tdb utility functions
Copyright (C) Andrew Tridgell 1992-1998
Copyright (C) Rafal Szczesniak 2002
-
+ Copyright (C) Michael Adam 2007
+
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
+ the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
-
+
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
-
+
You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "includes.h"
gotalarm = 1;
}
-/***************************************************************
- Make a TDB_DATA and keep the const warning in one place
-****************************************************************/
-
-TDB_DATA make_tdb_data(const uint8 *dptr, size_t dsize)
-{
- TDB_DATA ret;
- ret.dptr = CONST_DISCARD(uint8 *, dptr);
- ret.dsize = dsize;
- return ret;
-}
-
-TDB_DATA string_tdb_data(const char *string)
-{
- return make_tdb_data((const uint8 *)string, string ? strlen(string) : 0 );
-}
-
-TDB_DATA string_term_tdb_data(const char *string)
-{
- return make_tdb_data((const uint8 *)string, string ? strlen(string) + 1 : 0);
-}
-
/****************************************************************************
Lock a chain with timeout (in seconds).
****************************************************************************/
if (timeout) {
CatchSignal(SIGALRM, SIGNAL_CAST gotalarm_sig);
+ tdb_setalarm_sigptr(tdb, &gotalarm);
alarm(timeout);
}
if (timeout) {
alarm(0);
+ tdb_setalarm_sigptr(tdb, NULL);
CatchSignal(SIGALRM, SIGNAL_CAST SIG_IGN);
- if (gotalarm) {
+ if (gotalarm && (ret == -1)) {
DEBUG(0,("tdb_chainlock_with_timeout_internal: alarm (%u) timed out for key %s in tdb %s\n",
timeout, key.dptr, tdb_name(tdb)));
/* TODO: If we time out waiting for a lock, it might
return tdb_chainlock_with_timeout_internal(tdb, key, timeout, F_WRLCK);
}
-/****************************************************************************
- Lock a chain by string. Return -1 if timeout or lock failed.
-****************************************************************************/
-
-int tdb_lock_bystring(TDB_CONTEXT *tdb, const char *keyval)
-{
- TDB_DATA key = string_term_tdb_data(keyval);
-
- return tdb_chainlock(tdb, key);
-}
-
int tdb_lock_bystring_with_timeout(TDB_CONTEXT *tdb, const char *keyval,
int timeout)
{
TDB_DATA key = string_term_tdb_data(keyval);
-
- return tdb_chainlock_with_timeout(tdb, key, timeout);
-}
-
-/****************************************************************************
- Unlock a chain by string.
-****************************************************************************/
-
-void tdb_unlock_bystring(TDB_CONTEXT *tdb, const char *keyval)
-{
- TDB_DATA key = string_term_tdb_data(keyval);
- tdb_chainunlock(tdb, key);
+ return tdb_chainlock_with_timeout(tdb, key, timeout);
}
/****************************************************************************
int tdb_read_lock_bystring_with_timeout(TDB_CONTEXT *tdb, const char *keyval, unsigned int timeout)
{
TDB_DATA key = string_term_tdb_data(keyval);
-
- return tdb_chainlock_with_timeout_internal(tdb, key, timeout, F_RDLCK);
-}
-
-/****************************************************************************
- Read unlock a chain by string.
-****************************************************************************/
-
-void tdb_read_unlock_bystring(TDB_CONTEXT *tdb, const char *keyval)
-{
- TDB_DATA key = string_term_tdb_data(keyval);
-
- tdb_chainunlock_read(tdb, key);
-}
-
-
-/****************************************************************************
- Fetch a int32 value by a arbitrary blob key, return -1 if not found.
- Output is int32 in native byte order.
-****************************************************************************/
-
-int32 tdb_fetch_int32_byblob(TDB_CONTEXT *tdb, TDB_DATA key)
-{
- TDB_DATA data;
- int32 ret;
-
- data = tdb_fetch(tdb, key);
- if (!data.dptr || data.dsize != sizeof(int32)) {
- SAFE_FREE(data.dptr);
- return -1;
- }
-
- ret = IVAL(data.dptr,0);
- SAFE_FREE(data.dptr);
- return ret;
-}
-
-/****************************************************************************
- Fetch a int32 value by string key, return -1 if not found.
