]> git.ipfire.org Git - thirdparty/systemd.git/blame - src/udev/udev-rules.c
projects / thirdparty / systemd.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
udev: log error if chmod/chown of static dev nodes fails
[thirdparty/systemd.git] / src / udev / udev-rules.c
CommitLineData
2232cac8 1/*
1298001e 2 * Copyright (C) 2003-2012 Kay Sievers <kay@vrfy.org>
2232cac8 3 *
55e9959b
KS		 4 * This program is free software: you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation, either version 2 of the License, or
7 * (at your option) any later version.
3d6d12c6 8 *
55e9959b
KS		 9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
2232cac8 13 *
55e9959b
KS		 14 * You should have received a copy of the GNU General Public License
15 * along with this program. If not, see <http://www.gnu.org/licenses/>.
2232cac8
GKH		 16 */
17
18#include <stddef.h>
1449a55d 19#include <limits.h>
2232cac8 20#include <stdlib.h>
6d87ee2e 21#include <stdbool.h>
2232cac8
GKH		 22#include <string.h>
23#include <stdio.h>
24#include <fcntl.h>
25#include <ctype.h>
26#include <unistd.h>
27#include <errno.h>
5ee7ecfb 28#include <dirent.h>
cea61f5c 29#include <fnmatch.h>
959e8b5d 30#include <time.h>
2232cac8 31
2232cac8 32#include "udev.h"
9eb977db 33#include "path-util.h"
2c21044f 34#include "conf-files.h"
915bf0f6 35#include "strbuf.h"
84b6ad70 36#include "strv.h"
2232cac8 37
a1525d17 38#define PREALLOC_TOKEN 2048
c7521974 39
4052400f 40struct uid_gid {
912541b0
KS		 41 unsigned int name_off;
42 union {
a1525d17
KS		 43 uid_t uid;
44 gid_t gid;
912541b0 45 };
4052400f
KS		 46};
47
4052400f 48struct udev_rules {
912541b0 49 struct udev *udev;
775f8b3c 50 char **dirs;
40fe8b11 51 usec_t *dirs_ts_usec;
912541b0
KS		 52 int resolve_names;
53
54 /* every key in the rules file becomes a token */
55 struct token *tokens;
56 unsigned int token_cur;
57 unsigned int token_max;
58
ab06eef8 59 /* all key strings are copied and de-duplicated in a single continuous string buffer */
915bf0f6 60 struct strbuf *strbuf;
912541b0
KS		 61
62 /* during rule parsing, uid/gid lookup results are cached */
63 struct uid_gid *uids;
64 unsigned int uids_cur;
65 unsigned int uids_max;
66 struct uid_gid *gids;
67 unsigned int gids_cur;
68 unsigned int gids_max;
4052400f
KS		 69};
70
915bf0f6
KS		 71static char *rules_str(struct udev_rules *rules, unsigned int off) {
72 return rules->strbuf->buf + off;
73}
74
75static unsigned int rules_add_string(struct udev_rules *rules, const char *s) {
76 return strbuf_add_string(rules->strbuf, s, strlen(s));
77}
78
1449a55d 79/* KEY=="", KEY!="", KEY+="", KEY="", KEY:="" */
b0f7409f 80enum operation_type {
912541b0 81 OP_UNSET,
b0f7409f 82
912541b0
KS		 83 OP_MATCH,
84 OP_NOMATCH,
85 OP_MATCH_MAX,
b0f7409f 86
912541b0
KS		 87 OP_ADD,
88 OP_ASSIGN,
89 OP_ASSIGN_FINAL,
c7521974
KS		 90};
91
ac218d9c 92enum string_glob_type {
912541b0 93 GL_UNSET,
a1525d17 94 GL_PLAIN, /* no special chars */
912541b0 95 GL_GLOB, /* shell globs ?,*,[] */
a1525d17
KS		 96 GL_SPLIT, /* multi-value A|B */
97 GL_SPLIT_GLOB, /* multi-value with glob A*|B* */
98 GL_SOMETHING, /* commonly used "?*" */
ac218d9c
KS		 99};
100
32028733 101enum string_subst_type {
912541b0
KS		 102 SB_UNSET,
103 SB_NONE,
104 SB_FORMAT,
105 SB_SUBSYS,
32028733
KS		 106};
107
154a7b84 108/* tokens of a rule are sorted/handled in this order */
6880b25d 109enum token_type {
912541b0
KS		 110 TK_UNSET,
111 TK_RULE,
112
a1525d17
KS		 113 TK_M_ACTION, /* val */
114 TK_M_DEVPATH, /* val */
115 TK_M_KERNEL, /* val */
116 TK_M_DEVLINK, /* val */
117 TK_M_NAME, /* val */
118 TK_M_ENV, /* val, attr */
119 TK_M_TAG, /* val */
120 TK_M_SUBSYSTEM, /* val */
121 TK_M_DRIVER, /* val */
122 TK_M_WAITFOR, /* val */
123 TK_M_ATTR, /* val, attr */
912541b0
KS		 124
125 TK_M_PARENTS_MIN,
a1525d17 126 TK_M_KERNELS, /* val */
912541b0 127 TK_M_SUBSYSTEMS, /* val */
a1525d17
KS		 128 TK_M_DRIVERS, /* val */
129 TK_M_ATTRS, /* val, attr */
130 TK_M_TAGS, /* val */
912541b0
KS		 131 TK_M_PARENTS_MAX,
132
a1525d17
KS		 133 TK_M_TEST, /* val, mode_t */
134 TK_M_EVENT_TIMEOUT, /* int */
135 TK_M_PROGRAM, /* val */
136 TK_M_IMPORT_FILE, /* val */
137 TK_M_IMPORT_PROG, /* val */
138 TK_M_IMPORT_BUILTIN, /* val */
139 TK_M_IMPORT_DB, /* val */
140 TK_M_IMPORT_CMDLINE, /* val */
141 TK_M_IMPORT_PARENT, /* val */
142 TK_M_RESULT, /* val */
912541b0
KS		 143 TK_M_MAX,
144
145 TK_A_STRING_ESCAPE_NONE,
146 TK_A_STRING_ESCAPE_REPLACE,
147 TK_A_DB_PERSIST,
a1525d17
KS		 148 TK_A_INOTIFY_WATCH, /* int */
149 TK_A_DEVLINK_PRIO, /* int */
150 TK_A_OWNER, /* val */
151 TK_A_GROUP, /* val */
152 TK_A_MODE, /* val */
153 TK_A_OWNER_ID, /* uid_t */
154 TK_A_GROUP_ID, /* gid_t */
155 TK_A_MODE_ID, /* mode_t */
84b6ad70 156 TK_A_TAG, /* val */
a1525d17
KS		 157 TK_A_STATIC_NODE, /* val */
158 TK_A_ENV, /* val, attr */
a1525d17
KS		 159 TK_A_NAME, /* val */
160 TK_A_DEVLINK, /* val */
161 TK_A_ATTR, /* val, attr */
83cd6b75
KS		 162 TK_A_RUN_BUILTIN, /* val, bool */
163 TK_A_RUN_PROGRAM, /* val, bool */
a1525d17 164 TK_A_GOTO, /* size_t */
912541b0
KS		 165
166 TK_END,
c7521974
KS		 167};
168
3f3aa9f5 169/* we try to pack stuff in a way that we take only 12 bytes per token */
4052400f 170struct token {
912541b0
KS		 171 union {
172 unsigned char type; /* same in rule and key */
173 struct {
174 enum token_type type:8;
175 bool can_set_name:1;
176 bool has_static_node:1;
177 unsigned int unused:6;
178 unsigned short token_count;
179 unsigned int label_off;
180 unsigned short filename_off;
181 unsigned short filename_line;
182 } rule;
183 struct {
184 enum token_type type:8;
185 enum operation_type op:8;
186 enum string_glob_type glob:8;
187 enum string_subst_type subst:4;
188 enum string_subst_type attrsubst:4;
189 unsigned int value_off;
190 union {
191 unsigned int attr_off;
912541b0
KS		 192 unsigned int rule_goto;
193 mode_t mode;
194 uid_t uid;
195 gid_t gid;
196 int devlink_prio;
197 int event_timeout;
198 int watch;
199 enum udev_builtin_cmd builtin_cmd;
200 };
201 } key;
202 };
4052400f
KS		 203};
204
912541b0 205#define MAX_TK 64
4052400f 206struct rule_tmp {
912541b0
KS		 207 struct udev_rules *rules;
208 struct token rule;
209 struct token token[MAX_TK];
210 unsigned int token_cur;
4052400f
KS		 211};
212
baa30fbc 213#ifdef DEBUG
5d6a1fa6
KS		 214static const char *operation_str(enum operation_type type)
215{
912541b0 216 static const char *operation_strs[] = {
a1525d17
KS		 217 [OP_UNSET] = "UNSET",
218 [OP_MATCH] = "match",
219 [OP_NOMATCH] = "nomatch",
912541b0
KS		 220 [OP_MATCH_MAX] = "MATCH_MAX",
221
a1525d17
KS		 222 [OP_ADD] = "add",
223 [OP_ASSIGN] = "assign",
224 [OP_ASSIGN_FINAL] = "assign-final",
912541b0
KS		 225} ;
226
227 return operation_strs[type];
5d6a1fa6 228}
4052400f 229
5d6a1fa6
KS		 230static const char *string_glob_str(enum string_glob_type type)
231{
912541b0 232 static const char *string_glob_strs[] = {
a1525d17
KS		 233 [GL_UNSET] = "UNSET",
234 [GL_PLAIN] = "plain",
235 [GL_GLOB] = "glob",
236 [GL_SPLIT] = "split",
237 [GL_SPLIT_GLOB] = "split-glob",
238 [GL_SOMETHING] = "split-glob",
912541b0
KS		 239 };
240
241 return string_glob_strs[type];
5d6a1fa6
KS		 242}
243
244static const char *token_str(enum token_type type)
245{
912541b0 246 static const char *token_strs[] = {
a1525d17
KS		 247 [TK_UNSET] = "UNSET",
248 [TK_RULE] = "RULE",
912541b0 249
a1525d17 250 [TK_M_ACTION] = "M ACTION",
912541b0 251 [TK_M_DEVPATH] = "M DEVPATH",
a1525d17 252 [TK_M_KERNEL] = "M KERNEL",
912541b0 253 [TK_M_DEVLINK] = "M DEVLINK",
a1525d17
KS		 254 [TK_M_NAME] = "M NAME",
255 [TK_M_ENV] = "M ENV",
256 [TK_M_TAG] = "M TAG",
257 [TK_M_SUBSYSTEM] = "M SUBSYSTEM",
258 [TK_M_DRIVER] = "M DRIVER",
912541b0 259 [TK_M_WAITFOR] = "M WAITFOR",
a1525d17 260 [TK_M_ATTR] = "M ATTR",
912541b0 261
a1525d17 262 [TK_M_PARENTS_MIN] = "M PARENTS_MIN",
912541b0 263 [TK_M_KERNELS] = "M KERNELS",
a1525d17 264 [TK_M_SUBSYSTEMS] = "M SUBSYSTEMS",
912541b0 265 [TK_M_DRIVERS] = "M DRIVERS",
a1525d17
KS		 266 [TK_M_ATTRS] = "M ATTRS",
267 [TK_M_TAGS] = "M TAGS",
268 [TK_M_PARENTS_MAX] = "M PARENTS_MAX",
912541b0 269
a1525d17
KS		 270 [TK_M_TEST] = "M TEST",
271 [TK_M_EVENT_TIMEOUT] = "M EVENT_TIMEOUT",
912541b0 272 [TK_M_PROGRAM] = "M PROGRAM",
a1525d17
KS		 273 [TK_M_IMPORT_FILE] = "M IMPORT_FILE",
274 [TK_M_IMPORT_PROG] = "M IMPORT_PROG",
275 [TK_M_IMPORT_BUILTIN] = "M IMPORT_BUILTIN",
276 [TK_M_IMPORT_DB] = "M IMPORT_DB",
277 [TK_M_IMPORT_CMDLINE] = "M IMPORT_CMDLINE",
278 [TK_M_IMPORT_PARENT] = "M IMPORT_PARENT",
279 [TK_M_RESULT] = "M RESULT",
280 [TK_M_MAX] = "M MAX",
281
282 [TK_A_STRING_ESCAPE_NONE] = "A STRING_ESCAPE_NONE",
283 [TK_A_STRING_ESCAPE_REPLACE] = "A STRING_ESCAPE_REPLACE",
284 [TK_A_DB_PERSIST] = "A DB_PERSIST",
285 [TK_A_INOTIFY_WATCH] = "A INOTIFY_WATCH",
286 [TK_A_DEVLINK_PRIO] = "A DEVLINK_PRIO",
287 [TK_A_OWNER] = "A OWNER",
288 [TK_A_GROUP] = "A GROUP",
289 [TK_A_MODE] = "A MODE",
290 [TK_A_OWNER_ID] = "A OWNER_ID",
291 [TK_A_GROUP_ID] = "A GROUP_ID",
292 [TK_A_STATIC_NODE] = "A STATIC_NODE",
912541b0 293 [TK_A_MODE_ID] = "A MODE_ID",
a1525d17
KS		 294 [TK_A_ENV] = "A ENV",
295 [TK_A_TAG] = "A ENV",
296 [TK_A_NAME] = "A NAME",
912541b0 297 [TK_A_DEVLINK] = "A DEVLINK",
a1525d17 298 [TK_A_ATTR] = "A ATTR",
83cd6b75
KS		 299 [TK_A_RUN_BUILTIN] = "A RUN_BUILTIN",
300 [TK_A_RUN_PROGRAM] = "A RUN_PROGRAM",
a1525d17 301 [TK_A_GOTO] = "A GOTO",
912541b0 302
a1525d17 303 [TK_END] = "END",
