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/* acl.c - access control lists
Copyright (C) 2002, 2003, 2005 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 Paul Eggert. */
#if HAVE_CONFIG_H
# include <config.h>
#endif
#include <sys/types.h>
#include <sys/stat.h>
#ifndef S_ISLNK
# define S_ISLNK(Mode) 0
#endif
#include "acl.h"
#include <errno.h>
#ifndef ENOSYS
# define ENOSYS (-1)
#endif
#ifndef MIN_ACL_ENTRIES
# define MIN_ACL_ENTRIES 4
#endif
/* Return 1 if FILE has a nontrivial access control list, 0 if not,
and -1 (setting errno) if an error is encountered. */
int
file_has_acl (char const *file, struct stat const *filestat)
{
/* FIXME: This implementation should work on recent-enough versions
of HP-UX, Solaris, and Unixware, but it simply returns 0 with
POSIX 1003.1e (draft 17 -- abandoned), AIX, GNU/Linux, Irix, and
Tru64. Please see Samba's source/lib/sysacls.c file for
fix-related ideas. */
#if HAVE_ACL && defined GETACLCNT
if (! S_ISLNK (filestat->st_mode))
{
int n = acl (file, GETACLCNT, 0, NULL);
return n < 0 ? (errno == ENOSYS ? 0 : -1) : (MIN_ACL_ENTRIES < n);
}
#endif
return 0;
}
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