Commit | Line | Data |
---|---|---|
1f922db1 | 1 | /* $Cambridge: exim/src/src/dbfn.c,v 1.3 2005/06/14 10:32:01 ph10 Exp $ */ |
059ec3d9 PH |
2 | |
3 | /************************************************* | |
4 | * Exim - an Internet mail transport agent * | |
5 | *************************************************/ | |
6 | ||
c988f1f4 | 7 | /* Copyright (c) University of Cambridge 1995 - 2005 */ |
059ec3d9 PH |
8 | /* See the file NOTICE for conditions of use and distribution. */ |
9 | ||
10 | ||
11 | #include "exim.h" | |
12 | ||
13 | ||
14 | /* Functions for accessing Exim's hints database, which consists of a number of | |
15 | different DBM files. This module does not contain code for reading DBM files | |
16 | for (e.g.) alias expansion. That is all contained within the general search | |
17 | functions. As Exim now has support for several DBM interfaces, all the relevant | |
18 | functions are called as macros. | |
19 | ||
20 | All the data in Exim's database is in the nature of *hints*. Therefore it | |
21 | doesn't matter if it gets destroyed by accident. These functions are not | |
22 | supposed to implement a "safe" database. | |
23 | ||
24 | Keys are passed in as C strings, and the terminating zero *is* used when | |
25 | building the dbm files. This just makes life easier when scanning the files | |
26 | sequentially. | |
27 | ||
28 | Synchronization is required on the database files, and this is achieved by | |
29 | means of locking on independent lock files. (Earlier attempts to lock on the | |
30 | DBM files themselves were never completely successful.) Since callers may in | |
31 | general want to do more than one read or write while holding the lock, there | |
32 | are separate open and close functions. However, the calling modules should | |
33 | arrange to hold the locks for the bare minimum of time. */ | |
34 | ||
35 | ||
36 | ||
37 | /************************************************* | |
38 | * Berkeley DB error callback * | |
39 | *************************************************/ | |
40 | ||
41 | /* For Berkeley DB >= 2, we can define a function to be called in case of DB | |
42 | errors. This should help with debugging strange DB problems, e.g. getting "File | |
1f922db1 PH |
43 | exists" when you try to open a db file. The API for this function was changed |
44 | at DB release 4.3. */ | |
059ec3d9 PH |
45 | |
46 | #if defined(USE_DB) && defined(DB_VERSION_STRING) | |
47 | void | |
1f922db1 PH |
48 | #if DB_VERSION_MAJOR > 4 || (DB_VERSION_MAJOR == 4 && DB_VERSION_MINOR >= 3) |
49 | dbfn_bdb_error_callback(const DB_ENV *dbenv, const char *pfx, const char *msg) | |
50 | { | |
51 | dbenv = dbenv; | |
52 | #else | |
059ec3d9 PH |
53 | dbfn_bdb_error_callback(const char *pfx, char *msg) |
54 | { | |
1f922db1 | 55 | #endif |
059ec3d9 PH |
56 | pfx = pfx; |
57 | log_write(0, LOG_MAIN, "Berkeley DB error: %s", msg); | |
58 | } | |
59 | #endif | |
60 | ||
61 | ||
62 | ||
63 | ||
64 | /************************************************* | |
65 | * Open and lock a database file * | |
66 | *************************************************/ | |
67 | ||
68 | /* Used for accessing Exim's hints databases. | |
69 | ||
70 | Arguments: | |
71 | name The single-component name of one of Exim's database files. | |
72 | flags Either O_RDONLY or O_RDWR, indicating the type of open required; | |
73 | O_RDWR implies "create if necessary" | |
74 | dbblock Points to an open_db block to be filled in. | |
75 | lof If TRUE, write to the log for actual open failures (locking failures | |
76 | are always logged). | |
