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Commit | Line | Data |
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53e1b683 | 1 | /* SPDX-License-Identifier: LGPL-2.1+ */ |
33a5cc29 | 2 | |
5ea78a39 | 3 | #include <errno.h> |
b2d9e4f2 | 4 | #include <getopt.h> |
07630cea | 5 | #include <stdio.h> |
f2fd4d27 | 6 | #include <sys/epoll.h> |
07630cea | 7 | #include <unistd.h> |
ba6929f6 | 8 | |
cc4c1d22 | 9 | #include "fd-util.h" |
5ea78a39 | 10 | #include "libudev-util.h" |
cc4c1d22 | 11 | #include "log.h" |
d054f0a4 | 12 | #include "stdio-util.h" |
07630cea | 13 | #include "string-util.h" |
33a5cc29 | 14 | |
f168c273 | 15 | static void print_device(struct udev_device *device) { |
912541b0 KS |
16 | const char *str; |
17 | dev_t devnum; | |
18 | int count; | |
19 | struct udev_list_entry *list_entry; | |
20 | ||
cc4c1d22 | 21 | log_info("*** device: %p ***", device); |
912541b0 KS |
22 | str = udev_device_get_action(device); |
23 | if (str != NULL) | |
cc4c1d22 | 24 | log_info("action: '%s'", str); |
912541b0 KS |
25 | |
26 | str = udev_device_get_syspath(device); | |
cc4c1d22 | 27 | log_info("syspath: '%s'", str); |
912541b0 KS |
28 | |
29 | str = udev_device_get_sysname(device); | |
cc4c1d22 | 30 | log_info("sysname: '%s'", str); |
912541b0 KS |
31 | |
32 | str = udev_device_get_sysnum(device); | |
33 | if (str != NULL) | |
cc4c1d22 | 34 | log_info("sysnum: '%s'", str); |
912541b0 KS |
35 | |
36 | str = udev_device_get_devpath(device); | |
cc4c1d22 | 37 | log_info("devpath: '%s'", str); |
912541b0 KS |
38 | |
39 | str = udev_device_get_subsystem(device); | |
40 | if (str != NULL) | |
cc4c1d22 | 41 | log_info("subsystem: '%s'", str); |
912541b0 KS |
42 | |
43 | str = udev_device_get_devtype(device); | |
44 | if (str != NULL) | |
cc4c1d22 | 45 | log_info("devtype: '%s'", str); |
912541b0 KS |
46 | |
47 | str = udev_device_get_driver(device); | |
48 | if (str != NULL) | |
cc4c1d22 | 49 | log_info("driver: '%s'", str); |
912541b0 KS |
50 | |
51 | str = udev_device_get_devnode(device); | |
52 | if (str != NULL) | |
cc4c1d22 | 53 | log_info("devname: '%s'", str); |
912541b0 KS |
54 | |
55 | devnum = udev_device_get_devnum(device); | |
56 | if (major(devnum) > 0) | |
cc4c1d22 | 57 | log_info("devnum: %u:%u", major(devnum), minor(devnum)); |
912541b0 KS |
58 | |
59 | count = 0; | |
60 | udev_list_entry_foreach(list_entry, udev_device_get_devlinks_list_entry(device)) { | |
cc4c1d22 | 61 | log_info("link: '%s'", udev_list_entry_get_name(list_entry)); |
912541b0 KS |
62 | count++; |
63 | } | |
64 | if (count > 0) | |
cc4c1d22 | 65 | log_info("found %i links", count); |
912541b0 KS |
66 | |
67 | count = 0; | |
68 | udev_list_entry_foreach(list_entry, udev_device_get_properties_list_entry(device)) { | |
cc4c1d22 | 69 | log_info("property: '%s=%s'", |
912541b0 KS |
70 | udev_list_entry_get_name(list_entry), |
71 | udev_list_entry_get_value(list_entry)); | |
72 | count++; | |
73 | } | |
74 | if (count > 0) | |
cc4c1d22 | 75 | log_info("found %i properties", count); |
912541b0 KS |
76 | |
77 | str = udev_device_get_property_value(device, "MAJOR"); | |
78 | if (str != NULL) | |
cc4c1d22 | 79 | log_info("MAJOR: '%s'", str); |
912541b0 KS |
80 | |
81 | str = udev_device_get_sysattr_value(device, "dev"); | |
82 | if (str != NULL) | |
cc4c1d22 | 83 | log_info("attr{dev}: '%s'", str); |
ba6929f6 KS |
84 | } |
85 | ||
