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
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
|
/* libguestfs - guestfish and guestmount shared option parsing
* Copyright (C) 2010 Red Hat Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <config.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "c-ctype.h"
#include "guestfs.h"
#include "options.h"
/* Global that saves the root device between inspect_mount and
* print_inspect_prompt.
*/
static char *root = NULL;
static void
free_strings (char **argv)
{
int argc;
for (argc = 0; argv[argc] != NULL; ++argc)
free (argv[argc]);
free (argv);
}
static int
count_strings (char *const *argv)
{
int c;
for (c = 0; argv[c]; ++c)
;
return c;
}
static int
compare_keys_len (const void *p1, const void *p2)
{
const char *key1 = * (char * const *) p1;
const char *key2 = * (char * const *) p2;
return strlen (key1) - strlen (key2);
}
static int
compare_keys (const void *p1, const void *p2)
{
const char *key1 = * (char * const *) p1;
const char *key2 = * (char * const *) p2;
return strcasecmp (key1, key2);
}
/* This function implements the -i option. */
void
inspect_mount (void)
{
inspect_do_decrypt ();
char **roots = guestfs_inspect_os (g);
if (roots == NULL)
exit (EXIT_FAILURE);
if (roots[0] == NULL) {
fprintf (stderr, _("%s: no operating system was found on this disk\n"),
program_name);
exit (EXIT_FAILURE);
}
if (roots[1] != NULL) {
fprintf (stderr, _("%s: multi-boot operating systems are not supported by the -i option\n"),
program_name);
exit (EXIT_FAILURE);
}
root = roots[0];
free (roots);
inspect_mount_root (root);
}
void
inspect_mount_root (const char *root)
{
char **mountpoints = guestfs_inspect_get_mountpoints (g, root);
if (mountpoints == NULL)
exit (EXIT_FAILURE);
/* Sort by key length, shortest key first, so that we end up
* mounting the filesystems in the correct order.
*/
qsort (mountpoints, count_strings (mountpoints) / 2, 2 * sizeof (char *),
compare_keys_len);
size_t i;
for (i = 0; mountpoints[i] != NULL; i += 2) {
int r;
if (!read_only)
r = guestfs_mount_options (g, "", mountpoints[i+1], mountpoints[i]);
else
r = guestfs_mount_ro (g, mountpoints[i+1], mountpoints[i]);
if (r == -1)
exit (EXIT_FAILURE);
}
free_strings (mountpoints);
}
/* This function is called only if the above function was called,
* and only after we've printed the prompt in interactive mode.
*/
void
print_inspect_prompt (void)
{
char *name = guestfs_inspect_get_product_name (g, root);
if (STRNEQ (name, "unknown"))
printf (_("Operating system: %s\n"), name);
free (name);
char **mountpoints = guestfs_inspect_get_mountpoints (g, root);
if (mountpoints == NULL)
return;
/* Sort by key. */
qsort (mountpoints, count_strings (mountpoints) / 2, 2 * sizeof (char *),
compare_keys);
size_t i;
for (i = 0; mountpoints[i] != NULL; i += 2)
printf (_("%s mounted on %s\n"), mountpoints[i+1], mountpoints[i]);
free_strings (mountpoints);
}
/* Make a LUKS map name from the partition name,
* eg "/dev/vda2" => "luksvda2"
*/
static void
make_mapname (const char *device, char *mapname, size_t len)
{
size_t i = 0;
if (len < 5)
abort ();
strcpy (mapname, "luks");
mapname += 4;
len -= 4;
if (STRPREFIX (device, "/dev/"))
i = 5;
for (; device[i] != '\0' && len >= 1; ++i) {
if (c_isalnum (device[i])) {
*mapname++ = device[i];
len--;
}
}
*mapname = '\0';
}
/* Simple implementation of decryption: look for any crypto_LUKS
* partitions and decrypt them, then rescan for VGs. This only works
* for Fedora whole-disk encryption. WIP to make this work for other
* encryption schemes.
*/
void
inspect_do_decrypt (void)
{
char **partitions = guestfs_list_partitions (g);
if (partitions == NULL)
exit (EXIT_FAILURE);
int need_rescan = 0;
size_t i;
for (i = 0; partitions[i] != NULL; ++i) {
char *type = guestfs_vfs_type (g, partitions[i]);
if (type && STREQ (type, "crypto_LUKS")) {
char mapname[32];
make_mapname (partitions[i], mapname, sizeof mapname);
char *key = read_key (partitions[i]);
/* XXX Should we call guestfs_luks_open_ro if readonly flag
* is set? This might break 'mount_ro'.
*/
if (guestfs_luks_open (g, partitions[i], key, mapname) == -1)
exit (EXIT_FAILURE);
free (key);
need_rescan = 1;
}
free (type);
}
free_strings (partitions);
if (need_rescan) {
if (guestfs_vgscan (g) == -1)
exit (EXIT_FAILURE);
if (guestfs_vg_activate_all (g, 1) == -1)
exit (EXIT_FAILURE);
}
}
|
