Commit | Line | Data |
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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 | ||
9 | #include "exim.h" | |
10 | ||
11 | ||
12 | /* Functions for accessing Exim's hints database, which consists of a number of | |
13 | different DBM files. This module does not contain code for reading DBM files | |
14 | for (e.g.) alias expansion. That is all contained within the general search | |
15 | functions. As Exim now has support for several DBM interfaces, all the relevant | |
16 | functions are called as macros. | |
17 | ||
18 | All the data in Exim's database is in the nature of *hints*. Therefore it | |
19 | doesn't matter if it gets destroyed by accident. These functions are not | |
20 | supposed to implement a "safe" database. | |
21 | ||
22 | Keys are passed in as C strings, and the terminating zero *is* used when | |
23 | building the dbm files. This just makes life easier when scanning the files | |
24 | sequentially. | |
25 | ||
26 | Synchronization is required on the database files, and this is achieved by | |
27 | means of locking on independent lock files. (Earlier attempts to lock on the | |
28 | DBM files themselves were never completely successful.) Since callers may in | |
29 | general want to do more than one read or write while holding the lock, there | |
30 | are separate open and close functions. However, the calling modules should | |
31 | arrange to hold the locks for the bare minimum of time. */ | |
32 | ||
33 | ||
34 | ||
35 | /************************************************* | |
36 | * Berkeley DB error callback * | |
37 | *************************************************/ | |
38 | ||
39 | /* For Berkeley DB >= 2, we can define a function to be called in case of DB | |
40 | errors. This should help with debugging strange DB problems, e.g. getting "File | |
1f922db1 PH |
41 | exists" when you try to open a db file. The API for this function was changed |
42 | at DB release 4.3. */ | |
059ec3d9 PH |
43 | |
44 | #if defined(USE_DB) && defined(DB_VERSION_STRING) | |
45 | void | |
1f922db1 PH |
46 | #if DB_VERSION_MAJOR > 4 || (DB_VERSION_MAJOR == 4 && DB_VERSION_MINOR >= 3) |
47 | dbfn_bdb_error_callback(const DB_ENV *dbenv, const char *pfx, const char *msg) | |
48 | { | |
49 | dbenv = dbenv; | |
50 | #else | |
059ec3d9 PH |
51 | dbfn_bdb_error_callback(const char *pfx, char *msg) |
52 | { | |
1f922db1 | 53 | #endif |
059ec3d9 PH |
54 | pfx = pfx; |
55 | log_write(0, LOG_MAIN, "Berkeley DB error: %s", msg); | |
56 | } | |
57 | #endif | |
58 | ||
59 | ||
60 | ||
61 | ||
62 | /************************************************* | |
63 | * Open and lock a database file * | |
64 | *************************************************/ | |
65 | ||
66 | /* Used for accessing Exim's hints databases. | |
67 | ||
68 | Arguments: | |
69 | name The single-component name of one of Exim's database files. | |
70 | flags Either O_RDONLY or O_RDWR, indicating the type of open required; | |
71 | O_RDWR implies "create if necessary" | |
72 | dbblock Points to an open_db block to be filled in. | |
73 | lof If TRUE, write to the log for actual open failures (locking failures | |
74 | are always logged). | |
75 | ||
76 | Returns: NULL if the open failed, or the locking failed. After locking | |
77 | failures, errno is zero. | |
78 | ||
