ca NM |
3155 | /* If usage_wanted is set we call the usage function - which never returns */ |
3156 | if (usage_wanted) exim_usage(called_as); | |
3157 | ||
3158 | /* Arguments have been processed. Check for incompatibilities. */ | |
059ec3d9 PH |
3159 | if (( |
3160 | (smtp_input || extract_recipients || recipients_arg < argc) && | |
3161 | (daemon_listen || queue_interval >= 0 || bi_option || | |
3162 | test_retry_arg >= 0 || test_rewrite_arg >= 0 || | |
f05da2e8 | 3163 | filter_test != FTEST_NONE || (msg_action_arg > 0 && !one_msg_action)) |
059ec3d9 PH |
3164 | ) || |
3165 | ( | |
3166 | msg_action_arg > 0 && | |
0ef732d9 PH |
3167 | (daemon_listen || queue_interval >= 0 || list_options || |
3168 | (checking && msg_action != MSG_LOAD) || | |
3169 | bi_option || test_retry_arg >= 0 || test_rewrite_arg >= 0) | |
059ec3d9 PH |
3170 | ) || |
3171 | ( | |
3172 | (daemon_listen || queue_interval >= 0) && | |
3173 | (sender_address != NULL || list_options || list_queue || checking || | |
0ef732d9 | 3174 | bi_option) |
059ec3d9 PH |
3175 | ) || |
3176 | ( | |
3177 | daemon_listen && queue_interval == 0 | |
3178 | ) || | |
3179 | ( | |
3180 | list_options && | |
3181 | (checking || smtp_input || extract_recipients || | |
f05da2e8 | 3182 | filter_test != FTEST_NONE || bi_option) |
059ec3d9 PH |
3183 | ) || |
3184 | ( | |
3185 | verify_address_mode && | |
3186 | (address_test_mode || smtp_input || extract_recipients || | |
f05da2e8 | 3187 | filter_test != FTEST_NONE || bi_option) |
059ec3d9 PH |
3188 | ) || |
3189 | ( | |
3190 | address_test_mode && (smtp_input || extract_recipients || | |
f05da2e8 | 3191 | filter_test != FTEST_NONE || bi_option) |
059ec3d9 PH |
3192 | ) || |
3193 | ( | |
f05da2e8 | 3194 | smtp_input && (sender_address != NULL || filter_test != FTEST_NONE || |
059ec3d9 PH |
3195 | extract_recipients) |
3196 | ) || | |
3197 | ( | |
3198 | deliver_selectstring != NULL && queue_interval < 0 | |
328895cc PH |
3199 | ) || |
3200 | ( | |
3201 | msg_action == MSG_LOAD && | |
3202 | (!expansion_test || expansion_test_message != NULL) | |
059ec3d9 PH |
3203 | ) |
3204 | ) | |
3205 | { | |
3206 | fprintf(stderr, "exim: incompatible command-line options or arguments\n"); | |
3207 | exit(EXIT_FAILURE); | |
3208 | } | |
3209 | ||
3210 | /* If debugging is set up, set the file and the file descriptor to pass on to | |
3211 | child processes. It should, of course, be 2 for stderr. Also, force the daemon | |
3212 | to run in the foreground. */ | |
3213 | ||
3214 | if (debug_selector != 0) | |
3215 | { | |
3216 | debug_file = stderr; | |
3217 | debug_fd = fileno(debug_file); | |
3218 | background_daemon = FALSE; | |
3219 | if (running_in_test_harness) millisleep(100); /* lets caller finish */ | |
3220 | if (debug_selector != D_v) /* -v only doesn't show this */ | |
3221 | { | |
3222 | debug_printf("Exim version %s uid=%ld gid=%ld pid=%d D=%x\n", | |
3223 | version_string, (long int)real_uid, (long int)real_gid, (int)getpid(), | |
3224 | debug_selector); | |
6545de78 PP |
3225 | if (!version_printed) |
3226 | show_whats_supported(stderr); | |
059ec3d9 PH |
3227 | } |
3228 | } | |
3229 | ||
3230 | /* When started with root privilege, ensure that the limits on the number of | |
3231 | open files and the number of processes (where that is accessible) are | |
3232 | sufficiently large, or are unset, in case Exim has been called from an | |
3233 | environment where the limits are screwed down. Not all OS have the ability to | |
3234 | change some of these limits. */ | |
3235 | ||
3236 | if (unprivileged) | |
3237 | { | |
3238 | DEBUG(D_any) debug_print_ids(US"Exim has no root privilege:"); | |
3239 | } | |
3240 | else | |
3241 | { | |
3242 | struct rlimit rlp; | |
3243 | ||
3244 | #ifdef RLIMIT_NOFILE | |
3245 | if (getrlimit(RLIMIT_NOFILE, &rlp) < 0) | |
3246 | { | |
3247 | log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NOFILE) failed: %s", | |
3248 | strerror(errno)); | |
3249 | rlp.rlim_cur = rlp.rlim_max = 0; | |
3250 | } | |
eb2c0248 PH |
3251 | |
3252 | /* I originally chose 1000 as a nice big number that was unlikely to | |
a494b1e1 PH |
3253 | be exceeded. It turns out that some older OS have a fixed upper limit of |
3254 | 256. */ | |
eb2c0248 | 3255 | |
059ec3d9 PH |
3256 | if (rlp.rlim_cur < 1000) |
3257 | { | |
3258 | rlp.rlim_cur = rlp.rlim_max = 1000; | |
3259 | if (setrlimit(RLIMIT_NOFILE, &rlp) < 0) | |
eb2c0248 | 3260 | { |
a494b1e1 PH |
3261 | rlp.rlim_cur = rlp.rlim_max = 256; |
3262 | if (setrlimit(RLIMIT_NOFILE, &rlp) < 0) | |
3263 | log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NOFILE) failed: %s", | |
3264 | strerror(errno)); | |
eb2c0248 | 3265 | } |
059ec3d9 PH |
3266 | } |
3267 | #endif | |
3268 | ||
3269 | #ifdef RLIMIT_NPROC | |
3270 | if (getrlimit(RLIMIT_NPROC, &rlp) < 0) | |
3271 | { | |
3272 | log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NPROC) failed: %s", | |
3273 | strerror(errno)); | |
3274 | rlp.rlim_cur = rlp.rlim_max = 0; | |
3275 | } | |
3276 | ||
3277 | #ifdef RLIM_INFINITY | |
3278 | if (rlp.rlim_cur != RLIM_INFINITY && rlp.rlim_cur < 1000) | |
3279 | { | |
3280 | rlp.rlim_cur = rlp.rlim_max = RLIM_INFINITY; | |
3281 | #else | |
3282 | if (rlp.rlim_cur < 1000) | |
3283 | { | |
3284 | rlp.rlim_cur = rlp.rlim_max = 1000; | |
3285 | #endif | |
3286 | if (setrlimit(RLIMIT_NPROC, &rlp) < 0) | |
3287 | log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NPROC) failed: %s", | |
3288 | strerror(errno)); | |
3289 | } | |
3290 | #endif | |
3291 | } | |
3292 | ||
3293 | /* Exim is normally entered as root (but some special configurations are | |
3294 | possible that don't do this). However, it always spins off sub-processes that | |
3295 | set their uid and gid as required for local delivery. We don't want to pass on | |
3296 | any extra groups that root may belong to, so we want to get rid of them all at | |
3297 | this point. | |
3298 | ||
3299 | We need to obey setgroups() at this stage, before possibly giving up root | |
3300 | privilege for a changed configuration file, but later on we might need to | |
3301 | check on the additional groups for the admin user privilege - can't do that | |
3302 | till after reading the config, which might specify the exim gid. Therefore, | |
3303 | save the group list here first. */ | |
3304 | ||
3305 | group_count = getgroups(NGROUPS_MAX, group_list); | |
cd59ab18 PP |
3306 | if (group_count < 0) |
3307 | { | |
3308 | fprintf(stderr, "exim: getgroups() failed: %s\n", strerror(errno)); | |
3309 | exit(EXIT_FAILURE); | |
3310 | } | |
059ec3d9 PH |
3311 | |
3312 | /* There is a fundamental difference in some BSD systems in the matter of | |
3313 | groups. FreeBSD and BSDI are known to be different; NetBSD and OpenBSD are | |
3314 | known not to be different. On the "different" systems there is a single group | |
3315 | list, and the first entry in it is the current group. On all other versions of | |
3316 | Unix there is a supplementary group list, which is in *addition* to the current | |
3317 | group. Consequently, to get rid of all extraneous groups on a "standard" system | |
3318 | you pass over 0 groups to setgroups(), while on a "different" system you pass | |
3319 | over a single group - the current group, which is always the first group in the | |
3320 | list. Calling setgroups() with zero groups on a "different" system results in | |
3321 | an error return. The following code should cope with both types of system. | |
3322 | ||
3323 | However, if this process isn't running as root, setgroups() can't be used | |
3324 | since you have to be root to run it, even if throwing away groups. Not being | |
3325 | root here happens only in some unusual configurations. We just ignore the | |
3326 | error. */ | |
3327 | ||
3328 | if (setgroups(0, NULL) != 0) | |
3329 | { | |
3330 | if (setgroups(1, group_list) != 0 && !unprivileged) | |
3331 | { | |
3332 | fprintf(stderr, "exim: setgroups() failed: %s\n", strerror(errno)); | |
3333 | exit(EXIT_FAILURE); | |
3334 | } | |
3335 | } | |
3336 | ||
3337 | /* If the configuration file name has been altered by an argument on the | |
3338 | command line (either a new file name or a macro definition) and the caller is | |
cd25e41d DW |
3339 | not root, or if this is a filter testing run, remove any setuid privilege the |
3340 | program has and run as the underlying user. | |
059ec3d9 | 3341 | |
cd25e41d DW |
3342 | The exim user is locked out of this, which severely restricts the use of -C |
3343 | for some purposes. | |
059ec3d9 PH |
3344 | |
3345 | Otherwise, set the real ids to the effective values (should be root unless run | |
3346 | from inetd, which it can either be root or the exim uid, if one is configured). | |
3347 | ||
3348 | There is a private mechanism for bypassing some of this, in order to make it | |
3349 | possible to test lots of configurations automatically, without having either to | |
3350 | recompile each time, or to patch in an actual configuration file name and other | |
3351 | values (such as the path name). If running in the test harness, pretend that | |
3352 | configuration file changes and macro definitions haven't happened. */ | |
3353 | ||
3354 | if (( /* EITHER */ | |
a7cbbf50 PP |
3355 | (!trusted_config || /* Config changed, or */ |
3356 | !macros_trusted()) && /* impermissible macros and */ | |
059ec3d9 | 3357 | real_uid != root_uid && /* Not root, and */ |
059ec3d9 PH |
3358 | !running_in_test_harness /* Not fudged */ |
3359 | ) || /* OR */ | |
3360 | expansion_test /* expansion testing */ | |
3361 | || /* OR */ | |
f05da2e8 | 3362 | filter_test != FTEST_NONE) /* Filter testing */ |
059ec3d9 PH |
3363 | { |
3364 | setgroups(group_count, group_list); | |
3365 | exim_setugid(real_uid, real_gid, FALSE, | |
3366 | US"-C, -D, -be or -bf forces real uid"); | |
3367 | removed_privilege = TRUE; | |
3368 | ||
3369 | /* In the normal case when Exim is called like this, stderr is available | |
3370 | and should be used for any logging information because attempts to write | |
3371 | to the log will usually fail. To arrange this, we unset really_exim. However, | |
3372 | if no stderr is available there is no point - we might as well have a go | |
b7487bce | 3373 | at the log (if it fails, syslog will be written). |
059ec3d9 | 3374 | |
b7487bce PP |
3375 | Note that if the invoker is Exim, the logs remain available. Messing with |
3376 | this causes unlogged successful deliveries. */ | |
3377 | ||
3378 | if ((log_stderr != NULL) && (real_uid != exim_uid)) | |
3379 | really_exim = FALSE; | |
059ec3d9 PH |
3380 | } |
3381 | ||
3382 | /* Privilege is to be retained for the moment. It may be dropped later, | |
3383 | depending on the job that this Exim process has been asked to do. For now, set | |
3384 | the real uid to the effective so that subsequent re-execs of Exim are done by a | |
3385 | privileged user. */ | |
3386 | ||
3387 | else exim_setugid(geteuid(), getegid(), FALSE, US"forcing real = effective"); | |
3388 | ||
f05da2e8 | 3389 | /* If testing a filter, open the file(s) now, before wasting time doing other |
059ec3d9 PH |
3390 | setups and reading the message. */ |
3391 | ||
f05da2e8 PH |
3392 | if ((filter_test & FTEST_SYSTEM) != 0) |
3393 | { | |
3394 | filter_sfd = Uopen(filter_test_sfile, O_RDONLY, 0); | |
3395 | if (filter_sfd < 0) | |
3396 | { | |
3397 | fprintf(stderr, "exim: failed to open %s: %s\n", filter_test_sfile, | |
3398 | strerror(errno)); | |
3399 | return EXIT_FAILURE; | |
3400 | } | |
3401 | } | |
3402 | ||
3403 | if ((filter_test & FTEST_USER) != 0) | |
059ec3d9 | 3404 | { |
f05da2e8 PH |
