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
__libc_lseek(int fd,off_t offset,int whence)24 __libc_lseek (int fd, off_t offset, int whence)
25 {
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;
36 }
37
38 weak_alias (__libc_lseek, __lseek)
39 libc_hidden_def (__lseek)
40 weak_alias (__libc_lseek, lseek)
41