Commit | Line | Data |
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c988f1f4 | 1 | /* $Cambridge: exim/src/src/moan.c,v 1.2 2005/01/04 10:00:42 ph10 Exp $ */ |
059ec3d9 PH |
2 | |
3 | /************************************************* | |
4 | * Exim - an Internet mail transport agent * | |
5 | *************************************************/ | |
6 | ||
c988f1f4 | 7 | /* Copyright (c) University of Cambridge 1995 - 2005 */ |
059ec3d9 PH |
8 | /* See the file NOTICE for conditions of use and distribution. */ |
9 | ||
10 | /* Functions for sending messages to sender or to mailmaster. */ | |
11 | ||
12 | ||
13 | #include "exim.h" | |
14 | ||
15 | ||
16 | ||
17 | /************************************************* | |
18 | * Send error message * | |
19 | *************************************************/ | |
20 | ||
21 | /* This function sends an error message by opening a pipe to a new process | |
22 | running Exim, and writing a message to it using the "-t" option. This is not | |
23 | used for delivery failures, which have their own code for handing failed | |
24 | addresses. | |
25 | ||
26 | Arguments: | |
27 | recipient addressee for the message | |
28 | ident identifies the type of error | |
29 | eblock chain of error_blocks containing data about the error | |
30 | headers the message's headers | |
31 | message_file FILE containing the body of the message | |
32 | firstline contains first line of file, if it was read to check for | |
33 | "From ", but it turned out not to be | |
34 | ||
35 | Returns: TRUE if message successfully sent | |
36 | */ | |
37 | ||
38 | static BOOL | |
39 | moan_send_message(uschar *recipient, int ident, error_block *eblock, | |
40 | header_line *headers, FILE *message_file, uschar *firstline) | |
41 | { | |
42 | int written = 0; | |
43 | int fd; | |
44 | int status; | |
45 | int count = 0; | |
46 | int size_limit = bounce_return_size_limit; | |
47 | FILE *f; | |
48 | int pid = child_open_exim(&fd); | |
49 | ||
50 | /* Creation of child failed */ | |
51 | ||
52 | if (pid < 0) | |
53 | { | |
54 | DEBUG(D_any) debug_printf("Failed to create child to send message: %s\n", | |
55 | strerror(errno)); | |
56 | return FALSE; | |
57 | } | |
58 | else DEBUG(D_any) debug_printf("Child process %d for sending message\n", pid); | |
59 | ||
60 | /* Creation of child succeeded */ | |
61 | ||
62 | f = fdopen(fd, "wb"); | |
63 | if (errors_reply_to != NULL) fprintf(f, "Reply-To: %s\n", errors_reply_to); | |
64 | fprintf(f, "Auto_submitted: auto-generated\n"); | |
65 | fprintf(f, "From: Mail Delivery System <Mailer-Daemon@%s>\n", | |
66 | qualify_domain_sender); | |
67 | fprintf(f, "To: %s\n", recipient); | |
68 | ||
69 | switch(ident) | |
70 | { | |
71 | case ERRMESS_BADARGADDRESS: | |
72 | fprintf(f, | |
73 | "Subject: Mail failure - malformed recipient address\n\n"); | |
74 | fprintf(f, | |
75 | "A message that you sent contained a recipient address that was incorrectly\n" | |
76 | "constructed:\n\n"); | |
77 | fprintf(f, " %s %s\n", eblock->text1, eblock->text2); | |
78 | count = Ustrlen(eblock->text1); | |
79 | if (count > 0 && eblock->text1[count-1] == '.') | |
80 | fprintf(f, | |
81 | "\nRecipient addresses must not end with a '.' character.\n"); | |
82 | fprintf(f, | |
83 | "\nThe message has not been delivered to any recipients.\n"); | |
84 | break; | |
85 | ||
86 | case ERRMESS_BADNOADDRESS: | |
87 | case ERRMESS_BADADDRESS: | |
88 | fprintf(f, | |
89 | "Subject: Mail failure - malformed recipient address\n\n"); | |
90 | fprintf(f, | |
91 | "A message that you sent contained one or more recipient addresses that were\n" | |
92 | "incorrectly constructed:\n\n"); | |
93 | ||
94 | while (eblock != NULL) | |
95 | { | |
96 | fprintf(f, " %s: %s\n", eblock->text1, eblock->text2); | |
97 | count++; | |
