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601185b4 | 1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
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" |
07630cea | 27 | #include "string-util.h" |
1ca208fb | 28 | #include "udev-util.h" |
33502ffe | 29 | #include "util.h" |
33a5cc29 | 30 | |
f2fd4d27 KS |
31 | #define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0])) |
32 | ||
f168c273 | 33 | static void print_device(struct udev_device *device) { |
912541b0 KS |
34 | const char *str; |
35 | dev_t devnum; | |
36 | int count; | |
37 | struct udev_list_entry *list_entry; | |
38 | ||
39 | printf("*** device: %p ***\n", device); | |
40 | str = udev_device_get_action(device); | |
41 | if (str != NULL) | |
42 | printf("action: '%s'\n", str); | |
43 | ||
44 | str = udev_device_get_syspath(device); | |
45 | printf("syspath: '%s'\n", str); | |
46 | ||
47 | str = udev_device_get_sysname(device); | |
48 | printf("sysname: '%s'\n", str); | |
49 | ||
50 | str = udev_device_get_sysnum(device); | |
51 | if (str != NULL) | |
52 | printf("sysnum: '%s'\n", str); | |
53 | ||
54 | str = udev_device_get_devpath(device); | |
55 | printf("devpath: '%s'\n", str); | |
56 | ||
57 | str = udev_device_get_subsystem(device); | |
58 | if (str != NULL) | |
59 | printf("subsystem: '%s'\n", str); | |
60 | ||
61 | str = udev_device_get_devtype(device); | |
62 | if (str != NULL) | |
63 | printf("devtype: '%s'\n", str); | |
64 | ||
65 | str = udev_device_get_driver(device); | |
66 | if (str != NULL) | |
67 | printf("driver: '%s'\n", str); | |
68 | ||
69 | str = udev_device_get_devnode(device); | |
70 | if (str != NULL) | |
71 | printf("devname: '%s'\n", str); | |
72 | ||
73 | devnum = udev_device_get_devnum(device); | |
74 | if (major(devnum) > 0) | |
75 | printf("devnum: %u:%u\n", major(devnum), minor(devnum)); | |
76 | ||
77 | count = 0; | |
78 | udev_list_entry_foreach(list_entry, udev_device_get_devlinks_list_entry(device)) { | |
79 | printf("link: '%s'\n", udev_list_entry_get_name(list_entry)); | |
80 | count++; | |
81 | } | |
82 | if (count > 0) | |
83 | printf("found %i links\n", count); | |
84 | ||
85 | count = 0; | |
86 | udev_list_entry_foreach(list_entry, udev_device_get_properties_list_entry(device)) { | |
87 | printf("property: '%s=%s'\n", | |
88 | udev_list_entry_get_name(list_entry), | |
89 | udev_list_entry_get_value(list_entry)); | |
90 | count++; | |
91 | } | |
92 | if (count > 0) | |
93 | printf("found %i properties\n", count); | |
94 | ||
95 | str = udev_device_get_property_value(device, "MAJOR"); | |
96 | if (str != NULL) | |
97 | printf("MAJOR: '%s'\n", str); | |
98 | ||
99 | str = udev_device_get_sysattr_value(device, "dev"); | |
100 | if (str != NULL) | |
101 | printf("attr{dev}: '%s'\n", str); | |
102 | ||
103 | printf("\n"); | |
ba6929f6 KS |
104 | } |
105 | ||
f168c273 | 106 | static int test_device(struct udev *udev, const char *syspath) { |
1ca208fb | 107 | _cleanup_udev_device_unref_ struct udev_device *device; |
912541b0 KS |
108 | |
109 | printf("looking at device: %s\n", syspath); | |
110 | device = udev_device_new_from_syspath(udev, syspath); | |
111 | if (device == NULL) { | |
112 | printf("no device found\n"); | |
113 | return -1; | |
114 | } | |
115 | print_device(device); | |
1ca208fb | 116 | |
912541b0 | 117 | return 0; |
33a5cc29 KS |
118 | } |
119 | ||
f168c273 | 120 | static int test_device_parents(struct udev *udev, const char *syspath) { |
1ca208fb | 121 | _cleanup_udev_device_unref_ struct udev_device *device; |