912541b0
KS		 304 };
305
306 return token_strs[type];
5d6a1fa6 307}
c7521974 308
4052400f
KS		 309static void dump_token(struct udev_rules *rules, struct token *token)
310{
912541b0
KS		 311 enum token_type type = token->type;
312 enum operation_type op = token->key.op;
313 enum string_glob_type glob = token->key.glob;
915bf0f6 314 const char *value = str(rules, token->key.value_off);
912541b0
KS		 315 const char *attr = &rules->buf[token->key.attr_off];
316
317 switch (type) {
318 case TK_RULE:
319 {
320 const char *tks_ptr = (char *)rules->tokens;
321 const char *tk_ptr = (char *)token;
322 unsigned int idx = (tk_ptr - tks_ptr) / sizeof(struct token);
323
baa30fbc
KS		 324 log_debug("* RULE %s:%u, token: %u, count: %u, label: '%s'\n",
325 &rules->buf[token->rule.filename_off], token->rule.filename_line,
326 idx, token->rule.token_count,
327 &rules->buf[token->rule.label_off]);
912541b0
KS		 328 break;
329 }
330 case TK_M_ACTION:
331 case TK_M_DEVPATH:
332 case TK_M_KERNEL:
333 case TK_M_SUBSYSTEM:
334 case TK_M_DRIVER:
335 case TK_M_WAITFOR:
336 case TK_M_DEVLINK:
337 case TK_M_NAME:
338 case TK_M_KERNELS:
339 case TK_M_SUBSYSTEMS:
340 case TK_M_DRIVERS:
341 case TK_M_TAGS:
342 case TK_M_PROGRAM:
343 case TK_M_IMPORT_FILE:
344 case TK_M_IMPORT_PROG:
345 case TK_M_IMPORT_DB:
346 case TK_M_IMPORT_CMDLINE:
347 case TK_M_IMPORT_PARENT:
348 case TK_M_RESULT:
349 case TK_A_NAME:
350 case TK_A_DEVLINK:
351 case TK_A_OWNER:
352 case TK_A_GROUP:
353 case TK_A_MODE:
83cd6b75
KS		 354 case TK_A_RUN_BUILTIN:
355 case TK_A_RUN_PROGRAM:
baa30fbc
KS		 356 log_debug("%s %s '%s'(%s)\n",
357 token_str(type), operation_str(op), value, string_glob_str(glob));
912541b0
KS		 358 break;
359 case TK_M_IMPORT_BUILTIN:
baa30fbc 360 log_debug("%s %i '%s'\n", token_str(type), token->key.builtin_cmd, value);
912541b0
KS		 361 break;
362 case TK_M_ATTR:
363 case TK_M_ATTRS:
364 case TK_M_ENV:
365 case TK_A_ATTR:
366 case TK_A_ENV:
baa30fbc
KS		 367 log_debug("%s %s '%s' '%s'(%s)\n",
368 token_str(type), operation_str(op), attr, value, string_glob_str(glob));
912541b0
KS		 369 break;
370 case TK_M_TAG:
371 case TK_A_TAG:
baa30fbc 372 log_debug("%s %s '%s'\n", token_str(type), operation_str(op), value);
912541b0
KS		 373 break;
374 case TK_A_STRING_ESCAPE_NONE:
375 case TK_A_STRING_ESCAPE_REPLACE:
376 case TK_A_DB_PERSIST:
baa30fbc 377 log_debug("%s\n", token_str(type));
912541b0
KS		 378 break;
379 case TK_M_TEST:
baa30fbc
KS		 380 log_debug("%s %s '%s'(%s) %#o\n",
381 token_str(type), operation_str(op), value, string_glob_str(glob), token->key.mode);
912541b0
KS		 382 break;
383 case TK_A_INOTIFY_WATCH:
baa30fbc 384 log_debug("%s %u\n", token_str(type), token->key.watch);
912541b0
KS		 385 break;
386 case TK_A_DEVLINK_PRIO:
baa30fbc 387 log_debug("%s %u\n", token_str(type), token->key.devlink_prio);
912541b0
KS		 388 break;
389 case TK_A_OWNER_ID:
baa30fbc 390 log_debug("%s %s %u\n", token_str(type), operation_str(op), token->key.uid);
912541b0
KS		 391 break;
392 case TK_A_GROUP_ID:
baa30fbc 393 log_debug("%s %s %u\n", token_str(type), operation_str(op), token->key.gid);
912541b0
KS		 394 break;
395 case TK_A_MODE_ID:
baa30fbc 396 log_debug("%s %s %#o\n", token_str(type), operation_str(op), token->key.mode);
912541b0
KS		 397 break;
398 case TK_A_STATIC_NODE:
baa30fbc 399 log_debug("%s '%s'\n", token_str(type), value);
912541b0
KS		 400 break;
401 case TK_M_EVENT_TIMEOUT:
baa30fbc 402 log_debug("%s %u\n", token_str(type), token->key.event_timeout);
912541b0
KS		 403 break;
404 case TK_A_GOTO:
baa30fbc 405 log_debug("%s '%s' %u\n", token_str(type), value, token->key.rule_goto);
912541b0
KS		 406 break;
407 case TK_END:
baa30fbc 408 log_debug("* %s\n", token_str(type));
912541b0
KS		 409 break;
410 case TK_M_PARENTS_MIN:
411 case TK_M_PARENTS_MAX:
412 case TK_M_MAX:
413 case TK_UNSET:
baa30fbc 414 log_debug("unknown type %u\n", type);
912541b0
KS		 415 break;
416 }
4052400f 417}
154a7b84 418
4052400f
KS		 419static void dump_rules(struct udev_rules *rules)
420{
912541b0
KS		 421 unsigned int i;
422
baa30fbc
KS		 423 log_debug("dumping %u (%zu bytes) tokens, %u (%zu bytes) strings\n",
424 rules->token_cur,
425 rules->token_cur * sizeof(struct token),
426 rules->buf_count,
427 rules->buf_cur);
912541b0
KS		 428 for(i = 0; i < rules->token_cur; i++)
429 dump_token(rules, &rules->tokens[i]);
4052400f
KS		 430}
431#else
5d6a1fa6
KS		 432static inline const char *operation_str(enum operation_type type) { return NULL; }
433static inline const char *token_str(enum token_type type) { return NULL; }
4052400f
KS		 434static inline void dump_token(struct udev_rules *rules, struct token *token) {}
435static inline void dump_rules(struct udev_rules *rules) {}
baa30fbc 436#endif /* DEBUG */
c7521974 437
1449a55d
AJ		 438static int add_token(struct udev_rules *rules, struct token *token)
439{
912541b0
KS		 440 /* grow buffer if needed */
441 if (rules->token_cur+1 >= rules->token_max) {
442 struct token *tokens;
443 unsigned int add;
444
445 /* double the buffer size */
446 add = rules->token_max;
447 if (add < 8)
448 add = 8;
449
450 tokens = realloc(rules->tokens, (rules->token_max + add ) * sizeof(struct token));
451 if (tokens == NULL)
452 return -1;
912541b0
KS		 453 rules->tokens = tokens;
454 rules->token_max += add;
455 }
456 memcpy(&rules->tokens[rules->token_cur], token, sizeof(struct token));
457 rules->token_cur++;
458 return 0;
c7521974 459}
a27cd06c 460
154a7b84
KS		 461static uid_t add_uid(struct udev_rules *rules, const char *owner)
462{
912541b0
KS		 463 unsigned int i;
464 uid_t uid;
465 unsigned int off;
466
467 /* lookup, if we know it already */
468 for (i = 0; i < rules->uids_cur; i++) {
469 off = rules->uids[i].name_off;
915bf0f6 470 if (streq(rules_str(rules, off), owner)) {
912541b0 471 uid = rules->uids[i].uid;
912541b0
KS		 472 return uid;
473 }
474 }
475 uid = util_lookup_user(rules->udev, owner);
476
477 /* grow buffer if needed */
478 if (rules->uids_cur+1 >= rules->uids_max) {
479 struct uid_gid *uids;
480 unsigned int add;
481
482 /* double the buffer size */
483 add = rules->uids_max;
484 if (add < 1)
485 add = 8;
486
487 uids = realloc(rules->uids, (rules->uids_max + add ) * sizeof(struct uid_gid));
488 if (uids == NULL)
489 return uid;
912541b0
KS		 490 rules->uids = uids;
491 rules->uids_max += add;
492 }
493 rules->uids[rules->uids_cur].uid = uid;
915bf0f6 494 off = rules_add_string(rules, owner);
912541b0
KS		 495 if (off <= 0)
496 return uid;
497 rules->uids[rules->uids_cur].name_off = off;
498 rules->uids_cur++;
499 return uid;
154a7b84
KS		 500}
501
502static gid_t add_gid(struct udev_rules *rules, const char *group)
503{
912541b0
KS		 504 unsigned int i;
505 gid_t gid;
506 unsigned int off;
507
508 /* lookup, if we know it already */
509 for (i = 0; i < rules->gids_cur; i++) {
510 off = rules->gids[i].name_off;
915bf0f6 511 if (streq(rules_str(rules, off), group)) {
912541b0 512 gid = rules->gids[i].gid;
912541b0
KS		 513 return gid;
514 }
515 }
516 gid = util_lookup_group(rules->udev, group);
517
518 /* grow buffer if needed */
519 if (rules->gids_cur+1 >= rules->gids_max) {
520 struct uid_gid *gids;
521 unsigned int add;
522
523 /* double the buffer size */
524 add = rules->gids_max;
525 if (add < 1)
526 add = 8;
527
528 gids = realloc(rules->gids, (rules->gids_max + add ) * sizeof(struct uid_gid));
529 if (gids == NULL)
530 return gid;
912541b0
KS		 531 rules->gids = gids;
532 rules->gids_max += add;
533 }
534 rules->gids[rules->gids_cur].gid = gid;
915bf0f6 535 off = rules_add_string(rules, group);
912541b0
KS		 536 if (off <= 0)
537 return gid;
538 rules->gids[rules->gids_cur].name_off = off;
539 rules->gids_cur++;
540 return gid;
154a7b84
KS		 541}
542
bb144ed1 543static int import_property_from_string(struct udev_device *dev, char *line)
bd0ed2ff 544{
912541b0
KS		 545 char *key;
546 char *val;
547 size_t len;
548
549 /* find key */
550 key = line;
551 while (isspace(key[0]))
552 key++;
553
554 /* comment or empty line */
555 if (key[0] == '#' || key[0] == '\0')
556 return -1;
557
558 /* split key/value */
559 val = strchr(key, '=');
560 if (val == NULL)
561 return -1;
562 val[0] = '\0';
563 val++;
564
565 /* find value */
566 while (isspace(val[0]))
567 val++;
568
569 /* terminate key */
570 len = strlen(key);
571 if (len == 0)
572 return -1;
573 while (isspace(key[len-1]))
574 len--;
575 key[len] = '\0';
576
577 /* terminate value */
578 len = strlen(val);
579 if (len == 0)
580 return -1;
581 while (isspace(val[len-1]))
582 len--;
583 val[len] = '\0';
584
585 if (len == 0)
586 return -1;
587
588 /* unquote */
589 if (val[0] == '"' || val[0] == '\'') {
590 if (val[len-1] != val[0]) {
baa30fbc 591 log_debug("inconsistent quoting: '%s', skip\n", line);
912541b0
KS		 592 return -1;
593 }
594 val[len-1] = '\0';
595 val++;
596 }
597
912541b0 598 /* handle device, renamed by external tool, returning new path */
33502ffe 599 if (streq(key, "DEVPATH")) {
912541b0
KS		 600 char syspath[UTIL_PATH_SIZE];
601
baa30fbc
KS		 602 log_debug("updating devpath from '%s' to '%s'\n",
603 udev_device_get_devpath(dev), val);
d5a89d7d 604 strscpyl(syspath, sizeof(syspath), "/sys", val, NULL);
912541b0
KS		 605 udev_device_set_syspath(dev, syspath);
606 } else {
607 struct udev_list_entry *entry;
608
609 entry = udev_device_add_property(dev, key, val);
610 /* store in db, skip private keys */
611 if (key[0] != '.')
