mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-23 05:20:06 +00:00
55 lines
1.7 KiB
C
55 lines
1.7 KiB
C
/* Linux lseek implementation, 64 bits off_t.
|
|
Copyright (C) 2016-2017 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
|
|
<http://www.gnu.org/licenses/>. */
|
|
|
|
#include <unistd.h>
|
|
#include <stdint.h>
|
|
#include <sys/types.h>
|
|
#include <sysdep.h>
|
|
#include <errno.h>
|
|
|
|
off64_t
|
|
__lseek64 (int fd, off64_t offset, int whence)
|
|
{
|
|
#ifdef __NR__llseek
|
|
loff_t res;
|
|
int rc = INLINE_SYSCALL_CALL (_llseek, fd,
|
|
(long) (((uint64_t) (offset)) >> 32),
|
|
(long) offset, &res, whence);
|
|
return rc ?: res;
|
|
#else
|
|
return INLINE_SYSCALL_CALL (lseek, fd, offset, whence);
|
|
#endif
|
|
}
|
|
|
|
#ifdef __OFF_T_MATCHES_OFF64_T
|
|
weak_alias (__lseek64, lseek)
|
|
weak_alias (__lseek64, __lseek)
|
|
strong_alias (__lseek64, __libc_lseek)
|
|
libc_hidden_def (__lseek)
|
|
#endif
|
|
|
|
strong_alias (__lseek64, __libc_lseek64)
|
|
weak_alias (__lseek64, lseek64)
|
|
|
|
/* llseek doesn't have a prototype. Since the second parameter is a
|
|
64bit type, this results in wrong behaviour if no prototype is
|
|
provided. */
|
|
weak_alias (__lseek64, llseek)
|
|
link_warning (llseek, "\
|
|
the `llseek' function may be dangerous; use `lseek64' instead.")
|