Commit | Line | Data |
---|---|---|
059ec3d9 PH |
1 | /************************************************* |
2 | * Exim - an Internet mail transport agent * | |
3 | *************************************************/ | |
4 | ||
3386088d | 5 | /* Copyright (c) University of Cambridge 1995 - 2015 */ |
059ec3d9 PH |
6 | /* See the file NOTICE for conditions of use and distribution. */ |
7 | ||
8 | /* Functions for writing spool files, and moving them about. */ | |
9 | ||
10 | ||
11 | #include "exim.h" | |
12 | ||
13 | ||
14 | ||
15 | /************************************************* | |
16 | * Deal with header writing errors * | |
17 | *************************************************/ | |
18 | ||
19 | /* This function is called immediately after errors in writing the spool, with | |
20 | errno still set. It creates and error message, depending on the circumstances. | |
21 | If errmsg is NULL, it logs the message and panic-dies. Otherwise errmsg is set | |
22 | to point to the message, and -1 is returned. This function makes the code of | |
23 | spool_write_header() a bit neater. | |
24 | ||
25 | Arguments: | |
26 | where SW_RECEIVING, SW_DELIVERING, or SW_MODIFYING | |
27 | errmsg where to put the message; NULL => panic-die | |
28 | s text to add to log string | |
29 | temp_name name of temp file to unlink | |
30 | f FILE to close, if not NULL | |
31 | ||
32 | Returns: -1 if errmsg is not NULL; otherwise doesn't return | |
33 | */ | |
34 | ||
35 | static int | |
36 | spool_write_error(int where, uschar **errmsg, uschar *s, uschar *temp_name, | |
37 | FILE *f) | |
38 | { | |
39 | uschar *msg = (where == SW_RECEIVING)? | |
40 | string_sprintf("spool file %s error while receiving from %s: %s", s, | |
41 | (sender_fullhost != NULL)? sender_fullhost : sender_ident, | |
42 | strerror(errno)) | |
43 | : | |
44 | string_sprintf("spool file %s error while %s: %s", s, | |
45 | (where == SW_DELIVERING)? "delivering" : "modifying", | |
46 | strerror(errno)); | |
47 | ||
48 | if (temp_name != NULL) Uunlink(temp_name); | |
f1e894f3 | 49 | if (f != NULL) (void)fclose(f); |
059ec3d9 PH |
50 | |
51 | if (errmsg == NULL) | |
52 | log_write(0, LOG_MAIN|LOG_PANIC_DIE, "%s", msg); | |
53 | else | |
54 | *errmsg = msg; | |
55 | ||
56 | return -1; | |
57 | } | |
58 | ||
59 | ||
60 | ||
61 | /************************************************* | |
62 | * Open file under temporary name * | |
63 | *************************************************/ | |
64 | ||
65 | /* This is used for opening spool files under a temporary name, | |
66 | with a single attempt at deleting if they already exist. | |
67 | ||
68 | Argument: temporary name for spool header file | |
69 | Returns: file descriptor of open file, or < 0 on failure, with errno unchanged | |
70 | */ | |
71 | ||
72 | int | |
73 | spool_open_temp(uschar *temp_name) | |
74 | { | |
75 | int fd = Uopen(temp_name, O_RDWR|O_CREAT|O_EXCL, SPOOL_MODE); | |
76 | ||
77 | /* If the file already exists, something has gone wrong. This process may well | |
78 | have previously created the file if it is delivering more than one address, but | |
79 | it should have renamed it almost immediately. A file could, however, be left | |
80 | around as a result of a system crash, and by coincidence this process might | |