612 udev_list_entry_set_num(entry, true);
613 }
614 return 0;
be4bedd1
KS		 615}
616
6880b25d 617static int import_file_into_properties(struct udev_device *dev, const char *filename)
be4bedd1 618{
912541b0
KS		 619 FILE *f;
620 char line[UTIL_LINE_SIZE];
621
47ef94ac 622 f = fopen(filename, "re");
912541b0
KS		 623 if (f == NULL)
624 return -1;
625 while (fgets(line, sizeof(line), f) != NULL)
626 import_property_from_string(dev, line);
627 fclose(f);
628 return 0;
bd0ed2ff
KS		 629}
630
2181d30a 631static int import_program_into_properties(struct udev_event *event, const char *program, const sigset_t *sigmask)
319c6700 632{
912541b0
KS		 633 struct udev_device *dev = event->dev;
634 char **envp;
635 char result[UTIL_LINE_SIZE];
636 char *line;
637 int err;
638
639 envp = udev_device_get_properties_envp(dev);
640 err = udev_event_spawn(event, program, envp, sigmask, result, sizeof(result));
641 if (err < 0)
642 return err;
643
644 line = result;
645 while (line != NULL) {
646 char *pos;
647
648 pos = strchr(line, '\n');
649 if (pos != NULL) {
650 pos[0] = '\0';
651 pos = &pos[1];
652 }
653 import_property_from_string(dev, line);
654 line = pos;
655 }
656 return 0;
319c6700
KS		 657}
658
6880b25d 659static int import_parent_into_properties(struct udev_device *dev, const char *filter)
0bfb84e1 660{
912541b0
KS		 661 struct udev_device *dev_parent;
662 struct udev_list_entry *list_entry;
663
664 dev_parent = udev_device_get_parent(dev);
665 if (dev_parent == NULL)
666 return -1;
667
912541b0
KS		 668 udev_list_entry_foreach(list_entry, udev_device_get_properties_list_entry(dev_parent)) {
669 const char *key = udev_list_entry_get_name(list_entry);
670 const char *val = udev_list_entry_get_value(list_entry);
671
672 if (fnmatch(filter, key, 0) == 0) {
673 struct udev_list_entry *entry;
674
912541b0
KS		 675 entry = udev_device_add_property(dev, key, val);
676 /* store in db, skip private keys */
677 if (key[0] != '.')
678 udev_list_entry_set_num(entry, true);
679 }
680 }
681 return 0;
e2ecb34f
KS		 682}
683
912541b0 684#define WAIT_LOOP_PER_SECOND 50
6880b25d 685static int wait_for_file(struct udev_device *dev, const char *file, int timeout)
b2fe4b9a 686{
912541b0
KS		 687 char filepath[UTIL_PATH_SIZE];
688 char devicepath[UTIL_PATH_SIZE];
689 struct stat stats;
690 int loop = timeout * WAIT_LOOP_PER_SECOND;
691
692 /* a relative path is a device attribute */
693 devicepath[0] = '\0';
694 if (file[0] != '/') {
d5a89d7d
KS		 695 strscpyl(devicepath, sizeof(devicepath), udev_device_get_syspath(dev), NULL);
696 strscpyl(filepath, sizeof(filepath), devicepath, "/", file, NULL);
912541b0
KS		 697 file = filepath;
698 }
699
912541b0
KS		 700 while (--loop) {
701 const struct timespec duration = { 0, 1000 * 1000 * 1000 / WAIT_LOOP_PER_SECOND };
702
703 /* lookup file */
704 if (stat(file, &stats) == 0) {
baa30fbc 705 log_debug("file '%s' appeared after %i loops\n", file, (timeout * WAIT_LOOP_PER_SECOND) - loop-1);
912541b0
KS		 706 return 0;
707 }
708 /* make sure, the device did not disappear in the meantime */
709 if (devicepath[0] != '\0' && stat(devicepath, &stats) != 0) {
baa30fbc 710 log_debug("device disappeared while waiting for '%s'\n", file);
912541b0
KS		 711 return -2;
712 }
baa30fbc 713 log_debug("wait for '%s' for %i mseconds\n", file, 1000 / WAIT_LOOP_PER_SECOND);
912541b0
KS		 714 nanosleep(&duration, NULL);
715 }
baa30fbc 716 log_debug("waiting for '%s' failed\n", file);
912541b0 717 return -1;
b2fe4b9a
KS		 718}
719
0ea5e96e
KS		 720static int attr_subst_subdir(char *attr, size_t len)
721{
912541b0
KS		 722 bool found = false;
723
724 if (strstr(attr, "/*/")) {
725 char *pos;
726 char dirname[UTIL_PATH_SIZE];
727 const char *tail;
728 DIR *dir;
729
d5a89d7d 730 strscpy(dirname, sizeof(dirname), attr);
912541b0
KS		 731 pos = strstr(dirname, "/*/");
732 if (pos == NULL)
733 return -1;
734 pos[0] = '\0';
735 tail = &pos[2];
736 dir = opendir(dirname);
737 if (dir != NULL) {
738 struct dirent *dent;
739
740 for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) {
741 struct stat stats;
742
743 if (dent->d_name[0] == '.')
744 continue;
d5a89d7d 745 strscpyl(attr, len, dirname, "/", dent->d_name, tail, NULL);
912541b0
KS		 746 if (stat(attr, &stats) == 0) {
747 found = true;
748 break;
749 }
750 }
751 closedir(dir);
752 }
753 }
754
755 return found;
0ea5e96e
KS		 756}
757
b0f7409f 758static int get_key(struct udev *udev, char **line, char **key, enum operation_type *op, char **value)
a0e5382d 759{
912541b0
KS		 760 char *linepos;
761 char *temp;
762
763 linepos = *line;
764 if (linepos == NULL || linepos[0] == '\0')
765 return -1;
766
767 /* skip whitespace */
768 while (isspace(linepos[0]) || linepos[0] == ',')
769 linepos++;
770
771 /* get the key */
772 if (linepos[0] == '\0')
773 return -1;
774 *key = linepos;
775
776 for (;;) {
777 linepos++;
778 if (linepos[0] == '\0')
779 return -1;
780 if (isspace(linepos[0]))
781 break;
782 if (linepos[0] == '=')
783 break;
784 if ((linepos[0] == '+') || (linepos[0] == '!') || (linepos[0] == ':'))
785 if (linepos[1] == '=')
786 break;
787 }
788
789 /* remember end of key */
790 temp = linepos;
791
792 /* skip whitespace after key */
793 while (isspace(linepos[0]))
794 linepos++;
795 if (linepos[0] == '\0')
796 return -1;
797
798 /* get operation type */
799 if (linepos[0] == '=' && linepos[1] == '=') {
800 *op = OP_MATCH;
801 linepos += 2;
802 } else if (linepos[0] == '!' && linepos[1] == '=') {
803 *op = OP_NOMATCH;
804 linepos += 2;
805 } else if (linepos[0] == '+' && linepos[1] == '=') {
806 *op = OP_ADD;
807 linepos += 2;
808 } else if (linepos[0] == '=') {
809 *op = OP_ASSIGN;
810 linepos++;
811 } else if (linepos[0] == ':' && linepos[1] == '=') {
812 *op = OP_ASSIGN_FINAL;
813 linepos += 2;
814 } else
815 return -1;
816
817 /* terminate key */
818 temp[0] = '\0';
819
820 /* skip whitespace after operator */
821 while (isspace(linepos[0]))
822 linepos++;
823 if (linepos[0] == '\0')
824 return -1;
825
826 /* get the value */
827 if (linepos[0] == '"')
828 linepos++;
829 else
830 return -1;
831 *value = linepos;
832
833 /* terminate */
834 temp = strchr(linepos, '"');
835 if (!temp)
836 return -1;
837 temp[0] = '\0';
838 temp++;
912541b0
KS		 839
840 /* move line to next key */
841 *line = temp;
842 return 0;
6880b25d 843}
95776dc6 844
6880b25d 845/* extract possible KEY{attr} */
04a9d3a0 846static const char *get_key_attribute(struct udev *udev, char *str)
6880b25d 847{
912541b0
KS		 848 char *pos;
849 char *attr;
850
851 attr = strchr(str, '{');
852 if (attr != NULL) {
853 attr++;
854 pos = strchr(attr, '}');
855 if (pos == NULL) {
baa30fbc 856 log_error("missing closing brace for format\n");
912541b0
KS		 857 return NULL;
858 }
859 pos[0] = '\0';
912541b0
KS		 860 return attr;
861 }
862 return NULL;
6880b25d 863}
95776dc6 864
0ef254d5 865static int rule_add_key(struct rule_tmp *rule_tmp, enum token_type type,
912541b0
KS		 866 enum operation_type op,
867 const char *value, const void *data)
6880b25d 868{
912541b0
KS		 869 struct token *token = &rule_tmp->token[rule_tmp->token_cur];
870 const char *attr = NULL;
871
872 memset(token, 0x00, sizeof(struct token));
873
874 switch (type) {
875 case TK_M_ACTION:
876 case TK_M_DEVPATH:
877 case TK_M_KERNEL:
878 case TK_M_SUBSYSTEM:
879 case TK_M_DRIVER:
880 case TK_M_WAITFOR:
881 case TK_M_DEVLINK:
882 case TK_M_NAME:
883 case TK_M_KERNELS:
884 case TK_M_SUBSYSTEMS:
885 case TK_M_DRIVERS:
886 case TK_M_TAGS:
887 case TK_M_PROGRAM:
888 case TK_M_IMPORT_FILE:
889 case TK_M_IMPORT_PROG:
890 case TK_M_IMPORT_DB:
891 case TK_M_IMPORT_CMDLINE:
892 case TK_M_IMPORT_PARENT:
893 case TK_M_RESULT:
894 case TK_A_OWNER:
895 case TK_A_GROUP:
896 case TK_A_MODE:
8a173387 897 case TK_A_DEVLINK:
912541b0
KS		 898 case TK_A_NAME:
899 case TK_A_GOTO:
900 case TK_M_TAG:
901 case TK_A_TAG:
915bf0f6 902 token->key.value_off = rules_add_string(rule_tmp->rules, value);
912541b0
KS		 903 break;
904 case TK_M_IMPORT_BUILTIN:
