Remove our copies of the samba libraries.

Packages are already available in debian unstable and will soon land in Fedora.
See BUILD.TXT for details.
We still keep libreplace as we still use its configure macros, until we find
time to extract only waht we need and have our own macros.

1 files changed, 0 insertions, 553 deletions

diff --git a/tdb/common/lock.c b/tdb/common/lock.c
deleted file mode 100644
index f156c0fa7..000000000
--- a/tdb/common/lock.c
+++ /dev/null
@@ -1,553 +0,0 @@
- /* 
-   Unix SMB/CIFS implementation.
-
-   trivial database library
-
-   Copyright (C) Andrew Tridgell              1999-2005
-   Copyright (C) Paul `Rusty' Russell		   2000
-   Copyright (C) Jeremy Allison			   2000-2003
-   
-     ** NOTE! The following LGPL license applies to the tdb
-     ** library. This does NOT imply that all of Samba is released
-     ** under the LGPL
-   
-   This library is free software; you can redistribute it and/or
-   modify it under the terms of the GNU Lesser General Public
-   License as published by the Free Software Foundation; either
-   version 3 of the License, or (at your option) any later version.
-
-   This library 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
-   Lesser General Public License for more details.
-
-   You should have received a copy of the GNU Lesser General Public
-   License along with this library; if not, see <http://www.gnu.org/licenses/>.
-*/
-
-#include "tdb_private.h"
-
-#define TDB_MARK_LOCK 0x80000000
-
-void tdb_setalarm_sigptr(struct tdb_context *tdb, volatile sig_atomic_t *ptr)
-{
-	tdb->interrupt_sig_ptr = ptr;
-}
-
-/* a byte range locking function - return 0 on success
-   this functions locks/unlocks 1 byte at the specified offset.
-
-   On error, errno is also set so that errors are passed back properly
-   through tdb_open(). 
-
-   note that a len of zero means lock to end of file
-*/
-int tdb_brlock(struct tdb_context *tdb, tdb_off_t offset, 
-	       int rw_type, int lck_type, int probe, size_t len)
-{
-	struct flock fl;
-	int ret;
-
-	if (tdb->flags & TDB_NOLOCK) {
-		return 0;
-	}
-
-	if ((rw_type == F_WRLCK) && (tdb->read_only || tdb->traverse_read)) {
-		tdb->ecode = TDB_ERR_RDONLY;
-		return -1;
-	}
-
-	fl.l_type = rw_type;
-	fl.l_whence = SEEK_SET;
-	fl.l_start = offset;
-	fl.l_len = len;
-	fl.l_pid = 0;
-
-	do {
-		ret = fcntl(tdb->fd,lck_type,&fl);
-
-		/* Check for a sigalarm break. */
-		if (ret == -1 && errno == EINTR &&
-				tdb->interrupt_sig_ptr &&
-				*tdb->interrupt_sig_ptr) {
-			break;
-		}
-	} while (ret == -1 && errno == EINTR);
-
-	if (ret == -1) {
-		/* Generic lock error. errno set by fcntl.
-		 * EAGAIN is an expected return from non-blocking
-		 * locks. */
-		if (!probe && lck_type != F_SETLK) {
-			/* Ensure error code is set for log fun to examine. */
-			tdb->ecode = TDB_ERR_LOCK;
-			TDB_LOG((tdb, TDB_DEBUG_TRACE,"tdb_brlock failed (fd=%d) at offset %d rw_type=%d lck_type=%d len=%d\n", 
-				 tdb->fd, offset, rw_type, lck_type, (int)len));
-		}
-		return TDB_ERRCODE(TDB_ERR_LOCK, -1);
-	}
-	return 0;
-}
-
-
-/*
-  upgrade a read lock to a write lock. This needs to be handled in a
-  special way as some OSes (such as solaris) have too conservative
-  deadlock detection and claim a deadlock when progress can be
-  made. For those OSes we may loop for a while.  