81 | have the same pid. We therefore have one go at unlinking it before giving up. | |
82 | */ | |
83 | ||
84 | if (fd < 0 && errno == EEXIST) | |
85 | { | |
86 | DEBUG(D_any) debug_printf("%s exists: unlinking\n", temp_name); | |
87 | Uunlink(temp_name); | |
88 | fd = Uopen(temp_name, O_RDWR|O_CREAT|O_EXCL, SPOOL_MODE); | |
89 | } | |
90 | ||
91 | /* If the file has been opened, make sure the file's group is the Exim gid, and | |
92 | double-check the mode because the group setting doesn't always get set | |
93 | automatically. */ | |
94 | ||
95 | if (fd >= 0) | |
1ac6b2e7 JH |
96 | if (fchown(fd, exim_uid, exim_gid) || fchmod(fd, SPOOL_MODE)) |
97 | { | |
98 | DEBUG(D_any) debug_printf("failed setting perms on %s\n", temp_name); | |
99 | (void) close(fd); fd = -1; | |
100 | Uunlink(temp_name); | |
101 | } | |
059ec3d9 PH |
102 | |
103 | return fd; | |
104 | } | |
105 | ||
106 | ||
107 | ||
108 | /************************************************* | |
109 | * Write the header spool file * | |
110 | *************************************************/ | |
111 | ||
112 | /* Returns the size of the file for success; zero for failure. The file is | |
113 | written under a temporary name, and then renamed. It's done this way so that it | |
114 | works with re-writing the file on message deferral as well as for the initial | |
115 | write. Whenever this function is called, the data file for the message should | |
116 | be open and locked, thus preventing any other exim process from working on this | |
117 | message. | |
118 | ||
119 | Argument: | |
120 | id the message id | |
121 | where SW_RECEIVING, SW_DELIVERING, or SW_MODIFYING | |
122 | errmsg where to put an error message; if NULL, panic-die on error | |
123 | ||
124 | Returns: the size of the header texts on success; | |
125 | negative on writing failure, unless errmsg == NULL | |
126 | */ | |
127 | ||
128 | int | |
129 | spool_write_header(uschar *id, int where, uschar **errmsg) | |
130 | { | |
131 | int fd; | |
132 | int i; | |
133 | int size_correction; | |
134 | FILE *f; | |
135 | header_line *h; | |
136 | struct stat statbuf; | |
137 | uschar name[256]; | |
138 | uschar temp_name[256]; | |
139 | ||
140 | sprintf(CS temp_name, "%s/input/%s/hdr.%d", spool_directory, message_subdir, | |
141 | (int)getpid()); | |
142 | fd = spool_open_temp(temp_name); | |
143 | if (fd < 0) return spool_write_error(where, errmsg, US"open", NULL, NULL); | |
144 | f = fdopen(fd, "wb"); | |
145 | DEBUG(D_receive|D_deliver) debug_printf("Writing spool header file\n"); | |
146 | ||
147 | /* We now have an open file to which the header data is to be written. Start | |
148 | with the file's leaf name, to make the file self-identifying. Continue with the | |
149 | identity of the submitting user, followed by the sender's address. The sender's | |
150 | address is enclosed in <> because it might be the null address. Then write the | |
151 | received time and the number of warning messages that have been sent. */ | |
152 | ||
153 | fprintf(f, "%s-H\n", message_id); | |
154 | fprintf(f, "%.63s %ld %ld\n", originator_login, (long int)originator_uid, | |
155 | (long int)originator_gid); | |
156 | fprintf(f, "<%s>\n", sender_address); | |
157 | fprintf(f, "%d %d\n", received_time, warning_count); | |
158 | ||