915bf0f6 905 token->key.value_off = rules_add_string(rule_tmp->rules, value);
912541b0
KS		 906 token->key.builtin_cmd = *(enum udev_builtin_cmd *)data;
907 break;
908 case TK_M_ENV:
909 case TK_M_ATTR:
910 case TK_M_ATTRS:
911 case TK_A_ATTR:
912 case TK_A_ENV:
913 attr = data;
915bf0f6
KS		 914 token->key.value_off = rules_add_string(rule_tmp->rules, value);
915 token->key.attr_off = rules_add_string(rule_tmp->rules, attr);
912541b0 916 break;
912541b0 917 case TK_M_TEST:
915bf0f6 918 token->key.value_off = rules_add_string(rule_tmp->rules, value);
912541b0
KS		 919 if (data != NULL)
920 token->key.mode = *(mode_t *)data;
921 break;
922 case TK_A_STRING_ESCAPE_NONE:
923 case TK_A_STRING_ESCAPE_REPLACE:
924 case TK_A_DB_PERSIST:
925 break;
83cd6b75 926 case TK_A_RUN_BUILTIN:
83cd6b75 927 case TK_A_RUN_PROGRAM:
4590cfe4 928 token->key.builtin_cmd = *(enum udev_builtin_cmd *)data;
915bf0f6 929 token->key.value_off = rules_add_string(rule_tmp->rules, value);
912541b0
KS		 930 break;
931 case TK_A_INOTIFY_WATCH:
932 case TK_A_DEVLINK_PRIO:
933 token->key.devlink_prio = *(int *)data;
934 break;
935 case TK_A_OWNER_ID:
936 token->key.uid = *(uid_t *)data;
937 break;
938 case TK_A_GROUP_ID:
939 token->key.gid = *(gid_t *)data;
940 break;
941 case TK_A_MODE_ID:
942 token->key.mode = *(mode_t *)data;
943 break;
944 case TK_A_STATIC_NODE:
915bf0f6 945 token->key.value_off = rules_add_string(rule_tmp->rules, value);
912541b0
KS		 946 break;
947 case TK_M_EVENT_TIMEOUT:
948 token->key.event_timeout = *(int *)data;
949 break;
950 case TK_RULE:
951 case TK_M_PARENTS_MIN:
952 case TK_M_PARENTS_MAX:
953 case TK_M_MAX:
954 case TK_END:
955 case TK_UNSET:
baa30fbc 956 log_error("wrong type %u\n", type);
912541b0
KS		 957 return -1;
958 }
959
960 if (value != NULL && type < TK_M_MAX) {
961 /* check if we need to split or call fnmatch() while matching rules */
962 enum string_glob_type glob;
963 int has_split;
964 int has_glob;
965
966 has_split = (strchr(value, '|') != NULL);
967 has_glob = (strchr(value, '*') != NULL || strchr(value, '?') != NULL || strchr(value, '[') != NULL);
968 if (has_split && has_glob) {
969 glob = GL_SPLIT_GLOB;
970 } else if (has_split) {
971 glob = GL_SPLIT;
972 } else if (has_glob) {
33502ffe 973 if (streq(value, "?*"))
912541b0
KS		 974 glob = GL_SOMETHING;
975 else
976 glob = GL_GLOB;
977 } else {
978 glob = GL_PLAIN;
979 }
980 token->key.glob = glob;
981 }
982
983 if (value != NULL && type > TK_M_MAX) {
984 /* check if assigned value has substitution chars */
985 if (value[0] == '[')
986 token->key.subst = SB_SUBSYS;
987 else if (strchr(value, '%') != NULL || strchr(value, '$') != NULL)
988 token->key.subst = SB_FORMAT;
989 else
990 token->key.subst = SB_NONE;
991 }
992
993 if (attr != NULL) {
994 /* check if property/attribut name has substitution chars */
995 if (attr[0] == '[')
996 token->key.attrsubst = SB_SUBSYS;
997 else if (strchr(attr, '%') != NULL || strchr(attr, '$') != NULL)
998 token->key.attrsubst = SB_FORMAT;
999 else
1000 token->key.attrsubst = SB_NONE;
1001 }
1002
1003 token->key.type = type;
1004 token->key.op = op;
1005 rule_tmp->token_cur++;
8fef0ff2 1006 if (rule_tmp->token_cur >= ELEMENTSOF(rule_tmp->token)) {
baa30fbc 1007 log_error("temporary rule array too small\n");
912541b0
KS		 1008 return -1;
1009 }
1010 return 0;
6880b25d 1011}
e57e7bc1 1012
6880b25d
KS		 1013static int sort_token(struct udev_rules *rules, struct rule_tmp *rule_tmp)
1014{
912541b0
KS		 1015 unsigned int i;
1016 unsigned int start = 0;
1017 unsigned int end = rule_tmp->token_cur;
1018
1019 for (i = 0; i < rule_tmp->token_cur; i++) {
1020 enum token_type next_val = TK_UNSET;
1021 unsigned int next_idx = 0;
1022 unsigned int j;
1023
1024 /* find smallest value */
1025 for (j = start; j < end; j++) {
1026 if (rule_tmp->token[j].type == TK_UNSET)
1027 continue;
1028 if (next_val == TK_UNSET || rule_tmp->token[j].type < next_val) {
1029 next_val = rule_tmp->token[j].type;
1030 next_idx = j;
1031 }
1032 }
1033
1034 /* add token and mark done */
1035 if (add_token(rules, &rule_tmp->token[next_idx]) != 0)
1036 return -1;
1037 rule_tmp->token[next_idx].type = TK_UNSET;
1038
1039 /* shrink range */
1040 if (next_idx == start)
1041 start++;
1042 if (next_idx+1 == end)
1043 end--;
1044 }
1045 return 0;
724257d9
GKH		 1046}
1047
6880b25d 1048static int add_rule(struct udev_rules *rules, char *line,
912541b0 1049 const char *filename, unsigned int filename_off, unsigned int lineno)
724257d9 1050{
912541b0 1051 char *linepos;
04a9d3a0 1052 const char *attr;
912541b0
KS		 1053 struct rule_tmp rule_tmp;
1054
1055 memset(&rule_tmp, 0x00, sizeof(struct rule_tmp));
1056 rule_tmp.rules = rules;
1057 rule_tmp.rule.type = TK_RULE;
775f8b3c
KS		 1058 /* the offset in the rule is limited to unsigned short */
1059 if (filename_off < USHRT_MAX)
1060 rule_tmp.rule.rule.filename_off = filename_off;
912541b0
KS		 1061 rule_tmp.rule.rule.filename_line = lineno;
1062
1063 linepos = line;
1064 for (;;) {
1065 char *key;
1066 char *value;
1067 enum operation_type op;
1068
1069 if (get_key(rules->udev, &linepos, &key, &op, &value) != 0)
1070 break;
1071
33502ffe 1072 if (streq(key, "ACTION")) {
912541b0 1073 if (op > OP_MATCH_MAX) {
baa30fbc 1074 log_error("invalid ACTION operation\n");
912541b0
KS		 1075 goto invalid;
1076 }
1077 rule_add_key(&rule_tmp, TK_M_ACTION, op, value, NULL);
1078 continue;
1079 }
1080
33502ffe 1081 if (streq(key, "DEVPATH")) {
912541b0 1082 if (op > OP_MATCH_MAX) {
baa30fbc 1083 log_error("invalid DEVPATH operation\n");
912541b0
KS		 1084 goto invalid;
1085 }
1086 rule_add_key(&rule_tmp, TK_M_DEVPATH, op, value, NULL);
1087 continue;
1088 }
1089
33502ffe 1090 if (streq(key, "KERNEL")) {
912541b0 1091 if (op > OP_MATCH_MAX) {
baa30fbc 1092 log_error("invalid KERNEL operation\n");
912541b0
KS		 1093 goto invalid;
1094 }
1095 rule_add_key(&rule_tmp, TK_M_KERNEL, op, value, NULL);
1096 continue;
1097 }
1098
33502ffe 1099 if (streq(key, "SUBSYSTEM")) {
912541b0 1100 if (op > OP_MATCH_MAX) {
baa30fbc 1101 log_error("invalid SUBSYSTEM operation\n");
912541b0
KS		 1102 goto invalid;
1103 }
1104 /* bus, class, subsystem events should all be the same */
33502ffe
KS		 1105 if (streq(value, "subsystem") ||
1106 streq(value, "bus") ||
1107 streq(value, "class")) {
1108 if (streq(value, "bus") || streq(value, "class"))
baa30fbc 1109 log_error("'%s' must be specified as 'subsystem' \n"
912541b0
KS		 1110 "please fix it in %s:%u", value, filename, lineno);
1111 rule_add_key(&rule_tmp, TK_M_SUBSYSTEM, op, "subsystem|class|bus", NULL);
1112 } else
1113 rule_add_key(&rule_tmp, TK_M_SUBSYSTEM, op, value, NULL);
1114 continue;
1115 }
1116
33502ffe 1117 if (streq(key, "DRIVER")) {
912541b0 1118 if (op > OP_MATCH_MAX) {
baa30fbc 1119 log_error("invalid DRIVER operation\n");
912541b0
KS		 1120 goto invalid;
1121 }
1122 rule_add_key(&rule_tmp, TK_M_DRIVER, op, value, NULL);
1123 continue;
1124 }
1125
33502ffe 1126 if (startswith(key, "ATTR{")) {
912541b0
KS		 1127 attr = get_key_attribute(rules->udev, key + sizeof("ATTR")-1);
1128 if (attr == NULL) {
baa30fbc 1129 log_error("error parsing ATTR attribute\n");
912541b0
KS		 1130 goto invalid;
1131 }
1132 if (op < OP_MATCH_MAX) {
1133 rule_add_key(&rule_tmp, TK_M_ATTR, op, value, attr);
1134 } else {
1135 rule_add_key(&rule_tmp, TK_A_ATTR, op, value, attr);
1136 }
1137 continue;
1138 }
1139
33502ffe 1140 if (streq(key, "KERNELS")) {
912541b0 1141 if (op > OP_MATCH_MAX) {
baa30fbc 1142 log_error("invalid KERNELS operation\n");
912541b0
KS		 1143 goto invalid;
1144 }
1145 rule_add_key(&rule_tmp, TK_M_KERNELS, op, value, NULL);
1146 continue;
1147 }
1148
33502ffe 1149 if (streq(key, "SUBSYSTEMS")) {
912541b0 1150 if (op > OP_MATCH_MAX) {
baa30fbc 1151 log_error("invalid SUBSYSTEMS operation\n");
912541b0
KS		 1152 goto invalid;
1153 }
1154 rule_add_key(&rule_tmp, TK_M_SUBSYSTEMS, op, value, NULL);
1155 continue;
1156 }
1157
33502ffe 1158 if (streq(key, "DRIVERS")) {