-*/
-int tdb_brlock_upgrade(struct tdb_context *tdb, tdb_off_t offset, size_t len)
-{
-	int count = 1000;
-	while (count--) {
-		struct timeval tv;
-		if (tdb_brlock(tdb, offset, F_WRLCK, F_SETLKW, 1, len) == 0) {
-			return 0;
-		}
-		if (errno != EDEADLK) {
-			break;
-		}
-		/* sleep for as short a time as we can - more portable than usleep() */
-		tv.tv_sec = 0;
-		tv.tv_usec = 1;
-		select(0, NULL, NULL, NULL, &tv);
-	}
-	TDB_LOG((tdb, TDB_DEBUG_TRACE,"tdb_brlock_upgrade failed at offset %d\n", offset));
-	return -1;
-}
-
-
-/* lock a list in the database. list -1 is the alloc list */
-static int _tdb_lock(struct tdb_context *tdb, int list, int ltype, int op)
-{
-	struct tdb_lock_type *new_lck;
-	int i;
-	bool mark_lock = ((ltype & TDB_MARK_LOCK) == TDB_MARK_LOCK);
-
-	ltype &= ~TDB_MARK_LOCK;
-
-	/* a global lock allows us to avoid per chain locks */
-	if (tdb->global_lock.count && 
-	    (ltype == tdb->global_lock.ltype || ltype == F_RDLCK)) {
-		return 0;
-	}
-
-	if (tdb->global_lock.count) {
-		return TDB_ERRCODE(TDB_ERR_LOCK, -1);
-	}
-
-	if (list < -1 || list >= (int)tdb->header.hash_size) {
-		TDB_LOG((tdb, TDB_DEBUG_ERROR,"tdb_lock: invalid list %d for ltype=%d\n", 
-			   list, ltype));
-		return -1;
-	}
-	if (tdb->flags & TDB_NOLOCK)
-		return 0;
-
-	for (i=0; i<tdb->num_lockrecs; i++) {
-		if (tdb->lockrecs[i].list == list) {
-			if (tdb->lockrecs[i].count == 0) {
-				/*
-				 * Can't happen, see tdb_unlock(). It should
-				 * be an assert.
-				 */
-				TDB_LOG((tdb, TDB_DEBUG_ERROR, "tdb_lock: "
-					 "lck->count == 0 for list %d", list));
-			}
-			/*
-			 * Just increment the in-memory struct, posix locks
-			 * don't stack.
-			 */
-			tdb->lockrecs[i].count++;
-			return 0;
-		}
-	}
-
-	new_lck = (struct tdb_lock_type *)realloc(
-		tdb->lockrecs,
-		sizeof(*tdb->lockrecs) * (tdb->num_lockrecs+1));
-	if (new_lck == NULL) {
-		errno = ENOMEM;
-		return -1;
-	}
-	tdb->lockrecs = new_lck;
-
-	/* Since fcntl locks don't nest, we do a lock for the first one,
-	   and simply bump the count for future ones */
-	if (!mark_lock &&
-	    tdb->methods->tdb_brlock(tdb,FREELIST_TOP+4*list, ltype, op,
-				     0, 1)) {
-		return -1;
-	}
-
-	tdb->num_locks++;
-
-	tdb->lockrecs[tdb->num_lockrecs].list = list;
-	tdb->lockrecs[tdb->num_lockrecs].count = 1;
-	tdb->lockrecs[tdb->num_lockrecs].ltype = ltype;
-	tdb->num_lockrecs += 1;
-
-	return 0;
-}
-
-/* lock a list in the database. list -1 is the alloc list */
-int tdb_lock(struct tdb_context *tdb, int list, int ltype)
-{
-	int ret;
-	ret = _tdb_lock(tdb, list, ltype, F_SETLKW);
-	if (ret) {
-		TDB_LOG((tdb, TDB_DEBUG_ERROR, "tdb_lock failed on list %d "
-			 "ltype=%d (%s)\n",  list, ltype, strerror(errno)));
-	}
-	return ret;
-}
-
-/* lock a list in the database. list -1 is the alloc list. non-blocking lock */
-int tdb_lock_nonblock(struct tdb_context *tdb, int list, int ltype)
-{
-	return _tdb_lock(tdb, list, ltype, F_SETLK);
-}
-
-
