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 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