79 | On success, dbblock is returned. This contains the dbm pointer and | |
80 | the fd of the locked lock file. | |
eff37e47 PH |
81 | |
82 | There are some calls that use O_RDWR|O_CREAT for the flags. Having discovered | |
83 | this in December 2005, I'm not sure if this is correct or not, but for the | |
84 | moment I haven't changed them. | |
059ec3d9 PH |
85 | */ |
86 | ||
87 | open_db * | |
88 | dbfn_open(uschar *name, int flags, open_db *dbblock, BOOL lof) | |
89 | { | |
90 | int rc, save_errno; | |
91 | BOOL read_only = flags == O_RDONLY; | |
92 | BOOL created = FALSE; | |
93 | flock_t lock_data; | |
cfb9cf20 | 94 | uschar dirname[256], filename[256]; |
059ec3d9 PH |
95 | |
96 | /* The first thing to do is to open a separate file on which to lock. This | |
97 | ensures that Exim has exclusive use of the database before it even tries to | |
98 | open it. Early versions tried to lock on the open database itself, but that | |
99 | gave rise to mysterious problems from time to time - it was suspected that some | |
100 | DB libraries "do things" on their open() calls which break the interlocking. | |
101 | The lock file is never written to, but we open it for writing so we can get a | |
102 | write lock if required. If it does not exist, we create it. This is done | |
103 | separately so we know when we have done it, because when running as root we | |
104 | need to change the ownership - see the bottom of this function. We also try to | |
105 | make the directory as well, just in case. We won't be doing this many times | |
106 | unnecessarily, because usually the lock file will be there. If the directory | |
107 | exists, there is no error. */ | |
108 | ||
cfb9cf20 JH |
109 | snprintf(CS dirname, sizeof(dirname), "%s/db", spool_directory); |
110 | snprintf(CS filename, sizeof(filename), "%s/%s.lockfile", dirname, name); | |
059ec3d9 | 111 | |
cfb9cf20 | 112 | if ((dbblock->lockfd = Uopen(filename, O_RDWR, EXIMDB_LOCKFILE_MODE)) < 0) |
059ec3d9 PH |
113 | { |
114 | created = TRUE; | |
115 | (void)directory_make(spool_directory, US"db", EXIMDB_DIRECTORY_MODE, TRUE); | |
cfb9cf20 | 116 | dbblock->lockfd = Uopen(filename, O_RDWR|O_CREAT, EXIMDB_LOCKFILE_MODE); |
059ec3d9 PH |
117 | } |
118 | ||
119 | if (dbblock->lockfd < 0) | |
120 | { | |
121 | log_write(0, LOG_MAIN, "%s", | |
cfb9cf20 | 122 | string_open_failed(errno, "database lock file %s", filename)); |
059ec3d9 PH |
123 | errno = 0; /* Indicates locking failure */ |
124 | return NULL; | |
125 | } | |
126 | ||
127 | /* Now we must get a lock on the opened lock file; do this with a blocking | |
128 | lock that times out. */ | |
129 | ||
130 | lock_data.l_type = read_only? F_RDLCK : F_WRLCK; | |
131 | lock_data.l_whence = lock_data.l_start = lock_data.l_len = 0; | |
132 | ||
133 | DEBUG(D_hints_lookup|D_retry|D_route|D_deliver) | |
cfb9cf20 | 134 | debug_printf("locking %s\n", filename); |
059ec3d9 PH |
135 | |
136 | sigalrm_seen = FALSE; | |
137 | alarm(EXIMDB_LOCK_TIMEOUT); | |
138 | rc = fcntl(dbblock->lockfd, F_SETLKW, &lock_data); | |
139 | alarm(0); | |
140 | ||
141 | if (sigalrm_seen) errno = ETIMEDOUT; | |
142 | if (rc < 0) | |
143 | { | |
8c07b69f | 144 | log_write(0, LOG_MAIN|LOG_PANIC, "Failed to get %s lock for %s: %s", |
cfb9cf20 | 145 | read_only ? "read" : "write", filename, |
7b4c8c1f | 146 | errno == ETIMEDOUT ? "timed out" : strerror(errno)); |
