]>
git.ipfire.org Git - thirdparty/systemd.git/blob - src/test/test-libudev.c
1 /* SPDX-License-Identifier: LGPL-2.1+ */
3 This file is part of systemd.
5 Copyright 2008-2012 Kay Sievers <kay@vrfy.org>
10 #include <sys/epoll.h>
17 #include "stdio-util.h"
18 #include "string-util.h"
19 #include "udev-util.h"
22 static void print_device(struct udev_device
*device
) {
26 struct udev_list_entry
*list_entry
;
28 log_info("*** device: %p ***", device
);
29 str
= udev_device_get_action(device
);
31 log_info("action: '%s'", str
);
33 str
= udev_device_get_syspath(device
);
34 log_info("syspath: '%s'", str
);
36 str
= udev_device_get_sysname(device
);
37 log_info("sysname: '%s'", str
);
39 str
= udev_device_get_sysnum(device
);
41 log_info("sysnum: '%s'", str
);
43 str
= udev_device_get_devpath(device
);
44 log_info("devpath: '%s'", str
);
46 str
= udev_device_get_subsystem(device
);
48 log_info("subsystem: '%s'", str
);
50 str
= udev_device_get_devtype(device
);
52 log_info("devtype: '%s'", str
);
54 str
= udev_device_get_driver(device
);
56 log_info("driver: '%s'", str
);
58 str
= udev_device_get_devnode(device
);
60 log_info("devname: '%s'", str
);
62 devnum
= udev_device_get_devnum(device
);
63 if (major(devnum
) > 0)
64 log_info("devnum: %u:%u", major(devnum
), minor(devnum
));
67 udev_list_entry_foreach(list_entry
, udev_device_get_devlinks_list_entry(device
)) {
68 log_info("link: '%s'", udev_list_entry_get_name(list_entry
));
72 log_info("found %i links", count
);
75 udev_list_entry_foreach(list_entry
, udev_device_get_properties_list_entry(device
)) {
76 log_info("property: '%s=%s'",
77 udev_list_entry_get_name(list_entry
),
78 udev_list_entry_get_value(list_entry
));
82 log_info("found %i properties", count
);
84 str
= udev_device_get_property_value(device
, "MAJOR");
86 log_info("MAJOR: '%s'", str
);
88 str
= udev_device_get_sysattr_value(device
, "dev");
90 log_info("attr{dev}: '%s'", str
);
93 static void test_device(struct udev
*udev
, const char *syspath
) {
94 _cleanup_(udev_device_unrefp
) struct udev_device
*device
;
96 log_info("looking at device: %s", syspath
);
97 device
= udev_device_new_from_syspath(udev
, syspath
);
99 log_warning_errno(errno
, "udev_device_new_from_syspath: %m");
101 print_device(device
);
104 static void test_device_parents(struct udev
*udev
, const char *syspath
) {
105 _cleanup_(udev_device_unrefp
) struct udev_device
*device
;
106 struct udev_device
*device_parent
;
108 log_info("looking at device: %s", syspath
);
109 device
= udev_device_new_from_syspath(udev
, syspath
);
113 log_info("looking at parents");
114 device_parent
= device
;
116 print_device(device_parent
);
117 device_parent
= udev_device_get_parent(device_parent
);
118 } while (device_parent
!= NULL
);
120 log_info("looking at parents again");
121 device_parent
= device
;
123 print_device(device_parent
);
124 device_parent
= udev_device_get_parent(device_parent
);
125 } while (device_parent
!= NULL
);
128 static void test_device_devnum(struct udev
*udev
) {
129 dev_t devnum
= makedev(1, 3);
130 _cleanup_(udev_device_unrefp
) struct udev_device
*device
;
132 log_info("looking up device: %u:%u", major(devnum
), minor(devnum
));
133 device
= udev_device_new_from_devnum(udev
, 'c', devnum
);
135 log_warning_errno(errno
, "udev_device_new_from_devnum: %m");
137 print_device(device
);
140 static void test_device_subsys_name(struct udev
*udev
, const char *subsys
, const char *dev
) {
141 _cleanup_(udev_device_unrefp
) struct udev_device
*device
;
143 log_info("looking up device: '%s:%s'", subsys
, dev
);
144 device
= udev_device_new_from_subsystem_sysname(udev
, subsys
, dev
);
146 log_warning_errno(errno
, "udev_device_new_from_subsystem_sysname: %m");
148 print_device(device
);
151 static int test_enumerate_print_list(struct udev_enumerate
*enumerate
) {
152 struct udev_list_entry
