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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> | |
1298001e | 6 | ***/ |
33a5cc29 | 7 | |
b2d9e4f2 | 8 | #include <getopt.h> |
07630cea | 9 | #include <stdio.h> |
f2fd4d27 | 10 | #include <sys/epoll.h> |
07630cea | 11 | #include <unistd.h> |
ba6929f6 | 12 | |
33a5cc29 | 13 | #include "libudev.h" |
b4bbcaa9 | 14 | |
cc4c1d22 ZJS |
15 | #include "fd-util.h" |
16 | #include "log.h" | |
d054f0a4 | 17 | #include "stdio-util.h" |
07630cea | 18 | #include "string-util.h" |
1ca208fb | 19 | #include "udev-util.h" |
33502ffe | 20 | #include "util.h" |
33a5cc29 | 21 | |
f168c273 | 22 | static void print_device(struct udev_device *device) { |
912541b0 KS |
23 | const char *str; |
24 | dev_t devnum; | |
25 | int count; | |
26 | struct udev_list_entry *list_entry; | |
27 | ||
cc4c1d22 | 28 | log_info("*** device: %p ***", device); |
912541b0 KS |
29 | str = udev_device_get_action(device); |
30 | if (str != NULL) | |
cc4c1d22 | 31 | log_info("action: '%s'", str); |
912541b0 KS |
32 | |
33 | str = udev_device_get_syspath(device); | |
cc4c1d22 | 34 | log_info("syspath: '%s'", str); |
912541b0 KS |
35 | |
36 | str = udev_device_get_sysname(device); | |
cc4c1d22 | 37 | log_info("sysname: '%s'", str); |
912541b0 KS |
38 | |
39 | str = udev_device_get_sysnum(device); | |
40 | if (str != NULL) | |
cc4c1d22 | 41 | log_info("sysnum: '%s'", str); |
912541b0 KS |
42 | |
43 | str = udev_device_get_devpath(device); | |
cc4c1d22 | 44 | log_info("devpath: '%s'", str); |
912541b0 KS |
45 | |
46 | str = udev_device_get_subsystem(device); | |
47 | if (str != NULL) | |
cc4c1d22 | 48 | log_info("subsystem: '%s'", str); |
912541b0 KS |
49 | |
50 | str = udev_device_get_devtype(device); | |
51 | if (str != NULL) | |
cc4c1d22 | 52 | log_info("devtype: '%s'", str); |
912541b0 KS |
53 | |
54 | str = udev_device_get_driver(device); | |
55 | if (str != NULL) | |
cc4c1d22 | 56 | log_info("driver: '%s'", str); |
912541b0 KS |
57 | |
58 | str = udev_device_get_devnode(device); | |
59 | if (str != NULL) | |
cc4c1d22 | 60 | log_info("devname: '%s'", str); |
912541b0 KS |
61 | |
62 | devnum = udev_device_get_devnum(device); | |
63 | if (major(devnum) > 0) | |
cc4c1d22 | 64 | log_info("devnum: %u:%u", major(devnum), minor(devnum)); |
912541b0 KS |
65 | |
66 | count = 0; | |
67 | udev_list_entry_foreach(list_entry, udev_device_get_devlinks_list_entry(device)) { | |
cc4c1d22 | 68 | log_info("link: '%s'", udev_list_entry_get_name(list_entry)); |
912541b0 KS |
69 | count++; |
70 | } | |
71 | if (count > 0) | |
cc4c1d22 | 72 | log_info("found %i links", count); |
912541b0 KS |
73 | |
74 | count = 0; | |
75 | udev_list_entry_foreach(list_entry, udev_device_get_properties_list_entry(device)) { | |
cc4c1d22 | 76 | log_info("property: '%s=%s'", |
912541b0 KS |
77 | udev_list_entry_get_name(list_entry), |
78 | udev_list_entry_get_value(list_entry)); | |
79 | count++; | |
80 | } | |
81 | if (count > 0) | |
cc4c1d22 | 82 | log_info("found %i properties", count); |
