close.c revision 38451
138451Smsmith/* $NetBSD: close.c,v 1.7 1997/01/22 00:38:09 cgd Exp $ */ 238451Smsmith 338451Smsmith/*- 438451Smsmith * Copyright (c) 1993 538451Smsmith * The Regents of the University of California. All rights reserved. 638451Smsmith * 738451Smsmith * This code is derived from software contributed to Berkeley by 838451Smsmith * The Mach Operating System project at Carnegie-Mellon University. 938451Smsmith * 1038451Smsmith * Redistribution and use in source and binary forms, with or without 1138451Smsmith * modification, are permitted provided that the following conditions 1238451Smsmith * are met: 1338451Smsmith * 1. Redistributions of source code must retain the above copyright 1438451Smsmith * notice, this list of conditions and the following disclaimer. 1538451Smsmith * 2. Redistributions in binary form must reproduce the above copyright 1638451Smsmith * notice, this list of conditions and the following disclaimer in the 1738451Smsmith * documentation and/or other materials provided with the distribution. 1838451Smsmith * 3. All advertising materials mentioning features or use of this software 1938451Smsmith * must display the following acknowledgement: 2038451Smsmith * This product includes software developed by the University of 2138451Smsmith * California, Berkeley and its contributors. 2238451Smsmith * 4. Neither the name of the University nor the names of its contributors 2338451Smsmith * may be used to endorse or promote products derived from this software 2438451Smsmith * without specific prior written permission. 2538451Smsmith * 2638451Smsmith * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 2738451Smsmith * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 2838451Smsmith * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 2938451Smsmith * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 3038451Smsmith * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 3138451Smsmith * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 3238451Smsmith * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 3338451Smsmith * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 3438451Smsmith * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 3538451Smsmith * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 3638451Smsmith * SUCH DAMAGE. 3738451Smsmith * 3838451Smsmith * @(#)close.c 8.1 (Berkeley) 6/11/93 3938451Smsmith * 4038451Smsmith * 4138451Smsmith * Copyright (c) 1989, 1990, 1991 Carnegie Mellon University 4238451Smsmith * All Rights Reserved. 4338451Smsmith * 4438451Smsmith * Author: Alessandro Forin 4538451Smsmith * 4638451Smsmith * Permission to use, copy, modify and distribute this software and its 4738451Smsmith * documentation is hereby granted, provided that both the copyright 4838451Smsmith * notice and this permission notice appear in all copies of the 4938451Smsmith * software, derivative works or modified versions, and any portions 5038451Smsmith * thereof, and that both notices appear in supporting documentation. 5138451Smsmith * 5238451Smsmith * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" 5338451Smsmith * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR 5438451Smsmith * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 5538451Smsmith * 5638451Smsmith * Carnegie Mellon requests users of this software to return to 5738451Smsmith * 5838451Smsmith * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU 5938451Smsmith * School of Computer Science 6038451Smsmith * Carnegie Mellon University 6138451Smsmith * Pittsburgh PA 15213-3890 6238451Smsmith * 6338451Smsmith * any improvements or extensions that they make and grant Carnegie the 6438451Smsmith * rights to redistribute these changes. 6538451Smsmith */ 6638451Smsmith 6738451Smsmith#include "stand.h" 6838451Smsmith 6938451Smsmithint 7038451Smsmithclose(fd) 7138451Smsmith int fd; 7238451Smsmith{ 7338451Smsmith register struct open_file *f = &files[fd]; 7438451Smsmith int err1 = 0, err2 = 0; 7538451Smsmith 7638451Smsmith if ((unsigned)fd >= SOPEN_MAX || f->f_flags == 0) { 7738451Smsmith errno = EBADF; 7838451Smsmith return (-1); 7938451Smsmith } 8038451Smsmith if (!(f->f_flags & F_RAW) && f->f_ops) 8138451Smsmith err1 = (f->f_ops->fo_close)(f); 8238451Smsmith if (!(f->f_flags & F_NODEV) && f->f_dev) 8338451Smsmith err2 = (f->f_dev->dv_close)(f); 8438451Smsmith if (f->f_devdata != NULL) 8538451Smsmith devclose(f); 8638451Smsmith f->f_flags = 0; 8738451Smsmith if (err1) { 8838451Smsmith errno = err1; 8938451Smsmith return (-1); 9038451Smsmith } 9138451Smsmith if (err2) { 9238451Smsmith errno = err2; 9338451Smsmith return (-1); 9438451Smsmith } 9538451Smsmith return (0); 9638451Smsmith} 97