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53e1b683 | 1 | /* SPDX-License-Identifier: LGPL-2.1+ */ |
1298001e KS |
2 | /*** |
3 | This file is part of systemd. | |
4 | ||
5 | Copyright 2008-2012 Kay Sievers <kay@vrfy.org> | |
6 | ||
7 | systemd is free software; you can redistribute it and/or modify it | |
8 | under the terms of the GNU Lesser General Public License as published by | |
9 | the Free Software Foundation; either version 2.1 of the License, or | |
10 | (at your option) any later version. | |
11 | ||
12 | systemd is distributed in the hope that it will be useful, but | |
13 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
15 | Lesser General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU Lesser General Public License | |
18 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
19 | ***/ | |
33a5cc29 | 20 | |
b2d9e4f2 | 21 | #include <getopt.h> |
07630cea | 22 | #include <stdio.h> |
f2fd4d27 | 23 | #include <sys/epoll.h> |
07630cea | 24 | #include <unistd.h> |
ba6929f6 | 25 | |
33a5cc29 | 26 | #include "libudev.h" |
b4bbcaa9 | 27 | |
cc4c1d22 ZJS |
28 | #include "fd-util.h" |
29 | #include "log.h" | |
d054f0a4 | 30 | #include "stdio-util.h" |
07630cea | 31 | #include "string-util.h" |
1ca208fb | 32 | #include "udev-util.h" |
33502ffe | 33 | #include "util.h" |
33a5cc29 | 34 | |
f168c273 | 35 | static void print_device(struct udev_device *device) { |
912541b0 KS |
36 | const char *str; |
37 | dev_t devnum; | |
38 | int count; | |
39 | struct udev_list_entry *list_entry; | |
40 | ||
cc4c1d22 | 41 | log_info("*** device: %p ***", device); |
912541b0 KS |
42 | str = udev_device_get_action(device); |
43 | if (str != NULL) | |
cc4c1d22 | 44 | log_info("action: '%s'", str); |
912541b0 KS |
45 | |
46 | str = udev_device_get_syspath(device); | |
cc4c1d22 | 47 | log_info("syspath: '%s'", str); |
912541b0 KS |
48 | |
49 | str = udev_device_get_sysname(device); | |
cc4c1d22 | 50 | log_info("sysname: '%s'", str); |
912541b0 KS |
51 | |
52 | str = udev_device_get_sysnum(device); | |
53 | if (str != NULL) | |
cc4c1d22 | 54 | log_info("sysnum: '%s'", str); |
912541b0 KS |
55 | |
56 | str = udev_device_get_devpath(device); | |
cc4c1d22 | 57 | log_info("devpath: '%s'", str); |
912541b0 KS |
58 | |
59 | str = udev_device_get_subsystem(device); | |
60 | if (str != NULL) | |
cc4c1d22 | 61 | log_info("subsystem: '%s'", str); |
912541b0 KS |
62 | |
63 | str = udev_device_get_devtype(device); | |
64 | if (str != NULL) | |
cc4c1d22 | 65 | log_info("devtype: '%s'", str); |
912541b0 KS |
66 | |
67 | str = udev_device_get_driver(device); | |
68 | if (str != NULL) | |
cc4c1d22 | 69 | log_info("driver: '%s'", str); |
912541b0 KS |
70 | |
71 | str = udev_device_get_devnode(device); | |
72 | if (str != NULL) | |
cc4c1d22 | 73 | log_info("devname: '%s'", str); |
912541b0 KS |
74 | |
75 | devnum = udev_device_get_devnum(device); | |
76 | if (major(devnum) > 0) | |
cc4c1d22 | 77 | log_info("devnum: %u:%u", major(devnum), minor(devnum)); |
912541b0 KS |
78 | |
79 | count = 0; | |
