2 Unix SMB/CIFS implementation.
4 Copyright (C) Andrew Tridgell 1992-1998
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
24 /* these are little tdb utility functions that are meant to make
25 dealing with a tdb database a little less cumbersome in Samba */
27 static SIG_ATOMIC_T gotalarm;
29 /***************************************************************
30 Signal function to tell us we timed out.
31 ****************************************************************/
33 static void gotalarm_sig(void)
38 /****************************************************************************
39 Lock a chain with timeout (in seconds).
40 ****************************************************************************/
42 static int tdb_chainlock_with_timeout( TDB_CONTEXT *tdb, TDB_DATA key, unsigned int timeout, int rw_type)
44 /* Allow tdb_chainlock to be interrupted by an alarm. */
47 tdb_set_lock_alarm(&gotalarm);
50 CatchSignal(SIGALRM, SIGNAL_CAST gotalarm_sig);
54 if (rw_type == F_RDLCK)
55 ret = tdb_chainlock_read(tdb, key);
57 ret = tdb_chainlock(tdb, key);
61 CatchSignal(SIGALRM, SIGNAL_CAST SIG_IGN);
63 DEBUG(0,("tdb_chainlock_with_timeout: alarm (%u) timed out for key %s in tdb %s\n",
64 timeout, key.dptr, tdb->name ));
72 /****************************************************************************
73 Lock a chain by string. Return -1 if timeout or lock failed.
74 ****************************************************************************/
76 int tdb_lock_bystring(TDB_CONTEXT *tdb, const char *keyval, unsigned int timeout)
81 key.dsize = strlen(keyval)+1;
83 return tdb_chainlock_with_timeout(tdb, key, timeout, F_WRLCK);
86 /****************************************************************************
87 Unlock a chain by string.
88 ****************************************************************************/
90 void tdb_unlock_bystring(TDB_CONTEXT *tdb, const char *keyval)
95 key.dsize = strlen(keyval)+1;
97 tdb_chainunlock(tdb, key);
100 /****************************************************************************
101 Read lock a chain by string. Return -1 if timeout or lock failed.
102 ****************************************************************************/
104 int tdb_read_lock_bystring(TDB_CONTEXT *tdb, const char *keyval, unsigned int timeout)
109 key.dsize = strlen(keyval)+1;
111 return tdb_chainlock_with_timeout(tdb, key, timeout, F_RDLCK);
114 /****************************************************************************
115 Read unlock a chain by string.
116 ****************************************************************************/
118 void tdb_read_unlock_bystring(TDB_CONTEXT *tdb, const char *keyval)
123 key.dsize = strlen(keyval)+1;
125 tdb_chainunlock_read(tdb, key);
129 /****************************************************************************
130 Fetch a int32 value by a arbitrary blob key, return -1 if not found.
131 Output is int32 in native byte order.
132 ****************************************************************************/
134 int32 tdb_fetch_int32_byblob(TDB_CONTEXT *tdb, const char *keyval, size_t len)
141 data = tdb_fetch(tdb, key);
142 if (!data.dptr || data.dsize != sizeof(int32)) {
143 SAFE_FREE(data.dptr);
147 ret = IVAL(data.dptr,0);
148 SAFE_FREE(data.dptr);
152 /****************************************************************************
153 Fetch a int32 value by string key, return -1 if not found.
154 Output is int32 in native byte order.
155 ****************************************************************************/
157 int32 tdb_fetch_int32(TDB_CONTEXT *tdb, const char *keystr)
159 return tdb_fetch_int32_byblob(tdb, keystr, strlen(keystr) + 1);
162 /****************************************************************************
163 Store a int32 value by an arbitary blob key, return 0 on success, -1 on failure.
164 Input is int32 in native byte order. Output in tdb is in little-endian.
165 ****************************************************************************/
167 int tdb_store_int32_byblob(TDB_CONTEXT *tdb, const char *keystr, size_t len, int32 v)
175 data.dptr = (void *)&v_store;
176 data.dsize = sizeof(int32);
178 return tdb_store(tdb, key, data, TDB_REPLACE);
181 /****************************************************************************
182 Store a int32 value by string key, return 0 on success, -1 on failure.
183 Input is int32 in native byte order. Output in tdb is in little-endian.
184 ****************************************************************************/
186 int tdb_store_int32(TDB_CONTEXT *tdb, const char *keystr, int32 v)
188 return tdb_store_int32_byblob(tdb, keystr, strlen(keystr) + 1, v);
191 /****************************************************************************
