Subversion Repositories openrisc_2011-10-31

/*

 *  IMFS Node Removal Handler

 *

 *  This file contains the handler used to remove a node when a file type

 *  does not require special actions.

 *

 *  COPYRIGHT (c) 1989-1999.

 *  On-Line Applications Research Corporation (OAR).

 *

 *  The license and distribution terms for this file may be

 *  found in the file LICENSE in this distribution or at

 *  http://www.OARcorp.com/rtems/license.html.

 *

 *  $Id: imfs_rmnod.c,v 1.2 2001-09-27 12:01:15 chris Exp $

 */

#include <rtems.h>

#include <rtems/libio.h>

#include "libio_.h"

#include "imfs.h"

/*

 *  IMFS_rmnod

 */

int IMFS_rmnod(

  rtems_filesystem_location_info_t      *pathloc       /* IN */

)

{

  IMFS_jnode_t *the_jnode;

  the_jnode = (IMFS_jnode_t *) pathloc->node_access;

  /*

   * Take the node out of the parent's chain that contains this node

   */

  if ( the_jnode->Parent != NULL ) {

    Chain_Extract( (Chain_Node *) the_jnode );

    the_jnode->Parent = NULL;

  }

  /*

   * Decrement the link counter and see if we can free the space.

   */

  the_jnode->st_nlink--;

  IMFS_update_ctime( the_jnode );

  /*

   * The file cannot be open and the link must be less than 1 to free.

   */

  if ( !rtems_libio_is_file_open( the_jnode ) && (the_jnode->st_nlink < 1) ) {

    /*

     * Is rtems_filesystem_current this node?

     */

    if ( rtems_filesystem_current.node_access == pathloc->node_access )

       rtems_filesystem_current.node_access = NULL;

    /*

     * Free memory associated with a memory file.

     */

    free( the_jnode );

  }

  return 0;

}