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
223
224
225
226
227
228
229
230
231
232
233
|
/*
* Copyright (C) 2008-2009 Kay Sievers <kay@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, 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, see <http://www.gnu.org/licenses/>.
*/
#include <stdlib.h>
#include <stddef.h>
#include <string.h>
#include <stdio.h>
#include <unistd.h>
#include <getopt.h>
#include <errno.h>
#include <dirent.h>
#include <fcntl.h>
#include <syslog.h>
#include <fnmatch.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/un.h>
#include "udev.h"
#include "udev-util.h"
#include "util.h"
static int verbose;
static int dry_run;
static void exec_list(struct udev_enumerate *udev_enumerate, const char *action)
{
struct udev_list_entry *entry;
udev_list_entry_foreach(entry, udev_enumerate_get_list_entry(udev_enumerate)) {
char filename[UTIL_PATH_SIZE];
int fd;
if (verbose)
printf("%s\n", udev_list_entry_get_name(entry));
if (dry_run)
continue;
strscpyl(filename, sizeof(filename), udev_list_entry_get_name(entry), "/uevent", NULL);
fd = open(filename, O_WRONLY|O_CLOEXEC);
if (fd < 0)
continue;
if (write(fd, action, strlen(action)) < 0)
log_debug("error writing '%s' to '%s': %m", action, filename);
close(fd);
}
}
static const char *keyval(const char *str, const char **val, char *buf, size_t size)
{
char *pos;
strscpy(buf, size,str);
pos = strchr(buf, '=');
if (pos != NULL) {
pos[0] = 0;
pos++;
}
*val = pos;
return buf;
}
static void help(void) {
printf("Usage: udevadm trigger OPTIONS\n"
" -v,--verbose print the list of devices while running\n"
" -n,--dry-run do not actually trigger the events\n"
" -t,--type= type of events to trigger\n"
" devices sys devices (default)\n"
" subsystems sys subsystems and drivers\n"
" -c,--action=<action> event action value, default is \"change\"\n"
" -s,--subsystem-match=<subsystem> trigger devices from a matching subsystem\n"
" -S,--subsystem-nomatch=<subsystem> exclude devices from a matching subsystem\n"
" -a,--attr-match=<file[=<value>]> trigger devices with a matching attribute\n"
" -A,--attr-nomatch=<file[=<value>]> exclude devices with a matching attribute\n"
" -p,--property-match=<key>=<value> trigger devices with a matching property\n"
" -g,--tag-match=<key>=<value> trigger devices with a matching property\n"
" -y,--sysname-match=<name> trigger devices with a matching name\n"
" -b,--parent-match=<name> trigger devices with that parent device\n"
" -h,--help\n\n");
}
static int adm_trigger(struct udev *udev, int argc, char *argv[])
{
static const struct option options[] = {
{ "verbose", no_argument, NULL, 'v' },
{ "dry-run", no_argument, NULL, 'n' },
{ "type", required_argument, NULL, 't' },
{ "action", required_argument, NULL, 'c' },
{ "subsystem-match", required_argument, NULL, 's' },
{ "subsystem-nomatch", required_argument, NULL, 'S' },
{ "attr-match", required_argument, NULL, 'a' },
{ "attr-nomatch", required_argument, NULL, 'A' },
{ "property-match", required_argument, NULL, 'p' },
{ "tag-match", required_argument, NULL, 'g' },
{ "sysname-match", required_argument, NULL, 'y' },
{ "parent-match", required_argument, NULL, 'b' },
{ "help", no_argument, NULL, 'h' },
{}
};
enum {
TYPE_DEVICES,
TYPE_SUBSYSTEMS,
} device_type = TYPE_DEVICES;
const char *action = "change";
_cleanup_udev_enumerate_unref_ struct udev_enumerate *udev_enumerate = NULL;
int c;
udev_enumerate = udev_enumerate_new(udev);
if (udev_enumerate == NULL)
return 1;
while ((c = getopt_long(argc, argv, "vno:t:c:s:S:a:A:p:g:y:b:h", options, NULL)) >= 0) {
const char *key;
const char *val;
char buf[UTIL_PATH_SIZE];
switch (c) {
case 'v':
verbose = 1;
break;
case 'n':
dry_run = 1;
break;
case 't':
if (streq(optarg, "devices"))
device_type = TYPE_DEVICES;
else if (streq(optarg, "subsystems"))
device_type = TYPE_SUBSYSTEMS;
else {
log_error("unknown type --type=%s", optarg);
return 2;
}
break;
case 'c':
if (!nulstr_contains("add\0" "remove\0" "change\0", optarg)) {
log_error("unknown action '%s'", optarg);
return 2;
} else
action = optarg;
break;
case 's':
udev_enumerate_add_match_subsystem(udev_enumerate, optarg);
break;
case 'S':
udev_enumerate_add_nomatch_subsystem(udev_enumerate, optarg);
break;
case 'a':
key = keyval(optarg, &val, buf, sizeof(buf));
udev_enumerate_add_match_sysattr(udev_enumerate, key, val);
break;
case 'A':
key = keyval(optarg, &val, buf, sizeof(buf));
udev_enumerate_add_nomatch_sysattr(udev_enumerate, key, val);
break;
case 'p':
key = keyval(optarg, &val, buf, sizeof(buf));
udev_enumerate_add_match_property(udev_enumerate, key, val);
break;
case 'g':
udev_enumerate_add_match_tag(udev_enumerate, optarg);
break;
case 'y':
udev_enumerate_add_match_sysname(udev_enumerate, optarg);
break;
case 'b': {
char path[UTIL_PATH_SIZE];
struct udev_device *dev;
/* add sys dir if needed */
if (!startswith(optarg, "/sys"))
strscpyl(path, sizeof(path), "/sys", optarg, NULL);
else
strscpy(path, sizeof(path), optarg);
util_remove_trailing_chars(path, '/');
dev = udev_device_new_from_syspath(udev, path);
if (dev == NULL) {
log_error("unable to open the device '%s'", optarg);
return 2;
}
udev_enumerate_add_match_parent(udev_enumerate, dev);
/* drop reference immediately, enumerate pins the device as long as needed */
udev_device_unref(dev);
break;
}
case 'h':
help();
return 0;
case '?':
return 1;
default:
assert_not_reached("Unknown option");
}
}
if (optind < argc) {
fprintf(stderr, "Extraneous argument: '%s'\n", argv[optind]);
return 1;
}
switch (device_type) {
case TYPE_SUBSYSTEMS:
udev_enumerate_scan_subsystems(udev_enumerate);
exec_list(udev_enumerate, action);
return 0;
case TYPE_DEVICES:
udev_enumerate_scan_devices(udev_enumerate);
exec_list(udev_enumerate, action);
return 0;
default:
assert_not_reached("device_type");
}
}
const struct udevadm_cmd udevadm_trigger = {
.name = "trigger",
.cmd = adm_trigger,
.help = "request events from the kernel",
};
|