cc4c1d22 | 86 | static void test_device(struct udev *udev, const char *syspath) { |
8e766630 | 87 | _cleanup_(udev_device_unrefp) struct udev_device *device; |
912541b0 | 88 | |
cc4c1d22 | 89 | log_info("looking at device: %s", syspath); |
912541b0 | 90 | device = udev_device_new_from_syspath(udev, syspath); |
cc4c1d22 ZJS |
91 | if (device == NULL) |
92 | log_warning_errno(errno, "udev_device_new_from_syspath: %m"); | |
93 | else | |
94 | print_device(device); | |
33a5cc29 KS |
95 | } |
96 | ||
cc4c1d22 | 97 | static void test_device_parents(struct udev *udev, const char *syspath) { |
8e766630 | 98 | _cleanup_(udev_device_unrefp) struct udev_device *device; |
912541b0 KS |
99 | struct udev_device *device_parent; |
100 | ||
cc4c1d22 | 101 | log_info("looking at device: %s", syspath); |
912541b0 KS |
102 | device = udev_device_new_from_syspath(udev, syspath); |
103 | if (device == NULL) | |
cc4c1d22 | 104 | return; |
912541b0 | 105 | |
cc4c1d22 | 106 | log_info("looking at parents"); |
912541b0 KS |
107 | device_parent = device; |
108 | do { | |
109 | print_device(device_parent); | |
110 | device_parent = udev_device_get_parent(device_parent); | |
111 | } while (device_parent != NULL); | |
112 | ||
cc4c1d22 | 113 | log_info("looking at parents again"); |
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); | |
4ad3a37f KS |
119 | } |
120 | ||
cc4c1d22 | 121 | static void test_device_devnum(struct udev *udev) { |
912541b0 | 122 | dev_t devnum = makedev(1, 3); |
8e766630 | 123 | _cleanup_(udev_device_unrefp) struct udev_device *device; |
912541b0 | 124 | |
cc4c1d22 | 125 | log_info("looking up device: %u:%u", major(devnum), minor(devnum)); |
912541b0 KS |
126 | device = udev_device_new_from_devnum(udev, 'c', devnum); |
127 | if (device == NULL) | |
cc4c1d22 ZJS |
128 | log_warning_errno(errno, "udev_device_new_from_devnum: %m"); |
129 | else | |
130 | print_device(device); | |
4c9dff47 KS |
131 | } |
132 | ||
cc4c1d22 | 133 | static void test_device_subsys_name(struct udev *udev, const char *subsys, const char *dev) { |
8e766630 | 134 | _cleanup_(udev_device_unrefp) struct udev_device *device; |
912541b0 | 135 | |
cc4c1d22 ZJS |
136 | log_info("looking up device: '%s:%s'", subsys, dev); |
137 | device = udev_device_new_from_subsystem_sysname(udev, subsys, dev); | |
912541b0 | 138 | if (device == NULL) |
cc4c1d22 ZJS |
139 | log_warning_errno(errno, "udev_device_new_from_subsystem_sysname: %m"); |
140 | else | |
141 | print_device(device); | |
90d80c2e KS |
142 | } |
143 | ||
f168c273 | 144 | static int test_enumerate_print_list(struct udev_enumerate *enumerate) { |
912541b0 KS |
145 | struct udev_list_entry *list_entry; |
146 | int count = 0; | |
147 | ||
148 | udev_list_entry_foreach(list_entry, udev_enumerate_get_list_entry(enumerate)) { | |
149 | struct udev_device *device; | |
150 | ||
151 | device = udev_device_new_from_syspath(udev_enumerate_get_udev(enumerate), | |
152 | udev_list_entry_get_name(list_entry)); | |
153 | if (device != NULL) { | |
cc4c1d22 ZJS |
154 | log_info("device: '%s' (%s)", |
155 | udev_device_get_syspath(device), | |
156 | udev_device_get_subsystem(device)); | |
912541b0 KS |
157 | udev_device_unref(device); |
158 | count++; | |
159 | } | |
160 | } | |
cc4c1d22 | 161 | log_info("found %i devices", count); |
912541b0 | 162 | return count; |
ba6929f6 KS |
163 | } |
164 | ||
cc4c1d22 | 165 | static void test_monitor(struct udev *udev) { |
