/*
 *  Copyright (C) 2006  James Antill
 *
 *  This library is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU Lesser General Public
 *  License as published by the Free Software Foundation; either
 *  version 2 of the License, or (at your option) any later version.
 *
 *  This library 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
 *  Lesser General Public License for more details.
 *
 *  You should have received a copy of the GNU Lesser General Public
 *  License along with this library; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 *  email: james@and.org
 */
/* Filters for an Xattr list */

#include "xattr_filter.h"
#include <string.h>

void xattr_filter(Xattrs *xattrs, int (*filter)(const Xattr_node *))
{
  size_t scan = 0;
  
  while (scan < xattrs->num)
  {
    if ((*filter)(xattrs->ents + scan))
    {
      xattr_del(xattrs, scan + 1);
      continue;
    }
    
    ++scan;
  }
}

int xattr_sc_filter_user(const Xattr_node *node)
{
  if (strncmp(node->key, "user.", strlen("user.")))
    return (1);

  return (0);
}

int xattr_sc_filter2_user(const Xattr_node *node)
{
  return !xattr_sc_filter_user(node);
}

int xattr_sc_filter_trusted(const Xattr_node *node)
{
  if (strncmp(node->key, "trusted.", strlen("trusted.")))
    return (1);

  return (0);
}

int xattr_sc_filter2_trusted(const Xattr_node *node)
{
  return !xattr_sc_filter_trusted(node);
}

int xattr_sc_filter_generic(const Xattr_node *node)
{
  return (xattr_sc_filter_user(node) ||
          xattr_sc_filter_trusted(node));
}

int xattr_sc_filter2_generic(const Xattr_node *node)
{
  return !xattr_sc_filter_generic(node);
}

int xattr_sc_filter_acls(const Xattr_node *node)
{
  /* filter both system.posix_acl_access and system.posix_acl_default */
  if (strncmp(node->key, "system.posix_acl_", strlen("system.posix_acl_")))
    return (1);

  return (0);
}

int xattr_sc_filter2_acls(const Xattr_node *node)
{
  return !xattr_sc_filter_acls(node);
}

int xattr_sc_filter_selinux(const Xattr_node *node)
{
  if (strncmp(node->key, "security.selinux", strlen("security.selinux")))
    return (1);

  return (0);
}

int xattr_sc_filter2_selinux(const Xattr_node *node)
{
  return !xattr_sc_filter_selinux(node);
}