]>
Commit | Line | Data |
---|---|---|
57fa1d09 TG |
1 | /*** |
2 | This file is part of systemd. | |
3 | ||
4 | Copyright 2008-2012 Kay Sievers <kay@vrfy.org> | |
5 | Copyright 2014 Tom Gundersen <teg@jklm.no> | |
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 | ***/ | |
20 | ||
21 | #include <ctype.h> | |
57fa1d09 | 22 | #include <net/if.h> |
07630cea | 23 | #include <sys/types.h> |
57fa1d09 | 24 | |
07630cea LP |
25 | #include "sd-device.h" |
26 | ||
b5efdb8a | 27 | #include "alloc-util.h" |
07630cea LP |
28 | #include "device-internal.h" |
29 | #include "device-private.h" | |
30 | #include "device-util.h" | |
3ffd4af2 | 31 | #include "fd-util.h" |
57fa1d09 | 32 | #include "fileio.h" |
f4f15635 | 33 | #include "fs-util.h" |
57fa1d09 | 34 | #include "hashmap.h" |
07630cea | 35 | #include "macro.h" |
6bedfcbb | 36 | #include "parse-util.h" |
07630cea | 37 | #include "path-util.h" |
57fa1d09 | 38 | #include "set.h" |
8fcde012 | 39 | #include "stat-util.h" |
07630cea | 40 | #include "string-util.h" |
57fa1d09 | 41 | #include "strv.h" |
07630cea LP |
42 | #include "strxcpyx.h" |
43 | #include "util.h" | |
57fa1d09 TG |
44 | |
45 | int device_new_aux(sd_device **ret) { | |
4afd3348 | 46 | _cleanup_(sd_device_unrefp) sd_device *device = NULL; |
57fa1d09 TG |
47 | |
48 | assert(ret); | |
49 | ||
50 | device = new0(sd_device, 1); | |
51 | if (!device) | |
52 | return -ENOMEM; | |
53 | ||
54 | device->n_ref = 1; | |
55 | device->watch_handle = -1; | |
56 | ||
57 | *ret = device; | |
58 | device = NULL; | |
59 | ||
60 | return 0; | |
61 | } | |
62 | ||
63 | _public_ sd_device *sd_device_ref(sd_device *device) { | |
64 | if (device) | |
65 | assert_se(++ device->n_ref >= 2); | |
66 | ||
67 | return device; | |
68 | } | |
69 | ||
70 | _public_ sd_device *sd_device_unref(sd_device *device) { | |
71 | if (device && -- device->n_ref == 0) { | |
72 | sd_device_unref(device->parent); | |
73 | free(device->syspath); | |
74 | free(device->sysname); | |
75 | free(device->devtype); | |
76 | free(device->devname); | |
77 | free(device->subsystem); | |
de7e983e | 78 | free(device->driver_subsystem); |
57fa1d09 TG |
79 | free(device->driver); |
80 | free(device->id_filename); | |
81 | free(device->properties_strv); | |
82 | free(device->properties_nulstr); | |
83 | ||
84 | ordered_hashmap_free_free_free(device->properties); | |
85 | ordered_hashmap_free_free_free(device->properties_db); | |
86 | hashmap_free_free_free(device->sysattr_values); | |
87 | set_free_free(device->sysattrs); | |
88 | set_free_free(device->tags); | |
89 | set_free_free(device->devlinks); | |
90 | ||
91 | free(device); | |
92 | } | |
93 | ||
94 | return NULL; | |
95 | } | |
96 | ||
97 | int device_add_property_aux(sd_device *device, const char *_key, const char *_value, bool db) { | |
98 | OrderedHashmap **properties; | |
99 | ||
100 | assert(device); | |
101 | assert(_key); | |
102 | ||
103 | if (db) | |
104 | properties = &device->properties_db; | |
105 | else | |
106 | properties = &device->properties; | |
107 | ||
108 | if (_value) { | |
109 | _cleanup_free_ char *key = NULL, *value = NULL, *old_key = NULL, *old_value = NULL; | |
110 | int r; | |
111 | ||
112 | r = ordered_hashmap_ensure_allocated(properties, &string_hash_ops); | |
113 | if (r < 0) | |
114 | return r; | |
115 | ||
116 | key = strdup(_key); | |
117 | if (!key) | |
118 | return -ENOMEM; | |
119 | ||
120 | value = strdup(_value); | |
121 | if (!value) | |
122 | return -ENOMEM; | |
123 | ||
124 | old_value = ordered_hashmap_get2(*properties, key, (void**) &old_key); | |
125 | ||
126 | r = ordered_hashmap_replace(*properties, key, value); | |
127 | if (r < 0) | |
128 | return r; | |
129 | ||
130 | key = NULL; | |
131 | value = NULL; | |
132 | } else { | |
133 | _cleanup_free_ char *key = NULL; | |
134 | _cleanup_free_ char *value = NULL; | |
135 | ||
136 | value = ordered_hashmap_remove2(*properties, _key, (void**) &key); | |
137 | } | |
138 | ||
139 | if (!db) { | |
313cefa1 | 140 | device->properties_generation++; |
57fa1d09 TG |
141 | device->properties_buf_outdated = true; |
142 | } | |
143 | ||
144 | return 0; | |
145 | } | |
146 | ||
147 | int device_add_property_internal(sd_device *device, const char *key, const char *value) { | |
148 | return device_add_property_aux(device, key, value, false); | |
149 | } | |
150 | ||
151 | int device_set_syspath(sd_device *device, const char *_syspath, bool verify) { | |
152 | _cleanup_free_ char *syspath = NULL; | |
153 | const char *devpath; | |
154 | int r; | |
155 | ||
156 | assert(device); | |
157 | assert(_syspath); | |
158 | ||
159 | /* must be a subdirectory of /sys */ | |
160 | if (!path_startswith(_syspath, "/sys/")) { | |
161 | log_debug("sd-device: syspath '%s' is not a subdirectory of /sys", _syspath); | |
162 | return -EINVAL; | |
163 | } | |
164 | ||
165 | if (verify) { | |
166 | r = readlink_and_canonicalize(_syspath, &syspath); | |
08232a02 TG |
167 | if (r == -ENOENT) |
168 | /* the device does not exist (any more?) */ | |
169 | return -ENODEV; | |
170 | else if (r == -EINVAL) { | |
57fa1d09 TG |
171 | /* not a symlink */ |
172 | syspath = canonicalize_file_name(_syspath); | |
173 | if (!syspath) { | |
08232a02 TG |
174 | if (errno == ENOENT) |
175 | /* the device does not exist (any more?) */ | |
176 | return -ENODEV; | |
177 | ||
e53fc357 | 178 | return log_debug_errno(errno, "sd-device: could not canonicalize '%s': %m", _syspath); |
57fa1d09 | 179 | } |
08232a02 | 180 | } else if (r < 0) { |
23446f01 | 181 | log_debug_errno(r, "sd-device: could not get target of '%s': %m", _syspath); |
57fa1d09 TG |
182 | return r; |
183 | } | |
184 | ||
185 | if (path_startswith(syspath, "/sys/devices/")) { | |
186 | char *path; | |
187 | ||
188 | /* all 'devices' require an 'uevent' file */ | |
189 | path = strjoina(syspath, "/uevent"); | |
190 | r = access(path, F_OK); | |
191 | if (r < 0) { | |
52d62901 TG |
192 | if (errno == ENOENT) |
193 | /* this is not a valid device */ | |
194 | return -ENODEV; | |
195 | ||
57fa1d09 TG |
196 | log_debug("sd-device: %s does not have an uevent file: %m", syspath); |
197 | return -errno; | |
198 | } | |
199 | } else { | |
200 | /* everything else just just needs to be a directory */ | |
52d62901 TG |
201 | if (!is_dir(syspath, false)) |
202 | return -ENODEV; | |
57fa1d09 TG |
203 | } |
204 | } else { | |
205 | syspath = strdup(_syspath); | |
206 | if (!syspath) | |
207 | return -ENOMEM; | |
208 | } | |
209 | ||
210 | devpath = syspath + strlen("/sys"); | |
211 | ||
212 | r = device_add_property_internal(device, "DEVPATH", devpath); | |
213 | if (r < 0) | |
214 | return r; | |
215 | ||
216 | free(device->syspath); | |
217 | device->syspath = syspath; | |
218 | syspath = NULL; | |
219 | ||
220 | device->devpath = devpath; | |
221 | ||
222 | return 0; | |
223 | } | |
224 | ||
225 | _public_ int sd_device_new_from_syspath(sd_device **ret, const char *syspath) { | |
4afd3348 | 226 | _cleanup_(sd_device_unrefp) sd_device *device = NULL; |
57fa1d09 TG |
227 | int r; |
228 | ||
229 | assert_return(ret, -EINVAL); | |
230 | assert_return(syspath, -EINVAL); | |
231 | ||
232 | r = device_new_aux(&device); | |
233 | if (r < 0) | |
234 | return r; | |
235 | ||
236 | r = device_set_syspath(device, syspath, true); | |
237 | if (r < 0) | |
238 | return r; | |
239 | ||
240 | *ret = device; | |
241 | device = NULL; | |
242 | ||
243 | return 0; | |