3405 | filter_ufd = Uopen(filter_test_ufile, O_RDONLY, 0); |
3406 | if (filter_ufd < 0) | |
059ec3d9 | 3407 | { |
f05da2e8 | 3408 | fprintf(stderr, "exim: failed to open %s: %s\n", filter_test_ufile, |
059ec3d9 PH |
3409 | strerror(errno)); |
3410 | return EXIT_FAILURE; | |
3411 | } | |
3412 | } | |
3413 | ||
3414 | /* Read the main runtime configuration data; this gives up if there | |
3415 | is a failure. It leaves the configuration file open so that the subsequent | |
3416 | configuration data for delivery can be read if needed. */ | |
3417 | ||
3418 | readconf_main(); | |
3419 | ||
3420 | /* Handle the decoding of logging options. */ | |
3421 | ||
ed7f7860 PP |
3422 | decode_bits(&log_write_selector, &log_extra_selector, 0, 0, |
3423 | log_selector_string, log_options, log_options_count, US"log", 0); | |
059ec3d9 PH |
3424 | |
3425 | DEBUG(D_any) | |
3426 | { | |
3427 | debug_printf("configuration file is %s\n", config_main_filename); | |
3428 | debug_printf("log selectors = %08x %08x\n", log_write_selector, | |
3429 | log_extra_selector); | |
3430 | } | |
3431 | ||
3432 | /* If domain literals are not allowed, check the sender address that was | |
3433 | supplied with -f. Ditto for a stripped trailing dot. */ | |
3434 | ||
3435 | if (sender_address != NULL) | |
3436 | { | |
3437 | if (sender_address[sender_address_domain] == '[' && !allow_domain_literals) | |
3438 | { | |
3439 | fprintf(stderr, "exim: bad -f address \"%s\": domain literals not " | |
3440 | "allowed\n", sender_address); | |
3441 | return EXIT_FAILURE; | |
3442 | } | |
3443 | if (f_end_dot && !strip_trailing_dot) | |
3444 | { | |
3445 | fprintf(stderr, "exim: bad -f address \"%s.\": domain is malformed " | |
3446 | "(trailing dot not allowed)\n", sender_address); | |
3447 | return EXIT_FAILURE; | |
3448 | } | |
3449 | } | |
3450 | ||
3451 | /* Paranoia check of maximum lengths of certain strings. There is a check | |
3452 | on the length of the log file path in log.c, which will come into effect | |
3453 | if there are any calls to write the log earlier than this. However, if we | |
3454 | get this far but the string is very long, it is better to stop now than to | |
3455 | carry on and (e.g.) receive a message and then have to collapse. The call to | |
3456 | log_write() from here will cause the ultimate panic collapse if the complete | |
3457 | file name exceeds the buffer length. */ | |
3458 | ||
3459 | if (Ustrlen(log_file_path) > 200) | |
3460 | log_write(0, LOG_MAIN|LOG_PANIC_DIE, | |
3461 | "log_file_path is longer than 200 chars: aborting"); | |
3462 | ||
3463 | if (Ustrlen(pid_file_path) > 200) | |
3464 | log_write(0, LOG_MAIN|LOG_PANIC_DIE, | |
3465 | "pid_file_path is longer than 200 chars: aborting"); | |
3466 | ||
3467 | if (Ustrlen(spool_directory) > 200) | |
3468 | log_write(0, LOG_MAIN|LOG_PANIC_DIE, | |
3469 | "spool_directory is longer than 200 chars: aborting"); | |
3470 | ||
3471 | /* Length check on the process name given to syslog for its TAG field, | |
3472 | which is only permitted to be 32 characters or less. See RFC 3164. */ | |
3473 | ||
3474 | if (Ustrlen(syslog_processname) > 32) | |
3475 | log_write(0, LOG_MAIN|LOG_PANIC_DIE, | |
3476 | "syslog_processname is longer than 32 chars: aborting"); | |
3477 | ||
3478 | /* In some operating systems, the environment variable TMPDIR controls where | |
3479 | temporary files are created; Exim doesn't use these (apart from when delivering | |
3480 | to MBX mailboxes), but called libraries such as DBM libraries may require them. | |
3481 | If TMPDIR is found in the environment, reset it to the value defined in the | |
3482 | TMPDIR macro, if this macro is defined. */ | |
3483 | ||
3484 | #ifdef TMPDIR | |
3485 | { | |
3486 | uschar **p; | |
3487 | for (p = USS environ; *p != NULL; p++) | |
3488 | { | |
3489 | if (Ustrncmp(*p, "TMPDIR=", 7) == 0 && | |
3490 | Ustrcmp(*p+7, TMPDIR) != 0) | |
3491 | { | |
3492 | uschar *newp = malloc(Ustrlen(TMPDIR) + 8); | |
3493 | sprintf(CS newp, "TMPDIR=%s", TMPDIR); | |
3494 | *p = newp; | |
3495 | DEBUG(D_any) debug_printf("reset TMPDIR=%s in environment\n", TMPDIR); | |
3496 | } | |
3497 | } | |
3498 | } | |
3499 | #endif | |
3500 | ||
3501 | /* Timezone handling. If timezone_string is "utc", set a flag to cause all | |
3502 | timestamps to be in UTC (gmtime() is used instead of localtime()). Otherwise, | |
3503 | we may need to get rid of a bogus timezone setting. This can arise when Exim is | |
3504 | called by a user who has set the TZ variable. This then affects the timestamps | |
3505 | in log files and in Received: headers, and any created Date: header lines. The | |
3506 | required timezone is settable in the configuration file, so nothing can be done | |
3507 | about this earlier - but hopefully nothing will normally be logged earlier than | |
3508 | this. We have to make a new environment if TZ is wrong, but don't bother if | |
3509 | timestamps_utc is set, because then all times are in UTC anyway. */ | |
3510 | ||
3511 | if (timezone_string != NULL && strcmpic(timezone_string, US"UTC") == 0) | |
3512 | { | |
3513 | timestamps_utc = TRUE; | |
3514 | } | |
3515 | else | |
3516 | { | |
3517 | uschar *envtz = US getenv("TZ"); | |
3518 | if ((envtz == NULL && timezone_string != NULL) || | |
3519 | (envtz != NULL && | |
3520 | (timezone_string == NULL || | |
3521 | Ustrcmp(timezone_string, envtz) != 0))) | |
3522 | { | |
3523 | uschar **p = USS environ; | |
3524 | uschar **new; | |
3525 | uschar **newp; | |
3526 | int count = 0; | |
3527 | while (*p++ != NULL) count++; | |
3528 | if (envtz == NULL) count++; | |
3529 | newp = new = malloc(sizeof(uschar *) * (count + 1)); | |
3530 | for (p = USS environ; *p != NULL; p++) | |
3531 | { | |
3532 | if (Ustrncmp(*p, "TZ=", 3) == 0) continue; | |
3533 | *newp++ = *p; | |
3534 | } | |
3535 | if (timezone_string != NULL) | |
3536 | { | |
3537 | *newp = malloc(Ustrlen(timezone_string) + 4); | |
3538 | sprintf(CS *newp++, "TZ=%s", timezone_string); | |
3539 | } | |
3540 | *newp = NULL; | |
3541 | environ = CSS new; | |
3542 | tzset(); | |
3543 | DEBUG(D_any) debug_printf("Reset TZ to %s: time is %s\n", timezone_string, | |
3544 | tod_stamp(tod_log)); | |
3545 | } | |
3546 | } | |
3547 | ||
3548 | /* Handle the case when we have removed the setuid privilege because of -C or | |
cd25e41d | 3549 | -D. This means that the caller of Exim was not root. |
059ec3d9 | 3550 | |
cd25e41d DW |
3551 | There is a problem if we were running as the Exim user. The sysadmin may |
3552 | expect this case to retain privilege because "the binary was called by the | |
3553 | Exim user", but it hasn't, because either the -D option set macros, or the | |
261dc43e | 3554 | -C option set a non-trusted configuration file. There are two possibilities: |
059ec3d9 PH |
3555 | |
3556 | (1) If deliver_drop_privilege is set, Exim is not going to re-exec in order | |
3557 | to do message deliveries. Thus, the fact that it is running as a | |
3558 | non-privileged user is plausible, and might be wanted in some special | |
3559 | configurations. However, really_exim will have been set false when | |
3560 | privilege was dropped, to stop Exim trying to write to its normal log | |
3561 | files. Therefore, re-enable normal log processing, assuming the sysadmin | |
3562 | has set up the log directory correctly. | |
3563 | ||
3564 | (2) If deliver_drop_privilege is not set, the configuration won't work as | |
3565 | apparently intended, and so we log a panic message. In order to retain | |
261dc43e DW |
3566 | root for -C or -D, the caller must either be root or be invoking a |
3567 | trusted configuration file (when deliver_drop_privilege is false). */ | |
059ec3d9 | 3568 | |
e2f5dc15 | 3569 | if (removed_privilege && (!trusted_config || macros != NULL) && |
059ec3d9 PH |
3570 | real_uid == exim_uid) |
3571 | { | |
059ec3d9 PH |
3572 | if (deliver_drop_privilege) |
3573 | really_exim = TRUE; /* let logging work normally */ | |
3574 | else | |
3575 | log_write(0, LOG_MAIN|LOG_PANIC, | |
cd25e41d | 3576 | "exim user lost privilege for using %s option", |
90b6341f | 3577 | trusted_config? "-D" : "-C"); |
059ec3d9 PH |
3578 | } |
3579 | ||
3580 | /* Start up Perl interpreter if Perl support is configured and there is a | |
3581 | perl_startup option, and the configuration or the command line specifies | |
3582 | initializing starting. Note that the global variables are actually called | |
3583 | opt_perl_xxx to avoid clashing with perl's namespace (perl_*). */ | |
3584 | ||
3585 | #ifdef EXIM_PERL | |
3586 | if (perl_start_option != 0) | |
3587 | opt_perl_at_start = (perl_start_option > 0); | |
3588 | if (opt_perl_at_start && opt_perl_startup != NULL) | |
3589 | { | |
3590 | uschar *errstr; | |
3591 | DEBUG(D_any) debug_printf("Starting Perl interpreter\n"); | |
3592 | errstr = init_perl(opt_perl_startup); | |
3593 | if (errstr != NULL) | |
3594 | { | |
3595 | fprintf(stderr, "exim: error in perl_startup code: %s\n", errstr); | |
3596 | return EXIT_FAILURE; | |
3597 | } | |
3598 | opt_perl_started = TRUE; | |
3599 | } | |
3600 | #endif /* EXIM_PERL */ | |
3601 | ||
6545de78 PP |
3602 | /* Initialise lookup_list |
3603 | If debugging, already called above via version reporting. | |
3604 | This does mean that debugging causes the list to be initialised while root. | |
3605 | This *should* be harmless -- all modules are loaded from a fixed dir and | |
3606 | it's code that would, if not a module, be part of Exim already. */ | |
e6d225ae DW |
3607 | init_lookup_list(); |
3608 | ||
059ec3d9 PH |
3609 | /* Log the arguments of the call if the configuration file said so. This is |
3610 | a debugging feature for finding out what arguments certain MUAs actually use. | |
3611 | Don't attempt it if logging is disabled, or if listing variables or if | |
3612 | verifying/testing addresses or expansions. */ | |
3613 | ||
31619da6 PH |
3614 | if (((debug_selector & D_any) != 0 || (log_extra_selector & LX_arguments) != 0) |
3615 | && really_exim && !list_options && !checking) | |
059ec3d9 PH |
3616 | { |
3617 | int i; | |
3618 | uschar *p = big_buffer; | |
3619 | Ustrcpy(p, "cwd="); | |
3620 | (void)getcwd(CS p+4, big_buffer_size - 4); | |
3621 | while (*p) p++; | |
3622 | (void)string_format(p, big_buffer_size - (p - big_buffer), " %d args:", argc); | |
3623 | while (*p) p++; | |
3624 | for (i = 0; i < argc; i++) | |
3625 | { | |
3626 | int len = Ustrlen(argv[i]); | |
3627 | uschar *printing; | |
3628 | uschar *quote; | |
3629 | if (p + len + 8 >= big_buffer + big_buffer_size) | |
3630 | { | |
3631 | Ustrcpy(p, " ..."); | |
3632 | log_write(0, LOG_MAIN, "%s", big_buffer); | |
3633 | Ustrcpy(big_buffer, "..."); | |
3634 | p = big_buffer + 3; | |
3635 | } | |
3636 | printing = string_printing(argv[i]); | |
3637 | if (printing[0] == 0) quote = US"\""; else | |
3638 | { | |
3639 | uschar *pp = printing; | |
3640 | quote = US""; | |
3641 | while (*pp != 0) if (isspace(*pp++)) { quote = US"\""; break; } | |
3642 | } | |
3643 | sprintf(CS p, " %s%.*s%s", quote, (int)(big_buffer_size - | |
3644 | (p - big_buffer) - 4), printing, quote); | |
3645 | while (*p) p++; | |
3646 | } | |
31619da6 PH |
3647 | |
3648 | if ((log_extra_selector & LX_arguments) != 0) | |
3649 | log_write(0, LOG_MAIN, "%s", big_buffer); | |
3650 | else | |
3651 | debug_printf("%s\n", big_buffer); | |
059ec3d9 PH |
3652 | } |
3653 | ||
3654 | /* Set the working directory to be the top-level spool directory. We don't rely | |
3655 | on this in the code, which always uses fully qualified names, but it's useful | |
3656 | for core dumps etc. Don't complain if it fails - the spool directory might not | |
