Subversion Repositories openrisc_2011-10-31

/*

 *  rtems_filesystem_evaluate_path()

 *

 *  Routine to seed the evaluate path routine.

 *

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

 */

#include <rtems.h>

#include "libio_.h"

int rtems_filesystem_evaluate_path(

  const char                        *pathname,

  int                                flags,

  rtems_filesystem_location_info_t  *pathloc,

  int                                follow_link

)

{

  int                           i;

  int                           result;

  rtems_filesystem_node_types_t type;

  /*

   * Verify Input parameters.

   */

  if ( !pathname )

    set_errno_and_return_minus_one( EFAULT );

  if ( !pathloc )

    set_errno_and_return_minus_one( EIO );       /* should never happen */

  /*

   * Evaluate the path using the optable evalpath.

   */

  rtems_filesystem_get_start_loc( pathname, &i, pathloc );

  result = (*pathloc->ops->evalpath)( &pathname[i], flags, pathloc );

  /*

   * Get the Node type and determine if you need to follow the link or

   * not.

   */

  if ( (result == 0) && follow_link ) {

    if ( !pathloc->ops->node_type )

      set_errno_and_return_minus_one( ENOTSUP );

    type = (*pathloc->ops->node_type)( pathloc );

    if ( ( type == RTEMS_FILESYSTEM_HARD_LINK ) ||

         ( type == RTEMS_FILESYSTEM_SYM_LINK ) ) {

        if ( !pathloc->ops->eval_link )

          set_errno_and_return_minus_one( ENOTSUP );

         result =  (*pathloc->ops->eval_link)( pathloc, flags );

    }

  }

  return result;

}