2 This file is part of systemd.
4 Copyright 2008-2012 Kay Sievers <kay@vrfy.org>
6 systemd is free software; you can redistribute it and/or modify it
7 under the terms of the GNU Lesser General Public License as published by
8 the Free Software Foundation; either version 2.1 of the License, or
9 (at your option) any later version.
11 systemd is distributed in the hope that it will be useful, but
12 WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Lesser General Public License for more details.
16 You should have received a copy of the GNU Lesser General Public License
17 along with systemd; If not, see <http://www.gnu.org/licenses/>.
22 #include <sys/epoll.h>
29 #include "stdio-util.h"
30 #include "string-util.h"
31 #include "udev-util.h"
34 static void print_device(struct udev_device
*device
) {
38 struct udev_list_entry
*list_entry
;
40 log_info("*** device: %p ***", device
);
41 str
= udev_device_get_action(device
);
43 log_info("action: '%s'", str
);
45 str
= udev_device_get_syspath(device
);
46 log_info("syspath: '%s'", str
);
48 str
= udev_device_get_sysname(device
);
49 log_info("sysname: '%s'", str
);
51 str
= udev_device_get_sysnum(device
);
53 log_info("sysnum: '%s'", str
);
55 str
= udev_device_get_devpath(device
);
56 log_info("devpath: '%s'", str
);
58 str
= udev_device_get_subsystem(device
);
60 log_info("subsystem: '%s'", str
);
62 str
= udev_device_get_devtype(device
);
64 log_info("devtype: '%s'", str
);
66 str
= udev_device_get_driver(device
);
68 log_info("driver: '%s'", str
);
70 str
= udev_device_get_devnode(device
);
72 log_info("devname: '%s'", str
);
74 devnum
= udev_device_get_devnum(device
);
75 if (major(devnum
) > 0)
76 log_info("devnum: %u:%u", major(devnum
), minor(devnum
));
79 udev_list_entry_foreach(list_entry
, udev_device_get_devlinks_list_entry(device
)) {
80 log_info("link: '%s'", udev_list_entry_get_name(list_entry
));
84 log_info("found %i links", count
);
87 udev_list_entry_foreach(list_entry
, udev_device_get_properties_list_entry(device
)) {
88 log_info("property: '%s=%s'",
89 udev_list_entry_get_name(list_entry
),
90 udev_list_entry_get_value(list_entry
));
94 log_info("found %i properties", count
);
96 str
= udev_device_get_property_value(device
, "MAJOR");
98 log_info("MAJOR: '%s'", str
);
100 str
= udev_device_get_sysattr_value(device
, "dev");
102 log_info("attr{dev}: '%s'", str
);
105 static void test_device(struct udev
*udev
, const char *syspath
) {
106 _cleanup_udev_device_unref_
struct udev_device
*device
;
108 log_info("looking at device: %s", syspath
);
109 device
= udev_device_new_from_syspath(udev
, syspath
);
111 log_warning_errno(errno
, "udev_device_new_from_syspath: %m");
113 print_device(device
);
116 static void test_device_parents(struct udev
*udev
, const char *syspath
) {
117 _cleanup_udev_device_unref_
struct udev_device
*device
;
118 struct udev_device
*device_parent
;
120 log_info("looking at device: %s", syspath
);
121 device
= udev_device_new_from_syspath(udev
, syspath
);
125 log_info("looking at parents");
126 device_parent
= device
;
128 print_device(device_parent
);
129 device_parent
= udev_device_get_parent(device_parent
);
130 } while (device_parent
!= NULL
);
132 log_info("looking at parents again");
133 device_parent
= device
;
135 print_device(device_parent
);
136 device_parent
= udev_device_get_parent(device_parent
);
137 } while (device_parent
!= NULL
);
140 static void test_device_devnum(struct udev
*udev
) {
141 dev_t devnum
= makedev(1, 3);
142 _cleanup_udev_device_unref_
struct udev_device
*device
;
144 log_info("looking up device: %u:%u", major(devnum
), minor(devnum
));
145 device
= udev_device_new_from_devnum(udev
, 'c', devnum
);
147 log_warning_errno(errno
, "udev_device_new_from_devnum: %m");
149 print_device(device
);
152 static void test_device_subsys_name(struct udev
*udev
, const char *subsys
, const char *dev
) {
153 _cleanup_udev_device_unref_
struct udev_device
*device
;
155 log_info("looking up device: '%s:%s'", subsys
