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[/] [openrisc/] [trunk/] [rtos/] [rtems/] [c/] [src/] [lib/] [libc/] [eval.c] - Blame information for rev 173

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1 30 unneback
/*
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 *  rtems_filesystem_evaluate_path()
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 *
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 *  Routine to seed the evaluate path routine.
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 *
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 *  COPYRIGHT (c) 1989-1999.
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 *  On-Line Applications Research Corporation (OAR).
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 *
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 *  The license and distribution terms for this file may be
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 *  found in the file LICENSE in this distribution or at
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 *  http://www.OARcorp.com/rtems/license.html.
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 *
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 *  $Id: eval.c,v 1.2 2001-09-27 12:01:15 chris Exp $
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 */
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#include <rtems.h>
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#include "libio_.h"
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int rtems_filesystem_evaluate_path(
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  const char                        *pathname,
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  int                                flags,
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  rtems_filesystem_location_info_t  *pathloc,
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  int                                follow_link
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)
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{
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  int                           i;
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  int                           result;
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  rtems_filesystem_node_types_t type;
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  /*
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   * Verify Input parameters.
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   */
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  if ( !pathname )
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    set_errno_and_return_minus_one( EFAULT );
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  if ( !pathloc )
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    set_errno_and_return_minus_one( EIO );       /* should never happen */
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  /*
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   * Evaluate the path using the optable evalpath.
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   */
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  rtems_filesystem_get_start_loc( pathname, &i, pathloc );
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  result = (*pathloc->ops->evalpath)( &pathname[i], flags, pathloc );
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  /*
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   * Get the Node type and determine if you need to follow the link or
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   * not.
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   */
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  if ( (result == 0) && follow_link ) {
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    if ( !pathloc->ops->node_type )
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      set_errno_and_return_minus_one( ENOTSUP );
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    type = (*pathloc->ops->node_type)( pathloc );
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    if ( ( type == RTEMS_FILESYSTEM_HARD_LINK ) ||
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         ( type == RTEMS_FILESYSTEM_SYM_LINK ) ) {
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        if ( !pathloc->ops->eval_link )
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          set_errno_and_return_minus_one( ENOTSUP );
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         result =  (*pathloc->ops->eval_link)( pathloc, flags );
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    }
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  }
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  return result;
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}
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