1/* $NetBSD: fseek.c,v 1.23 2008/04/29 06:53:01 martin Exp $ */ 2 3/*- 4 * Copyright (c) 2005 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by David Laight. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32#include <sys/cdefs.h> 33#if defined(LIBC_SCCS) && !defined(lint) 34__RCSID("$NetBSD: fseek.c,v 1.23 2008/04/29 06:53:01 martin Exp $"); 35#endif /* LIBC_SCCS and not lint */ 36 37#include <sys/types.h> 38#include <sys/stat.h> 39 40#include "namespace.h" 41#include <assert.h> 42#include <errno.h> 43#include <fcntl.h> 44#include <stdio.h> 45#include <stdlib.h> 46#include "reentrant.h" 47#include "local.h" 48 49/* 50 * Seek the given file to the given offset. 51 * Zero extend the offset if SEEK_SET to allow access to 4GB files 52 */ 53int 54fseek(FILE *fp, long l_offset, int whence) 55{ 56 off_t offset; 57 58#if 0 59 /* This is a bad idea because makes fseek(fp, -6, SEEK_SET) work... */ 60 if (whence == SEEK_SET) 61 offset = (unsigned long)l_offset; 62 else 63#endif 64 offset = l_offset; 65 return fseeko(fp, offset, whence); 66} 67