912541b0 KS |
83 | |
84 | str = udev_device_get_property_value(device, "MAJOR"); | |
85 | if (str != NULL) | |
cc4c1d22 | 86 | log_info("MAJOR: '%s'", str); |
912541b0 KS |
87 | |
88 | str = udev_device_get_sysattr_value(device, "dev"); | |
89 | if (str != NULL) | |
cc4c1d22 | 90 | log_info("attr{dev}: '%s'", str); |
ba6929f6 KS |
91 | } |
92 | ||
cc4c1d22 | 93 | static void test_device(struct udev *udev, const char *syspath) { |
8e766630 | 94 | _cleanup_(udev_device_unrefp) struct udev_device *device; |
912541b0 | 95 | |
cc4c1d22 | 96 | log_info("looking at device: %s", syspath); |
912541b0 | 97 | device = udev_device_new_from_syspath(udev, syspath); |
cc4c1d22 ZJS |
98 | if (device == NULL) |
99 | log_warning_errno(errno, "udev_device_new_from_syspath: %m"); | |
100 | else | |
101 | print_device(device); | |
33a5cc29 KS |
102 | } |
103 | ||
cc4c1d22 | 104 | static void test_device_parents(struct udev *udev, const char *syspath) { |
8e766630 | 105 | _cleanup_(udev_device_unrefp) struct udev_device *device; |
912541b0 KS |
106 | struct udev_device *device_parent; |
107 | ||
cc4c1d22 | 108 | log_info("looking at device: %s", syspath); |
912541b0 KS |
109 | device = udev_device_new_from_syspath(udev, syspath); |
110 | if (device == NULL) | |
cc4c1d22 | 111 | return; |
912541b0 | 112 | |
cc4c1d22 | 113 | log_info("looking at parents"); |
912541b0 KS |
114 | device_parent = device; |
115 | do { | |
116 | print_device(device_parent); | |
117 | device_parent = udev_device_get_parent(device_parent); | |
118 | } while (device_parent != NULL); | |
119 | ||
cc4c1d22 | 120 | log_info("looking at parents again"); |
912541b0 KS |
121 | device_parent = device; |
122 | do { | |
123 | print_device(device_parent); | |
124 | device_parent = udev_device_get_parent(device_parent); | |
125 | } while (device_parent != NULL); | |
4ad3a37f KS |
126 | } |
127 | ||
cc4c1d22 | 128 | static void test_device_devnum(struct udev *udev) { |
912541b0 | 129 | dev_t devnum = makedev(1, 3); |
8e766630 | 130 | _cleanup_(udev_device_unrefp) struct udev_device *device; |
912541b0 | 131 | |
cc4c1d22 | 132 | log_info("looking up device: %u:%u", major(devnum), minor(devnum)); |
912541b0 KS |
133 | device = udev_device_new_from_devnum(udev, 'c', devnum); |
134 | if (device == NULL) | |
cc4c1d22 ZJS |
135 | log_warning_errno(errno, "udev_device_new_from_devnum: %m"); |
136 | else | |
137 | print_device(device); | |
4c9dff47 KS |
138 | } |
139 | ||
cc4c1d22 | 140 | static void test_device_subsys_name(struct udev *udev, const char *subsys, const char *dev) { |
8e766630 | 141 | _cleanup_(udev_device_unrefp) struct udev_device *device; |
912541b0 | 142 | |
cc4c1d22 ZJS |
143 | log_info("looking up device: '%s:%s'", subsys, dev); |
144 | device = udev_device_new_from_subsystem_sysname(udev, subsys, dev); | |
912541b0 | 145 | if (device == NULL) |
cc4c1d22 ZJS |
146 | log_warning_errno(errno, "udev_device_new_from_subsystem_sysname: %m"); |
147 | else | |