8e766630 | 166 | _cleanup_(udev_monitor_unrefp) struct udev_monitor *udev_monitor; |
cc4c1d22 ZJS |
167 | _cleanup_close_ int fd_ep; |
168 | int fd_udev; | |
169 | struct epoll_event ep_udev = { | |
170 | .events = EPOLLIN, | |
171 | }, ep_stdin = { | |
172 | .events = EPOLLIN, | |
173 | .data.fd = STDIN_FILENO, | |
174 | }; | |
912541b0 KS |
175 | |
176 | fd_ep = epoll_create1(EPOLL_CLOEXEC); | |
cc4c1d22 | 177 | assert_se(fd_ep >= 0); |
912541b0 KS |
178 | |
179 | udev_monitor = udev_monitor_new_from_netlink(udev, "udev"); | |
cc4c1d22 | 180 | assert_se(udev_monitor != NULL); |
912541b0 | 181 | |
cc4c1d22 ZJS |
182 | fd_udev = udev_monitor_get_fd(udev_monitor); |
183 | ep_udev.data.fd = fd_udev; | |
912541b0 | 184 | |
cc4c1d22 ZJS |
185 | assert_se(udev_monitor_filter_add_match_subsystem_devtype(udev_monitor, "block", NULL) >= 0); |
186 | assert_se(udev_monitor_filter_add_match_subsystem_devtype(udev_monitor, "tty", NULL) >= 0); | |
187 | assert_se(udev_monitor_filter_add_match_subsystem_devtype(udev_monitor, "usb", "usb_device") >= 0); | |
912541b0 | 188 | |
cc4c1d22 | 189 | assert_se(udev_monitor_enable_receiving(udev_monitor) >= 0); |
912541b0 | 190 | |
cc4c1d22 ZJS |
191 | assert_se(epoll_ctl(fd_ep, EPOLL_CTL_ADD, fd_udev, &ep_udev) >= 0); |
192 | assert_se(epoll_ctl(fd_ep, EPOLL_CTL_ADD, STDIN_FILENO, &ep_stdin) >= 0); | |
912541b0 KS |
193 | |
194 | for (;;) { | |
195 | int fdcount; | |
196 | struct epoll_event ev[4]; | |
197 | struct udev_device *device; | |
198 | int i; | |
199 | ||
200 | printf("waiting for events from udev, press ENTER to exit\n"); | |
cc4c1d22 | 201 | fdcount = epoll_wait(fd_ep, ev, ELEMENTSOF(ev), -1); |
912541b0 KS |
202 | printf("epoll fd count: %i\n", fdcount); |
203 | ||
204 | for (i = 0; i < fdcount; i++) { | |
205 | if (ev[i].data.fd == fd_udev && ev[i].events & EPOLLIN) { | |
206 | device = udev_monitor_receive_device(udev_monitor); | |
207 | if (device == NULL) { | |
208 | printf("no device from socket\n"); | |
209 | continue; | |
210 | } | |
211 | print_device(device); | |
212 | udev_device_unref(device); | |
213 | } else if (ev[i].data.fd == STDIN_FILENO && ev[i].events & EPOLLIN) { | |
214 | printf("exiting loop\n"); | |
cc4c1d22 | 215 | return; |
912541b0 KS |
216 | } |
217 | } | |
218 | } | |
33a5cc29 KS |
219 | } |
220 | ||
cc4c1d22 | 221 | static void test_queue(struct udev *udev) { |
912541b0 | 222 | struct udev_queue *udev_queue; |
cc4c1d22 | 223 | bool empty; |
912541b0 KS |
224 | |
225 | udev_queue = udev_queue_new(udev); | |
cc4c1d22 | 226 | assert_se(udev_queue); |
912541b0 | 227 | |
cc4c1d22 ZJS |
228 | empty = udev_queue_get_queue_is_empty(udev_queue); |
229 | log_info("queue is %s", empty ? "empty" : "not empty"); | |
912541b0 | 230 | udev_queue_unref(udev_queue); |
64ccdf82 KS |
231 | } |
232 | ||
f168c273 | 233 | static int test_enumerate(struct udev *udev, const char *subsystem) { |
912541b0 | 234 | struct udev_enumerate *udev_enumerate; |
c0c6a4fc | 235 | int r; |
912541b0 | 236 | |
cc4c1d22 | 237 | log_info("enumerate '%s'", subsystem == NULL ? "<all>" : subsystem); |
912541b0 KS |
238 | udev_enumerate = udev_enumerate_new(udev); |
239 | if (udev_enumerate == NULL) | |
240 | return -1; | |
241 | udev_enumerate_add_match_subsystem(udev_enumerate, subsystem); | |
242 | udev_enumerate_scan_devices(udev_enumerate); | |
243 | test_enumerate_print_list(udev_enumerate); | |
244 | udev_enumerate_unref(udev_enumerate); | |
