Renamed lxc_lock

src/liblxc/lock.c

-/*
- * lxc: linux Container library
- *
- * (C) Copyright IBM Corp. 2007, 2008
- *
- * Authors:
- * Daniel Lezcano <dlezcano at fr.ibm.com>
- *
- * 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 2.1 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, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- */
-
-#define _GNU_SOURCE
-#include <stdio.h>
-#undef _GNU_SOURCE
-#include <errno.h>
-#include <unistd.h>
-#include <stdlib.h>
-#include <sys/file.h>
-#include <lxc.h>
-
-int lxc_get_lock(const char *name)
-{
-	char *lock;
-	int fd, ret;
-
-	asprintf(&lock, LXCPATH "/%s", name);
-	fd = open(lock, O_RDONLY|O_DIRECTORY, S_IRUSR|S_IWUSR);
-	if (fd < 0) {
-		ret = -errno;
-		goto out;
-	}
-
-	fcntl(fd, F_SETFD, FD_CLOEXEC);
-
-	if (flock(fd, LOCK_EX|LOCK_NB)) {
-		ret = errno == EWOULDBLOCK ? 0 : -errno;
-		close(fd);
-		goto out;
-	}
-
-	ret = fd;
-out:
-	free(lock);
-	return ret;
-}
-
-void lxc_put_lock(int lock)
-{
-	flock(lock, LOCK_UN);
-	close(lock);
-}

src/liblxc/lock.h

-/*
- * lxc: linux Container library
- *
- * (C) Copyright IBM Corp. 2007, 2008
- *
- * Authors:
- * Daniel Lezcano <dlezcano at fr.ibm.com>
- *
- * 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 2.1 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, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- */
-#ifndef _lock_h
-#define _lock_h
-
-extern int lxc_get_lock(const char *name);
-
-extern int lxc_put_lock(int lock);
-
-#endif