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
|
/* libguestfs
* Copyright (C) 2009-2020 Red Hat Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <config.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "guestfs.h"
#include "guestfs-internal.h"
#include "guestfs-internal-actions.h"
char *
guestfs_impl_canonical_device_name (guestfs_h *g, const char *device)
{
char *ret;
size_t len;
/* /dev/hd etc. */
if (STRPREFIX (device, "/dev/") &&
strchr (device+5, '/') == NULL && /* not an LV name */
device[5] != 'm' && /* not /dev/md - RHBZ#1414682 */
((len = strcspn (device+5, "d")) > 0 && len <= 2)) {
/* NB! These do not need to be translated by
* device_name_translation. They will be translated if necessary
* when the caller uses them in APIs which go through to the
* daemon.
*/
ret = safe_asprintf (g, "/dev/sd%s", &device[5+len+1]);
}
else if (STRPREFIX (device, "/dev/mapper/") ||
STRPREFIX (device, "/dev/dm-")) {
/* Note about error behaviour: The API documentation is inconsistent
* but existing users expect that this API will not return an
* error but instead return the original string.
*
* In addition LUKS / BitLocker volumes return EINVAL here, which
* is an expected error.
*
* So in the error case the error message goes to debug and we
* return the original string.
*
* https://www.redhat.com/archives/libguestfs/2020-October/msg00061.html
*/
guestfs_push_error_handler (g, NULL, NULL);
ret = guestfs_lvm_canonical_lv_name (g, device);
guestfs_pop_error_handler (g);
if (ret == NULL)
ret = safe_strdup (g, device);
}
else
ret = safe_strdup (g, device);
return ret; /* caller frees */
}
|