80 | udev_list_entry_foreach(list_entry, udev_device_get_devlinks_list_entry(device)) { | |
cc4c1d22 | 81 | log_info("link: '%s'", udev_list_entry_get_name(list_entry)); |
912541b0 KS |
82 | count++; |
83 | } | |
84 | if (count > 0) | |
cc4c1d22 | 85 | log_info("found %i links", count); |
912541b0 KS |
86 | |
87 | count = 0; | |
88 | udev_list_entry_foreach(list_entry, udev_device_get_properties_list_entry(device)) { | |
cc4c1d22 | 89 | log_info("property: '%s=%s'", |
912541b0 KS |
90 | udev_list_entry_get_name(list_entry), |
91 | udev_list_entry_get_value(list_entry)); | |
92 | count++; | |
93 | } | |
94 | if (count > 0) | |
cc4c1d22 | 95 | log_info("found %i properties", count); |
912541b0 KS |
96 | |
97 | str = udev_device_get_property_value(device, "MAJOR"); | |
98 | if (str != NULL) | |
cc4c1d22 | 99 | log_info("MAJOR: '%s'", str); |
912541b0 KS |
100 | |
101 | str = udev_device_get_sysattr_value(device, "dev"); | |
102 | if (str != NULL) | |
cc4c1d22 | 103 | log_info("attr{dev}: '%s'", str); |
ba6929f6 KS |
104 | } |
105 | ||
cc4c1d22 | 106 | static void test_device(struct udev *udev, const char *syspath) { |
1ca208fb | 107 | _cleanup_udev_device_unref_ struct udev_device *device; |
912541b0 | 108 | |
cc4c1d22 | 109 | log_info("looking at device: %s", syspath); |
912541b0 | 110 | device = udev_device_new_from_syspath(udev, syspath); |
cc4c1d22 ZJS |
111 | if (device == NULL) |
112 | log_warning_errno(errno, "udev_device_new_from_syspath: %m"); | |
113 | else | |
114 | print_device(device); | |
33a5cc29 KS |
115 | } |
116 | ||
cc4c1d22 | 117 | static void test_device_parents(struct udev *udev, const char *syspath) { |
1ca208fb | 118 | _cleanup_udev_device_unref_ struct udev_device *device; |
912541b0 KS |
119 | struct udev_device *device_parent; |
120 | ||
cc4c1d22 | 121 | log_info("looking at device: %s", syspath); |
912541b0 KS |
122 | device = udev_device_new_from_syspath(udev, syspath); |
123 | if (device == NULL) | |
cc4c1d22 | 124 | return; |
912541b0 | 125 | |
cc4c1d22 | 126 | log_info("looking at parents"); |
912541b0 KS |
127 | device_parent = device; |
128 | do { | |
129 | print_device(device_parent); | |
130 | device_parent = udev_device_get_parent(device_parent); | |
131 | } while (device_parent != NULL); | |
132 | ||
cc4c1d22 | 133 | log_info("looking at parents again"); |
912541b0 KS |
134 | device_parent = device; |
135 | do { | |
136 | print_device(device_parent); | |
137 | device_parent = udev_device_get_parent(device_parent); | |
138 | } while (device_parent != NULL); | |
4ad3a37f KS |
139 | } |
140 | ||
cc4c1d22 | 141 | static void test_device_devnum(struct udev *udev) { |
912541b0 | 142 | dev_t devnum = makedev(1, 3); |
cc4c1d22 | 143 | _cleanup_udev_device_unref_ struct udev_device *device; |
912541b0 | 144 | |
cc4c1d22 | 145 | log_info("looking up device: %u:%u", major(devnum), minor(devnum)); |
912541b0 KS |
146 | device = udev_device_new_from_devnum(udev, 'c', devnum); |
147 | if (device == NULL) | |
cc4c1d22 ZJS |
148 | log_warning_errno(errno, "udev_device_new_from_devnum: %m"); |