f1e894f3 | 147 | (void)close(dbblock->lockfd); |
059ec3d9 PH |
148 | errno = 0; /* Indicates locking failure */ |
149 | return NULL; | |
150 | } | |
151 | ||
cfb9cf20 | 152 | DEBUG(D_hints_lookup) debug_printf("locked %s\n", filename); |
059ec3d9 PH |
153 | |
154 | /* At this point we have an opened and locked separate lock file, that is, | |
155 | exclusive access to the database, so we can go ahead and open it. If we are | |
156 | expected to create it, don't do so at first, again so that we can detect | |
157 | whether we need to change its ownership (see comments about the lock file | |
8187c3f3 PH |
158 | above.) There have been regular reports of crashes while opening hints |
159 | databases - often this is caused by non-matching db.h and the library. To make | |
160 | it easy to pin this down, there are now debug statements on either side of the | |
161 | open call. */ | |
059ec3d9 | 162 | |
cfb9cf20 | 163 | snprintf(CS filename, sizeof(filename), "%s/%s", dirname, name); |
cfb9cf20 | 164 | EXIM_DBOPEN(filename, dirname, flags, EXIMDB_MODE, &(dbblock->dbptr)); |
059ec3d9 | 165 | |
7b4c8c1f | 166 | if (!dbblock->dbptr && errno == ENOENT && flags == O_RDWR) |
059ec3d9 PH |
167 | { |
168 | DEBUG(D_hints_lookup) | |
cfb9cf20 | 169 | debug_printf("%s appears not to exist: trying to create\n", filename); |
059ec3d9 | 170 | created = TRUE; |
cfb9cf20 | 171 | EXIM_DBOPEN(filename, dirname, flags|O_CREAT, EXIMDB_MODE, &(dbblock->dbptr)); |
059ec3d9 PH |
172 | } |
173 | ||
174 | save_errno = errno; | |
175 | ||
176 | /* If we are running as root and this is the first access to the database, its | |
177 | files will be owned by root. We want them to be owned by exim. We detect this | |
178 | situation by noting above when we had to create the lock file or the database | |
179 | itself. Because the different dbm libraries use different extensions for their | |
180 | files, I don't know of any easier way of arranging this than scanning the | |
181 | directory for files with the appropriate base name. At least this deals with | |
182 | the lock file at the same time. Also, the directory will typically have only | |
183 | half a dozen files, so the scan will be quick. | |
184 | ||
185 | This code is placed here, before the test for successful opening, because there | |
186 | was a case when a file was created, but the DBM library still returned NULL | |
187 | because of some problem. It also sorts out the lock file if that was created | |
188 | but creation of the database file failed. */ | |
189 | ||
190 | if (created && geteuid() == root_uid) | |
191 | { | |
192 | DIR *dd; | |
193 | struct dirent *ent; | |
cfb9cf20 | 194 | uschar *lastname = Ustrrchr(filename, '/') + 1; |
059ec3d9 PH |
195 | int namelen = Ustrlen(name); |
196 | ||
197 | *lastname = 0; | |
cfb9cf20 | 198 | dd = opendir(CS filename); |
059ec3d9 | 199 | |
7b4c8c1f | 200 | while ((ent = readdir(dd))) |
059ec3d9 PH |
201 | if (Ustrncmp(ent->d_name, name, namelen) == 0) |
202 | { | |
203 | struct stat statbuf; | |
204 | Ustrcpy(lastname, ent->d_name); | |
cfb9cf20 | 205 | if (Ustat(filename, &statbuf) >= 0 && statbuf.st_uid != exim_uid) |
059ec3d9 | 206 | { |
cfb9cf20 JH |
207 | DEBUG(D_hints_lookup) debug_printf("ensuring %s is owned by exim\n", filename); |
208 | if (Uchown(filename, exim_uid, exim_gid)) | |
