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) | |
1ac6b2e7 JH |
95 | if (fchown(fd, exim_uid, exim_gid) || fchmod(fd, SPOOL_MODE)) |
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 | |
41313d92 JH |
137 | tname = spool_fname(US"input", message_subdir, |
138 | string_sprintf("hdr.%d", (int)getpid()), US""); | |
a2da3176 | 139 | |
41313d92 | 140 | if ((fd = spool_open_temp(tname)) < 0) |
a2da3176 | 141 | return spool_write_error(where, errmsg, US"open", NULL, NULL); |
8768d548 | 142 | fp = fdopen(fd, "wb"); |
41313d92 | 143 | DEBUG(D_receive|D_deliver) debug_printf("Writing spool header file: %s\n", tname); |
059ec3d9 PH |
144 | |
145 | /* We now have an open file to which the header data is to be written. Start | |
146 | with the file's leaf name, to make the file self-identifying. Continue with the | |
147 | identity of the submitting user, followed by the sender's address. The sender's | |
148 | address is enclosed in <> because it might be the null address. Then write the | |
149 | received time and the number of warning messages that have been sent. */ | |
150 | ||
8768d548 JH |
151 | fprintf(fp, "%s-H\n", message_id); |
152 | fprintf(fp, "%.63s %ld %ld\n", originator_login, (long int)originator_uid, | |
059ec3d9 | 153 | (long int)originator_gid); |
8768d548 JH |
154 | fprintf(fp, "<%s>\n", sender_address); |
155 | fprintf(fp, "%d %d\n", (int)received_time.tv_sec, warning_count); | |
32dfdf8b | 156 | |
8768d548 | 157 | fprintf(fp, "-received_time_usec .%06d\n", (int)received_time.tv_usec); |
059ec3d9 PH |
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 | ||
32dfdf8b | 162 | if (sender_helo_name) |
8768d548 | 163 | fprintf(fp, "-helo_name %s\n", sender_helo_name); |
059ec3d9 | 164 | |
32dfdf8b | 165 | if (sender_host_address) |
059ec3d9 | 166 | { |
8768d548 | 167 | fprintf(fp, "-host_address %s.%d\n", sender_host_address, sender_host_port); |
32dfdf8b | 168 | if (sender_host_name) |
8768d548 | 169 | fprintf(fp, "-host_name %s\n", sender_host_name); |
32dfdf8b | 170 | if (sender_host_authenticated) |
8768d548 | 171 | fprintf(fp, "-host_auth %s\n", sender_host_authenticated); |
059ec3d9 PH |
172 | } |
173 | ||
174 | /* Also about the interface a message came in on */ | |
175 | ||
32dfdf8b | 176 | if (interface_address) |
8768d548 | 177 | fprintf(fp, "-interface_address %s.%d\n", interface_address, interface_port); |
8e669ac1 | 178 | |
1f5b4c3d | 179 | if (smtp_active_hostname != primary_hostname) |
8768d548 | 180 | fprintf(fp, "-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 | ||
8768d548 | 186 | if (sender_ident) fprintf(fp, "-ident %s\n", sender_ident); |
059ec3d9 PH |
187 | |
188 | /* Ditto for the received protocol */ | |
189 | ||
32dfdf8b | 190 | if (received_protocol) |
8768d548 | 191 | fprintf(fp, "-received_protocol %s\n", received_protocol); |
059ec3d9 | 192 | |
38a0a95f | 193 | /* Preserve any ACL variables that are set. */ |
059ec3d9 | 194 | |
8768d548 JH |
195 | tree_walk(acl_var_c, &acl_var_write, fp); |
196 | tree_walk(acl_var_m, &acl_var_write, fp); | |
059ec3d9 PH |
197 | |
198 | /* Now any other data that needs to be remembered. */ | |
199 | ||
8768d548 JH |
200 | if (f.spool_file_wireformat) |
