1 /* Determine whether we can write any file.
3 Copyright (C) 2007 Free Software Foundation, Inc.
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation; either version 2, or (at your option)
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with this program; if not, write to the Free Software Foundation,
17 Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. */
19 /* Written by Paul Eggert. */
23 #include "write-any-file.h"
30 /* Return true if we know that we can write any file, including
31 writing directories. */
34 can_write_any_file (void)
36 static bool initialized;
37 static bool can_write;
42 #if defined PRIV_EFFECTIVE && defined PRIV_FILE_DAC_WRITE
43 priv_set_t *pset = priv_allocset ();
47 (getppriv (PRIV_EFFECTIVE, pset) == 0
48 && priv_ismember (pset, PRIV_FILE_DAC_WRITE));
52 /* In traditional Unix, only root can unlink directories. */
53 can = (geteuid () == 0);