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 "chkpath.h" 30 #include <syscall.h> 31 #include <unistd.h> 32 #include <errno.h> 33 #include <sys/fcntl.h> 34 #include <sys/param.h> 35 36 extern int errno; 37 38 int truncate(path, length) 39 char *path; 40 off_t length; 41 { 42 int fd, ret=0; 43 44 CHKNULL(path); 45 46 if (strcmp(path, "/etc/mtab") == 0 || strcmp(path, "/etc/fstab") == 0) { 47 errno = ENOENT; 48 return(-1); 49 } 50 if ((fd = open(path, O_WRONLY)) == -1) { 51 return(-1); 52 } 53 54 if (ftruncate(fd, length) == -1) { 55 close(fd); 56 return(-1); 57 } 58 close(fd); 59 return(0); 60 } 61