3657 | be generally accessible and calls with the -C option (and others) have lost | |
ba18e66a PH |
3658 | privilege by now. Before the chdir, we try to ensure that the directory exists. |
3659 | */ | |
059ec3d9 PH |
3660 | |
3661 | if (Uchdir(spool_directory) != 0) | |
3662 | { | |
ba18e66a | 3663 | (void)directory_make(spool_directory, US"", SPOOL_DIRECTORY_MODE, FALSE); |
059ec3d9 PH |
3664 | (void)Uchdir(spool_directory); |
3665 | } | |
3666 | ||
3667 | /* Handle calls with the -bi option. This is a sendmail option to rebuild *the* | |
3668 | alias file. Exim doesn't have such a concept, but this call is screwed into | |
3669 | Sun's YP makefiles. Handle this by calling a configured script, as the real | |
3670 | user who called Exim. The -oA option can be used to pass an argument to the | |
3671 | script. */ | |
3672 | ||
3673 | if (bi_option) | |
3674 | { | |
1fe64dcc | 3675 | (void)fclose(config_file); |
059ec3d9 PH |
3676 | if (bi_command != NULL) |
3677 | { | |
3678 | int i = 0; | |
3679 | uschar *argv[3]; | |
3680 | argv[i++] = bi_command; | |
3681 | if (alias_arg != NULL) argv[i++] = alias_arg; | |
3682 | argv[i++] = NULL; | |
3683 | ||
3684 | setgroups(group_count, group_list); | |
3685 | exim_setugid(real_uid, real_gid, FALSE, US"running bi_command"); | |
3686 | ||
3687 | DEBUG(D_exec) debug_printf("exec %.256s %.256s\n", argv[0], | |
3688 | (argv[1] == NULL)? US"" : argv[1]); | |
3689 | ||
3690 | execv(CS argv[0], (char *const *)argv); | |
3691 | fprintf(stderr, "exim: exec failed: %s\n", strerror(errno)); | |
3692 | exit(EXIT_FAILURE); | |
3693 | } | |
3694 | else | |
3695 | { | |
3696 | DEBUG(D_any) debug_printf("-bi used but bi_command not set; exiting\n"); | |
3697 | exit(EXIT_SUCCESS); | |
3698 | } | |
3699 | } | |
3700 | ||
3701 | /* If an action on specific messages is requested, or if a daemon or queue | |
3702 | runner is being started, we need to know if Exim was called by an admin user. | |
3703 | This is the case if the real user is root or exim, or if the real group is | |
3704 | exim, or if one of the supplementary groups is exim or a group listed in | |
3705 | admin_groups. We don't fail all message actions immediately if not admin_user, | |
3706 | since some actions can be performed by non-admin users. Instead, set admin_user | |
3707 | for later interrogation. */ | |
3708 | ||
3709 | if (real_uid == root_uid || real_uid == exim_uid || real_gid == exim_gid) | |
3710 | admin_user = TRUE; | |
3711 | else | |
3712 | { | |
3713 | int i, j; | |
059ec3d9 PH |
3714 | for (i = 0; i < group_count; i++) |
3715 | { | |
3716 | if (group_list[i] == exim_gid) admin_user = TRUE; | |
3717 | else if (admin_groups != NULL) | |
3718 | { | |
3719 | for (j = 1; j <= (int)(admin_groups[0]); j++) | |
3720 | if (admin_groups[j] == group_list[i]) | |
3721 | { admin_user = TRUE; break; } | |
3722 | } | |
3723 | if (admin_user) break; | |
3724 | } | |
3725 | } | |
3726 | ||
3727 | /* Another group of privileged users are the trusted users. These are root, | |
3728 | exim, and any caller matching trusted_users or trusted_groups. Trusted callers | |
3729 | are permitted to specify sender_addresses with -f on the command line, and | |
3730 | other message parameters as well. */ | |
3731 | ||
3732 | if (real_uid == root_uid || real_uid == exim_uid) | |
3733 | trusted_caller = TRUE; | |
3734 | else | |
3735 | { | |
3736 | int i, j; | |
3737 | ||
3738 | if (trusted_users != NULL) | |
3739 | { | |
3740 | for (i = 1; i <= (int)(trusted_users[0]); i++) | |
3741 | if (trusted_users[i] == real_uid) | |
3742 | { trusted_caller = TRUE; break; } | |
3743 | } | |
3744 | ||
3745 | if (!trusted_caller && trusted_groups != NULL) | |
3746 | { | |
3747 | for (i = 1; i <= (int)(trusted_groups[0]); i++) | |
3748 | { | |
3749 | if (trusted_groups[i] == real_gid) | |
3750 | trusted_caller = TRUE; | |
3751 | else for (j = 0; j < group_count; j++) | |
3752 | { | |
3753 | if (trusted_groups[i] == group_list[j]) | |
3754 | { trusted_caller = TRUE; break; } | |
3755 | } | |
3756 | if (trusted_caller) break; | |
3757 | } | |
3758 | } | |
3759 | } | |
3760 | ||
3761 | if (trusted_caller) DEBUG(D_any) debug_printf("trusted user\n"); | |
3762 | if (admin_user) DEBUG(D_any) debug_printf("admin user\n"); | |
3763 | ||
3764 | /* Only an admin user may start the daemon or force a queue run in the default | |
3765 | configuration, but the queue run restriction can be relaxed. Only an admin | |
3766 | user may request that a message be returned to its sender forthwith. Only an | |
3767 | admin user may specify a debug level greater than D_v (because it might show | |
3768 | passwords, etc. in lookup queries). Only an admin user may request a queue | |
8544e77a PP |
3769 | count. Only an admin user can use the test interface to scan for email |
3770 | (because Exim will be in the spool dir and able to look at mails). */ | |
059ec3d9 PH |
3771 | |
3772 | if (!admin_user) | |
3773 | { | |
3774 | BOOL debugset = (debug_selector & ~D_v) != 0; | |
8544e77a | 3775 | if (deliver_give_up || daemon_listen || malware_test_file || |
059ec3d9 PH |
3776 | (count_queue && queue_list_requires_admin) || |
3777 | (list_queue && queue_list_requires_admin) || | |
3778 | (queue_interval >= 0 && prod_requires_admin) || | |
3779 | (debugset && !running_in_test_harness)) | |
3780 | { | |
3781 | fprintf(stderr, "exim:%s permission denied\n", debugset? " debugging" : ""); | |
3782 | exit(EXIT_FAILURE); | |
3783 | } | |
3784 | } | |
3785 | ||
3786 | /* If the real user is not root or the exim uid, the argument for passing | |
3787 | in an open TCP/IP connection for another message is not permitted, nor is | |
3788 | running with the -N option for any delivery action, unless this call to exim is | |
3789 | one that supplied an input message, or we are using a patched exim for | |
3790 | regression testing. */ | |
3791 | ||
3792 | if (real_uid != root_uid && real_uid != exim_uid && | |
3793 | (continue_hostname != NULL || | |
3794 | (dont_deliver && | |
3795 | (queue_interval >= 0 || daemon_listen || msg_action_arg > 0) | |
3796 | )) && !running_in_test_harness) | |
3797 | { | |
3798 | fprintf(stderr, "exim: Permission denied\n"); | |
3799 | return EXIT_FAILURE; | |
3800 | } | |
3801 | ||
3802 | /* If the caller is not trusted, certain arguments are ignored when running for | |
f05da2e8 PH |
3803 | real, but are permitted when checking things (-be, -bv, -bt, -bh, -bf, -bF). |
3804 | Note that authority for performing certain actions on messages is tested in the | |
059ec3d9 PH |
3805 | queue_action() function. */ |
3806 | ||
f05da2e8 | 3807 | if (!trusted_caller && !checking && filter_test == FTEST_NONE) |
059ec3d9 PH |
3808 | { |
3809 | sender_host_name = sender_host_address = interface_address = | |
3810 | sender_ident = received_protocol = NULL; | |
3811 | sender_host_port = interface_port = 0; | |
3812 | sender_host_authenticated = authenticated_sender = authenticated_id = NULL; | |
3813 | } | |
3814 | ||
3815 | /* If a sender host address is set, extract the optional port number off the | |
3816 | end of it and check its syntax. Do the same thing for the interface address. | |
3817 | Exim exits if the syntax is bad. */ | |
3818 | ||
3819 | else | |
3820 | { | |
3821 | if (sender_host_address != NULL) | |
3822 | sender_host_port = check_port(sender_host_address); | |
3823 | if (interface_address != NULL) | |
3824 | interface_port = check_port(interface_address); | |
3825 | } | |
3826 | ||
3827 | /* If an SMTP message is being received check to see if the standard input is a | |
3828 | TCP/IP socket. If it is, we assume that Exim was called from inetd if the | |
3829 | caller is root or the Exim user, or if the port is a privileged one. Otherwise, | |
3830 | barf. */ | |
3831 | ||
3832 | if (smtp_input) | |
3833 | { | |
3834 | union sockaddr_46 inetd_sock; | |
36a3b041 | 3835 | EXIM_SOCKLEN_T size = sizeof(inetd_sock); |
059ec3d9 PH |
3836 | if (getpeername(0, (struct sockaddr *)(&inetd_sock), &size) == 0) |
3837 | { | |
3838 | int family = ((struct sockaddr *)(&inetd_sock))->sa_family; | |
3839 | if (family == AF_INET || family == AF_INET6) | |
3840 | { | |
3841 | union sockaddr_46 interface_sock; | |
3842 | size = sizeof(interface_sock); | |
3843 | ||
3844 | if (getsockname(0, (struct sockaddr *)(&interface_sock), &size) == 0) | |
3845 | interface_address = host_ntoa(-1, &interface_sock, NULL, | |
3846 | &interface_port); | |
3847 | ||
3848 | if (host_is_tls_on_connect_port(interface_port)) tls_on_connect = TRUE; | |
3849 | ||
3850 | if (real_uid == root_uid || real_uid == exim_uid || interface_port < 1024) | |
3851 | { | |
3852 | is_inetd = TRUE; | |
3853 | sender_host_address = host_ntoa(-1, (struct sockaddr *)(&inetd_sock), | |
3854 | NULL, &sender_host_port); | |
3855 | if (mua_wrapper) log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Input from " | |
3856 | "inetd is not supported when mua_wrapper is set"); | |
3857 | } | |
3858 | else | |
3859 | { | |
3860 | fprintf(stderr, | |
3861 | "exim: Permission denied (unprivileged user, unprivileged port)\n"); | |
3862 | return EXIT_FAILURE; | |
3863 | } | |
3864 | } | |
3865 | } | |
3866 | } | |
3867 | ||
3868 | /* If the load average is going to be needed while receiving a message, get it | |
3869 | now for those OS that require the first call to os_getloadavg() to be done as | |
3870 | root. There will be further calls later for each message received. */ | |
3871 | ||
3872 | #ifdef LOAD_AVG_NEEDS_ROOT | |
3873 | if (receiving_message && | |
3874 | (queue_only_load >= 0 || | |
3875 | (is_inetd && smtp_load_reserve >= 0) | |
3876 | )) | |
3877 | { | |
8669f003 | 3878 | load_average = OS_GETLOADAVG(); |
059ec3d9 PH |
3879 | } |
3880 | #endif | |
3881 | ||
3882 | /* The queue_only configuration option can be overridden by -odx on the command | |
3883 | line, except that if queue_only_override is false, queue_only cannot be unset | |
3884 | from the command line. */ | |
3885 | ||
3886 | if (queue_only_set && (queue_only_override || arg_queue_only)) | |
3887 | queue_only = arg_queue_only; | |
3888 | ||
3889 | /* The receive_timeout and smtp_receive_timeout options can be overridden by | |
3890 | -or and -os. */ | |
3891 | ||
3892 | if (arg_receive_timeout >= 0) receive_timeout = arg_receive_timeout; | |
3893 | if (arg_smtp_receive_timeout >= 0) | |
3894 | smtp_receive_timeout = arg_smtp_receive_timeout; | |
3895 | ||
3896 | /* If Exim was started with root privilege, unless we have already removed the | |
3897 | root privilege above as a result of -C, -D, -be, -bf or -bF, remove it now | |
3898 | except when starting the daemon or doing some kind of delivery or address | |
3899 | testing (-bt). These are the only cases when root need to be retained. We run | |
3900 | as exim for -bv and -bh. However, if deliver_drop_privilege is set, root is | |
805e5aab TF |
3901 | retained only for starting the daemon. We always do the initgroups() in this |
3902 | situation (controlled by the TRUE below), in order to be as close as possible | |
3903 | to the state Exim usually runs in. */ | |
059ec3d9 PH |
3904 | |
3905 | if (!unprivileged && /* originally had root AND */ | |
3906 | !removed_privilege && /* still got root AND */ | |
3907 | !daemon_listen && /* not starting the daemon */ | |
3908 | queue_interval <= 0 && /* (either kind of daemon) */ | |
3909 | ( /* AND EITHER */ | |
3910 | deliver_drop_privilege || /* requested unprivileged */ | |
3911 | ( /* OR */ | |
3912 | queue_interval < 0 && /* not running the queue */ | |
3913 | (msg_action_arg < 0 || /* and */ | |