201 | fprintf(fp, "-spool_file_wireformat\n"); | |
328c5688 | 202 | else |
8768d548 JH |
203 | fprintf(fp, "-body_linecount %d\n", body_linecount); |
204 | fprintf(fp, "-max_received_linelength %d\n", max_received_linelength); | |
059ec3d9 | 205 | |
8768d548 | 206 | if (body_zerocount > 0) fprintf(fp, "-body_zerocount %d\n", body_zerocount); |
059ec3d9 | 207 | |
32dfdf8b | 208 | if (authenticated_id) |
8768d548 | 209 | fprintf(fp, "-auth_id %s\n", authenticated_id); |
32dfdf8b | 210 | if (authenticated_sender) |
8768d548 JH |
211 | fprintf(fp, "-auth_sender %s\n", authenticated_sender); |
212 | ||
213 | if (f.allow_unqualified_recipient) fprintf(fp, "-allow_unqualified_recipient\n"); | |
214 | if (f.allow_unqualified_sender) fprintf(fp, "-allow_unqualified_sender\n"); | |
215 | if (f.deliver_firsttime) fprintf(fp, "-deliver_firsttime\n"); | |
216 | if (f.deliver_freeze) fprintf(fp, "-frozen " TIME_T_FMT "\n", deliver_frozen_at); | |
217 | if (f.dont_deliver) fprintf(fp, "-N\n"); | |
218 | if (host_lookup_deferred) fprintf(fp, "-host_lookup_deferred\n"); | |
219 | if (host_lookup_failed) fprintf(fp, "-host_lookup_failed\n"); | |
220 | if (f.sender_local) fprintf(fp, "-local\n"); | |
221 | if (f.local_error_message) fprintf(fp, "-localerror\n"); | |
9723f966 | 222 | #ifdef HAVE_LOCAL_SCAN |
8768d548 | 223 | if (local_scan_data) fprintf(fp, "-local_scan %s\n", local_scan_data); |
9723f966 | 224 | #endif |
8523533c | 225 | #ifdef WITH_CONTENT_SCAN |
8768d548 JH |
226 | if (spam_bar) fprintf(fp,"-spam_bar %s\n", spam_bar); |
227 | if (spam_score) fprintf(fp,"-spam_score %s\n", spam_score); | |
228 | if (spam_score_int) fprintf(fp,"-spam_score_int %s\n", spam_score_int); | |
8523533c | 229 | #endif |
8768d548 JH |
230 | if (f.deliver_manual_thaw) fprintf(fp, "-manual_thaw\n"); |
231 | if (f.sender_set_untrusted) fprintf(fp, "-sender_set_untrusted\n"); | |
059ec3d9 | 232 | |
8523533c | 233 | #ifdef EXPERIMENTAL_BRIGHTMAIL |
8768d548 | 234 | if (bmi_verdicts) fprintf(fp, "-bmi_verdicts %s\n", bmi_verdicts); |
8523533c TK |
235 | #endif |
236 | ||
059ec3d9 | 237 | #ifdef SUPPORT_TLS |
8768d548 JH |
238 | if (tls_in.certificate_verified) fprintf(fp, "-tls_certificate_verified\n"); |
239 | if (tls_in.cipher) fprintf(fp, "-tls_cipher %s\n", tls_in.cipher); | |
9d1c15ef JH |
240 | if (tls_in.peercert) |
241 | { | |
242 | (void) tls_export_cert(big_buffer, big_buffer_size, tls_in.peercert); | |
8768d548 | 243 | fprintf(fp, "-tls_peercert %s\n", CS big_buffer); |
9d1c15ef | 244 | } |
8768d548 JH |
245 | if (tls_in.peerdn) fprintf(fp, "-tls_peerdn %s\n", string_printing(tls_in.peerdn)); |
246 | if (tls_in.sni) fprintf(fp, "-tls_sni %s\n", string_printing(tls_in.sni)); | |
9d1c15ef JH |
247 | if (tls_in.ourcert) |
248 | { | |
249 | (void) tls_export_cert(big_buffer, big_buffer_size, tls_in.ourcert); | |
8768d548 | 250 | fprintf(fp, "-tls_ourcert %s\n", CS big_buffer); |
9d1c15ef | 251 | } |
8768d548 | 252 | if (tls_in.ocsp) fprintf(fp, "-tls_ocsp %d\n", tls_in.ocsp); |
8ac90765 JH |
253 | |
254 | # ifdef EXPERIMENTAL_REQUIRETLS | |
8768d548 | 255 | if (tls_requiretls) fprintf(fp, "-tls_requiretls 0x%x\n", tls_requiretls); |
8ac90765 | 256 | # endif |
