powerpc: Fix fesetexceptflag [BZ#17885]
[glibc.git] / io / readlinkat.c
blob63b48ea1fe45aef80185225cb75e3a35ebb53486
1 /* Copyright (C) 2005-2015 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
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.
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.
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 <http://www.gnu.org/licenses/>. */
18 #include <errno.h>
19 #include <fcntl.h>
20 #include <unistd.h>
22 /* Read the contents of the symbolic link PATH relative to FD into no
23 more than LEN bytes of BUF. The contents are not null-terminated.
24 Returns the number of characters read, or -1 for errors. */
25 ssize_t
26 readlinkat (fd, path, buf, len)
27 int fd;
28 const char *path;
29 char *buf;
30 size_t len;
32 if (path == NULL)
34 __set_errno (EINVAL);
35 return -1;
38 if (fd != AT_FDCWD && fd < 0 && *path != '/')
40 __set_errno (EBADF);
41 return -1;
44 __set_errno (ENOSYS);
45 return -1;
47 stub_warning (readlinkat)
48 libc_hidden_def (readlinkat)