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/*
* lseek() for uClibc
*
* Copyright (C) 2000-2006 Erik Andersen <andersen@uclibc.org>
*
* Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
*/
#include <sys/syscall.h>
#include <unistd.h>
#include <cancel.h>
#ifdef __NR_lseek
# define __NR___lseek_nocancel __NR_lseek
_syscall3(off_t, __NC(lseek), int, fd, off_t, offset, int, whence)
#elif !defined __NR_lseek && defined __NR_llseek
#include <endian.h>
off_t __NC(lseek)(int fd, off_t offset, int whence)
{
#if __WORDSIZE == 32
__off64_t result;
return INLINE_SYSCALL(llseek, 5, fd,
(long) (((uint64_t) (offset)) >> 32),
(long) offset, &result, whence) ?: result;
#else
return lseek64(fd, offset, whence);
#endif
/* No need to handle __WORDSIZE == 64 as such a kernel won't define __NR_llseek */
}
#else
# include <errno.h>
off_t __NC(lseek)(int fd, off_t offset attribute_unused, int whence)
{
if (fd < 0) {
__set_errno(EBADF);
return -1;
}
switch(whence) {
case SEEK_SET:
case SEEK_CUR:
case SEEK_END:
break;
default:
__set_errno(EINVAL);
return -1;
}
__set_errno(ENOSYS);
return -1;
}
#endif
CANCELLABLE_SYSCALL(off_t, lseek, (int fd, off_t offset, int whence), (fd, offset, whence))
lt_libc_hidden(lseek)
#if __WORDSIZE == 64 || (!defined __NR__llseek && !defined __NR_llseek)
strong_alias_untyped(__NC(lseek),__NC(lseek64))
strong_alias_untyped(lseek,lseek64)
lt_strong_alias(lseek64)
lt_libc_hidden(lseek64)
#endif
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