245 | ||
cc4c1d22 | 246 | log_info("enumerate 'net' + duplicated scan + null + zero"); |
912541b0 KS |
247 | udev_enumerate = udev_enumerate_new(udev); |
248 | if (udev_enumerate == NULL) | |
249 | return -1; | |
250 | udev_enumerate_add_match_subsystem(udev_enumerate, "net"); | |
251 | udev_enumerate_scan_devices(udev_enumerate); | |
252 | udev_enumerate_scan_devices(udev_enumerate); | |
253 | udev_enumerate_add_syspath(udev_enumerate, "/sys/class/mem/zero"); | |
254 | udev_enumerate_add_syspath(udev_enumerate, "/sys/class/mem/null"); | |
255 | udev_enumerate_add_syspath(udev_enumerate, "/sys/class/mem/zero"); | |
256 | udev_enumerate_add_syspath(udev_enumerate, "/sys/class/mem/null"); | |
257 | udev_enumerate_add_syspath(udev_enumerate, "/sys/class/mem/zero"); | |
258 | udev_enumerate_add_syspath(udev_enumerate, "/sys/class/mem/null"); | |
259 | udev_enumerate_add_syspath(udev_enumerate, "/sys/class/mem/null"); | |
260 | udev_enumerate_add_syspath(udev_enumerate, "/sys/class/mem/zero"); | |
261 | udev_enumerate_add_syspath(udev_enumerate, "/sys/class/mem/zero"); | |
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 'block'"); |
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,"block"); | |
c0c6a4fc | 271 | r = udev_enumerate_add_match_is_initialized(udev_enumerate); |
86ff9f11 TA |
272 | if (r < 0) { |
273 | udev_enumerate_unref(udev_enumerate); | |
c0c6a4fc | 274 | return r; |
86ff9f11 | 275 | } |
912541b0 KS |
276 | udev_enumerate_scan_devices(udev_enumerate); |
277 | test_enumerate_print_list(udev_enumerate); | |
278 | udev_enumerate_unref(udev_enumerate); | |
279 | ||
cc4c1d22 | 280 | log_info("enumerate 'not block'"); |
912541b0 KS |
281 | udev_enumerate = udev_enumerate_new(udev); |
282 | if (udev_enumerate == NULL) | |
283 | return -1; | |
284 | udev_enumerate_add_nomatch_subsystem(udev_enumerate, "block"); | |
285 | udev_enumerate_scan_devices(udev_enumerate); | |
286 | test_enumerate_print_list(udev_enumerate); | |
287 | udev_enumerate_unref(udev_enumerate); | |
288 | ||
cc4c1d22 | 289 | log_info("enumerate 'pci, mem, vc'"); |
912541b0 KS |
290 | udev_enumerate = udev_enumerate_new(udev); |
291 | if (udev_enumerate == NULL) | |
292 | return -1; | |
293 | udev_enumerate_add_match_subsystem(udev_enumerate, "pci"); | |
294 | udev_enumerate_add_match_subsystem(udev_enumerate, "mem"); | |
295 | udev_enumerate_add_match_subsystem(udev_enumerate, "vc"); | |
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 'subsystem'"); |
912541b0 KS |
301 | udev_enumerate = udev_enumerate_new(udev); |
302 | if (udev_enumerate == NULL) | |
303 | return -1; | |
304 | udev_enumerate_scan_subsystems(udev_enumerate); | |
305 | test_enumerate_print_list(udev_enumerate); | |
306 | udev_enumerate_unref(udev_enumerate); | |
307 | ||
cc4c1d22 | 308 | log_info("enumerate 'property IF_FS_*=filesystem'"); |
912541b0 KS |
309 | udev_enumerate = udev_enumerate_new(udev); |
310 | if (udev_enumerate == NULL) | |
311 | return -1; | |
312 | udev_enumerate_add_match_property(udev_enumerate, "ID_FS*", "filesystem"); | |
313 | udev_enumerate_scan_devices(udev_enumerate); | |
314 | test_enumerate_print_list(udev_enumerate); | |
315 | udev_enumerate_unref(udev_enumerate); | |
316 | return 0; | |
90d80c2e KS |
317 | } |
318 | ||
872c8faa | 319 | static void test_hwdb(struct udev *udev, const char *modalias) { |
960787ae | 320 | struct udev_hwdb *hwdb; |
