1 /* Copyright (C) 1994-2022 Free Software Foundation, Inc.
2    This file is part of the GNU C Library.
3 
4    The GNU C Library is free software; you can redistribute it and/or
5    modify it under the terms of the GNU Lesser General Public
6    License as published by the Free Software Foundation; either
7    version 2.1 of the License, or (at your option) any later version.
8 
9    The GNU C Library is distributed in the hope that it will be useful,
10    but WITHOUT ANY WARRANTY; without even the implied warranty of
11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
12    Lesser General Public License for more details.
13 
14    You should have received a copy of the GNU Lesser General Public
15    License along with the GNU C Library; if not, see
16    <https://www.gnu.org/licenses/>.  */
17 
18 #include <hurd/fd.h>
19 
20 error_t
_hurd_fd_close(struct hurd_fd * fd)21 _hurd_fd_close (struct hurd_fd *fd)
22 {
23   error_t err;
24 
25   HURD_CRITICAL_BEGIN;
26 
27   __spin_lock (&fd->port.lock);
28   if (fd->port.port == MACH_PORT_NULL)
29     {
30       __spin_unlock (&fd->port.lock);
31       err = EBADF;
32     }
33   else
34     {
35       /* Clear the descriptor's port cells.
36 	 This deallocates the ports if noone else is still using them.  */
37       _hurd_port_set (&fd->ctty, MACH_PORT_NULL);
38       _hurd_port_locked_set (&fd->port, MACH_PORT_NULL);
39       err = 0;
40     }
41 
42   HURD_CRITICAL_END;
43 
44   return err;
45 }
46