-/* unlock the database: returns void because it's too late for errors. */
-	/* changed to return int it may be interesting to know there
-	   has been an error  --simo */
-int tdb_unlock(struct tdb_context *tdb, int list, int ltype)
-{
-	int ret = -1;
-	int i;
-	struct tdb_lock_type *lck = NULL;
-	bool mark_lock = ((ltype & TDB_MARK_LOCK) == TDB_MARK_LOCK);
-
-	ltype &= ~TDB_MARK_LOCK;
-
-	/* a global lock allows us to avoid per chain locks */
-	if (tdb->global_lock.count && 
-	    (ltype == tdb->global_lock.ltype || ltype == F_RDLCK)) {
-		return 0;
-	}
-
-	if (tdb->global_lock.count) {
-		return TDB_ERRCODE(TDB_ERR_LOCK, -1);
-	}
-
-	if (tdb->flags & TDB_NOLOCK)
-		return 0;
-
-	/* Sanity checks */
-	if (list < -1 || list >= (int)tdb->header.hash_size) {
-		TDB_LOG((tdb, TDB_DEBUG_ERROR, "tdb_unlock: list %d invalid (%d)\n", list, tdb->header.hash_size));
-		return ret;
-	}
-
-	for (i=0; i<tdb->num_lockrecs; i++) {
-		if (tdb->lockrecs[i].list == list) {
-			lck = &tdb->lockrecs[i];
-			break;
-		}
-	}
-
-	if ((lck == NULL) || (lck->count == 0)) {
-		TDB_LOG((tdb, TDB_DEBUG_ERROR, "tdb_unlock: count is 0\n"));
-		return -1;
-	}
-
-	if (lck->count > 1) {
-		lck->count--;
-		return 0;
-	}
-
-	/*
-	 * This lock has count==1 left, so we need to unlock it in the
-	 * kernel. We don't bother with decrementing the in-memory array
-	 * element, we're about to overwrite it with the last array element
-	 * anyway.
-	 */
-
-	if (mark_lock) {
-		ret = 0;
-	} else {
-		ret = tdb->methods->tdb_brlock(tdb, FREELIST_TOP+4*list, F_UNLCK,
-					       F_SETLKW, 0, 1);
-	}
-	tdb->num_locks--;
-
-	/*
-	 * Shrink the array by overwriting the element just unlocked with the
-	 * last array element.
-	 */
-
-	if (tdb->num_lockrecs > 1) {
-		*lck = tdb->lockrecs[tdb->num_lockrecs-1];
-	}
-	tdb->num_lockrecs -= 1;
-
-	/*
-	 * We don't bother with realloc when the array shrinks, but if we have
-	 * a completely idle tdb we should get rid of the locked array.
-	 */
-
-	if (tdb->num_lockrecs == 0) {
-		SAFE_FREE(tdb->lockrecs);
-	}
-
-	if (ret)
-		TDB_LOG((tdb, TDB_DEBUG_ERROR, "tdb_unlock: An error occurred unlocking!\n")); 
-	return ret;
-}
-
-/*
-  get the transaction lock
- */
-int tdb_transaction_lock(struct tdb_context *tdb, int ltype)
-{
-	if (tdb->have_transaction_lock || tdb->global_lock.count) {
-		return 0;
-	}
-	if (tdb->methods->tdb_brlock(tdb, TRANSACTION_LOCK, ltype, 
-				     F_SETLKW, 0, 1) == -1) {
-		TDB_LOG((tdb, TDB_DEBUG_ERROR, "tdb_transaction_lock: failed to get transaction lock\n"));
-		tdb->ecode = TDB_ERR_LOCK;
-		return -1;
-	}
-	tdb->have_transaction_lock = 1;
-	return 0;
-}
-
-/*
-  release the transaction lock
- */
-int tdb_transaction_unlock(struct tdb_context *tdb)
-{
-	int ret;
-	if (!tdb->have_transaction_lock) {
-		return 0;
-	}
-	ret = tdb->methods->tdb_brlock(tdb, TRANSACTION_LOCK, F_UNLCK, F_SETLKW, 0, 1);
-	if (ret == 0) {
-		tdb->have_transaction_lock = 0;
-	}
-	return ret;
-}
-
-
-
-
-/* lock/unlock entire database */