159 | /* If there is information about a sending host, remember it. The HELO | |
160 | data can be set for local SMTP as well as remote. */ | |
161 | ||
162 | if (sender_helo_name != NULL) | |
163 | fprintf(f, "-helo_name %s\n", sender_helo_name); | |
164 | ||
165 | if (sender_host_address != NULL) | |
166 | { | |
167 | fprintf(f, "-host_address %s.%d\n", sender_host_address, sender_host_port); | |
168 | if (sender_host_name != NULL) | |
169 | fprintf(f, "-host_name %s\n", sender_host_name); | |
170 | if (sender_host_authenticated != NULL) | |
171 | fprintf(f, "-host_auth %s\n", sender_host_authenticated); | |
172 | } | |
173 | ||
174 | /* Also about the interface a message came in on */ | |
175 | ||
176 | if (interface_address != NULL) | |
177 | fprintf(f, "-interface_address %s.%d\n", interface_address, interface_port); | |
8e669ac1 | 178 | |
1f5b4c3d | 179 | if (smtp_active_hostname != primary_hostname) |
8e669ac1 | 180 | fprintf(f, "-active_hostname %s\n", smtp_active_hostname); |
059ec3d9 PH |
181 | |
182 | /* Likewise for any ident information; for local messages this is | |
183 | likely to be the same as originator_login, but will be different if | |
184 | the originator was root, forcing a different ident. */ | |
185 | ||
186 | if (sender_ident != NULL) fprintf(f, "-ident %s\n", sender_ident); | |
187 | ||
188 | /* Ditto for the received protocol */ | |
189 | ||
190 | if (received_protocol != NULL) | |
191 | fprintf(f, "-received_protocol %s\n", received_protocol); | |
192 | ||
38a0a95f | 193 | /* Preserve any ACL variables that are set. */ |
059ec3d9 | 194 | |
38a0a95f PH |
195 | tree_walk(acl_var_c, &acl_var_write, f); |
196 | tree_walk(acl_var_m, &acl_var_write, f); | |
059ec3d9 PH |
197 | |
198 | /* Now any other data that needs to be remembered. */ | |
199 | ||
200 | fprintf(f, "-body_linecount %d\n", body_linecount); | |
d677b2f2 | 201 | fprintf(f, "-max_received_linelength %d\n", max_received_linelength); |
059ec3d9 PH |
202 | |
203 | if (body_zerocount > 0) fprintf(f, "-body_zerocount %d\n", body_zerocount); | |
204 | ||
205 | if (authenticated_id != NULL) | |
206 | fprintf(f, "-auth_id %s\n", authenticated_id); | |
207 | if (authenticated_sender != NULL) | |
208 | fprintf(f, "-auth_sender %s\n", authenticated_sender); | |
209 | ||
210 | if (allow_unqualified_recipient) fprintf(f, "-allow_unqualified_recipient\n"); | |
211 | if (allow_unqualified_sender) fprintf(f, "-allow_unqualified_sender\n"); | |
212 | if (deliver_firsttime) fprintf(f, "-deliver_firsttime\n"); | |
19050083 | 213 | if (deliver_freeze) fprintf(f, "-frozen " TIME_T_FMT "\n", deliver_frozen_at); |
059ec3d9 | 214 | if (dont_deliver) fprintf(f, "-N\n"); |
b08b24c8 | 215 | if (host_lookup_deferred) fprintf(f, "-host_lookup_deferred\n"); |
059ec3d9 PH |
216 | if (host_lookup_failed) fprintf(f, "-host_lookup_failed\n"); |
217 | if (sender_local) fprintf(f, "-local\n"); | |
218 | if (local_error_message) fprintf(f, "-localerror\n"); | |
219 | if (local_scan_data != NULL) fprintf(f, "-local_scan %s\n", local_scan_data); | |
8523533c | 220 | #ifdef WITH_CONTENT_SCAN |
3481c572 JH |
221 | if (spam_bar) fprintf(f,"-spam_bar %s\n", spam_bar); |
222 | if (spam_score) fprintf(f,"-spam_score %s\n", spam_score); | |
223 | if (spam_score_int) fprintf(f,"-spam_score_int %s\n", spam_score_int); | |