3914 | msg_action != MSG_DELIVER) && /* not delivering and */ | |
3915 | (!checking || !address_test_mode) /* not address checking */ | |
3916 | ) | |
3917 | )) | |
3918 | { | |
805e5aab | 3919 | exim_setugid(exim_uid, exim_gid, TRUE, US"privilege not needed"); |
059ec3d9 PH |
3920 | } |
3921 | ||
3922 | /* When we are retaining a privileged uid, we still change to the exim gid. */ | |
3923 | ||
1670ef10 PP |
3924 | else |
3925 | { | |
3926 | int rv; | |
3927 | rv = setgid(exim_gid); | |
3928 | /* Impact of failure is that some stuff might end up with an incorrect group. | |
3929 | We track this for failures from root, since any attempt to change privilege | |
3930 | by root should succeed and failures should be examined. For non-root, | |
3931 | there's no security risk. For me, it's { exim -bV } on a just-built binary, | |
3932 | no need to complain then. */ | |
3933 | if (rv == -1) | |
3934 | { | |
33191679 | 3935 | if (!(unprivileged || removed_privilege)) |
1670ef10 PP |
3936 | { |
3937 | fprintf(stderr, | |
3938 | "exim: changing group failed: %s\n", strerror(errno)); | |
3939 | exit(EXIT_FAILURE); | |
3940 | } | |
3941 | else | |
33191679 | 3942 | DEBUG(D_any) debug_printf("changing group to %ld failed: %s\n", |
1670ef10 PP |
3943 | (long int)exim_gid, strerror(errno)); |
3944 | } | |
3945 | } | |
059ec3d9 | 3946 | |
8544e77a PP |
3947 | /* Handle a request to scan a file for malware */ |
3948 | if (malware_test_file) | |
3949 | { | |
dbc4b90d | 3950 | #ifdef WITH_CONTENT_SCAN |
8544e77a PP |
3951 | int result; |
3952 | set_process_info("scanning file for malware"); | |
3953 | result = malware_in_file(malware_test_file); | |
3954 | if (result == FAIL) | |
3955 | { | |
3956 | printf("No malware found.\n"); | |
3957 | exit(EXIT_SUCCESS); | |
3958 | } | |
3959 | if (result != OK) | |
3960 | { | |
3961 | printf("Malware lookup returned non-okay/fail: %d\n", result); | |
3962 | exit(EXIT_FAILURE); | |
3963 | } | |
3964 | if (malware_name) | |
3965 | printf("Malware found: %s\n", malware_name); | |
3966 | else | |
3967 | printf("Malware scan detected malware of unknown name.\n"); | |
dbc4b90d PP |
3968 | #else |
3969 | printf("Malware scanning not enabled at compile time.\n"); | |
3970 | #endif | |
8544e77a PP |
3971 | exit(EXIT_FAILURE); |
3972 | } | |
3973 | ||
059ec3d9 PH |
3974 | /* Handle a request to list the delivery queue */ |
3975 | ||
3976 | if (list_queue) | |
3977 | { | |
3978 | set_process_info("listing the queue"); | |
3979 | queue_list(list_queue_option, argv + recipients_arg, argc - recipients_arg); | |
3980 | exit(EXIT_SUCCESS); | |
3981 | } | |
3982 | ||
3983 | /* Handle a request to count the delivery queue */ | |
3984 | ||
3985 | if (count_queue) | |
3986 | { | |
3987 | set_process_info("counting the queue"); | |
3988 | queue_count(); | |
3989 | exit(EXIT_SUCCESS); | |
3990 | } | |
3991 | ||
0ef732d9 PH |
3992 | /* Handle actions on specific messages, except for the force delivery and |
3993 | message load actions, which are done below. Some actions take a whole list of | |
3994 | message ids, which are known to continue up to the end of the arguments. Others | |
3995 | take a single message id and then operate on the recipients list. */ | |
059ec3d9 | 3996 | |
0ef732d9 | 3997 | if (msg_action_arg > 0 && msg_action != MSG_DELIVER && msg_action != MSG_LOAD) |
059ec3d9 PH |
3998 | { |
3999 | int yield = EXIT_SUCCESS; | |
4000 | set_process_info("acting on specified messages"); | |
4001 | ||
4002 | if (!one_msg_action) | |
4003 | { | |
4004 | for (i = msg_action_arg; i < argc; i++) | |
4005 | if (!queue_action(argv[i], msg_action, NULL, 0, 0)) | |
4006 | yield = EXIT_FAILURE; | |
4007 | } | |
4008 | ||
4009 | else if (!queue_action(argv[msg_action_arg], msg_action, argv, argc, | |
4010 | recipients_arg)) yield = EXIT_FAILURE; | |
4011 | exit(yield); | |
4012 | } | |
4013 | ||
4014 | /* All the modes below here require the remaining configuration sections | |
4015 | to be read, except that we can skip over the ACL setting when delivering | |
4016 | specific messages, or doing a queue run. (For various testing cases we could | |
4017 | skip too, but as they are rare, it doesn't really matter.) The argument is TRUE | |
4018 | for skipping. */ | |
4019 | ||
4020 | readconf_rest(msg_action_arg > 0 || (queue_interval == 0 && !daemon_listen)); | |
4021 | ||
4022 | /* The configuration data will have been read into POOL_PERM because we won't | |
4023 | ever want to reset back past it. Change the current pool to POOL_MAIN. In fact, | |
4024 | this is just a bit of pedantic tidiness. It wouldn't really matter if the | |
4025 | configuration were read into POOL_MAIN, because we don't do any resets till | |
4026 | later on. However, it seems right, and it does ensure that both pools get used. | |
4027 | */ | |
4028 | ||
4029 | store_pool = POOL_MAIN; | |
4030 | ||
4031 | /* Handle the -brt option. This is for checking out retry configurations. | |
4032 | The next three arguments are a domain name or a complete address, and | |
4033 | optionally two error numbers. All it does is to call the function that | |
4034 | scans the retry configuration data. */ | |
4035 | ||
4036 | if (test_retry_arg >= 0) | |
4037 | { | |
4038 | retry_config *yield; | |
4039 | int basic_errno = 0; | |
4040 | int more_errno = 0; | |
4041 | uschar *s1, *s2; | |
4042 | ||
4043 | if (test_retry_arg >= argc) | |
4044 | { | |
4045 | printf("-brt needs a domain or address argument\n"); | |
4046 | exim_exit(EXIT_FAILURE); | |
4047 | } | |
4048 | s1 = argv[test_retry_arg++]; | |
4049 | s2 = NULL; | |
4050 | ||
4051 | /* If the first argument contains no @ and no . it might be a local user | |
4052 | or it might be a single-component name. Treat as a domain. */ | |
4053 | ||
4054 | if (Ustrchr(s1, '@') == NULL && Ustrchr(s1, '.') == NULL) | |
4055 | { | |
4056 | printf("Warning: \"%s\" contains no '@' and no '.' characters. It is " | |
4057 | "being \ntreated as a one-component domain, not as a local part.\n\n", | |
4058 | s1); | |
4059 | } | |
4060 | ||
4061 | /* There may be an optional second domain arg. */ | |
4062 | ||
4063 | if (test_retry_arg < argc && Ustrchr(argv[test_retry_arg], '.') != NULL) | |
4064 | s2 = argv[test_retry_arg++]; | |
4065 | ||
4066 | /* The final arg is an error name */ | |
4067 | ||
4068 | if (test_retry_arg < argc) | |
4069 | { | |
4070 | uschar *ss = argv[test_retry_arg]; | |
4071 | uschar *error = | |
4072 | readconf_retry_error(ss, ss + Ustrlen(ss), &basic_errno, &more_errno); | |
4073 | if (error != NULL) | |
4074 | { | |
4075 | printf("%s\n", CS error); | |
4076 | return EXIT_FAILURE; | |
4077 | } | |
4078 | ||
e97957bc PH |
4079 | /* For the {MAIL,RCPT,DATA}_4xx errors, a value of 255 means "any", and a |
4080 | code > 100 as an error is for matching codes to the decade. Turn them into | |
4081 | a real error code, off the decade. */ | |
059ec3d9 | 4082 | |
e97957bc PH |
4083 | if (basic_errno == ERRNO_MAIL4XX || |
4084 | basic_errno == ERRNO_RCPT4XX || | |
4085 | basic_errno == ERRNO_DATA4XX) | |
059ec3d9 PH |
4086 | { |
4087 | int code = (more_errno >> 8) & 255; | |
4088 | if (code == 255) | |
4089 | more_errno = (more_errno & 0xffff00ff) | (21 << 8); | |
4090 | else if (code > 100) | |
4091 | more_errno = (more_errno & 0xffff00ff) | ((code - 96) << 8); | |
4092 | } | |
4093 | } | |
4094 | ||
4095 | yield = retry_find_config(s1, s2, basic_errno, more_errno); | |
4096 | if (yield == NULL) printf("No retry information found\n"); else | |
4097 | { | |
4098 | retry_rule *r; | |
4099 | more_errno = yield->more_errno; | |
4100 | printf("Retry rule: %s ", yield->pattern); | |
4101 | ||
4102 | if (yield->basic_errno == ERRNO_EXIMQUOTA) | |
4103 | { | |
4104 | printf("quota%s%s ", | |
4105 | (more_errno > 0)? "_" : "", | |
4106 | (more_errno > 0)? readconf_printtime(more_errno) : US""); | |
4107 | } | |
4108 | else if (yield->basic_errno == ECONNREFUSED) | |
4109 | { | |
4110 | printf("refused%s%s ", | |
4111 | (more_errno > 0)? "_" : "", | |
4112 | (more_errno == 'M')? "MX" : | |
4113 | (more_errno == 'A')? "A" : ""); | |
4114 | } | |
4115 | else if (yield->basic_errno == ETIMEDOUT) | |
4116 | { | |
4117 | printf("timeout"); | |
4118 | if ((more_errno & RTEF_CTOUT) != 0) printf("_connect"); | |
4119 | more_errno &= 255; | |
4120 | if (more_errno != 0) printf("_%s", | |
4121 | (more_errno == 'M')? "MX" : "A"); | |
4122 | printf(" "); | |
4123 | } | |
4124 | else if (yield->basic_errno == ERRNO_AUTHFAIL) | |
4125 | printf("auth_failed "); | |
4126 | else printf("* "); | |
4127 | ||
4128 | for (r = yield->rules; r != NULL; r = r->next) | |
4129 | { | |
4130 | printf("%c,%s", r->rule, readconf_printtime(r->timeout)); /* Do not */ | |
4131 | printf(",%s", readconf_printtime(r->p1)); /* amalgamate */ | |
4132 | if (r->rule == 'G') | |
4133 | { | |
4134 | int x = r->p2; | |
4135 | int f = x % 1000; | |
4136 | int d = 100; | |
4137 | printf(",%d.", x/1000); | |
4138 | do | |
4139 | { | |
4140 | printf("%d", f/d); | |
4141 | f %= d; | |
4142 | d /= 10; | |
4143 | } | |
4144 | while (f != 0); | |
4145 | } | |
4146 | printf("; "); | |
4147 | } | |
4148 | ||
4149 | printf("\n"); | |
4150 | } | |
4151 | exim_exit(EXIT_SUCCESS); | |
4152 | } | |
4153 | ||
4154 | /* Handle a request to list one or more configuration options */ | |
4155 | ||
4156 | if (list_options) | |
4157 | { | |
4158 | set_process_info("listing variables"); | |
4159 | if (recipients_arg >= argc) readconf_print(US"all", NULL); | |
4160 | else for (i = recipients_arg; i < argc; i++) | |
4161 | { | |
4162 | if (i < argc - 1 && | |
4163 | (Ustrcmp(argv[i], "router") == 0 || | |
4164 | Ustrcmp(argv[i], "transport") == 0 || | |
5d9c27ec TK |
4165 | Ustrcmp(argv[i], "authenticator") == 0 || |
4166 | Ustrcmp(argv[i], "macro") == 0)) | |
059ec3d9 PH |
4167 | { |
4168 | readconf_print(argv[i+1], argv[i]); | |
4169 | i++; | |
4170 | } | |
4171 | else readconf_print(argv[i], NULL); | |
4172 | } | |
4173 | exim_exit(EXIT_SUCCESS); | |
4174 | } | |
4175 | ||
4176 | ||
4177 | /* Handle a request to deliver one or more messages that are already on the | |
0ef732d9 PH |
4178 | queue. Values of msg_action other than MSG_DELIVER and MSG_LOAD are dealt with |
4179 | above. MSG_LOAD is handled with -be (which is the only time it applies) below. | |
4180 | ||
4181 | Delivery of specific messages is typically used for a small number when | |
4182 | prodding by hand (when the option forced_delivery will be set) or when | |
4183 | re-execing to regain root privilege. Each message delivery must happen in a | |
4184 | separate process, so we fork a process for each one, and run them sequentially | |
4185 | so that debugging output doesn't get intertwined, and to avoid spawning too | |
4186 | many processes if a long list is given. However, don't fork for the last one; | |
4187 | this saves a process in the common case when Exim is called to deliver just one | |
4188 | message. */ | |
4189 | ||
4190 | if (msg_action_arg > 0 && msg_action != MSG_LOAD) | |
059ec3d9 PH |
4191 | { |
4192 | if (prod_requires_admin && !admin_user) | |
4193 | { | |
4194 | fprintf(stderr, "exim: Permission denied\n"); | |
4195 | exim_exit(EXIT_FAILURE); | |
4196 | } | |
4197 | set_process_info("delivering specified messages"); | |
4198 | if (deliver_give_up) forced_delivery = deliver_force_thaw = TRUE; | |
4199 | for (i = msg_action_arg; i < argc; i++) | |
4200 | { | |
4201 | int status; | |
4202 | pid_t pid; | |
4203 | if (i == argc - 1) | |
4204 | (void)deliver_message(argv[i], forced_delivery, deliver_give_up); | |
4205 | else if ((pid = fork()) == 0) | |
4206 | { | |
4207 | (void)deliver_message(argv[i], forced_delivery, deliver_give_up); | |