2001208c KS |
321 | struct udev_list_entry *entry; |
322 | ||
323 | hwdb = udev_hwdb_new(udev); | |
324 | ||
325 | udev_list_entry_foreach(entry, udev_hwdb_get_properties_list_entry(hwdb, modalias, 0)) | |
cc4c1d22 | 326 | log_info("'%s'='%s'", udev_list_entry_get_name(entry), udev_list_entry_get_value(entry)); |
2001208c KS |
327 | |
328 | hwdb = udev_hwdb_unref(hwdb); | |
bdf7026e | 329 | assert_se(hwdb == NULL); |
2001208c KS |
330 | } |
331 | ||
f168c273 | 332 | int main(int argc, char *argv[]) { |
8e766630 | 333 | _cleanup_(udev_unrefp) struct udev *udev = NULL; |
301a9c67 | 334 | bool arg_monitor = false; |
912541b0 | 335 | static const struct option options[] = { |
cc4c1d22 | 336 | { "syspath", required_argument, NULL, 'p' }, |
912541b0 | 337 | { "subsystem", required_argument, NULL, 's' }, |
cc4c1d22 ZJS |
338 | { "debug", no_argument, NULL, 'd' }, |
339 | { "help", no_argument, NULL, 'h' }, | |
340 | { "version", no_argument, NULL, 'V' }, | |
301a9c67 | 341 | { "monitor", no_argument, NULL, 'm' }, |
912541b0 KS |
342 | {} |
343 | }; | |
344 | const char *syspath = "/devices/virtual/mem/null"; | |
345 | const char *subsystem = NULL; | |
601185b4 | 346 | int c; |
912541b0 KS |
347 | |
348 | udev = udev_new(); | |
cc4c1d22 | 349 | log_info("context: %p", udev); |
912541b0 | 350 | if (udev == NULL) { |
cc4c1d22 | 351 | log_info("no context"); |
912541b0 KS |
352 | return 1; |
353 | } | |
912541b0 | 354 | |
63547675 | 355 | while ((c = getopt_long(argc, argv, "p:s:dhVm", options, NULL)) >= 0) |
601185b4 | 356 | switch (c) { |
912541b0 | 357 | |
912541b0 KS |
358 | case 'p': |
359 | syspath = optarg; | |
360 | break; | |
601185b4 | 361 | |
912541b0 KS |
362 | case 's': |
363 | subsystem = optarg; | |
364 | break; | |
601185b4 | 365 | |
912541b0 | 366 | case 'd': |
25e773ee KS |
367 | if (log_get_max_level() < LOG_INFO) |
368 | log_set_max_level(LOG_INFO); | |
912541b0 | 369 | break; |
601185b4 | 370 | |
912541b0 KS |
371 | case 'h': |
372 | printf("--debug --syspath= --subsystem= --help\n"); | |
cc4c1d22 | 373 | return EXIT_SUCCESS; |
601185b4 | 374 | |
912541b0 | 375 | case 'V': |
948aaa7c | 376 | printf("%s\n", PACKAGE_VERSION); |
cc4c1d22 | 377 | return EXIT_SUCCESS; |
601185b4 | 378 | |
301a9c67 ZJS |
379 | case 'm': |
380 | arg_monitor = true; | |
381 | break; | |
382 | ||
601185b4 | 383 | case '?': |
cc4c1d22 | 384 | return EXIT_FAILURE; |
601185b4 ZJS |
385 | |
386 | default: | |
387 | assert_not_reached("Unhandled option code."); | |
912541b0 | 388 | } |
601185b4 | 389 | |
912541b0 | 390 | /* add sys path if needed */ |
cc4c1d22 ZJS |
391 | if (!startswith(syspath, "/sys")) |
392 | syspath = strjoina("/sys/", syspath); | |
912541b0 KS |
393 | |
394 | test_device(udev, syspath); | |
395 | test_device_devnum(udev); | |
cc4c1d22 ZJS |
396 | test_device_subsys_name(udev, "block", "sda"); |
397 | test_device_subsys_name(udev, "subsystem", "pci"); | |
398 | test_device_subsys_name(udev, "drivers", "scsi:sd"); | |
399 | test_device_subsys_name(udev, "module", "printk"); | |
400 | ||
912541b0 KS |
401 | test_device_parents(udev, syspath); |
402 | ||
403 | test_enumerate(udev, subsystem); | |
404 | ||
405 | test_queue(udev); | |
406 | ||
2001208c KS |
407 | test_hwdb(udev, "usb:v0D50p0011*"); |
408 | ||
301a9c67 ZJS |
409 | if (arg_monitor) |
410 | test_monitor(udev); | |
cc4c1d22 ZJS |
411 | |
412 | return EXIT_SUCCESS; | |
33a5cc29 | 413 | } |