912541b0 KS |
122 | struct udev_device *device_parent; |
123 | ||
124 | printf("looking at device: %s\n", syspath); | |
125 | device = udev_device_new_from_syspath(udev, syspath); | |
126 | if (device == NULL) | |
127 | return -1; | |
128 | ||
129 | printf("looking at parents\n"); | |
130 | device_parent = device; | |
131 | do { | |
132 | print_device(device_parent); | |
133 | device_parent = udev_device_get_parent(device_parent); | |
134 | } while (device_parent != NULL); | |
135 | ||
136 | printf("looking at parents again\n"); | |
137 | device_parent = device; | |
138 | do { | |
139 | print_device(device_parent); | |
140 | device_parent = udev_device_get_parent(device_parent); | |
141 | } while (device_parent != NULL); | |
912541b0 KS |
142 | |
143 | return 0; | |
4ad3a37f KS |
144 | } |
145 | ||
f168c273 | 146 | static int test_device_devnum(struct udev *udev) { |
912541b0 KS |
147 | dev_t devnum = makedev(1, 3); |
148 | struct udev_device *device; | |
149 | ||
150 | printf("looking up device: %u:%u\n", major(devnum), minor(devnum)); | |
151 | device = udev_device_new_from_devnum(udev, 'c', devnum); | |
152 | if (device == NULL) | |
153 | return -1; | |
154 | print_device(device); | |
155 | udev_device_unref(device); | |
156 | return 0; | |
4c9dff47 KS |
157 | } |
158 | ||
f168c273 | 159 | static int test_device_subsys_name(struct udev *udev) { |
912541b0 KS |
160 | struct udev_device *device; |
161 | ||
162 | printf("looking up device: 'block':'sda'\n"); | |
163 | device = udev_device_new_from_subsystem_sysname(udev, "block", "sda"); | |
164 | if (device == NULL) | |
165 | return -1; | |
166 | print_device(device); | |
167 | udev_device_unref(device); | |
168 | ||
169 | printf("looking up device: 'subsystem':'pci'\n"); | |
170 | device = udev_device_new_from_subsystem_sysname(udev, "subsystem", "pci"); | |
171 | if (device == NULL) | |
172 | return -1; | |
173 | print_device(device); | |
174 | udev_device_unref(device); | |
175 | ||
176 | printf("looking up device: 'drivers':'scsi:sd'\n"); | |
177 | device = udev_device_new_from_subsystem_sysname(udev, "drivers", "scsi:sd"); | |
178 | if (device == NULL) | |
179 | return -1; | |
180 | print_device(device); | |
181 | udev_device_unref(device); | |
182 | ||
183 | printf("looking up device: 'module':'printk'\n"); | |
184 | device = udev_device_new_from_subsystem_sysname(udev, "module", "printk"); | |
185 | if (device == NULL) | |
186 | return -1; | |
187 | print_device(device); | |
188 | udev_device_unref(device); | |
189 | return 0; | |
90d80c2e KS |
190 | } |
191 | ||
f168c273 | 192 | static int test_enumerate_print_list(struct udev_enumerate *enumerate) { |
912541b0 KS |
193 | struct udev_list_entry *list_entry; |
194 | int count = 0; | |
195 | ||
196 | udev_list_entry_foreach(list_entry, udev_enumerate_get_list_entry(enumerate)) { | |
197 | struct udev_device *device; | |
198 | ||
199 | device = udev_device_new_from_syspath(udev_enumerate_get_udev(enumerate), | |
200 | udev_list_entry_get_name(list_entry)); | |
201 | if (device != NULL) { | |
202 | printf("device: '%s' (%s)\n", | |
203 | udev_device_get_syspath(device), | |
204 | udev_device_get_subsystem(device)); | |
205 | udev_device_unref(device); | |
206 | count++; | |
207 | } | |
208 | } | |
209 | printf("found %i devices\n\n", count); | |
210 | return count; | |
ba6929f6 KS |
211 | } |
212 | ||
f168c273 | 213 | static int test_monitor(struct udev *udev) { |
912541b0 KS |