192 Fetch a uint32 value by a arbitrary blob key, return -1 if not found.
193 Output is uint32 in native byte order.
194 ****************************************************************************/
196 BOOL tdb_fetch_uint32_byblob(TDB_CONTEXT *tdb, const char *keyval, size_t len, uint32 *value)
202 data = tdb_fetch(tdb, key);
203 if (!data.dptr || data.dsize != sizeof(uint32)) {
204 SAFE_FREE(data.dptr);
208 *value = IVAL(data.dptr,0);
209 SAFE_FREE(data.dptr);
213 /****************************************************************************
214 Fetch a uint32 value by string key, return -1 if not found.
215 Output is uint32 in native byte order.
216 ****************************************************************************/
218 BOOL tdb_fetch_uint32(TDB_CONTEXT *tdb, const char *keystr, uint32 *value)
220 return tdb_fetch_uint32_byblob(tdb, keystr, strlen(keystr) + 1, value);
223 /****************************************************************************
224 Store a uint32 value by an arbitary blob key, return 0 on success, -1 on failure.
225 Input is uint32 in native byte order. Output in tdb is in little-endian.
226 ****************************************************************************/
228 BOOL tdb_store_uint32_byblob(TDB_CONTEXT *tdb, const char *keystr, size_t len, uint32 value)
236 SIVAL(&v_store, 0, value);
237 data.dptr = (void *)&v_store;
238 data.dsize = sizeof(uint32);
240 if (tdb_store(tdb, key, data, TDB_REPLACE) == -1)
246 /****************************************************************************
247 Store a uint32 value by string key, return 0 on success, -1 on failure.
248 Input is uint32 in native byte order. Output in tdb is in little-endian.
249 ****************************************************************************/
251 BOOL tdb_store_uint32(TDB_CONTEXT *tdb, const char *keystr, uint32 value)
253 return tdb_store_uint32_byblob(tdb, keystr, strlen(keystr) + 1, value);
255 /****************************************************************************
256 Store a buffer by a null terminated string key. Return 0 on success, -1
258 ****************************************************************************/
260 int tdb_store_by_string(TDB_CONTEXT *tdb, const char *keystr, TDB_DATA data, int flags)
265 key.dsize = strlen(keystr) + 1;
267 return tdb_store(tdb, key, data, flags);
270 /****************************************************************************
271 Fetch a buffer using a null terminated string key. Don't forget to call
272 free() on the result dptr.
273 ****************************************************************************/
275 TDB_DATA tdb_fetch_by_string(TDB_CONTEXT *tdb, const char *keystr)
280 key.dsize = strlen(keystr) + 1;
282 return tdb_fetch(tdb, key);
285 /****************************************************************************
286 Delete an entry using a null terminated string key.
287 ****************************************************************************/
289 int tdb_delete_by_string(TDB_CONTEXT *tdb, const char *keystr)
294 key.dsize = strlen(keystr) + 1;
296 return tdb_delete(tdb, key);
299 /****************************************************************************
300 Atomic integer change. Returns old value. To create, set initial value in *oldval.
301 ****************************************************************************/
303 int32 tdb_change_int32_atomic(TDB_CONTEXT *tdb, const char *keystr, int32 *oldval, int32 change_val)
308 if (tdb_lock_bystring(tdb, keystr,0) == -1)
311 if ((val = tdb_fetch_int32(tdb, keystr)) == -1) {
312 /* The lookup failed */
313 if (tdb_error(tdb) != TDB_ERR_NOEXIST) {
314 /* but not becouse it didn't exist */
318 /* Start with 'old' value */
322 /* It worked, set return value (oldval) to tdb data */
326 /* Increment value for storage and return next time */
329 if (tdb_store_int32(tdb, keystr, val) == -1)
336 tdb_unlock_bystring(tdb, keystr);
340 /****************************************************************************
341 Atomic unsigned integer change. Returns old value. To create, set initial value in *oldval.
342 ****************************************************************************/
344 BOOL tdb_change_uint32_atomic(TDB_CONTEXT *tdb, const char *keystr, uint32 *oldval, uint32 change_val)
349 if (tdb_lock_bystring(tdb, keystr,0) == -1)
352 if (!tdb_fetch_uint32(tdb, keystr, &val)) {
354 if (tdb_error(tdb) != TDB_ERR_NOEXIST) {
355 /* and not becouse it didn't exist */
359 /* Start with 'old' value */
363 /* it worked, set return value (oldval) to tdb data */
368 /* get a new value to store */
371 if (!tdb_store_uint32(tdb, keystr, val))
378 tdb_unlock_bystring(tdb, keystr);
382 /****************************************************************************
383 Useful pair of routines for packing/unpacking data consisting of
384 integers and strings.
385 ****************************************************************************/
387 size_t tdb_pack(char *buf, int bufsize, const char *fmt, ...)