8523533c | 224 | #endif |
059ec3d9 PH |
225 | if (deliver_manual_thaw) fprintf(f, "-manual_thaw\n"); |
226 | if (sender_set_untrusted) fprintf(f, "-sender_set_untrusted\n"); | |
227 | ||
8523533c TK |
228 | #ifdef EXPERIMENTAL_BRIGHTMAIL |
229 | if (bmi_verdicts != NULL) fprintf(f, "-bmi_verdicts %s\n", bmi_verdicts); | |
230 | #endif | |
231 | ||
059ec3d9 | 232 | #ifdef SUPPORT_TLS |
817d9f57 | 233 | if (tls_in.certificate_verified) fprintf(f, "-tls_certificate_verified\n"); |
9d1c15ef JH |
234 | if (tls_in.cipher) fprintf(f, "-tls_cipher %s\n", tls_in.cipher); |
235 | if (tls_in.peercert) | |
236 | { | |
237 | (void) tls_export_cert(big_buffer, big_buffer_size, tls_in.peercert); | |
238 | fprintf(f, "-tls_peercert %s\n", CS big_buffer); | |
239 | } | |
240 | if (tls_in.peerdn) fprintf(f, "-tls_peerdn %s\n", string_printing(tls_in.peerdn)); | |
241 | if (tls_in.sni) fprintf(f, "-tls_sni %s\n", string_printing(tls_in.sni)); | |
242 | if (tls_in.ourcert) | |
243 | { | |
244 | (void) tls_export_cert(big_buffer, big_buffer_size, tls_in.ourcert); | |
245 | fprintf(f, "-tls_ourcert %s\n", CS big_buffer); | |
246 | } | |
44662487 | 247 | if (tls_in.ocsp) fprintf(f, "-tls_ocsp %d\n", tls_in.ocsp); |
7be682ca | 248 | #endif |
059ec3d9 | 249 | |
7ade712c | 250 | #ifdef EXPERIMENTAL_INTERNATIONAL |
3c8b3577 JH |
251 | if (message_smtputf8) |
252 | { | |
253 | fprintf(f, "-smtputf8\n"); | |
254 | if (message_utf8_downconvert) | |
0ec7e948 | 255 | fprintf(f, "-utf8_%sdowncvt\n", message_utf8_downconvert < 0 ? "opt" : ""); |
3c8b3577 | 256 | } |
7ade712c JH |
257 | #endif |
258 | ||
6c1c3d1d WB |
259 | /* Write the dsn flags to the spool header file */ |
260 | DEBUG(D_deliver) debug_printf("DSN: Write SPOOL :-dsn_envid %s\n", dsn_envid); | |
261 | if (dsn_envid != NULL) fprintf(f, "-dsn_envid %s\n", dsn_envid); | |
262 | DEBUG(D_deliver) debug_printf("DSN: Write SPOOL :-dsn_ret %d\n", dsn_ret); | |
263 | if (dsn_ret != 0) fprintf(f, "-dsn_ret %d\n", dsn_ret); | |
6c1c3d1d | 264 | |
059ec3d9 PH |
265 | /* To complete the envelope, write out the tree of non-recipients, followed by |
266 | the list of recipients. These won't be disjoint the first time, when no | |
267 | checking has been done. If a recipient is a "one-time" alias, it is followed by | |
268 | a space and its parent address number (pno). */ | |
269 | ||
270 | tree_write(tree_nonrecipients, f); | |
271 | fprintf(f, "%d\n", recipients_count); | |
272 | for (i = 0; i < recipients_count; i++) | |
273 | { | |
274 | recipient_item *r = recipients_list + i; | |
6c1c3d1d | 275 | DEBUG(D_deliver) debug_printf("DSN: Flags :%d\n", r->dsn_flags); |
50dc7409 | 276 | if (r->pno < 0 && r->errors_to == NULL && r->dsn_flags == 0) |
059ec3d9 PH |
277 | fprintf(f, "%s\n", r->address); |
278 | else | |
279 | { | |
280 | uschar *errors_to = (r->errors_to == NULL)? US"" : r->errors_to; | |
6c1c3d1d WB |
281 | /* for DSN SUPPORT extend exim 4 spool in a compatible way by |
282 | adding new values upfront and add flag 0x02 */ | |
283 | uschar *orcpt = (r->orcpt == NULL)? US"" : r->orcpt; | |
284 | fprintf(f, "%s %s %d,%d %s %d,%d#3\n", r->address, orcpt, Ustrlen(orcpt), r->dsn_flags, | |
285 | errors_to, Ustrlen(errors_to), r->pno); | |
059ec3d9 | 286 | } |
6c1c3d1d | 287 | |
6c1c3d1d WB |