214 | struct udev_monitor *udev_monitor = NULL; |
215 | int fd_ep; | |
216 | int fd_udev = -1; | |
217 | struct epoll_event ep_udev, ep_stdin; | |
218 | ||
219 | fd_ep = epoll_create1(EPOLL_CLOEXEC); | |
220 | if (fd_ep < 0) { | |
221 | printf("error creating epoll fd: %m\n"); | |
222 | goto out; | |
223 | } | |
224 | ||
225 | udev_monitor = udev_monitor_new_from_netlink(udev, "udev"); | |
226 | if (udev_monitor == NULL) { | |
227 | printf("no socket\n"); | |
228 | goto out; | |
229 | } | |
230 | fd_udev = udev_monitor_get_fd(udev_monitor); | |
231 | ||
232 | if (udev_monitor_filter_add_match_subsystem_devtype(udev_monitor, "block", NULL) < 0 || | |
233 | udev_monitor_filter_add_match_subsystem_devtype(udev_monitor, "tty", NULL) < 0 || | |
234 | udev_monitor_filter_add_match_subsystem_devtype(udev_monitor, "usb", "usb_device") < 0) { | |
235 | printf("filter failed\n"); | |
236 | goto out; | |
237 | } | |
238 | ||
239 | if (udev_monitor_enable_receiving(udev_monitor) < 0) { | |
240 | printf("bind failed\n"); | |
241 | goto out; | |
242 | } | |
243 | ||
29804cc1 | 244 | memzero(&ep_udev, sizeof(struct epoll_event)); |
912541b0 KS |
245 | ep_udev.events = EPOLLIN; |
246 | ep_udev.data.fd = fd_udev; | |
247 | if (epoll_ctl(fd_ep, EPOLL_CTL_ADD, fd_udev, &ep_udev) < 0) { | |
248 | printf("fail to add fd to epoll: %m\n"); | |
249 | goto out; | |
250 | } | |
251 | ||
29804cc1 | 252 | memzero(&ep_stdin, sizeof(struct epoll_event)); |
912541b0 KS |
253 | ep_stdin.events = EPOLLIN; |
254 | ep_stdin.data.fd = STDIN_FILENO; | |
255 | if (epoll_ctl(fd_ep, EPOLL_CTL_ADD, STDIN_FILENO, &ep_stdin) < 0) { | |
256 | printf("fail to add fd to epoll: %m\n"); | |
257 | goto out; | |
258 | } | |
259 | ||
260 | for (;;) { | |
261 | int fdcount; | |
262 | struct epoll_event ev[4]; | |
263 | struct udev_device *device; | |
264 | int i; | |
265 | ||
266 | printf("waiting for events from udev, press ENTER to exit\n"); | |
267 | fdcount = epoll_wait(fd_ep, ev, ARRAY_SIZE(ev), -1); | |
268 | printf("epoll fd count: %i\n", fdcount); | |
269 | ||
270 | for (i = 0; i < fdcount; i++) { | |
271 | if (ev[i].data.fd == fd_udev && ev[i].events & EPOLLIN) { | |
272 | device = udev_monitor_receive_device(udev_monitor); | |
273 | if (device == NULL) { | |
274 | printf("no device from socket\n"); | |
275 | continue; | |
276 | } | |
277 | print_device(device); | |
278 | udev_device_unref(device); | |
279 | } else if (ev[i].data.fd == STDIN_FILENO && ev[i].events & EPOLLIN) { | |
280 | printf("exiting loop\n"); | |
281 | goto out; | |
282 | } | |
283 | } | |
284 | } | |
f2fd4d27 | 285 | out: |
912541b0 KS |
286 | if (fd_ep >= 0) |
287 | close(fd_ep); | |
288 | udev_monitor_unref(udev_monitor); | |
289 | return 0; | |
33a5cc29 KS |
290 | } |
291 | ||
f168c273 | 292 | static int test_queue(struct udev *udev) { |
912541b0 | 293 | struct udev_queue *udev_queue; |
912541b0 KS |
294 | |
295 | udev_queue = udev_queue_new(udev); | |
296 | if (udev_queue == NULL) | |
297 | return -1; | |
912541b0 KS |
298 | |
299 | if (udev_queue_get_queue_is_empty(udev_queue)) | |
300 | printf("queue is empty\n"); | |
912541b0 | 301 | |
912541b0 KS |
302 | udev_queue_unref(udev_queue); |
303 | return 0; | |
64ccdf82 KS |
304 | } |
305 | ||
f168c273 | 306 | static int test_enumerate(struct udev *udev, const char *subsystem) { |
912541b0 | 307 | struct udev_enumerate *udev_enumerate; |
c0c6a4fc | 308 | int r; |
912541b0 KS |
309 | |
310 | printf("enumerate '%s'\n", subsystem == NULL ? "<all>" : subsystem); | |
