1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
|
// SPDX-License-Identifier: CDDL-1.0
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or https://opensource.org/licenses/CDDL-1.0.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
*/
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <libzutil.h>
/* Substring from after the last slash, or the string itself if none */
const char *
zfs_basename(const char *path)
{
const char *bn = strrchr(path, '/');
return (bn ? bn + 1 : path);
}
/* Return index of last slash or -1 if none */
ssize_t
zfs_dirnamelen(const char *path)
{
const char *end = strrchr(path, '/');
return (end ? end - path : -1);
}
/*
* Given a shorthand device name check if a file by that name exists in any
* of the 'zpool_default_import_path' or ZPOOL_IMPORT_PATH directories. If
* one is found, store its fully qualified path in the 'path' buffer passed
* by the caller and return 0, otherwise return an error.
*/
int
zfs_resolve_shortname(const char *name, char *path, size_t len)
{
const char *env = getenv("ZPOOL_IMPORT_PATH");
char resolved_path[PATH_MAX];
if (env) {
for (;;) {
env += strspn(env, ":");
size_t dirlen = strcspn(env, ":");
if (dirlen) {
(void) snprintf(path, len, "%.*s/%s",
(int)dirlen, env, name);
if (access(path, F_OK) == 0)
return (0);
env += dirlen;
} else
break;
}
} else {
size_t count;
const char *const *zpool_default_import_path =
zpool_default_search_paths(&count);
for (size_t i = 0; i < count; ++i) {
(void) snprintf(path, len, "%s/%s",
zpool_default_import_path[i], name);
if (access(path, F_OK) == 0)
return (0);
}
}
/*
* The user can pass a relative path like ./file1 for the vdev. The path
* must contain a directory prefix like './file1' or '../file1'. Simply
* passing 'file1' is not allowed, as it may match a block device name.
*/
if ((strncmp(name, "./", 2) == 0 || strncmp(name, "../", 3) == 0) &&
realpath(name, resolved_path) != NULL) {
if (access(resolved_path, F_OK) == 0) {
if (strlen(resolved_path) + 1 <= len) {
if (strlcpy(path, resolved_path, len) < len)
return (0); /* success */
}
}
}
return (errno = ENOENT);
}
/*
* Given a shorthand device name look for a match against 'cmp_name'. This
* is done by checking all prefix expansions using either the default
* 'zpool_default_import_paths' or the ZPOOL_IMPORT_PATH environment
* variable. Proper partition suffixes will be appended if this is a
* whole disk. When a match is found 0 is returned otherwise ENOENT.
*/
static int
zfs_strcmp_shortname(const char *name, const char *cmp_name, int wholedisk)
{
int path_len, cmp_len, i = 0, error = ENOENT;
char *dir, *env, *envdup = NULL, *tmp = NULL;
char path_name[MAXPATHLEN];
const char *const *zpool_default_import_path = NULL;
size_t count;
cmp_len = strlen(cmp_name);
env = getenv("ZPOOL_IMPORT_PATH");
if (env) {
envdup = strdup(env);
dir = strtok_r(envdup, ":", &tmp);
} else {
zpool_default_import_path = zpool_default_search_paths(&count);
dir = (char *)zpool_default_import_path[i];
}
while (dir) {
/* Trim trailing directory slashes from ZPOOL_IMPORT_PATH */
if (env) {
while (dir[strlen(dir)-1] == '/')
dir[strlen(dir)-1] = '\0';
}
path_len = snprintf(path_name, MAXPATHLEN, "%s/%s", dir, name);
if (wholedisk)
path_len = zfs_append_partition(path_name, MAXPATHLEN);
if ((path_len == cmp_len) && strcmp(path_name, cmp_name) == 0) {
error = 0;
break;
}
if (env) {
dir = strtok_r(NULL, ":", &tmp);
} else if (++i < count) {
dir = (char *)zpool_default_import_path[i];
} else {
dir = NULL;
}
}
if (env)
free(envdup);
return (error);
}
/*
* Given either a shorthand or fully qualified path name look for a match
* against 'cmp'. The passed name will be expanded as needed for comparison
* purposes and redundant slashes stripped to ensure an accurate match.
*/
int
zfs_strcmp_pathname(const char *name, const char *cmp, int wholedisk)
{
int path_len, cmp_len;
char path_name[MAXPATHLEN];
char cmp_name[MAXPATHLEN];
char *dir, *tmp = NULL;
/* Strip redundant slashes if they exist due to ZPOOL_IMPORT_PATH */
cmp_name[0] = '\0';
(void) strlcpy(path_name, cmp, sizeof (path_name));
for (dir = strtok_r(path_name, "/", &tmp);
dir != NULL;
dir = strtok_r(NULL, "/", &tmp)) {
strlcat(cmp_name, "/", sizeof (cmp_name));
strlcat(cmp_name, dir, sizeof (cmp_name));
}
if (name[0] != '/')
return (zfs_strcmp_shortname(name, cmp_name, wholedisk));
(void) strlcpy(path_name, name, MAXPATHLEN);
path_len = strlen(path_name);
cmp_len = strlen(cmp_name);
if (wholedisk) {
path_len = zfs_append_partition(path_name, MAXPATHLEN);
if (path_len == -1)
return (ENOMEM);
}
if ((path_len != cmp_len) || strcmp(path_name, cmp_name))
return (ENOENT);
return (0);
}
|
