| /* Error-checking, allocating wrapper for readlink. |
| Copyright (C) 2017-2018 Free Software Foundation, Inc. |
| This file is part of the GNU C Library. |
| |
| The GNU C Library is free software; you can redistribute it and/or |
| modify it under the terms of the GNU Lesser General Public |
| License as published by the Free Software Foundation; either |
| version 2.1 of the License, or (at your option) any later version. |
| |
| The GNU C Library is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| Lesser General Public License for more details. |
| |
| You should have received a copy of the GNU Lesser General Public |
| License along with the GNU C Library; if not, see |
| <http://www.gnu.org/licenses/>. */ |
| |
| #include <scratch_buffer.h> |
| #include <support/check.h> |
| #include <support/support.h> |
| #include <xunistd.h> |
| |
| char * |
| xreadlink (const char *path) |
| { |
| struct scratch_buffer buf; |
| scratch_buffer_init (&buf); |
| |
| while (true) |
| { |
| ssize_t count = readlink (path, buf.data, buf.length); |
| if (count < 0) |
| FAIL_EXIT1 ("readlink (\"%s\"): %m", path); |
| if (count < buf.length) |
| { |
| char *result = xstrndup (buf.data, count); |
| scratch_buffer_free (&buf); |
| return result; |
| } |
| if (!scratch_buffer_grow (&buf)) |
| FAIL_EXIT1 ("scratch_buffer_grow in xreadlink"); |
| } |
| } |