244 | } | |
245 | ||
246 | _public_ int sd_device_new_from_devnum(sd_device **ret, char type, dev_t devnum) { | |
247 | char *syspath; | |
248 | char id[DECIMAL_STR_MAX(unsigned) * 2 + 1]; | |
249 | ||
250 | assert_return(ret, -EINVAL); | |
251 | assert_return(type == 'b' || type == 'c', -EINVAL); | |
252 | ||
253 | /* use /sys/dev/{block,char}/<maj>:<min> link */ | |
254 | snprintf(id, sizeof(id), "%u:%u", major(devnum), minor(devnum)); | |
255 | ||
256 | syspath = strjoina("/sys/dev/", (type == 'b' ? "block" : "char"), "/", id); | |
257 | ||
258 | return sd_device_new_from_syspath(ret, syspath); | |
259 | } | |
260 | ||
261 | _public_ int sd_device_new_from_subsystem_sysname(sd_device **ret, const char *subsystem, const char *sysname) { | |
262 | char *syspath; | |
263 | ||
264 | assert_return(ret, -EINVAL); | |
265 | assert_return(subsystem, -EINVAL); | |
266 | assert_return(sysname, -EINVAL); | |
267 | ||
268 | if (streq(subsystem, "subsystem")) { | |
269 | syspath = strjoina("/sys/subsystem/", sysname); | |
270 | if (access(syspath, F_OK) >= 0) | |
271 | return sd_device_new_from_syspath(ret, syspath); | |
272 | ||
273 | syspath = strjoina("/sys/bus/", sysname); | |
274 | if (access(syspath, F_OK) >= 0) | |
275 | return sd_device_new_from_syspath(ret, syspath); | |
276 | ||
277 | syspath = strjoina("/sys/class/", sysname); | |
278 | if (access(syspath, F_OK) >= 0) | |
279 | return sd_device_new_from_syspath(ret, syspath); | |
280 | } else if (streq(subsystem, "module")) { | |
281 | syspath = strjoina("/sys/module/", sysname); | |
282 | if (access(syspath, F_OK) >= 0) | |
283 | return sd_device_new_from_syspath(ret, syspath); | |
284 | } else if (streq(subsystem, "drivers")) { | |
285 | char subsys[PATH_MAX]; | |
286 | char *driver; | |
287 | ||
288 | strscpy(subsys, sizeof(subsys), sysname); | |
289 | driver = strchr(subsys, ':'); | |
290 | if (driver) { | |
291 | driver[0] = '\0'; | |
292 | driver++; | |
293 | ||
294 | syspath = strjoina("/sys/subsystem/", subsys, "/drivers/", driver); | |
295 | if (access(syspath, F_OK) >= 0) | |
296 | return sd_device_new_from_syspath(ret, syspath); | |
297 | ||
298 | syspath = strjoina("/sys/bus/", subsys, "/drivers/", driver); | |
299 | if (access(syspath, F_OK) >= 0) | |
300 | return sd_device_new_from_syspath(ret, syspath); | |
301 | } else | |
302 | return -EINVAL; | |
303 | } else { | |
a9ec9f29 KS |
304 | char *name; |
305 | size_t len = 0; | |
306 | ||
307 | /* translate sysname back to sysfs filename */ | |
308 | name = strdupa(sysname); | |
309 | while (name[len] != '\0') { | |
310 | if (name[len] == '/') | |
311 | name[len] = '!'; | |
312 | ||
313cefa1 | 313 | len++; |
a9ec9f29 KS |
314 | } |
315 | ||
316 | syspath = strjoina("/sys/subsystem/", subsystem, "/devices/", name); | |
57fa1d09 TG |
317 | if (access(syspath, F_OK) >= 0) |
318 | return sd_device_new_from_syspath(ret, syspath); | |
319 | ||
a9ec9f29 | 320 | syspath = strjoina("/sys/bus/", subsystem, "/devices/", name); |
57fa1d09 TG |
321 | if (access(syspath, F_OK) >= 0) |
322 | return sd_device_new_from_syspath(ret, syspath); | |
323 | ||
a9ec9f29 | 324 | syspath = strjoina("/sys/class/", subsystem, "/", name); |
57fa1d09 TG |
325 | if (access(syspath, F_OK) >= 0) |
326 | return sd_device_new_from_syspath(ret, syspath); | |
327 | } | |
328 | ||
08232a02 | 329 | return -ENODEV; |
57fa1d09 TG |
330 | } |
331 | ||
332 | int device_set_devtype(sd_device *device, const char *_devtype) { | |
333 | _cleanup_free_ char *devtype = NULL; | |
334 | int r; | |
335 | ||
336 | assert(device); | |
337 | assert(_devtype); | |
338 | ||
339 | devtype = strdup(_devtype); | |
340 | if (!devtype) | |
341 | return -ENOMEM; | |
342 | ||
343 | r = device_add_property_internal(device, "DEVTYPE", devtype); | |
344 | if (r < 0) | |
345 | return r; | |
346 | ||
347 | free(device->devtype); | |
348 | device->devtype = devtype; | |
349 | devtype = NULL; | |
350 | ||
351 | return 0; | |
352 | } | |
353 | ||
354 | int device_set_ifindex(sd_device *device, const char *_ifindex) { | |
355 | int ifindex, r; | |
356 | ||
357 | assert(device); | |
358 | assert(_ifindex); | |
359 | ||
6ad623a3 | 360 | r = parse_ifindex(_ifindex, &ifindex); |
57fa1d09 TG |
361 | if (r < 0) |
362 | return r; | |
363 | ||
57fa1d09 TG |
364 | r = device_add_property_internal(device, "IFINDEX", _ifindex); |
365 | if (r < 0) | |
366 | return r; | |
367 | ||
368 | device->ifindex = ifindex; | |
369 | ||
370 | return 0; | |
371 | } | |
372 | ||
373 | int device_set_devname(sd_device *device, const char *_devname) { | |
374 | _cleanup_free_ char *devname = NULL; | |
375 | int r; | |
376 | ||
377 | assert(device); | |
378 | assert(_devname); | |
379 | ||
380 | if (_devname[0] != '/') { | |
381 | r = asprintf(&devname, "/dev/%s", _devname); | |
382 | if (r < 0) | |
383 | return -ENOMEM; | |
384 | } else { | |
385 | devname = strdup(_devname); | |
386 | if (!devname) | |
387 | return -ENOMEM; | |
388 | } | |
389 | ||
390 | r = device_add_property_internal(device, "DEVNAME", devname); | |
391 | if (r < 0) | |
392 | return r; | |
393 | ||
394 | free(device->devname); | |
395 | device->devname = devname; | |
396 | devname = NULL; | |
397 | ||
398 | return 0; | |
399 | } | |
400 | ||
401 | int device_set_devmode(sd_device *device, const char *_devmode) { | |
402 | unsigned devmode; | |
403 | int r; | |
404 | ||
405 | assert(device); | |
406 | assert(_devmode); | |
407 | ||
408 | r = safe_atou(_devmode, &devmode); | |
409 | if (r < 0) | |
410 | return r; | |
411 | ||
412 | if (devmode > 07777) | |
413 | return -EINVAL; | |
414 | ||
415 | r = device_add_property_internal(device, "DEVMODE", _devmode); | |
416 | if (r < 0) | |
417 | return r; | |
418 | ||
419 | device->devmode = devmode; | |
420 | ||
421 | return 0; | |
422 | } | |
423 | ||
424 | int device_set_devnum(sd_device *device, const char *major, const char *minor) { | |
425 | unsigned maj = 0, min = 0; | |
426 | int r; | |
427 | ||
428 | assert(device); | |
429 | assert(major); | |
430 | ||
431 | r = safe_atou(major, &maj); | |
432 | if (r < 0) | |
433 | return r; | |
434 | if (!maj) | |
435 | return 0; | |
436 | ||
437 | if (minor) { | |
438 | r = safe_atou(minor, &min); | |
439 | if (r < 0) | |
440 | return r; | |
441 | } | |
442 | ||
443 | r = device_add_property_internal(device, "MAJOR", major); | |
444 | if (r < 0) | |
445 | return r; | |
446 | ||
447 | if (minor) { | |
448 | r = device_add_property_internal(device, "MINOR", minor); | |
449 | if (r < 0) | |
450 | return r; | |
451 | } | |
452 | ||
453 | device->devnum = makedev(maj, min); | |
454 | ||
455 | return 0; | |
456 | } | |
457 | ||
458 | static int handle_uevent_line(sd_device *device, const char *key, const char *value, const char **major, const char **minor) { | |
459 | int r; | |
460 | ||
461 | assert(device); | |
462 | assert(key); | |
463 | assert(value); | |
464 | assert(major); | |
465 | assert(minor); | |
466 | ||
467 | if (streq(key, "DEVTYPE")) { | |
468 | r = device_set_devtype(device, value); | |
469 | if (r < 0) | |
470 | return r; | |
471 | } else if (streq(key, "IFINDEX")) { | |
472 | r = device_set_ifindex(device, value); | |
473 | if (r < 0) | |
474 | return r; | |
475 | } else if (streq(key, "DEVNAME")) { | |
476 | r = device_set_devname(device, value); | |
477 | if (r < 0) | |
478 | return r; | |
479 | } else if (streq(key, "DEVMODE")) { | |
