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/*

 *  unlink() - POSIX 1003.1b - 5.5.1 - Remove an existing link

 *

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

 */

#include <errno.h>

#include "libio_.h"

int unlink(

  const char *path

)

{

  rtems_filesystem_location_info_t  loc;

  int                               result;

  /*

   * Get the node to be unlinked.

   */

  result = rtems_filesystem_evaluate_path( path, 0, &loc, FALSE );

  if ( result != 0 )

     return -1;

  if ( !loc.ops->node_type ) {

    rtems_filesystem_freenode( &loc );

    set_errno_and_return_minus_one( ENOTSUP );

  }

  if (  (*loc.ops->node_type)( &loc ) == RTEMS_FILESYSTEM_DIRECTORY ) {

    rtems_filesystem_freenode( &loc );

    set_errno_and_return_minus_one( EISDIR );

  }

  if ( !loc.ops->unlink ) {

    rtems_filesystem_freenode( &loc );

    set_errno_and_return_minus_one( ENOTSUP );

  }

  result = (*loc.ops->unlink)( &loc );

  rtems_filesystem_freenode( &loc );

  return result;

}

/*

 *  _unlink_r

 *

 *  This is the Newlib dependent reentrant version of unlink().

 */

#if defined(RTEMS_NEWLIB)

#include <reent.h>

int _unlink_r(

  struct _reent *ptr,

  const char    *path

)

{

  return unlink( path );

}

#endif