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- /* Copyright (C) 1991, 1992 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 <ansidecl.h>
- #include <errno.h>
- #include <unistd.h>
- #include <hurd.h>
-
- /* Close the file descriptor FD. */
- int
- DEFUN(__close, (fd), int fd)
- {
- struct _hurd_fd *d;
- io_t port, ctty;
-
- __mutex_lock (&_hurd_dtable_lock);
- if (fd < 0 || fd >= _hurd_dtable.size)
- {
- __mutex_unlock (&_hurd_dtable_lock);
- errno = EBADF;
- return -1;
- }
-
- d = &_hurd_dtable.d[fd];
- __spin_lock (d->port);
- port = d->port.port;
- ctty = d->ctty.port;
- d->port.port = d->ctty.port = MACH_PORT_NULL;
- d->port.user_dealloc = d->ctty.user_dealloc = NULL;
- d->flags = 0;
- __spin_unlock (&d->port);
-
- __mutex_unlock (&_hurd_dtable_lock);
-
- if (port == MACH_PORT_NULL)
- {
- errno = EBADF;
- return -1;
- }
-
- __mach_port_deallocate (__mach_task_self (), port);
- if (ctty != MACH_PORT_NULL)
- __mach_port_deallocate (__mach_task_self (), ctty);
-
- return 0;
- }
-