/* libdiskfs implementation of fs.defs: file_truncate
   Copyright (C) 1992, 1993, 1994, 1995 Free Software Foundation

   This program is free software; you can redistribute it and/or
   modify it under the terms of the GNU General Public License as
   published by the Free Software Foundation; either version 2, or (at
   your option) any later version.

   This program is distributed in the hope that it will be useful, but
   WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */

#include "priv.h"
#include "fs_S.h"
#include <fcntl.h>

/* Implement file_truncate as described in <hurd/fs.defs>. */
kern_return_t
diskfs_S_file_truncate (struct protid *cred,
			off_t size)
{
  CHANGE_NODE_FIELD (cred,
		   ({
		     if (!(cred->po->openstat & O_WRITE))
		       err = EINVAL;
		     else
		       err = diskfs_truncate (np, size);
		   }));
}