912541b0 1159 if (op > OP_MATCH_MAX) {
baa30fbc 1160 log_error("invalid DRIVERS operation\n");
912541b0
KS		 1161 goto invalid;
1162 }
1163 rule_add_key(&rule_tmp, TK_M_DRIVERS, op, value, NULL);
1164 continue;
1165 }
1166
33502ffe 1167 if (startswith(key, "ATTRS{")) {
912541b0 1168 if (op > OP_MATCH_MAX) {
baa30fbc 1169 log_error("invalid ATTRS operation\n");
912541b0
KS		 1170 goto invalid;
1171 }
1172 attr = get_key_attribute(rules->udev, key + sizeof("ATTRS")-1);
1173 if (attr == NULL) {
baa30fbc 1174 log_error("error parsing ATTRS attribute\n");
912541b0
KS		 1175 goto invalid;
1176 }
33502ffe 1177 if (startswith(attr, "device/"))
baa30fbc 1178 log_error("the 'device' link may not be available in a future kernel, "
912541b0
KS		 1179 "please fix it in %s:%u", filename, lineno);
1180 else if (strstr(attr, "../") != NULL)
baa30fbc 1181 log_error("do not reference parent sysfs directories directly, "
912541b0
KS		 1182 "it may break with a future kernel, please fix it in %s:%u", filename, lineno);
1183 rule_add_key(&rule_tmp, TK_M_ATTRS, op, value, attr);
1184 continue;
1185 }
1186
33502ffe 1187 if (streq(key, "TAGS")) {
912541b0 1188 if (op > OP_MATCH_MAX) {
baa30fbc 1189 log_error("invalid TAGS operation\n");
912541b0
KS		 1190 goto invalid;
1191 }
1192 rule_add_key(&rule_tmp, TK_M_TAGS, op, value, NULL);
1193 continue;
1194 }
1195
33502ffe 1196 if (startswith(key, "ENV{")) {
912541b0
KS		 1197 attr = get_key_attribute(rules->udev, key + sizeof("ENV")-1);
1198 if (attr == NULL) {
baa30fbc 1199 log_error("error parsing ENV attribute\n");
912541b0
KS		 1200 goto invalid;
1201 }
1202 if (op < OP_MATCH_MAX) {
1203 if (rule_add_key(&rule_tmp, TK_M_ENV, op, value, attr) != 0)
1204 goto invalid;
1205 } else {
1206 static const char *blacklist[] = {
1207 "ACTION",
1208 "SUBSYSTEM",
1209 "DEVTYPE",
1210 "MAJOR",
1211 "MINOR",
1212 "DRIVER",
1213 "IFINDEX",
1214 "DEVNAME",
1215 "DEVLINKS",
1216 "DEVPATH",
1217 "TAGS",
1218 };
1219 unsigned int i;
1220
395ea978
KS		 1221 for (i = 0; i < ELEMENTSOF(blacklist); i++) {
1222 if (!streq(attr, blacklist[i]))
912541b0 1223 continue;
395ea978
KS		 1224 log_error("invalid ENV attribute, '%s' can not be set %s:%u\n", attr, filename, lineno);
1225 goto invalid;
1226 }
912541b0
KS		 1227 if (rule_add_key(&rule_tmp, TK_A_ENV, op, value, attr) != 0)
1228 goto invalid;
1229 }
1230 continue;
1231 }
1232
33502ffe 1233 if (streq(key, "TAG")) {
912541b0
KS		 1234 if (op < OP_MATCH_MAX)
1235 rule_add_key(&rule_tmp, TK_M_TAG, op, value, NULL);
1236 else
1237 rule_add_key(&rule_tmp, TK_A_TAG, op, value, NULL);
1238 continue;
1239 }
1240
33502ffe 1241 if (streq(key, "PROGRAM")) {
912541b0
KS		 1242 rule_add_key(&rule_tmp, TK_M_PROGRAM, op, value, NULL);
1243 continue;
1244 }
1245
33502ffe 1246 if (streq(key, "RESULT")) {
912541b0 1247 if (op > OP_MATCH_MAX) {
baa30fbc 1248 log_error("invalid RESULT operation\n");
912541b0
KS		 1249 goto invalid;
1250 }
1251 rule_add_key(&rule_tmp, TK_M_RESULT, op, value, NULL);
1252 continue;
1253 }
1254
33502ffe 1255 if (startswith(key, "IMPORT")) {
912541b0
KS		 1256 attr = get_key_attribute(rules->udev, key + sizeof("IMPORT")-1);
1257 if (attr == NULL) {
baa30fbc 1258 log_error("IMPORT{} type missing, ignoring IMPORT %s:%u\n", filename, lineno);
912541b0
KS		 1259 continue;
1260 }
33502ffe 1261 if (streq(attr, "program")) {
912541b0
KS		 1262 /* find known built-in command */
1263 if (value[0] != '/') {
1264 enum udev_builtin_cmd cmd;
1265
1266 cmd = udev_builtin_lookup(value);
1267 if (cmd < UDEV_BUILTIN_MAX) {
baa30fbc
KS		 1268 log_debug("IMPORT found builtin '%s', replacing %s:%u\n",
1269 value, filename, lineno);
912541b0
KS		 1270 rule_add_key(&rule_tmp, TK_M_IMPORT_BUILTIN, op, value, &cmd);
1271 continue;
1272 }
1273 }
912541b0 1274 rule_add_key(&rule_tmp, TK_M_IMPORT_PROG, op, value, NULL);
33502ffe 1275 } else if (streq(attr, "builtin")) {
912541b0
KS		 1276 enum udev_builtin_cmd cmd = udev_builtin_lookup(value);
1277
912541b0
KS		 1278 if (cmd < UDEV_BUILTIN_MAX)
1279 rule_add_key(&rule_tmp, TK_M_IMPORT_BUILTIN, op, value, &cmd);
1280 else
baa30fbc 1281 log_error("IMPORT{builtin}: '%s' unknown %s:%u\n", value, filename, lineno);
33502ffe 1282 } else if (streq(attr, "file")) {
912541b0 1283 rule_add_key(&rule_tmp, TK_M_IMPORT_FILE, op, value, NULL);
33502ffe 1284 } else if (streq(attr, "db")) {
912541b0 1285 rule_add_key(&rule_tmp, TK_M_IMPORT_DB, op, value, NULL);
33502ffe 1286 } else if (streq(attr, "cmdline")) {
912541b0 1287 rule_add_key(&rule_tmp, TK_M_IMPORT_CMDLINE, op, value, NULL);
33502ffe 1288 } else if (streq(attr, "parent")) {
912541b0 1289 rule_add_key(&rule_tmp, TK_M_IMPORT_PARENT, op, value, NULL);
83cd6b75
KS		 1290 } else
1291 log_error("IMPORT{} unknown type, ignoring IMPORT %s:%u\n", filename, lineno);
912541b0
KS		 1292 continue;
1293 }
1294
33502ffe 1295 if (startswith(key, "TEST")) {
912541b0
KS		 1296 mode_t mode = 0;
1297
1298 if (op > OP_MATCH_MAX) {
baa30fbc 1299 log_error("invalid TEST operation\n");
912541b0
KS		 1300 goto invalid;
1301 }
1302 attr = get_key_attribute(rules->udev, key + sizeof("TEST")-1);
1303 if (attr != NULL) {
1304 mode = strtol(attr, NULL, 8);
1305 rule_add_key(&rule_tmp, TK_M_TEST, op, value, &mode);
1306 } else {
1307 rule_add_key(&rule_tmp, TK_M_TEST, op, value, NULL);
1308 }
1309 continue;
1310 }
1311
33502ffe 1312 if (startswith(key, "RUN")) {
83cd6b75
KS		 1313 attr = get_key_attribute(rules->udev, key + sizeof("RUN")-1);
1314 if (attr == NULL)
1315 attr = "program";
1316
33502ffe 1317 if (streq(attr, "builtin")) {
83cd6b75
KS		 1318 enum udev_builtin_cmd cmd = udev_builtin_lookup(value);
1319
1320 if (cmd < UDEV_BUILTIN_MAX)
1321 rule_add_key(&rule_tmp, TK_A_RUN_BUILTIN, op, value, &cmd);
1322 else
1323 log_error("IMPORT{builtin}: '%s' unknown %s:%u\n", value, filename, lineno);
33502ffe 1324 } else if (streq(attr, "program")) {
83cd6b75
KS		 1325 enum udev_builtin_cmd cmd = UDEV_BUILTIN_MAX;
1326
83cd6b75
KS		 1327 rule_add_key(&rule_tmp, TK_A_RUN_PROGRAM, op, value, &cmd);
1328 } else {
1329 log_error("RUN{} unknown type, ignoring RUN %s:%u\n", filename, lineno);
1330 }
1331
912541b0
KS		 1332 continue;
1333 }
1334
33502ffe 1335 if (streq(key, "WAIT_FOR") || streq(key, "WAIT_FOR_SYSFS")) {
912541b0
KS		 1336 rule_add_key(&rule_tmp, TK_M_WAITFOR, 0, value, NULL);
1337 continue;
1338 }
1339
33502ffe 1340 if (streq(key, "LABEL")) {
915bf0f6 1341 rule_tmp.rule.rule.label_off = rules_add_string(rules, value);
912541b0
KS		 1342 continue;
1343 }
1344
33502ffe 1345 if (streq(key, "GOTO")) {
912541b0
KS		 1346 rule_add_key(&rule_tmp, TK_A_GOTO, 0, value, NULL);
1347 continue;
1348 }
1349
33502ffe 1350 if (startswith(key, "NAME")) {
912541b0
KS		 1351 if (op < OP_MATCH_MAX) {
1352 rule_add_key(&rule_tmp, TK_M_NAME, op, value, NULL);
1353 } else {
33502ffe 1354 if (streq(value, "%k")) {
baa30fbc 1355 log_error("NAME=\"%%k\" is ignored, because it breaks kernel supplied names, "
912541b0
KS		 1356 "please remove it from %s:%u\n", filename, lineno);
1357 continue;
1358 }
1359 if (value[0] == '\0') {
baa30fbc
KS		 1360 log_debug("NAME=\"\" is ignored, because udev will not delete any device nodes, "
1361 "please remove it from %s:%u\n", filename, lineno);
912541b0
KS		 1362 continue;
1363 }
1364 rule_add_key(&rule_tmp, TK_A_NAME, op, value, NULL);
1365 }
1366 rule_tmp.rule.rule.can_set_name = true;
1367 continue;
1368 }
1369
8a173387
KS		 1370 if (streq(key, "SYMLINK")) {
1371 if (op < OP_MATCH_MAX)
912541b0 1372 rule_add_key(&rule_tmp, TK_M_DEVLINK, op, value, NULL);
8a173387
KS		 1373 else
1374 rule_add_key(&rule_tmp, TK_A_DEVLINK, op, value, NULL);
912541b0
KS		 1375 rule_tmp.rule.rule.can_set_name = true;
1376 continue;
1377 }
1378
33502ffe 1379 if (streq(key, "OWNER")) {
912541b0
KS		 1380 uid_t uid;
1381 char *endptr;
1382
1383 uid = strtoul(value, &endptr, 10);
1384 if (endptr[0] == '\0') {
1385 rule_add_key(&rule_tmp, TK_A_OWNER_ID, op, NULL, &uid);