209 | DEBUG(D_hints_lookup) debug_printf("failed setting %s to owned by exim\n", filename); | |
059ec3d9 PH |
210 | } |
211 | } | |
059ec3d9 PH |
212 | |
213 | closedir(dd); | |
214 | } | |
215 | ||
216 | /* If the open has failed, return NULL, leaving errno set. If lof is TRUE, | |
0a6c178c JH |
217 | log the event - also for debugging - but debug only if the file just doesn't |
218 | exist. */ | |
059ec3d9 | 219 | |
7b4c8c1f | 220 | if (!dbblock->dbptr) |
059ec3d9 | 221 | { |
0a6c178c JH |
222 | if (lof && save_errno != ENOENT) |
223 | log_write(0, LOG_MAIN, "%s", string_open_failed(save_errno, "DB file %s", | |
cfb9cf20 | 224 | filename)); |
0a6c178c JH |
225 | else |
226 | DEBUG(D_hints_lookup) | |
227 | debug_printf("%s\n", CS string_open_failed(save_errno, "DB file %s", | |
cfb9cf20 | 228 | filename)); |
f1e894f3 | 229 | (void)close(dbblock->lockfd); |
059ec3d9 PH |
230 | errno = save_errno; |
231 | return NULL; | |
232 | } | |
233 | ||
234 | DEBUG(D_hints_lookup) | |
cfb9cf20 | 235 | debug_printf("opened hints database %s: flags=%s\n", filename, |
7b4c8c1f JH |
236 | flags == O_RDONLY ? "O_RDONLY" |
237 | : flags == O_RDWR ? "O_RDWR" | |
238 | : flags == (O_RDWR|O_CREAT) ? "O_RDWR|O_CREAT" | |
239 | : "??"); | |
059ec3d9 PH |
240 | |
241 | /* Pass back the block containing the opened database handle and the open fd | |
242 | for the lock. */ | |
243 | ||
244 | return dbblock; | |
245 | } | |
246 | ||
247 | ||
248 | ||
249 | ||
250 | /************************************************* | |
251 | * Unlock and close a database file * | |
252 | *************************************************/ | |
253 | ||
254 | /* Closing a file automatically unlocks it, so after closing the database, just | |
255 | close the lock file. | |
256 | ||
257 | Argument: a pointer to an open database block | |
258 | Returns: nothing | |
259 | */ | |
260 | ||
261 | void | |
262 | dbfn_close(open_db *dbblock) | |
263 | { | |
264 | EXIM_DBCLOSE(dbblock->dbptr); | |
f1e894f3 | 265 | (void)close(dbblock->lockfd); |
7b4c8c1f | 266 | DEBUG(D_hints_lookup) debug_printf("closed hints database and lockfile\n"); |
059ec3d9 PH |
267 | } |
268 | ||
269 | ||
270 | ||
271 | ||
272 | /************************************************* | |
273 | * Read from database file * | |
274 | *************************************************/ | |
275 | ||
276 | /* Passing back the pointer unchanged is useless, because there is | |
277 | no guarantee of alignment. Since all the records used by Exim need | |
278 | to be properly aligned to pick out the timestamps, etc., we might as | |
279 | well do the copying centrally here. | |
280 | ||
281 | Most calls don't need the length, so there is a macro called dbfn_read which | |
282 | has two arguments; it calls this function adding NULL as the third. | |
283 | ||
284 | Arguments: | |
285 | dbblock a pointer to an open database block | |
286 | key the key of the record to be read | |
287 | length a pointer to an int into which to return the length, if not NULL | |
288 | ||
289 | Returns: a pointer to the retrieved record, or | |
290 | NULL if the record is not found | |
291 | */ | |
292 | ||
293 | void * | |
55414b25 | 294 | dbfn_read_with_length(open_db *dbblock, const uschar *key, int *length) |
059ec3d9 PH |
295 | { |
296 | void *yield; | |
297 | EXIM_DATUM key_datum, result_datum; | |
55414b25 JH |