77 | ||
78 | Returns: NULL if the open failed, or the locking failed. After locking | |
79 | failures, errno is zero. | |
80 | ||
81 | On success, dbblock is returned. This contains the dbm pointer and | |
82 | the fd of the locked lock file. | |
83 | */ | |
84 | ||
85 | open_db * | |
86 | dbfn_open(uschar *name, int flags, open_db *dbblock, BOOL lof) | |
87 | { | |
88 | int rc, save_errno; | |
89 | BOOL read_only = flags == O_RDONLY; | |
90 | BOOL created = FALSE; | |
91 | flock_t lock_data; | |
92 | uschar buffer[256]; | |
93 | ||
94 | /* The first thing to do is to open a separate file on which to lock. This | |
95 | ensures that Exim has exclusive use of the database before it even tries to | |
96 | open it. Early versions tried to lock on the open database itself, but that | |
97 | gave rise to mysterious problems from time to time - it was suspected that some | |
98 | DB libraries "do things" on their open() calls which break the interlocking. | |
99 | The lock file is never written to, but we open it for writing so we can get a | |
100 | write lock if required. If it does not exist, we create it. This is done | |
101 | separately so we know when we have done it, because when running as root we | |
102 | need to change the ownership - see the bottom of this function. We also try to | |
103 | make the directory as well, just in case. We won't be doing this many times | |
104 | unnecessarily, because usually the lock file will be there. If the directory | |
105 | exists, there is no error. */ | |
106 | ||
107 | sprintf(CS buffer, "%s/db/%s.lockfile", spool_directory, name); | |
108 | ||
109 | if ((dbblock->lockfd = Uopen(buffer, O_RDWR, EXIMDB_LOCKFILE_MODE)) < 0) | |
110 | { | |
111 | created = TRUE; | |
112 | (void)directory_make(spool_directory, US"db", EXIMDB_DIRECTORY_MODE, TRUE); | |
113 | dbblock->lockfd = Uopen(buffer, O_RDWR|O_CREAT, EXIMDB_LOCKFILE_MODE); | |
114 | } | |
115 | ||
116 | if (dbblock->lockfd < 0) | |
117 | { | |
118 | log_write(0, LOG_MAIN, "%s", | |
119 | string_open_failed(errno, "database lock file %s", buffer)); | |
120 | errno = 0; /* Indicates locking failure */ | |
121 | return NULL; | |
122 | } | |
123 | ||
124 | /* Now we must get a lock on the opened lock file; do this with a blocking | |
125 | lock that times out. */ | |
126 | ||
127 | lock_data.l_type = read_only? F_RDLCK : F_WRLCK; | |
128 | lock_data.l_whence = lock_data.l_start = lock_data.l_len = 0; | |
129 | ||
130 | DEBUG(D_hints_lookup|D_retry|D_route|D_deliver) | |
131 | debug_printf("locking %s\n", buffer); | |
132 | ||
133 | sigalrm_seen = FALSE; | |
134 | alarm(EXIMDB_LOCK_TIMEOUT); | |
135 | rc = fcntl(dbblock->lockfd, F_SETLKW, &lock_data); | |
136 | alarm(0); | |
137 | ||
138 | if (sigalrm_seen) errno = ETIMEDOUT; | |
139 | if (rc < 0) | |
140 | { | |
141 | log_write(0, LOG_MAIN, "Failed to get %s lock for %s: %s", | |
142 | ((flags & O_RDONLY) != 0)? "read" : "write", buffer, | |
143 | (errno == ETIMEDOUT)? "timed out" : strerror(errno)); | |
144 | close(dbblock->lockfd); | |
145 | errno = 0; /* Indicates locking failure */ | |
146 | return NULL; | |
147 | } | |
148 | ||
149 | DEBUG(D_hints_lookup) debug_printf("locked %s\n", buffer); | |
150 | ||
151 | /* At this point we have an opened and locked separate lock file, that is, | |
152 | exclusive access to the database, so we can go ahead and open it. If we are | |
153 | expected to create it, don't do so at first, again so that we can detect | |
154 | whether we need to change its ownership (see comments about the lock file | |
155 | above.) */ | |