- Output is int32 in native byte order.
-****************************************************************************/
-
-int32 tdb_fetch_int32(TDB_CONTEXT *tdb, const char *keystr)
-{
- TDB_DATA key = string_term_tdb_data(keystr);
-
- return tdb_fetch_int32_byblob(tdb, key);
-}
-
-/****************************************************************************
- Store a int32 value by an arbitary blob key, return 0 on success, -1 on failure.
- Input is int32 in native byte order. Output in tdb is in little-endian.
-****************************************************************************/
-
-int tdb_store_int32_byblob(TDB_CONTEXT *tdb, TDB_DATA key, int32 v)
-{
- TDB_DATA data;
- int32 v_store;
-
- SIVAL(&v_store,0,v);
- data.dptr = (uint8 *)&v_store;
- data.dsize = sizeof(int32);
-
- return tdb_store(tdb, key, data, TDB_REPLACE);
-}
-
-/****************************************************************************
- Store a int32 value by string key, return 0 on success, -1 on failure.
- Input is int32 in native byte order. Output in tdb is in little-endian.
-****************************************************************************/
-
-int tdb_store_int32(TDB_CONTEXT *tdb, const char *keystr, int32 v)
-{
- TDB_DATA key = string_term_tdb_data(keystr);
-
- return tdb_store_int32_byblob(tdb, key, v);
-}
-
-/****************************************************************************
- Fetch a uint32 value by a arbitrary blob key, return -1 if not found.
- Output is uint32 in native byte order.
-****************************************************************************/
-
-BOOL tdb_fetch_uint32_byblob(TDB_CONTEXT *tdb, TDB_DATA key, uint32 *value)
-{
- TDB_DATA data;
-
- data = tdb_fetch(tdb, key);
- if (!data.dptr || data.dsize != sizeof(uint32)) {
- SAFE_FREE(data.dptr);
- return False;
- }
-
- *value = IVAL(data.dptr,0);
- SAFE_FREE(data.dptr);
- return True;
-}
-
-/****************************************************************************
- Fetch a uint32 value by string key, return -1 if not found.
- Output is uint32 in native byte order.
-****************************************************************************/
-
-BOOL tdb_fetch_uint32(TDB_CONTEXT *tdb, const char *keystr, uint32 *value)
-{
- TDB_DATA key = string_term_tdb_data(keystr);
-
- return tdb_fetch_uint32_byblob(tdb, key, value);
-}
-
-/****************************************************************************
- Store a uint32 value by an arbitary blob key, return 0 on success, -1 on failure.
- Input is uint32 in native byte order. Output in tdb is in little-endian.
-****************************************************************************/
-
-BOOL tdb_store_uint32_byblob(TDB_CONTEXT *tdb, TDB_DATA key, uint32 value)
-{
- TDB_DATA data;
- uint32 v_store;
- BOOL ret = True;
-
- SIVAL(&v_store, 0, value);
- data.dptr = (uint8 *)&v_store;
- data.dsize = sizeof(uint32);
- if (tdb_store(tdb, key, data, TDB_REPLACE) == -1)
- ret = False;
-
- return ret;
+ return tdb_chainlock_with_timeout_internal(tdb, key, timeout, F_RDLCK);
}
-/****************************************************************************
- Store a uint32 value by string key, return 0 on success, -1 on failure.
- Input is uint32 in native byte order. Output in tdb is in little-endian.
-****************************************************************************/
-
-BOOL tdb_store_uint32(TDB_CONTEXT *tdb, const char *keystr, uint32 value)
-{
- TDB_DATA key = string_term_tdb_data(keystr);
-
- return tdb_store_uint32_byblob(tdb, key, value);
-}
-/****************************************************************************
- Store a buffer by a null terminated string key. Return 0 on success, -1
- on failure.
