/* This function serves as replacement for a missing fchownat function,   as well as a work around for the fchownat bug in glibc-2.4:    <http://lists.ubuntu.com/archives/ubuntu-users/2006-September/093218.html>   when the buggy fchownat-with-AT_SYMLINK_NOFOLLOW operates on a symlink, it   mistakenly affects the symlink referent, rather than the symlink itself.   Copyright (C) 2006-2007 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 Jim Meyering */#include <config.h>#include "openat.h"#include <unistd.h>#include "dirname.h" /* solely for definition of IS_ABSOLUTE_FILE_NAME */#include "save-cwd.h"#include "openat-priv.h"/* Replacement for Solaris' function by the same name.   Invoke chown or lchown on file, FILE, using OWNER and GROUP, in the   directory open on descriptor FD.  If FLAG is AT_SYMLINK_NOFOLLOW, then   use lchown, otherwise, use chown.  If possible, do it without changing   the working directory.  Otherwise, resort to using save_cwd/fchdir,   then mkdir/restore_cwd.  If either the save_cwd or the restore_cwd   fails, then give a diagnostic and exit nonzero.  */#define AT_FUNC_NAME fchownat#define AT_FUNC_F1 lchown#define AT_FUNC_F2 chown#define AT_FUNC_USE_F1_COND flag == AT_SYMLINK_NOFOLLOW#define AT_FUNC_POST_FILE_PARAM_DECLS , uid_t owner, gid_t group, int flag#define AT_FUNC_POST_FILE_ARGS        , owner, group#include "at-func.c"