149 | else | |
150 | print_device(device); | |
4c9dff47 KS |
151 | } |
152 | ||
cc4c1d22 ZJS |
153 | static void test_device_subsys_name(struct udev *udev, const char *subsys, const char *dev) { |
154 | _cleanup_udev_device_unref_ struct udev_device *device; | |
912541b0 | 155 | |
cc4c1d22 ZJS |
156 | log_info("looking up device: '%s:%s'", subsys, dev); |
157 | device = udev_device_new_from_subsystem_sysname(udev, subsys, dev); | |
912541b0 | 158 | if (device == NULL) |
cc4c1d22 ZJS |
159 | log_warning_errno(errno, "udev_device_new_from_subsystem_sysname: %m"); |
160 | else | |
161 | print_device(device); | |
90d80c2e KS |
162 | } |
163 | ||
f168c273 | 164 | static int test_enumerate_print_list(struct udev_enumerate *enumerate) { |
912541b0 KS |
165 | struct udev_list_entry *list_entry; |
166 | int count = 0; | |
167 | ||
168 | udev_list_entry_foreach(list_entry, udev_enumerate_get_list_entry(enumerate)) { | |
169 | struct udev_device *device; | |
170 | ||
171 | device = udev_device_new_from_syspath(udev_enumerate_get_udev(enumerate), | |
172 | udev_list_entry_get_name(list_entry)); | |
173 | if (device != NULL) { | |
cc4c1d22 ZJS |
174 | log_info("device: '%s' (%s)", |
175 | udev_device_get_syspath(device), | |
176 | udev_device_get_subsystem(device)); | |
912541b0 KS |
177 | udev_device_unref(device); |
178 | count++; | |
179 | } | |
180 | } | |
cc4c1d22 | 181 | log_info("found %i devices", count); |
912541b0 | 182 | return count; |
ba6929f6 KS |
183 | } |
184 | ||
cc4c1d22 ZJS |
185 | static void test_monitor(struct udev *udev) { |
186 | _cleanup_udev_monitor_unref_ struct udev_monitor *udev_monitor; | |
187 | _cleanup_close_ int fd_ep; | |
188 | int fd_udev; | |
189 | struct epoll_event ep_udev = { | |
190 | .events = EPOLLIN, | |
191 | }, ep_stdin = { | |
192 | .events = EPOLLIN, | |
193 | .data.fd = STDIN_FILENO, | |
194 | }; | |
912541b0 KS |
195 | |
196 | fd_ep = epoll_create1(EPOLL_CLOEXEC); | |
cc4c1d22 | 197 | assert_se(fd_ep >= 0); |
912541b0 KS |
198 | |
199 | udev_monitor = udev_monitor_new_from_netlink(udev, "udev"); | |
cc4c1d22 | 200 | assert_se(udev_monitor != NULL); |
912541b0 | 201 | |
cc4c1d22 ZJS |
202 | fd_udev = udev_monitor_get_fd(udev_monitor); |
203 | ep_udev.data.fd = fd_udev; | |
912541b0 | 204 | |
cc4c1d22 ZJS |
205 | assert_se(udev_monitor_filter_add_match_subsystem_devtype(udev_monitor, "block", NULL) >= 0); |
206 | assert_se(udev_monitor_filter_add_match_subsystem_devtype(udev_monitor, "tty", NULL) >= 0); | |
207 | assert_se(udev_monitor_filter_add_match_subsystem_devtype(udev_monitor, "usb", "usb_device") >= 0); | |
912541b0 | 208 | |
cc4c1d22 | 209 | assert_se(udev_monitor_enable_receiving(udev_monitor) >= 0); |
912541b0 | 210 | |
cc4c1d22 ZJS |
211 | assert_se(epoll_ctl(fd_ep, EPOLL_CTL_ADD, fd_udev, &ep_udev) >= 0); |
212 | assert_se(epoll_ctl(fd_ep, EPOLL_CTL_ADD, STDIN_FILENO, &ep_stdin) >= 0); | |
912541b0 KS |
213 | |
214 | for (;;) { | |
215 | int fdcount; | |
216 | struct epoll_event ev[4]; | |
217 | struct udev_device *device; | |
218 | int i; | |
219 | ||