98 | eblock = eblock->next; | |
99 | } | |
100 | ||
101 | fprintf(f, (count == 1)? "\nThis address has been ignored. " : | |
102 | "\nThese addresses have been ignored. "); | |
103 | ||
104 | fprintf(f, (ident == ERRMESS_BADADDRESS)? | |
105 | "The other addresses in the message were\n" | |
106 | "syntactically valid and have been passed on for an attempt at delivery.\n" : | |
107 | ||
108 | "There were no other addresses in your\n" | |
109 | "message, and so no attempt at delivery was possible.\n"); | |
110 | break; | |
111 | ||
112 | case ERRMESS_IGADDRESS: | |
113 | fprintf(f, "Subject: Mail failure - no recipient addresses\n\n"); | |
114 | fprintf(f, | |
115 | "A message that you sent using the -t command line option contained no\n" | |
116 | "addresses that were not also on the command line, and were therefore\n" | |
117 | "suppressed. This left no recipient addresses, and so no delivery could\n" | |
118 | "be attempted.\n"); | |
119 | break; | |
120 | ||
121 | case ERRMESS_NOADDRESS: | |
122 | fprintf(f, "Subject: Mail failure - no recipient addresses\n\n"); | |
123 | fprintf(f, | |
124 | "A message that you sent contained no recipient addresses, and therefore no\n" | |
125 | "delivery could be attempted.\n"); | |
126 | break; | |
127 | ||
128 | case ERRMESS_IOERR: | |
129 | fprintf(f, "Subject: Mail failure - system failure\n\n"); | |
130 | fprintf(f, | |
131 | "A system failure was encountered while processing a message that you sent,\n" | |
132 | "so it has not been possible to deliver it. The error was:\n\n%s\n", | |
133 | eblock->text1); | |
134 | break; | |
135 | ||
136 | case ERRMESS_VLONGHEADER: | |
137 | fprintf(f, "Subject: Mail failure - overlong header section\n\n"); | |
138 | fprintf(f, | |
139 | "A message that you sent contained a header section that was excessively\n" | |
140 | "long and could not be handled by the mail transmission software. The\n" | |
141 | "message has not been delivered to any recipients.\n"); | |
142 | break; | |
143 | ||
144 | case ERRMESS_VLONGHDRLINE: | |
145 | fprintf(f, "Subject: Mail failure - overlong header line\n\n"); | |
146 | fprintf(f, | |
147 | "A message that you sent contained a header line that was excessively\n" | |
148 | "long and could not be handled by the mail transmission software. The\n" | |
149 | "message has not been delivered to any recipients.\n"); | |
150 | break; | |
151 | ||
152 | case ERRMESS_TOOBIG: | |
153 | fprintf(f, "Subject: Mail failure - message too big\n\n"); | |
154 | fprintf(f, | |
155 | "A message that you sent was longer than the maximum size allowed on this\n" | |
156 | "system. It was not delivered to any recipients.\n"); | |
157 | break; | |
158 | ||
159 | case ERRMESS_TOOMANYRECIP: | |
160 | fprintf(f, "Subject: Mail failure - too many recipients\n\n"); | |
161 | fprintf(f, | |
162 | "A message that you sent contained more recipients than allowed on this\n" | |
163 | "system. It was not delivered to any recipients.\n"); | |
164 | break; | |
165 | ||
166 | case ERRMESS_LOCAL_SCAN: | |
167 | case ERRMESS_LOCAL_ACL: | |
168 | fprintf(f, "Subject: Mail failure - rejected by local scanning code\n\n"); | |
169 | fprintf(f, | |
170 | "A message that you sent was rejected by the local scanning code that\n" | |
171 | "checks incoming messages on this system."); | |
172 | if (eblock->text1 != NULL) | |
173 | { | |
174 | fprintf(f, | |
175 | " The following error was given:\n\n %s", eblock->text1); | |
176 | } | |
177 | fprintf(f, "\n"); | |
178 | break; | |
179 | ||
180 | default: | |
181 | fprintf(f, "Subject: Mail failure\n\n"); | |
182 | fprintf(f, | |
183 | "A message that you sent has caused the error routine to be entered with\n" | |
184 | "an unknown error number (%d).\n", ident); | |
185 | break; | |
186 | } | |
187 | ||
