2 * Copyright (C) 2008-2009 Kay Sievers <kay@vrfy.org>
4 * This program is free software: you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation, either version 2 of the License, or
7 * (at your option) any later version.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program. If not, see <http://www.gnu.org/licenses/>.
27 #include "udev-util.h"
28 #include "udevadm-util.h"
34 static void exec_list(struct udev_enumerate *udev_enumerate, const char *action) {
35 struct udev_list_entry *entry;
37 udev_list_entry_foreach(entry, udev_enumerate_get_list_entry(udev_enumerate)) {
38 char filename[UTIL_PATH_SIZE];
42 printf("%s\n", udev_list_entry_get_name(entry));
45 strscpyl(filename, sizeof(filename), udev_list_entry_get_name(entry), "/uevent", NULL);
46 fd = open(filename, O_WRONLY|O_CLOEXEC);
49 if (write(fd, action, strlen(action)) < 0)
50 log_debug_errno(errno, "error writing '%s' to '%s': %m", action, filename);
55 static const char *keyval(const char *str, const char **val, char *buf, size_t size) {
58 strscpy(buf, size,str);
59 pos = strchr(buf, '=');
68 static void help(void) {
69 printf("%s trigger OPTIONS\n\n"
70 "Request events from the kernel.\n\n"
71 " -h --help Show this help\n"
72 " --version Show package version\n"
73 " -v --verbose Print the list of devices while running\n"
74 " -n --dry-run Do not actually trigger the events\n"
75 " -t --type= Type of events to trigger\n"
76 " devices sysfs devices (default)\n"
77 " subsystems sysfs subsystems and drivers\n"
78 " -c --action=ACTION Event action value, default is \"change\"\n"
79 " -s --subsystem-match=SUBSYSTEM Trigger devices from a matching subsystem\n"
80 " -S --subsystem-nomatch=SUBSYSTEM Exclude devices from a matching subsystem\n"
81 " -a --attr-match=FILE[=VALUE] Trigger devices with a matching attribute\n"
82 " -A --attr-nomatch=FILE[=VALUE] Exclude devices with a matching attribute\n"
83 " -p --property-match=KEY=VALUE Trigger devices with a matching property\n"
84 " -g --tag-match=KEY=VALUE Trigger devices with a matching property\n"
85 " -y --sysname-match=NAME Trigger devices with this /sys path\n"
86 " --name-match=NAME Trigger devices with this /dev name\n"
87 " -b --parent-match=NAME Trigger devices with that parent device\n"
88 , program_invocation_short_name);
91 static int adm_trigger(struct udev *udev, int argc, char *argv[]) {
96 static const struct option options[] = {
97 { "verbose", no_argument, NULL, 'v' },
98 { "dry-run", no_argument, NULL, 'n' },
99 { "type", required_argument, NULL, 't' },
100 { "action", required_argument, NULL, 'c' },
101 { "subsystem-match", required_argument, NULL, 's' },
102 { "subsystem-nomatch", required_argument, NULL, 'S' },
103 { "attr-match", required_argument, NULL, 'a' },
104 { "attr-nomatch", required_argument, NULL, 'A' },
105 { "property-match", required_argument, NULL, 'p' },
106 { "tag-match", required_argument, NULL, 'g' },
107 { "sysname-match", required_argument, NULL, 'y' },
108 { "name-match", required_argument, NULL, ARG_NAME },
109 { "parent-match", required_argument, NULL, 'b' },
110 { "help", no_argument, NULL, 'h' },
116 } device_type = TYPE_DEVICES;
117 const char *action = "change";
118 _cleanup_udev_enumerate_unref_ struct udev_enumerate *udev_enumerate = NULL;
121 udev_enumerate = udev_enumerate_new(udev);
122 if (udev_enumerate == NULL)
125 while ((c = getopt_long(argc, argv, "vno:t:c:s:S:a:A:p:g:y:b:h", options, NULL)) >= 0) {
128 char buf[UTIL_PATH_SIZE];
138 if (streq(optarg, "devices"))
139 device_type = TYPE_DEVICES;
140 else if (streq(optarg, "subsystems"))
141 device_type = TYPE_SUBSYSTEMS;
143 log_error("unknown type --type=%s", optarg);
148 if (!nulstr_contains("add\0" "remove\0" "change\0", optarg)) {
149 log_error("unknown action '%s'", optarg);
156 udev_enumerate_add_match_subsystem(udev_enumerate, optarg);
159 udev_enumerate_add_nomatch_subsystem(udev_enumerate, optarg);
162 key = keyval(optarg, &val, buf, sizeof(buf));
163 udev_enumerate_add_match_sysattr(udev_enumerate, key, val);
166 key = keyval(optarg, &val, buf, sizeof(buf));
167 udev_enumerate_add_nomatch_sysattr(udev_enumerate, key, val);
170 key = keyval(optarg, &val, buf, sizeof(buf));
171 udev_enumerate_add_match_property(udev_enumerate, key, val);
174 udev_enumerate_add_match_tag(udev_enumerate, optarg);
177 udev_enumerate_add_match_sysname(udev_enumerate, optarg);
180 _cleanup_udev_device_unref_ struct udev_device *dev;
182 dev = find_device(udev, optarg, "/sys");
184 log_error("unable to open the device '%s'", optarg);
188 udev_enumerate_add_match_parent(udev_enumerate, dev);
193 _cleanup_udev_device_unref_ struct udev_device *dev;
195 dev = find_device(udev, optarg, "/dev/");
197 log_error("unable to open the device '%s'", optarg);
201 udev_enumerate_add_match_parent(udev_enumerate, dev);
211 assert_not_reached("Unknown option");
215 for (; optind < argc; optind++) {
216 _cleanup_udev_device_unref_ struct udev_device *dev;
218 dev = find_device(udev, argv[optind], NULL);
220 log_error("unable to open the device '%s'", argv[optind]);
224 udev_enumerate_add_match_parent(udev_enumerate, dev);
227 switch (device_type) {
228 case TYPE_SUBSYSTEMS:
229 udev_enumerate_scan_subsystems(udev_enumerate);
230 exec_list(udev_enumerate, action);
233 udev_enumerate_scan_devices(udev_enumerate);
234 exec_list(udev_enumerate, action);
237 assert_not_reached("device_type");
241 const struct udevadm_cmd udevadm_trigger = {
244 .help = "Request events from the kernel",