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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