156 | ||
157 | sprintf(CS buffer, "%s/db/%s", spool_directory, name); | |
158 | EXIM_DBOPEN(buffer, flags, EXIMDB_MODE, &(dbblock->dbptr)); | |
159 | ||
160 | if (dbblock->dbptr == NULL && errno == ENOENT && flags == O_RDWR) | |
161 | { | |
162 | DEBUG(D_hints_lookup) | |
163 | debug_printf("%s appears not to exist: trying to create\n", buffer); | |
164 | created = TRUE; | |
165 | EXIM_DBOPEN(buffer, flags|O_CREAT, EXIMDB_MODE, &(dbblock->dbptr)); | |
166 | } | |
167 | ||
168 | save_errno = errno; | |
169 | ||
170 | /* If we are running as root and this is the first access to the database, its | |
171 | files will be owned by root. We want them to be owned by exim. We detect this | |
172 | situation by noting above when we had to create the lock file or the database | |
173 | itself. Because the different dbm libraries use different extensions for their | |
174 | files, I don't know of any easier way of arranging this than scanning the | |
175 | directory for files with the appropriate base name. At least this deals with | |
176 | the lock file at the same time. Also, the directory will typically have only | |
177 | half a dozen files, so the scan will be quick. | |
178 | ||
179 | This code is placed here, before the test for successful opening, because there | |
180 | was a case when a file was created, but the DBM library still returned NULL | |
181 | because of some problem. It also sorts out the lock file if that was created | |
182 | but creation of the database file failed. */ | |
183 | ||
184 | if (created && geteuid() == root_uid) | |
185 | { | |
186 | DIR *dd; | |
187 | struct dirent *ent; | |
188 | uschar *lastname = Ustrrchr(buffer, '/') + 1; | |
189 | int namelen = Ustrlen(name); | |
190 | ||
191 | *lastname = 0; | |
192 | dd = opendir(CS buffer); | |
193 | ||
194 | while ((ent = readdir(dd)) != NULL) | |
195 | { | |
196 | if (Ustrncmp(ent->d_name, name, namelen) == 0) | |
197 | { | |
198 | struct stat statbuf; | |
199 | Ustrcpy(lastname, ent->d_name); | |
200 | if (Ustat(buffer, &statbuf) >= 0 && statbuf.st_uid != exim_uid) | |
201 | { | |
202 | DEBUG(D_hints_lookup) debug_printf("ensuring %s is owned by exim\n", buffer); | |
203 | Uchown(buffer, exim_uid, exim_gid); | |
204 | } | |
205 | } | |
206 | } | |
207 | ||
208 | closedir(dd); | |
209 | } | |
210 | ||
211 | /* If the open has failed, return NULL, leaving errno set. If lof is TRUE, | |
212 | log the event - also for debugging - but not if the file just doesn't exist. */ | |
213 | ||
214 | if (dbblock->dbptr == NULL) | |
215 | { | |
216 | if (save_errno != ENOENT) | |
217 | { | |
218 | if (lof) | |
219 | log_write(0, LOG_MAIN, "%s", string_open_failed(save_errno, "DB file %s", | |
220 | buffer)); | |
221 | else | |
222 | DEBUG(D_hints_lookup) | |
223 | debug_printf("%s", CS string_open_failed(save_errno, "DB file %s\n", | |
224 | buffer)); | |
225 | } | |
226 | close(dbblock->lockfd); | |
227 | errno = save_errno; | |
228 | return NULL; | |
229 | } | |
230 | ||
231 | DEBUG(D_hints_lookup) | |
232 | debug_printf("opened hints database %s: flags=%x\n", buffer, flags); | |
233 | ||
234 | /* Pass back the block containing the opened database handle and the open fd | |
235 | for the lock. */ | |
236 | ||
237 | return dbblock; | |
238 | } | |
239 | ||
240 | ||
241 | ||
242 | ||
243 | /************************************************* | |
244 | * Unlock and close a database file * | |
245 | *************************************************/ | |
246 | ||
247 | /* Closing a file automatically unlocks it, so after closing the database, just | |