298 | int klen = Ustrlen(key) + 1; |
299 | uschar * key_copy = store_get(klen); | |
300 | ||
301 | memcpy(key_copy, key, klen); | |
059ec3d9 PH |
302 | |
303 | DEBUG(D_hints_lookup) debug_printf("dbfn_read: key=%s\n", key); | |
304 | ||
305 | EXIM_DATUM_INIT(key_datum); /* Some DBM libraries require the datum */ | |
306 | EXIM_DATUM_INIT(result_datum); /* to be cleared before use. */ | |
55414b25 JH |
307 | EXIM_DATUM_DATA(key_datum) = CS key_copy; |
308 | EXIM_DATUM_SIZE(key_datum) = klen; | |
059ec3d9 PH |
309 | |
310 | if (!EXIM_DBGET(dbblock->dbptr, key_datum, result_datum)) return NULL; | |
311 | ||
312 | yield = store_get(EXIM_DATUM_SIZE(result_datum)); | |
313 | memcpy(yield, EXIM_DATUM_DATA(result_datum), EXIM_DATUM_SIZE(result_datum)); | |
314 | if (length != NULL) *length = EXIM_DATUM_SIZE(result_datum); | |
315 | ||
316 | EXIM_DATUM_FREE(result_datum); /* Some DBM libs require freeing */ | |
317 | return yield; | |
318 | } | |
319 | ||
320 | ||
321 | ||
322 | /************************************************* | |
323 | * Write to database file * | |
324 | *************************************************/ | |
325 | ||
326 | /* | |
327 | Arguments: | |
328 | dbblock a pointer to an open database block | |
329 | key the key of the record to be written | |
330 | ptr a pointer to the record to be written | |
331 | length the length of the record to be written | |
332 | ||
333 | Returns: the yield of the underlying dbm or db "write" function. If this | |
334 | is dbm, the value is zero for OK. | |
335 | */ | |
336 | ||
337 | int | |
55414b25 | 338 | dbfn_write(open_db *dbblock, const uschar *key, void *ptr, int length) |
059ec3d9 PH |
339 | { |
340 | EXIM_DATUM key_datum, value_datum; | |
341 | dbdata_generic *gptr = (dbdata_generic *)ptr; | |
55414b25 JH |
342 | int klen = Ustrlen(key) + 1; |
343 | uschar * key_copy = store_get(klen); | |
344 | ||
345 | memcpy(key_copy, key, klen); | |
059ec3d9 PH |
346 | gptr->time_stamp = time(NULL); |
347 | ||
348 | DEBUG(D_hints_lookup) debug_printf("dbfn_write: key=%s\n", key); | |
349 | ||
350 | EXIM_DATUM_INIT(key_datum); /* Some DBM libraries require the datum */ | |
351 | EXIM_DATUM_INIT(value_datum); /* to be cleared before use. */ | |
55414b25 JH |
352 | EXIM_DATUM_DATA(key_datum) = CS key_copy; |
353 | EXIM_DATUM_SIZE(key_datum) = klen; | |
059ec3d9 PH |
354 | EXIM_DATUM_DATA(value_datum) = CS ptr; |
355 | EXIM_DATUM_SIZE(value_datum) = length; | |
356 | return EXIM_DBPUT(dbblock->dbptr, key_datum, value_datum); | |
357 | } | |
358 | ||
359 | ||
360 | ||
361 | /************************************************* | |
362 | * Delete record from database file * | |
363 | *************************************************/ | |
364 | ||
365 | /* | |
366 | Arguments: | |
367 | dbblock a pointer to an open database block | |
368 | key the key of the record to be deleted | |
369 | ||
370 | Returns: the yield of the underlying dbm or db "delete" function. | |
371 | */ | |
372 | ||
373 | int | |
55414b25 | 374 | dbfn_delete(open_db *dbblock, const uschar *key) |
059ec3d9 | 375 | { |
55414b25 JH |
376 | int klen = Ustrlen(key) + 1; |
377 | uschar * key_copy = store_get(klen); | |
378 | ||
379 | memcpy(key_copy, key, klen); | |
059ec3d9 PH |
380 | EXIM_DATUM key_datum; |
381 | EXIM_DATUM_INIT(key_datum); /* Some DBM libraries require clearing */ | |