*list_entry
;
155 udev_list_entry_foreach(list_entry
, udev_enumerate_get_list_entry(enumerate
)) {
156 struct udev_device
*device
;
158 device
= udev_device_new_from_syspath(udev_enumerate_get_udev(enumerate
),
159 udev_list_entry_get_name(list_entry
));
160 if (device
!= NULL
) {
161 log_info("device: '%s' (%s)",
162 udev_device_get_syspath(device
),
163 udev_device_get_subsystem(device
));
164 udev_device_unref(device
);
168 log_info("found %i devices", count
);
172 static void test_monitor(struct udev
*udev
) {
173 _cleanup_(udev_monitor_unrefp
) struct udev_monitor
*udev_monitor
;
174 _cleanup_close_
int fd_ep
;
176 struct epoll_event ep_udev
= {
180 .data
.fd
= STDIN_FILENO
,
183 fd_ep
= epoll_create1(EPOLL_CLOEXEC
);
184 assert_se(fd_ep
>= 0);
186 udev_monitor
= udev_monitor_new_from_netlink(udev
, "udev");
187 assert_se(udev_monitor
!= NULL
);
189 fd_udev
= udev_monitor_get_fd(udev_monitor
);
190 ep_udev
.data
.fd
= fd_udev
;
192 assert_se(udev_monitor_filter_add_match_subsystem_devtype(udev_monitor
, "block", NULL
) >= 0);
193 assert_se(udev_monitor_filter_add_match_subsystem_devtype(udev_monitor
, "tty", NULL
) >= 0);
194 assert_se(udev_monitor_filter_add_match_subsystem_devtype(udev_monitor
, "usb", "usb_device") >= 0);
196 assert_se(udev_monitor_enable_receiving(udev_monitor
) >= 0);
198 assert_se(epoll_ctl(fd_ep
, EPOLL_CTL_ADD
, fd_udev
, &ep_udev
) >= 0);
199 assert_se(epoll_ctl(fd_ep
, EPOLL_CTL_ADD
, STDIN_FILENO
, &ep_stdin
) >= 0);
203 struct epoll_event ev
[4];
204 struct udev_device
*device
;
207 printf("waiting for events from udev, press ENTER to exit\n");
208 fdcount
= epoll_wait(fd_ep
, ev
, ELEMENTSOF(ev
), -1);
209 printf("epoll fd count: %i\n", fdcount
);
211 for (i
= 0; i
< fdcount
; i
++) {
212 if (ev
[i
].data
.fd
== fd_udev
&& ev
[i
].events
& EPOLLIN
) {
213 device
= udev_monitor_receive_device(udev_monitor
);
214 if (device
== NULL
) {
215 printf("no device from socket\n");
218 print_device(device
);
219 udev_device_unref(device
);
220 } else if (ev
[i
].data
.fd
== STDIN_FILENO
&& ev
[i
].events
& EPOLLIN
) {
221 printf("exiting loop\n");
228 static void test_queue(struct udev
*udev
) {
229 struct udev_queue
*udev_queue
;
232 udev_queue
= udev_queue_new(udev
);
233 assert_se(udev_queue
);
235 empty
= udev_queue_get_queue_is_empty(udev_queue
);
236 log_info("queue is %s", empty
? "empty" : "not empty");
237 udev_queue_unref(udev_queue
);
240 static int test_enumerate(struct udev
*udev
, const char *subsystem
) {
241 struct udev_enumerate
*udev_enumerate
;
244 log_info("enumerate '%s'", subsystem
== NULL
? "<all>" : subsystem
);
245 udev_enumerate
= udev_enumerate_new(udev
);
246 if (udev_enumerate
== NULL
)
248 udev_enumerate_add_match_subsystem(udev_enumerate
, subsystem
);
249 udev_enumerate_scan_devices(udev_enumerate
);
250 test_enumerate_print_list(udev_enumerate
);
251 udev_enumerate_unref(udev_enumerate
);
253 log_info("enumerate 'net' + duplicated scan + null + zero");
254 udev_enumerate
= udev_enumerate_new(udev
);
255 if (udev_enumerate
== NULL
)
257 udev_enumerate_add_match_subsystem(udev_enumerate
, "net");
258 udev_enumerate_scan_devices(udev_enumerate
);
259 udev_enumerate_scan_devices(udev_enumerate
);
260 udev_enumerate_add_syspath(udev_enumerate
, "/sys/class/mem/zero");
261 udev_enumerate_add_syspath(udev_enumerate
, "/sys/class/mem/null");
262 udev_enumerate_add_syspath(udev_enumerate
, "/sys/class/mem/zero");
263 udev_enumerate_add_syspath(udev_enumerate
, "/sys/class/mem/null");
264 udev_enumerate_add_syspath(udev_enumerate
, "/sys/class/mem/zero");
265 udev_enumerate_add_syspath(udev_enumerate
, "/sys/class/mem/null");
266 udev_enumerate_add_syspath(udev_enumerate
, "/sys/class/mem/null");
267 udev_enumerate_add_syspath(udev_enumerate
, "/sys/class/mem/zero");
268 udev_enumerate_add_syspath(udev_enumerate