188 | /* Now copy the message - headers then the rest of the input if | |
189 | available, up to the configured limit. */ | |
190 | ||
191 | if (size_limit == 0 || size_limit > thismessage_size_limit) | |
192 | size_limit = thismessage_size_limit; | |
193 | ||
194 | if (size_limit > 0 && size_limit < message_size) | |
195 | { | |
196 | int x = size_limit; | |
197 | uschar *k = US""; | |
198 | if ((x & 1023) == 0) | |
199 | { | |
200 | k = US"K"; | |
201 | x >>= 10; | |
202 | } | |
203 | fprintf(f, "\n" | |
204 | "------ This is a copy of your message, including all the headers.\n" | |
205 | "------ No more than %d%s characters of the body are included.\n\n", x, k); | |
206 | } | |
207 | else fprintf(f, "\n" | |
208 | "------ This is a copy of your message, including all the headers. ------" | |
209 | "\n\n"); | |
210 | ||
211 | /* If the error occurred before the Received: header was created, its text | |
212 | field will still be NULL; just omit such a header line. */ | |
213 | ||
214 | while (headers != NULL) | |
215 | { | |
216 | if (headers->text != NULL) fprintf(f, "%s", CS headers->text); | |
217 | headers = headers->next; | |
218 | } | |
219 | ||
220 | if (ident != ERRMESS_VLONGHEADER && ident != ERRMESS_VLONGHDRLINE) | |
221 | fputc('\n', f); | |
222 | ||
223 | /* After early detection of an error, the message file may be STDIN, | |
224 | in which case we might have to terminate on a line containing just "." | |
225 | as well as on EOF. We may already have the first line in memory. */ | |
226 | ||
227 | if (message_file != NULL) | |
228 | { | |
229 | int ch; | |
230 | int state = 1; | |
231 | BOOL enddot = dot_ends && message_file == stdin; | |
232 | if (firstline != NULL) fprintf(f, "%s", CS firstline); | |
233 | while ((ch = fgetc(message_file)) != EOF) | |
234 | { | |
235 | fputc(ch, f); | |
236 | if (size_limit > 0 && ++written > size_limit) break; | |
237 | if (enddot) | |
238 | { | |
239 | if (state == 0) { if (ch == '\n') state = 1; } | |
240 | else if (state == 1) | |
241 | { if (ch == '.') state = 2; else if (ch != '\n') state = 0; } | |
242 | else | |
243 | { if (ch == '\n') break; else state = 0; } | |
244 | } | |
245 | } | |
246 | } | |
247 | ||
248 | /* Close the file, which should send an EOF to the child process | |
249 | that is receiving the message. Wait for it to finish, without a timeout. */ | |
250 | ||
251 | fclose(f); | |
252 | status = child_close(pid, 0); /* Waits for child to close */ | |
253 | if (status != 0) | |
254 | { | |
255 | uschar *msg = US"Child mail process returned status"; | |
256 | if (status == -257) | |
257 | log_write(0, LOG_MAIN, "%s %d: errno=%d: %s", msg, status, errno, | |
258 | strerror(errno)); | |
259 | else | |
260 | log_write(0, LOG_MAIN, "%s %d", msg, status); | |
261 | return FALSE; | |
262 | } | |
263 | ||
264 | return TRUE; | |
265 | } | |
266 | ||
267 | ||
268 | ||
269 | /************************************************* | |
270 | * Send message to sender * | |
271 | *************************************************/ | |
272 | ||
273 | /* This function is called when errors are detected during the receipt of a | |
274 | message. Delivery failures are handled separately in deliver.c. | |
275 | ||
276 | If there is a valid sender_address, and the failing message is not a local | |
277 | error message, then this function calls moan_send_message to send a message to | |
278 | that person. If the sender's address is null, then an error has occurred with a | |
279 | message that was generated by a mailer daemon. All we can do is to write | |
280 | information to log files. The same action is taken if local_error_message is | |
281 | set - this can happen for non null-senders in certain configurations where exim | |
282 | doesn't run setuid root. | |
283 | ||
284 | Arguments: | |