1386 } else if ((rules->resolve_names > 0) && strchr("$%", value[0]) == NULL) {
1387 uid = add_uid(rules, value);
1388 rule_add_key(&rule_tmp, TK_A_OWNER_ID, op, NULL, &uid);
1389 } else if (rules->resolve_names >= 0) {
1390 rule_add_key(&rule_tmp, TK_A_OWNER, op, value, NULL);
1391 }
1392 rule_tmp.rule.rule.can_set_name = true;
1393 continue;
1394 }
1395
33502ffe 1396 if (streq(key, "GROUP")) {
912541b0
KS		 1397 gid_t gid;
1398 char *endptr;
1399
1400 gid = strtoul(value, &endptr, 10);
1401 if (endptr[0] == '\0') {
1402 rule_add_key(&rule_tmp, TK_A_GROUP_ID, op, NULL, &gid);
1403 } else if ((rules->resolve_names > 0) && strchr("$%", value[0]) == NULL) {
1404 gid = add_gid(rules, value);
1405 rule_add_key(&rule_tmp, TK_A_GROUP_ID, op, NULL, &gid);
1406 } else if (rules->resolve_names >= 0) {
1407 rule_add_key(&rule_tmp, TK_A_GROUP, op, value, NULL);
1408 }
1409 rule_tmp.rule.rule.can_set_name = true;
1410 continue;
1411 }
1412
33502ffe 1413 if (streq(key, "MODE")) {
912541b0
KS		 1414 mode_t mode;
1415 char *endptr;
1416
1417 mode = strtol(value, &endptr, 8);
1418 if (endptr[0] == '\0')
1419 rule_add_key(&rule_tmp, TK_A_MODE_ID, op, NULL, &mode);
1420 else
1421 rule_add_key(&rule_tmp, TK_A_MODE, op, value, NULL);
1422 rule_tmp.rule.rule.can_set_name = true;
1423 continue;
1424 }
1425
33502ffe 1426 if (streq(key, "OPTIONS")) {
912541b0
KS		 1427 const char *pos;
1428
1429 pos = strstr(value, "link_priority=");
1430 if (pos != NULL) {
1431 int prio = atoi(&pos[strlen("link_priority=")]);
1432
1433 rule_add_key(&rule_tmp, TK_A_DEVLINK_PRIO, op, NULL, &prio);
912541b0
KS		 1434 }
1435
1436 pos = strstr(value, "event_timeout=");
1437 if (pos != NULL) {
1438 int tout = atoi(&pos[strlen("event_timeout=")]);
1439
1440 rule_add_key(&rule_tmp, TK_M_EVENT_TIMEOUT, op, NULL, &tout);
912541b0
KS		 1441 }
1442
1443 pos = strstr(value, "string_escape=");
1444 if (pos != NULL) {
1445 pos = &pos[strlen("string_escape=")];
33502ffe 1446 if (startswith(pos, "none"))
912541b0 1447 rule_add_key(&rule_tmp, TK_A_STRING_ESCAPE_NONE, op, NULL, NULL);
33502ffe 1448 else if (startswith(pos, "replace"))
912541b0
KS		 1449 rule_add_key(&rule_tmp, TK_A_STRING_ESCAPE_REPLACE, op, NULL, NULL);
1450 }
1451
1452 pos = strstr(value, "db_persist");
1453 if (pos != NULL)
1454 rule_add_key(&rule_tmp, TK_A_DB_PERSIST, op, NULL, NULL);
1455
1456 pos = strstr(value, "nowatch");
1457 if (pos != NULL) {
1458 const int off = 0;
1459
1460 rule_add_key(&rule_tmp, TK_A_INOTIFY_WATCH, op, NULL, &off);
912541b0
KS		 1461 } else {
1462 pos = strstr(value, "watch");
1463 if (pos != NULL) {
1464 const int on = 1;
1465
1466 rule_add_key(&rule_tmp, TK_A_INOTIFY_WATCH, op, NULL, &on);
912541b0
KS		 1467 }
1468 }
1469
1470 pos = strstr(value, "static_node=");
1471 if (pos != NULL) {
1472 rule_add_key(&rule_tmp, TK_A_STATIC_NODE, op, &pos[strlen("static_node=")], NULL);
1473 rule_tmp.rule.rule.has_static_node = true;
1474 }
1475
1476 continue;
1477 }
1478
baa30fbc 1479 log_error("unknown key '%s' in %s:%u\n", key, filename, lineno);
912541b0
KS		 1480 goto invalid;
1481 }
1482
1483 /* add rule token */
1484 rule_tmp.rule.rule.token_count = 1 + rule_tmp.token_cur;
1485 if (add_token(rules, &rule_tmp.rule) != 0)
1486 goto invalid;
1487
1488 /* add tokens to list, sorted by type */
1489 if (sort_token(rules, &rule_tmp) != 0)
1490 goto invalid;
1491
1492 return 0;
c7521974 1493invalid:
baa30fbc 1494 log_error("invalid rule '%s:%u'\n", filename, lineno);
912541b0 1495 return -1;
c7521974
KS		 1496}
1497
775f8b3c 1498static int parse_file(struct udev_rules *rules, const char *filename)
c7521974 1499{
912541b0
KS		 1500 FILE *f;
1501 unsigned int first_token;
775f8b3c 1502 unsigned int filename_off;
912541b0
KS		 1503 char line[UTIL_LINE_SIZE];
1504 int line_nr = 0;
1505 unsigned int i;
1506
775f8b3c
KS		 1507 if (null_or_empty_path(filename)) {
1508 log_debug("skip empty file: %s\n", filename);
1509 return 0;
1510 }
1511 log_debug("read rules file: %s\n", filename);
912541b0 1512
47ef94ac 1513 f = fopen(filename, "re");
912541b0
KS		 1514 if (f == NULL)
1515 return -1;
1516
1517 first_token = rules->token_cur;
915bf0f6 1518 filename_off = rules_add_string(rules, filename);
912541b0
KS		 1519
1520 while (fgets(line, sizeof(line), f) != NULL) {
1521 char *key;
1522 size_t len;
1523
1524 /* skip whitespace */
1525 line_nr++;
1526 key = line;
1527 while (isspace(key[0]))
1528 key++;
1529
1530 /* comment */
1531 if (key[0] == '#')
1532 continue;
1533
1534 len = strlen(line);
1535 if (len < 3)
1536 continue;
1537
1538 /* continue reading if backslash+newline is found */
1539 while (line[len-2] == '\\') {
1540 if (fgets(&line[len-2], (sizeof(line)-len)+2, f) == NULL)
1541 break;
1542 if (strlen(&line[len-2]) < 2)
1543 break;
1544 line_nr++;
1545 len = strlen(line);
1546 }
1547
1548 if (len+1 >= sizeof(line)) {
baa30fbc 1549 log_error("line too long '%s':%u, ignored\n", filename, line_nr);
912541b0
KS		 1550 continue;
1551 }
1552 add_rule(rules, key, filename, filename_off, line_nr);
1553 }
1554 fclose(f);
1555
1556 /* link GOTOs to LABEL rules in this file to be able to fast-forward */
1557 for (i = first_token+1; i < rules->token_cur; i++) {
1558 if (rules->tokens[i].type == TK_A_GOTO) {
915bf0f6 1559 char *label = rules_str(rules, rules->tokens[i].key.value_off);
912541b0
KS		 1560 unsigned int j;
1561
1562 for (j = i+1; j < rules->token_cur; j++) {
1563 if (rules->tokens[j].type != TK_RULE)
1564 continue;
1565 if (rules->tokens[j].rule.label_off == 0)
1566 continue;
915bf0f6 1567 if (!streq(label, rules_str(rules, rules->tokens[j].rule.label_off)))
912541b0
KS		 1568 continue;
1569 rules->tokens[i].key.rule_goto = j;
1570 break;
1571 }
1572 if (rules->tokens[i].key.rule_goto == 0)
baa30fbc 1573 log_error("GOTO '%s' has no matching label in: '%s'\n", label, filename);
912541b0
KS		 1574 }
1575 }
1576 return 0;
c7521974
KS		 1577}
1578
d7ddce18 1579struct udev_rules *udev_rules_new(struct udev *udev, int resolve_names)
c7521974 1580{
912541b0
KS		 1581 struct udev_rules *rules;
1582 struct udev_list file_list;
912541b0 1583 struct token end_token;
775f8b3c
KS		 1584 char **files, **f;
1585 int r;
912541b0
KS		 1586
1587 rules = calloc(1, sizeof(struct udev_rules));
1588 if (rules == NULL)
1589 return NULL;
1590 rules->udev = udev;
1591 rules->resolve_names = resolve_names;
1592 udev_list_init(udev, &file_list, true);
1593
1594 /* init token array and string buffer */
1595 rules->tokens = malloc(PREALLOC_TOKEN * sizeof(struct token));
0820a4f0
VP		 1596 if (rules->tokens == NULL)
1597 return udev_rules_unref(rules);
912541b0
KS		 1598 rules->token_max = PREALLOC_TOKEN;
1599
915bf0f6
KS		 1600 rules->strbuf = strbuf_new();
1601 if (!rules->strbuf)
0820a4f0
VP		 1602 return udev_rules_unref(rules);
1603
ff944daa 1604 rules->dirs = strv_new("/etc/udev/rules.d",
4cb72937
KS		 1605 "/run/udev/rules.d",
1606 UDEVLIBEXECDIR "/rules.d",
775f8b3c
KS		 1607 NULL);
1608 if (!rules->dirs) {
1609 log_error("failed to build config directory array");
0820a4f0 1610 return udev_rules_unref(rules);
775f8b3c 1611 }
9eb977db 1612 if (!path_strv_canonicalize(rules->dirs)) {
775f8b3c 1613 log_error("failed to canonicalize config directories\n");
0820a4f0 1614 return udev_rules_unref(rules);
775f8b3c
KS		 1615 }
1616 strv_uniq(rules->dirs);
3b8c1cb0 1617
9c3fd04e 1618 rules->dirs_ts_usec = calloc(strv_length(rules->dirs), sizeof(usec_t));
0820a4f0
VP		 1619 if(!rules->dirs_ts_usec)
1620 return udev_rules_unref(rules);
3b8c1cb0
KS		 1621 udev_rules_check_timestamp(rules);
1622
7850b3b8 1623 r = conf_files_list_strv(&files, ".rules", NULL, (const char **)rules->dirs);
775f8b3c
KS		 1624 if (r < 0) {
1625 log_error("failed to enumerate rules files: %s\n", strerror(-r));
0820a4f0 1626 return udev_rules_unref(rules);
912541b0
KS		 1627 }
1628
775f8b3c
KS		 1629 /*
1630 * The offset value in the rules strct is limited; add all
1631 * rules file names to the beginning of the string buffer.
