62 lines
1.7 KiB
C
62 lines
1.7 KiB
C
/* Copyright (C) 1991, 1992 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If
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not, write to the Free Software Foundation, Inc., 675 Mass Ave,
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Cambridge, MA 02139, USA. */
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#include <ansidecl.h>
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#include <errno.h>
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#include <unistd.h>
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#include <hurd.h>
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/* Close the file descriptor FD. */
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int
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DEFUN(__close, (fd), int fd)
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{
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struct _hurd_fd *d;
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io_t port, ctty;
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__mutex_lock (&_hurd_dtable_lock);
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if (fd < 0 || fd >= _hurd_dtable.size)
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{
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__mutex_unlock (&_hurd_dtable_lock);
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errno = EBADF;
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return -1;
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}
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d = &_hurd_dtable.d[fd];
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__spin_lock (d->port);
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port = d->port.port;
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ctty = d->ctty.port;
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d->port.port = d->ctty.port = MACH_PORT_NULL;
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d->port.user_dealloc = d->ctty.user_dealloc = NULL;
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d->flags = 0;
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__spin_unlock (&d->port);
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__mutex_unlock (&_hurd_dtable_lock);
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if (port == MACH_PORT_NULL)
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{
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errno = EBADF;
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return -1;
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}
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__mach_port_deallocate (__mach_task_self (), port);
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if (ctty != MACH_PORT_NULL)
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__mach_port_deallocate (__mach_task_self (), ctty);
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return 0;
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}
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