248 | close the lock file. | |
249 | ||
250 | Argument: a pointer to an open database block | |
251 | Returns: nothing | |
252 | */ | |
253 | ||
254 | void | |
255 | dbfn_close(open_db *dbblock) | |
256 | { | |
257 | EXIM_DBCLOSE(dbblock->dbptr); | |
258 | close(dbblock->lockfd); | |
259 | } | |
260 | ||
261 | ||
262 | ||
263 | ||
264 | /************************************************* | |
265 | * Read from database file * | |
266 | *************************************************/ | |
267 | ||
268 | /* Passing back the pointer unchanged is useless, because there is | |
269 | no guarantee of alignment. Since all the records used by Exim need | |
270 | to be properly aligned to pick out the timestamps, etc., we might as | |
271 | well do the copying centrally here. | |
272 | ||
273 | Most calls don't need the length, so there is a macro called dbfn_read which | |
274 | has two arguments; it calls this function adding NULL as the third. | |
275 | ||
276 | Arguments: | |
277 | dbblock a pointer to an open database block | |
278 | key the key of the record to be read | |
279 | length a pointer to an int into which to return the length, if not NULL | |
280 | ||
281 | Returns: a pointer to the retrieved record, or | |
282 | NULL if the record is not found | |
283 | */ | |
284 | ||
285 | void * | |
286 | dbfn_read_with_length(open_db *dbblock, uschar *key, int *length) | |
287 | { | |
288 | void *yield; | |
289 | EXIM_DATUM key_datum, result_datum; | |
290 | ||
291 | DEBUG(D_hints_lookup) debug_printf("dbfn_read: key=%s\n", key); | |
292 | ||
293 | EXIM_DATUM_INIT(key_datum); /* Some DBM libraries require the datum */ | |
294 | EXIM_DATUM_INIT(result_datum); /* to be cleared before use. */ | |
295 | EXIM_DATUM_DATA(key_datum) = CS key; | |
296 | EXIM_DATUM_SIZE(key_datum) = Ustrlen(key) + 1; | |
297 | ||
298 | if (!EXIM_DBGET(dbblock->dbptr, key_datum, result_datum)) return NULL; | |
299 | ||
300 | yield = store_get(EXIM_DATUM_SIZE(result_datum)); | |
301 | memcpy(yield, EXIM_DATUM_DATA(result_datum), EXIM_DATUM_SIZE(result_datum)); | |
302 | if (length != NULL) *length = EXIM_DATUM_SIZE(result_datum); | |
303 | ||
304 | EXIM_DATUM_FREE(result_datum); /* Some DBM libs require freeing */ | |
305 | return yield; | |
306 | } | |
307 | ||
308 | ||
309 | ||
310 | /************************************************* | |
311 | * Write to database file * | |
312 | *************************************************/ | |
313 | ||
314 | /* | |
315 | Arguments: | |
316 | dbblock a pointer to an open database block | |
317 | key the key of the record to be written | |
318 | ptr a pointer to the record to be written | |
319 | length the length of the record to be written | |
320 | ||
321 | Returns: the yield of the underlying dbm or db "write" function. If this | |
322 | is dbm, the value is zero for OK. | |
323 | */ | |
324 | ||
325 | int | |
326 | dbfn_write(open_db *dbblock, uschar *key, void *ptr, int length) | |
327 | { | |
328 | EXIM_DATUM key_datum, value_datum; | |
329 | dbdata_generic *gptr = (dbdata_generic *)ptr; | |
330 | gptr->time_stamp = time(NULL); | |
331 | ||
332 | DEBUG(D_hints_lookup) debug_printf("dbfn_write: key=%s\n", key); | |
333 | ||
334 | EXIM_DATUM_INIT(key_datum); /* Some DBM libraries require the datum */ | |
335 | EXIM_DATUM_INIT(value_datum); /* to be cleared before use. */ | |
336 | EXIM_DATUM_DATA(key_datum) = CS key; | |
337 | EXIM_DATUM_SIZE(key_datum) = Ustrlen(key) + 1; | |
338 | EXIM_DATUM_DATA(value_datum) = CS ptr; | |
339 | EXIM_DATUM_SIZE(value_datum) = length; | |