220 | printf("waiting for events from udev, press ENTER to exit\n"); | |
cc4c1d22 | 221 | fdcount = epoll_wait(fd_ep, ev, ELEMENTSOF(ev), -1); |
912541b0 KS |
222 | printf("epoll fd count: %i\n", fdcount); |
223 | ||
224 | for (i = 0; i < fdcount; i++) { | |
225 | if (ev[i].data.fd == fd_udev && ev[i].events & EPOLLIN) { | |
226 | device = udev_monitor_receive_device(udev_monitor); | |
227 | if (device == NULL) { | |
228 | printf("no device from socket\n"); | |
229 | continue; | |
230 | } | |
231 | print_device(device); | |
232 | udev_device_unref(device); | |
233 | } else if (ev[i].data.fd == STDIN_FILENO && ev[i].events & EPOLLIN) { | |
234 | printf("exiting loop\n"); | |
cc4c1d22 | 235 | return; |
912541b0 KS |
236 | } |
237 | } | |
238 | } | |
33a5cc29 KS |
239 | } |
240 | ||
cc4c1d22 | 241 | static void test_queue(struct udev *udev) { |
912541b0 | 242 | struct udev_queue *udev_queue; |
cc4c1d22 | 243 | bool empty; |
912541b0 KS |
244 | |
245 | udev_queue = udev_queue_new(udev); | |
cc4c1d22 | 246 | assert_se(udev_queue); |
912541b0 | 247 | |
cc4c1d22 ZJS |
248 | empty = udev_queue_get_queue_is_empty(udev_queue); |
249 | log_info("queue is %s", empty ? "empty" : "not empty"); | |
912541b0 | 250 | udev_queue_unref(udev_queue); |
64ccdf82 KS |
251 | } |
252 | ||
f168c273 | 253 | static int test_enumerate(struct udev *udev, const char *subsystem) { |
912541b0 | 254 | struct udev_enumerate *udev_enumerate; |
c0c6a4fc | 255 | int r; |
912541b0 | 256 | |
cc4c1d22 | 257 | log_info("enumerate '%s'", subsystem == NULL ? "<all>" : subsystem); |
912541b0 KS |
258 | udev_enumerate = udev_enumerate_new(udev); |
259 | if (udev_enumerate == NULL) | |
260 | return -1; | |
261 | udev_enumerate_add_match_subsystem(udev_enumerate, subsystem); | |
262 | udev_enumerate_scan_devices(udev_enumerate); | |
263 | test_enumerate_print_list(udev_enumerate); | |
264 | udev_enumerate_unref(udev_enumerate); | |
265 | ||
cc4c1d22 | 266 | log_info("enumerate 'net' + duplicated scan + null + zero"); |
912541b0 KS |
267 | udev_enumerate = udev_enumerate_new(udev); |
268 | if (udev_enumerate == NULL) | |
269 | return -1; | |
270 | udev_enumerate_add_match_subsystem(udev_enumerate, "net"); | |
271 | udev_enumerate_scan_devices(udev_enumerate); | |
272 | udev_enumerate_scan_devices(udev_enumerate); | |
273 | udev_enumerate_add_syspath(udev_enumerate, "/sys/class/mem/zero"); | |
274 | udev_enumerate_add_syspath(udev_enumerate, "/sys/class/mem/null"); | |
275 | udev_enumerate_add_syspath(udev_enumerate, "/sys/class/mem/zero"); | |
276 | udev_enumerate_add_syspath(udev_enumerate, "/sys/class/mem/null"); | |
277 | udev_enumerate_add_syspath(udev_enumerate, "/sys/class/mem/zero"); | |
278 | udev_enumerate_add_syspath(udev_enumerate, "/sys/class/mem/null"); | |
279 | udev_enumerate_add_syspath(udev_enumerate, "/sys/class/mem/null"); | |
280 | udev_enumerate_add_syspath(udev_enumerate, "/sys/class/mem/zero"); | |
281 | udev_enumerate_add_syspath(udev_enumerate, "/sys/class/mem/zero"); | |
282 | udev_enumerate_scan_devices(udev_enumerate); | |
