/* Check the access rights of a file relative to an open directory. Copyright (C) 2009 Free Software Foundation, Inc. This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3 of the License, or (at your option) any later version. This program 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 General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see <http://www.gnu.org/licenses/>. */ /* written by Eric Blake */ #include <config.h> #include <unistd.h> #ifndef HAVE_ACCESS /* Mingw lacks access, but it also lacks real vs. effective ids, so the gnulib euidaccess module is good enough. */ # undef access # define access euidaccess #endif /* Invoke access or euidaccess on file, FILE, using mode MODE, in the directory open on descriptor FD. If possible, do it without changing the working directory. Otherwise, resort to using save_cwd/fchdir, then (access|euidaccess)/restore_cwd. If either the save_cwd or the restore_cwd fails, then give a diagnostic and exit nonzero. Note that this implementation only supports AT_EACCESS, although some native versions also support AT_SYMLINK_NOFOLLOW. */ #define AT_FUNC_NAME faccessat #define AT_FUNC_F1 euidaccess #define AT_FUNC_F2 access #define AT_FUNC_USE_F1_COND AT_EACCESS #define AT_FUNC_POST_FILE_PARAM_DECLS , int mode, int flag #define AT_FUNC_POST_FILE_ARGS , mode #include "at-func.c"