285 | ident identifies the particular error | |
286 | eblock chain of error_blocks containing data about the error | |
287 | headers message's headers (chain) | |
288 | message_file a FILE where the body of the message can be read | |
289 | check_sender if TRUE, read the first line of the file for a possible | |
290 | "From " sender (if a trusted caller) | |
291 | ||
292 | Returns: FALSE if there is no sender_address to send to; | |
293 | else the return from moan_send_message() | |
294 | */ | |
295 | ||
296 | BOOL | |
297 | moan_to_sender(int ident, error_block *eblock, header_line *headers, | |
298 | FILE *message_file, BOOL check_sender) | |
299 | { | |
300 | uschar *firstline = NULL; | |
301 | uschar *msg = US"Error while reading message with no usable sender address"; | |
302 | ||
303 | if (message_reference != NULL) | |
304 | msg = string_sprintf("%s (R=%s)", msg, message_reference); | |
305 | ||
306 | /* Find the sender from a From line if permitted and possible */ | |
307 | ||
308 | if (check_sender && message_file != NULL && trusted_caller && | |
309 | Ufgets(big_buffer, BIG_BUFFER_SIZE, message_file) != NULL) | |
310 | { | |
311 | uschar *new_sender = NULL; | |
312 | if (regex_match_and_setup(regex_From, big_buffer, 0, -1)) | |
313 | new_sender = expand_string(uucp_from_sender); | |
314 | if (new_sender != NULL) sender_address = new_sender; | |
315 | else firstline = big_buffer; | |
316 | } | |
317 | ||
318 | /* If viable sender address, send a message */ | |
319 | ||
320 | if (sender_address != NULL && sender_address[0] != 0 && !local_error_message) | |
321 | return moan_send_message(sender_address, ident, eblock, headers, | |
322 | message_file, firstline); | |
323 | ||
324 | /* Otherwise, we can only log */ | |
325 | ||
326 | switch(ident) | |
327 | { | |
328 | case ERRMESS_BADARGADDRESS: | |
329 | case ERRMESS_BADNOADDRESS: | |
330 | case ERRMESS_BADADDRESS: | |
331 | log_write(0, LOG_MAIN, "%s: at least one malformed recipient address: " | |
332 | "%s - %s", msg, eblock->text1, eblock->text2); | |
333 | break; | |
334 | ||
335 | case ERRMESS_IGADDRESS: | |
336 | case ERRMESS_NOADDRESS: | |
337 | log_write(0, LOG_MAIN, "%s: no recipient addresses", msg); | |
338 | break; | |
339 | ||
340 | /* This error has already been logged. */ | |
341 | case ERRMESS_IOERR: | |
342 | break; | |
343 | ||
344 | case ERRMESS_VLONGHEADER: | |
345 | log_write(0, LOG_MAIN, "%s: excessively long message header section read " | |
346 | "(more than %d characters)", msg, header_maxsize); | |
347 | break; | |
348 | ||
349 | case ERRMESS_VLONGHDRLINE: | |
350 | log_write(0, LOG_MAIN, "%s: excessively long message header line read " | |
351 | "(more than %d characters)", msg, header_line_maxsize); | |
352 | break; | |
353 | ||
354 | case ERRMESS_TOOBIG: | |
355 | log_write(0, LOG_MAIN, "%s: message too big (limit set to %d)", msg, | |
356 | thismessage_size_limit); | |
357 | break; | |
358 | ||
359 | case ERRMESS_TOOMANYRECIP: | |
360 | log_write(0, LOG_MAIN, "%s: too many recipients (max set to %d)", msg, | |
361 | recipients_max); | |
362 | break; | |
363 | ||
364 | case ERRMESS_LOCAL_SCAN: | |
365 | log_write(0, LOG_MAIN, "%s: rejected by local_scan: %s", msg, eblock->text1); | |
366 | break; | |
367 | ||
368 | case ERRMESS_LOCAL_ACL: | |
369 | log_write(0, LOG_MAIN, "%s: rejected by non-SMTP ACL: %s", msg, eblock->text1); | |
370 | break; | |
371 | ||
372 | default: | |
373 | log_write(0, LOG_MAIN|LOG_PANIC, "%s: unknown error number %d", msg, | |
374 | ident); | |
375 | break; | |
376 | } | |
377 | ||
378 | return FALSE; | |
379 | } | |
380 | ||
381 | ||
382 | ||
383 | /************************************************* | |
384 | * Send message to someone * | |
385 | *************************************************/ | |
386 | ||
