Commit | Line | Data |
---|---|---|
059ec3d9 PH |
1 | /************************************************* |
2 | * Exim - an Internet mail transport agent * | |
3 | *************************************************/ | |
4 | ||
f9ba5e22 | 5 | /* Copyright (c) University of Cambridge 1995 - 2018 */ |
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 | |
f5d25c2b | 20 | errno still set. It creates an error message, depending on the circumstances. |
059ec3d9 PH |
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 | { | |
f5d25c2b JH |
39 | uschar *msg = where == SW_RECEIVING |
40 | ? string_sprintf("spool file %s error while receiving from %s: %s", s, | |
41 | sender_fullhost ? sender_fullhost : sender_ident, | |
42 | strerror(errno)) | |
43 | : string_sprintf("spool file %s error while %s: %s", s, | |
44 | where == SW_DELIVERING ? "delivering" : "modifying", | |
45 | strerror(errno)); | |
46 | ||
47 | if (temp_name) Uunlink(temp_name); | |
48 | if (f) (void)fclose(f); | |
49 | ||
50 | if (errmsg) | |
059ec3d9 | 51 | *errmsg = msg; |
f5d25c2b JH |
52 | else |
53 | log_write(0, LOG_MAIN|LOG_PANIC_DIE, "%s", msg); | |
059ec3d9 PH |
54 | |
55 | return -1; | |
56 | } | |
57 | ||
58 | ||
59 | ||
60 | /************************************************* | |
61 | * Open file under temporary name * | |
62 | *************************************************/ | |
63 | ||
64 | /* This is used for opening spool files under a temporary name, | |
65 | with a single attempt at deleting if they already exist. | |
66 | ||
67 | Argument: temporary name for spool header file | |
68 | Returns: file descriptor of open file, or < 0 on failure, with errno unchanged | |
69 | */ | |
70 | ||
71 | int | |
72 | spool_open_temp(uschar *temp_name) | |
73 | { | |
74 | int fd = Uopen(temp_name, O_RDWR|O_CREAT|O_EXCL, SPOOL_MODE); | |
75 | ||
76 | /* If the file already exists, something has gone wrong. This process may well | |
77 | have previously created the file if it is delivering more than one address, but | |
78 | it should have renamed it almost immediately. A file could, however, be left | |
79 | around as a result of a system crash, and by coincidence this process might | |
80 | have the same pid. We therefore have one go at unlinking it before giving up. | |
81 | */ | |
82 | ||
83 | if (fd < 0 && errno == EEXIST) | |
84 | { | |
85 | DEBUG(D_any) debug_printf("%s exists: unlinking\n", temp_name); | |
86 | Uunlink(temp_name); | |
87 | fd = Uopen(temp_name, O_RDWR|O_CREAT|O_EXCL, SPOOL_MODE); | |
88 | } | |
89 | ||
90 | /* If the file has been opened, make sure the file's group is the Exim gid, and | |
91 | double-check the mode because the group setting doesn't always get set | |
92 | automatically. */ | |
93 | ||
94 | if (fd >= 0) | |
b66fecb4 | 95 | if (exim_fchown(fd, exim_uid, exim_gid, temp_name) || fchmod(fd, SPOOL_MODE)) |
1ac6b2e7 JH |
96 | { |
97 | DEBUG(D_any) debug_printf("failed setting perms on %s\n", temp_name); | |
98 | (void) close(fd); fd = -1; | |
99 | Uunlink(temp_name); | |
100 | } | |
059ec3d9 PH |
101 | |
102 | return fd; | |
103 | } | |
104 | ||
105 | ||
106 | ||
107 | /************************************************* | |
108 | * Write the header spool file * | |
109 | *************************************************/ | |
110 | ||
111 | /* Returns the size of the file for success; zero for failure. The file is | |