148 | print_device(device); | |
90d80c2e KS |
149 | } |
150 | ||
f168c273 | 151 | static int test_enumerate_print_list(struct udev_enumerate *enumerate) { |
912541b0 KS |
152 | struct udev_list_entry *list_entry; |
153 | int count = 0; | |
154 | ||
155 | udev_list_entry_foreach(list_entry, udev_enumerate_get_list_entry(enumerate)) { | |
156 | struct udev_device *device; | |
157 | ||
158 | device = udev_device_new_from_syspath(udev_enumerate_get_udev(enumerate), | |
159 | udev_list_entry_get_name(list_entry)); | |
160 | if (device != NULL) { | |
cc4c1d22 ZJS |
161 | log_info("device: '%s' (%s)", |
162 | udev_device_get_syspath(device), | |
163 | udev_device_get_subsystem(device)); | |
912541b0 KS |
164 | udev_device_unref(device); |
165 | count++; | |
166 | } | |
167 | } | |
cc4c1d22 | 168 | log_info("found %i devices", count); |
912541b0 | 169 | return count; |
ba6929f6 KS |
170 | } |
171 | ||
cc4c1d22 | 172 | static void test_monitor(struct udev *udev) { |
8e766630 | 173 | _cleanup_(udev_monitor_unrefp) struct udev_monitor *udev_monitor; |
cc4c1d22 ZJS |
174 | _cleanup_close_ int fd_ep; |
175 | int fd_udev; | |
176 | struct epoll_event ep_udev = { | |
177 | .events = EPOLLIN, | |
178 | }, ep_stdin = { | |
179 | .events = EPOLLIN, | |
180 | .data.fd = STDIN_FILENO, | |
181 | }; | |
912541b0 KS |
182 | |
183 | fd_ep = epoll_create1(EPOLL_CLOEXEC); | |
cc4c1d22 | 184 | assert_se(fd_ep >= 0); |
912541b0 KS |
185 | |
186 | udev_monitor = udev_monitor_new_from_netlink(udev, "udev"); | |
cc4c1d22 | 187 | assert_se(udev_monitor != NULL); |
912541b0 | 188 | |
cc4c1d22 ZJS |
189 | fd_udev = udev_monitor_get_fd(udev_monitor); |
190 | ep_udev.data.fd = fd_udev; | |
912541b0 | 191 | |
cc4c1d22 ZJS |
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); | |
912541b0 | 195 | |
cc4c1d22 | 196 | assert_se(udev_monitor_enable_receiving(udev_monitor) >= 0); |
912541b0 | 197 | |
cc4c1d22 ZJS |
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); | |
912541b0 KS |
200 | |
201 | for (;;) { | |
202 | int fdcount; | |
203 | struct epoll_event ev[4]; | |
204 | struct udev_device *device; | |
205 | int i; | |
206 | ||
207 | printf("waiting for events from udev, press ENTER to exit\n"); | |
cc4c1d22 | 208 | fdcount = epoll_wait(fd_ep, ev, ELEMENTSOF(ev), -1); |
912541b0 KS |
209 | printf("epoll fd count: %i\n", fdcount); |
210 | ||
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"); | |
216 | continue; | |
217 | } | |
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"); | |
cc4c1d22 | 222 | return; |
912541b0 KS |
223 | } |
224 | } | |
225 | } | |
33a5cc29 KS |
226 | } |
227 | ||
cc4c1d22 | 228 | static void test_queue(struct udev *udev) { |
912541b0 | 229 | struct udev_queue *udev_queue; |
cc4c1d22 | 230 | bool empty; |
912541b0 KS |
231 | |
232 | udev_queue = udev_queue_new(udev); | |
cc4c1d22 | 233 | assert_se(udev_queue); |
912541b0 | 234 | |
cc4c1d22 ZJS |
235 | empty = udev_queue_get_queue_is_empty(udev_queue); |
236 | log_info("queue is %s", empty ? "empty" : "not empty"); | |