-****************************************************************************/
-int tdb_store_bystring(TDB_CONTEXT *tdb, const char *keystr, TDB_DATA data, int flags)
-{
- TDB_DATA key = string_term_tdb_data(keystr);
- return tdb_store(tdb, key, data, flags);
-}
int tdb_trans_store_bystring(TDB_CONTEXT *tdb, const char *keystr,
TDB_DATA data, int flags)
{
TDB_DATA key = string_term_tdb_data(keystr);
-
- return tdb_trans_store(tdb, key, data, flags);
-}
-
-/****************************************************************************
- Fetch a buffer using a null terminated string key. Don't forget to call
- free() on the result dptr.
-****************************************************************************/
-
-TDB_DATA tdb_fetch_bystring(TDB_CONTEXT *tdb, const char *keystr)
-{
- TDB_DATA key = string_term_tdb_data(keystr);
-
- return tdb_fetch(tdb, key);
-}
-
-/****************************************************************************
- Delete an entry using a null terminated string key.
-****************************************************************************/
-
-int tdb_delete_bystring(TDB_CONTEXT *tdb, const char *keystr)
-{
- TDB_DATA key = string_term_tdb_data(keystr);
-
- return tdb_delete(tdb, key);
-}
-
-/****************************************************************************
- Atomic integer change. Returns old value. To create, set initial value in *oldval.
-****************************************************************************/
-
-int32 tdb_change_int32_atomic(TDB_CONTEXT *tdb, const char *keystr, int32 *oldval, int32 change_val)
-{
- int32 val;
- int32 ret = -1;
-
- if (tdb_lock_bystring(tdb, keystr) == -1)
- return -1;
-
- if ((val = tdb_fetch_int32(tdb, keystr)) == -1) {
- /* The lookup failed */
- if (tdb_error(tdb) != TDB_ERR_NOEXIST) {
- /* but not because it didn't exist */
- goto err_out;
- }
-
- /* Start with 'old' value */
- val = *oldval;
-
- } else {
- /* It worked, set return value (oldval) to tdb data */
- *oldval = val;
- }
-
- /* Increment value for storage and return next time */
- val += change_val;
-
- if (tdb_store_int32(tdb, keystr, val) == -1)
- goto err_out;
-
- ret = 0;
-
- err_out:
-
- tdb_unlock_bystring(tdb, keystr);
- return ret;
-}
-
-/****************************************************************************
- Atomic unsigned integer change. Returns old value. To create, set initial value in *oldval.
-****************************************************************************/
-
-BOOL tdb_change_uint32_atomic(TDB_CONTEXT *tdb, const char *keystr, uint32 *oldval, uint32 change_val)
-{
- uint32 val;
- BOOL ret = False;
-
- if (tdb_lock_bystring(tdb, keystr) == -1)
- return False;
- if (!tdb_fetch_uint32(tdb, keystr, &val)) {
- /* It failed */
- if (tdb_error(tdb) != TDB_ERR_NOEXIST) {
- /* and not because it didn't exist */
- goto err_out;
- }
-
- /* Start with 'old' value */
- val = *oldval;
-
- } else {
- /* it worked, set return value (oldval) to tdb data */
- *oldval = val;
-
- }
-
- /* get a new value to store */
- val += change_val;
-
- if (!tdb_store_uint32(tdb, keystr, val))
- goto err_out;
-
- ret = True;
-
- err_out:
-
- tdb_unlock_bystring(tdb, keystr);
- return ret;
+ return tdb_trans_store(tdb, key, data, flags);
}
/****************************************************************************
integers and strings.
****************************************************************************/
-size_t tdb_pack_va(uint8 *buf, int bufsize, const char *fmt, va_list ap)
+static size_t tdb_pack_va(uint8 *buf, int bufsize, const char *fmt, va_list ap)
{
uint8 bt;
uint16 w;
DEBUG(18,("tdb_pack_va(%s, %d) -> %d\n",
fmt0, bufsize0, (int)PTR_DIFF(buf, buf0)));
-
+
return PTR_DIFF(buf, buf0);
}
return result;
}
-BOOL tdb_pack_append(TALLOC_CTX *mem_ctx, uint8 **buf, size_t *len,
+bool tdb_pack_append(TALLOC_CTX *mem_ctx, uint8 **buf, size_t *len,
const char *fmt, ...)