480 | r = device_set_devmode(device, value); | |
481 | if (r < 0) | |
482 | return r; | |
483 | } else if (streq(key, "MAJOR")) | |
484 | *major = value; | |
485 | else if (streq(key, "MINOR")) | |
486 | *minor = value; | |
487 | else { | |
488 | r = device_add_property_internal(device, key, value); | |
489 | if (r < 0) | |
490 | return r; | |
491 | } | |
492 | ||
493 | return 0; | |
494 | } | |
495 | ||
496 | int device_read_uevent_file(sd_device *device) { | |
497 | _cleanup_free_ char *uevent = NULL; | |
97c94b98 | 498 | const char *syspath, *key = NULL, *value = NULL, *major = NULL, *minor = NULL; |
57fa1d09 TG |
499 | char *path; |
500 | size_t uevent_len; | |
501 | unsigned i; | |
502 | int r; | |
503 | ||
504 | enum { | |
505 | PRE_KEY, | |
506 | KEY, | |
507 | PRE_VALUE, | |
508 | VALUE, | |
509 | INVALID_LINE, | |
510 | } state = PRE_KEY; | |
511 | ||
512 | assert(device); | |
513 | ||
514 | if (device->uevent_loaded || device->sealed) | |
515 | return 0; | |
516 | ||
7141e4f6 TG |
517 | device->uevent_loaded = true; |
518 | ||
57fa1d09 TG |
519 | r = sd_device_get_syspath(device, &syspath); |
520 | if (r < 0) | |
521 | return r; | |
522 | ||
523 | path = strjoina(syspath, "/uevent"); | |
524 | ||
525 | r = read_full_file(path, &uevent, &uevent_len); | |
bba06166 TG |
526 | if (r == -EACCES) |
527 | /* empty uevent files may be write-only */ | |
528 | return 0; | |
2a213740 TG |
529 | else if (r == -ENOENT) |
530 | /* some devices may not have uevent files, see set_syspath() */ | |
531 | return 0; | |
bba06166 | 532 | else if (r < 0) { |
e53fc357 | 533 | log_debug_errno(r, "sd-device: failed to read uevent file '%s': %m", path); |
57fa1d09 TG |
534 | return r; |
535 | } | |
536 | ||
755700bb | 537 | for (i = 0; i < uevent_len; i++) |
57fa1d09 TG |
538 | switch (state) { |
539 | case PRE_KEY: | |
540 | if (!strchr(NEWLINE, uevent[i])) { | |
541 | key = &uevent[i]; | |
542 | ||
543 | state = KEY; | |
544 | } | |
545 | ||
546 | break; | |
547 | case KEY: | |
548 | if (uevent[i] == '=') { | |
549 | uevent[i] = '\0'; | |
550 | ||
551 | state = PRE_VALUE; | |
552 | } else if (strchr(NEWLINE, uevent[i])) { | |
553 | uevent[i] = '\0'; | |
554 | log_debug("sd-device: ignoring invalid uevent line '%s'", key); | |
555 | ||
556 | state = PRE_KEY; | |
557 | } | |
558 | ||
559 | break; | |
560 | case PRE_VALUE: | |
561 | value = &uevent[i]; | |
57fa1d09 TG |
562 | state = VALUE; |
563 | ||
755700bb | 564 | /* fall through to handle empty property */ |
57fa1d09 TG |
565 | case VALUE: |
566 | if (strchr(NEWLINE, uevent[i])) { | |
567 | uevent[i] = '\0'; | |
568 | ||
569 | r = handle_uevent_line(device, key, value, &major, &minor); | |
570 | if (r < 0) | |
19c29853 | 571 | log_debug_errno(r, "sd-device: failed to handle uevent entry '%s=%s': %m", key, value); |
57fa1d09 TG |
572 | |
573 | state = PRE_KEY; | |
574 | } | |
575 | ||
576 | break; | |
577 | default: | |
578 | assert_not_reached("invalid state when parsing uevent file"); | |
579 | } | |
57fa1d09 TG |
580 | |
581 | if (major) { | |
582 | r = device_set_devnum(device, major, minor); | |
583 | if (r < 0) | |
23446f01 | 584 | log_debug_errno(r, "sd-device: could not set 'MAJOR=%s' or 'MINOR=%s' from '%s': %m", major, minor, path); |
57fa1d09 TG |
585 | } |
586 | ||
57fa1d09 TG |
587 | return 0; |
588 | } | |
589 | ||
590 | _public_ int sd_device_get_ifindex(sd_device *device, int *ifindex) { | |
591 | int r; | |
592 | ||
593 | assert_return(device, -EINVAL); | |
594 | assert_return(ifindex, -EINVAL); | |
595 | ||
596 | r = device_read_uevent_file(device); | |
597 | if (r < 0) | |
598 | return r; | |
599 | ||
600 | *ifindex = device->ifindex; | |
601 | ||
602 | return 0; | |
603 | } | |
604 | ||
605 | _public_ int sd_device_new_from_device_id(sd_device **ret, const char *id) { | |
606 | int r; | |
607 | ||
608 | assert_return(ret, -EINVAL); | |
609 | assert_return(id, -EINVAL); | |
610 | ||
611 | switch (id[0]) { | |
612 | case 'b': | |
613 | case 'c': | |
614 | { | |
615 | char type; | |
616 | int maj, min; | |
617 | ||
618 | r = sscanf(id, "%c%i:%i", &type, &maj, &min); | |
619 | if (r != 3) | |
620 | return -EINVAL; | |
621 | ||
622 | return sd_device_new_from_devnum(ret, type, makedev(maj, min)); | |
623 | } | |
624 | case 'n': | |
625 | { | |
4afd3348 | 626 | _cleanup_(sd_device_unrefp) sd_device *device = NULL; |
57fa1d09 TG |
627 | _cleanup_close_ int sk = -1; |
628 | struct ifreq ifr = {}; | |
629 | int ifindex; | |
630 | ||
6ad623a3 | 631 | r = parse_ifindex(&id[1], &ifr.ifr_ifindex); |
57fa1d09 TG |
632 | if (r < 0) |
633 | return r; | |
57fa1d09 TG |
634 | |
635 | sk = socket(PF_INET, SOCK_DGRAM, 0); | |
636 | if (sk < 0) | |
637 | return -errno; | |
638 | ||
639 | r = ioctl(sk, SIOCGIFNAME, &ifr); | |
640 | if (r < 0) | |
641 | return -errno; | |
642 | ||
643 | r = sd_device_new_from_subsystem_sysname(&device, "net", ifr.ifr_name); | |
644 | if (r < 0) | |
645 | return r; | |
646 | ||
647 | r = sd_device_get_ifindex(device, &ifindex); | |
648 | if (r < 0) | |
649 | return r; | |
650 | ||
08232a02 | 651 | /* this is racey, so we might end up with the wrong device */ |
57fa1d09 TG |
652 | if (ifr.ifr_ifindex != ifindex) |
653 | return -ENODEV; | |
654 | ||
655 | *ret = device; | |
656 | device = NULL; | |
657 | ||
658 | return 0; | |
659 | } | |
660 | case '+': | |
661 | { | |
662 | char subsys[PATH_MAX]; | |
663 | char *sysname; | |
664 | ||
665 | (void)strscpy(subsys, sizeof(subsys), id + 1); | |
666 | sysname = strchr(subsys, ':'); | |
667 | if (!sysname) | |
668 | return -EINVAL; | |
669 | ||
670 | sysname[0] = '\0'; | |
313cefa1 | 671 | sysname++; |
57fa1d09 TG |
672 | |
673 | return sd_device_new_from_subsystem_sysname(ret, subsys, sysname); | |
674 | } | |
675 | default: | |
676 | return -EINVAL; | |
677 | } | |
678 | } | |
679 | ||
680 | _public_ int sd_device_get_syspath(sd_device *device, const char **ret) { | |
681 | assert_return(device, -EINVAL); | |
682 | assert_return(ret, -EINVAL); | |
683 | ||
684 | assert(path_startswith(device->syspath, "/sys/")); | |
685 | ||
686 | *ret = device->syspath; | |
687 | ||
688 | return 0; | |
689 | } | |
690 | ||
691 | static int device_new_from_child(sd_device **ret, sd_device *child) { | |
692 | _cleanup_free_ char *path = NULL; | |
693 | const char *subdir, *syspath; | |
694 | int r; | |
695 | ||
696 | assert(ret); | |
697 | assert(child); | |
698 | ||
699 | r = sd_device_get_syspath(child, &syspath); | |
700 | if (r < 0) | |
701 | return r; | |
702 | ||
703 | path = strdup(syspath); | |
704 | if (!path) | |
705 | return -ENOMEM; | |
706 | subdir = path + strlen("/sys"); | |
707 | ||
708 | for (;;) { | |
709 | char *pos; | |
710 | ||
711 | pos = strrchr(subdir, '/'); | |
712 | if (!pos || pos < subdir + 2) | |
713 | break; | |
714 | ||
715 | *pos = '\0'; | |
716 | ||
717 | r = sd_device_new_from_syspath(ret, path); | |
718 | if (r < 0) | |
719 | continue; | |
720 | ||
721 | return 0; | |
722 | } | |
723 | ||
08232a02 | 724 | return -ENODEV; |
57fa1d09 TG |
725 | } |
726 | ||
727 | _public_ int sd_device_get_parent(sd_device *child, sd_device **ret) { | |
728 | ||
729 | assert_return(ret, -EINVAL); | |
730 | assert_return(child, -EINVAL); | |
731 | ||
732 | if (!child->parent_set) { | |
733 | child->parent_set = true; | |
734 | ||
735 | (void)device_new_from_child(&child->parent, child); | |
736 | } | |
737 | ||