112 | written under a temporary name, and then renamed. It's done this way so that it | |
113 | works with re-writing the file on message deferral as well as for the initial | |
114 | write. Whenever this function is called, the data file for the message should | |
115 | be open and locked, thus preventing any other exim process from working on this | |
116 | message. | |
117 | ||
118 | Argument: | |
119 | id the message id | |
120 | where SW_RECEIVING, SW_DELIVERING, or SW_MODIFYING | |
121 | errmsg where to put an error message; if NULL, panic-die on error | |
122 | ||
123 | Returns: the size of the header texts on success; | |
124 | negative on writing failure, unless errmsg == NULL | |
125 | */ | |
126 | ||
127 | int | |
128 | spool_write_header(uschar *id, int where, uschar **errmsg) | |
129 | { | |
130 | int fd; | |
059ec3d9 | 131 | int size_correction; |
8768d548 | 132 | FILE * fp; |
059ec3d9 | 133 | struct stat statbuf; |
41313d92 JH |
134 | uschar * tname; |
135 | uschar * fname; | |
059ec3d9 | 136 | |
cb80814d | 137 | tname = spool_fname(US"input", message_subdir, US"hdr.", message_id); |
a2da3176 | 138 | |
41313d92 | 139 | if ((fd = spool_open_temp(tname)) < 0) |
a2da3176 | 140 | return spool_write_error(where, errmsg, US"open", NULL, NULL); |
8768d548 | 141 | fp = fdopen(fd, "wb"); |
41313d92 | 142 | DEBUG(D_receive|D_deliver) debug_printf("Writing spool header file: %s\n", tname); |
059ec3d9 PH |
143 | |
144 | /* We now have an open file to which the header data is to be written. Start | |
145 | with the file's leaf name, to make the file self-identifying. Continue with the | |
146 | identity of the submitting user, followed by the sender's address. The sender's | |
147 | address is enclosed in <> because it might be the null address. Then write the | |
148 | received time and the number of warning messages that have been sent. */ | |
149 | ||
8768d548 JH |
150 | fprintf(fp, "%s-H\n", message_id); |
151 | fprintf(fp, "%.63s %ld %ld\n", originator_login, (long int)originator_uid, | |
059ec3d9 | 152 | (long int)originator_gid); |
8768d548 JH |
153 | fprintf(fp, "<%s>\n", sender_address); |
154 | fprintf(fp, "%d %d\n", (int)received_time.tv_sec, warning_count); | |
32dfdf8b | 155 | |
8768d548 | 156 | fprintf(fp, "-received_time_usec .%06d\n", (int)received_time.tv_usec); |
059ec3d9 PH |
157 | |
158 | /* If there is information about a sending host, remember it. The HELO | |
159 | data can be set for local SMTP as well as remote. */ | |
160 | ||
32dfdf8b | 161 | if (sender_helo_name) |
8768d548 | 162 | fprintf(fp, "-helo_name %s\n", sender_helo_name); |
059ec3d9 | 163 | |
32dfdf8b | 164 | if (sender_host_address) |
059ec3d9 | 165 | { |
8768d548 | 166 | fprintf(fp, "-host_address %s.%d\n", sender_host_address, sender_host_port); |
32dfdf8b | 167 | if (sender_host_name) |
8768d548 | 168 | fprintf(fp, "-host_name %s\n", sender_host_name); |
32dfdf8b | 169 | if (sender_host_authenticated) |
8768d548 | 170 | fprintf(fp, "-host_auth %s\n", sender_host_authenticated); |
059ec3d9 PH |
171 | } |
172 | ||
173 | /* Also about the interface a message came in on */ | |
174 | ||
32dfdf8b | 175 | if (interface_address) |
8768d548 | 176 | fprintf(fp, "-interface_address %s.%d\n", interface_address, interface_port); |
8e669ac1 | 177 | |
1f5b4c3d | 178 | if (smtp_active_hostname != primary_hostname) |