55414b25 JH |
382 | EXIM_DATUM_DATA(key_datum) = CS key_copy; |
383 | EXIM_DATUM_SIZE(key_datum) = klen; | |
059ec3d9 PH |
384 | return EXIM_DBDEL(dbblock->dbptr, key_datum); |
385 | } | |
386 | ||
387 | ||
388 | ||
389 | /************************************************* | |
390 | * Scan the keys of a database file * | |
391 | *************************************************/ | |
392 | ||
393 | /* | |
394 | Arguments: | |
395 | dbblock a pointer to an open database block | |
396 | start TRUE if starting a new scan | |
397 | FALSE if continuing with the current scan | |
398 | cursor a pointer to a pointer to a cursor anchor, for those dbm libraries | |
399 | that use the notion of a cursor | |
400 | ||
401 | Returns: the next record from the file, or | |
402 | NULL if there are no more | |
403 | */ | |
404 | ||
405 | uschar * | |
406 | dbfn_scan(open_db *dbblock, BOOL start, EXIM_CURSOR **cursor) | |
407 | { | |
408 | EXIM_DATUM key_datum, value_datum; | |
409 | uschar *yield; | |
410 | value_datum = value_datum; /* dummy; not all db libraries use this */ | |
411 | ||
412 | /* Some dbm require an initialization */ | |
413 | ||
414 | if (start) EXIM_DBCREATE_CURSOR(dbblock->dbptr, cursor); | |
415 | ||
416 | EXIM_DATUM_INIT(key_datum); /* Some DBM libraries require the datum */ | |
417 | EXIM_DATUM_INIT(value_datum); /* to be cleared before use. */ | |
418 | ||
419 | yield = (EXIM_DBSCAN(dbblock->dbptr, key_datum, value_datum, start, *cursor))? | |
420 | US EXIM_DATUM_DATA(key_datum) : NULL; | |
421 | ||
422 | /* Some dbm require a termination */ | |
423 | ||
424 | if (!yield) EXIM_DBDELETE_CURSOR(*cursor); | |
425 | return yield; | |
426 | } | |
427 | ||
428 | ||
429 | ||
430 | /************************************************* | |
431 | ************************************************** | |
432 | * Stand-alone test program * | |
433 | ************************************************** | |
434 | *************************************************/ | |
435 | ||
436 | #ifdef STAND_ALONE | |
437 | ||
438 | int | |
439 | main(int argc, char **cargv) | |
440 | { | |
441 | open_db dbblock[8]; | |
442 | int max_db = sizeof(dbblock)/sizeof(open_db); | |
443 | int current = -1; | |
444 | int showtime = 0; | |
445 | int i; | |
446 | dbdata_wait *dbwait = NULL; | |
447 | uschar **argv = USS cargv; | |
448 | uschar buffer[256]; | |
449 | uschar structbuffer[1024]; | |
450 | ||
451 | if (argc != 2) | |
452 | { | |
453 | printf("Usage: test_dbfn directory\n"); | |
454 | printf("The subdirectory called \"db\" in the given directory is used for\n"); | |
455 | printf("the files used in this test program.\n"); | |
456 | return 1; | |
457 | } | |
458 | ||
459 | /* Initialize */ | |
460 | ||
461 | spool_directory = argv[1]; | |
462 | debug_selector = D_all - D_memory; | |
463 | debug_file = stderr; | |
464 | big_buffer = malloc(big_buffer_size); | |
465 | ||
466 | for (i = 0; i < max_db; i++) dbblock[i].dbptr = NULL; | |
467 | ||
468 | printf("\nExim's db functions tester: interface type is %s\n", EXIM_DBTYPE); | |
469 | printf("DBM library: "); | |
470 | ||
471 | #ifdef DB_VERSION_STRING | |
472 | printf("Berkeley DB: %s\n", DB_VERSION_STRING); | |
473 | #elif defined(BTREEVERSION) && defined(HASHVERSION) | |
474 | #ifdef USE_DB | |
475 | printf("probably Berkeley DB version 1.8x (native mode)\n"); | |
