Mercurial > illumos > onarm
comparison usr/src/cmd/mailx/lock.c @ 0:c9caec207d52 b86
Initial porting based on b86
author | Koji Uno <koji.uno@sun.com> |
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date | Tue, 02 Jun 2009 18:56:50 +0900 |
parents | |
children | 1a15d5aaf794 |
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-1:000000000000 | 0:c9caec207d52 |
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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 /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */ | |
23 /* All Rights Reserved */ | |
24 | |
25 | |
26 /* | |
27 * University Copyright- Copyright (c) 1982, 1986, 1988 | |
28 * The Regents of the University of California | |
29 * All Rights Reserved | |
30 * | |
31 * University Acknowledgment- Portions of this document are derived from | |
32 * software developed by the University of California, Berkeley, and its | |
33 * contributors. | |
34 */ | |
35 | |
36 #pragma ident "@(#)lock.c 1.15 05/06/08 SMI" | |
37 | |
38 /* | |
39 * lock a file pointer | |
40 */ | |
41 | |
42 #include <stdio.h> | |
43 #include <string.h> | |
44 #include <fcntl.h> | |
45 | |
46 int | |
47 lock(FILE *fp, char *mode, int blk) | |
48 { | |
49 struct flock l; | |
50 | |
51 l.l_type = !strcmp(mode, "r") ? F_RDLCK : F_WRLCK; | |
52 l.l_whence = 0; | |
53 l.l_start = l.l_len = 0L; | |
54 return fcntl(fileno(fp), blk ? F_SETLKW : F_SETLK, &l); | |
55 } |