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fseek.c revision 1.21 
      1 /*	$NetBSD: fseek.c,v 1.21 2005/03/04 16:25:20 dsl 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  * 3. Neither the name of The NetBSD Foundation nor the names of its
     19  *    contributors may be used to endorse or promote products derived
     20  *    from this software without specific prior written permission.
     21  *
     22  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     23  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     24  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     25  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     26  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     27  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     28  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     29  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     30  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     31  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     32  * POSSIBILITY OF SUCH DAMAGE.
     33  */
     34 
     35 #include <sys/cdefs.h>
     36 #if defined(LIBC_SCCS) && !defined(lint)
     37 __RCSID("$NetBSD: fseek.c,v 1.21 2005/03/04 16:25:20 dsl Exp $");
     38 #endif /* LIBC_SCCS and not lint */
     39 
     40 #include <sys/types.h>
     41 #include <sys/stat.h>
     42 
     43 #include <assert.h>
     44 #include <errno.h>
     45 #include <fcntl.h>
     46 #include <stdio.h>
     47 #include <stdlib.h>
     48 #include "reentrant.h"
     49 #include "local.h"
     50 
     51 /*
     52  * Seek the given file to the given offset.
     53  * Zero extend the offset if SEEK_SET to allow access to 4GB files
     54  */
     55 int
     56 fseek(FILE *fp, long l_offset, int whence)
     57 {
     58 	off_t offset;
     59 
     60 	if (whence == SEEK_SET)
     61 		offset = (unsigned long)l_offset;
     62 	else
     63 		offset = l_offset;
     64 	return fseeko(fp, offset, whence);
     65 }
     66