7be682ca | 257 | #endif |
059ec3d9 | 258 | |
8c5d388a | 259 | #ifdef SUPPORT_I18N |
3c8b3577 JH |
260 | if (message_smtputf8) |
261 | { | |
8768d548 | 262 | fprintf(fp, "-smtputf8\n"); |
3c8b3577 | 263 | if (message_utf8_downconvert) |
8768d548 | 264 | fprintf(fp, "-utf8_%sdowncvt\n", message_utf8_downconvert < 0 ? "opt" : ""); |
3c8b3577 | 265 | } |
7ade712c JH |
266 | #endif |
267 | ||
6c1c3d1d WB |
268 | /* Write the dsn flags to the spool header file */ |
269 | DEBUG(D_deliver) debug_printf("DSN: Write SPOOL :-dsn_envid %s\n", dsn_envid); | |
8768d548 | 270 | if (dsn_envid) fprintf(fp, "-dsn_envid %s\n", dsn_envid); |
6c1c3d1d | 271 | DEBUG(D_deliver) debug_printf("DSN: Write SPOOL :-dsn_ret %d\n", dsn_ret); |
8768d548 | 272 | if (dsn_ret) fprintf(fp, "-dsn_ret %d\n", dsn_ret); |
6c1c3d1d | 273 | |
059ec3d9 PH |
274 | /* To complete the envelope, write out the tree of non-recipients, followed by |
275 | the list of recipients. These won't be disjoint the first time, when no | |
276 | checking has been done. If a recipient is a "one-time" alias, it is followed by | |
277 | a space and its parent address number (pno). */ | |
278 | ||
8768d548 JH |
279 | tree_write(tree_nonrecipients, fp); |
280 | fprintf(fp, "%d\n", recipients_count); | |
d7978c0f | 281 | for (int i = 0; i < recipients_count; i++) |
059ec3d9 PH |
282 | { |
283 | recipient_item *r = recipients_list + i; | |
6e3b198d JH |
284 | |
285 | DEBUG(D_deliver) debug_printf("DSN: Flags :%d\n", r->dsn_flags); | |
286 | ||
50dc7409 | 287 | if (r->pno < 0 && r->errors_to == NULL && r->dsn_flags == 0) |
8768d548 | 288 | fprintf(fp, "%s\n", r->address); |
059ec3d9 PH |
289 | else |
290 | { | |
6e3b198d | 291 | uschar * errors_to = r->errors_to ? r->errors_to : US""; |
6c1c3d1d | 292 | /* for DSN SUPPORT extend exim 4 spool in a compatible way by |
6e3b198d JH |
293 | adding new values upfront and add flag 0x02 */ |
294 | uschar * orcpt = r->orcpt ? r->orcpt : US""; | |
295 | ||
8768d548 | 296 | fprintf(fp, "%s %s %d,%d %s %d,%d#3\n", r->address, orcpt, Ustrlen(orcpt), |
6e3b198d | 297 | r->dsn_flags, errors_to, Ustrlen(errors_to), r->pno); |
059ec3d9 | 298 | } |
94431adb | 299 | |
6e3b198d JH |
300 | DEBUG(D_deliver) debug_printf("DSN: **** SPOOL_OUT - " |
301 | "address: |%s| errorsto: |%s| orcpt: |%s| dsn_flags: %d\n", | |
302 | r->address, r->errors_to, r->orcpt, r->dsn_flags); | |
059ec3d9 PH |
303 | } |
304 | ||
305 | /* Put a blank line before the headers */ | |
306 | ||
8768d548 | 307 | fprintf(fp, "\n"); |
059ec3d9 PH |
308 | |
309 | /* Save the size of the file so far so we can subtract it from the final length | |
310 | to get the actual size of the headers. */ | |
311 | ||
8768d548 | 312 | fflush(fp); |
6e3b198d | 313 | if (fstat(fd, &statbuf)) |
8768d548 | 314 | return spool_write_error(where, errmsg, US"fstat", tname, fp); |
059ec3d9 PH |
315 | size_correction = statbuf.st_size; |
316 | ||
317 | /* Finally, write out the message's headers. To make it easier to read them | |
318 | in again, precede each one with the count of its length. Make the count fixed | |
319 | length to aid human eyes when debugging and arrange for it not be included in | |