-static int _tdb_lockall(struct tdb_context *tdb, int ltype, int op)
-{
-	bool mark_lock = ((ltype & TDB_MARK_LOCK) == TDB_MARK_LOCK);
-
-	ltype &= ~TDB_MARK_LOCK;
-
-	/* There are no locks on read-only dbs */
-	if (tdb->read_only || tdb->traverse_read)
-		return TDB_ERRCODE(TDB_ERR_LOCK, -1);
-
-	if (tdb->global_lock.count && tdb->global_lock.ltype == ltype) {
-		tdb->global_lock.count++;
-		return 0;
-	}
-
-	if (tdb->global_lock.count) {
-		/* a global lock of a different type exists */
-		return TDB_ERRCODE(TDB_ERR_LOCK, -1);
-	}
-	
-	if (tdb->num_locks != 0) {
-		/* can't combine global and chain locks */
-		return TDB_ERRCODE(TDB_ERR_LOCK, -1);
-	}
-
-	if (!mark_lock &&
-	    tdb->methods->tdb_brlock(tdb, FREELIST_TOP, ltype, op,
-				     0, 4*tdb->header.hash_size)) {
-		if (op == F_SETLKW) {
-			TDB_LOG((tdb, TDB_DEBUG_ERROR, "tdb_lockall failed (%s)\n", strerror(errno)));
-		}
-		return -1;
-	}
-
-	tdb->global_lock.count = 1;
-	tdb->global_lock.ltype = ltype;
-
-	return 0;
-}
-
-
-
-/* unlock entire db */
-static int _tdb_unlockall(struct tdb_context *tdb, int ltype)
-{
-	bool mark_lock = ((ltype & TDB_MARK_LOCK) == TDB_MARK_LOCK);
-
-	ltype &= ~TDB_MARK_LOCK;
-
-	/* There are no locks on read-only dbs */
-	if (tdb->read_only || tdb->traverse_read) {
-		return TDB_ERRCODE(TDB_ERR_LOCK, -1);
-	}
-
-	if (tdb->global_lock.ltype != ltype || tdb->global_lock.count == 0) {
-		return TDB_ERRCODE(TDB_ERR_LOCK, -1);
-	}
-
-	if (tdb->global_lock.count > 1) {
-		tdb->global_lock.count--;
-		return 0;
-	}
-
-	if (!mark_lock &&
-	    tdb->methods->tdb_brlock(tdb, FREELIST_TOP, F_UNLCK, F_SETLKW, 
-				     0, 4*tdb->header.hash_size)) {
-		TDB_LOG((tdb, TDB_DEBUG_ERROR, "tdb_unlockall failed (%s)\n", strerror(errno)));
-		return -1;
-	}
-
-	tdb->global_lock.count = 0;
-	tdb->global_lock.ltype = 0;
-
-	return 0;
-}
-
-/* lock entire database with write lock */
-int tdb_lockall(struct tdb_context *tdb)
-{
-	return _tdb_lockall(tdb, F_WRLCK, F_SETLKW);
-}
-
-/* lock entire database with write lock - mark only */
-int tdb_lockall_mark(struct tdb_context *tdb)
-{
-	return _tdb_lockall(tdb, F_WRLCK | TDB_MARK_LOCK, F_SETLKW);
-}
-
-/* unlock entire database with write lock - unmark only */
-int tdb_lockall_unmark(struct tdb_context *tdb)
-{
-	return _tdb_unlockall(tdb, F_WRLCK | TDB_MARK_LOCK);
-}
-
-/* lock entire database with write lock - nonblocking varient */
-int tdb_lockall_nonblock(struct tdb_context *tdb)
-{
-	return _tdb_lockall(tdb, F_WRLCK, F_SETLK);
-}
-
-/* unlock entire database with write lock */
-int tdb_unlockall(struct tdb_context *tdb)
-{
-	return _tdb_unlockall(tdb, F_WRLCK);
-}
-
-/* lock entire database with read lock */
-int tdb_lockall_read(struct tdb_context *tdb)
-{
-	return _tdb_lockall(tdb, F_RDLCK, F_SETLKW);
-}
-
-/* lock entire database with read lock - nonblock varient */
-int tdb_lockall_read_nonblock(struct tdb_context *tdb)
-{
-	return _tdb_lockall(tdb, F_RDLCK, F_SETLK);
-}
-