912541b0 | 237 | udev_queue_unref(udev_queue); |
64ccdf82 KS |
238 | } |
239 | ||
f168c273 | 240 | static int test_enumerate(struct udev *udev, const char *subsystem) { |
912541b0 | 241 | struct udev_enumerate *udev_enumerate; |
c0c6a4fc | 242 | int r; |
912541b0 | 243 | |
cc4c1d22 | 244 | log_info("enumerate '%s'", subsystem == NULL ? "<all>" : subsystem); |
912541b0 KS |
245 | udev_enumerate = udev_enumerate_new(udev); |
246 | if (udev_enumerate == NULL) | |
247 | return -1; | |
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); | |
252 | ||
cc4c1d22 | 253 | log_info("enumerate 'net' + duplicated scan + null + zero"); |
912541b0 KS |
254 | udev_enumerate = udev_enumerate_new(udev); |
255 | if (udev_enumerate == NULL) | |
256 | return -1; | |
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); | |
272 | ||
cc4c1d22 | 273 | log_info("enumerate 'block'"); |
912541b0 KS |
274 | udev_enumerate = udev_enumerate_new(udev); |
275 | if (udev_enumerate == NULL) | |
276 | return -1; | |
277 | udev_enumerate_add_match_subsystem(udev_enumerate,"block"); | |
c0c6a4fc | 278 | r = udev_enumerate_add_match_is_initialized(udev_enumerate); |
86ff9f11 TA |
279 | if (r < 0) { |
280 | udev_enumerate_unref(udev_enumerate); | |
c0c6a4fc | 281 | return r; |
86ff9f11 | 282 | } |
912541b0 KS |
283 | udev_enumerate_scan_devices(udev_enumerate); |
284 | test_enumerate_print_list(udev_enumerate); | |
285 | udev_enumerate_unref(udev_enumerate); | |
286 | ||
cc4c1d22 | 287 | log_info("enumerate 'not block'"); |
912541b0 KS |
288 | udev_enumerate = udev_enumerate_new(udev); |
289 | if (udev_enumerate == NULL) | |
290 | return -1; | |
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); | |
295 | ||
cc4c1d22 | 296 | log_info("enumerate 'pci, mem, vc'"); |
912541b0 KS |
297 | udev_enumerate = udev_enumerate_new(udev); |
298 | if (udev_enumerate == NULL) | |
299 | return -1; | |
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); | |
306 | ||
cc4c1d22 | 307 | log_info("enumerate 'subsystem'"); |
912541b0 KS |
308 | udev_enumerate = udev_enumerate_new(udev); |
309 | if (udev_enumerate == NULL) | |
310 | return -1; | |
311 | udev_enumerate_scan_subsystems(udev_enumerate); | |
312 | test_enumerate_print_list(udev_enumerate); | |
313 | udev_enumerate_unref(udev_enumerate); | |
314 | ||
cc4c1d22 | 315 | log_info("enumerate 'property IF_FS_*=filesystem'"); |
912541b0 KS |
316 | udev_enumerate = udev_enumerate_new(udev); |
317 | if (udev_enumerate == NULL) | |
318 | return -1; | |
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); | |
323 | return 0; | |
90d80c2e KS |
324 | } |
325 | ||
872c8faa | 326 | static void test_hwdb(struct udev *udev, const char *modalias) { |
960787ae | 327 | struct udev_hwdb *hwdb; |
2001208c KS |
328 | struct udev_list_entry *entry; |
329 | ||
330 | hwdb = udev_hwdb_new(udev); | |
331 | ||
332 | udev_list_entry_foreach(entry, udev_hwdb_get_properties_list_entry(hwdb, modalias, 0)) | |