320 | the size. It is followed by a space for normal headers, a flagging letter for | |
321 | various other headers, or an asterisk for old headers that have been rewritten. | |
322 | These are saved as a record for debugging. Don't included them in the message's | |
323 | size. */ | |
324 | ||
d7978c0f | 325 | for (header_line * h = header_list; h; h = h->next) |
059ec3d9 | 326 | { |
8768d548 | 327 | fprintf(fp, "%03d%c %s", h->slen, h->type, h->text); |
059ec3d9 PH |
328 | size_correction += 5; |
329 | if (h->type == '*') size_correction += h->slen; | |
330 | } | |
331 | ||
332 | /* Flush and check for any errors while writing */ | |
333 | ||
8768d548 JH |
334 | if (fflush(fp) != 0 || ferror(fp)) |
335 | return spool_write_error(where, errmsg, US"write", tname, fp); | |
059ec3d9 PH |
336 | |
337 | /* Force the file's contents to be written to disk. Note that fflush() | |
338 | just pushes it out of C, and fclose() doesn't guarantee to do the write | |
339 | either. That's just the way Unix works... */ | |
340 | ||
8768d548 JH |
341 | if (EXIMfsync(fileno(fp)) < 0) |
342 | return spool_write_error(where, errmsg, US"sync", tname, fp); | |
059ec3d9 PH |
343 | |
344 | /* Get the size of the file, and close it. */ | |
345 | ||
d4ff61d1 | 346 | if (fstat(fd, &statbuf) != 0) |
41313d92 | 347 | return spool_write_error(where, errmsg, US"fstat", tname, NULL); |
8768d548 | 348 | if (fclose(fp) != 0) |
41313d92 | 349 | return spool_write_error(where, errmsg, US"close", tname, NULL); |
059ec3d9 PH |
350 | |
351 | /* Rename the file to its correct name, thereby replacing any previous | |
352 | incarnation. */ | |
353 | ||
41313d92 JH |
354 | fname = spool_fname(US"input", message_subdir, id, US"-H"); |
355 | DEBUG(D_receive|D_deliver) debug_printf("Renaming spool header file: %s\n", fname); | |
059ec3d9 | 356 | |
41313d92 JH |
357 | if (Urename(tname, fname) < 0) |
358 | return spool_write_error(where, errmsg, US"rename", tname, NULL); | |
059ec3d9 PH |
359 | |
360 | /* Linux (and maybe other OS?) does not automatically sync a directory after | |
361 | an operation like rename. We therefore have to do it forcibly ourselves in | |
362 | these cases, to make sure the file is actually accessible on disk, as opposed | |
363 | to just the data being accessible from a file in lost+found. Linux also has | |
364 | O_DIRECTORY, for opening a directory. | |
365 | ||
366 | However, it turns out that some file systems (some versions of NFS?) do not | |
367 | support directory syncing. It seems safe enough to ignore EINVAL to cope with | |
368 | these cases. One hack on top of another... but that's life. */ | |
369 | ||
370 | #ifdef NEED_SYNC_DIRECTORY | |
371 | ||
41313d92 | 372 | tname = spool_fname(US"input", message_subdir, US".", US""); |
059ec3d9 | 373 | |
41313d92 JH |
374 | # ifndef O_DIRECTORY |
375 | # define O_DIRECTORY 0 | |
376 | # endif | |
059ec3d9 | 377 | |
41313d92 JH |
378 | if ((fd = Uopen(tname, O_RDONLY|O_DIRECTORY, 0)) < 0) |
379 | return spool_write_error(where, errmsg, US"directory open", fname, NULL); | |
059ec3d9 | 380 | |
54fc8428 | 381 | if (EXIMfsync(fd) < 0 && errno != EINVAL) |
41313d92 | 382 | return spool_write_error(where, errmsg, US"directory sync", fname, NULL); |