4208 | _exit(EXIT_SUCCESS); | |
4209 | } | |
4210 | else if (pid < 0) | |
4211 | { | |
4212 | fprintf(stderr, "failed to fork delivery process for %s: %s\n", argv[i], | |
4213 | strerror(errno)); | |
4214 | exim_exit(EXIT_FAILURE); | |
4215 | } | |
4216 | else wait(&status); | |
4217 | } | |
4218 | exim_exit(EXIT_SUCCESS); | |
4219 | } | |
4220 | ||
4221 | ||
4222 | /* If only a single queue run is requested, without SMTP listening, we can just | |
4223 | turn into a queue runner, with an optional starting message id. */ | |
4224 | ||
4225 | if (queue_interval == 0 && !daemon_listen) | |
4226 | { | |
4227 | DEBUG(D_queue_run) debug_printf("Single queue run%s%s%s%s\n", | |
4228 | (start_queue_run_id == NULL)? US"" : US" starting at ", | |
4229 | (start_queue_run_id == NULL)? US"" : start_queue_run_id, | |
4230 | (stop_queue_run_id == NULL)? US"" : US" stopping at ", | |
4231 | (stop_queue_run_id == NULL)? US"" : stop_queue_run_id); | |
4232 | set_process_info("running the queue (single queue run)"); | |
4233 | queue_run(start_queue_run_id, stop_queue_run_id, FALSE); | |
4234 | exim_exit(EXIT_SUCCESS); | |
4235 | } | |
4236 | ||
4237 | ||
4238 | /* Find the login name of the real user running this process. This is always | |
4239 | needed when receiving a message, because it is written into the spool file. It | |
4240 | may also be used to construct a from: or a sender: header, and in this case we | |
4241 | need the user's full name as well, so save a copy of it, checked for RFC822 | |
4242 | syntax and munged if necessary, if it hasn't previously been set by the -F | |
4243 | argument. We may try to get the passwd entry more than once, in case NIS or | |
4244 | other delays are in evidence. Save the home directory for use in filter testing | |
4245 | (only). */ | |
4246 | ||
4247 | for (i = 0;;) | |
4248 | { | |
4249 | if ((pw = getpwuid(real_uid)) != NULL) | |
4250 | { | |
4251 | originator_login = string_copy(US pw->pw_name); | |
4252 | originator_home = string_copy(US pw->pw_dir); | |
4253 | ||
4254 | /* If user name has not been set by -F, set it from the passwd entry | |
4255 | unless -f has been used to set the sender address by a trusted user. */ | |
4256 | ||
4257 | if (originator_name == NULL) | |
4258 | { | |
4259 | if (sender_address == NULL || | |
f05da2e8 | 4260 | (!trusted_caller && filter_test == FTEST_NONE)) |
059ec3d9 PH |
4261 | { |
4262 | uschar *name = US pw->pw_gecos; | |
4263 | uschar *amp = Ustrchr(name, '&'); | |
4264 | uschar buffer[256]; | |
4265 | ||
4266 | /* Most Unix specify that a '&' character in the gecos field is | |
4267 | replaced by a copy of the login name, and some even specify that | |
4268 | the first character should be upper cased, so that's what we do. */ | |
4269 | ||
4270 | if (amp != NULL) | |
4271 | { | |
4272 | int loffset; | |
4273 | string_format(buffer, sizeof(buffer), "%.*s%n%s%s", | |
4274 | amp - name, name, &loffset, originator_login, amp + 1); | |
4275 | buffer[loffset] = toupper(buffer[loffset]); | |
4276 | name = buffer; | |
4277 | } | |
4278 | ||
4279 | /* If a pattern for matching the gecos field was supplied, apply | |
4280 | it and then expand the name string. */ | |
4281 | ||
4282 | if (gecos_pattern != NULL && gecos_name != NULL) | |
4283 | { | |
4284 | const pcre *re; | |
4285 | re = regex_must_compile(gecos_pattern, FALSE, TRUE); /* Use malloc */ | |
4286 | ||
4287 | if (regex_match_and_setup(re, name, 0, -1)) | |
4288 | { | |
4289 | uschar *new_name = expand_string(gecos_name); | |
4290 | expand_nmax = -1; | |
4291 | if (new_name != NULL) | |
4292 | { | |
4293 | DEBUG(D_receive) debug_printf("user name \"%s\" extracted from " | |
4294 | "gecos field \"%s\"\n", new_name, name); | |
4295 | name = new_name; | |
4296 | } | |
4297 | else DEBUG(D_receive) debug_printf("failed to expand gecos_name string " | |
4298 | "\"%s\": %s\n", gecos_name, expand_string_message); | |
4299 | } | |
4300 | else DEBUG(D_receive) debug_printf("gecos_pattern \"%s\" did not match " | |
4301 | "gecos field \"%s\"\n", gecos_pattern, name); | |
4302 | store_free((void *)re); | |
4303 | } | |
4304 | originator_name = string_copy(name); | |
4305 | } | |
4306 | ||
4307 | /* A trusted caller has used -f but not -F */ | |
4308 | ||
4309 | else originator_name = US""; | |
4310 | } | |
4311 | ||
4312 | /* Break the retry loop */ | |
4313 | ||
4314 | break; | |
4315 | } | |
4316 | ||
4317 | if (++i > finduser_retries) break; | |
4318 | sleep(1); | |
4319 | } | |
4320 | ||
4321 | /* If we cannot get a user login, log the incident and give up, unless the | |
4322 | configuration specifies something to use. When running in the test harness, | |
8800895a | 4323 | any setting of unknown_login overrides the actual name. */ |
059ec3d9 PH |
4324 | |
4325 | if (originator_login == NULL || running_in_test_harness) | |
4326 | { | |
4327 | if (unknown_login != NULL) | |
4328 | { | |
4329 | originator_login = expand_string(unknown_login); | |
4330 | if (originator_name == NULL && unknown_username != NULL) | |
4331 | originator_name = expand_string(unknown_username); | |
4332 | if (originator_name == NULL) originator_name = US""; | |
4333 | } | |
4334 | if (originator_login == NULL) | |
4335 | log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Failed to get user name for uid %d", | |
4336 | (int)real_uid); | |
4337 | } | |
4338 | ||
4339 | /* Ensure that the user name is in a suitable form for use as a "phrase" in an | |
4340 | RFC822 address.*/ | |
4341 | ||
4342 | originator_name = string_copy(parse_fix_phrase(originator_name, | |
4343 | Ustrlen(originator_name), big_buffer, big_buffer_size)); | |
4344 | ||
4345 | /* If a message is created by this call of Exim, the uid/gid of its originator | |
4346 | are those of the caller. These values are overridden if an existing message is | |
4347 | read in from the spool. */ | |
4348 | ||
4349 | originator_uid = real_uid; | |
4350 | originator_gid = real_gid; | |
4351 | ||
4352 | DEBUG(D_receive) debug_printf("originator: uid=%d gid=%d login=%s name=%s\n", | |
4353 | (int)originator_uid, (int)originator_gid, originator_login, originator_name); | |
4354 | ||
4355 | /* Run in daemon and/or queue-running mode. The function daemon_go() never | |
4356 | returns. We leave this till here so that the originator_ fields are available | |
47c7a64a PH |
4357 | for incoming messages via the daemon. The daemon cannot be run in mua_wrapper |
4358 | mode. */ | |
059ec3d9 PH |
4359 | |
4360 | if (daemon_listen || queue_interval > 0) | |
4361 | { | |
47c7a64a PH |
4362 | if (mua_wrapper) |
4363 | { | |
4364 | fprintf(stderr, "Daemon cannot be run when mua_wrapper is set\n"); | |
4365 | log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Daemon cannot be run when " | |
4366 | "mua_wrapper is set"); | |
4367 | } | |
059ec3d9 PH |
4368 | daemon_go(); |
4369 | } | |
4370 | ||
4371 | /* If the sender ident has not been set (by a trusted caller) set it to | |
4372 | the caller. This will get overwritten below for an inetd call. If a trusted | |
4373 | caller has set it empty, unset it. */ | |
4374 | ||
4375 | if (sender_ident == NULL) sender_ident = originator_login; | |
4376 | else if (sender_ident[0] == 0) sender_ident = NULL; | |
4377 | ||
4378 | /* Handle the -brw option, which is for checking out rewriting rules. Cause log | |
4379 | writes (on errors) to go to stderr instead. Can't do this earlier, as want the | |
4380 | originator_* variables set. */ | |
4381 | ||
4382 | if (test_rewrite_arg >= 0) | |
4383 | { | |
4384 | really_exim = FALSE; | |
4385 | if (test_rewrite_arg >= argc) | |
4386 | { | |
4387 | printf("-brw needs an address argument\n"); | |
4388 | exim_exit(EXIT_FAILURE); | |
4389 | } | |
4390 | rewrite_test(argv[test_rewrite_arg]); | |
4391 | exim_exit(EXIT_SUCCESS); | |
4392 | } | |
4393 | ||
4394 | /* A locally-supplied message is considered to be coming from a local user | |
4395 | unless a trusted caller supplies a sender address with -f, or is passing in the | |
4396 | message via SMTP (inetd invocation or otherwise). */ | |
4397 | ||
4398 | if ((sender_address == NULL && !smtp_input) || | |
f05da2e8 | 4399 | (!trusted_caller && filter_test == FTEST_NONE)) |
059ec3d9 PH |
4400 | { |
4401 | sender_local = TRUE; | |
4402 | ||
4403 | /* A trusted caller can supply authenticated_sender and authenticated_id | |
33d73e3b PH |
4404 | via -oMas and -oMai and if so, they will already be set. Otherwise, force |
4405 | defaults except when host checking. */ | |
059ec3d9 | 4406 | |
33d73e3b | 4407 | if (authenticated_sender == NULL && !host_checking) |
059ec3d9 PH |
4408 | authenticated_sender = string_sprintf("%s@%s", originator_login, |
4409 | qualify_domain_sender); | |
33d73e3b PH |
4410 | if (authenticated_id == NULL && !host_checking) |
4411 | authenticated_id = originator_login; | |
059ec3d9 PH |
4412 | } |
4413 | ||
4414 | /* Trusted callers are always permitted to specify the sender address. | |
4415 | Untrusted callers may specify it if it matches untrusted_set_sender, or if what | |
4416 | is specified is the empty address. However, if a trusted caller does not | |
4417 | specify a sender address for SMTP input, we leave sender_address unset. This | |
4418 | causes the MAIL commands to be honoured. */ | |
4419 | ||
4420 | if ((!smtp_input && sender_address == NULL) || | |
4421 | !receive_check_set_sender(sender_address)) | |
4422 | { | |
4423 | /* Either the caller is not permitted to set a general sender, or this is | |
4424 | non-SMTP input and the trusted caller has not set a sender. If there is no | |
4425 | sender, or if a sender other than <> is set, override with the originator's | |
4426 | login (which will get qualified below), except when checking things. */ | |
4427 | ||
4428 | if (sender_address == NULL /* No sender_address set */ | |
4429 | || /* OR */ | |
4430 | (sender_address[0] != 0 && /* Non-empty sender address, AND */ | |
4431 | !checking && /* Not running tests, AND */ | |
f05da2e8 | 4432 | filter_test == FTEST_NONE)) /* Not testing a filter */ |
059ec3d9 PH |
4433 | { |
4434 | sender_address = originator_login; | |
4435 | sender_address_forced = FALSE; | |
4436 | sender_address_domain = 0; | |
4437 | } | |
4438 | } | |
4439 | ||
4440 | /* Remember whether an untrusted caller set the sender address */ | |
4441 | ||
4442 | sender_set_untrusted = sender_address != originator_login && !trusted_caller; | |
4443 | ||
4444 | /* Ensure that the sender address is fully qualified unless it is the empty | |
4445 | address, which indicates an error message, or doesn't exist (root caller, smtp | |
4446 | interface, no -f argument). */ | |
4447 | ||
4448 | if (sender_address != NULL && sender_address[0] != 0 && | |
4449 | sender_address_domain == 0) | |
4450 | sender_address = string_sprintf("%s@%s", local_part_quote(sender_address), | |
4451 | qualify_domain_sender); | |
4452 | ||
4453 | DEBUG(D_receive) debug_printf("sender address = %s\n", sender_address); | |
4454 | ||
4455 | /* Handle a request to verify a list of addresses, or test them for delivery. | |
4456 | This must follow the setting of the sender address, since routers can be | |
4457 | predicated upon the sender. If no arguments are given, read addresses from | |
4458 | stdin. Set debug_level to at least D_v to get full output for address testing. | |
4459 | */ | |
4460 | ||
4461 | if (verify_address_mode || address_test_mode) | |
4462 | { | |
4463 | int exit_value = 0; | |
4464 | int flags = vopt_qualify; | |
4465 | ||
4466 | if (verify_address_mode) | |
4467 | { | |
4468 | if (!verify_as_sender) flags |= vopt_is_recipient; | |