387 | /* This is called when exim is configured to tell someone (often the | |
388 | mailmaster) about some incident. | |
389 | ||
390 | Arguments: | |
391 | who address to send mail to | |
392 | addr chain of deferred addresses whose details are to be included | |
393 | subject subject text for the message | |
394 | format a printf() format for the body of the message | |
395 | ... arguments for the format | |
396 | ||
397 | Returns: nothing | |
398 | */ | |
399 | ||
400 | void | |
401 | moan_tell_someone(uschar *who, address_item *addr, uschar *subject, | |
402 | char *format, ...) | |
403 | { | |
404 | FILE *f; | |
405 | va_list ap; | |
406 | int fd; | |
407 | int pid = child_open_exim(&fd); | |
408 | ||
409 | if (pid < 0) | |
410 | { | |
411 | DEBUG(D_any) debug_printf("Failed to create child to send message: %s\n", | |
412 | strerror(errno)); | |
413 | return; | |
414 | } | |
415 | ||
416 | f = fdopen(fd, "wb"); | |
417 | fprintf(f, "Auto_submitted: auto-generated\n"); | |
418 | fprintf(f, "From: Mail Delivery System <Mailer-Daemon@%s>\n", | |
419 | qualify_domain_sender); | |
420 | fprintf(f, "To: %s\n", who); | |
421 | fprintf(f, "Subject: %s\n\n", subject); | |
422 | va_start(ap, format); | |
423 | vfprintf(f, format, ap); | |
424 | va_end(ap); | |
425 | ||
426 | if (addr != NULL) | |
427 | { | |
428 | fprintf(f, "\nThe following address(es) have yet to be delivered:\n"); | |
429 | for (; addr != NULL; addr = addr->next) | |
430 | { | |
431 | uschar *parent = (addr->parent == NULL)? NULL : addr->parent->address; | |
432 | fprintf(f, " %s", addr->address); | |
433 | if (parent != NULL) fprintf(f, " <%s>", parent); | |
434 | if (addr->basic_errno > 0) fprintf(f, ": %s", strerror(addr->basic_errno)); | |
435 | if (addr->message != NULL) fprintf(f, ": %s", addr->message); | |
436 | fprintf(f, "\n"); | |
437 | } | |
438 | } | |
439 | ||
440 | fclose(f); | |
441 | child_close(pid, 0); /* Waits for child to close; no timeout */ | |
442 | } | |
443 | ||
444 | ||
445 | ||
446 | /************************************************* | |
447 | * Handle SMTP batch error * | |
448 | *************************************************/ | |
449 | ||
450 | /* This is called when something goes wrong in batched (-bS) SMTP input. | |
451 | Information is written to stdout and/or stderr, and Exim exits with a non-zero | |
452 | completion code. BSMTP is almost always called by some other program, so it is | |
453 | up to that program to interpret the return code and do something with the error | |
454 | information, and also to preserve the batch input file for human analysis. | |
455 | ||
456 | Formerly, Exim used to attempt to continue after some errors, but this strategy | |
457 | has been abandoned as it can lead to loss of messages. | |
458 | ||
459 | Arguments: | |
460 | cmd_buffer the command causing the error, or NULL | |
461 | format a printf() format | |
462 | ... arguments for the format | |
463 | ||
464 | Returns: does not return; exits from the program | |
465 | exit code = 1 if some messages were accepted | |
466 | exit code = 2 if no messages were accepted | |
467 | */ | |
468 | ||
469 | void | |
470 | moan_smtp_batch(uschar *cmd_buffer, char *format, ...) | |
471 | { | |
472 | va_list ap; | |
473 | int yield = (receive_messagecount > 0)? 1 : 2; | |
474 | ||
475 | DEBUG(D_any) debug_printf("Handling error in batched SMTP input\n"); | |
476 | ||
477 | /* On stdout, write stuff that a program could parse fairly easily. */ | |
478 | ||
479 | va_start(ap, format); | |
480 | vfprintf(stdout, format, ap); | |
481 | va_end(ap); | |
482 | ||
483 | fprintf(stdout, "\nTransaction started in line %d\n", | |
484 | bsmtp_transaction_linecount); | |
485 | fprintf(stdout, "Error detected in line %d\n", receive_linecount); | |
486 | if (cmd_buffer != NULL) fprintf(stdout, "%s\n", cmd_buffer); | |