738 | if (!child->parent) | |
739 | return -ENOENT; | |
740 | ||
741 | *ret = child->parent; | |
742 | ||
743 | return 0; | |
744 | } | |
745 | ||
746 | int device_set_subsystem(sd_device *device, const char *_subsystem) { | |
747 | _cleanup_free_ char *subsystem = NULL; | |
748 | int r; | |
749 | ||
750 | assert(device); | |
751 | assert(_subsystem); | |
752 | ||
753 | subsystem = strdup(_subsystem); | |
754 | if (!subsystem) | |
755 | return -ENOMEM; | |
756 | ||
757 | r = device_add_property_internal(device, "SUBSYSTEM", subsystem); | |
758 | if (r < 0) | |
759 | return r; | |
760 | ||
761 | free(device->subsystem); | |
762 | device->subsystem = subsystem; | |
763 | subsystem = NULL; | |
764 | ||
765 | device->subsystem_set = true; | |
766 | ||
767 | return 0; | |
768 | } | |
769 | ||
de7e983e TG |
770 | static int device_set_drivers_subsystem(sd_device *device, const char *_subsystem) { |
771 | _cleanup_free_ char *subsystem = NULL; | |
772 | int r; | |
773 | ||
774 | assert(device); | |
775 | assert(_subsystem); | |
776 | assert(*_subsystem); | |
777 | ||
778 | subsystem = strdup(_subsystem); | |
779 | if (!subsystem) | |
780 | return -ENOMEM; | |
781 | ||
782 | r = device_set_subsystem(device, "drivers"); | |
783 | if (r < 0) | |
784 | return r; | |
785 | ||
786 | free(device->driver_subsystem); | |
787 | device->driver_subsystem = subsystem; | |
788 | subsystem = NULL; | |
789 | ||
790 | return 0; | |
791 | } | |
792 | ||
57fa1d09 | 793 | _public_ int sd_device_get_subsystem(sd_device *device, const char **ret) { |
de7e983e TG |
794 | const char *syspath, *drivers = NULL; |
795 | int r; | |
796 | ||
57fa1d09 TG |
797 | assert_return(ret, -EINVAL); |
798 | assert_return(device, -EINVAL); | |
799 | ||
de7e983e TG |
800 | r = sd_device_get_syspath(device, &syspath); |
801 | if (r < 0) | |
802 | return r; | |
803 | ||
57fa1d09 TG |
804 | if (!device->subsystem_set) { |
805 | _cleanup_free_ char *subsystem = NULL; | |
57fa1d09 | 806 | char *path; |
57fa1d09 TG |
807 | |
808 | /* read 'subsystem' link */ | |
57fa1d09 TG |
809 | path = strjoina(syspath, "/subsystem"); |
810 | r = readlink_value(path, &subsystem); | |
811 | if (r >= 0) | |
812 | r = device_set_subsystem(device, subsystem); | |
813 | /* use implicit names */ | |
814 | else if (path_startswith(device->devpath, "/module/")) | |
815 | r = device_set_subsystem(device, "module"); | |
de7e983e TG |
816 | else if (!(drivers = strstr(syspath, "/drivers/")) && |
817 | (path_startswith(device->devpath, "/subsystem/") || | |
818 | path_startswith(device->devpath, "/class/") || | |
819 | path_startswith(device->devpath, "/bus/"))) | |
57fa1d09 | 820 | r = device_set_subsystem(device, "subsystem"); |
4189708a | 821 | if (r < 0 && r != -ENOENT) |
5a917c06 | 822 | return log_debug_errno(r, "sd-device: could not set subsystem for %s: %m", device->devpath); |
57fa1d09 TG |
823 | |
824 | device->subsystem_set = true; | |
de7e983e TG |
825 | } else if (!device->driver_subsystem_set) |
826 | drivers = strstr(syspath, "/drivers/"); | |
827 | ||
828 | if (!device->driver_subsystem_set) { | |
829 | if (drivers) { | |
830 | _cleanup_free_ char *subpath = NULL; | |
831 | ||
832 | subpath = strndup(syspath, drivers - syspath); | |
833 | if (!subpath) | |
834 | r = -ENOMEM; | |
835 | else { | |
836 | const char *subsys; | |
837 | ||
838 | subsys = strrchr(subpath, '/'); | |
839 | if (!subsys) | |
840 | r = -EINVAL; | |
841 | else | |
842 | r = device_set_drivers_subsystem(device, subsys + 1); | |
843 | } | |
844 | if (r < 0 && r != -ENOENT) | |
845 | return log_debug_errno(r, "sd-device: could not set subsystem for driver %s: %m", device->devpath); | |
846 | } | |
847 | ||
848 | device->driver_subsystem_set = true; | |
57fa1d09 TG |
849 | } |
850 | ||
bf4c113e DH |
851 | if (!device->subsystem) |
852 | return -ENOENT; | |
853 | ||
57fa1d09 TG |
854 | *ret = device->subsystem; |
855 | ||
856 | return 0; | |
857 | } | |
858 | ||
859 | _public_ int sd_device_get_devtype(sd_device *device, const char **devtype) { | |
860 | int r; | |
861 | ||
862 | assert(devtype); | |
863 | assert(device); | |
864 | ||
865 | r = device_read_uevent_file(device); | |
866 | if (r < 0) | |
867 | return r; | |
868 | ||
869 | *devtype = device->devtype; | |
870 | ||
871 | return 0; | |
872 | } | |
873 | ||
874 | _public_ int sd_device_get_parent_with_subsystem_devtype(sd_device *child, const char *subsystem, const char *devtype, sd_device **ret) { | |
875 | sd_device *parent = NULL; | |
876 | int r; | |
877 | ||
878 | assert_return(child, -EINVAL); | |
879 | assert_return(subsystem, -EINVAL); | |
880 | ||
881 | r = sd_device_get_parent(child, &parent); | |
882 | while (r >= 0) { | |
883 | const char *parent_subsystem = NULL; | |
884 | const char *parent_devtype = NULL; | |
885 | ||
886 | (void)sd_device_get_subsystem(parent, &parent_subsystem); | |
887 | if (streq_ptr(parent_subsystem, subsystem)) { | |
888 | if (!devtype) | |
889 | break; | |
890 | ||
891 | (void)sd_device_get_devtype(parent, &parent_devtype); | |
892 | if (streq_ptr(parent_devtype, devtype)) | |
893 | break; | |
894 | } | |
895 | r = sd_device_get_parent(parent, &parent); | |
896 | } | |
897 | ||
898 | if (r < 0) | |
899 | return r; | |
900 | ||
901 | *ret = parent; | |
902 | ||
903 | return 0; | |
904 | } | |
905 | ||
906 | _public_ int sd_device_get_devnum(sd_device *device, dev_t *devnum) { | |
907 | int r; | |
908 | ||
909 | assert_return(device, -EINVAL); | |
910 | assert_return(devnum, -EINVAL); | |
911 | ||
912 | r = device_read_uevent_file(device); | |
913 | if (r < 0) | |
914 | return r; | |
915 | ||
916 | *devnum = device->devnum; | |
917 | ||
918 | return 0; | |
919 | } | |
920 | ||
921 | int device_set_driver(sd_device *device, const char *_driver) { | |
922 | _cleanup_free_ char *driver = NULL; | |
923 | int r; | |
924 | ||
925 | assert(device); | |
926 | assert(_driver); | |
927 | ||
928 | driver = strdup(_driver); | |
929 | if (!driver) | |
930 | return -ENOMEM; | |
931 | ||
932 | r = device_add_property_internal(device, "DRIVER", driver); | |
933 | if (r < 0) | |
934 | return r; | |
935 | ||
936 | free(device->driver); | |
937 | device->driver = driver; | |
938 | driver = NULL; | |
939 | ||
940 | device->driver_set = true; | |
941 | ||
942 | return 0; | |
943 | } | |
944 | ||
945 | _public_ int sd_device_get_driver(sd_device *device, const char **ret) { | |
946 | assert_return(device, -EINVAL); | |
947 | assert_return(ret, -EINVAL); | |
948 | ||
949 | if (!device->driver_set) { | |
950 | _cleanup_free_ char *driver = NULL; | |
951 | const char *syspath; | |
952 | char *path; | |
953 | int r; | |
954 | ||
955 | r = sd_device_get_syspath(device, &syspath); | |
956 | if (r < 0) | |
957 | return r; | |
958 | ||
959 | path = strjoina(syspath, "/driver"); | |
960 | r = readlink_value(path, &driver); | |
961 | if (r >= 0) { | |
962 | r = device_set_driver(device, driver); | |
963 | if (r < 0) | |
7283a80d TG |
964 | return log_debug_errno(r, "sd-device: could not set driver for %s: %m", device->devpath); |
965 | } else if (r == -ENOENT) | |
966 | device->driver_set = true; | |
967 | else | |
968 | return log_debug_errno(r, "sd-device: could not set driver for %s: %m", device->devpath); | |
57fa1d09 TG |
969 | } |
970 | ||
bf4c113e DH |
971 | if (!device->driver) |
972 | return -ENOENT; | |
973 | ||
57fa1d09 TG |
974 | *ret = device->driver; |
975 | ||