340 | return EXIM_DBPUT(dbblock->dbptr, key_datum, value_datum); | |
341 | } | |
342 | ||
343 | ||
344 | ||
345 | /************************************************* | |
346 | * Delete record from database file * | |
347 | *************************************************/ | |
348 | ||
349 | /* | |
350 | Arguments: | |
351 | dbblock a pointer to an open database block | |
352 | key the key of the record to be deleted | |
353 | ||
354 | Returns: the yield of the underlying dbm or db "delete" function. | |
355 | */ | |
356 | ||
357 | int | |
358 | dbfn_delete(open_db *dbblock, uschar *key) | |
359 | { | |
360 | EXIM_DATUM key_datum; | |
361 | EXIM_DATUM_INIT(key_datum); /* Some DBM libraries require clearing */ | |
362 | EXIM_DATUM_DATA(key_datum) = CS key; | |
363 | EXIM_DATUM_SIZE(key_datum) = Ustrlen(key) + 1; | |
364 | return EXIM_DBDEL(dbblock->dbptr, key_datum); | |
365 | } | |
366 | ||
367 | ||
368 | ||
369 | /************************************************* | |
370 | * Scan the keys of a database file * | |
371 | *************************************************/ | |
372 | ||
373 | /* | |
374 | Arguments: | |
375 | dbblock a pointer to an open database block | |
376 | start TRUE if starting a new scan | |
377 | FALSE if continuing with the current scan | |
378 | cursor a pointer to a pointer to a cursor anchor, for those dbm libraries | |
379 | that use the notion of a cursor | |
380 | ||
381 | Returns: the next record from the file, or | |
382 | NULL if there are no more | |
383 | */ | |
384 | ||
385 | uschar * | |
386 | dbfn_scan(open_db *dbblock, BOOL start, EXIM_CURSOR **cursor) | |
387 | { | |
388 | EXIM_DATUM key_datum, value_datum; | |
389 | uschar *yield; | |
390 | value_datum = value_datum; /* dummy; not all db libraries use this */ | |
391 | ||
392 | /* Some dbm require an initialization */ | |
393 | ||
394 | if (start) EXIM_DBCREATE_CURSOR(dbblock->dbptr, cursor); | |
395 | ||
396 | EXIM_DATUM_INIT(key_datum); /* Some DBM libraries require the datum */ | |
397 | EXIM_DATUM_INIT(value_datum); /* to be cleared before use. */ | |
398 | ||
399 | yield = (EXIM_DBSCAN(dbblock->dbptr, key_datum, value_datum, start, *cursor))? | |
400 | US EXIM_DATUM_DATA(key_datum) : NULL; | |
401 | ||
402 | /* Some dbm require a termination */ | |
403 | ||
404 | if (!yield) EXIM_DBDELETE_CURSOR(*cursor); | |
405 | return yield; | |
406 | } | |
407 | ||
408 | ||
409 | ||
410 | /************************************************* | |
411 | ************************************************** | |
412 | * Stand-alone test program * | |
413 | ************************************************** | |
414 | *************************************************/ | |
415 | ||
416 | #ifdef STAND_ALONE | |
417 | ||
418 | int | |
419 | main(int argc, char **cargv) | |
420 | { | |
421 | open_db dbblock[8]; | |
422 | int max_db = sizeof(dbblock)/sizeof(open_db); | |
423 | int current = -1; | |
424 | int showtime = 0; | |
425 | int i; | |
426 | dbdata_wait *dbwait = NULL; | |
427 | uschar **argv = USS cargv; | |
428 | uschar buffer[256]; | |
429 | uschar structbuffer[1024]; | |
430 | ||
431 | if (argc != 2) | |
432 | { | |
433 | printf("Usage: test_dbfn directory\n"); | |
434 | printf("The subdirectory called \"db\" in the given directory is used for\n"); | |
435 | printf("the files used in this test program.\n"); | |
436 | return 1; | |
437 | } | |
438 | ||
439 | /* Initialize */ | |
440 | ||
441 | spool_directory = argv[1]; | |
442 | debug_selector = D_all - D_memory; | |
443 | debug_file = stderr; | |
444 | big_buffer = malloc(big_buffer_size); | |
445 | ||