288 | DEBUG(D_deliver) debug_printf("DSN: **** SPOOL_OUT - address: |%s| errorsto: |%s| orcpt: |%s| dsn_flags: %d\n", |
289 | r->address, r->errors_to, r->orcpt, r->dsn_flags); | |
059ec3d9 PH |
290 | } |
291 | ||
292 | /* Put a blank line before the headers */ | |
293 | ||
294 | fprintf(f, "\n"); | |
295 | ||
296 | /* Save the size of the file so far so we can subtract it from the final length | |
297 | to get the actual size of the headers. */ | |
298 | ||
299 | fflush(f); | |
300 | fstat(fd, &statbuf); | |
301 | size_correction = statbuf.st_size; | |
302 | ||
303 | /* Finally, write out the message's headers. To make it easier to read them | |
304 | in again, precede each one with the count of its length. Make the count fixed | |
305 | length to aid human eyes when debugging and arrange for it not be included in | |
306 | the size. It is followed by a space for normal headers, a flagging letter for | |
307 | various other headers, or an asterisk for old headers that have been rewritten. | |
308 | These are saved as a record for debugging. Don't included them in the message's | |
309 | size. */ | |
310 | ||
311 | for (h = header_list; h != NULL; h = h->next) | |
312 | { | |
313 | fprintf(f, "%03d%c %s", h->slen, h->type, h->text); | |
314 | size_correction += 5; | |
315 | if (h->type == '*') size_correction += h->slen; | |
316 | } | |
317 | ||
318 | /* Flush and check for any errors while writing */ | |
319 | ||
320 | if (fflush(f) != 0 || ferror(f)) | |
321 | return spool_write_error(where, errmsg, US"write", temp_name, f); | |
322 | ||
323 | /* Force the file's contents to be written to disk. Note that fflush() | |
324 | just pushes it out of C, and fclose() doesn't guarantee to do the write | |
325 | either. That's just the way Unix works... */ | |
326 | ||
54fc8428 | 327 | if (EXIMfsync(fileno(f)) < 0) |
059ec3d9 PH |
328 | return spool_write_error(where, errmsg, US"sync", temp_name, f); |
329 | ||
330 | /* Get the size of the file, and close it. */ | |
331 | ||
332 | fstat(fd, &statbuf); | |
333 | if (fclose(f) != 0) | |
334 | return spool_write_error(where, errmsg, US"close", temp_name, NULL); | |
335 | ||
336 | /* Rename the file to its correct name, thereby replacing any previous | |
337 | incarnation. */ | |
338 | ||
339 | sprintf(CS name, "%s/input/%s/%s-H", spool_directory, message_subdir, id); | |
340 | ||
341 | if (Urename(temp_name, name) < 0) | |
342 | return spool_write_error(where, errmsg, US"rename", temp_name, NULL); | |
343 | ||
344 | /* Linux (and maybe other OS?) does not automatically sync a directory after | |
345 | an operation like rename. We therefore have to do it forcibly ourselves in | |
346 | these cases, to make sure the file is actually accessible on disk, as opposed | |
347 | to just the data being accessible from a file in lost+found. Linux also has | |
348 | O_DIRECTORY, for opening a directory. | |
349 | ||
350 | However, it turns out that some file systems (some versions of NFS?) do not | |
351 | support directory syncing. It seems safe enough to ignore EINVAL to cope with | |
352 | these cases. One hack on top of another... but that's life. */ | |
353 | ||
354 | #ifdef NEED_SYNC_DIRECTORY | |
355 | ||
356 | sprintf(CS temp_name, "%s/input/%s/.", spool_directory, message_subdir); | |
357 | ||
358 | #ifndef O_DIRECTORY | |
