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2b778ceb | 1 | /* Copyright (C) 1991-2021 Free Software Foundation, Inc. |
ebbad4cc | 2 | This file is part of the GNU C Library. |
28f540f4 | 3 | |
ebbad4cc | 4 | The GNU C Library is free software; you can redistribute it and/or |
41bdb6e2 AJ |
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. | |
28f540f4 | 8 | |
ebbad4cc UD |
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 | |
41bdb6e2 | 12 | Lesser General Public License for more details. |
28f540f4 | 13 | |
41bdb6e2 | 14 | You should have received a copy of the GNU Lesser General Public |
59ba27a6 | 15 | License along with the GNU C Library; if not, see |
5a82c748 | 16 | <https://www.gnu.org/licenses/>. */ |
28f540f4 | 17 | |
28f540f4 | 18 | #include <unistd.h> |
337738b7 | 19 | #include <sys/types.h> |
faf7bbc2 | 20 | #include <errno.h> |
28f540f4 RM |
21 | |
22 | /* Seek to OFFSET on FD, starting from WHENCE. */ | |
23 | off_t | |
c1301d9a | 24 | __libc_lseek (int fd, off_t offset, int whence) |
28f540f4 | 25 | { |
faf7bbc2 ST |
26 | off64_t res64 = __libc_lseek64 (fd, (off64_t) offset, 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; | |
28f540f4 RM |
36 | } |
37 | ||
c1301d9a | 38 | weak_alias (__libc_lseek, __lseek) |
a4baf360 | 39 | libc_hidden_def (__lseek) |
c1301d9a | 40 | weak_alias (__libc_lseek, lseek) |