1 | /* Copyright (C) 1991-2022 Free Software Foundation, Inc. |
2 | This file is part of the GNU C Library. |
3 | |
4 | The GNU C Library is free software; you can redistribute it and/or |
5 | modify it under the terms of the GNU Lesser General Public |
6 | License as published by the Free Software Foundation; either |
7 | version 2.1 of the License, or (at your option) any later version. |
8 | |
9 | The GNU C Library is distributed in the hope that it will be useful, |
10 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
12 | Lesser General Public License for more details. |
13 | |
14 | You should have received a copy of the GNU Lesser General Public |
15 | License along with the GNU C Library; if not, see |
16 | <https://www.gnu.org/licenses/>. */ |
17 | |
18 | #include <unistd.h> |
19 | #include <sys/types.h> |
20 | #include <errno.h> |
21 | |
22 | /* Seek to OFFSET on FD, starting from WHENCE. */ |
23 | off_t |
24 | __libc_lseek (int fd, off_t offset, int whence) |
25 | { |
26 | off64_t res64 = __libc_lseek64 (fd: fd, offset: (off64_t) offset, whence: whence); |
27 | off_t res = (off_t) res64; |
28 | |
29 | if (sizeof res != sizeof res64 && res != res64) |
30 | { |
31 | __set_errno (EOVERFLOW); |
32 | return (off_t) -1; |
33 | } |
34 | |
35 | return res; |
36 | } |
37 | |
38 | weak_alias (__libc_lseek, __lseek) |
39 | libc_hidden_def (__lseek) |
40 | weak_alias (__libc_lseek, lseek) |
41 | |