{
va_list ap;
int len;
int *i;
void **p;
- char *s, **b;
+ char *s, **b, **ps;
char c;
const uint8 *buf0 = buf;
const char *fmt0 = fmt;
int bufsize0 = bufsize;
va_start(ap, fmt);
-
+
while (*fmt) {
switch ((c=*fmt++)) {
- case 'b':
+ case 'b': /* unsigned 8-bit integer */
len = 1;
bt = va_arg(ap, uint8 *);
if (bufsize < len)
goto no_space;
*bt = SVAL(buf, 0);
break;
- case 'w':
+ case 'w': /* unsigned 16-bit integer */
len = 2;
w = va_arg(ap, uint16 *);
if (bufsize < len)
goto no_space;
*w = SVAL(buf, 0);
break;
- case 'd':
+ case 'd': /* signed 32-bit integer (standard int in most systems) */
len = 4;
d = va_arg(ap, uint32 *);
if (bufsize < len)
goto no_space;
*d = IVAL(buf, 0);
break;
- case 'p':
+ case 'p': /* pointer */
len = 4;
p = va_arg(ap, void **);
if (bufsize < len)
goto no_space;
- /*
+ /*
* This isn't a real pointer - only a token (1 or 0)
* to mark the fact a pointer is present.
*/
*p = (void *)(IVAL(buf, 0) ? (void *)1 : NULL);
break;
- case 'P':
- s = va_arg(ap,char *);
+ case 'P': /* null-terminated string */
+ /* Return malloc'ed string. */
+ ps = va_arg(ap,char **);
len = strlen((const char *)buf) + 1;
- if (bufsize < len || len > sizeof(pstring))
- goto no_space;
- memcpy(s, buf, len);
+ *ps = SMB_STRDUP((const char *)buf);
break;
- case 'f':
+ case 'f': /* null-terminated string */
s = va_arg(ap,char *);
len = strlen((const char *)buf) + 1;
if (bufsize < len || len > sizeof(fstring))
goto no_space;
memcpy(s, buf, len);
break;
- case 'B':
+ case 'B': /* fixed-length string */
i = va_arg(ap, int *);
b = va_arg(ap, char **);
len = 4;
memcpy(*b, buf+4, *i);
break;
default:
- DEBUG(0,("Unknown tdb_unpack format %c in %s\n",
+ DEBUG(0,("Unknown tdb_unpack format %c in %s\n",
c, fmt));
len = 0;
va_end(ap);
- DEBUG(18,("tdb_unpack(%s, %d) -> %d\n",
+ DEBUG(18,("tdb_unpack(%s, %d) -> %d\n",
fmt0, bufsize0, (int)PTR_DIFF(buf, buf0)));
return PTR_DIFF(buf, buf0);
no_space:
+ va_end(ap);
return -1;
}
{
va_list ap;
char *ptr = NULL;
+ int ret;
va_start(ap, format);
- vasprintf(&ptr, format, ap);
+ ret = vasprintf(&ptr, format, ap);
va_end(ap);
-
- if (!ptr || !*ptr)
+
+ if ((ret == -1) || !*ptr)
return;
DEBUG((int)level, ("tdb(%s): %s", tdb_name(tdb) ? tdb_name(tdb) : "unnamed", ptr));
log_ctx.log_fn = tdb_log;
log_ctx.log_private = NULL;
+ if ((hash_size == 0) && (name != NULL)) {
+ const char *base = strrchr_m(name, '/');
+ if (base != NULL) {
+ base += 1;
+ }
+ else {
+ base = name;
+ }
+ hash_size = lp_parm_int(-1, "tdb_hashsize", base, 0);
+ }
+
tdb = tdb_open_ex(name, hash_size, tdb_flags,
open_flags, mode, &log_ctx, NULL);
if (!tdb)
return tdb;
}
-/****************************************************************************
- Allow tdb_delete to be used as a tdb_traversal_fn.
