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/* vi: set sw=4 ts=4: */

/*

 * llseek/lseek64 syscall for uClibc

 *

 * Copyright (C) 2002 by Erik Andersen <andersen@codpoet.org>

 *

 * This program is free software; you can redistribute it and/or modify it

 * under the terms of the GNU Library General Public License as published by

 * the Free Software Foundation; either version 2 of the License, or (at your

 * option) any later version.

 *

 * This program is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public License

 * for more details.

 *

 * You should have received a copy of the GNU Library General Public License

 * along with this program; if not, write to the Free Software Foundation,

 * Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA

 *

 */

#define _GNU_SOURCE

#define _LARGEFILE64_SOURCE

#include <features.h>

#undef __OPTIMIZE__

/* We absolutely do _NOT_ want interfaces silently

 *  *  * renamed under us or very bad things will happen... */

#ifdef __USE_FILE_OFFSET64

# undef __USE_FILE_OFFSET64

#endif

#include <errno.h>

#include <sys/types.h>

#include <sys/syscall.h>

#if defined __NR__llseek && defined __UCLIBC_HAS_LFS__

#ifndef INLINE_SYSCALL

#define INLINE_SYSCALL(name, nr, args...) __syscall_llseek (args)

#define __NR___syscall_llseek __NR__llseek

static inline _syscall5(int, __syscall_llseek, int, fd, off_t, offset_hi,

                off_t, offset_lo, loff_t *, result, int, whence);

#endif

loff_t __libc_lseek64(int fd, loff_t offset, int whence)

{

        loff_t result;

        return(loff_t)(INLINE_SYSCALL (_llseek, 5, fd, (off_t) (offset >> 32),

                                (off_t) (offset & 0xffffffff), &result, whence) ?: result);

}

weak_alias(__libc_lseek64, llseek);

weak_alias(__libc_lseek64, lseek64);

#else

extern __off_t __libc_lseek(int fildes, off_t offset, int whence);

loff_t __libc_lseek64(int fd, loff_t offset, int whence)

{

        return(loff_t)(__libc_lseek(fd, (off_t) (offset & 0xffffffff), whence));

}

weak_alias(__libc_lseek, llseek)

weak_alias(__libc_lseek, lseek64)

#endif