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Root/tags/2.0/i386/util/fdisk/opendev.c

Source at commit 1808 created 12 years 4 months ago.
By blackosx, Revise layout of package installer 'Welcome' file so it looks cleaner. Change the copyright notice to begin from 2009 as seen in the Chameleon 2.0 r431 installer. Should this date be set earlier?
1/*
2 * Copyright (c) 2002 Apple Computer, Inc. All rights reserved.
3 *
4 * @APPLE_LICENSE_HEADER_START@
5 *
6 * This file contains Original Code and/or Modifications of Original Code
7 * as defined in and that are subject to the Apple Public Source License
8 * Version 2.0 (the 'License'). You may not use this file except in
9 * compliance with the License. Please obtain a copy of the License at
10 * http://www.opensource.apple.com/apsl/ and read it before using this
11 * file.
12 *
13 * The Original Code and all software distributed under the License are
14 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
15 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
16 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
18 * Please see the License for the specific language governing rights and
19 * limitations under the License.
20 *
21 * @APPLE_LICENSE_HEADER_END@
22 */
23
24
25/*
26 * Copyright (c) 2000, Todd C. Miller. All rights reserved.
27 * Copyright (c) 1996, Jason Downs. All rights reserved.
28 *
29 * Redistribution and use in source and binary forms, with or without
30 * modification, are permitted provided that the following conditions
31 * are met:
32 * 1. Redistributions of source code must retain the above copyright
33 * notice, this list of conditions and the following disclaimer.
34 * 2. Redistributions in binary form must reproduce the above copyright
35 * notice, this list of conditions and the following disclaimer in the
36 * documentation and/or other materials provided with the distribution.
37 *
38 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS
39 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
40 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
41 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT,
42 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
43 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
44 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
45 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
46 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
47 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
48 * SUCH DAMAGE.
49 */
50
51#include <errno.h>
52#include <fcntl.h>
53#include <limits.h>
54#include <paths.h>
55#include <stdio.h>
56#include <string.h>
57
58#include "util.h"
59/*
60 * This routine is a generic rewrite of the original code found in
61 * disklabel(8).
62 */
63
64int
65opendev(path, oflags, dflags, realpath)
66char *path;
67int oflags;
68int dflags;
69char **realpath;
70{
71int fd;
72char *slash, *prefix;
73static char namebuf[PATH_MAX];
74
75/* Initial state */
76if (realpath)
77*realpath = path;
78fd = -1;
79errno = ENOENT;
80
81if (dflags & OPENDEV_BLCK)
82prefix = "";/* block device */
83else
84prefix = "r";/* character device */
85
86if ((slash = strchr(path, '/')))
87fd = open(path, oflags);
88else if (dflags & OPENDEV_PART) {
89/*
90 * First try raw partition (for removable drives)
91 */
92if (snprintf(namebuf, sizeof(namebuf), "%s%s%s%c",
93 _PATH_DEV, prefix, path, 'a' + getrawpartition())
94 < sizeof(namebuf)) {
95fd = open(namebuf, oflags);
96if (realpath)
97*realpath = namebuf;
98} else
99errno = ENAMETOOLONG;
100}
101if (!slash && fd == -1 && errno == ENOENT) {
102if (snprintf(namebuf, sizeof(namebuf), "%s%s%s",
103 _PATH_DEV, prefix, path) < sizeof(namebuf)) {
104fd = open(namebuf, oflags);
105if (realpath)
106*realpath = namebuf;
107} else
108errno = ENAMETOOLONG;
109}
110return (fd);
111}
112

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Revision: 1808