8768d548 | 179 | fprintf(fp, "-active_hostname %s\n", smtp_active_hostname); |
059ec3d9 PH |
180 | |
181 | /* Likewise for any ident information; for local messages this is | |
182 | likely to be the same as originator_login, but will be different if | |
183 | the originator was root, forcing a different ident. */ | |
184 | ||
8768d548 | 185 | if (sender_ident) fprintf(fp, "-ident %s\n", sender_ident); |
059ec3d9 PH |
186 | |
187 | /* Ditto for the received protocol */ | |
188 | ||
32dfdf8b | 189 | if (received_protocol) |
8768d548 | 190 | fprintf(fp, "-received_protocol %s\n", received_protocol); |
059ec3d9 | 191 | |
38a0a95f | 192 | /* Preserve any ACL variables that are set. */ |
059ec3d9 | 193 | |
8768d548 JH |
194 | tree_walk(acl_var_c, &acl_var_write, fp); |
195 | tree_walk(acl_var_m, &acl_var_write, fp); | |
059ec3d9 PH |
196 | |
197 | /* Now any other data that needs to be remembered. */ | |
198 | ||
8768d548 JH |
199 | if (f.spool_file_wireformat) |
200 | fprintf(fp, "-spool_file_wireformat\n"); | |
328c5688 | 201 | else |
8768d548 JH |
202 | fprintf(fp, "-body_linecount %d\n", body_linecount); |
203 | fprintf(fp, "-max_received_linelength %d\n", max_received_linelength); | |
059ec3d9 | 204 | |
8768d548 | 205 | if (body_zerocount > 0) fprintf(fp, "-body_zerocount %d\n", body_zerocount); |
059ec3d9 | 206 | |
32dfdf8b | 207 | if (authenticated_id) |
8768d548 | 208 | fprintf(fp, "-auth_id %s\n", authenticated_id); |
32dfdf8b | 209 | if (authenticated_sender) |
8768d548 JH |
210 | fprintf(fp, "-auth_sender %s\n", authenticated_sender); |
211 | ||
212 | if (f.allow_unqualified_recipient) fprintf(fp, "-allow_unqualified_recipient\n"); | |
213 | if (f.allow_unqualified_sender) fprintf(fp, "-allow_unqualified_sender\n"); | |
214 | if (f.deliver_firsttime) fprintf(fp, "-deliver_firsttime\n"); | |
215 | if (f.deliver_freeze) fprintf(fp, "-frozen " TIME_T_FMT "\n", deliver_frozen_at); | |
216 | if (f.dont_deliver) fprintf(fp, "-N\n"); | |
217 | if (host_lookup_deferred) fprintf(fp, "-host_lookup_deferred\n"); | |
218 | if (host_lookup_failed) fprintf(fp, "-host_lookup_failed\n"); | |
219 | if (f.sender_local) fprintf(fp, "-local\n"); | |
220 | if (f.local_error_message) fprintf(fp, "-localerror\n"); | |
9723f966 | 221 | #ifdef HAVE_LOCAL_SCAN |
8768d548 | 222 | if (local_scan_data) fprintf(fp, "-local_scan %s\n", local_scan_data); |
9723f966 | 223 | #endif |
8523533c | 224 | #ifdef WITH_CONTENT_SCAN |
8768d548 JH |
225 | if (spam_bar) fprintf(fp,"-spam_bar %s\n", spam_bar); |
226 | if (spam_score) fprintf(fp,"-spam_score %s\n", spam_score); | |
227 | if (spam_score_int) fprintf(fp,"-spam_score_int %s\n", spam_score_int); | |
8523533c | 228 | #endif |
8768d548 JH |
229 | if (f.deliver_manual_thaw) fprintf(fp, "-manual_thaw\n"); |
230 | if (f.sender_set_untrusted) fprintf(fp, "-sender_set_untrusted\n"); | |
059ec3d9 | 231 | |
8523533c | 232 | #ifdef EXPERIMENTAL_BRIGHTMAIL |
8768d548 | 233 | if (bmi_verdicts) fprintf(fp, "-bmi_verdicts %s\n", bmi_verdicts); |
8523533c TK |
234 | #endif |
235 | ||
059ec3d9 | 236 | #ifdef SUPPORT_TLS |
8768d548 JH |
237 | if (tls_in.certificate_verified) fprintf(fp, "-tls_certificate_verified\n"); |
238 | if (tls_in.cipher) fprintf(fp, "-tls_cipher %s\n", tls_in.cipher); | |
9d1c15ef JH |
239 | if (tls_in.peercert) |
240 | { | |