359 | #define O_DIRECTORY 0 | |
360 | #endif | |
361 | ||
362 | if ((fd = Uopen(temp_name, O_RDONLY|O_DIRECTORY, 0)) < 0) | |
363 | return spool_write_error(where, errmsg, US"directory open", name, NULL); | |
364 | ||
54fc8428 | 365 | if (EXIMfsync(fd) < 0 && errno != EINVAL) |
059ec3d9 PH |
366 | return spool_write_error(where, errmsg, US"directory sync", name, NULL); |
367 | ||
368 | if (close(fd) < 0) | |
369 | return spool_write_error(where, errmsg, US"directory close", name, NULL); | |
370 | ||
371 | #endif /* NEED_SYNC_DIRECTORY */ | |
372 | ||
373 | /* Return the number of characters in the headers, which is the file size, less | |
374 | the prelimary stuff, less the additional count fields on the headers. */ | |
375 | ||
376 | DEBUG(D_receive) debug_printf("Size of headers = %d\n", | |
377 | (int)(statbuf.st_size - size_correction)); | |
378 | ||
379 | return statbuf.st_size - size_correction; | |
380 | } | |
381 | ||
382 | ||
383 | #ifdef SUPPORT_MOVE_FROZEN_MESSAGES | |
384 | ||
385 | /************************************************ | |
386 | * Make a hard link * | |
387 | ************************************************/ | |
388 | ||
389 | /* Used by spool_move_message() below. Note re the use of sprintf(): the value | |
390 | of spool_directory is checked to ensure that it is less than 200 characters at | |
391 | start-up time. | |
392 | ||
393 | Arguments: | |
394 | dir base directory name | |
395 | subdir subdirectory name | |
396 | id message id | |
397 | suffix suffix to add to id | |
398 | from source directory prefix | |
399 | to destination directory prefix | |
400 | noentok if TRUE, absence of file is not an error | |
401 | ||
402 | Returns: TRUE if all went well | |
403 | FALSE, having panic logged if not | |
404 | */ | |
405 | ||
406 | static BOOL | |
407 | make_link(uschar *dir, uschar *subdir, uschar *id, uschar *suffix, uschar *from, | |
408 | uschar *to, BOOL noentok) | |
409 | { | |
410 | uschar f[256], t[256]; | |
411 | sprintf(CS f, "%s/%s%s/%s/%s%s", spool_directory, from, dir, subdir, id, suffix); | |
412 | sprintf(CS t, "%s/%s%s/%s/%s%s", spool_directory, to, dir, subdir, id, suffix); | |
413 | if (Ulink(f, t) < 0 && (!noentok || errno != ENOENT)) | |
414 | { | |
415 | log_write(0, LOG_MAIN|LOG_PANIC, "link(\"%s\", \"%s\") failed while moving " | |
416 | "message: %s", f, t, strerror(errno)); | |
417 | return FALSE; | |
418 | } | |
419 | return TRUE; | |
420 | } | |
421 | ||
422 | ||
423 | ||
424 | /************************************************ | |
425 | * Break a link * | |
426 | ************************************************/ | |
427 | ||
428 | /* Used by spool_move_message() below. Note re the use of sprintf(): the value | |
429 | of spool_directory is checked to ensure that it is less than 200 characters at | |
430 | start-up time. | |
431 | ||
432 | Arguments: | |
433 | dir base directory name | |
434 | subdir subdirectory name | |
435 | id message id | |
436 | suffix suffix to add to id | |
437 | from source directory prefix | |
438 | noentok if TRUE, absence of file is not an error | |
439 | ||
440 | Returns: TRUE if all went well | |
441 | FALSE, having panic logged if not | |
442 | */ | |
443 | ||
444 | static BOOL | |
445 | break_link(uschar *dir, uschar *subdir, uschar *id, uschar *suffix, uschar *from, | |
