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/>.
30 #include <sys/types.h>
31 #include <sys/socket.h>
35 #include "udev-util.h"
41 static void exec_list(struct udev_enumerate *udev_enumerate, const char *action)
43 struct udev_list_entry *entry;
45 udev_list_entry_foreach(entry, udev_enumerate_get_list_entry(udev_enumerate)) {
46 char filename[UTIL_PATH_SIZE];
50 printf("%s\n", udev_list_entry_get_name(entry));
53 strscpyl(filename, sizeof(filename), udev_list_entry_get_name(entry), "/uevent", NULL);
54 fd = open(filename, O_WRONLY|O_CLOEXEC);
57 if (write(fd, action, strlen(action)) < 0)
58 log_debug("error writing '%s' to '%s': %m", action, filename);
63 static const char *keyval(const char *str, const char **val, char *buf, size_t size)
67 strscpy(buf, size,str);
68 pos = strchr(buf, '=');
77 static void help(void) {
78 printf("Usage: udevadm trigger OPTIONS\n"
79 " -v,--verbose print the list of devices while running\n"
80 " -n,--dry-run do not actually trigger the events\n"
81 " -t,--type= type of events to trigger\n"
82 " devices sys devices (default)\n"
83 " subsystems sys subsystems and drivers\n"
84 " -c,--action=<action> event action value, default is \"change\"\n"
85 " -s,--subsystem-match=<subsystem> trigger devices from a matching subsystem\n"
86 " -S,--subsystem-nomatch=<subsystem> exclude devices from a matching subsystem\n"
87 " -a,--attr-match=<file[=<value>]> trigger devices with a matching attribute\n"
88 " -A,--attr-nomatch=<file[=<value>]> exclude devices with a matching attribute\n"
89 " -p,--property-match=<key>=<value> trigger devices with a matching property\n"
90 " -g,--tag-match=<key>=<value> trigger devices with a matching property\n"
91 " -y,--sysname-match=<name> trigger devices with a matching name\n"
92 " -b,--parent-match=<name> trigger devices with that parent device\n"
96 static int adm_trigger(struct udev *udev, int argc, char *argv[])
98 static const struct option options[] = {
99 { "verbose", no_argument, NULL, 'v' },
100 { "dry-run", no_argument, NULL, 'n' },
101 { "type", required_argument, NULL, 't' },
102 { "action", required_argument, NULL, 'c' },
103 { "subsystem-match", required_argument, NULL, 's' },
104 { "subsystem-nomatch", required_argument, NULL, 'S' },
105 { "attr-match", required_argument, NULL, 'a' },
106 { "attr-nomatch", required_argument, NULL, 'A' },
107 { "property-match", required_argument, NULL, 'p' },
108 { "tag-match", required_argument, NULL, 'g' },
109 { "sysname-match", required_argument, NULL, 'y' },
110 { "parent-match", required_argument, NULL, 'b' },
111 { "help", no_argument, NULL, 'h' },
117 } device_type = TYPE_DEVICES;
118 const char *action = "change";
119 _cleanup_udev_enumerate_unref_ struct udev_enumerate *udev_enumerate = NULL;
122 udev_enumerate = udev_enumerate_new(udev);
123 if (udev_enumerate == NULL)
126 while ((c = getopt_long(argc, argv, "vno:t:c:s:S:a:A:p:g:y:b:h", options, NULL)) >= 0) {
129 char buf[UTIL_PATH_SIZE];
139 if (streq(optarg, "devices"))
140 device_type = TYPE_DEVICES;
141 else if (streq(optarg, "subsystems"))
142 device_type = TYPE_SUBSYSTEMS;
144 log_error("unknown type --type=%s", optarg);
149 if (!nulstr_contains("add\0" "remove\0" "change\0", optarg)) {
150 log_error("unknown action '%s'", optarg);
157 udev_enumerate_add_match_subsystem(udev_enumerate, optarg);
160 udev_enumerate_add_nomatch_subsystem(udev_enumerate, optarg);
163 key = keyval(optarg, &val, buf, sizeof(buf));
164 udev_enumerate_add_match_sysattr(udev_enumerate, key, val);
167 key = keyval(optarg, &val, buf, sizeof(buf));
168 udev_enumerate_add_nomatch_sysattr(udev_enumerate, key, val);
171 key = keyval(optarg, &val, buf, sizeof(buf));
172 udev_enumerate_add_match_property(udev_enumerate, key, val);
175 udev_enumerate_add_match_tag(udev_enumerate, optarg);
178 udev_enumerate_add_match_sysname(udev_enumerate, optarg);
181 char path[UTIL_PATH_SIZE];
182 struct udev_device *dev;
184 /* add sys dir if needed */
185 if (!startswith(optarg, "/sys"))
186 strscpyl(path, sizeof(path), "/sys", optarg, NULL);
188 strscpy(path, sizeof(path), optarg);
189 util_remove_trailing_chars(path, '/');
190 dev = udev_device_new_from_syspath(udev, path);
192 log_error("unable to open the device '%s'", optarg);
195 udev_enumerate_add_match_parent(udev_enumerate, dev);
196 /* drop reference immediately, enumerate pins the device as long as needed */
197 udev_device_unref(dev);
206 assert_not_reached("Unknown option");
211 fprintf(stderr, "Extraneous argument: '%s'\n", argv[optind]);
215 switch (device_type) {
216 case TYPE_SUBSYSTEMS:
217 udev_enumerate_scan_subsystems(udev_enumerate);
218 exec_list(udev_enumerate, action);
221 udev_enumerate_scan_devices(udev_enumerate);
222 exec_list(udev_enumerate, action);
225 assert_not_reached("device_type");
229 const struct udevadm_cmd udevadm_trigger = {
232 .help = "request events from the kernel",