4469 | DEBUG(D_verify) debug_print_ids(US"Verifying:"); | |
4470 | } | |
4471 | ||
4472 | else | |
4473 | { | |
4474 | flags |= vopt_is_recipient; | |
4475 | debug_selector |= D_v; | |
4476 | debug_file = stderr; | |
4477 | debug_fd = fileno(debug_file); | |
4478 | DEBUG(D_verify) debug_print_ids(US"Address testing:"); | |
4479 | } | |
4480 | ||
4481 | if (recipients_arg < argc) | |
4482 | { | |
4483 | while (recipients_arg < argc) | |
4484 | { | |
4485 | uschar *s = argv[recipients_arg++]; | |
4486 | while (*s != 0) | |
4487 | { | |
4488 | BOOL finished = FALSE; | |
4489 | uschar *ss = parse_find_address_end(s, FALSE); | |
4490 | if (*ss == ',') *ss = 0; else finished = TRUE; | |
4491 | test_address(s, flags, &exit_value); | |
4492 | s = ss; | |
4493 | if (!finished) | |
4494 | while (*(++s) != 0 && (*s == ',' || isspace(*s))); | |
4495 | } | |
4496 | } | |
4497 | } | |
4498 | ||
4499 | else for (;;) | |
4500 | { | |
4501 | uschar *s = get_stdinput(NULL, NULL); | |
4502 | if (s == NULL) break; | |
4503 | test_address(s, flags, &exit_value); | |
4504 | } | |
4505 | ||
4506 | route_tidyup(); | |
4507 | exim_exit(exit_value); | |
4508 | } | |
4509 | ||
0ef732d9 PH |
4510 | /* Handle expansion checking. Either expand items on the command line, or read |
4511 | from stdin if there aren't any. If -Mset was specified, load the message so | |
328895cc PH |
4512 | that its variables can be used, but restrict this facility to admin users. |
4513 | Otherwise, if -bem was used, read a message from stdin. */ | |
059ec3d9 PH |
4514 | |
4515 | if (expansion_test) | |
4516 | { | |
0ef732d9 PH |
4517 | if (msg_action_arg > 0 && msg_action == MSG_LOAD) |
4518 | { | |
4519 | uschar spoolname[256]; /* Not big_buffer; used in spool_read_header() */ | |
4520 | if (!admin_user) | |
4521 | { | |
4522 | fprintf(stderr, "exim: permission denied\n"); | |
4523 | exit(EXIT_FAILURE); | |
4524 | } | |
4525 | message_id = argv[msg_action_arg]; | |
4526 | (void)string_format(spoolname, sizeof(spoolname), "%s-H", message_id); | |
4527 | if (!spool_open_datafile(message_id)) | |
4528 | printf ("Failed to load message datafile %s\n", message_id); | |
4529 | if (spool_read_header(spoolname, TRUE, FALSE) != spool_read_OK) | |
4530 | printf ("Failed to load message %s\n", message_id); | |
4531 | } | |
4532 | ||
328895cc PH |
4533 | /* Read a test message from a file. We fudge it up to be on stdin, saving |
4534 | stdin itself for later reading of expansion strings. */ | |
4535 | ||
4536 | else if (expansion_test_message != NULL) | |
4537 | { | |
4538 | int save_stdin = dup(0); | |
4539 | int fd = Uopen(expansion_test_message, O_RDONLY, 0); | |
4540 | if (fd < 0) | |
4541 | { | |
4542 | fprintf(stderr, "exim: failed to open %s: %s\n", expansion_test_message, | |
4543 | strerror(errno)); | |
4544 | return EXIT_FAILURE; | |
4545 | } | |
4546 | (void) dup2(fd, 0); | |
4547 | filter_test = FTEST_USER; /* Fudge to make it look like filter test */ | |
4548 | message_ended = END_NOTENDED; | |
4549 | read_message_body(receive_msg(extract_recipients)); | |
2d2b05f4 | 4550 | message_linecount += body_linecount; |
328895cc PH |
4551 | (void)dup2(save_stdin, 0); |
4552 | (void)close(save_stdin); | |
935ff400 | 4553 | clearerr(stdin); /* Required by Darwin */ |
328895cc PH |
4554 | } |
4555 | ||
4556 | /* Allow $recipients for this testing */ | |
4557 | ||
4558 | enable_dollar_recipients = TRUE; | |
4559 | ||
0ef732d9 PH |
4560 | /* Expand command line items */ |
4561 | ||
059ec3d9 PH |
4562 | if (recipients_arg < argc) |
4563 | { | |
4564 | while (recipients_arg < argc) | |
4565 | { | |
4566 | uschar *s = argv[recipients_arg++]; | |
4567 | uschar *ss = expand_string(s); | |
0ef732d9 | 4568 | if (ss == NULL) printf ("Failed: %s\n", expand_string_message); |
059ec3d9 PH |
4569 | else printf("%s\n", CS ss); |
4570 | } | |
4571 | } | |
4572 | ||
4573 | /* Read stdin */ | |
4574 | ||
4575 | else | |
4576 | { | |
1ba28e2b PP |
4577 | char *(*fn_readline)(const char *) = NULL; |
4578 | void (*fn_addhist)(const char *) = NULL; | |
059ec3d9 PH |
4579 | |
4580 | #ifdef USE_READLINE | |
4581 | void *dlhandle = set_readline(&fn_readline, &fn_addhist); | |
4582 | #endif | |
4583 | ||
4584 | for (;;) | |
4585 | { | |
4586 | uschar *ss; | |
4587 | uschar *source = get_stdinput(fn_readline, fn_addhist); | |
4588 | if (source == NULL) break; | |
4589 | ss = expand_string(source); | |
4590 | if (ss == NULL) | |
4591 | printf ("Failed: %s\n", expand_string_message); | |
4592 | else printf("%s\n", CS ss); | |
4593 | } | |
4594 | ||
4595 | #ifdef USE_READLINE | |
4596 | if (dlhandle != NULL) dlclose(dlhandle); | |
4597 | #endif | |
4598 | } | |
4599 | ||
0ef732d9 PH |
4600 | /* The data file will be open after -Mset */ |
4601 | ||
4602 | if (deliver_datafile >= 0) | |
4603 | { | |
4604 | (void)close(deliver_datafile); | |
4605 | deliver_datafile = -1; | |
4606 | } | |
4607 | ||
059ec3d9 PH |
4608 | exim_exit(EXIT_SUCCESS); |
4609 | } | |
4610 | ||
4611 | ||
4612 | /* The active host name is normally the primary host name, but it can be varied | |
4613 | for hosts that want to play several parts at once. We need to ensure that it is | |
4614 | set for host checking, and for receiving messages. */ | |
4615 | ||
4616 | smtp_active_hostname = primary_hostname; | |
4617 | if (raw_active_hostname != NULL) | |
4618 | { | |
4619 | uschar *nah = expand_string(raw_active_hostname); | |
4620 | if (nah == NULL) | |
4621 | { | |
4622 | if (!expand_string_forcedfail) | |
4623 | log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand \"%s\" " | |
4624 | "(smtp_active_hostname): %s", raw_active_hostname, | |
4625 | expand_string_message); | |
4626 | } | |
4627 | else if (nah[0] != 0) smtp_active_hostname = nah; | |
4628 | } | |
4629 | ||
4630 | /* Handle host checking: this facility mocks up an incoming SMTP call from a | |
33d73e3b PH |
4631 | given IP address so that the blocking and relay configuration can be tested. |
4632 | Unless a sender_ident was set by -oMt, we discard it (the default is the | |
4633 | caller's login name). An RFC 1413 call is made only if we are running in the | |
4634 | test harness and an incoming interface and both ports are specified, because | |
4635 | there is no TCP/IP call to find the ident for. */ | |
059ec3d9 PH |
4636 | |
4637 | if (host_checking) | |
4638 | { | |
8e669ac1 | 4639 | int x[4]; |
6f0c9a4f | 4640 | int size; |
8e669ac1 | 4641 | |
33d73e3b PH |
4642 | if (!sender_ident_set) |
4643 | { | |
4644 | sender_ident = NULL; | |
4645 | if (running_in_test_harness && sender_host_port != 0 && | |
4646 | interface_address != NULL && interface_port != 0) | |
4647 | verify_get_ident(1413); | |
4648 | } | |
8e669ac1 | 4649 | |
6f0c9a4f PH |
4650 | /* In case the given address is a non-canonical IPv6 address, canonicize |
4651 | it. The code works for both IPv4 and IPv6, as it happens. */ | |
8e669ac1 | 4652 | |
6f0c9a4f PH |
4653 | size = host_aton(sender_host_address, x); |
4654 | sender_host_address = store_get(48); /* large enough for full IPv6 */ | |
4655 | (void)host_nmtoa(size, x, -1, sender_host_address, ':'); | |
4656 | ||
4657 | /* Now set up for testing */ | |
059ec3d9 PH |
4658 | |
4659 | host_build_sender_fullhost(); | |
4660 | smtp_input = TRUE; | |
4661 | smtp_in = stdin; | |
4662 | smtp_out = stdout; | |
4663 | sender_local = FALSE; | |
4664 | sender_host_notsocket = TRUE; | |
4665 | debug_file = stderr; | |
4666 | debug_fd = fileno(debug_file); | |
4667 | fprintf(stdout, "\n**** SMTP testing session as if from host %s\n" | |
4668 | "**** but without any ident (RFC 1413) callback.\n" | |
4669 | "**** This is not for real!\n\n", | |
4670 | sender_host_address); | |
4671 | ||
4672 | if (verify_check_host(&hosts_connection_nolog) == OK) | |
4673 | log_write_selector &= ~L_smtp_connection; | |
4674 | log_write(L_smtp_connection, LOG_MAIN, "%s", smtp_get_connection_info()); | |
4675 | ||
24796b8d PH |
4676 | /* NOTE: We do *not* call smtp_log_no_mail() if smtp_start_session() fails, |
4677 | because a log line has already been written for all its failure exists | |
4678 | (usually "connection refused: <reason>") and writing another one is | |
4679 | unnecessary clutter. */ | |
4680 | ||
059ec3d9 PH |
4681 | if (smtp_start_session()) |
4682 | { | |
4683 | reset_point = store_get(0); | |
4684 | for (;;) | |
4685 | { | |
4686 | store_reset(reset_point); | |
4687 | if (smtp_setup_msg() <= 0) break; | |
4688 | if (!receive_msg(FALSE)) break; | |
4689 | } | |
24796b8d | 4690 | smtp_log_no_mail(); |
059ec3d9 PH |
4691 | } |
4692 | exim_exit(EXIT_SUCCESS); | |
4693 | } | |
4694 | ||
4695 | ||
4696 | /* Arrange for message reception if recipients or SMTP were specified; | |
4697 | otherwise complain unless a version print (-bV) happened or this is a filter | |
4698 | verification test. In the former case, show the configuration file name. */ | |
4699 | ||
4700 | if (recipients_arg >= argc && !extract_recipients && !smtp_input) | |
4701 | { | |
4702 | if (version_printed) | |
4703 | { | |
4704 | printf("Configuration file is %s\n", config_main_filename); | |
4705 | return EXIT_SUCCESS; | |
4706 | } | |
81ea09ca | 4707 | |
f05da2e8 | 4708 | if (filter_test == FTEST_NONE) |
81ea09ca | 4709 | exim_usage(called_as); |
059ec3d9 PH |
4710 | } |
4711 | ||
4712 | ||
4713 | /* If mua_wrapper is set, Exim is being used to turn an MUA that submits on the | |
4714 | standard input into an MUA that submits to a smarthost over TCP/IP. We know | |
4715 | that we are not called from inetd, because that is rejected above. The | |
4716 | following configuration settings are forced here: | |
4717 | ||
4718 | (1) Synchronous delivery (-odi) | |
4719 | (2) Errors to stderr (-oep == -oeq) | |
4720 | (3) No parallel remote delivery | |
4721 | (4) Unprivileged delivery | |
4722 | ||
4723 | We don't force overall queueing options because there are several of them; | |
4724 | instead, queueing is avoided below when mua_wrapper is set. However, we do need | |
4725 | to override any SMTP queueing. */ | |
4726 | ||
4727 | if (mua_wrapper) | |
4728 | { | |
4729 | synchronous_delivery = TRUE; | |
4730 | arg_error_handling = ERRORS_STDERR; | |
4731 | remote_max_parallel = 1; | |
4732 | deliver_drop_privilege = TRUE; | |
4733 | queue_smtp = FALSE; | |
4734 | queue_smtp_domains = NULL; | |
4735 | } | |
4736 | ||
4737 | ||
4738 | /* Prepare to accept one or more new messages on the standard input. When a | |
4739 | message has been read, its id is returned in message_id[]. If doing immediate | |
4740 | delivery, we fork a delivery process for each received message, except for the | |
4741 | last one, where we can save a process switch. | |
4742 | ||
4743 | It is only in non-smtp mode that error_handling is allowed to be changed from | |
4744 | its default of ERRORS_SENDER by argument. (Idle thought: are any of the | |
4745 | sendmail error modes other than -oem ever actually used? Later: yes.) */ | |
4746 | ||
4747 | if (!smtp_input) error_handling = arg_error_handling; | |
4748 | ||
4749 | /* If this is an inetd call, ensure that stderr is closed to prevent panic | |
4750 | logging being sent down the socket and make an identd call to get the | |
4751 | sender_ident. */ | |
4752 | ||
4753 | else if (is_inetd) | |
4754 | { | |
1fe64dcc | 4755 | (void)fclose(stderr); |
059ec3d9 PH |
4756 | exim_nullstd(); /* Re-open to /dev/null */ |
4757 | verify_get_ident(IDENT_PORT); | |
4758 | host_build_sender_fullhost(); | |
4759 | set_process_info("handling incoming connection from %s via inetd", | |
4760 | sender_fullhost); | |
4761 | } | |
4762 | ||