398 const char *fmt0 = fmt;
399 int bufsize0 = bufsize;
404 switch ((c = *fmt++)) {
407 w = (uint16)va_arg(ap, int);
413 d = va_arg(ap, uint32);
419 p = va_arg(ap, void *);
425 s = va_arg(ap,char *);
432 s = va_arg(ap,char *);
440 s = va_arg(ap, char *);
442 if (bufsize >= len) {
448 DEBUG(0,("Unknown tdb_pack format %c in %s\n",
460 DEBUG(18,("tdb_pack(%s, %d) -> %d\n",
461 fmt0, bufsize0, (int)PTR_DIFF(buf, buf0)));
463 return PTR_DIFF(buf, buf0);
466 /****************************************************************************
467 Useful pair of routines for packing/unpacking data consisting of
468 integers and strings.
469 ****************************************************************************/
471 int tdb_unpack(char *buf, int bufsize, const char *fmt, ...)
482 const char *fmt0 = fmt;
483 int bufsize0 = bufsize;
488 switch ((c=*fmt++)) {
491 w = va_arg(ap, uint16 *);
498 d = va_arg(ap, uint32 *);
505 p = va_arg(ap, void **);
508 *p = (void *)IVAL(buf, 0);
511 s = va_arg(ap,char *);
512 len = strlen(buf) + 1;
513 if (bufsize < len || len > sizeof(pstring))
518 s = va_arg(ap,char *);
519 len = strlen(buf) + 1;
520 if (bufsize < len || len > sizeof(fstring))
525 i = va_arg(ap, int *);
526 b = va_arg(ap, char **);
538 *b = (char *)malloc(*i);
541 memcpy(*b, buf+4, *i);
544 DEBUG(0,("Unknown tdb_unpack format %c in %s\n",
557 DEBUG(18,("tdb_unpack(%s, %d) -> %d\n",
558 fmt0, bufsize0, (int)PTR_DIFF(buf, buf0)));
560 return PTR_DIFF(buf, buf0);
566 /****************************************************************************
567 Log tdb messages via DEBUG().
568 ****************************************************************************/
570 static void tdb_log(TDB_CONTEXT *tdb, int level, const char *format, ...)
575 va_start(ap, format);
576 vasprintf(&ptr, format, ap);
582 DEBUG(level, ("tdb(%s): %s", tdb->name ? tdb->name : "unnamed", ptr));
586 /****************************************************************************
587 Like tdb_open() but also setup a logging function that redirects to
588 the samba DEBUG() system.
589 ****************************************************************************/
591 TDB_CONTEXT *tdb_open_log(const char *name, int hash_size, int tdb_flags,
592 int open_flags, mode_t mode)
597 tdb_flags |= TDB_NOMMAP;
599 tdb = tdb_open_ex(name, hash_size, tdb_flags,
600 open_flags, mode, tdb_log);
608 /****************************************************************************
609 Allow tdb_delete to be used as a tdb_traversal_fn.
610 ****************************************************************************/
612 int tdb_traverse_delete_fn(TDB_CONTEXT *the_tdb, TDB_DATA key, TDB_DATA dbuf,
615 return tdb_delete(the_tdb, key);
621 * Search across the whole tdb for keys that match the given pattern
622 * return the result as a list of keys
624 * @param tdb pointer to opened tdb file context
625 * @param pattern searching pattern used by fnmatch(3) functions
627 * @return list of keys found by looking up with given pattern
629 TDB_LIST_NODE *tdb_search_keys(TDB_CONTEXT *tdb, const char* pattern)
632 TDB_LIST_NODE *list = NULL;
633 TDB_LIST_NODE *rec = NULL;
634 TDB_LIST_NODE *tmp = NULL;
636 for (key = tdb_firstkey(tdb); key.dptr; key = next) {
637 /* duplicate key string to ensure null-termination */
638 char *key_str = (char*) strndup(key.dptr, key.dsize);
640 DEBUG(0, ("tdb_search_keys: strndup() failed!\n"));
641 smb_panic("strndup failed!\n");
644 DEBUG(18, ("checking %s for match to pattern %s\n", key_str, pattern));
646 next = tdb_nextkey(tdb, key);
648 /* do the pattern checking */
649 if (fnmatch(pattern, key_str, 0) == 0) {
650 rec = (TDB_LIST_NODE*) malloc(sizeof(*rec));
655 DLIST_ADD_END(list, rec, tmp);
657 DEBUG(18, ("checking %s matched pattern %s\n", key_str, pattern));
662 /* free duplicated key string */
672 * Free the list returned by tdb_search_keys
674 * @param node list of results found by tdb_search_keys
676 void tdb_search_list_free(TDB_LIST_NODE* node)
678 TDB_LIST_NODE *next_node;
681 next_node = node->next;