1632 */
1633 STRV_FOREACH(f, files)
915bf0f6 1634 rules_add_string(rules, *f);
912541b0 1635
775f8b3c
KS		 1636 STRV_FOREACH(f, files)
1637 parse_file(rules, *f);
1638
1639 strv_free(files);
912541b0
KS		 1640
1641 memset(&end_token, 0x00, sizeof(struct token));
1642 end_token.type = TK_END;
1643 add_token(rules, &end_token);
915bf0f6
KS		 1644 log_debug("rules contain %zu bytes tokens (%u * %zu bytes), %zu bytes strings\n",
1645 rules->token_max * sizeof(struct token), rules->token_max, sizeof(struct token), rules->strbuf->len);
912541b0 1646
915bf0f6
KS		 1647 /* cleanup temporary strbuf data */
1648 log_debug("%zu strings (%zu bytes), %zu de-duplicated (%zu bytes), %zu trie nodes used\n",
1649 rules->strbuf->in_count, rules->strbuf->in_len,
1650 rules->strbuf->dedup_count, rules->strbuf->dedup_len, rules->strbuf->nodes_count);
1651 strbuf_complete(rules->strbuf);
912541b0
KS		 1652
1653 /* cleanup uid/gid cache */
1654 free(rules->uids);
1655 rules->uids = NULL;
1656 rules->uids_cur = 0;
1657 rules->uids_max = 0;
1658 free(rules->gids);
1659 rules->gids = NULL;
1660 rules->gids_cur = 0;
1661 rules->gids_max = 0;
1662
1663 dump_rules(rules);
1664 return rules;
c7521974
KS		 1665}
1666
7c85d636 1667struct udev_rules *udev_rules_unref(struct udev_rules *rules)
c7521974 1668{
912541b0
KS		 1669 if (rules == NULL)
1670 return NULL;
1671 free(rules->tokens);
915bf0f6 1672 strbuf_cleanup(rules->strbuf);
912541b0
KS		 1673 free(rules->uids);
1674 free(rules->gids);
775f8b3c
KS		 1675 strv_free(rules->dirs);
1676 free(rules->dirs_ts_usec);
912541b0
KS		 1677 free(rules);
1678 return NULL;
c7521974 1679}
6880b25d 1680
6ada823a
KS		 1681bool udev_rules_check_timestamp(struct udev_rules *rules)
1682{
1683 unsigned int i;
1684 bool changed = false;
1685
da5d4bf6
KS		 1686 if (rules == NULL)
1687 goto out;
1688
775f8b3c 1689 for (i = 0; rules->dirs[i]; i++) {
6ada823a
KS		 1690 struct stat stats;
1691
775f8b3c 1692 if (stat(rules->dirs[i], &stats) < 0)
6ada823a
KS		 1693 continue;
1694
40fe8b11 1695 if (rules->dirs_ts_usec[i] == timespec_load(&stats.st_mtim))
6ada823a
KS		 1696 continue;
1697
1698 /* first check */
1699 if (rules->dirs_ts_usec[i] != 0) {
775f8b3c 1700 log_debug("reload - timestamp of '%s' changed\n", rules->dirs[i]);
6ada823a
KS		 1701 changed = true;
1702 }
1703
1704 /* update timestamp */
40fe8b11 1705 rules->dirs_ts_usec[i] = timespec_load(&stats.st_mtim);
6ada823a 1706 }
da5d4bf6 1707out:
6ada823a
KS		 1708 return changed;
1709}
1710
6880b25d
KS		 1711static int match_key(struct udev_rules *rules, struct token *token, const char *val)
1712{
915bf0f6 1713 char *key_value = rules_str(rules, token->key.value_off);
912541b0
KS		 1714 char *pos;
1715 bool match = false;
1716
1717 if (val == NULL)
1718 val = "";
1719
1720 switch (token->key.glob) {
1721 case GL_PLAIN:
33502ffe 1722 match = (streq(key_value, val));
912541b0
KS		 1723 break;
1724 case GL_GLOB:
1725 match = (fnmatch(key_value, val, 0) == 0);
1726 break;
1727 case GL_SPLIT:
1728 {
33502ffe 1729 const char *s;
912541b0
KS		 1730 size_t len;
1731
915bf0f6 1732 s = rules_str(rules, token->key.value_off);
912541b0
KS		 1733 len = strlen(val);
1734 for (;;) {
1735 const char *next;
1736
33502ffe 1737 next = strchr(s, '|');
912541b0 1738 if (next != NULL) {
33502ffe 1739 size_t matchlen = (size_t)(next - s);
912541b0 1740
641906e9 1741 match = (matchlen == len && strneq(s, val, matchlen));
912541b0
KS		 1742 if (match)
1743 break;
1744 } else {
33502ffe 1745 match = (streq(s, val));
912541b0
KS		 1746 break;
1747 }
33502ffe 1748 s = &next[1];
912541b0
KS		 1749 }
1750 break;
1751 }
1752 case GL_SPLIT_GLOB:
1753 {
1754 char value[UTIL_PATH_SIZE];
1755
d5a89d7d 1756 strscpy(value, sizeof(value), rules_str(rules, token->key.value_off));
912541b0
KS		 1757 key_value = value;
1758 while (key_value != NULL) {
1759 pos = strchr(key_value, '|');
1760 if (pos != NULL) {
1761 pos[0] = '\0';
1762 pos = &pos[1];
1763 }
912541b0
KS		 1764 match = (fnmatch(key_value, val, 0) == 0);
1765 if (match)
1766 break;
1767 key_value = pos;
1768 }
1769 break;
1770 }
1771 case GL_SOMETHING:
1772 match = (val[0] != '\0');
1773 break;
1774 case GL_UNSET:
1775 return -1;
1776 }
1777
baa30fbc 1778 if (match && (token->key.op == OP_MATCH))
912541b0 1779 return 0;
baa30fbc 1780 if (!match && (token->key.op == OP_NOMATCH))
912541b0 1781 return 0;
912541b0 1782 return -1;
6880b25d
KS		 1783}
1784
1785static int match_attr(struct udev_rules *rules, struct udev_device *dev, struct udev_event *event, struct token *cur)
1786{
912541b0
KS		 1787 const char *name;
1788 char nbuf[UTIL_NAME_SIZE];
1789 const char *value;
1790 char vbuf[UTIL_NAME_SIZE];
1791 size_t len;
1792
915bf0f6 1793 name = rules_str(rules, cur->key.attr_off);
912541b0
KS		 1794 switch (cur->key.attrsubst) {
1795 case SB_FORMAT:
1796 udev_event_apply_format(event, name, nbuf, sizeof(nbuf));
1797 name = nbuf;
1798 /* fall through */
1799 case SB_NONE:
1800 value = udev_device_get_sysattr_value(dev, name);
1801 if (value == NULL)
1802 return -1;
1803 break;
1804 case SB_SUBSYS:
1805 if (util_resolve_subsys_kernel(event->udev, name, vbuf, sizeof(vbuf), 1) != 0)
1806 return -1;
1807 value = vbuf;
1808 break;
1809 default:
1810 return -1;
1811 }
1812
1813 /* remove trailing whitespace, if not asked to match for it */
1814 len = strlen(value);
1815 if (len > 0 && isspace(value[len-1])) {
1816 const char *key_value;
1817 size_t klen;
1818
915bf0f6 1819 key_value = rules_str(rules, cur->key.value_off);
912541b0
KS		 1820 klen = strlen(key_value);
1821 if (klen > 0 && !isspace(key_value[klen-1])) {
1822 if (value != vbuf) {
d5a89d7d 1823 strscpy(vbuf, sizeof(vbuf), value);
912541b0
KS		 1824 value = vbuf;
1825 }
1826 while (len > 0 && isspace(vbuf[--len]))
1827 vbuf[len] = '\0';
912541b0
KS		 1828 }
1829 }
1830
1831 return match_key(rules, cur, value);
6880b25d
KS		 1832}
1833
1834enum escape_type {
912541b0
KS		 1835 ESCAPE_UNSET,
1836 ESCAPE_NONE,
1837 ESCAPE_REPLACE,
6880b25d
KS		 1838};
1839
2181d30a 1840int udev_rules_apply_to_event(struct udev_rules *rules, struct udev_event *event, const sigset_t *sigmask)
6880b25d 1841{
912541b0
KS		 1842 struct token *cur;
1843 struct token *rule;
1844 enum escape_type esc = ESCAPE_UNSET;
1845 bool can_set_name;
1846
1847 if (rules->tokens == NULL)
1848 return -1;
1849
33502ffe 1850 can_set_name = ((!streq(udev_device_get_action(event->dev), "remove")) &&
912541b0
KS		 1851 (major(udev_device_get_devnum(event->dev)) > 0 ||
1852 udev_device_get_ifindex(event->dev) > 0));
1853
1854 /* loop through token list, match, run actions or forward to next rule */
1855 cur = &rules->tokens[0];
1856 rule = cur;
1857 for (;;) {
1858 dump_token(rules, cur);
1859 switch (cur->type) {
1860 case TK_RULE:
1861 /* current rule */
1862 rule = cur;
1863 /* possibly skip rules which want to set NAME, SYMLINK, OWNER, GROUP, MODE */
1864 if (!can_set_name && rule->rule.can_set_name)
1865 goto nomatch;
1866 esc = ESCAPE_UNSET;
1867 break;
1868 case TK_M_ACTION:
1869 if (match_key(rules, cur, udev_device_get_action(event->dev)) != 0)
1870 goto nomatch;
1871 break;
1872 case TK_M_DEVPATH:
1873 if (match_key(rules, cur, udev_device_get_devpath(event->dev)) != 0)
1874 goto nomatch;
1875 break;
1876 case TK_M_KERNEL:
1877 if (match_key(rules, cur, udev_device_get_sysname(event->dev)) != 0)
1878 goto nomatch;
1879 break;
1880 case TK_M_DEVLINK: {
912541b0
KS		 1881 struct udev_list_entry *list_entry;
1882 bool match = false;
1883
1884 udev_list_entry_foreach(list_entry, udev_device_get_devlinks_list_entry(event->dev)) {
1885 const char *devlink;
1886
4cb72937 1887 devlink = udev_list_entry_get_name(list_entry) + strlen("/dev/");
912541b0
KS		 1888 if (match_key(rules, cur, devlink) == 0) {
1889 match = true;
1890 break;
1891 }
1892 }
1893 if (!match)
1894 goto nomatch;
1895 break;
1896 }
1897 case TK_M_NAME:
1898 if (match_key(rules, cur, event->name) != 0)
1899 goto nomatch;
1900 break;
1901 case TK_M_ENV: {
915bf0f6 1902 const char *key_name = rules_str(rules, cur->key.attr_off);
912541b0
KS		 1903 const char *value;
1904
1905 value = udev_device_get_property_value(event->dev, key_name);
baa30fbc 1906 if (value == NULL)
912541b0 1907 value = "";
912541b0
KS		 1908 if (match_key(rules, cur, value))
1909 goto nomatch;
1910 break;
1911 }
1912 case TK_M_TAG: {
1913 struct udev_list_entry *list_entry;
1914 bool match = false;
1915
1916 udev_list_entry_foreach(list_entry, udev_device_get_tags_list_entry(event->dev)) {
915bf0f6 1917 if (streq(rules_str(rules, cur->key.value_off), udev_list_entry_get_name(list_entry))) {
912541b0
KS		 1918 match = true;
1919 break;
1920 }
1921 }
1922 if (!match && (cur->key.op != OP_NOMATCH))
1923 goto nomatch;
1924 break;
1925 }
1926 case TK_M_SUBSYSTEM:
1927 if (match_key(rules, cur, udev_device_get_subsystem(event->dev)) != 0)
1928 goto nomatch;
1929 break;
1930 case TK_M_DRIVER:
1931 if (match_key(rules, cur, udev_device_get_driver(event->dev)) != 0)
1932 goto nomatch;
1933 break;
1934 case TK_M_WAITFOR: {
1935 char filename[UTIL_PATH_SIZE];
1936 int found;
1937
915bf0f6 1938 udev_event_apply_format(event, rules_str(rules, cur->key.value_off), filename, sizeof(filename));
912541b0