283 | test_enumerate_print_list(udev_enumerate); | |
284 | udev_enumerate_unref(udev_enumerate); | |
285 | ||
cc4c1d22 | 286 | log_info("enumerate 'block'"); |
912541b0 KS |
287 | udev_enumerate = udev_enumerate_new(udev); |
288 | if (udev_enumerate == NULL) | |
289 | return -1; | |
290 | udev_enumerate_add_match_subsystem(udev_enumerate,"block"); | |
c0c6a4fc | 291 | r = udev_enumerate_add_match_is_initialized(udev_enumerate); |
86ff9f11 TA |
292 | if (r < 0) { |
293 | udev_enumerate_unref(udev_enumerate); | |
c0c6a4fc | 294 | return r; |
86ff9f11 | 295 | } |
912541b0 KS |
296 | udev_enumerate_scan_devices(udev_enumerate); |
297 | test_enumerate_print_list(udev_enumerate); | |
298 | udev_enumerate_unref(udev_enumerate); | |
299 | ||
cc4c1d22 | 300 | log_info("enumerate 'not block'"); |
912541b0 KS |
301 | udev_enumerate = udev_enumerate_new(udev); |
302 | if (udev_enumerate == NULL) | |
303 | return -1; | |
304 | udev_enumerate_add_nomatch_subsystem(udev_enumerate, "block"); | |
305 | udev_enumerate_scan_devices(udev_enumerate); | |
306 | test_enumerate_print_list(udev_enumerate); | |
307 | udev_enumerate_unref(udev_enumerate); | |
308 | ||
cc4c1d22 | 309 | log_info("enumerate 'pci, mem, vc'"); |
912541b0 KS |
310 | udev_enumerate = udev_enumerate_new(udev); |
311 | if (udev_enumerate == NULL) | |
312 | return -1; | |
313 | udev_enumerate_add_match_subsystem(udev_enumerate, "pci"); | |
314 | udev_enumerate_add_match_subsystem(udev_enumerate, "mem"); | |
315 | udev_enumerate_add_match_subsystem(udev_enumerate, "vc"); | |
316 | udev_enumerate_scan_devices(udev_enumerate); | |
317 | test_enumerate_print_list(udev_enumerate); | |
318 | udev_enumerate_unref(udev_enumerate); | |
319 | ||
cc4c1d22 | 320 | log_info("enumerate 'subsystem'"); |
912541b0 KS |
321 | udev_enumerate = udev_enumerate_new(udev); |
322 | if (udev_enumerate == NULL) | |
323 | return -1; | |
324 | udev_enumerate_scan_subsystems(udev_enumerate); | |
325 | test_enumerate_print_list(udev_enumerate); | |
326 | udev_enumerate_unref(udev_enumerate); | |
327 | ||
cc4c1d22 | 328 | log_info("enumerate 'property IF_FS_*=filesystem'"); |
912541b0 KS |
329 | udev_enumerate = udev_enumerate_new(udev); |
330 | if (udev_enumerate == NULL) | |
331 | return -1; | |
332 | udev_enumerate_add_match_property(udev_enumerate, "ID_FS*", "filesystem"); | |
333 | udev_enumerate_scan_devices(udev_enumerate); | |
334 | test_enumerate_print_list(udev_enumerate); | |
335 | udev_enumerate_unref(udev_enumerate); | |
336 | return 0; | |
90d80c2e KS |
337 | } |
338 | ||
872c8faa | 339 | static void test_hwdb(struct udev *udev, const char *modalias) { |
960787ae | 340 | struct udev_hwdb *hwdb; |
2001208c KS |
341 | struct udev_list_entry *entry; |
342 | ||
343 | hwdb = udev_hwdb_new(udev); | |
344 | ||
345 | udev_list_entry_foreach(entry, udev_hwdb_get_properties_list_entry(hwdb, modalias, 0)) | |
cc4c1d22 | 346 | log_info("'%s'='%s'", udev_list_entry_get_name(entry), udev_list_entry_get_value(entry)); |
2001208c KS |
347 | |
348 | hwdb = udev_hwdb_unref(hwdb); | |
