flock.c revision 7c478bd95313f5f23a4c958a745db2134aa03244
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 1990 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
#include <sys/file.h>
#include <sys/fcntl.h>
int flock(fd, operation)
int fd, operation;
{
struct flock fl;
int cmd = F_SETLKW;
fl.l_whence = 0;
fl.l_start = 0;
fl.l_len = 0;
fl.l_type = 0;
if (operation & LOCK_UN)
fl.l_type |= F_UNLCK;
if (operation & LOCK_SH)
fl.l_type |= F_RDLCK;
if (operation & LOCK_EX)
fl.l_type |= F_WRLCK;
if (operation & LOCK_NB)
cmd = F_SETLK;
return(bc_fcntl(fd, cmd, &fl));
}