#undef calloc
#undef strdup
-#ifdef BUILD_TDB2
-static struct flock flock_struct;
-
-/* Return a value which is none of v1, v2 or v3. */
-static inline short int invalid_value(short int v1, short int v2, short int v3)
-{
- short int try = (v1+v2+v3)^((v1+v2+v3) << 16);
- while (try == v1 || try == v2 || try == v3)
- try++;
- return try;
-}
-
-/* We invalidate in as many ways as we can, so the OS rejects it */
-static void invalidate_flock_struct(int signum)
-{
- flock_struct.l_type = invalid_value(F_RDLCK, F_WRLCK, F_UNLCK);
- flock_struct.l_whence = invalid_value(SEEK_SET, SEEK_CUR, SEEK_END);
- flock_struct.l_start = -1;
- /* A large negative. */
- flock_struct.l_len = (((off_t)1 << (sizeof(off_t)*CHAR_BIT - 1)) + 1);
-}
-
-static int timeout_lock(int fd, int rw, off_t off, off_t len, bool waitflag,
- void *_timeout)
-{
- int ret, saved_errno;
- unsigned int timeout = *(unsigned int *)_timeout;
-
- flock_struct.l_type = rw;
- flock_struct.l_whence = SEEK_SET;
- flock_struct.l_start = off;
- flock_struct.l_len = len;
-
- CatchSignal(SIGALRM, invalidate_flock_struct);
- alarm(timeout);
-
- for (;;) {
- if (waitflag)
- ret = fcntl(fd, F_SETLKW, &flock_struct);
- else
- ret = fcntl(fd, F_SETLK, &flock_struct);
-
- if (ret == 0)
- break;
-
- /* Not signalled? Something else went wrong. */
- if (flock_struct.l_len == len) {
- if (errno == EAGAIN || errno == EINTR)
- continue;
- saved_errno = errno;
- break;
- } else {
- saved_errno = EINTR;
- break;
- }
- }
-
- alarm(0);
- errno = saved_errno;
- return ret;
-}
-
-static int tdb_chainlock_with_timeout_internal(struct tdb_context *tdb,
- TDB_DATA key,
- unsigned int timeout,
- int rw_type)
-{
- union tdb_attribute locking;
- enum TDB_ERROR ecode;
-
- if (timeout) {
- locking.base.attr = TDB_ATTRIBUTE_FLOCK;
- ecode = tdb_get_attribute(tdb, &locking);
- if (ecode != TDB_SUCCESS)
- return ecode;
-
- /* Replace locking function with our own. */
- locking.flock.data = &timeout;
- locking.flock.lock = timeout_lock;
-
- ecode = tdb_set_attribute(tdb, &locking);
- if (ecode != TDB_SUCCESS)
- return ecode;
- }
- if (rw_type == F_RDLCK)
- ecode = tdb_chainlock_read(tdb, key);
- else
- ecode = tdb_chainlock(tdb, key);
-
- if (timeout) {
- tdb_unset_attribute(tdb, TDB_ATTRIBUTE_FLOCK);
- }
- return ecode == TDB_SUCCESS ? 0 : -1;
-}
-#else
/* these are little tdb utility functions that are meant to make
dealing with a tdb database a little less cumbersome in Samba */
-static SIG_ATOMIC_T gotalarm;
-
-/***************************************************************
- Signal function to tell us we timed out.
-****************************************************************/
-
-static void gotalarm_sig(int signum)
-{
- gotalarm = 1;
-}
-
-/****************************************************************************
- Lock a chain with timeout (in seconds).
-****************************************************************************/
-
-static int tdb_chainlock_with_timeout_internal( TDB_CONTEXT *tdb, TDB_DATA key, unsigned int timeout, int rw_type)
-{
- /* Allow tdb_chainlock to be interrupted by an alarm. */
- int ret;
- gotalarm = 0;
-
- if (timeout) {
- CatchSignal(SIGALRM, gotalarm_sig);
- tdb_setalarm_sigptr(tdb, &gotalarm);
- alarm(timeout);
- }
-
- if (rw_type == F_RDLCK)
- ret = tdb_chainlock_read(tdb, key);
- else
- ret = tdb_chainlock(tdb, key);
-
- if (timeout) {
- alarm(0);
- tdb_setalarm_sigptr(tdb, NULL);
- CatchSignal(SIGALRM, SIG_IGN);
- if (gotalarm && (ret != 0)) {
- 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
- * be nice to use F_GETLK to get the pid of the
- * process currently holding the lock and print that
- * as part of the debugging message. -- mbp */
- return -1;
- }
- }
-
- return ret == 0 ? 0 : -1;
-}
-#endif /* TDB1 */
-
-/****************************************************************************
- Write lock a chain. Return non-zero if timeout or lock failed.
