/* 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 2, 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, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ /* 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 "lchown.h" #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"