311 | udev_enumerate = udev_enumerate_new(udev); | |
312 | if (udev_enumerate == NULL) | |
313 | return -1; | |
314 | udev_enumerate_add_match_subsystem(udev_enumerate, subsystem); | |
315 | udev_enumerate_scan_devices(udev_enumerate); | |
316 | test_enumerate_print_list(udev_enumerate); | |
317 | udev_enumerate_unref(udev_enumerate); | |
318 | ||
319 | printf("enumerate 'net' + duplicated scan + null + zero\n"); | |
320 | udev_enumerate = udev_enumerate_new(udev); | |
321 | if (udev_enumerate == NULL) | |
322 | return -1; | |
323 | udev_enumerate_add_match_subsystem(udev_enumerate, "net"); | |
324 | udev_enumerate_scan_devices(udev_enumerate); | |
325 | udev_enumerate_scan_devices(udev_enumerate); | |
326 | udev_enumerate_add_syspath(udev_enumerate, "/sys/class/mem/zero"); | |
327 | udev_enumerate_add_syspath(udev_enumerate, "/sys/class/mem/null"); | |
328 | udev_enumerate_add_syspath(udev_enumerate, "/sys/class/mem/zero"); | |
329 | udev_enumerate_add_syspath(udev_enumerate, "/sys/class/mem/null"); | |
330 | udev_enumerate_add_syspath(udev_enumerate, "/sys/class/mem/zero"); | |
331 | udev_enumerate_add_syspath(udev_enumerate, "/sys/class/mem/null"); | |
332 | udev_enumerate_add_syspath(udev_enumerate, "/sys/class/mem/null"); | |
333 | udev_enumerate_add_syspath(udev_enumerate, "/sys/class/mem/zero"); | |
334 | udev_enumerate_add_syspath(udev_enumerate, "/sys/class/mem/zero"); | |
335 | udev_enumerate_scan_devices(udev_enumerate); | |
336 | test_enumerate_print_list(udev_enumerate); | |
337 | udev_enumerate_unref(udev_enumerate); | |
338 | ||
339 | printf("enumerate 'block'\n"); | |
340 | udev_enumerate = udev_enumerate_new(udev); | |
341 | if (udev_enumerate == NULL) | |
342 | return -1; | |
343 | udev_enumerate_add_match_subsystem(udev_enumerate,"block"); | |
c0c6a4fc | 344 | r = udev_enumerate_add_match_is_initialized(udev_enumerate); |
86ff9f11 TA |
345 | if (r < 0) { |
346 | udev_enumerate_unref(udev_enumerate); | |
c0c6a4fc | 347 | return r; |
86ff9f11 | 348 | } |
912541b0 KS |
349 | udev_enumerate_scan_devices(udev_enumerate); |
350 | test_enumerate_print_list(udev_enumerate); | |
351 | udev_enumerate_unref(udev_enumerate); | |
352 | ||
353 | printf("enumerate 'not block'\n"); | |
354 | udev_enumerate = udev_enumerate_new(udev); | |
355 | if (udev_enumerate == NULL) | |
356 | return -1; | |
357 | udev_enumerate_add_nomatch_subsystem(udev_enumerate, "block"); | |
358 | udev_enumerate_scan_devices(udev_enumerate); | |
359 | test_enumerate_print_list(udev_enumerate); | |
360 | udev_enumerate_unref(udev_enumerate); | |
361 | ||
362 | printf("enumerate 'pci, mem, vc'\n"); | |
363 | udev_enumerate = udev_enumerate_new(udev); | |
364 | if (udev_enumerate == NULL) | |
365 | return -1; | |
366 | udev_enumerate_add_match_subsystem(udev_enumerate, "pci"); | |
367 | udev_enumerate_add_match_subsystem(udev_enumerate, "mem"); | |
368 | udev_enumerate_add_match_subsystem(udev_enumerate, "vc"); | |
369 | udev_enumerate_scan_devices(udev_enumerate); | |
370 | test_enumerate_print_list(udev_enumerate); | |
371 | udev_enumerate_unref(udev_enumerate); | |
372 | ||
373 | printf("enumerate 'subsystem'\n"); | |
374 | udev_enumerate = udev_enumerate_new(udev); | |
375 | if (udev_enumerate == NULL) | |
376 | return -1; | |
377 | udev_enumerate_scan_subsystems(udev_enumerate); | |
378 | test_enumerate_print_list(udev_enumerate); | |
379 | udev_enumerate_unref(udev_enumerate); | |
380 | ||