241 | (void) tls_export_cert(big_buffer, big_buffer_size, tls_in.peercert); | |
8768d548 | 242 | fprintf(fp, "-tls_peercert %s\n", CS big_buffer); |
9d1c15ef | 243 | } |
8768d548 JH |
244 | if (tls_in.peerdn) fprintf(fp, "-tls_peerdn %s\n", string_printing(tls_in.peerdn)); |
245 | if (tls_in.sni) fprintf(fp, "-tls_sni %s\n", string_printing(tls_in.sni)); | |
9d1c15ef JH |
246 | if (tls_in.ourcert) |
247 | { | |
248 | (void) tls_export_cert(big_buffer, big_buffer_size, tls_in.ourcert); | |
8768d548 | 249 | fprintf(fp, "-tls_ourcert %s\n", CS big_buffer); |
9d1c15ef | 250 | } |
8768d548 | 251 | if (tls_in.ocsp) fprintf(fp, "-tls_ocsp %d\n", tls_in.ocsp); |
7be682ca | 252 | #endif |
059ec3d9 | 253 | |
8c5d388a | 254 | #ifdef SUPPORT_I18N |
3c8b3577 JH |
255 | if (message_smtputf8) |
256 | { | |
8768d548 | 257 | fprintf(fp, "-smtputf8\n"); |
3c8b3577 | 258 | if (message_utf8_downconvert) |
8768d548 | 259 | fprintf(fp, "-utf8_%sdowncvt\n", message_utf8_downconvert < 0 ? "opt" : ""); |
3c8b3577 | 260 | } |
7ade712c JH |
261 | #endif |
262 | ||
6c1c3d1d WB |
263 | /* Write the dsn flags to the spool header file */ |
264 | DEBUG(D_deliver) debug_printf("DSN: Write SPOOL :-dsn_envid %s\n", dsn_envid); | |
8768d548 | 265 | if (dsn_envid) fprintf(fp, "-dsn_envid %s\n", dsn_envid); |
6c1c3d1d | 266 | DEBUG(D_deliver) debug_printf("DSN: Write SPOOL :-dsn_ret %d\n", dsn_ret); |
8768d548 | 267 | if (dsn_ret) fprintf(fp, "-dsn_ret %d\n", dsn_ret); |
6c1c3d1d | 268 | |
059ec3d9 PH |
269 | /* To complete the envelope, write out the tree of non-recipients, followed by |
270 | the list of recipients. These won't be disjoint the first time, when no | |
271 | checking has been done. If a recipient is a "one-time" alias, it is followed by | |
272 | a space and its parent address number (pno). */ | |
273 | ||
8768d548 JH |
274 | tree_write(tree_nonrecipients, fp); |
275 | fprintf(fp, "%d\n", recipients_count); | |
d7978c0f | 276 | for (int i = 0; i < recipients_count; i++) |
059ec3d9 PH |
277 | { |
278 | recipient_item *r = recipients_list + i; | |
6e3b198d JH |
279 | |
280 | DEBUG(D_deliver) debug_printf("DSN: Flags :%d\n", r->dsn_flags); | |
281 | ||
50dc7409 | 282 | if (r->pno < 0 && r->errors_to == NULL && r->dsn_flags == 0) |
8768d548 | 283 | fprintf(fp, "%s\n", r->address); |
059ec3d9 PH |
284 | else |
285 | { | |
6e3b198d | 286 | uschar * errors_to = r->errors_to ? r->errors_to : US""; |
6c1c3d1d | 287 | /* for DSN SUPPORT extend exim 4 spool in a compatible way by |
6e3b198d JH |
288 | adding new values upfront and add flag 0x02 */ |
289 | uschar * orcpt = r->orcpt ? r->orcpt : US""; | |
290 | ||
8768d548 | 291 | fprintf(fp, "%s %s %d,%d %s %d,%d#3\n", r->address, orcpt, Ustrlen(orcpt), |
6e3b198d | 292 | r->dsn_flags, errors_to, Ustrlen(errors_to), r->pno); |
059ec3d9 | 293 | } |
94431adb | 294 | |
6e3b198d JH |
295 | DEBUG(D_deliver) debug_printf("DSN: **** SPOOL_OUT - " |
296 | "address: |%s| errorsto: |%s| orcpt: |%s| dsn_flags: %d\n", | |
297 | r->address, r->errors_to, r->orcpt, r->dsn_flags); | |
059ec3d9 PH |
298 | } |
299 | ||
300 | /* Put a blank line before the headers */ | |
301 | ||
8768d548 | 302 | fprintf(fp, "\n"); |
059ec3d9 PH |
303 | |
304 | /* Save the size of the file so far so we can subtract it from the final length | |
305 | to get the actual size of the headers. */ | |
306 | ||
8768d548 | 307 | fflush(fp); |