4763 | /* If the sender host address has been set, build sender_fullhost if it hasn't | |
4764 | already been done (which it will have been for inetd). This caters for the | |
4765 | case when it is forced by -oMa. However, we must flag that it isn't a socket, | |
4766 | so that the test for IP options is skipped for -bs input. */ | |
4767 | ||
4768 | if (sender_host_address != NULL && sender_fullhost == NULL) | |
4769 | { | |
4770 | host_build_sender_fullhost(); | |
4771 | set_process_info("handling incoming connection from %s via -oMa", | |
4772 | sender_fullhost); | |
4773 | sender_host_notsocket = TRUE; | |
4774 | } | |
4775 | ||
4776 | /* Otherwise, set the sender host as unknown except for inetd calls. This | |
4777 | prevents host checking in the case of -bs not from inetd and also for -bS. */ | |
4778 | ||
4779 | else if (!is_inetd) sender_host_unknown = TRUE; | |
4780 | ||
4781 | /* If stdout does not exist, then dup stdin to stdout. This can happen | |
4782 | if exim is started from inetd. In this case fd 0 will be set to the socket, | |
4783 | but fd 1 will not be set. This also happens for passed SMTP channels. */ | |
4784 | ||
1fe64dcc | 4785 | if (fstat(1, &statbuf) < 0) (void)dup2(0, 1); |
059ec3d9 | 4786 | |
273f34d0 PH |
4787 | /* Set up the incoming protocol name and the state of the program. Root is |
4788 | allowed to force received protocol via the -oMr option above. If we have come | |
4789 | via inetd, the process info has already been set up. We don't set | |
4790 | received_protocol here for smtp input, as it varies according to | |
4791 | batch/HELO/EHLO/AUTH/TLS. */ | |
059ec3d9 PH |
4792 | |
4793 | if (smtp_input) | |
4794 | { | |
273f34d0 PH |
4795 | if (!is_inetd) set_process_info("accepting a local %sSMTP message from <%s>", |
4796 | smtp_batched_input? "batched " : "", | |
4797 | (sender_address!= NULL)? sender_address : originator_login); | |
059ec3d9 PH |
4798 | } |
4799 | else | |
4800 | { | |
4801 | if (received_protocol == NULL) | |
4802 | received_protocol = string_sprintf("local%s", called_as); | |
4803 | set_process_info("accepting a local non-SMTP message from <%s>", | |
4804 | sender_address); | |
4805 | } | |
4806 | ||
8669f003 PH |
4807 | /* Initialize the session_local_queue-only flag (this will be ignored if |
4808 | mua_wrapper is set) */ | |
059ec3d9 PH |
4809 | |
4810 | queue_check_only(); | |
8669f003 | 4811 | session_local_queue_only = queue_only; |
059ec3d9 PH |
4812 | |
4813 | /* For non-SMTP and for batched SMTP input, check that there is enough space on | |
4814 | the spool if so configured. On failure, we must not attempt to send an error | |
4815 | message! (For interactive SMTP, the check happens at MAIL FROM and an SMTP | |
4816 | error code is given.) */ | |
4817 | ||
4818 | if ((!smtp_input || smtp_batched_input) && !receive_check_fs(0)) | |
4819 | { | |
4820 | fprintf(stderr, "exim: insufficient disk space\n"); | |
4821 | return EXIT_FAILURE; | |
4822 | } | |
4823 | ||
273f34d0 PH |
4824 | /* If this is smtp input of any kind, real or batched, handle the start of the |
4825 | SMTP session. | |
24796b8d PH |
4826 | |
4827 | NOTE: We do *not* call smtp_log_no_mail() if smtp_start_session() fails, | |
4828 | because a log line has already been written for all its failure exists | |
4829 | (usually "connection refused: <reason>") and writing another one is | |
4830 | unnecessary clutter. */ | |
059ec3d9 PH |
4831 | |
4832 | if (smtp_input) | |
4833 | { | |
4834 | smtp_in = stdin; | |
4835 | smtp_out = stdout; | |
4836 | if (verify_check_host(&hosts_connection_nolog) == OK) | |
4837 | log_write_selector &= ~L_smtp_connection; | |
4838 | log_write(L_smtp_connection, LOG_MAIN, "%s", smtp_get_connection_info()); | |
4839 | if (!smtp_start_session()) | |
4840 | { | |
4841 | mac_smtp_fflush(); | |
4842 | exim_exit(EXIT_SUCCESS); | |
4843 | } | |
4844 | } | |
4845 | ||
45b91596 | 4846 | /* Otherwise, set up the input size limit here. */ |
059ec3d9 PH |
4847 | |
4848 | else | |
4849 | { | |
d45b1de8 PH |
4850 | thismessage_size_limit = expand_string_integer(message_size_limit, TRUE); |
4851 | if (expand_string_message != NULL) | |
059ec3d9 PH |
4852 | { |
4853 | if (thismessage_size_limit == -1) | |
4854 | log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand " | |
4855 | "message_size_limit: %s", expand_string_message); | |
4856 | else | |
4857 | log_write(0, LOG_MAIN|LOG_PANIC_DIE, "invalid value for " | |
4858 | "message_size_limit: %s", expand_string_message); | |
4859 | } | |
4860 | } | |
4861 | ||
4862 | /* Loop for several messages when reading SMTP input. If we fork any child | |
4863 | processes, we don't want to wait for them unless synchronous delivery is | |
4864 | requested, so set SIGCHLD to SIG_IGN in that case. This is not necessarily the | |
4865 | same as SIG_DFL, despite the fact that documentation often lists the default as | |
4866 | "ignore". This is a confusing area. This is what I know: | |
4867 | ||
4868 | At least on some systems (e.g. Solaris), just setting SIG_IGN causes child | |
4869 | processes that complete simply to go away without ever becoming defunct. You | |
4870 | can't then wait for them - but we don't want to wait for them in the | |
4871 | non-synchronous delivery case. However, this behaviour of SIG_IGN doesn't | |
4872 | happen for all OS (e.g. *BSD is different). | |
4873 | ||
4874 | But that's not the end of the story. Some (many? all?) systems have the | |
4875 | SA_NOCLDWAIT option for sigaction(). This requests the behaviour that Solaris | |
4876 | has by default, so it seems that the difference is merely one of default | |
4877 | (compare restarting vs non-restarting signals). | |
4878 | ||
4879 | To cover all cases, Exim sets SIG_IGN with SA_NOCLDWAIT here if it can. If not, | |
4880 | it just sets SIG_IGN. To be on the safe side it also calls waitpid() at the end | |
4881 | of the loop below. Paranoia rules. | |
4882 | ||
4883 | February 2003: That's *still* not the end of the story. There are now versions | |
4884 | of Linux (where SIG_IGN does work) that are picky. If, having set SIG_IGN, a | |
4885 | process then calls waitpid(), a grumble is written to the system log, because | |
4886 | this is logically inconsistent. In other words, it doesn't like the paranoia. | |
4887 | As a consequenc of this, the waitpid() below is now excluded if we are sure | |
4888 | that SIG_IGN works. */ | |
4889 | ||
4890 | if (!synchronous_delivery) | |
4891 | { | |
4892 | #ifdef SA_NOCLDWAIT | |
4893 | struct sigaction act; | |
4894 | act.sa_handler = SIG_IGN; | |
4895 | sigemptyset(&(act.sa_mask)); | |
4896 | act.sa_flags = SA_NOCLDWAIT; | |
4897 | sigaction(SIGCHLD, &act, NULL); | |
4898 | #else | |
4899 | signal(SIGCHLD, SIG_IGN); | |
4900 | #endif | |
4901 | } | |
4902 | ||
4903 | /* Save the current store pool point, for resetting at the start of | |
4904 | each message, and save the real sender address, if any. */ | |
4905 | ||
4906 | reset_point = store_get(0); | |
4907 | real_sender_address = sender_address; | |
4908 | ||
4909 | /* Loop to receive messages; receive_msg() returns TRUE if there are more | |
4910 | messages to be read (SMTP input), or FALSE otherwise (not SMTP, or SMTP channel | |
4911 | collapsed). */ | |
4912 | ||
4913 | while (more) | |
4914 | { | |
4915 | store_reset(reset_point); | |
4916 | message_id[0] = 0; | |
4917 | ||
273f34d0 PH |
4918 | /* Handle the SMTP case; call smtp_setup_mst() to deal with the initial SMTP |
4919 | input and build the recipients list, before calling receive_msg() to read the | |
4920 | message proper. Whatever sender address is given in the SMTP transaction is | |
4921 | often ignored for local senders - we use the actual sender, which is normally | |
4922 | either the underlying user running this process or a -f argument provided by | |
4923 | a trusted caller. It is saved in real_sender_address. The test for whether to | |
4924 | accept the SMTP sender is encapsulated in receive_check_set_sender(). */ | |
059ec3d9 PH |
4925 | |
4926 | if (smtp_input) | |
4927 | { | |
4928 | int rc; | |
4929 | if ((rc = smtp_setup_msg()) > 0) | |
4930 | { | |
4931 | if (real_sender_address != NULL && | |
4932 | !receive_check_set_sender(sender_address)) | |
4933 | { | |
4934 | sender_address = raw_sender = real_sender_address; | |
4935 | sender_address_unrewritten = NULL; | |
4936 | } | |
273f34d0 PH |
4937 | |
4938 | /* For batched SMTP, we have to run the acl_not_smtp_start ACL, since it | |
4939 | isn't really SMTP, so no other ACL will run until the acl_not_smtp one at | |
4940 | the very end. The result of the ACL is ignored (as for other non-SMTP | |
4941 | messages). It is run for its potential side effects. */ | |
4942 | ||
4943 | if (smtp_batched_input && acl_not_smtp_start != NULL) | |
4944 | { | |
4945 | uschar *user_msg, *log_msg; | |
4946 | enable_dollar_recipients = TRUE; | |
4947 | (void)acl_check(ACL_WHERE_NOTSMTP_START, NULL, acl_not_smtp_start, | |
4948 | &user_msg, &log_msg); | |
4949 | enable_dollar_recipients = FALSE; | |
4950 | } | |
4951 | ||
4952 | /* Now get the data for the message */ | |
4953 | ||
059ec3d9 PH |
4954 | more = receive_msg(extract_recipients); |
4955 | if (message_id[0] == 0) | |
4956 | { | |
4957 | if (more) continue; | |
b4ed4da0 | 4958 | smtp_log_no_mail(); /* Log no mail if configured */ |
059ec3d9 PH |
4959 | exim_exit(EXIT_FAILURE); |
4960 | } | |
4961 | } | |
b4ed4da0 PH |
4962 | else |
4963 | { | |
4964 | smtp_log_no_mail(); /* Log no mail if configured */ | |
4965 | exim_exit((rc == 0)? EXIT_SUCCESS : EXIT_FAILURE); | |
4966 | } | |
059ec3d9 PH |
4967 | } |
4968 | ||
4969 | /* In the non-SMTP case, we have all the information from the command | |
4970 | line, but must process it in case it is in the more general RFC822 | |
4971 | format, and in any case, to detect syntax errors. Also, it appears that | |
4972 | the use of comma-separated lists as single arguments is common, so we | |
4973 | had better support them. */ | |
4974 | ||
4975 | else | |
4976 | { | |
4977 | int i; | |
4978 | int rcount = 0; | |
4979 | int count = argc - recipients_arg; | |
4980 | uschar **list = argv + recipients_arg; | |
eb2c0248 | 4981 | |
69358f02 | 4982 | /* These options cannot be changed dynamically for non-SMTP messages */ |
eb2c0248 | 4983 | |
69358f02 | 4984 | active_local_sender_retain = local_sender_retain; |
eb2c0248 | 4985 | active_local_from_check = local_from_check; |
059ec3d9 PH |
4986 | |
4987 | /* Save before any rewriting */ | |
4988 | ||
4989 | raw_sender = string_copy(sender_address); | |
4990 | ||
4991 | /* Loop for each argument */ | |
4992 | ||
4993 | for (i = 0; i < count; i++) | |
4994 | { | |
4995 | int start, end, domain; | |
4996 | uschar *errmess; | |
4997 | uschar *s = list[i]; | |
4998 | ||
4999 | /* Loop for each comma-separated address */ | |
5000 | ||
5001 | while (*s != 0) | |
5002 | { | |
5003 | BOOL finished = FALSE; | |
5004 | uschar *recipient; | |
5005 | uschar *ss = parse_find_address_end(s, FALSE); | |
5006 | ||
5007 | if (*ss == ',') *ss = 0; else finished = TRUE; | |
5008 | ||
5009 | /* Check max recipients - if -t was used, these aren't recipients */ | |
5010 | ||
5011 | if (recipients_max > 0 && ++rcount > recipients_max && | |
5012 | !extract_recipients) | |
5013 | { | |
5014 | if (error_handling == ERRORS_STDERR) | |
5015 | { | |
5016 | fprintf(stderr, "exim: too many recipients\n"); | |
5017 | exim_exit(EXIT_FAILURE); | |
5018 | } | |
5019 | else | |
5020 | { | |
5021 | return | |
5022 | moan_to_sender(ERRMESS_TOOMANYRECIP, NULL, NULL, stdin, TRUE)? | |
5023 | errors_sender_rc : EXIT_FAILURE; | |