976 | return 0; | |
977 | } | |
978 | ||
979 | _public_ int sd_device_get_devpath(sd_device *device, const char **devpath) { | |
980 | assert_return(device, -EINVAL); | |
981 | assert_return(devpath, -EINVAL); | |
982 | ||
983 | assert(device->devpath); | |
984 | assert(device->devpath[0] == '/'); | |
985 | ||
986 | *devpath = device->devpath; | |
987 | ||
988 | return 0; | |
989 | } | |
990 | ||
991 | _public_ int sd_device_get_devname(sd_device *device, const char **devname) { | |
992 | int r; | |
993 | ||
994 | assert_return(device, -EINVAL); | |
995 | assert_return(devname, -EINVAL); | |
996 | ||
997 | r = device_read_uevent_file(device); | |
998 | if (r < 0) | |
999 | return r; | |
1000 | ||
1001 | if (!device->devname) | |
1002 | return -ENOENT; | |
1003 | ||
1004 | assert(path_startswith(device->devname, "/dev/")); | |
1005 | ||
1006 | *devname = device->devname; | |
1007 | ||
1008 | return 0; | |
1009 | } | |
1010 | ||
1011 | static int device_set_sysname(sd_device *device) { | |
1012 | _cleanup_free_ char *sysname = NULL; | |
afcac065 | 1013 | const char *sysnum = NULL; |
57fa1d09 TG |
1014 | const char *pos; |
1015 | size_t len = 0; | |
1016 | ||
1017 | pos = strrchr(device->devpath, '/'); | |
1018 | if (!pos) | |
1019 | return -EINVAL; | |
313cefa1 | 1020 | pos++; |
57fa1d09 TG |
1021 | |
1022 | /* devpath is not a root directory */ | |
1023 | if (*pos == '\0' || pos <= device->devpath) | |
1024 | return -EINVAL; | |
1025 | ||
1026 | sysname = strdup(pos); | |
1027 | if (!sysname) | |
1028 | return -ENOMEM; | |
1029 | ||
1030 | /* some devices have '!' in their name, change that to '/' */ | |
1031 | while (sysname[len] != '\0') { | |
1032 | if (sysname[len] == '!') | |
1033 | sysname[len] = '/'; | |
1034 | ||
313cefa1 | 1035 | len++; |
57fa1d09 TG |
1036 | } |
1037 | ||
1038 | /* trailing number */ | |
1039 | while (len > 0 && isdigit(sysname[--len])) | |
1040 | sysnum = &sysname[len]; | |
1041 | ||
1042 | if (len == 0) | |
1043 | sysnum = NULL; | |
1044 | ||
1045 | free(device->sysname); | |
1046 | device->sysname = sysname; | |
1047 | sysname = NULL; | |
1048 | ||
1049 | device->sysnum = sysnum; | |
1050 | ||
1051 | device->sysname_set = true; | |
1052 | ||
1053 | return 0; | |
1054 | } | |
1055 | ||
1056 | _public_ int sd_device_get_sysname(sd_device *device, const char **ret) { | |
1057 | int r; | |
1058 | ||
1059 | assert_return(device, -EINVAL); | |
1060 | assert_return(ret, -EINVAL); | |
1061 | ||
1062 | if (!device->sysname_set) { | |
1063 | r = device_set_sysname(device); | |
1064 | if (r < 0) | |
1065 | return r; | |
1066 | } | |
1067 | ||
bf4c113e DH |
1068 | assert_return(device->sysname, -ENOENT); |
1069 | ||
57fa1d09 TG |
1070 | *ret = device->sysname; |
1071 | ||
1072 | return 0; | |
1073 | } | |
1074 | ||
1075 | _public_ int sd_device_get_sysnum(sd_device *device, const char **ret) { | |
1076 | int r; | |
1077 | ||
1078 | assert_return(device, -EINVAL); | |
1079 | assert_return(ret, -EINVAL); | |
1080 | ||
1081 | if (!device->sysname_set) { | |
1082 | r = device_set_sysname(device); | |
1083 | if (r < 0) | |
1084 | return r; | |
1085 | } | |
1086 | ||
1087 | *ret = device->sysnum; | |
1088 | ||
1089 | return 0; | |
1090 | } | |
1091 | ||
1092 | static bool is_valid_tag(const char *tag) { | |
1093 | assert(tag); | |
1094 | ||
1095 | return !strchr(tag, ':') && !strchr(tag, ' '); | |
1096 | } | |
1097 | ||
1098 | int device_add_tag(sd_device *device, const char *tag) { | |
1099 | int r; | |
1100 | ||
1101 | assert(device); | |
1102 | assert(tag); | |
1103 | ||
1104 | if (!is_valid_tag(tag)) | |
1105 | return -EINVAL; | |
1106 | ||
1107 | r = set_ensure_allocated(&device->tags, &string_hash_ops); | |
1108 | if (r < 0) | |
1109 | return r; | |
1110 | ||
1111 | r = set_put_strdup(device->tags, tag); | |
1112 | if (r < 0) | |
1113 | return r; | |
1114 | ||
313cefa1 | 1115 | device->tags_generation++; |
57fa1d09 TG |
1116 | device->property_tags_outdated = true; |
1117 | ||
1118 | return 0; | |
1119 | } | |
1120 | ||
1121 | int device_add_devlink(sd_device *device, const char *devlink) { | |
1122 | int r; | |
1123 | ||
1124 | assert(device); | |
1125 | assert(devlink); | |
1126 | ||
1127 | r = set_ensure_allocated(&device->devlinks, &string_hash_ops); | |
1128 | if (r < 0) | |
1129 | return r; | |
1130 | ||
1131 | r = set_put_strdup(device->devlinks, devlink); | |
1132 | if (r < 0) | |
1133 | return r; | |
1134 | ||
313cefa1 | 1135 | device->devlinks_generation++; |
57fa1d09 TG |
1136 | device->property_devlinks_outdated = true; |
1137 | ||
1138 | return 0; | |
1139 | } | |
1140 | ||
1141 | static int device_add_property_internal_from_string(sd_device *device, const char *str) { | |
1142 | _cleanup_free_ char *key = NULL; | |
1143 | char *value; | |
1144 | ||
1145 | assert(device); | |
1146 | assert(str); | |
1147 | ||
1148 | key = strdup(str); | |
1149 | if (!key) | |
1150 | return -ENOMEM; | |
1151 | ||
1152 | value = strchr(key, '='); | |
1153 | if (!value) | |
1154 | return -EINVAL; | |
1155 | ||
1156 | *value = '\0'; | |
1157 | ||
1158 | if (isempty(++value)) | |
1159 | value = NULL; | |
1160 | ||
1161 | return device_add_property_internal(device, key, value); | |
1162 | } | |
1163 | ||
1164 | int device_set_usec_initialized(sd_device *device, const char *initialized) { | |
1165 | uint64_t usec_initialized; | |
1166 | int r; | |
1167 | ||
1168 | assert(device); | |
1169 | assert(initialized); | |
1170 | ||
1171 | r = safe_atou64(initialized, &usec_initialized); | |
1172 | if (r < 0) | |
1173 | return r; | |
1174 | ||
1175 | r = device_add_property_internal(device, "USEC_INITIALIZED", initialized); | |
1176 | if (r < 0) | |
1177 | return r; | |
1178 | ||
1179 | device->usec_initialized = usec_initialized; | |
1180 | ||
1181 | return 0; | |
1182 | } | |
1183 | ||
1184 | static int handle_db_line(sd_device *device, char key, const char *value) { | |
1185 | char *path; | |
1186 | int r; | |
1187 | ||
1188 | assert(device); | |
1189 | assert(value); | |
1190 | ||
1191 | switch (key) { | |
1192 | case 'G': | |
1193 | r = device_add_tag(device, value); | |
1194 | if (r < 0) | |
1195 | return r; | |
1196 | ||
1197 | break; | |
1198 | case 'S': | |
1199 | path = strjoina("/dev/", value); | |
1200 | r = device_add_devlink(device, path); | |
1201 | if (r < 0) | |
1202 | return r; | |
1203 | ||
1204 | break; | |
1205 | case 'E': | |
1206 | r = device_add_property_internal_from_string(device, value); | |
1207 | if (r < 0) | |
1208 | return r; | |
1209 | ||
1210 | break; | |
1211 | case 'I': | |
1212 | r = device_set_usec_initialized(device, value); | |
1213 | if (r < 0) | |
1214 | return r; | |
1215 | ||
1216 | break; | |
1217 | case 'L': | |
1218 | r = safe_atoi(value, &device->devlink_priority); | |
1219 | if (r < 0) | |
1220 | return r; | |
1221 | ||
1222 | break; | |
1223 | case 'W': | |
1224 | r = safe_atoi(value, &device->watch_handle); | |
1225 | if (r < 0) | |
1226 | return r; | |
1227 | ||
1228 | break; | |
1229 | default: | |
1230 | log_debug("device db: unknown key '%c'", key); | |
1231 | } | |
1232 | ||
1233 | return 0; | |
1234 | } | |
1235 | ||
1236 | int device_get_id_filename(sd_device *device, const char **ret) { | |
1237 | assert(device); | |
1238 | assert(ret); | |
1239 | ||
1240 | if (!device->id_filename) { | |
1241 | _cleanup_free_ char *id = NULL; | |
1242 | const char *subsystem; | |
1243 | dev_t devnum; | |