, dev
);
156 device
= udev_device_new_from_subsystem_sysname(udev
, subsys
, dev
);
158 log_warning_errno(errno
, "udev_device_new_from_subsystem_sysname: %m");
160 print_device(device
);
163 static int test_enumerate_print_list(struct udev_enumerate
*enumerate
) {
164 struct udev_list_entry
*list_entry
;
167 udev_list_entry_foreach(list_entry
, udev_enumerate_get_list_entry(enumerate
)) {
168 struct udev_device
*device
;
170 device
= udev_device_new_from_syspath(udev_enumerate_get_udev(enumerate
),
171 udev_list_entry_get_name(list_entry
));
172 if (device
!= NULL
) {
173 log_info("device: '%s' (%s)",
174 udev_device_get_syspath(device
),
175 udev_device_get_subsystem(device
));
176 udev_device_unref(device
);
180 log_info("found %i devices", count
);
184 static void test_monitor(struct udev
*udev
) {
185 _cleanup_udev_monitor_unref_
struct udev_monitor
*udev_monitor
;
186 _cleanup_close_
int fd_ep
;
188 struct epoll_event ep_udev
= {
192 .data
.fd
= STDIN_FILENO
,
195 fd_ep
= epoll_create1(EPOLL_CLOEXEC
);
196 assert_se(fd_ep
>= 0);
198 udev_monitor
= udev_monitor_new_from_netlink(udev
, "udev");
199 assert_se(udev_monitor
!= NULL
);
201 fd_udev
= udev_monitor_get_fd(udev_monitor
);
202 ep_udev
.data
.fd
= fd_udev
;
204 assert_se(udev_monitor_filter_add_match_subsystem_devtype(udev_monitor
, "block", NULL
) >= 0);
205 assert_se(udev_monitor_filter_add_match_subsystem_devtype(udev_monitor
, "tty", NULL
) >= 0);
206 assert_se(udev_monitor_filter_add_match_subsystem_devtype(udev_monitor
, "usb", "usb_device") >= 0);
208 assert_se(udev_monitor_enable_receiving(udev_monitor
) >= 0);
210 assert_se(epoll_ctl(fd_ep
, EPOLL_CTL_ADD
, fd_udev
, &ep_udev
) >= 0);
211 assert_se(epoll_ctl(fd_ep
, EPOLL_CTL_ADD
, STDIN_FILENO
, &ep_stdin
) >= 0);
215 struct epoll_event ev
[4];
216 struct udev_device
*device
;
219 printf("waiting for events from udev, press ENTER to exit\n");
220 fdcount
= epoll_wait(fd_ep
, ev
, ELEMENTSOF(ev
), -1);
221 printf("epoll fd count: %i\n", fdcount
);
223 for (i
= 0; i
< fdcount
; i
++) {
224 if (ev
[i
].data
.fd
== fd_udev
&& ev
[i
].events
& EPOLLIN
) {
225 device
= udev_monitor_receive_device(udev_monitor
);
226 if (device
== NULL
) {
227 printf("no device from socket\n");
230 print_device(device
);
231 udev_device_unref(device
);
232 } else if (ev
[i
].data
.fd
== STDIN_FILENO
&& ev
[i
].events
& EPOLLIN
) {
233 printf("exiting loop\n");
240 static void test_queue(struct udev
*udev
) {
241 struct udev_queue
*udev_queue
;
244 udev_queue
= udev_queue_new(udev
);
245 assert_se(udev_queue
);
247 empty
= udev_queue_get_queue_is_empty(udev_queue
);
248 log_info("queue is %s", empty
? "empty" : "not empty");
249 udev_queue_unref(udev_queue
);
252 static int test_enumerate(struct udev
*udev
, const char *subsystem
) {
253 struct udev_enumerate
*udev_enumerate
;
256 log_info("enumerate '%s'", subsystem
== NULL
? "<all>" : subsystem
);
257 udev_enumerate
= udev_enumerate_new(udev
);
258 if (udev_enumerate
== NULL
)
260 udev_enumerate_add_match_subsystem(udev_enumerate
, subsystem
);
261 udev_enumerate_scan_devices(udev_enumerate
);
262 test_enumerate_print_list(udev_enumerate
);
263 udev_enumerate_unref(udev_enumerate
);
265 log_info("enumerate 'net' + duplicated scan + null + zero");
266 udev_enumerate
= udev_enumerate_new(udev
);
267 if (udev_enumerate
== NULL
)
269 udev_enumerate_add_match_subsystem(udev_enumerate
, "net");
270 udev_enumerate_scan_devices(udev_enumerate
);
271 udev_enumerate_scan_devices(udev_enumerate
);
272 udev_enumerate_add_syspath(udev_enumerate
, "/sys/class/mem/zero");
273 udev_enumerate_add_syspath(udev_enumerate
, "/sys/class/mem/null");
274 udev_enumerate_add_syspath(udev_enumerate
, "/sys/class/mem/zero");
275 udev_enumerate_add_syspath(udev_enumerate
, "/sys/class/mem/null");
276 udev_enumerate_add_syspath(udev_enumerate
, "/sys/class/mem/zero");
277 udev_enumerate_add_syspath(udev_enumerate
, "/sys/class/mem/null");
278 udev_enumerate_add_syspath(udev_enumerate