, "/sys/class/mem/zero");
269 udev_enumerate_scan_devices(udev_enumerate
);
270 test_enumerate_print_list(udev_enumerate
);
271 udev_enumerate_unref(udev_enumerate
);
273 log_info("enumerate 'block'");
274 udev_enumerate
= udev_enumerate_new(udev
);
275 if (udev_enumerate
== NULL
)
277 udev_enumerate_add_match_subsystem(udev_enumerate
,"block");
278 r
= udev_enumerate_add_match_is_initialized(udev_enumerate
);
280 udev_enumerate_unref(udev_enumerate
);
283 udev_enumerate_scan_devices(udev_enumerate
);
284 test_enumerate_print_list(udev_enumerate
);
285 udev_enumerate_unref(udev_enumerate
);
287 log_info("enumerate 'not block'");
288 udev_enumerate
= udev_enumerate_new(udev
);
289 if (udev_enumerate
== NULL
)
291 udev_enumerate_add_nomatch_subsystem(udev_enumerate
, "block");
292 udev_enumerate_scan_devices(udev_enumerate
);
293 test_enumerate_print_list(udev_enumerate
);
294 udev_enumerate_unref(udev_enumerate
);
296 log_info("enumerate 'pci, mem, vc'");
297 udev_enumerate
= udev_enumerate_new(udev
);
298 if (udev_enumerate
== NULL
)
300 udev_enumerate_add_match_subsystem(udev_enumerate
, "pci");
301 udev_enumerate_add_match_subsystem(udev_enumerate
, "mem");
302 udev_enumerate_add_match_subsystem(udev_enumerate
, "vc");
303 udev_enumerate_scan_devices(udev_enumerate
);
304 test_enumerate_print_list(udev_enumerate
);
305 udev_enumerate_unref(udev_enumerate
);
307 log_info("enumerate 'subsystem'");
308 udev_enumerate
= udev_enumerate_new(udev
);
309 if (udev_enumerate
== NULL
)
311 udev_enumerate_scan_subsystems(udev_enumerate
);
312 test_enumerate_print_list(udev_enumerate
);
313 udev_enumerate_unref(udev_enumerate
);
315 log_info("enumerate 'property IF_FS_*=filesystem'");
316 udev_enumerate
= udev_enumerate_new(udev
);
317 if (udev_enumerate
== NULL
)
319 udev_enumerate_add_match_property(udev_enumerate
, "ID_FS*", "filesystem");
320 udev_enumerate_scan_devices(udev_enumerate
);
321 test_enumerate_print_list(udev_enumerate
);
322 udev_enumerate_unref(udev_enumerate
);
326 static void test_hwdb(struct udev
*udev
, const char *modalias
) {
327 struct udev_hwdb
*hwdb
;
328 struct udev_list_entry
*entry
;
330 hwdb
= udev_hwdb_new(udev
);
332 udev_list_entry_foreach(entry
, udev_hwdb_get_properties_list_entry(hwdb
, modalias
, 0))
333 log_info("'%s'='%s'", udev_list_entry_get_name(entry
), udev_list_entry_get_value(entry
));
335 hwdb
= udev_hwdb_unref(hwdb
);
336 assert_se(hwdb
== NULL
);
339 int main(int argc
, char *argv
[]) {
340 _cleanup_(udev_unrefp
) struct udev
*udev
= NULL
;
341 bool arg_monitor
= false;
342 static const struct option options
[] = {
343 { "syspath", required_argument
, NULL
, 'p' },
344 { "subsystem", required_argument
, NULL
, 's' },
345 { "debug", no_argument
, NULL
, 'd' },
346 { "help", no_argument
, NULL
, 'h' },
347 { "version", no_argument
, NULL
, 'V' },
348 { "monitor", no_argument
, NULL
, 'm' },
351 const char *syspath
= "/devices/virtual/mem/null";
352 const char *subsystem
= NULL
;
356 log_info("context: %p", udev
);
358 log_info("no context");
362 while ((c
= getopt_long(argc
, argv
, "p:s:dhVm", options
, NULL
)) >= 0)
374 if (log_get_max_level() < LOG_INFO
)
375 log_set_max_level(LOG_INFO
);
379 printf("--debug --syspath= --subsystem= --help\n");
383 printf("%s\n", PACKAGE_VERSION
);
394 assert_not_reached("Unhandled option code.");
397 /* add sys path if needed */
398 if (!startswith(syspath
, "/sys"))
399 syspath
= strjoina("/sys/", syspath
);
401 test_device(udev
, syspath
);
402 test_device_devnum(udev
);
403 test_device_subsys_name(udev
, "block", "sda");
404 test_device_subsys_name(udev
, "subsystem", "pci");
405 test_device_subsys_name(udev
, "drivers", "scsi:sd");
406 test_device_subsys_name(udev
, "module", "printk");
408 test_device_parents(udev
, syspath
);
410 test_enumerate(udev
, subsystem
);
414 test_hwdb(udev
, "usb:v0D50p0011*");