lseek.c revision 7c478bd95313f5f23a4c958a745db2134aa03244
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright (c) 1999 by Sun Microsystems, Inc.
* All rights reserved.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
#include "compat.h"
#include <errno.h>
#include <syscall.h>
#include <sys/types.h>
#include <unistd.h>
extern int errno;
off_t lseek(int fd, off_t offset, int whence)
{
int off, ret;
if (whence < 0 || whence > 2) {
errno = EINVAL;
return (-1);
}
if (fd_get(fd) != -1) {
off = getmodsize(offset, sizeof(struct utmpx),
sizeof(struct compat_utmp));
if ((ret = _syscall(SYS_lseek, fd, off, whence)) == -1)
return(-1);
ret = getmodsize(ret, sizeof(struct compat_utmp),
sizeof(struct utmpx));
return (ret);
}
else
return (_syscall(SYS_lseek, fd, offset, whence));
}