| xf.li | bdd93d5 | 2023-05-12 07:10:14 -0700 | [diff] [blame] | 1 | /* Copyright (C) 2005-2016 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 | <http://www.gnu.org/licenses/>. */ |
| 17 | |
| 18 | #include <errno.h> |
| 19 | #include <fcntl.h> |
| 20 | #include <unistd.h> |
| 21 | |
| 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 (int fd, const char *path, char *buf, size_t len) |
| 27 | { |
| 28 | if (path == NULL) |
| 29 | { |
| 30 | __set_errno (EINVAL); |
| 31 | return -1; |
| 32 | } |
| 33 | |
| 34 | if (fd != AT_FDCWD && fd < 0 && *path != '/') |
| 35 | { |
| 36 | __set_errno (EBADF); |
| 37 | return -1; |
| 38 | } |
| 39 | |
| 40 | __set_errno (ENOSYS); |
| 41 | return -1; |
| 42 | } |
| 43 | stub_warning (readlinkat) |
| 44 | libc_hidden_def (readlinkat) |