6e3b198d | 308 | if (fstat(fd, &statbuf)) |
8768d548 | 309 | return spool_write_error(where, errmsg, US"fstat", tname, fp); |
059ec3d9 PH |
310 | size_correction = statbuf.st_size; |
311 | ||
312 | /* Finally, write out the message's headers. To make it easier to read them | |
313 | in again, precede each one with the count of its length. Make the count fixed | |
314 | length to aid human eyes when debugging and arrange for it not be included in | |
315 | the size. It is followed by a space for normal headers, a flagging letter for | |
316 | various other headers, or an asterisk for old headers that have been rewritten. | |
317 | These are saved as a record for debugging. Don't included them in the message's | |
318 | size. */ | |
319 | ||
d7978c0f | 320 | for (header_line * h = header_list; h; h = h->next) |
059ec3d9 | 321 | { |
8768d548 | 322 | fprintf(fp, "%03d%c %s", h->slen, h->type, h->text); |
059ec3d9 PH |
323 | size_correction += 5; |
324 | if (h->type == '*') size_correction += h->slen; | |
325 | } | |
326 | ||
327 | /* Flush and check for any errors while writing */ | |
328 | ||
8768d548 JH |
329 | if (fflush(fp) != 0 || ferror(fp)) |
330 | return spool_write_error(where, errmsg, US"write", tname, fp); | |
059ec3d9 PH |
331 | |
332 | /* Force the file's contents to be written to disk. Note that fflush() | |
333 | just pushes it out of C, and fclose() doesn't guarantee to do the write | |
334 | either. That's just the way Unix works... */ | |
335 | ||
8768d548 JH |
336 | if (EXIMfsync(fileno(fp)) < 0) |
337 | return spool_write_error(where, errmsg, US"sync", tname, fp); | |
059ec3d9 PH |
338 | |
339 | /* Get the size of the file, and close it. */ | |
340 | ||
d4ff61d1 | 341 | if (fstat(fd, &statbuf) != 0) |
41313d92 | 342 | return spool_write_error(where, errmsg, US"fstat", tname, NULL); |
8768d548 | 343 | if (fclose(fp) != 0) |
41313d92 | 344 | return spool_write_error(where, errmsg, US"close", tname, NULL); |
059ec3d9 PH |
345 | |
346 | /* Rename the file to its correct name, thereby replacing any previous | |
347 | incarnation. */ | |
348 | ||
41313d92 JH |
349 | fname = spool_fname(US"input", message_subdir, id, US"-H"); |
350 | DEBUG(D_receive|D_deliver) debug_printf("Renaming spool header file: %s\n", fname); | |
059ec3d9 | 351 | |
41313d92 JH |
352 | if (Urename(tname, fname) < 0) |
353 | return spool_write_error(where, errmsg, US"rename", tname, NULL); | |
059ec3d9 PH |
354 | |
355 | /* Linux (and maybe other OS?) does not automatically sync a directory after | |
356 | an operation like rename. We therefore have to do it forcibly ourselves in | |
357 | these cases, to make sure the file is actually accessible on disk, as opposed | |
358 | to just the data being accessible from a file in lost+found. Linux also has | |
359 | O_DIRECTORY, for opening a directory. | |
360 | ||
361 | However, it turns out that some file systems (some versions of NFS?) do not | |
362 | support directory syncing. It seems safe enough to ignore EINVAL to cope with | |
363 | these cases. One hack on top of another... but that's life. */ | |
364 | ||
365 | #ifdef NEED_SYNC_DIRECTORY | |
366 | ||
41313d92 | 367 | tname = spool_fname(US"input", message_subdir, US".", US""); |
059ec3d9 | 368 | |
41313d92 JH |
369 | # ifndef O_DIRECTORY |
370 | # define O_DIRECTORY 0 | |
371 | # endif | |
059ec3d9 | 372 | |
41313d92 JH |