-/* unlock entire database with read lock */
-int tdb_unlockall_read(struct tdb_context *tdb)
-{
-	return _tdb_unlockall(tdb, F_RDLCK);
-}
-
-/* lock/unlock one hash chain. This is meant to be used to reduce
-   contention - it cannot guarantee how many records will be locked */
-int tdb_chainlock(struct tdb_context *tdb, TDB_DATA key)
-{
-	return tdb_lock(tdb, BUCKET(tdb->hash_fn(&key)), F_WRLCK);
-}
-
-/* lock/unlock one hash chain, non-blocking. This is meant to be used
-   to reduce contention - it cannot guarantee how many records will be
-   locked */
-int tdb_chainlock_nonblock(struct tdb_context *tdb, TDB_DATA key)
-{
-	return tdb_lock_nonblock(tdb, BUCKET(tdb->hash_fn(&key)), F_WRLCK);
-}
-
-/* mark a chain as locked without actually locking it. Warning! use with great caution! */
-int tdb_chainlock_mark(struct tdb_context *tdb, TDB_DATA key)
-{
-	return tdb_lock(tdb, BUCKET(tdb->hash_fn(&key)), F_WRLCK | TDB_MARK_LOCK);
-}
-
-/* unmark a chain as locked without actually locking it. Warning! use with great caution! */
-int tdb_chainlock_unmark(struct tdb_context *tdb, TDB_DATA key)
-{
-	return tdb_unlock(tdb, BUCKET(tdb->hash_fn(&key)), F_WRLCK | TDB_MARK_LOCK);
-}
-
-int tdb_chainunlock(struct tdb_context *tdb, TDB_DATA key)
-{
-	return tdb_unlock(tdb, BUCKET(tdb->hash_fn(&key)), F_WRLCK);
-}
-
-int tdb_chainlock_read(struct tdb_context *tdb, TDB_DATA key)
-{
-	return tdb_lock(tdb, BUCKET(tdb->hash_fn(&key)), F_RDLCK);
-}
-
-int tdb_chainunlock_read(struct tdb_context *tdb, TDB_DATA key)
-{
-	return tdb_unlock(tdb, BUCKET(tdb->hash_fn(&key)), F_RDLCK);
-}
-
-
-
-/* record lock stops delete underneath */
-int tdb_lock_record(struct tdb_context *tdb, tdb_off_t off)
-{
-	if (tdb->global_lock.count) {
-		return 0;
-	}
-	return off ? tdb->methods->tdb_brlock(tdb, off, F_RDLCK, F_SETLKW, 0, 1) : 0;
-}
-
-/*
-  Write locks override our own fcntl readlocks, so check it here.
-  Note this is meant to be F_SETLK, *not* F_SETLKW, as it's not
-  an error to fail to get the lock here.
-*/
-int tdb_write_lock_record(struct tdb_context *tdb, tdb_off_t off)
-{
-	struct tdb_traverse_lock *i;
-	for (i = &tdb->travlocks; i; i = i->next)
-		if (i->off == off)
-			return -1;
-	return tdb->methods->tdb_brlock(tdb, off, F_WRLCK, F_SETLK, 1, 1);
-}
-
-/*
-  Note this is meant to be F_SETLK, *not* F_SETLKW, as it's not
-  an error to fail to get the lock here.
-*/
-int tdb_write_unlock_record(struct tdb_context *tdb, tdb_off_t off)
-{
-	return tdb->methods->tdb_brlock(tdb, off, F_UNLCK, F_SETLK, 0, 1);
-}
-
-/* fcntl locks don't stack: avoid unlocking someone else's */
-int tdb_unlock_record(struct tdb_context *tdb, tdb_off_t off)
-{
-	struct tdb_traverse_lock *i;
-	uint32_t count = 0;
-
-	if (tdb->global_lock.count) {
-		return 0;
-	}
-
-	if (off == 0)
-		return 0;
-	for (i = &tdb->travlocks; i; i = i->next)
-		if (i->off == off)
-			count++;
-	return (count == 1 ? tdb->methods->tdb_brlock(tdb, off, F_UNLCK, F_SETLKW, 0, 1) : 0);
-}