381 | printf("enumerate 'property IF_FS_*=filesystem'\n"); | |
382 | udev_enumerate = udev_enumerate_new(udev); | |
383 | if (udev_enumerate == NULL) | |
384 | return -1; | |
385 | udev_enumerate_add_match_property(udev_enumerate, "ID_FS*", "filesystem"); | |
386 | udev_enumerate_scan_devices(udev_enumerate); | |
387 | test_enumerate_print_list(udev_enumerate); | |
388 | udev_enumerate_unref(udev_enumerate); | |
389 | return 0; | |
90d80c2e KS |
390 | } |
391 | ||
872c8faa | 392 | static void test_hwdb(struct udev *udev, const char *modalias) { |
960787ae | 393 | struct udev_hwdb *hwdb; |
2001208c KS |
394 | struct udev_list_entry *entry; |
395 | ||
396 | hwdb = udev_hwdb_new(udev); | |
397 | ||
398 | udev_list_entry_foreach(entry, udev_hwdb_get_properties_list_entry(hwdb, modalias, 0)) | |
399 | printf("'%s'='%s'\n", udev_list_entry_get_name(entry), udev_list_entry_get_value(entry)); | |
400 | printf("\n"); | |
401 | ||
402 | hwdb = udev_hwdb_unref(hwdb); | |
bdf7026e | 403 | assert_se(hwdb == NULL); |
2001208c KS |
404 | } |
405 | ||
f168c273 | 406 | int main(int argc, char *argv[]) { |
912541b0 KS |
407 | struct udev *udev = NULL; |
408 | static const struct option options[] = { | |
409 | { "syspath", required_argument, NULL, 'p' }, | |
410 | { "subsystem", required_argument, NULL, 's' }, | |
411 | { "debug", no_argument, NULL, 'd' }, | |
412 | { "help", no_argument, NULL, 'h' }, | |
413 | { "version", no_argument, NULL, 'V' }, | |
414 | {} | |
415 | }; | |
416 | const char *syspath = "/devices/virtual/mem/null"; | |
417 | const char *subsystem = NULL; | |
418 | char path[1024]; | |
601185b4 | 419 | int c; |
912541b0 KS |
420 | |
421 | udev = udev_new(); | |
422 | printf("context: %p\n", udev); | |
423 | if (udev == NULL) { | |
424 | printf("no context\n"); | |
425 | return 1; | |
426 | } | |
912541b0 | 427 | |
601185b4 ZJS |
428 | while ((c = getopt_long(argc, argv, "p:s:dhV", options, NULL)) >= 0) |
429 | switch (c) { | |
912541b0 | 430 | |
912541b0 KS |
431 | case 'p': |
432 | syspath = optarg; | |
433 | break; | |
601185b4 | 434 | |
912541b0 KS |
435 | case 's': |
436 | subsystem = optarg; | |
437 | break; | |
601185b4 | 438 | |
912541b0 | 439 | case 'd': |
25e773ee KS |
440 | if (log_get_max_level() < LOG_INFO) |
441 | log_set_max_level(LOG_INFO); | |
912541b0 | 442 | break; |
601185b4 | 443 | |
912541b0 KS |
444 | case 'h': |
445 | printf("--debug --syspath= --subsystem= --help\n"); | |
446 | goto out; | |
601185b4 | 447 | |
912541b0 KS |
448 | case 'V': |
449 | printf("%s\n", VERSION); | |
450 | goto out; | |
601185b4 ZJS |
451 | |
452 | case '?': | |
912541b0 | 453 | goto out; |
601185b4 ZJS |
454 | |
455 | default: | |
456 | assert_not_reached("Unhandled option code."); | |
912541b0 | 457 | } |
601185b4 | 458 | |
912541b0 | 459 | |
912541b0 | 460 | /* add sys path if needed */ |
33502ffe | 461 | if (!startswith(syspath, "/sys")) { |
6ada823a | 462 | snprintf(path, sizeof(path), "/sys/%s", syspath); |
912541b0 KS |
463 | syspath = path; |
464 | } | |
465 | ||
466 | test_device(udev, syspath); | |
467 | test_device_devnum(udev); | |
468 | test_device_subsys_name(udev); | |
469 | test_device_parents(udev, syspath); | |
470 | ||
471 | test_enumerate(udev, subsystem); | |
472 | ||
473 | test_queue(udev); | |
474 | ||
2001208c KS |
475 | test_hwdb(udev, "usb:v0D50p0011*"); |
476 | ||
912541b0 | 477 | test_monitor(udev); |
b2d9e4f2 | 478 | out: |
912541b0 KS |
479 | udev_unref(udev); |
480 | return 0; | |
33a5cc29 | 481 | } |