Boot loader fixes - fix recursive malloc()/free() errors, NULL freed fields
[dragonfly.git] / lib / libstand / close.c
CommitLineData
984263bc 1/* $FreeBSD: src/lib/libstand/close.c,v 1.1.1.1.6.1 2000/09/10 01:32:06 ps Exp $ */
1de703da 2/* $DragonFly: src/lib/libstand/close.c,v 1.2 2003/06/17 04:26:51 dillon Exp $ */
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3/* $NetBSD: close.c,v 1.7 1997/01/22 00:38:09 cgd Exp $ */
4
5/*-
6 * Copyright (c) 1993
7 * The Regents of the University of California. All rights reserved.
8 *
9 * This code is derived from software contributed to Berkeley by
10 * The Mach Operating System project at Carnegie-Mellon University.
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 * 1. Redistributions of source code must retain the above copyright
16 * notice, this list of conditions and the following disclaimer.
17 * 2. Redistributions in binary form must reproduce the above copyright
18 * notice, this list of conditions and the following disclaimer in the
19 * documentation and/or other materials provided with the distribution.
20 * 3. All advertising materials mentioning features or use of this software
21 * must display the following acknowledgement:
22 * This product includes software developed by the University of
23 * California, Berkeley and its contributors.
24 * 4. Neither the name of the University nor the names of its contributors
25 * may be used to endorse or promote products derived from this software
26 * without specific prior written permission.
27 *
28 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
29 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
30 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
31 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
32 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
36 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
37 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
38 * SUCH DAMAGE.
39 *
40 * @(#)close.c 8.1 (Berkeley) 6/11/93
41 *
42 *
43 * Copyright (c) 1989, 1990, 1991 Carnegie Mellon University
44 * All Rights Reserved.
45 *
46 * Author: Alessandro Forin
47 *
48 * Permission to use, copy, modify and distribute this software and its
49 * documentation is hereby granted, provided that both the copyright
50 * notice and this permission notice appear in all copies of the
51 * software, derivative works or modified versions, and any portions
52 * thereof, and that both notices appear in supporting documentation.
53 *
54 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
55 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
56 * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
57 *
58 * Carnegie Mellon requests users of this software to return to
59 *
60 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
61 * School of Computer Science
62 * Carnegie Mellon University
63 * Pittsburgh PA 15213-3890
64 *
65 * any improvements or extensions that they make and grant Carnegie the
66 * rights to redistribute these changes.
67 */
68
69#include "stand.h"
70
71int
72close(int fd)
73{
74 struct open_file *f = &files[fd];
75 int err1 = 0, err2 = 0;
76
77 if ((unsigned)fd >= SOPEN_MAX || f->f_flags == 0) {
78 errno = EBADF;
79 return (-1);
80 }
6825e71f 81 if (f->f_rabuf != NULL) {
984263bc 82 free(f->f_rabuf);
6825e71f
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83 f->f_rabuf = NULL;
84 }
984263bc
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85 if (!(f->f_flags & F_RAW) && f->f_ops)
86 err1 = (f->f_ops->fo_close)(f);
87 if (!(f->f_flags & F_NODEV) && f->f_dev)
88 err2 = (f->f_dev->dv_close)(f);
89 if (f->f_devdata != NULL)
90 devclose(f);
91 f->f_flags = 0;
92 if (err1) {
93 errno = err1;
94 return (-1);
95 }
96 if (err2) {
97 errno = err2;
98 return (-1);
99 }
100 return (0);
101}