373 | if ((fd = Uopen(tname, O_RDONLY|O_DIRECTORY, 0)) < 0) |
374 | return spool_write_error(where, errmsg, US"directory open", fname, NULL); | |
059ec3d9 | 375 | |
54fc8428 | 376 | if (EXIMfsync(fd) < 0 && errno != EINVAL) |
41313d92 | 377 | return spool_write_error(where, errmsg, US"directory sync", fname, NULL); |
059ec3d9 PH |
378 | |
379 | if (close(fd) < 0) | |
41313d92 | 380 | return spool_write_error(where, errmsg, US"directory close", fname, NULL); |
059ec3d9 PH |
381 | |
382 | #endif /* NEED_SYNC_DIRECTORY */ | |
383 | ||
384 | /* Return the number of characters in the headers, which is the file size, less | |
4c04137d | 385 | the preliminary stuff, less the additional count fields on the headers. */ |
059ec3d9 PH |
386 | |
387 | DEBUG(D_receive) debug_printf("Size of headers = %d\n", | |
388 | (int)(statbuf.st_size - size_correction)); | |
389 | ||
390 | return statbuf.st_size - size_correction; | |
391 | } | |
392 | ||
393 | ||
394 | #ifdef SUPPORT_MOVE_FROZEN_MESSAGES | |
395 | ||
396 | /************************************************ | |
397 | * Make a hard link * | |
398 | ************************************************/ | |
399 | ||
400 | /* Used by spool_move_message() below. Note re the use of sprintf(): the value | |
401 | of spool_directory is checked to ensure that it is less than 200 characters at | |
402 | start-up time. | |
403 | ||
404 | Arguments: | |
405 | dir base directory name | |
406 | subdir subdirectory name | |
407 | id message id | |
408 | suffix suffix to add to id | |
409 | from source directory prefix | |
410 | to destination directory prefix | |
411 | noentok if TRUE, absence of file is not an error | |
412 | ||
413 | Returns: TRUE if all went well | |
414 | FALSE, having panic logged if not | |
415 | */ | |
416 | ||
417 | static BOOL | |
418 | make_link(uschar *dir, uschar *subdir, uschar *id, uschar *suffix, uschar *from, | |
419 | uschar *to, BOOL noentok) | |
420 | { | |
41313d92 JH |
421 | uschar * fname = spool_fname(string_sprintf("%s%s", from, dir), subdir, id, suffix); |
422 | uschar * tname = spool_fname(string_sprintf("%s%s", to, dir), subdir, id, suffix); | |
423 | if (Ulink(fname, tname) < 0 && (!noentok || errno != ENOENT)) | |
059ec3d9 PH |
424 | { |
425 | log_write(0, LOG_MAIN|LOG_PANIC, "link(\"%s\", \"%s\") failed while moving " | |
41313d92 | 426 | "message: %s", fname, tname, strerror(errno)); |
059ec3d9 PH |
427 | return FALSE; |
428 | } | |
429 | return TRUE; | |
430 | } | |
431 | ||
432 | ||
433 | ||
434 | /************************************************ | |
435 | * Break a link * | |
436 | ************************************************/ | |
437 | ||
438 | /* Used by spool_move_message() below. Note re the use of sprintf(): the value | |
439 | of spool_directory is checked to ensure that it is less than 200 characters at | |
440 | start-up time. | |
441 | ||
442 | Arguments: | |
443 | dir base directory name | |
444 | subdir subdirectory name | |
445 | id message id | |
446 | suffix suffix to add to id | |
447 | from source directory prefix | |
448 | noentok if TRUE, absence of file is not an error | |
449 | ||
450 | Returns: TRUE if all went well | |
451 | FALSE, having panic logged if not | |
452 | */ | |
453 | ||
454 | static BOOL | |
455 | break_link(uschar *dir, uschar *subdir, uschar *id, uschar *suffix, uschar *from, | |
