glibc/sysdeps/mach/hurd/closedir.c

/* Copyright (C) 1993, 1995, 1996 Free Software Foundation, Inc.
This file is part of the GNU C Library.

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

The GNU C Library 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
Library General Public License for more details.

You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB.  If
not, write to the Free Software Foundation, Inc., 675 Mass Ave,
Cambridge, MA 02139, USA.  */

#include <errno.h>
#include <stddef.h>
#include <stdlib.h>
#include <dirent.h>
#include <unistd.h>
#include <hurd.h>
#include <hurd/fd.h>
#include "dirstream.h"

/* Close the directory stream DIRP.
   Return 0 if successful, -1 if not.  */
int
__closedir (DIR *dirp)
{
  error_t err;

  if (dirp == NULL)
    {
      errno = EINVAL;
      return -1;
    }

  __libc_lock_lock (dirp->__lock);
  err = __vm_deallocate (__mach_task_self (),
			 (vm_address_t) dirp->__data, dirp->__allocation);
  dirp->__data = NULL;
  err = _hurd_fd_close (dirp->__fd);

  if (err)
    {
      /* Unlock the DIR.  A failing closedir can be repeated (and may fail
	 again, but shouldn't deadlock).  */
      __libc_lock_unlock (dirp->__lock);
      return __hurd_fail (err);
    }

  /* Clean up the lock and free the structure.  */
  __libc_lock_fini (dirp->__lock);
  free (dirp);

  return 0;
}
weak_alias (__closedir, closedir)