1244 | int ifindex, r; | |
1245 | ||
1246 | r = sd_device_get_subsystem(device, &subsystem); | |
1247 | if (r < 0) | |
1248 | return r; | |
1249 | ||
1250 | r = sd_device_get_devnum(device, &devnum); | |
1251 | if (r < 0) | |
1252 | return r; | |
1253 | ||
1254 | r = sd_device_get_ifindex(device, &ifindex); | |
1255 | if (r < 0) | |
1256 | return r; | |
1257 | ||
1258 | if (major(devnum) > 0) { | |
4189708a TG |
1259 | assert(subsystem); |
1260 | ||
ccddd104 | 1261 | /* use dev_t — b259:131072, c254:0 */ |
57fa1d09 TG |
1262 | r = asprintf(&id, "%c%u:%u", |
1263 | streq(subsystem, "block") ? 'b' : 'c', | |
1264 | major(devnum), minor(devnum)); | |
1265 | if (r < 0) | |
53fae771 | 1266 | return -ENOMEM; |
57fa1d09 | 1267 | } else if (ifindex > 0) { |
ccddd104 | 1268 | /* use netdev ifindex — n3 */ |
57fa1d09 TG |
1269 | r = asprintf(&id, "n%u", ifindex); |
1270 | if (r < 0) | |
53fae771 | 1271 | return -ENOMEM; |
57fa1d09 | 1272 | } else { |
ccddd104 | 1273 | /* use $subsys:$sysname — pci:0000:00:1f.2 |
57fa1d09 TG |
1274 | * sysname() has '!' translated, get it from devpath |
1275 | */ | |
1276 | const char *sysname; | |
1277 | ||
1278 | sysname = basename(device->devpath); | |
1279 | if (!sysname) | |
4189708a TG |
1280 | return -EINVAL; |
1281 | ||
1282 | if (!subsystem) | |
57fa1d09 TG |
1283 | return -EINVAL; |
1284 | ||
de7e983e TG |
1285 | if (streq(subsystem, "drivers")) { |
1286 | /* the 'drivers' pseudo-subsystem is special, and needs the real subsystem | |
1287 | * encoded as well */ | |
1288 | r = asprintf(&id, "+drivers:%s:%s", device->driver_subsystem, sysname); | |
1289 | if (r < 0) | |
1290 | return -ENOMEM; | |
1291 | } else { | |
1292 | r = asprintf(&id, "+%s:%s", subsystem, sysname); | |
1293 | if (r < 0) | |
1294 | return -ENOMEM; | |
1295 | } | |
57fa1d09 TG |
1296 | } |
1297 | ||
1298 | device->id_filename = id; | |
1299 | id = NULL; | |
1300 | } | |
1301 | ||
1302 | *ret = device->id_filename; | |
1303 | ||
1304 | return 0; | |
1305 | } | |
1306 | ||
107f2e25 | 1307 | int device_read_db_aux(sd_device *device, bool force) { |
57fa1d09 TG |
1308 | _cleanup_free_ char *db = NULL; |
1309 | char *path; | |
1310 | const char *id, *value; | |
1311 | char key; | |
1312 | size_t db_len; | |
1313 | unsigned i; | |
1314 | int r; | |
1315 | ||
1316 | enum { | |
1317 | PRE_KEY, | |
1318 | KEY, | |
1319 | PRE_VALUE, | |
1320 | VALUE, | |
1321 | INVALID_LINE, | |
1322 | } state = PRE_KEY; | |
1323 | ||
107f2e25 | 1324 | if (device->db_loaded || (!force && device->sealed)) |
57fa1d09 TG |
1325 | return 0; |
1326 | ||
7141e4f6 TG |
1327 | device->db_loaded = true; |
1328 | ||
57fa1d09 TG |
1329 | r = device_get_id_filename(device, &id); |
1330 | if (r < 0) | |
1331 | return r; | |
1332 | ||
1333 | path = strjoina("/run/udev/data/", id); | |
1334 | ||
1335 | r = read_full_file(path, &db, &db_len); | |
1336 | if (r < 0) { | |
1337 | if (r == -ENOENT) | |
1338 | return 0; | |
e53fc357 LP |
1339 | else |
1340 | return log_debug_errno(r, "sd-device: failed to read db '%s': %m", path); | |
57fa1d09 TG |
1341 | } |
1342 | ||
1343 | /* devices with a database entry are initialized */ | |
7e518afa | 1344 | device->is_initialized = true; |
57fa1d09 TG |
1345 | |
1346 | for (i = 0; i < db_len; i++) { | |
1347 | switch (state) { | |
1348 | case PRE_KEY: | |
1349 | if (!strchr(NEWLINE, db[i])) { | |
1350 | key = db[i]; | |
1351 | ||
1352 | state = KEY; | |
1353 | } | |
1354 | ||
1355 | break; | |
1356 | case KEY: | |
1357 | if (db[i] != ':') { | |
1358 | log_debug("sd-device: ignoring invalid db entry with key '%c'", key); | |
1359 | ||
1360 | state = INVALID_LINE; | |
1361 | } else { | |
1362 | db[i] = '\0'; | |
1363 | ||
1364 | state = PRE_VALUE; | |
1365 | } | |
1366 | ||
1367 | break; | |
1368 | case PRE_VALUE: | |
1369 | value = &db[i]; | |
1370 | ||
1371 | state = VALUE; | |
1372 | ||
1373 | break; | |
1374 | case INVALID_LINE: | |
1375 | if (strchr(NEWLINE, db[i])) | |
1376 | state = PRE_KEY; | |
1377 | ||
1378 | break; | |
1379 | case VALUE: | |
1380 | if (strchr(NEWLINE, db[i])) { | |
1381 | db[i] = '\0'; | |
1382 | r = handle_db_line(device, key, value); | |
1383 | if (r < 0) | |
19c29853 | 1384 | log_debug_errno(r, "sd-device: failed to handle db entry '%c:%s': %m", key, value); |
57fa1d09 TG |
1385 | |
1386 | state = PRE_KEY; | |
1387 | } | |
1388 | ||
1389 | break; | |
1390 | default: | |
1391 | assert_not_reached("invalid state when parsing db"); | |
1392 | } | |
1393 | } | |
1394 | ||
57fa1d09 TG |
1395 | return 0; |
1396 | } | |
1397 | ||
107f2e25 TG |
1398 | static int device_read_db(sd_device *device) { |
1399 | return device_read_db_aux(device, false); | |
1400 | } | |
1401 | ||
57fa1d09 TG |
1402 | _public_ int sd_device_get_is_initialized(sd_device *device, int *initialized) { |
1403 | int r; | |
1404 | ||
1405 | assert_return(device, -EINVAL); | |
1406 | assert_return(initialized, -EINVAL); | |
1407 | ||
1408 | r = device_read_db(device); | |
1409 | if (r < 0) | |
1410 | return r; | |
1411 | ||
1412 | *initialized = device->is_initialized; | |
1413 | ||
1414 | return 0; | |
1415 | } | |
1416 | ||
1417 | _public_ int sd_device_get_usec_since_initialized(sd_device *device, uint64_t *usec) { | |
1418 | usec_t now_ts; | |
1419 | int r; | |
1420 | ||
1421 | assert_return(device, -EINVAL); | |
1422 | assert_return(usec, -EINVAL); | |
1423 | ||
1424 | r = device_read_db(device); | |
1425 | if (r < 0) | |
1426 | return r; | |
1427 | ||
1428 | if (!device->is_initialized) | |
1429 | return -EBUSY; | |
1430 | ||
1431 | if (!device->usec_initialized) | |
1432 | return -ENODATA; | |
1433 | ||
1434 | now_ts = now(clock_boottime_or_monotonic()); | |
1435 | ||
1436 | if (now_ts < device->usec_initialized) | |
1437 | return -EIO; | |
1438 | ||
1439 | *usec = now_ts - device->usec_initialized; | |
1440 | ||
1441 | return 0; | |
1442 | } | |
1443 | ||
1444 | _public_ const char *sd_device_get_tag_first(sd_device *device) { | |
8927b1da DH |
1445 | void *v; |
1446 | ||
57fa1d09 TG |
1447 | assert_return(device, NULL); |
1448 | ||
1449 | (void) device_read_db(device); | |
1450 | ||
1451 | device->tags_iterator_generation = device->tags_generation; | |
1452 | device->tags_iterator = ITERATOR_FIRST; | |
1453 | ||
bccfe92e | 1454 | (void) set_iterate(device->tags, &device->tags_iterator, &v); |
8927b1da | 1455 | return v; |
57fa1d09 TG |
1456 | } |
1457 | ||
1458 | _public_ const char *sd_device_get_tag_next(sd_device *device) { | |
8927b1da DH |
1459 | void *v; |
1460 | ||
57fa1d09 TG |
1461 | assert_return(device, NULL); |
1462 | ||
1463 | (void) device_read_db(device); | |
1464 | ||
1465 | if (device->tags_iterator_generation != device->tags_generation) | |
1466 | return NULL; | |
1467 | ||
bccfe92e | 1468 | (void) set_iterate(device->tags, &device->tags_iterator, &v); |
8927b1da | 1469 | return v; |
57fa1d09 TG |
1470 | } |
1471 | ||
1472 | _public_ const char *sd_device_get_devlink_first(sd_device *device) { | |
8927b1da DH |
1473 | void *v; |
1474 | ||
57fa1d09 TG |
1475 | assert_return(device, NULL); |
1476 | ||
1477 | (void) device_read_db(device); | |
1478 | ||
1479 | device->devlinks_iterator_generation = device->devlinks_generation; | |
1480 | device->devlinks_iterator = ITERATOR_FIRST; | |
1481 | ||
bccfe92e | 1482 | (void) set_iterate(device->devlinks, &device->devlinks_iterator, &v); |
8927b1da | 1483 | return v; |