476 | #else | |
477 | printf("probably Berkeley DB version 1.8x (compatibility mode)\n"); | |
478 | #endif | |
479 | #elif defined(_DBM_RDONLY) || defined(dbm_dirfno) | |
480 | printf("probably ndbm\n"); | |
481 | #elif defined(USE_TDB) | |
482 | printf("using tdb\n"); | |
483 | #else | |
484 | #ifdef USE_GDBM | |
485 | printf("probably GDBM (native mode)\n"); | |
486 | #else | |
487 | printf("probably GDBM (compatibility mode)\n"); | |
488 | #endif | |
489 | #endif | |
490 | ||
491 | /* Test the functions */ | |
492 | ||
493 | printf("\nTest the functions\n> "); | |
494 | ||
495 | while (Ufgets(buffer, 256, stdin) != NULL) | |
496 | { | |
497 | int len = Ustrlen(buffer); | |
498 | int count = 1; | |
499 | clock_t start = 1; | |
500 | clock_t stop = 0; | |
501 | uschar *cmd = buffer; | |
502 | while (len > 0 && isspace((uschar)buffer[len-1])) len--; | |
503 | buffer[len] = 0; | |
504 | ||
505 | if (isdigit((uschar)*cmd)) | |
506 | { | |
507 | count = Uatoi(cmd); | |
508 | while (isdigit((uschar)*cmd)) cmd++; | |
509 | while (isspace((uschar)*cmd)) cmd++; | |
510 | } | |
511 | ||
512 | if (Ustrncmp(cmd, "open", 4) == 0) | |
513 | { | |
514 | int i; | |
515 | open_db *odb; | |
516 | uschar *s = cmd + 4; | |
517 | while (isspace((uschar)*s)) s++; | |
518 | ||
519 | for (i = 0; i < max_db; i++) | |
520 | if (dbblock[i].dbptr == NULL) break; | |
521 | ||
522 | if (i >= max_db) | |
523 | { | |
524 | printf("Too many open databases\n> "); | |
525 | continue; | |
526 | } | |
527 | ||
528 | start = clock(); | |
529 | odb = dbfn_open(s, O_RDWR, dbblock + i, TRUE); | |
530 | stop = clock(); | |
531 | ||
0a6c178c | 532 | if (odb) |
059ec3d9 PH |
533 | { |
534 | current = i; | |
535 | printf("opened %d\n", current); | |
536 | } | |
537 | /* Other error cases will have written messages */ | |
538 | else if (errno == ENOENT) | |
539 | { | |
540 | printf("open failed: %s%s\n", strerror(errno), | |
541 | #ifdef USE_DB | |
542 | " (or other Berkeley DB error)" | |
543 | #else | |
544 | "" | |
545 | #endif | |
546 | ); | |
547 | } | |
548 | } | |
549 | ||
550 | else if (Ustrncmp(cmd, "write", 5) == 0) | |
551 | { | |
552 | int rc = 0; | |
553 | uschar *key = cmd + 5; | |
554 | uschar *data; | |
555 | ||
556 | if (current < 0) | |
557 | { | |
558 | printf("No current database\n"); | |
559 | continue; | |
560 | } | |
561 | ||
562 | while (isspace((uschar)*key)) key++; | |
563 | data = key; | |
564 | while (*data != 0 && !isspace((uschar)*data)) data++; | |
565 | *data++ = 0; | |
566 | while (isspace((uschar)*data)) data++; | |
567 | ||
568 | dbwait = (dbdata_wait *)(&structbuffer); | |
569 | Ustrcpy(dbwait->text, data); | |
570 | ||
571 | start = clock(); | |
572 | while (count-- > 0) | |
573 | rc = dbfn_write(dbblock + current, key, dbwait, | |
574 | Ustrlen(data) + sizeof(dbdata_wait)); | |
575 | stop = clock(); | |
576 | if (rc != 0) printf("Failed: %s\n", strerror(errno)); | |
577 | } | |
578 | ||
579 | else if (Ustrncmp(cmd, "read", 4) == 0) | |
580 | { | |
581 | uschar *key = cmd + 4; | |
582 | if (current < 0) | |
583 | { | |
584 | printf("No current database\n"); | |
585 | continue; | |
586 | } | |
587 | while (isspace((uschar)*key)) key++; | |
588 | start = clock(); | |
589 | while (count-- > 0) | |
590 | dbwait = (dbdata_wait *)dbfn_read_with_length(dbblock+ current, key, NULL); | |
591 | stop = clock(); | |
