1 /* acl.c - access control lists
3 Copyright (C) 2002, 2003, 2005 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 Street, Fifth Floor, Boston, MA 02110-1301, USA.
19 Written by Paul Eggert. */
25 #include <sys/types.h>
28 # define S_ISLNK(Mode) 0
38 #ifndef MIN_ACL_ENTRIES
39 # define MIN_ACL_ENTRIES 4
42 /* Return 1 if FILE has a nontrivial access control list, 0 if not,
43 and -1 (setting errno) if an error is encountered. */
46 file_has_acl (char const *file, struct stat const *filestat)
48 /* FIXME: This implementation should work on recent-enough versions
49 of HP-UX, Solaris, and Unixware, but it simply returns 0 with
50 POSIX 1003.1e (draft 17 -- abandoned), AIX, GNU/Linux, Irix, and
51 Tru64. Please see Samba's source/lib/sysacls.c file for
54 #if HAVE_ACL && defined GETACLCNT
55 if (! S_ISLNK (filestat->st_mode))
57 int n = acl (file, GETACLCNT, 0, NULL);
58 return n < 0 ? (errno == ENOSYS ? 0 : -1) : (MIN_ACL_ENTRIES < n);