bdf7026e | 349 | assert_se(hwdb == NULL); |
2001208c KS |
350 | } |
351 | ||
f168c273 | 352 | int main(int argc, char *argv[]) { |
cc4c1d22 | 353 | _cleanup_udev_unref_ struct udev *udev = NULL; |
301a9c67 | 354 | bool arg_monitor = false; |
912541b0 | 355 | static const struct option options[] = { |
cc4c1d22 | 356 | { "syspath", required_argument, NULL, 'p' }, |
912541b0 | 357 | { "subsystem", required_argument, NULL, 's' }, |
cc4c1d22 ZJS |
358 | { "debug", no_argument, NULL, 'd' }, |
359 | { "help", no_argument, NULL, 'h' }, | |
360 | { "version", no_argument, NULL, 'V' }, | |
301a9c67 | 361 | { "monitor", no_argument, NULL, 'm' }, |
912541b0 KS |
362 | {} |
363 | }; | |
364 | const char *syspath = "/devices/virtual/mem/null"; | |
365 | const char *subsystem = NULL; | |
601185b4 | 366 | int c; |
912541b0 KS |
367 | |
368 | udev = udev_new(); | |
cc4c1d22 | 369 | log_info("context: %p", udev); |
912541b0 | 370 | if (udev == NULL) { |
cc4c1d22 | 371 | log_info("no context"); |
912541b0 KS |
372 | return 1; |
373 | } | |
912541b0 | 374 | |
601185b4 ZJS |
375 | while ((c = getopt_long(argc, argv, "p:s:dhV", options, NULL)) >= 0) |
376 | switch (c) { | |
912541b0 | 377 | |
912541b0 KS |
378 | case 'p': |
379 | syspath = optarg; | |
380 | break; | |
601185b4 | 381 | |
912541b0 KS |
382 | case 's': |
383 | subsystem = optarg; | |
384 | break; | |
601185b4 | 385 | |
912541b0 | 386 | case 'd': |
25e773ee KS |
387 | if (log_get_max_level() < LOG_INFO) |
388 | log_set_max_level(LOG_INFO); | |
912541b0 | 389 | break; |
601185b4 | 390 | |
912541b0 KS |
391 | case 'h': |
392 | printf("--debug --syspath= --subsystem= --help\n"); | |
cc4c1d22 | 393 | return EXIT_SUCCESS; |
601185b4 | 394 | |
912541b0 | 395 | case 'V': |
948aaa7c | 396 | printf("%s\n", PACKAGE_VERSION); |
cc4c1d22 | 397 | return EXIT_SUCCESS; |
601185b4 | 398 | |
301a9c67 ZJS |
399 | case 'm': |
400 | arg_monitor = true; | |
401 | break; | |
402 | ||
601185b4 | 403 | case '?': |
cc4c1d22 | 404 | return EXIT_FAILURE; |
601185b4 ZJS |
405 | |
406 | default: | |
407 | assert_not_reached("Unhandled option code."); | |
912541b0 | 408 | } |
601185b4 | 409 | |
912541b0 | 410 | |
912541b0 | 411 | /* add sys path if needed */ |
cc4c1d22 ZJS |
412 | if (!startswith(syspath, "/sys")) |
413 | syspath = strjoina("/sys/", syspath); | |
912541b0 KS |
414 | |
415 | test_device(udev, syspath); | |
416 | test_device_devnum(udev); | |
cc4c1d22 ZJS |
417 | test_device_subsys_name(udev, "block", "sda"); |
418 | test_device_subsys_name(udev, "subsystem", "pci"); | |
419 | test_device_subsys_name(udev, "drivers", "scsi:sd"); | |
420 | test_device_subsys_name(udev, "module", "printk"); | |
421 | ||
912541b0 KS |
422 | test_device_parents(udev, syspath); |
423 | ||
424 | test_enumerate(udev, subsystem); | |
425 | ||
426 | test_queue(udev); | |
427 | ||
2001208c KS |
428 | test_hwdb(udev, "usb:v0D50p0011*"); |
429 | ||
301a9c67 ZJS |
430 | if (arg_monitor) |
431 | test_monitor(udev); | |
cc4c1d22 ZJS |
432 | |
433 | return EXIT_SUCCESS; | |
33a5cc29 | 434 | } |