446 | for (i = 0; i < max_db; i++) dbblock[i].dbptr = NULL; | |
447 | ||
448 | printf("\nExim's db functions tester: interface type is %s\n", EXIM_DBTYPE); | |
449 | printf("DBM library: "); | |
450 | ||
451 | #ifdef DB_VERSION_STRING | |
452 | printf("Berkeley DB: %s\n", DB_VERSION_STRING); | |
453 | #elif defined(BTREEVERSION) && defined(HASHVERSION) | |
454 | #ifdef USE_DB | |
455 | printf("probably Berkeley DB version 1.8x (native mode)\n"); | |
456 | #else | |
457 | printf("probably Berkeley DB version 1.8x (compatibility mode)\n"); | |
458 | #endif | |
459 | #elif defined(_DBM_RDONLY) || defined(dbm_dirfno) | |
460 | printf("probably ndbm\n"); | |
461 | #elif defined(USE_TDB) | |
462 | printf("using tdb\n"); | |
463 | #else | |
464 | #ifdef USE_GDBM | |
465 | printf("probably GDBM (native mode)\n"); | |
466 | #else | |
467 | printf("probably GDBM (compatibility mode)\n"); | |
468 | #endif | |
469 | #endif | |
470 | ||
471 | /* Test the functions */ | |
472 | ||
473 | printf("\nTest the functions\n> "); | |
474 | ||
475 | while (Ufgets(buffer, 256, stdin) != NULL) | |
476 | { | |
477 | int len = Ustrlen(buffer); | |
478 | int count = 1; | |
479 | clock_t start = 1; | |
480 | clock_t stop = 0; | |
481 | uschar *cmd = buffer; | |
482 | while (len > 0 && isspace((uschar)buffer[len-1])) len--; | |
483 | buffer[len] = 0; | |
484 | ||
485 | if (isdigit((uschar)*cmd)) | |
486 | { | |
487 | count = Uatoi(cmd); | |
488 | while (isdigit((uschar)*cmd)) cmd++; | |
489 | while (isspace((uschar)*cmd)) cmd++; | |
490 | } | |
491 | ||
492 | if (Ustrncmp(cmd, "open", 4) == 0) | |
493 | { | |
494 | int i; | |
495 | open_db *odb; | |
496 | uschar *s = cmd + 4; | |
497 | while (isspace((uschar)*s)) s++; | |
498 | ||
499 | for (i = 0; i < max_db; i++) | |
500 | if (dbblock[i].dbptr == NULL) break; | |
501 | ||
502 | if (i >= max_db) | |
503 | { | |
504 | printf("Too many open databases\n> "); | |
505 | continue; | |
506 | } | |
507 | ||
508 | start = clock(); | |
509 | odb = dbfn_open(s, O_RDWR, dbblock + i, TRUE); | |
510 | stop = clock(); | |
511 | ||
512 | if (odb != NULL) | |
513 | { | |
514 | current = i; | |
515 | printf("opened %d\n", current); | |
516 | } | |
517 | /* Other error cases will have written messages */ | |
518 | else if (errno == ENOENT) | |
519 | { | |
520 | printf("open failed: %s%s\n", strerror(errno), | |
521 | #ifdef USE_DB | |
522 | " (or other Berkeley DB error)" | |
523 | #else | |
524 | "" | |
525 | #endif | |
526 | ); | |
527 | } | |
528 | } | |
529 | ||
530 | else if (Ustrncmp(cmd, "write", 5) == 0) | |
531 | { | |
532 | int rc = 0; | |
533 | uschar *key = cmd + 5; | |
534 | uschar *data; | |
535 | ||
536 | if (current < 0) | |
537 | { | |
538 | printf("No current database\n"); | |
539 | continue; | |
540 | } | |
541 | ||
542 | while (isspace((uschar)*key)) key++; | |
543 | data = key; | |
544 | while (*data != 0 && !isspace((uschar)*data)) data++; | |
545 | *data++ = 0; | |
546 | while (isspace((uschar)*data)) data++; | |
547 | ||
548 | dbwait = (dbdata_wait *)(&structbuffer); | |
549 | Ustrcpy(dbwait->text, data); | |
550 | ||
551 | start = clock(); | |
552 | while (count-- > 0) | |
553 | rc = dbfn_write(dbblock + current, key, dbwait, | |
554 | Ustrlen(data) + sizeof(dbdata_wait)); | |
555 | stop = clock(); | |
556 | if (rc != 0) printf("Failed: %s\n", strerror(errno)); | |
557 | } | |
558 | ||
559 | else if (Ustrncmp(cmd, "read", 4) == 0) | |
560 | { | |
561 | uschar *key = cmd + 4; | |
562 | if (current < 0) | |
563 | { | |
564 | printf("No current database\n"); | |
565 | continue; | |