487 | ||
488 | /* On stderr, write stuff for human consumption */ | |
489 | ||
490 | fprintf(stderr, | |
491 | "An error was detected while processing a file of BSMTP input.\n" | |
492 | "The error message was:\n\n "); | |
493 | ||
494 | va_start(ap, format); | |
495 | vfprintf(stderr, format, ap); | |
496 | va_end(ap); | |
497 | ||
498 | fprintf(stderr, | |
499 | "\n\nThe SMTP transaction started in line %d.\n" | |
500 | "The error was detected in line %d.\n", | |
501 | bsmtp_transaction_linecount, receive_linecount); | |
502 | ||
503 | if (cmd_buffer != NULL) | |
504 | { | |
505 | fprintf(stderr, "The SMTP command at fault was:\n\n %s\n\n", | |
506 | cmd_buffer); | |
507 | } | |
508 | ||
509 | fprintf(stderr, "%d previous message%s successfully processed.\n", | |
510 | receive_messagecount, (receive_messagecount == 1)? " was" : "s were"); | |
511 | ||
512 | fprintf(stderr, "The rest of the batch was abandoned.\n"); | |
513 | ||
514 | exim_exit(yield); | |
515 | } | |
516 | ||
517 | ||
518 | ||
519 | ||
520 | /************************************************* | |
521 | * Check for error copies * | |
522 | *************************************************/ | |
523 | ||
524 | /* This function is passed the recipient of an error message, and must check | |
525 | the error_copies string to see whether there is an additional recipient list to | |
526 | which errors for this recipient must be bcc'd. The incoming recipient is always | |
527 | fully qualified. | |
528 | ||
529 | Argument: recipient address | |
530 | Returns: additional recipient list or NULL | |
531 | */ | |
532 | ||
533 | uschar * | |
534 | moan_check_errorcopy(uschar *recipient) | |
535 | { | |
536 | uschar *item, *localpart, *domain; | |
537 | uschar *listptr = errors_copy; | |
538 | uschar *yield = NULL; | |
539 | uschar buffer[256]; | |
540 | int sep = 0; | |
541 | int llen; | |
542 | ||
543 | if (errors_copy == NULL) return NULL; | |
544 | ||
545 | /* Set up pointer to the local part and domain, and compute the | |
546 | length of the local part. */ | |
547 | ||
548 | localpart = recipient; | |
549 | domain = Ustrchr(recipient, '@'); | |
550 | if (domain == NULL) return NULL; /* should not occur, but avoid crash */ | |
551 | llen = domain++ - recipient; | |
552 | ||
553 | /* Scan through the configured items */ | |
554 | ||
555 | while ((item = string_nextinlist(&listptr, &sep, buffer, sizeof(buffer))) | |
556 | != NULL) | |
557 | { | |
558 | uschar *newaddress = item; | |
559 | uschar *pattern = string_dequote(&newaddress); | |
560 | ||
561 | /* If no new address found, just skip this item. */ | |
562 | ||
563 | while (isspace(*newaddress)) newaddress++; | |
564 | if (*newaddress == 0) continue; | |
565 | ||
566 | /* We now have an item to match as an address in item, and the additional | |
567 | address in newaddress. If the pattern matches, expand the new address string | |
568 | and return it. During expansion, make local part and domain available for | |
569 | insertion. This requires a copy to be made; we can't just temporarily | |
570 | terminate it, as the whole address is required for $0. */ | |
571 | ||
572 | if (match_address_list(recipient, TRUE, TRUE, &pattern, NULL, 0, UCHAR_MAX+1, | |
573 | NULL) == OK) | |
574 | { | |
575 | uschar temp[256]; | |
576 | Ustrncpy(temp, localpart, llen); | |
577 | temp[llen] = 0; | |
578 | deliver_localpart = temp; | |
579 | deliver_domain = domain; | |
580 | yield = expand_string_copy(newaddress); | |
581 | deliver_domain = deliver_localpart = NULL; | |
582 | if (yield == NULL) | |
583 | log_write(0, LOG_MAIN|LOG_PANIC, "Failed to expand %s when processing " | |
584 | "errors_copy: %s", newaddress, expand_string_message); | |
585 | break; | |
586 | } | |
587 | } | |
588 | ||