57fa1d09 TG |
1484 | } |
1485 | ||
1486 | _public_ const char *sd_device_get_devlink_next(sd_device *device) { | |
8927b1da DH |
1487 | void *v; |
1488 | ||
57fa1d09 TG |
1489 | assert_return(device, NULL); |
1490 | ||
1491 | (void) device_read_db(device); | |
1492 | ||
1493 | if (device->devlinks_iterator_generation != device->devlinks_generation) | |
1494 | return NULL; | |
1495 | ||
bccfe92e | 1496 | (void) set_iterate(device->devlinks, &device->devlinks_iterator, &v); |
8927b1da | 1497 | return v; |
57fa1d09 TG |
1498 | } |
1499 | ||
1500 | static int device_properties_prepare(sd_device *device) { | |
1501 | int r; | |
1502 | ||
1503 | assert(device); | |
1504 | ||
1505 | r = device_read_uevent_file(device); | |
1506 | if (r < 0) | |
1507 | return r; | |
1508 | ||
1509 | r = device_read_db(device); | |
1510 | if (r < 0) | |
1511 | return r; | |
1512 | ||
1513 | if (device->property_devlinks_outdated) { | |
1d88a271 MP |
1514 | _cleanup_free_ char *devlinks = NULL; |
1515 | size_t devlinks_allocated = 0, devlinks_len = 0; | |
57fa1d09 TG |
1516 | const char *devlink; |
1517 | ||
1d88a271 MP |
1518 | for (devlink = sd_device_get_devlink_first(device); devlink; devlink = sd_device_get_devlink_next(device)) { |
1519 | char *e; | |
57fa1d09 | 1520 | |
1d88a271 MP |
1521 | if (!GREEDY_REALLOC(devlinks, devlinks_allocated, devlinks_len + strlen(devlink) + 2)) |
1522 | return -ENOMEM; | |
1523 | if (devlinks_len > 0) | |
1524 | stpcpy(devlinks + devlinks_len++, " "); | |
1525 | e = stpcpy(devlinks + devlinks_len, devlink); | |
1526 | devlinks_len = e - devlinks; | |
1527 | } | |
57fa1d09 TG |
1528 | |
1529 | r = device_add_property_internal(device, "DEVLINKS", devlinks); | |
1530 | if (r < 0) | |
1531 | return r; | |
1532 | ||
1533 | device->property_devlinks_outdated = false; | |
1534 | } | |
1535 | ||
1536 | if (device->property_tags_outdated) { | |
1d88a271 MP |
1537 | _cleanup_free_ char *tags = NULL; |
1538 | size_t tags_allocated = 0, tags_len = 0; | |
57fa1d09 TG |
1539 | const char *tag; |
1540 | ||
1d88a271 MP |
1541 | if (!GREEDY_REALLOC(tags, tags_allocated, 2)) |
1542 | return -ENOMEM; | |
1543 | stpcpy(tags, ":"); | |
1544 | tags_len++; | |
57fa1d09 | 1545 | |
1d88a271 MP |
1546 | for (tag = sd_device_get_tag_first(device); tag; tag = sd_device_get_tag_next(device)) { |
1547 | char *e; | |
57fa1d09 | 1548 | |
817ec8cc | 1549 | if (!GREEDY_REALLOC(tags, tags_allocated, tags_len + strlen(tag) + 2)) |
1d88a271 MP |
1550 | return -ENOMEM; |
1551 | e = stpcpy(stpcpy(tags + tags_len, tag), ":"); | |
1552 | tags_len = e - tags; | |
1553 | } | |
57fa1d09 TG |
1554 | |
1555 | r = device_add_property_internal(device, "TAGS", tags); | |
1556 | if (r < 0) | |
1557 | return r; | |
1558 | ||
1559 | device->property_tags_outdated = false; | |
1560 | } | |
1561 | ||
1562 | return 0; | |
1563 | } | |
1564 | ||
1565 | _public_ const char *sd_device_get_property_first(sd_device *device, const char **_value) { | |
1566 | const char *key; | |
1567 | const char *value; | |
1568 | int r; | |
1569 | ||
1570 | assert_return(device, NULL); | |
1571 | ||
1572 | r = device_properties_prepare(device); | |
1573 | if (r < 0) | |
1574 | return NULL; | |
1575 | ||
1576 | device->properties_iterator_generation = device->properties_generation; | |
1577 | device->properties_iterator = ITERATOR_FIRST; | |
1578 | ||
8927b1da | 1579 | ordered_hashmap_iterate(device->properties, &device->properties_iterator, (void**)&value, (const void**)&key); |
57fa1d09 TG |
1580 | |
1581 | if (_value) | |
1582 | *_value = value; | |
1583 | ||
1584 | return key; | |
1585 | } | |
1586 | ||
1587 | _public_ const char *sd_device_get_property_next(sd_device *device, const char **_value) { | |
1588 | const char *key; | |
1589 | const char *value; | |
1590 | int r; | |
1591 | ||
1592 | assert_return(device, NULL); | |
1593 | ||
1594 | r = device_properties_prepare(device); | |
1595 | if (r < 0) | |
1596 | return NULL; | |
1597 | ||
1598 | if (device->properties_iterator_generation != device->properties_generation) | |
1599 | return NULL; | |
1600 | ||
8927b1da | 1601 | ordered_hashmap_iterate(device->properties, &device->properties_iterator, (void**)&value, (const void**)&key); |
57fa1d09 TG |
1602 | |
1603 | if (_value) | |
1604 | *_value = value; | |
1605 | ||
1606 | return key; | |
1607 | } | |
1608 | ||
1609 | static int device_sysattrs_read_all(sd_device *device) { | |
1610 | _cleanup_closedir_ DIR *dir = NULL; | |
1611 | const char *syspath; | |
1612 | struct dirent *dent; | |
1613 | int r; | |
1614 | ||
1615 | assert(device); | |
1616 | ||
1617 | if (device->sysattrs_read) | |
1618 | return 0; | |
1619 | ||
1620 | r = sd_device_get_syspath(device, &syspath); | |
1621 | if (r < 0) | |
1622 | return r; | |
1623 | ||
1624 | dir = opendir(syspath); | |
1625 | if (!dir) | |
1626 | return -errno; | |
1627 | ||
1628 | r = set_ensure_allocated(&device->sysattrs, &string_hash_ops); | |
1629 | if (r < 0) | |
1630 | return r; | |
1631 | ||
1632 | for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) { | |
1633 | char *path; | |
1634 | struct stat statbuf; | |
1635 | ||
1636 | /* only handle symlinks and regular files */ | |
1637 | if (dent->d_type != DT_LNK && dent->d_type != DT_REG) | |
1638 | continue; | |
1639 | ||
1640 | path = strjoina(syspath, "/", dent->d_name); | |
1641 | ||
1642 | if (lstat(path, &statbuf) != 0) | |
1643 | continue; | |
1644 | ||
1645 | if (!(statbuf.st_mode & S_IRUSR)) | |
1646 | continue; | |
1647 | ||
1648 | r = set_put_strdup(device->sysattrs, dent->d_name); | |
1649 | if (r < 0) | |
1650 | return r; | |
1651 | } | |
1652 | ||
1653 | device->sysattrs_read = true; | |
1654 | ||
1655 | return 0; | |
1656 | } | |
1657 | ||
1658 | _public_ const char *sd_device_get_sysattr_first(sd_device *device) { | |
8927b1da | 1659 | void *v; |
57fa1d09 TG |
1660 | int r; |
1661 | ||
1662 | assert_return(device, NULL); | |
1663 | ||
1664 | if (!device->sysattrs_read) { | |
1665 | r = device_sysattrs_read_all(device); | |
1666 | if (r < 0) { | |
1667 | errno = -r; | |
1668 | return NULL; | |
1669 | } | |
1670 | } | |
1671 | ||
1672 | device->sysattrs_iterator = ITERATOR_FIRST; | |
1673 | ||
bccfe92e | 1674 | (void) set_iterate(device->sysattrs, &device->sysattrs_iterator, &v); |
8927b1da | 1675 | return v; |
57fa1d09 TG |
1676 | } |
1677 | ||
1678 | _public_ const char *sd_device_get_sysattr_next(sd_device *device) { | |
8927b1da DH |
1679 | void *v; |
1680 | ||
57fa1d09 TG |
1681 | assert_return(device, NULL); |
1682 | ||
1683 | if (!device->sysattrs_read) | |
1684 | return NULL; | |
1685 | ||
bccfe92e | 1686 | (void) set_iterate(device->sysattrs, &device->sysattrs_iterator, &v); |
8927b1da | 1687 | return v; |
57fa1d09 TG |
1688 | } |
1689 | ||
1690 | _public_ int sd_device_has_tag(sd_device *device, const char *tag) { | |
1691 | assert_return(device, -EINVAL); | |
1692 | assert_return(tag, -EINVAL); | |
1693 | ||
1694 | (void) device_read_db(device); | |
1695 | ||
1696 | return !!set_contains(device->tags, tag); | |
1697 | } | |
1698 | ||
1699 | _public_ int sd_device_get_property_value(sd_device *device, const char *key, const char **_value) { | |
1700 | char *value; | |
1701 | int r; | |
1702 | ||
1703 | assert_return(device, -EINVAL); | |
1704 | assert_return(key, -EINVAL); | |
1705 | assert_return(_value, -EINVAL); | |
1706 | ||
1707 | r = device_properties_prepare(device); | |