-****************************************************************************/
-
-int tdb_traverse_delete_fn(TDB_CONTEXT *the_tdb, TDB_DATA key, TDB_DATA dbuf,
- void *state)
-{
- return tdb_delete(the_tdb, key);
-}
-
-
-
-/**
- * Search across the whole tdb for keys that match the given pattern
- * return the result as a list of keys
- *
- * @param tdb pointer to opened tdb file context
- * @param pattern searching pattern used by fnmatch(3) functions
- *
- * @return list of keys found by looking up with given pattern
- **/
-TDB_LIST_NODE *tdb_search_keys(TDB_CONTEXT *tdb, const char* pattern)
-{
- TDB_DATA key, next;
- TDB_LIST_NODE *list = NULL;
- TDB_LIST_NODE *rec = NULL;
-
- for (key = tdb_firstkey(tdb); key.dptr; key = next) {
- /* duplicate key string to ensure null-termination */
- char *key_str = SMB_STRNDUP((const char *)key.dptr, key.dsize);
- if (!key_str) {
- DEBUG(0, ("tdb_search_keys: strndup() failed!\n"));
- smb_panic("strndup failed!\n");
- }
-
- DEBUG(18, ("checking %s for match to pattern %s\n", key_str, pattern));
-
- next = tdb_nextkey(tdb, key);
-
- /* do the pattern checking */
- if (fnmatch(pattern, key_str, 0) == 0) {
- rec = SMB_MALLOC_P(TDB_LIST_NODE);
- ZERO_STRUCTP(rec);
-
- rec->node_key = key;
-
- DLIST_ADD_END(list, rec, TDB_LIST_NODE *);
-
- DEBUG(18, ("checking %s matched pattern %s\n", key_str, pattern));
- } else {
- free(key.dptr);
- }
-
- /* free duplicated key string */
- free(key_str);
- }
-
- return list;
-
-}
-
-
-/**
- * Free the list returned by tdb_search_keys
- *
- * @param node list of results found by tdb_search_keys
- **/
-void tdb_search_list_free(TDB_LIST_NODE* node)
-{
- TDB_LIST_NODE *next_node;
-
- while (node) {
- next_node = node->next;
- SAFE_FREE(node->node_key.dptr);
- SAFE_FREE(node);
- node = next_node;
- };
-}
-
/****************************************************************************
tdb_store, wrapped in a transaction. This way we make sure that a process
that dies within writing does not leave a corrupt tdb behind.
va_list ap;
char *ptr = NULL;
int debuglevel = 0;
+ int ret;
- va_start(ap, format);
- vasprintf(&ptr, format, ap);
- va_end(ap);
-
switch (level) {
case TDB_DEBUG_FATAL:
- debug_level = 0;
+ debuglevel = 0;
break;
case TDB_DEBUG_ERROR:
debuglevel = 1;
debuglevel = 0;
}
- if (ptr != NULL) {
+ va_start(ap, format);
+ ret = vasprintf(&ptr, format, ap);
+ va_end(ap);
+
+ if (ret != -1) {
const char *name = tdb_name(tdb);
DEBUG(debuglevel, ("tdb(%s): %s", name ? name : "unnamed", ptr));
free(ptr);
return NULL;
}
+ if ((hash_size == 0) && (name != NULL)) {
+ const char *base = strrchr_m(name, '/');
+ if (base != NULL) {
+ base += 1;
+ }
+ else {
+ base = name;
+ }
+ hash_size = lp_parm_int(-1, "tdb_hashsize", base, 0);
+ }
+
w->tdb = tdb_open_ex(name, hash_size, tdb_flags,
open_flags, mode, &log_ctx, NULL);
if (w->tdb == NULL) {
return NT_STATUS_INTERNAL_ERROR;
}
+
+int tdb_data_cmp(TDB_DATA t1, TDB_DATA t2)
+{
+ int ret;
+ if (t1.dptr == NULL && t2.dptr != NULL) {
+ return -1;
+ }
+ if (t1.dptr != NULL && t2.dptr == NULL) {
+ return 1;
+ }
+ if (t1.dptr == t2.dptr) {
+ return t1.dsize - t2.dsize;
+ }
+ ret = memcmp(t1.dptr, t2.dptr, MIN(t1.dsize, t2.dsize));
+ if (ret == 0) {
+ return t1.dsize - t2.dsize;
+ }
+ return ret;
+}
git.samba.org / amitay / samba.git / blobdiff