446 | BOOL noentok) | |
447 | { | |
448 | uschar f[256]; | |
449 | sprintf(CS f, "%s/%s%s/%s/%s%s", spool_directory, from, dir, subdir, id, suffix); | |
450 | if (Uunlink(f) < 0 && (!noentok || errno != ENOENT)) | |
451 | { | |
452 | log_write(0, LOG_MAIN|LOG_PANIC, "unlink(\"%s\") failed while moving " | |
453 | "message: %s", f, strerror(errno)); | |
454 | return FALSE; | |
455 | } | |
456 | return TRUE; | |
457 | } | |
458 | ||
459 | ||
460 | ||
461 | /************************************************ | |
462 | * Move message files * | |
463 | ************************************************/ | |
464 | ||
465 | /* Move the files for a message (-H, -D, and msglog) from one directory (or | |
466 | hierarchy) to another. It is assume that there is no -J file in existence when | |
467 | this is done. At present, this is used only when move_frozen_messages is set, | |
468 | so compile it only when that support is configured. | |
469 | ||
470 | Arguments: | |
471 | id the id of the message to be delivered | |
472 | subdir the subdirectory name, or an empty string | |
473 | from a prefix for "input" or "msglog" for where the message is now | |
474 | to a prefix for "input" or "msglog" for where the message is to go | |
475 | ||
476 | Returns: TRUE if all is well | |
477 | FALSE if not, with error logged in panic and main logs | |
478 | */ | |
479 | ||
480 | BOOL | |
481 | spool_move_message(uschar *id, uschar *subdir, uschar *from, uschar *to) | |
482 | { | |
483 | /* Create any output directories that do not exist. */ | |
484 | ||
485 | sprintf(CS big_buffer, "%sinput/%s", to, subdir); | |
486 | (void)directory_make(spool_directory, big_buffer, INPUT_DIRECTORY_MODE, TRUE); | |
487 | sprintf(CS big_buffer, "%smsglog/%s", to, subdir); | |
488 | (void)directory_make(spool_directory, big_buffer, INPUT_DIRECTORY_MODE, TRUE); | |
489 | ||
490 | /* Move the message by first creating new hard links for all the files, and | |
491 | then removing the old links. When moving messages onto the main spool, the -H | |
492 | file should be set up last, because that's the one that tells Exim there is a | |
493 | message to be delivered, so we create its new link last and remove its old link | |
494 | first. Programs that look at the alternate directories should follow the same | |
495 | rule of waiting for a -H file before doing anything. When moving messsages off | |
496 | the mail spool, the -D file should be open and locked at the time, thus keeping | |
497 | Exim's hands off. */ | |
498 | ||
499 | if (!make_link(US"msglog", subdir, id, US"", from, to, TRUE) || | |
500 | !make_link(US"input", subdir, id, US"-D", from, to, FALSE) || | |
501 | !make_link(US"input", subdir, id, US"-H", from, to, FALSE)) | |
502 | return FALSE; | |
503 | ||
504 | if (!break_link(US"input", subdir, id, US"-H", from, FALSE) || | |
505 | !break_link(US"input", subdir, id, US"-D", from, FALSE) || | |
506 | !break_link(US"msglog", subdir, id, US"", from, TRUE)) | |
507 | return FALSE; | |
508 | ||
509 | log_write(0, LOG_MAIN, "moved from %sinput, %smsglog to %sinput, %smsglog", | |
510 | from, from, to, to); | |
511 | ||
512 | return TRUE; | |
513 | } | |
514 | ||
515 | #endif | |
516 | ||
517 | /* End of spool_out.c */ | |
3c8b3577 JH |
518 | /* vi: aw ai sw=2 |
519 | */ |