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
|
/*
* udev-remove.c
*
* Copyright (C) 2003 Greg Kroah-Hartman <greg@kroah.com>
* Copyright (C) 2004 Kay Sievers <kay.sievers@vrfy.org>
*
* 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 version 2 of the License.
*
* 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 <stdlib.h>
#include <string.h>
#include <stddef.h>
#include <stdio.h>
#include <fcntl.h>
#include <unistd.h>
#include <errno.h>
#include <sys/stat.h>
#include "udev.h"
static int delete_node(struct udevice *udev)
{
char filename[PATH_SIZE];
char devname[PATH_SIZE];
char partitionname[PATH_SIZE];
struct name_entry *name_loop;
struct stat stats;
int retval;
int i;
int num;
list_for_each_entry(name_loop, &udev->symlink_list, node) {
snprintf(filename, sizeof(filename), "%s/%s", udev_root, name_loop->name);
filename[sizeof(filename)-1] = '\0';
if (stat(filename, &stats) != 0) {
dbg("symlink '%s' not found", filename);
continue;
}
if (udev->devt && stats.st_rdev != udev->devt) {
info("symlink '%s' points to a different device, skip removal", filename);
continue;;
}
info("removing symlink '%s'", filename);
unlink(filename);
if (strchr(filename, '/'))
delete_path(filename);
}
snprintf(filename, sizeof(filename), "%s/%s", udev_root, udev->name);
filename[sizeof(filename)-1] = '\0';
if (stat(filename, &stats) != 0) {
dbg("device node '%s' not found", filename);
return -1;
}
if (udev->devt && stats.st_rdev != udev->devt) {
info("device node '%s' points to a different device, skip removal", filename);
return -1;
}
info("removing device node '%s'", filename);
retval = unlink_secure(filename);
if (retval)
return retval;
snprintf(devname, sizeof(devname), "%s/%s", udev_root, udev->name);
devname[sizeof(devname)-1] = '\0';
setenv("DEVNAME", devname, 1);
num = udev->partitions;
if (num > 0) {
info("removing all_partitions '%s[1-%i]'", filename, num);
if (num > 255) {
info("garbage from udev database, skip all_partitions removal");
return -1;
}
for (i = 1; i <= num; i++) {
snprintf(partitionname, sizeof(partitionname), "%s%d", filename, i);
partitionname[sizeof(partitionname)-1] = '\0';
unlink_secure(partitionname);
}
}
if (strchr(udev->name, '/'))
delete_path(filename);
return retval;
}
/*
* look up the sysfs path in the database to get the node name to remove
* If we can't find it, use kernel name for lack of anything else to know to do
*/
int udev_remove_device(struct udevice *udev)
{
if (major(udev->devt) == 0)
return 0;
if (udev_db_get_device(udev, udev->dev->devpath) == 0) {
if (udev->ignore_remove) {
dbg("remove event for '%s' requested to be ignored by rule", udev->name);
return 0;
}
dbg("remove name='%s'", udev->name);
udev_db_delete_device(udev);
} else {
dbg("'%s' not found in database, using kernel name '%s'", udev->dev->devpath, udev->dev->kernel_name);
strlcpy(udev->name, udev->dev->kernel_name, sizeof(udev->name));
}
return delete_node(udev);
}
|