592 | printf("%s\n", (dbwait == NULL)? "<not found>" : CS dbwait->text); | |
593 | } | |
594 | ||
595 | else if (Ustrncmp(cmd, "delete", 6) == 0) | |
596 | { | |
597 | uschar *key = cmd + 6; | |
598 | if (current < 0) | |
599 | { | |
600 | printf("No current database\n"); | |
601 | continue; | |
602 | } | |
603 | while (isspace((uschar)*key)) key++; | |
604 | dbfn_delete(dbblock + current, key); | |
605 | } | |
606 | ||
607 | else if (Ustrncmp(cmd, "scan", 4) == 0) | |
608 | { | |
609 | EXIM_CURSOR *cursor; | |
610 | BOOL startflag = TRUE; | |
611 | uschar *key; | |
612 | uschar keybuffer[256]; | |
613 | if (current < 0) | |
614 | { | |
615 | printf("No current database\n"); | |
616 | continue; | |
617 | } | |
618 | start = clock(); | |
619 | while ((key = dbfn_scan(dbblock + current, startflag, &cursor)) != NULL) | |
620 | { | |
621 | startflag = FALSE; | |
622 | Ustrcpy(keybuffer, key); | |
623 | dbwait = (dbdata_wait *)dbfn_read_with_length(dbblock + current, | |
624 | keybuffer, NULL); | |
625 | printf("%s: %s\n", keybuffer, dbwait->text); | |
626 | } | |
627 | stop = clock(); | |
628 | printf("End of scan\n"); | |
629 | } | |
630 | ||
631 | else if (Ustrncmp(cmd, "close", 5) == 0) | |
632 | { | |
633 | uschar *s = cmd + 5; | |
634 | while (isspace((uschar)*s)) s++; | |
635 | i = Uatoi(s); | |
636 | if (i >= max_db || dbblock[i].dbptr == NULL) printf("Not open\n"); else | |
637 | { | |
638 | start = clock(); | |
639 | dbfn_close(dbblock + i); | |
640 | stop = clock(); | |
641 | dbblock[i].dbptr = NULL; | |
642 | if (i == current) current = -1; | |
643 | } | |
644 | } | |
645 | ||
646 | else if (Ustrncmp(cmd, "file", 4) == 0) | |
647 | { | |
648 | uschar *s = cmd + 4; | |
649 | while (isspace((uschar)*s)) s++; | |
650 | i = Uatoi(s); | |
651 | if (i >= max_db || dbblock[i].dbptr == NULL) printf("Not open\n"); | |
652 | else current = i; | |
653 | } | |
654 | ||
655 | else if (Ustrncmp(cmd, "time", 4) == 0) | |
656 | { | |
657 | showtime = ~showtime; | |
658 | printf("Timing %s\n", showtime? "on" : "off"); | |
659 | } | |
660 | ||
661 | else if (Ustrcmp(cmd, "q") == 0 || Ustrncmp(cmd, "quit", 4) == 0) break; | |
662 | ||
663 | else if (Ustrncmp(cmd, "help", 4) == 0) | |
664 | { | |
665 | printf("close [<number>] close file [<number>]\n"); | |
666 | printf("delete <key> remove record from current file\n"); | |
667 | printf("file <number> make file <number> current\n"); | |
668 | printf("open <name> open db file\n"); | |
669 | printf("q[uit] exit program\n"); | |
670 | printf("read <key> read record from current file\n"); | |
671 | printf("scan scan current file\n"); | |
672 | printf("time time display on/off\n"); | |
673 | printf("write <key> <rest-of-line> write record to current file\n"); | |
674 | } | |
675 | ||
676 | else printf("Eh?\n"); | |
677 | ||
678 | if (showtime && stop >= start) | |
679 | printf("start=%d stop=%d difference=%d\n", (int)start, (int)stop, | |
680 | (int)(stop - start)); | |
681 | ||
682 | printf("> "); | |
683 | } | |
684 | ||
685 | for (i = 0; i < max_db; i++) | |
686 | { | |
687 | if (dbblock[i].dbptr != NULL) | |
688 | { | |
689 | printf("\nClosing %d", i); | |
690 | dbfn_close(dbblock + i); | |
691 | } | |
692 | } | |
693 | ||
694 | printf("\n"); | |
695 | return 0; | |
696 | } | |
697 | ||
698 | #endif | |
699 | ||
700 | /* End of dbfn.c */ |