566 | } | |
567 | while (isspace((uschar)*key)) key++; | |
568 | start = clock(); | |
569 | while (count-- > 0) | |
570 | dbwait = (dbdata_wait *)dbfn_read_with_length(dbblock+ current, key, NULL); | |
571 | stop = clock(); | |
572 | printf("%s\n", (dbwait == NULL)? "<not found>" : CS dbwait->text); | |
573 | } | |
574 | ||
575 | else if (Ustrncmp(cmd, "delete", 6) == 0) | |
576 | { | |
577 | uschar *key = cmd + 6; | |
578 | if (current < 0) | |
579 | { | |
580 | printf("No current database\n"); | |
581 | continue; | |
582 | } | |
583 | while (isspace((uschar)*key)) key++; | |
584 | dbfn_delete(dbblock + current, key); | |
585 | } | |
586 | ||
587 | else if (Ustrncmp(cmd, "scan", 4) == 0) | |
588 | { | |
589 | EXIM_CURSOR *cursor; | |
590 | BOOL startflag = TRUE; | |
591 | uschar *key; | |
592 | uschar keybuffer[256]; | |
593 | if (current < 0) | |
594 | { | |
595 | printf("No current database\n"); | |
596 | continue; | |
597 | } | |
598 | start = clock(); | |
599 | while ((key = dbfn_scan(dbblock + current, startflag, &cursor)) != NULL) | |
600 | { | |
601 | startflag = FALSE; | |
602 | Ustrcpy(keybuffer, key); | |
603 | dbwait = (dbdata_wait *)dbfn_read_with_length(dbblock + current, | |
604 | keybuffer, NULL); | |
605 | printf("%s: %s\n", keybuffer, dbwait->text); | |
606 | } | |
607 | stop = clock(); | |
608 | printf("End of scan\n"); | |
609 | } | |
610 | ||
611 | else if (Ustrncmp(cmd, "close", 5) == 0) | |
612 | { | |
613 | uschar *s = cmd + 5; | |
614 | while (isspace((uschar)*s)) s++; | |
615 | i = Uatoi(s); | |
616 | if (i >= max_db || dbblock[i].dbptr == NULL) printf("Not open\n"); else | |
617 | { | |
618 | start = clock(); | |
619 | dbfn_close(dbblock + i); | |
620 | stop = clock(); | |
621 | dbblock[i].dbptr = NULL; | |
622 | if (i == current) current = -1; | |
623 | } | |
624 | } | |
625 | ||
626 | else if (Ustrncmp(cmd, "file", 4) == 0) | |
627 | { | |
628 | uschar *s = cmd + 4; | |
629 | while (isspace((uschar)*s)) s++; | |
630 | i = Uatoi(s); | |
631 | if (i >= max_db || dbblock[i].dbptr == NULL) printf("Not open\n"); | |
632 | else current = i; | |
633 | } | |
634 | ||
635 | else if (Ustrncmp(cmd, "time", 4) == 0) | |
636 | { | |
637 | showtime = ~showtime; | |
638 | printf("Timing %s\n", showtime? "on" : "off"); | |
639 | } | |
640 | ||
641 | else if (Ustrcmp(cmd, "q") == 0 || Ustrncmp(cmd, "quit", 4) == 0) break; | |
642 | ||
643 | else if (Ustrncmp(cmd, "help", 4) == 0) | |
644 | { | |
645 | printf("close [<number>] close file [<number>]\n"); | |
646 | printf("delete <key> remove record from current file\n"); | |
647 | printf("file <number> make file <number> current\n"); | |
648 | printf("open <name> open db file\n"); | |
649 | printf("q[uit] exit program\n"); | |
650 | printf("read <key> read record from current file\n"); | |
651 | printf("scan scan current file\n"); | |
652 | printf("time time display on/off\n"); | |
653 | printf("write <key> <rest-of-line> write record to current file\n"); | |
654 | } | |
655 | ||
656 | else printf("Eh?\n"); | |
657 | ||
658 | if (showtime && stop >= start) | |
659 | printf("start=%d stop=%d difference=%d\n", (int)start, (int)stop, | |
660 | (int)(stop - start)); | |
661 | ||
662 | printf("> "); | |
663 | } | |
664 | ||
665 | for (i = 0; i < max_db; i++) | |
666 | { | |
667 | if (dbblock[i].dbptr != NULL) | |
668 | { | |
669 | printf("\nClosing %d", i); | |
670 | dbfn_close(dbblock + i); | |
671 | } | |
672 | } | |
673 | ||
674 | printf("\n"); | |
675 | return 0; | |
676 | } | |
677 | ||
678 | #endif | |
679 | ||
680 | /* End of dbfn.c */ |