1708 | if (r < 0) | |
1709 | return r; | |
1710 | ||
1711 | value = ordered_hashmap_get(device->properties, key); | |
1712 | if (!value) | |
1713 | return -ENOENT; | |
1714 | ||
1715 | *_value = value; | |
1716 | ||
1717 | return 0; | |
1718 | } | |
1719 | ||
1720 | /* replaces the value if it already exists */ | |
2fe29a46 | 1721 | static int device_add_sysattr_value(sd_device *device, const char *_key, char *value) { |
57fa1d09 | 1722 | _cleanup_free_ char *key = NULL; |
2fe29a46 | 1723 | _cleanup_free_ char *value_old = NULL; |
57fa1d09 TG |
1724 | int r; |
1725 | ||
1726 | assert(device); | |
1727 | assert(_key); | |
1728 | ||
1729 | r = hashmap_ensure_allocated(&device->sysattr_values, &string_hash_ops); | |
1730 | if (r < 0) | |
1731 | return r; | |
1732 | ||
2fe29a46 | 1733 | value_old = hashmap_remove2(device->sysattr_values, _key, (void **)&key); |
57fa1d09 TG |
1734 | if (!key) { |
1735 | key = strdup(_key); | |
1736 | if (!key) | |
1737 | return -ENOMEM; | |
1738 | } | |
1739 | ||
57fa1d09 TG |
1740 | r = hashmap_put(device->sysattr_values, key, value); |
1741 | if (r < 0) | |
1742 | return r; | |
1743 | ||
1744 | key = NULL; | |
57fa1d09 TG |
1745 | |
1746 | return 0; | |
1747 | } | |
1748 | ||
1749 | static int device_get_sysattr_value(sd_device *device, const char *_key, const char **_value) { | |
1750 | const char *key = NULL, *value; | |
1751 | ||
1752 | assert(device); | |
1753 | assert(_key); | |
1754 | ||
1755 | value = hashmap_get2(device->sysattr_values, _key, (void **) &key); | |
1756 | if (!key) | |
1757 | return -ENOENT; | |
1758 | ||
1759 | if (_value) | |
1760 | *_value = value; | |
1761 | ||
1762 | return 0; | |
1763 | } | |
1764 | ||
1765 | /* We cache all sysattr lookups. If an attribute does not exist, it is stored | |
1766 | * with a NULL value in the cache, otherwise the returned string is stored */ | |
1767 | _public_ int sd_device_get_sysattr_value(sd_device *device, const char *sysattr, const char **_value) { | |
1768 | _cleanup_free_ char *value = NULL; | |
1769 | const char *syspath, *cached_value = NULL; | |
1770 | char *path; | |
1771 | struct stat statbuf; | |
1772 | int r; | |
1773 | ||
1774 | assert_return(device, -EINVAL); | |
1775 | assert_return(sysattr, -EINVAL); | |
1776 | ||
1777 | /* look for possibly already cached result */ | |
1778 | r = device_get_sysattr_value(device, sysattr, &cached_value); | |
1779 | if (r != -ENOENT) { | |
1780 | if (r < 0) | |
1781 | return r; | |
1782 | ||
1783 | if (!cached_value) | |
1784 | /* we looked up the sysattr before and it did not exist */ | |
1785 | return -ENOENT; | |
1786 | ||
1787 | if (_value) | |
1788 | *_value = cached_value; | |
1789 | ||
1790 | return 0; | |
1791 | } | |
1792 | ||
1793 | r = sd_device_get_syspath(device, &syspath); | |
1794 | if (r < 0) | |
1795 | return r; | |
1796 | ||
1797 | path = strjoina(syspath, "/", sysattr); | |
1798 | r = lstat(path, &statbuf); | |
1799 | if (r < 0) { | |
1800 | /* remember that we could not access the sysattr */ | |
1801 | r = device_add_sysattr_value(device, sysattr, NULL); | |
1802 | if (r < 0) | |
1803 | return r; | |
1804 | ||
1805 | return -ENOENT; | |
1806 | } else if (S_ISLNK(statbuf.st_mode)) { | |
1807 | /* Some core links return only the last element of the target path, | |
1808 | * these are just values, the paths should not be exposed. */ | |
1809 | if (STR_IN_SET(sysattr, "driver", "subsystem", "module")) { | |
1810 | r = readlink_value(path, &value); | |
1811 | if (r < 0) | |
1812 | return r; | |
1813 | } else | |
1814 | return -EINVAL; | |
1815 | } else if (S_ISDIR(statbuf.st_mode)) { | |
1816 | /* skip directories */ | |
1817 | return -EINVAL; | |
1818 | } else if (!(statbuf.st_mode & S_IRUSR)) { | |
1819 | /* skip non-readable files */ | |
1820 | return -EPERM; | |
1821 | } else { | |
1822 | size_t size; | |
1823 | ||
1824 | /* read attribute value */ | |
1825 | r = read_full_file(path, &value, &size); | |
1826 | if (r < 0) | |
1827 | return r; | |
1828 | ||
1829 | /* drop trailing newlines */ | |
1830 | while (size > 0 && value[--size] == '\n') | |
1831 | value[size] = '\0'; | |
1832 | } | |
1833 | ||
1834 | r = device_add_sysattr_value(device, sysattr, value); | |
1835 | if (r < 0) | |
1836 | return r; | |
1837 | ||
1838 | *_value = value; | |
1839 | value = NULL; | |
1840 | ||
1841 | return 0; | |
1842 | } | |
1843 | ||
1844 | static void device_remove_sysattr_value(sd_device *device, const char *_key) { | |
1845 | _cleanup_free_ char *key = NULL; | |
1846 | _cleanup_free_ char *value = NULL; | |
1847 | ||
1848 | assert(device); | |
1849 | assert(_key); | |
1850 | ||
1851 | value = hashmap_remove2(device->sysattr_values, _key, (void **) &key); | |
1852 | ||
1853 | return; | |
1854 | } | |
1855 | ||
1856 | /* set the attribute and save it in the cache. If a NULL value is passed the | |
1857 | * attribute is cleared from the cache */ | |
2fe29a46 | 1858 | _public_ int sd_device_set_sysattr_value(sd_device *device, const char *sysattr, char *_value) { |
57fa1d09 | 1859 | _cleanup_close_ int fd = -1; |
2fe29a46 | 1860 | _cleanup_free_ char *value = NULL; |
57fa1d09 TG |
1861 | const char *syspath; |
1862 | char *path; | |
1863 | struct stat statbuf; | |
1864 | size_t value_len = 0; | |
1865 | ssize_t size; | |
1866 | int r; | |
1867 | ||
1868 | assert_return(device, -EINVAL); | |
1869 | assert_return(sysattr, -EINVAL); | |
1870 | ||
2fe29a46 | 1871 | if (!_value) { |
57fa1d09 TG |
1872 | device_remove_sysattr_value(device, sysattr); |
1873 | ||
1874 | return 0; | |
1875 | } | |
1876 | ||
1877 | r = sd_device_get_syspath(device, &syspath); | |
1878 | if (r < 0) | |
1879 | return r; | |
1880 | ||
1881 | path = strjoina(syspath, "/", sysattr); | |
1882 | r = lstat(path, &statbuf); | |
1883 | if (r < 0) { | |
2fe29a46 TG |
1884 | value = strdup(""); |
1885 | if (!value) | |
1886 | return -ENOMEM; | |
1887 | ||
1888 | r = device_add_sysattr_value(device, sysattr, value); | |
57fa1d09 TG |
1889 | if (r < 0) |
1890 | return r; | |
1891 | ||
1892 | return -ENXIO; | |
1893 | } | |
1894 | ||
1895 | if (S_ISLNK(statbuf.st_mode)) | |
1896 | return -EINVAL; | |
1897 | ||
1898 | /* skip directories */ | |
1899 | if (S_ISDIR(statbuf.st_mode)) | |
1900 | return -EISDIR; | |
1901 | ||
1902 | /* skip non-readable files */ | |
1903 | if ((statbuf.st_mode & S_IRUSR) == 0) | |
1904 | return -EACCES; | |
1905 | ||
2fe29a46 | 1906 | value_len = strlen(_value); |
57fa1d09 TG |
1907 | |
1908 | /* drop trailing newlines */ | |
24eb4a30 DH |
1909 | while (value_len > 0 && _value[value_len - 1] == '\n') |
1910 | _value[--value_len] = '\0'; | |
57fa1d09 TG |
1911 | |
1912 | /* value length is limited to 4k */ | |
1913 | if (value_len > 4096) | |
1914 | return -EINVAL; | |
1915 | ||
1916 | fd = open(path, O_WRONLY | O_CLOEXEC); | |
1917 | if (fd < 0) | |
1918 | return -errno; | |
1919 | ||
2fe29a46 TG |
1920 | value = strdup(_value); |
1921 | if (!value) | |
1922 | return -ENOMEM; | |
1923 | ||
57fa1d09 TG |
1924 | size = write(fd, value, value_len); |
1925 | if (size < 0) | |
1926 | return -errno; | |
1927 | ||
1928 | if ((size_t)size != value_len) | |
1929 | return -EIO; | |
1930 | ||
1931 | r = device_add_sysattr_value(device, sysattr, value); | |
1932 | if (r < 0) | |
1933 | return r; | |
1934 | ||
2fe29a46 TG |
1935 | value = NULL; |
1936 | ||
57fa1d09 TG |
1937 | return 0; |
1938 | } |