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/>.
29 #include <sys/types.h>
30 #include <sys/socket.h>
34 #include "udev-util.h"
40 static void exec_list(struct udev_enumerate
*udev_enumerate
, const char *action
) {
41 struct udev_list_entry
*entry
;
43 udev_list_entry_foreach(entry
, udev_enumerate_get_list_entry(udev_enumerate
)) {
44 char filename
[UTIL_PATH_SIZE
];
48 printf("%s\n", udev_list_entry_get_name(entry
));
51 strscpyl(filename
, sizeof(filename
), udev_list_entry_get_name(entry
), "/uevent", NULL
);
52 fd
= open(filename
, O_WRONLY
|O_CLOEXEC
);
55 if (write(fd
, action
, strlen(action
)) < 0)
56 log_debug("error writing '%s' to '%s': %m", action
, filename
);
61 static const char *keyval(const char *str
, const char **val
, char *buf
, size_t size
) {
64 strscpy(buf
, size
,str
);
65 pos
= strchr(buf
, '=');
74 static void help(void) {
75 printf("Usage: udevadm trigger OPTIONS\n"
76 " -v,--verbose print the list of devices while running\n"
77 " -n,--dry-run do not actually trigger the events\n"
78 " -t,--type= type of events to trigger\n"
79 " devices sys devices (default)\n"
80 " subsystems sys subsystems and drivers\n"
81 " -c,--action=<action> event action value, default is \"change\"\n"
82 " -s,--subsystem-match=<subsystem> trigger devices from a matching subsystem\n"
83 " -S,--subsystem-nomatch=<subsystem> exclude devices from a matching subsystem\n"
84 " -a,--attr-match=<file[=<value>]> trigger devices with a matching attribute\n"
85 " -A,--attr-nomatch=<file[=<value>]> exclude devices with a matching attribute\n"
86 " -p,--property-match=<key>=<value> trigger devices with a matching property\n"
87 " -g,--tag-match=<key>=<value> trigger devices with a matching property\n"
88 " -y,--sysname-match=<name> trigger devices with a matching name\n"
89 " -b,--parent-match=<name> trigger devices with that parent device\n"
93 static int adm_trigger(struct udev
*udev
, int argc
, char *argv
[]) {
94 static const struct option options
[] = {
95 { "verbose", no_argument
, NULL
, 'v' },
96 { "dry-run", no_argument
, NULL
, 'n' },
97 { "type", required_argument
, NULL
, 't' },
98 { "action", required_argument
, NULL
, 'c' },
99 { "subsystem-match", required_argument
, NULL
, 's' },
100 { "subsystem-nomatch", required_argument
, NULL
, 'S' },
101 { "attr-match", required_argument
, NULL
, 'a' },
102 { "attr-nomatch", required_argument
, NULL
, 'A' },
103 { "property-match", required_argument
, NULL
, 'p' },
104 { "tag-match", required_argument
, NULL
, 'g' },
105 { "sysname-match", required_argument
, NULL
, 'y' },
106 { "parent-match", required_argument
, NULL
, 'b' },
107 { "help", no_argument
, NULL
, 'h' },
113 } device_type
= TYPE_DEVICES
;
114 const char *action
= "change";
115 _cleanup_udev_enumerate_unref_
struct udev_enumerate
*udev_enumerate
= NULL
;
118 udev_enumerate
= udev_enumerate_new(udev
);
119 if (udev_enumerate
== NULL
)
122 while ((c
= getopt_long(argc
, argv
, "vno:t:c:s:S:a:A:p:g:y:b:h", options
, NULL
)) >= 0) {
125 char buf
[UTIL_PATH_SIZE
];
135 if (streq(optarg
, "devices"))
136 device_type
= TYPE_DEVICES
;
137 else if (streq(optarg
, "subsystems"))
138 device_type
= TYPE_SUBSYSTEMS
;
140 log_error("unknown type --type=%s", optarg
);
145 if (!nulstr_contains("add\0" "remove\0" "change\0", optarg
)) {
146 log_error("unknown action '%s'", optarg
);
153 udev_enumerate_add_match_subsystem(udev_enumerate
, optarg
);
156 udev_enumerate_add_nomatch_subsystem(udev_enumerate
, optarg
);
159 key
= keyval(optarg
, &val
, buf
, sizeof(buf
));
160 udev_enumerate_add_match_sysattr(udev_enumerate
, key
, val
);
163 key
= keyval(optarg
, &val
, buf
, sizeof(buf
));
164 udev_enumerate_add_nomatch_sysattr(udev_enumerate
, key
, val
);
167 key
= keyval(optarg
, &val
, buf
, sizeof(buf
));
168 udev_enumerate_add_match_property(udev_enumerate
, key
, val
);
171 udev_enumerate_add_match_tag(udev_enumerate
, optarg
);
174 udev_enumerate_add_match_sysname(udev_enumerate
, optarg
);
177 char path
[UTIL_PATH_SIZE
];
178 struct udev_device
*dev
;
180 /* add sys dir if needed */
181 if (!startswith(optarg
, "/sys"))
182 strscpyl(path
, sizeof(path
), "/sys", optarg
, NULL
);
184 strscpy(path
, sizeof(path
), optarg
);
185 util_remove_trailing_chars(path
, '/');
186 dev
= udev_device_new_from_syspath(udev
, path
);
188 log_error("unable to open the device '%s'", optarg
);
191 udev_enumerate_add_match_parent(udev_enumerate
, dev
);
192 /* drop reference immediately, enumerate pins the device as long as needed */
193 udev_device_unref(dev
);
202 assert_not_reached("Unknown option");
207 fprintf(stderr
, "Extraneous argument: '%s'\n", argv
[optind
]);
211 switch (device_type
) {
212 case TYPE_SUBSYSTEMS
:
213 udev_enumerate_scan_subsystems(udev_enumerate
);
214 exec_list(udev_enumerate
, action
);
217 udev_enumerate_scan_devices(udev_enumerate
);
218 exec_list(udev_enumerate
, action
);
221 assert_not_reached("device_type");
225 const struct udevadm_cmd udevadm_trigger
= {
228 .help
= "request events from the kernel",