059ec3d9 PH |
383 | |
384 | if (close(fd) < 0) | |
41313d92 | 385 | return spool_write_error(where, errmsg, US"directory close", fname, NULL); |
059ec3d9 PH |
386 | |
387 | #endif /* NEED_SYNC_DIRECTORY */ | |
388 | ||
389 | /* Return the number of characters in the headers, which is the file size, less | |
4c04137d | 390 | the preliminary stuff, less the additional count fields on the headers. */ |
059ec3d9 PH |
391 | |
392 | DEBUG(D_receive) debug_printf("Size of headers = %d\n", | |
393 | (int)(statbuf.st_size - size_correction)); | |
394 | ||
395 | return statbuf.st_size - size_correction; | |
396 | } | |
397 | ||
398 | ||
399 | #ifdef SUPPORT_MOVE_FROZEN_MESSAGES | |
400 | ||
401 | /************************************************ | |
402 | * Make a hard link * | |
403 | ************************************************/ | |
404 | ||
405 | /* Used by spool_move_message() below. Note re the use of sprintf(): the value | |
406 | of spool_directory is checked to ensure that it is less than 200 characters at | |
407 | start-up time. | |
408 | ||
409 | Arguments: | |
410 | dir base directory name | |
411 | subdir subdirectory name | |
412 | id message id | |
413 | suffix suffix to add to id | |
414 | from source directory prefix | |
415 | to destination directory prefix | |
416 | noentok if TRUE, absence of file is not an error | |
417 | ||
418 | Returns: TRUE if all went well | |
419 | FALSE, having panic logged if not | |
420 | */ | |
421 | ||
422 | static BOOL | |
423 | make_link(uschar *dir, uschar *subdir, uschar *id, uschar *suffix, uschar *from, | |
424 | uschar *to, BOOL noentok) | |
425 | { | |
41313d92 JH |
426 | uschar * fname = spool_fname(string_sprintf("%s%s", from, dir), subdir, id, suffix); |
427 | uschar * tname = spool_fname(string_sprintf("%s%s", to, dir), subdir, id, suffix); | |
428 | if (Ulink(fname, tname) < 0 && (!noentok || errno != ENOENT)) | |
059ec3d9 PH |
429 | { |
430 | log_write(0, LOG_MAIN|LOG_PANIC, "link(\"%s\", \"%s\") failed while moving " | |
41313d92 | 431 | "message: %s", fname, tname, strerror(errno)); |
059ec3d9 PH |
432 | return FALSE; |
433 | } | |
434 | return TRUE; | |
435 | } | |
436 | ||
437 | ||
438 | ||
439 | /************************************************ | |
440 | * Break a link * | |
441 | ************************************************/ | |
442 | ||
443 | /* Used by spool_move_message() below. Note re the use of sprintf(): the value | |
444 | of spool_directory is checked to ensure that it is less than 200 characters at | |
445 | start-up time. | |
446 | ||
447 | Arguments: | |
448 | dir base directory name | |
449 | subdir subdirectory name | |
450 | id message id | |
451 | suffix suffix to add to id | |
452 | from source directory prefix | |
453 | noentok if TRUE, absence of file is not an error | |
454 | ||
455 | Returns: TRUE if all went well | |
456 | FALSE, having panic logged if not | |
457 | */ | |
458 | ||
459 | static BOOL | |
460 | break_link(uschar *dir, uschar *subdir, uschar *id, uschar *suffix, uschar *from, | |
461 | BOOL noentok) | |
462 | { | |
41313d92 JH |
463 | uschar * fname = spool_fname(string_sprintf("%s%s", from, dir), subdir, id, suffix); |
