1 |
|
|
/* $OpenBSD: opendisk.c,v 1.7 2014/06/30 00:26:22 deraadt Exp $ */ |
2 |
|
|
/* $NetBSD: opendisk.c,v 1.4 1997/09/30 17:13:50 phil Exp $ */ |
3 |
|
|
|
4 |
|
|
/*- |
5 |
|
|
* Copyright (c) 1997 The NetBSD Foundation, Inc. |
6 |
|
|
* All rights reserved. |
7 |
|
|
* |
8 |
|
|
* This code is derived from software contributed to The NetBSD Foundation |
9 |
|
|
* by Luke Mewburn. |
10 |
|
|
* |
11 |
|
|
* Redistribution and use in source and binary forms, with or without |
12 |
|
|
* modification, are permitted provided that the following conditions |
13 |
|
|
* are met: |
14 |
|
|
* 1. Redistributions of source code must retain the above copyright |
15 |
|
|
* notice, this list of conditions and the following disclaimer. |
16 |
|
|
* 2. Redistributions in binary form must reproduce the above copyright |
17 |
|
|
* notice, this list of conditions and the following disclaimer in the |
18 |
|
|
* documentation and/or other materials provided with the distribution. |
19 |
|
|
* |
20 |
|
|
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS |
21 |
|
|
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED |
22 |
|
|
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
23 |
|
|
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS |
24 |
|
|
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
25 |
|
|
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
26 |
|
|
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
27 |
|
|
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
28 |
|
|
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
29 |
|
|
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
30 |
|
|
* POSSIBILITY OF SUCH DAMAGE. |
31 |
|
|
*/ |
32 |
|
|
|
33 |
|
|
#include <sys/types.h> |
34 |
|
|
|
35 |
|
|
#include <errno.h> |
36 |
|
|
#include <fcntl.h> |
37 |
|
|
#include <paths.h> |
38 |
|
|
#include <stdio.h> |
39 |
|
|
#include <string.h> |
40 |
|
|
|
41 |
|
|
#include "util.h" |
42 |
|
|
|
43 |
|
|
int |
44 |
|
|
opendisk(const char *path, int flags, char *buf, size_t buflen, int iscooked) |
45 |
|
|
{ |
46 |
|
|
int f, rawpart; |
47 |
|
|
|
48 |
|
|
snprintf(buf, buflen, "%s", path); |
49 |
|
|
|
50 |
|
|
if ((flags & O_CREAT) != 0) { |
51 |
|
|
errno = EINVAL; |
52 |
|
|
return (-1); |
53 |
|
|
} |
54 |
|
|
|
55 |
|
|
rawpart = getrawpartition(); |
56 |
|
|
if (rawpart < 0) |
57 |
|
|
return (-1); /* sysctl(3) in getrawpartition sets errno */ |
58 |
|
|
|
59 |
|
|
f = open(buf, flags); |
60 |
|
|
if (f != -1 || errno != ENOENT) |
61 |
|
|
return (f); |
62 |
|
|
|
63 |
|
|
snprintf(buf, buflen, "%s%c", path, 'a' + rawpart); |
64 |
|
|
f = open(buf, flags); |
65 |
|
|
if (f != -1 || errno != ENOENT) |
66 |
|
|
return (f); |
67 |
|
|
|
68 |
|
|
if (strchr(path, '/') != NULL) |
69 |
|
|
return (-1); |
70 |
|
|
|
71 |
|
|
snprintf(buf, buflen, "%s%s%s", _PATH_DEV, iscooked ? "" : "r", path); |
72 |
|
|
f = open(buf, flags); |
73 |
|
|
if (f != -1 || errno != ENOENT) |
74 |
|
|
return (f); |
75 |
|
|
|
76 |
|
|
snprintf(buf, buflen, "%s%s%s%c", _PATH_DEV, iscooked ? "" : "r", path, |
77 |
|
|
'a' + rawpart); |
78 |
|
|
f = open(buf, flags); |
79 |
|
|
return (f); |
80 |
|
|
} |