5024 | } | |
5025 | } | |
5026 | ||
5027 | recipient = | |
5028 | parse_extract_address(s, &errmess, &start, &end, &domain, FALSE); | |
5029 | ||
5030 | if (domain == 0 && !allow_unqualified_recipient) | |
5031 | { | |
5032 | recipient = NULL; | |
5033 | errmess = US"unqualified recipient address not allowed"; | |
5034 | } | |
5035 | ||
5036 | if (recipient == NULL) | |
5037 | { | |
5038 | if (error_handling == ERRORS_STDERR) | |
5039 | { | |
5040 | fprintf(stderr, "exim: bad recipient address \"%s\": %s\n", | |
5041 | string_printing(list[i]), errmess); | |
5042 | exim_exit(EXIT_FAILURE); | |
5043 | } | |
5044 | else | |
5045 | { | |
5046 | error_block eblock; | |
5047 | eblock.next = NULL; | |
5048 | eblock.text1 = string_printing(list[i]); | |
5049 | eblock.text2 = errmess; | |
5050 | return | |
5051 | moan_to_sender(ERRMESS_BADARGADDRESS, &eblock, NULL, stdin, TRUE)? | |
5052 | errors_sender_rc : EXIT_FAILURE; | |
5053 | } | |
5054 | } | |
5055 | ||
5056 | receive_add_recipient(recipient, -1); | |
5057 | s = ss; | |
5058 | if (!finished) | |
5059 | while (*(++s) != 0 && (*s == ',' || isspace(*s))); | |
5060 | } | |
5061 | } | |
5062 | ||
5063 | /* Show the recipients when debugging */ | |
5064 | ||
5065 | DEBUG(D_receive) | |
5066 | { | |
5067 | int i; | |
5068 | if (sender_address != NULL) debug_printf("Sender: %s\n", sender_address); | |
5069 | if (recipients_list != NULL) | |
5070 | { | |
5071 | debug_printf("Recipients:\n"); | |
5072 | for (i = 0; i < recipients_count; i++) | |
5073 | debug_printf(" %s\n", recipients_list[i].address); | |
5074 | } | |
5075 | } | |
5076 | ||
45b91596 PH |
5077 | /* Run the acl_not_smtp_start ACL if required. The result of the ACL is |
5078 | ignored; rejecting here would just add complication, and it can just as | |
5079 | well be done later. Allow $recipients to be visible in the ACL. */ | |
5080 | ||
5081 | if (acl_not_smtp_start != NULL) | |
5082 | { | |
5083 | uschar *user_msg, *log_msg; | |
5084 | enable_dollar_recipients = TRUE; | |
5085 | (void)acl_check(ACL_WHERE_NOTSMTP_START, NULL, acl_not_smtp_start, | |
5086 | &user_msg, &log_msg); | |
5087 | enable_dollar_recipients = FALSE; | |
5088 | } | |
5089 | ||
f05da2e8 PH |
5090 | /* Read the data for the message. If filter_test is not FTEST_NONE, this |
5091 | will just read the headers for the message, and not write anything onto the | |
5092 | spool. */ | |
059ec3d9 PH |
5093 | |
5094 | message_ended = END_NOTENDED; | |
5095 | more = receive_msg(extract_recipients); | |
5096 | ||
5097 | /* more is always FALSE here (not SMTP message) when reading a message | |
5098 | for real; when reading the headers of a message for filter testing, | |
5099 | it is TRUE if the headers were terminated by '.' and FALSE otherwise. */ | |
5100 | ||
5101 | if (message_id[0] == 0) exim_exit(EXIT_FAILURE); | |
5102 | } /* Non-SMTP message reception */ | |
5103 | ||
5104 | /* If this is a filter testing run, there are headers in store, but | |
5105 | no message on the spool. Run the filtering code in testing mode, setting | |
5106 | the domain to the qualify domain and the local part to the current user, | |
5107 | unless they have been set by options. The prefix and suffix are left unset | |
5108 | unless specified. The the return path is set to to the sender unless it has | |
5109 | already been set from a return-path header in the message. */ | |
5110 | ||
f05da2e8 | 5111 | if (filter_test != FTEST_NONE) |
059ec3d9 PH |
5112 | { |
5113 | deliver_domain = (ftest_domain != NULL)? | |
5114 | ftest_domain : qualify_domain_recipient; | |
5115 | deliver_domain_orig = deliver_domain; | |
5116 | deliver_localpart = (ftest_localpart != NULL)? | |
5117 | ftest_localpart : originator_login; | |
5118 | deliver_localpart_orig = deliver_localpart; | |
5119 | deliver_localpart_prefix = ftest_prefix; | |
5120 | deliver_localpart_suffix = ftest_suffix; | |
5121 | deliver_home = originator_home; | |
5122 | ||
5123 | if (return_path == NULL) | |
5124 | { | |
5125 | printf("Return-path copied from sender\n"); | |
5126 | return_path = string_copy(sender_address); | |
5127 | } | |
5128 | else | |
5129 | { | |
5130 | printf("Return-path = %s\n", (return_path[0] == 0)? US"<>" : return_path); | |
5131 | } | |
5132 | printf("Sender = %s\n", (sender_address[0] == 0)? US"<>" : sender_address); | |
5133 | ||
5134 | receive_add_recipient( | |
5135 | string_sprintf("%s%s%s@%s", | |
5136 | (ftest_prefix == NULL)? US"" : ftest_prefix, | |
5137 | deliver_localpart, | |
5138 | (ftest_suffix == NULL)? US"" : ftest_suffix, | |
5139 | deliver_domain), -1); | |
5140 | ||
5141 | printf("Recipient = %s\n", recipients_list[0].address); | |
5142 | if (ftest_prefix != NULL) printf("Prefix = %s\n", ftest_prefix); | |
5143 | if (ftest_suffix != NULL) printf("Suffix = %s\n", ftest_suffix); | |
5144 | ||
1fe64dcc | 5145 | (void)chdir("/"); /* Get away from wherever the user is running this from */ |
8e669ac1 PH |
5146 | |
5147 | /* Now we run either a system filter test, or a user filter test, or both. | |
5148 | In the latter case, headers added by the system filter will persist and be | |
5149 | available to the user filter. We need to copy the filter variables | |
f05da2e8 | 5150 | explicitly. */ |
8e669ac1 | 5151 | |
f05da2e8 PH |
5152 | if ((filter_test & FTEST_SYSTEM) != 0) |
5153 | { | |
5154 | if (!filter_runtest(filter_sfd, filter_test_sfile, TRUE, more)) | |
5155 | exim_exit(EXIT_FAILURE); | |
8e669ac1 PH |
5156 | } |
5157 | ||
f05da2e8 | 5158 | memcpy(filter_sn, filter_n, sizeof(filter_sn)); |
8e669ac1 | 5159 | |
f05da2e8 PH |
5160 | if ((filter_test & FTEST_USER) != 0) |
5161 | { | |
5162 | if (!filter_runtest(filter_ufd, filter_test_ufile, FALSE, more)) | |
5163 | exim_exit(EXIT_FAILURE); | |
8e669ac1 PH |
5164 | } |
5165 | ||
f05da2e8 | 5166 | exim_exit(EXIT_SUCCESS); |
059ec3d9 PH |
5167 | } |
5168 | ||
5169 | /* Else act on the result of message reception. We should not get here unless | |
8669f003 PH |
5170 | message_id[0] is non-zero. If queue_only is set, session_local_queue_only |
5171 | will be TRUE. If it is not, check on the number of messages received in this | |
5172 | connection. */ | |
5173 | ||
5174 | if (!session_local_queue_only && | |
5175 | smtp_accept_queue_per_connection > 0 && | |
5176 | receive_messagecount > smtp_accept_queue_per_connection) | |
059ec3d9 | 5177 | { |
8669f003 PH |
5178 | session_local_queue_only = TRUE; |
5179 | queue_only_reason = 2; | |
5180 | } | |
5181 | ||
5182 | /* Initialize local_queue_only from session_local_queue_only. If it is false, | |
5183 | and queue_only_load is set, check that the load average is below it. If it is | |
5184 | not, set local_queue_only TRUE. If queue_only_load_latch is true (the | |
5185 | default), we put the whole session into queue_only mode. It then remains this | |
5186 | way for any subsequent messages on the same SMTP connection. This is a | |
5187 | deliberate choice; even though the load average may fall, it doesn't seem | |
5188 | right to deliver later messages on the same call when not delivering earlier | |
5189 | ones. However, there are odd cases where this is not wanted, so this can be | |
5190 | changed by setting queue_only_load_latch false. */ | |
5191 | ||
5192 | local_queue_only = session_local_queue_only; | |
5193 | if (!local_queue_only && queue_only_load >= 0) | |
5194 | { | |
5195 | local_queue_only = (load_average = OS_GETLOADAVG()) > queue_only_load; | |
5196 | if (local_queue_only) | |
059ec3d9 | 5197 | { |
8669f003 PH |
5198 | queue_only_reason = 3; |
5199 | if (queue_only_load_latch) session_local_queue_only = TRUE; | |
059ec3d9 PH |
5200 | } |
5201 | } | |
5202 | ||
5203 | /* If running as an MUA wrapper, all queueing options and freezing options | |
5204 | are ignored. */ | |
5205 | ||
5206 | if (mua_wrapper) | |
5207 | local_queue_only = queue_only_policy = deliver_freeze = FALSE; | |
5208 | ||
5209 | /* Log the queueing here, when it will get a message id attached, but | |
5210 | not if queue_only is set (case 0). Case 1 doesn't happen here (too many | |
5211 | connections). */ | |
5212 | ||
5213 | if (local_queue_only) switch(queue_only_reason) | |
5214 | { | |
5215 | case 2: | |
5216 | log_write(L_delay_delivery, | |
5217 | LOG_MAIN, "no immediate delivery: more than %d messages " | |
5218 | "received in one connection", smtp_accept_queue_per_connection); | |
5219 | break; | |
5220 | ||
5221 | case 3: | |
5222 | log_write(L_delay_delivery, | |
5223 | LOG_MAIN, "no immediate delivery: load average %.2f", | |
5224 | (double)load_average/1000.0); | |
5225 | break; | |
5226 | } | |
5227 | ||
5228 | /* Else do the delivery unless the ACL or local_scan() called for queue only | |
5229 | or froze the message. Always deliver in a separate process. A fork failure is | |
5230 | not a disaster, as the delivery will eventually happen on a subsequent queue | |
eb2c0248 PH |
5231 | run. The search cache must be tidied before the fork, as the parent will |
5232 | do it before exiting. The child will trigger a lookup failure and | |
5233 | thereby defer the delivery if it tries to use (for example) a cached ldap | |
5234 | connection that the parent has called unbind on. */ | |
059ec3d9 PH |
5235 | |
5236 | else if (!queue_only_policy && !deliver_freeze) | |
5237 | { | |
5238 | pid_t pid; | |
eb2c0248 PH |
5239 | search_tidyup(); |
5240 | ||
059ec3d9 PH |
5241 | if ((pid = fork()) == 0) |
5242 | { | |
5243 | int rc; | |
5244 | close_unwanted(); /* Close unwanted file descriptors and TLS */ | |
5245 | exim_nullstd(); /* Ensure std{in,out,err} exist */ | |
5246 | ||
5247 | /* Re-exec Exim if we need to regain privilege (note: in mua_wrapper | |
5248 | mode, deliver_drop_privilege is forced TRUE). */ | |
5249 | ||
5250 | if (geteuid() != root_uid && !deliver_drop_privilege && !unprivileged) | |
5251 | { | |
5252 | (void)child_exec_exim(CEE_EXEC_EXIT, FALSE, NULL, FALSE, 2, US"-Mc", | |
5253 | message_id); | |
5254 | /* Control does not return here. */ | |
5255 | } | |
5256 | ||
5257 | /* No need to re-exec */ | |
5258 | ||
5259 | rc = deliver_message(message_id, FALSE, FALSE); | |
5260 | search_tidyup(); | |
5261 | _exit((!mua_wrapper || rc == DELIVER_MUA_SUCCEEDED)? | |
5262 | EXIT_SUCCESS : EXIT_FAILURE); | |
5263 | } | |
5264 | ||
5265 | if (pid < 0) | |
5266 | { | |
5267 | log_write(0, LOG_MAIN|LOG_PANIC, "failed to fork automatic delivery " | |
5268 | "process: %s", strerror(errno)); | |
5269 | } | |
5270 | ||
5271 | /* In the parent, wait if synchronous delivery is required. This will | |
5272 | always be the case in MUA wrapper mode. */ | |
5273 | ||
5274 | else if (synchronous_delivery) | |
5275 | { | |
5276 | int status; | |
5277 | while (wait(&status) != pid); | |
5278 | if ((status & 0x00ff) != 0) | |
5279 | log_write(0, LOG_MAIN|LOG_PANIC, | |
5280 | "process %d crashed with signal %d while delivering %s", | |
5281 | (int)pid, status & 0x00ff, message_id); | |
5282 | if (mua_wrapper && (status & 0xffff) != 0) exim_exit(EXIT_FAILURE); | |
5283 | } | |
5284 | } | |
5285 | ||
5286 | /* The loop will repeat if more is TRUE. If we do not know know that the OS | |
5287 | automatically reaps children (see comments above the loop), clear away any | |
5288 | finished subprocesses here, in case there are lots of messages coming in | |
5289 | from the same source. */ | |
5290 | ||
5291 | #ifndef SIG_IGN_WORKS | |
5292 | while (waitpid(-1, NULL, WNOHANG) > 0); | |
5293 | #endif | |
5294 | } | |
5295 | ||
5296 | exim_exit(EXIT_SUCCESS); /* Never returns */ | |
5297 | return 0; /* To stop compiler warning */ | |
5298 | } | |
5299 | ||
5300 | /* End of exim.c */ |