, "/sys/class/mem/null");
279 udev_enumerate_add_syspath(udev_enumerate
, "/sys/class/mem/zero");
280 udev_enumerate_add_syspath(udev_enumerate
, "/sys/class/mem/zero");
281 udev_enumerate_scan_devices(udev_enumerate
);
282 test_enumerate_print_list(udev_enumerate
);
283 udev_enumerate_unref(udev_enumerate
);
285 log_info("enumerate 'block'");
286 udev_enumerate
= udev_enumerate_new(udev
);
287 if (udev_enumerate
== NULL
)
289 udev_enumerate_add_match_subsystem(udev_enumerate
,"block");
290 r
= udev_enumerate_add_match_is_initialized(udev_enumerate
);
292 udev_enumerate_unref(udev_enumerate
);
295 udev_enumerate_scan_devices(udev_enumerate
);
296 test_enumerate_print_list(udev_enumerate
);
297 udev_enumerate_unref(udev_enumerate
);
299 log_info("enumerate 'not block'");
300 udev_enumerate
= udev_enumerate_new(udev
);
301 if (udev_enumerate
== NULL
)
303 udev_enumerate_add_nomatch_subsystem(udev_enumerate
, "block");
304 udev_enumerate_scan_devices(udev_enumerate
);
305 test_enumerate_print_list(udev_enumerate
);
306 udev_enumerate_unref(udev_enumerate
);
308 log_info("enumerate 'pci, mem, vc'");
309 udev_enumerate
= udev_enumerate_new(udev
);
310 if (udev_enumerate
== NULL
)
312 udev_enumerate_add_match_subsystem(udev_enumerate
, "pci");
313 udev_enumerate_add_match_subsystem(udev_enumerate
, "mem");
314 udev_enumerate_add_match_subsystem(udev_enumerate
, "vc");
315 udev_enumerate_scan_devices(udev_enumerate
);
316 test_enumerate_print_list(udev_enumerate
);
317 udev_enumerate_unref(udev_enumerate
);
319 log_info("enumerate 'subsystem'");
320 udev_enumerate
= udev_enumerate_new(udev
);
321 if (udev_enumerate
== NULL
)
323 udev_enumerate_scan_subsystems(udev_enumerate
);
324 test_enumerate_print_list(udev_enumerate
);
325 udev_enumerate_unref(udev_enumerate
);
327 log_info("enumerate 'property IF_FS_*=filesystem'");
328 udev_enumerate
= udev_enumerate_new(udev
);
329 if (udev_enumerate
== NULL
)
331 udev_enumerate_add_match_property(udev_enumerate
, "ID_FS*", "filesystem");
332 udev_enumerate_scan_devices(udev_enumerate
);
333 test_enumerate_print_list(udev_enumerate
);
334 udev_enumerate_unref(udev_enumerate
);
338 static void test_hwdb(struct udev
*udev
, const char *modalias
) {
339 struct udev_hwdb
*hwdb
;
340 struct udev_list_entry
*entry
;
342 hwdb
= udev_hwdb_new(udev
);
344 udev_list_entry_foreach(entry
, udev_hwdb_get_properties_list_entry(hwdb
, modalias
, 0))
345 log_info("'%s'='%s'", udev_list_entry_get_name(entry
), udev_list_entry_get_value(entry
));
347 hwdb
= udev_hwdb_unref(hwdb
);
348 assert_se(hwdb
== NULL
);
351 int main(int argc
, char *argv
[]) {
352 _cleanup_udev_unref_
struct udev
*udev
= NULL
;
353 bool arg_monitor
= false;
354 static const struct option options
[] = {
355 { "syspath", required_argument
, NULL
, 'p' },
356 { "subsystem", required_argument
, NULL
, 's' },
357 { "debug", no_argument
, NULL
, 'd' },
358 { "help", no_argument
, NULL
, 'h' },
359 { "version", no_argument
, NULL
, 'V' },
360 { "monitor", no_argument
, NULL
, 'm' },
363 const char *syspath
= "/devices/virtual/mem/null";
364 const char *subsystem
= NULL
;
368 log_info("context: %p", udev
);
370 log_info("no context");
374 while ((c
= getopt_long(argc
, argv
, "p:s:dhV", options
, NULL
)) >= 0)
386 if (log_get_max_level() < LOG_INFO
)
387 log_set_max_level(LOG_INFO
);
391 printf("--debug --syspath= --subsystem= --help\n");
395 printf("%s\n", PACKAGE_VERSION
);
406 assert_not_reached("Unhandled option code.");
410 /* add sys path if needed */
411 if (!startswith(syspath
, "/sys"))
412 syspath
= strjoina("/sys/", syspath
);
414 test_device(udev
, syspath
);
415 test_device_devnum(udev
);
416 test_device_subsys_name(udev
, "block", "sda");
417 test_device_subsys_name(udev
, "subsystem", "pci");
418 test_device_subsys_name(udev
, "drivers", "scsi:sd");
419 test_device_subsys_name(udev
, "module", "printk");
421 test_device_parents(udev
, syspath
);
423 test_enumerate(udev
, subsystem
);
427 test_hwdb(udev
, "usb:v0D50p0011*");