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 (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 22 /* 23 * Copyright 2006 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 <sys/syscall.h> 31 #include <unistd.h> 32 #include <errno.h> 33 #include <sys/fcntl.h> 34 #include <sys/param.h> 35 36 int 37 truncate(char *path, off_t length) 38 { 39 int fd, ret = 0; 40 41 CHKNULL(path); 42 43 if (strcmp(path, "/etc/mtab") == 0 || strcmp(path, "/etc/fstab") == 0) { 44 errno = ENOENT; 45 return (-1); 46 } 47 if ((fd = open(path, O_WRONLY)) == -1) { 48 return (-1); 49 } 50 51 if (ftruncate(fd, length) == -1) { 52 close(fd); 53 return (-1); 54 } 55 close(fd); 56 return (0); 57 } 58