456 | BOOL noentok) | |
457 | { | |
41313d92 JH |
458 | uschar * fname = spool_fname(string_sprintf("%s%s", from, dir), subdir, id, suffix); |
459 | if (Uunlink(fname) < 0 && (!noentok || errno != ENOENT)) | |
059ec3d9 PH |
460 | { |
461 | log_write(0, LOG_MAIN|LOG_PANIC, "unlink(\"%s\") failed while moving " | |
41313d92 | 462 | "message: %s", fname, strerror(errno)); |
059ec3d9 PH |
463 | return FALSE; |
464 | } | |
465 | return TRUE; | |
466 | } | |
467 | ||
468 | ||
469 | ||
470 | /************************************************ | |
471 | * Move message files * | |
472 | ************************************************/ | |
473 | ||
474 | /* Move the files for a message (-H, -D, and msglog) from one directory (or | |
475 | hierarchy) to another. It is assume that there is no -J file in existence when | |
476 | this is done. At present, this is used only when move_frozen_messages is set, | |
477 | so compile it only when that support is configured. | |
478 | ||
479 | Arguments: | |
480 | id the id of the message to be delivered | |
481 | subdir the subdirectory name, or an empty string | |
482 | from a prefix for "input" or "msglog" for where the message is now | |
483 | to a prefix for "input" or "msglog" for where the message is to go | |
484 | ||
485 | Returns: TRUE if all is well | |
486 | FALSE if not, with error logged in panic and main logs | |
487 | */ | |
488 | ||
489 | BOOL | |
490 | spool_move_message(uschar *id, uschar *subdir, uschar *from, uschar *to) | |
491 | { | |
492 | /* Create any output directories that do not exist. */ | |
493 | ||
41313d92 JH |
494 | (void) directory_make(spool_directory, |
495 | spool_sname(string_sprintf("%sinput", to), subdir), | |
496 | INPUT_DIRECTORY_MODE, TRUE); | |
497 | (void) directory_make(spool_directory, | |
498 | spool_sname(string_sprintf("%smsglog", to), subdir), | |
499 | INPUT_DIRECTORY_MODE, TRUE); | |
059ec3d9 PH |
500 | |
501 | /* Move the message by first creating new hard links for all the files, and | |
502 | then removing the old links. When moving messages onto the main spool, the -H | |
503 | file should be set up last, because that's the one that tells Exim there is a | |
504 | message to be delivered, so we create its new link last and remove its old link | |
505 | first. Programs that look at the alternate directories should follow the same | |
85ffcba6 | 506 | rule of waiting for a -H file before doing anything. When moving messages off |
059ec3d9 PH |
507 | the mail spool, the -D file should be open and locked at the time, thus keeping |
508 | Exim's hands off. */ | |
509 | ||
510 | if (!make_link(US"msglog", subdir, id, US"", from, to, TRUE) || | |
511 | !make_link(US"input", subdir, id, US"-D", from, to, FALSE) || | |
512 | !make_link(US"input", subdir, id, US"-H", from, to, FALSE)) | |
513 | return FALSE; | |
514 | ||
515 | if (!break_link(US"input", subdir, id, US"-H", from, FALSE) || | |
516 | !break_link(US"input", subdir, id, US"-D", from, FALSE) || | |
517 | !break_link(US"msglog", subdir, id, US"", from, TRUE)) | |
518 | return FALSE; | |
519 | ||
520 | log_write(0, LOG_MAIN, "moved from %sinput, %smsglog to %sinput, %smsglog", | |
521 | from, from, to, to); | |
522 | ||
523 | return TRUE; | |
524 | } | |
525 | ||
526 | #endif | |
527 | ||
528 | /* End of spool_out.c */ | |
3c8b3577 JH |
529 | /* vi: aw ai sw=2 |
530 | */ |