-****************************************************************************/
-
-int tdb_chainlock_with_timeout( TDB_CONTEXT *tdb, TDB_DATA key, unsigned int timeout)
-{
- return tdb_chainlock_with_timeout_internal(tdb, key, timeout, F_WRLCK);
-}
-
-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);
-}
-
-/****************************************************************************
- Read lock a chain by string. Return non-zero if timeout or lock failed.
-****************************************************************************/
-
-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);
-}
-
-
-
-
int tdb_trans_store_bystring(TDB_CONTEXT *tdb, const char *keystr,
TDB_DATA data, int flags)
{
goto no_space;
*w = SVAL(buf, 0);
break;
- case 'd': /* signed 32-bit integer (standard int in most systems) */
+ case 'd': /* unsigned 32-bit integer (standard int in most systems) */
len = 4;
d = va_arg(ap, uint32 *);
if (bufsize < len)
case 'P': /* null-terminated string */
/* Return malloc'ed string. */
ps = va_arg(ap,char **);
- len = strlen((const char *)buf) + 1;
+ len = strnlen((const char *)buf, bufsize) + 1;
+ if (bufsize < len)
+ goto no_space;
*ps = SMB_STRDUP((const char *)buf);
break;
case 'f': /* null-terminated string */
s = va_arg(ap,char *);
- len = strlen((const char *)buf) + 1;
+ len = strnlen((const char *)buf, bufsize) + 1;
if (bufsize < len || len > sizeof(fstring))
goto no_space;
memcpy(s, buf, len);
Log tdb messages via DEBUG().
****************************************************************************/
-#ifdef BUILD_TDB2
-static void tdb_log(TDB_CONTEXT *tdb, enum tdb_log_level level,
- const char *message, void *unused)
-{
- DEBUG((int)level, ("tdb(%s): %s",
- tdb_name(tdb) ? tdb_name(tdb) : "unnamed", message));
-}
-#else
static void tdb_log(TDB_CONTEXT *tdb, enum tdb_debug_level level, const char *format, ...)
{
va_list ap;
DEBUG((int)level, ("tdb(%s): %s", tdb_name(tdb) ? tdb_name(tdb) : "unnamed", ptr));
SAFE_FREE(ptr);
}
-#endif /* TDB1 */
/****************************************************************************
Like tdb_open() but also setup a logging function that redirects to
return res;
}
-NTSTATUS map_nt_error_from_tdb(enum TDB_ERROR err)
-{
- NTSTATUS result = NT_STATUS_INTERNAL_ERROR;
-
- switch (err) {
- case TDB_SUCCESS:
- result = NT_STATUS_OK;
- break;
- case TDB_ERR_CORRUPT:
- result = NT_STATUS_INTERNAL_DB_CORRUPTION;
- break;
- case TDB_ERR_IO:
- result = NT_STATUS_UNEXPECTED_IO_ERROR;
- break;
- case TDB_ERR_OOM:
- result = NT_STATUS_NO_MEMORY;
- break;
- case TDB_ERR_EXISTS:
- result = NT_STATUS_OBJECT_NAME_COLLISION;
- break;
-
- case TDB_ERR_LOCK:
- /*
- * TDB_ERR_LOCK is very broad, we could for example
- * distinguish between fcntl locks and invalid lock
- * sequences. So NT_STATUS_FILE_LOCK_CONFLICT is a
- * compromise.
- */
- result = NT_STATUS_FILE_LOCK_CONFLICT;
- break;
-
-#ifndef BUILD_TDB2
- case TDB_ERR_NOLOCK:
- case TDB_ERR_LOCK_TIMEOUT:
- /*
- * These two ones in the enum are not actually used
- */
- result = NT_STATUS_FILE_LOCK_CONFLICT;
- break;
-#endif
- case TDB_ERR_NOEXIST:
- result = NT_STATUS_NOT_FOUND;
- break;
- case TDB_ERR_EINVAL:
- result = NT_STATUS_INVALID_PARAMETER;
- break;
- case TDB_ERR_RDONLY:
- result = NT_STATUS_ACCESS_DENIED;
- break;
-#ifndef BUILD_TDB2
- case TDB_ERR_NESTING:
- result = NT_STATUS_INTERNAL_ERROR;
- break;
-#endif
- };
- return result;
-}
-
int tdb_data_cmp(TDB_DATA t1, TDB_DATA t2)
{
int ret;
git.samba.org / ddiss / samba.git / blobdiff