1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License, Version 1.0 only
6 * (the "License"). You may not use this file except in compliance
7 * with the License.
8 *
9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10 * or http://www.opensolaris.org/os/licensing.
11 * See the License for the specific language governing permissions
12 * and limitations under the License.
13 *
14 * When distributing Covered Code, include this CDDL HEADER in each
15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16 * If applicable, add the following below this CDDL HEADER, with the
17 * fields enclosed by brackets "[]" replaced with your own identifying
18 * information: Portions Copyright [yyyy] [name of copyright owner]
19 *
20 * CDDL HEADER END
21 */
22 /*
23 * Copyright 1990 Sun Microsystems, Inc. All rights reserved.
24 * Use is subject to license terms.
25 */
26
27 #pragma ident "%Z%%M% %I% %E% SMI"
28
29 #include <sys/file.h>
30 #include <sys/fcntl.h>
31
flock(fd,operation)32 int flock(fd, operation)
33 int fd, operation;
34 {
35 struct flock fl;
36 int cmd = F_SETLKW;
37
38 fl.l_whence = 0;
39 fl.l_start = 0;
40 fl.l_len = 0;
41 fl.l_type = 0;
42 if (operation & LOCK_UN)
43 fl.l_type |= F_UNLCK;
44 if (operation & LOCK_SH)
45 fl.l_type |= F_RDLCK;
46 if (operation & LOCK_EX)
47 fl.l_type |= F_WRLCK;
48 if (operation & LOCK_NB)
49 cmd = F_SETLK;
50 return(bc_fcntl(fd, cmd, &fl));
51 }
52