1/* Linux lseek implementation, 64 bits off_t.
2 Copyright (C) 2016-2020 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
9
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library. If not, see
17 <https://www.gnu.org/licenses/>. */
18
19#include <unistd.h>
20#include <stdint.h>
21#include <sys/types.h>
22#include <sysdep.h>
23#include <errno.h>
24#include <shlib-compat.h>
25
26off64_t
27__lseek64 (int fd, off64_t offset, int whence)
28{
29#ifdef __NR__llseek
30 loff_t res;
31 int rc = INLINE_SYSCALL_CALL (_llseek, fd,
32 (long) (((uint64_t) (offset)) >> 32),
33 (long) offset, &res, whence);
34 return rc ?: res;
35#else
36 return INLINE_SYSCALL_CALL (lseek, fd, offset, whence);
37#endif
38}
39
40#ifdef __OFF_T_MATCHES_OFF64_T
41weak_alias (__lseek64, lseek)
42weak_alias (__lseek64, __lseek)
43strong_alias (__lseek64, __libc_lseek)
44libc_hidden_def (__lseek)
45#endif
46
47strong_alias (__lseek64, __libc_lseek64)
48weak_alias (__lseek64, lseek64)
49
50#if SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_28)
51strong_alias (__lseek64, __compat_llseek)
52compat_symbol (libc, __compat_llseek, llseek, GLIBC_2_0);
53#endif
54