1/* This function serves as replacement for a missing fchownat function, 2 as well as a work around for the fchownat bug in glibc-2.4: 3 <http://lists.ubuntu.com/archives/ubuntu-users/2006-September/093218.html> 4 when the buggy fchownat-with-AT_SYMLINK_NOFOLLOW operates on a symlink, it 5 mistakenly affects the symlink referent, rather than the symlink itself. 6 7 Copyright (C) 2006-2007 Free Software Foundation, Inc. 8 9 This program is free software; you can redistribute it and/or modify 10 it under the terms of the GNU General Public License as published by 11 the Free Software Foundation; either version 2, or (at your option) 12 any later version. 13 14 This program is distributed in the hope that it will be useful, 15 but WITHOUT ANY WARRANTY; without even the implied warranty of 16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 17 GNU General Public License for more details. 18 19 You should have received a copy of the GNU General Public License 20 along with this program; if not, write to the Free Software Foundation, 21 Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ 22 23/* written by Jim Meyering */ 24 25#include <config.h> 26 27#include "openat.h" 28 29#include <unistd.h> 30 31#include "dirname.h" /* solely for definition of IS_ABSOLUTE_FILE_NAME */ 32#include "lchown.h" 33#include "save-cwd.h" 34#include "openat-priv.h" 35 36/* Replacement for Solaris' function by the same name. 37 Invoke chown or lchown on file, FILE, using OWNER and GROUP, in the 38 directory open on descriptor FD. If FLAG is AT_SYMLINK_NOFOLLOW, then 39 use lchown, otherwise, use chown. If possible, do it without changing 40 the working directory. Otherwise, resort to using save_cwd/fchdir, 41 then mkdir/restore_cwd. If either the save_cwd or the restore_cwd 42 fails, then give a diagnostic and exit nonzero. */ 43 44#define AT_FUNC_NAME fchownat 45#define AT_FUNC_F1 lchown 46#define AT_FUNC_F2 chown 47#define AT_FUNC_USE_F1_COND flag == AT_SYMLINK_NOFOLLOW 48#define AT_FUNC_POST_FILE_PARAM_DECLS , uid_t owner, gid_t group, int flag 49#define AT_FUNC_POST_FILE_ARGS , owner, group 50#include "at-func.c" 51