1: /* Test whether a file has a nontrivial access control list.
    2: 
    3:    Copyright (C) 2002, 2003, 2005, 2006, 2007 Free Software Foundation, Inc.
    4: 
    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)
    8:    any later version.
    9: 
   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.
   14: 
   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.
   18: 
   19:    Written by Paul Eggert and Andreas Gruenbacher.  */
   20: 
   21: #include <config.h>
   22: 
   23: #include "acl.h"
   24: 
   25: #include "acl-internal.h"
   26: 
   27: /* Return 1 if NAME has a nontrivial access control list, 0 if NAME
   28:    only has no or a base access control list, and -1 (setting errno)
   29:    on error.  SB must be set to the stat buffer of FILE.  */
   30: 
   31: int
   32: file_has_acl (char const *name, struct stat const *sb)
   33: {
   34:   if (! S_ISLNK (sb->st_mode))
   35:     {
   36: #if USE_ACL && HAVE_ACL_TRIVIAL
   37: 
   38:       /* Solaris 10, which also has NFSv4 and ZFS style ACLs.  */
   39:       return acl_trivial (name);
   40: 
   41: #elif USE_ACL && HAVE_ACL && defined GETACLCNT
   42: 
   43:       /* Solaris 2.5 through Solaris 9, and contemporaneous versions of
   44:          HP-UX and Unixware.  */
   45:       int n = acl (name, GETACLCNT, 0, NULL);
   46:       return n < 0 ? (errno == ENOSYS ? 0 : -1) : (MIN_ACL_ENTRIES < n);
   47: 
   48: #elif USE_ACL && HAVE_ACL_GET_FILE && HAVE_ACL_FREE
   49: 
   50:       /* POSIX 1003.1e (draft 17 -- abandoned) specific version.  */
   51:       int ret;
   52: 
   53:       if (HAVE_ACL_EXTENDED_FILE)
   54:         ret = acl_extended_file (name);
   55:       else
   56:         {
   57:           acl_t acl = acl_get_file (name, ACL_TYPE_ACCESS);
   58:           if (acl)
   59:             {
   60:               ret = (3 < acl_entries (acl));
   61:               acl_free (acl);
   62:               if (ret == 0 && S_ISDIR (sb->st_mode))
   63:                 {
   64:                   acl = acl_get_file (name, ACL_TYPE_DEFAULT);
   65:                   if (acl)
   66:                     {
   67:                       ret = (0 < acl_entries (acl));
   68:                       acl_free (acl);
   69:                     }
   70:                   else
   71:                     ret = -1;
   72:                 }
   73:             }
   74:           else
   75:             ret = -1;
   76:         }
   77:       if (ret < 0)
   78:         return ACL_NOT_WELL_SUPPORTED (errno) ? 0 : -1;
   79:       return ret;
   80: #endif
   81:     }
   82: 
   83:   /* FIXME: Add support for AIX, Irix, and Tru64.  Please see Samba's
   84:      source/lib/sysacls.c file for fix-related ideas.  */
   85: 
   86:   return 0;
   87: }