589 | DEBUG(D_any) debug_printf("errors_copy check returned %s\n", | |
590 | (yield == NULL)? US"NULL" : yield); | |
591 | ||
592 | expand_nmax = -1; | |
593 | return yield; | |
594 | } | |
595 | ||
596 | ||
597 | ||
598 | /************************************************ | |
599 | * Handle skipped syntax errors * | |
600 | ************************************************/ | |
601 | ||
602 | /* This function is called by the redirect router when it has skipped over one | |
603 | or more syntax errors in the list of addresses. If there is an address to mail | |
604 | to, send a message, and always write the information to the log. In the case of | |
605 | a filter file, a "syntax error" might actually be something else, such as the | |
606 | inability to open a log file. Thus, the wording of the error message is | |
607 | general. | |
608 | ||
609 | Arguments: | |
610 | rname the router name | |
611 | eblock chain of error blocks | |
612 | syntax_errors_to address to send mail to, or NULL | |
613 | some TRUE if some addresses were generated; FALSE if none were | |
614 | custom custom message text | |
615 | ||
616 | Returns: FALSE if string expansion failed; TRUE otherwise | |
617 | */ | |
618 | ||
619 | BOOL | |
620 | moan_skipped_syntax_errors(uschar *rname, error_block *eblock, | |
621 | uschar *syntax_errors_to, BOOL some, uschar *custom) | |
622 | { | |
623 | int pid, fd; | |
624 | uschar *s, *t; | |
625 | FILE *f; | |
626 | error_block *e; | |
627 | ||
628 | for (e = eblock; e != NULL; e = e->next) | |
629 | { | |
630 | if (e->text2 != NULL) | |
631 | log_write(0, LOG_MAIN, "%s router: skipped error: %s in \"%s\"", | |
632 | rname, e->text1, e->text2); | |
633 | else | |
634 | log_write(0, LOG_MAIN, "%s router: skipped error: %s", rname, | |
635 | e->text1); | |
636 | } | |
637 | ||
638 | if (syntax_errors_to == NULL) return TRUE; | |
639 | ||
640 | s = expand_string(syntax_errors_to); | |
641 | if (s == NULL) | |
642 | { | |
643 | log_write(0, LOG_MAIN, "%s router failed to expand %s: %s", rname, | |
644 | syntax_errors_to, expand_string_message); | |
645 | return FALSE; | |
646 | } | |
647 | ||
648 | /* If we can't create a process to send the message, just forget about | |
649 | it. */ | |
650 | ||
651 | pid = child_open_exim(&fd); | |
652 | ||
653 | if (pid < 0) | |
654 | { | |
655 | DEBUG(D_any) debug_printf("Failed to create child to send message: %s\n", | |
656 | strerror(errno)); | |
657 | return TRUE; | |
658 | } | |
659 | ||
660 | f = fdopen(fd, "wb"); | |
661 | fprintf(f, "Auto_submitted: auto-generated\n"); | |
662 | fprintf(f, "From: Mail Delivery System <Mailer-Daemon@%s>\n", | |
663 | qualify_domain_sender); | |
664 | fprintf(f, "To: %s\n", s); | |
665 | fprintf(f, "Subject: error(s) in forwarding or filtering\n\n"); | |
666 | ||
667 | if (custom != NULL) | |
668 | { | |
669 | t = expand_string(custom); | |
670 | if (t == NULL) | |
671 | { | |
672 | log_write(0, LOG_MAIN, "%s router failed to expand %s: %s", rname, | |
673 | custom, expand_string_message); | |
674 | return FALSE; | |
675 | } | |
676 | fprintf(f, "%s\n\n", t); | |
677 | } | |
678 | ||
679 | fprintf(f, "The %s router encountered the following error(s):\n\n", | |
680 | rname); | |
681 | ||
682 | for (e = eblock; e != NULL; e = e->next) | |
683 | { | |
684 | fprintf(f, " %s", e->text1); | |
685 | if (e->text2 != NULL) | |
686 | fprintf(f, " in the address\n \"%s\"", e->text2); | |
687 | fprintf(f, "\n\n"); | |
688 | } | |
689 | ||
690 | if (some) | |
691 | fprintf(f, "Other addresses were processed normally.\n"); | |
692 | else | |
693 | fprintf(f, "No valid addresses were generated.\n"); | |
694 | ||
695 | fclose(f); | |
696 | child_close(pid, 0); /* Waits for child to close; no timeout */ | |
697 | ||
698 | return TRUE; | |
699 | } | |
700 | ||
701 | /* End of moan.c */ |