glibc/io/lseek64.c

48 lines
1.3 KiB
C

/* Copyright (C) 1991-2024 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#include <errno.h>
#include <unistd.h>
#include <sys/types.h>
/* Seek to OFFSET on FD, starting from WHENCE. */
off64_t
__libc_lseek64 (int fd, off64_t offset, 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;
}
weak_alias (__libc_lseek64, __lseek64)
weak_alias (__libc_lseek64, lseek64)
stub_warning (lseek64)