464 | if (Uunlink(fname) < 0 && (!noentok || errno != ENOENT)) | |
059ec3d9 PH |
465 | { |
466 | log_write(0, LOG_MAIN|LOG_PANIC, "unlink(\"%s\") failed while moving " | |
41313d92 | 467 | "message: %s", fname, strerror(errno)); |
059ec3d9 PH |
468 | return FALSE; |
469 | } | |
470 | return TRUE; | |
471 | } | |
472 | ||
473 | ||
474 | ||
475 | /************************************************ | |
476 | * Move message files * | |
477 | ************************************************/ | |
478 | ||
479 | /* Move the files for a message (-H, -D, and msglog) from one directory (or | |
480 | hierarchy) to another. It is assume that there is no -J file in existence when | |
481 | this is done. At present, this is used only when move_frozen_messages is set, | |
482 | so compile it only when that support is configured. | |
483 | ||
484 | Arguments: | |
485 | id the id of the message to be delivered | |
486 | subdir the subdirectory name, or an empty string | |
487 | from a prefix for "input" or "msglog" for where the message is now | |
488 | to a prefix for "input" or "msglog" for where the message is to go | |
489 | ||
490 | Returns: TRUE if all is well | |
491 | FALSE if not, with error logged in panic and main logs | |
492 | */ | |
493 | ||
494 | BOOL | |
495 | spool_move_message(uschar *id, uschar *subdir, uschar *from, uschar *to) | |
496 | { | |
497 | /* Create any output directories that do not exist. */ | |
498 | ||
41313d92 JH |
499 | (void) directory_make(spool_directory, |
500 | spool_sname(string_sprintf("%sinput", to), subdir), | |
501 | INPUT_DIRECTORY_MODE, TRUE); | |
502 | (void) directory_make(spool_directory, | |
503 | spool_sname(string_sprintf("%smsglog", to), subdir), | |
504 | INPUT_DIRECTORY_MODE, TRUE); | |
059ec3d9 PH |
505 | |
506 | /* Move the message by first creating new hard links for all the files, and | |
507 | then removing the old links. When moving messages onto the main spool, the -H | |
508 | file should be set up last, because that's the one that tells Exim there is a | |
509 | message to be delivered, so we create its new link last and remove its old link | |
510 | first. Programs that look at the alternate directories should follow the same | |
85ffcba6 | 511 | rule of waiting for a -H file before doing anything. When moving messages off |
059ec3d9 PH |
512 | the mail spool, the -D file should be open and locked at the time, thus keeping |
513 | Exim's hands off. */ | |
514 | ||
515 | if (!make_link(US"msglog", subdir, id, US"", from, to, TRUE) || | |
516 | !make_link(US"input", subdir, id, US"-D", from, to, FALSE) || | |
517 | !make_link(US"input", subdir, id, US"-H", from, to, FALSE)) | |
518 | return FALSE; | |
519 | ||
520 | if (!break_link(US"input", subdir, id, US"-H", from, FALSE) || | |
521 | !break_link(US"input", subdir, id, US"-D", from, FALSE) || | |
522 | !break_link(US"msglog", subdir, id, US"", from, TRUE)) | |
523 | return FALSE; | |
524 | ||
525 | log_write(0, LOG_MAIN, "moved from %sinput, %smsglog to %sinput, %smsglog", | |
526 | from, from, to, to); | |
527 | ||
528 | return TRUE; | |
529 | } | |
530 | ||
531 | #endif | |
532 | ||
533 | /* End of spool_out.c */ | |
3c8b3577 JH |
534 | /* vi: aw ai sw=2 |
535 | */ |