/* acl.c - access control lists   Copyright (C) 2002 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.   Written by Paul Eggert.  */#if HAVE_CONFIG_H# include <config.h>#endif#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 PATH has a nontrivial access control list, 0 if not,   and -1 (setting errno) if an error is encountered.  */intfile_has_acl (char const *path, struct stat const *pathstat){  /* 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 (pathstat->st_mode))    {      int n = acl (path, GETACLCNT, 0, NULL);      return n < 0 ? (errno == ENOSYS ? 0 : -1) : (MIN_ACL_ENTRIES < n);    }#endif  return 0;}