cc4c1d22 | 333 | log_info("'%s'='%s'", udev_list_entry_get_name(entry), udev_list_entry_get_value(entry)); |
2001208c KS |
334 | |
335 | hwdb = udev_hwdb_unref(hwdb); | |
bdf7026e | 336 | assert_se(hwdb == NULL); |
2001208c KS |
337 | } |
338 | ||
f168c273 | 339 | int main(int argc, char *argv[]) { |
8e766630 | 340 | _cleanup_(udev_unrefp) struct udev *udev = NULL; |
301a9c67 | 341 | bool arg_monitor = false; |
912541b0 | 342 | static const struct option options[] = { |
cc4c1d22 | 343 | { "syspath", required_argument, NULL, 'p' }, |
912541b0 | 344 | { "subsystem", required_argument, NULL, 's' }, |
cc4c1d22 ZJS |
345 | { "debug", no_argument, NULL, 'd' }, |
346 | { "help", no_argument, NULL, 'h' }, | |
347 | { "version", no_argument, NULL, 'V' }, | |
301a9c67 | 348 | { "monitor", no_argument, NULL, 'm' }, |
912541b0 KS |
349 | {} |
350 | }; | |
351 | const char *syspath = "/devices/virtual/mem/null"; | |
352 | const char *subsystem = NULL; | |
601185b4 | 353 | int c; |
912541b0 KS |
354 | |
355 | udev = udev_new(); | |
cc4c1d22 | 356 | log_info("context: %p", udev); |
912541b0 | 357 | if (udev == NULL) { |
cc4c1d22 | 358 | log_info("no context"); |
912541b0 KS |
359 | return 1; |
360 | } | |
912541b0 | 361 | |
63547675 | 362 | while ((c = getopt_long(argc, argv, "p:s:dhVm", options, NULL)) >= 0) |
601185b4 | 363 | switch (c) { |
912541b0 | 364 | |
912541b0 KS |
365 | case 'p': |
366 | syspath = optarg; | |
367 | break; | |
601185b4 | 368 | |
912541b0 KS |
369 | case 's': |
370 | subsystem = optarg; | |
371 | break; | |
601185b4 | 372 | |
912541b0 | 373 | case 'd': |
25e773ee KS |
374 | if (log_get_max_level() < LOG_INFO) |
375 | log_set_max_level(LOG_INFO); | |
912541b0 | 376 | break; |
601185b4 | 377 | |
912541b0 KS |
378 | case 'h': |
379 | printf("--debug --syspath= --subsystem= --help\n"); | |
cc4c1d22 | 380 | return EXIT_SUCCESS; |
601185b4 | 381 | |
912541b0 | 382 | case 'V': |
948aaa7c | 383 | printf("%s\n", PACKAGE_VERSION); |
cc4c1d22 | 384 | return EXIT_SUCCESS; |
601185b4 | 385 | |
301a9c67 ZJS |
386 | case 'm': |
387 | arg_monitor = true; | |
388 | break; | |
389 | ||
601185b4 | 390 | case '?': |
cc4c1d22 | 391 | return EXIT_FAILURE; |
601185b4 ZJS |
392 | |
393 | default: | |
394 | assert_not_reached("Unhandled option code."); | |
912541b0 | 395 | } |
601185b4 | 396 | |
912541b0 | 397 | /* add sys path if needed */ |
cc4c1d22 ZJS |
398 | if (!startswith(syspath, "/sys")) |
399 | syspath = strjoina("/sys/", syspath); | |
912541b0 KS |
400 | |
401 | test_device(udev, syspath); | |
402 | test_device_devnum(udev); | |
cc4c1d22 ZJS |
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"); | |
407 | ||
912541b0 KS |
408 | test_device_parents(udev, syspath); |
409 | ||
410 | test_enumerate(udev, subsystem); | |
411 | ||
412 | test_queue(udev); | |
413 | ||
2001208c KS |
414 | test_hwdb(udev, "usb:v0D50p0011*"); |
415 | ||
301a9c67 ZJS |
416 | if (arg_monitor) |
417 | test_monitor(udev); | |
cc4c1d22 ZJS |
418 | |
419 | return EXIT_SUCCESS; | |
33a5cc29 | 420 | } |