1/* Read value of a symbolic link. Linux version.
2 Copyright (C) 2011-2023 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 <fcntl.h>
21#include <sysdep.h>
22
23/* Read the contents of the symbolic link PATH into no more than
24 LEN bytes of BUF. The contents are not null-terminated.
25 Returns the number of characters read, or -1 for errors. */
26ssize_t
27__readlink (const char *path, char *buf, size_t len)
28{
29#ifdef __NR_readlink
30 return INLINE_SYSCALL_CALL (readlink, path, buf, len);
31#else
32 return INLINE_SYSCALL_CALL (readlinkat, AT_FDCWD, path, buf, len);
33#endif
34}
35weak_alias (__readlink, readlink)
36