KS		 1939 found = (wait_for_file(event->dev, filename, 10) == 0);
1940 if (!found && (cur->key.op != OP_NOMATCH))
1941 goto nomatch;
1942 break;
1943 }
1944 case TK_M_ATTR:
1945 if (match_attr(rules, event->dev, event, cur) != 0)
1946 goto nomatch;
1947 break;
1948 case TK_M_KERNELS:
1949 case TK_M_SUBSYSTEMS:
1950 case TK_M_DRIVERS:
1951 case TK_M_ATTRS:
1952 case TK_M_TAGS: {
1953 struct token *next;
1954
1955 /* get whole sequence of parent matches */
1956 next = cur;
1957 while (next->type > TK_M_PARENTS_MIN && next->type < TK_M_PARENTS_MAX)
1958 next++;
1959
1960 /* loop over parents */
1961 event->dev_parent = event->dev;
1962 for (;;) {
1963 struct token *key;
1964
912541b0
KS		 1965 /* loop over sequence of parent match keys */
1966 for (key = cur; key < next; key++ ) {
1967 dump_token(rules, key);
1968 switch(key->type) {
1969 case TK_M_KERNELS:
1970 if (match_key(rules, key, udev_device_get_sysname(event->dev_parent)) != 0)
1971 goto try_parent;
1972 break;
1973 case TK_M_SUBSYSTEMS:
1974 if (match_key(rules, key, udev_device_get_subsystem(event->dev_parent)) != 0)
1975 goto try_parent;
1976 break;
1977 case TK_M_DRIVERS:
1978 if (match_key(rules, key, udev_device_get_driver(event->dev_parent)) != 0)
1979 goto try_parent;
1980 break;
1981 case TK_M_ATTRS:
1982 if (match_attr(rules, event->dev_parent, event, key) != 0)
1983 goto try_parent;
1984 break;
1985 case TK_M_TAGS: {
915bf0f6 1986 bool match = udev_device_has_tag(event->dev_parent, rules_str(rules, cur->key.value_off));
912541b0
KS		 1987
1988 if (match && key->key.op == OP_NOMATCH)
1989 goto try_parent;
1990 if (!match && key->key.op == OP_MATCH)
1991 goto try_parent;
1992 break;
1993 }
1994 default:
1995 goto nomatch;
1996 }
912541b0 1997 }
912541b0
KS		 1998 break;
1999
2000 try_parent:
2001 event->dev_parent = udev_device_get_parent(event->dev_parent);
2002 if (event->dev_parent == NULL)
2003 goto nomatch;
2004 }
2005 /* move behind our sequence of parent match keys */
2006 cur = next;
2007 continue;
2008 }
2009 case TK_M_TEST: {
2010 char filename[UTIL_PATH_SIZE];
2011 struct stat statbuf;
2012 int match;
2013
915bf0f6 2014 udev_event_apply_format(event, rules_str(rules, cur->key.value_off), filename, sizeof(filename));
912541b0
KS		 2015 if (util_resolve_subsys_kernel(event->udev, filename, filename, sizeof(filename), 0) != 0) {
2016 if (filename[0] != '/') {
2017 char tmp[UTIL_PATH_SIZE];
2018
d5a89d7d
KS		 2019 strscpy(tmp, sizeof(tmp), filename);
2020 strscpyl(filename, sizeof(filename),
912541b0
KS		 2021 udev_device_get_syspath(event->dev), "/", tmp, NULL);
2022 }
2023 }
2024 attr_subst_subdir(filename, sizeof(filename));
2025
2026 match = (stat(filename, &statbuf) == 0);
baa30fbc 2027 if (match && cur->key.mode > 0)
912541b0 2028 match = ((statbuf.st_mode & cur->key.mode) > 0);
912541b0
KS		 2029 if (match && cur->key.op == OP_NOMATCH)
2030 goto nomatch;
2031 if (!match && cur->key.op == OP_MATCH)
2032 goto nomatch;
2033 break;
2034 }
2035 case TK_M_EVENT_TIMEOUT:
baa30fbc 2036 log_debug("OPTIONS event_timeout=%u\n", cur->key.event_timeout);
912541b0
KS		 2037 event->timeout_usec = cur->key.event_timeout * 1000 * 1000;
2038 break;
2039 case TK_M_PROGRAM: {
2040 char program[UTIL_PATH_SIZE];
2041 char **envp;
2042 char result[UTIL_PATH_SIZE];
2043
2044 free(event->program_result);
2045 event->program_result = NULL;
915bf0f6 2046 udev_event_apply_format(event, rules_str(rules, cur->key.value_off), program, sizeof(program));
912541b0 2047 envp = udev_device_get_properties_envp(event->dev);
baa30fbc
KS		 2048 log_debug("PROGRAM '%s' %s:%u\n",
2049 program,
915bf0f6 2050 rules_str(rules, rule->rule.filename_off),
baa30fbc 2051 rule->rule.filename_line);
912541b0
KS		 2052
2053 if (udev_event_spawn(event, program, envp, sigmask, result, sizeof(result)) < 0) {
2054 if (cur->key.op != OP_NOMATCH)
2055 goto nomatch;
2056 } else {
2057 int count;
2058
2059 util_remove_trailing_chars(result, '\n');
2060 if (esc == ESCAPE_UNSET || esc == ESCAPE_REPLACE) {
2061 count = util_replace_chars(result, UDEV_ALLOWED_CHARS_INPUT);
2062 if (count > 0)
baa30fbc 2063 log_debug("%i character(s) replaced\n" , count);
912541b0
KS		 2064 }
2065 event->program_result = strdup(result);
912541b0
KS		 2066 if (cur->key.op == OP_NOMATCH)
2067 goto nomatch;
2068 }
2069 break;
2070 }
2071 case TK_M_IMPORT_FILE: {
2072 char import[UTIL_PATH_SIZE];
2073
915bf0f6 2074 udev_event_apply_format(event, rules_str(rules, cur->key.value_off), import, sizeof(import));
912541b0
KS		 2075 if (import_file_into_properties(event->dev, import) != 0)
2076 if (cur->key.op != OP_NOMATCH)
2077 goto nomatch;
2078 break;
2079 }
2080 case TK_M_IMPORT_PROG: {
2081 char import[UTIL_PATH_SIZE];
2082
915bf0f6 2083 udev_event_apply_format(event, rules_str(rules, cur->key.value_off), import, sizeof(import));
baa30fbc
KS		 2084 log_debug("IMPORT '%s' %s:%u\n",
2085 import,
915bf0f6 2086 rules_str(rules, rule->rule.filename_off),
baa30fbc 2087 rule->rule.filename_line);
912541b0
KS		 2088
2089 if (import_program_into_properties(event, import, sigmask) != 0)
2090 if (cur->key.op != OP_NOMATCH)
2091 goto nomatch;
2092 break;
2093 }
2094 case TK_M_IMPORT_BUILTIN: {
2095 char command[UTIL_PATH_SIZE];
2096
2097 if (udev_builtin_run_once(cur->key.builtin_cmd)) {
2098 /* check if we ran already */
2099 if (event->builtin_run & (1 << cur->key.builtin_cmd)) {
baa30fbc
KS		 2100 log_debug("IMPORT builtin skip '%s' %s:%u\n",
2101 udev_builtin_name(cur->key.builtin_cmd),
915bf0f6 2102 rules_str(rules, rule->rule.filename_off),
baa30fbc 2103 rule->rule.filename_line);
912541b0
KS		 2104 /* return the result from earlier run */
2105 if (event->builtin_ret & (1 << cur->key.builtin_cmd))
2106 if (cur->key.op != OP_NOMATCH)
2107 goto nomatch;
2108 break;
2109 }
2110 /* mark as ran */
2111 event->builtin_run |= (1 << cur->key.builtin_cmd);
2112 }
2113
915bf0f6 2114 udev_event_apply_format(event, rules_str(rules, cur->key.value_off), command, sizeof(command));
baa30fbc
KS		 2115 log_debug("IMPORT builtin '%s' %s:%u\n",
2116 udev_builtin_name(cur->key.builtin_cmd),
915bf0f6 2117 rules_str(rules, rule->rule.filename_off),
baa30fbc 2118 rule->rule.filename_line);
912541b0
KS		 2119
2120 if (udev_builtin_run(event->dev, cur->key.builtin_cmd, command, false) != 0) {
2121 /* remember failure */
baa30fbc
KS		 2122 log_debug("IMPORT builtin '%s' returned non-zero\n",
2123 udev_builtin_name(cur->key.builtin_cmd));
912541b0
KS		 2124 event->builtin_ret |= (1 << cur->key.builtin_cmd);
2125 if (cur->key.op != OP_NOMATCH)
2126 goto nomatch;
2127 }
2128 break;
2129 }
2130 case TK_M_IMPORT_DB: {
915bf0f6 2131 const char *key = rules_str(rules, cur->key.value_off);
912541b0
KS		 2132 const char *value;
2133
2134 value = udev_device_get_property_value(event->dev_db, key);
2135 if (value != NULL) {
2136 struct udev_list_entry *entry;
2137
2138 entry = udev_device_add_property(event->dev, key, value);
2139 udev_list_entry_set_num(entry, true);
2140 } else {
2141 if (cur->key.op != OP_NOMATCH)
2142 goto nomatch;
2143 }
2144 break;
2145 }
2146 case TK_M_IMPORT_CMDLINE: {
2147 FILE *f;
2148 bool imported = false;
2149
47ef94ac 2150 f = fopen("/proc/cmdline", "re");
912541b0
KS		 2151 if (f != NULL) {
2152 char cmdline[4096];
2153
2154 if (fgets(cmdline, sizeof(cmdline), f) != NULL) {
915bf0f6 2155 const char *key = rules_str(rules, cur->key.value_off);
912541b0
KS		 2156 char *pos;
2157
2158 pos = strstr(cmdline, key);
2159 if (pos != NULL) {
2160 struct udev_list_entry *entry;
2161
2162 pos += strlen(key);
2163 if (pos[0] == '\0' || isspace(pos[0])) {
2164 /* we import simple flags as 'FLAG=1' */
2165 entry = udev_device_add_property(event->dev, key, "1");
2166 udev_list_entry_set_num(entry, true);
2167 imported = true;
2168 } else if (pos[0] == '=') {
2169 const char *value;
2170
2171 pos++;
2172 value = pos;
2173 while (pos[0] != '\0' && !isspace(pos[0]))
2174 pos++;
2175 pos[0] = '\0';
2176 entry = udev_device_add_property(event->dev, key, value);
2177 udev_list_entry_set_num(entry, true);
2178 imported = true;
2179 }
2180 }
2181 }
2182 fclose(f);
2183 }
2184 if (!imported && cur->key.op != OP_NOMATCH)
2185 goto nomatch;
2186 break;
2187 }
2188 case TK_M_IMPORT_PARENT: {
2189 char import[UTIL_PATH_SIZE];
2190
915bf0f6 2191 udev_event_apply_format(event, rules_str(rules, cur->key.value_off), import, sizeof(import));
912541b0
KS		 2192 if (import_parent_into_properties(event->dev, import) != 0)
2193 if (cur->key.op != OP_NOMATCH)
2194 goto nomatch;
2195 break;
2196 }
2197 case TK_M_RESULT:
2198 if (match_key(rules, cur, event->program_result) != 0)
2199 goto nomatch;
2200 break;
2201 case TK_A_STRING_ESCAPE_NONE:
2202 esc = ESCAPE_NONE;
2203 break;
2204 case TK_A_STRING_ESCAPE_REPLACE:
2205 esc = ESCAPE_REPLACE;
2206 break;
2207 case TK_A_DB_PERSIST:
2208 udev_device_set_db_persist(event->dev);
2209 break;
2210 case TK_A_INOTIFY_WATCH:
2211 if (event->inotify_watch_final)
2212 break;
2213 if (cur->key.op == OP_ASSIGN_FINAL)
2214 event->inotify_watch_final = true;
2215 event->inotify_watch = cur->key.watch;
2216 break;
2217 case TK_A_DEVLINK_PRIO:
2218 udev_device_set_devlink_priority(event->dev, cur->key.devlink_prio);
2219 break;
2220 case TK_A_OWNER: {
2221 char owner[UTIL_NAME_SIZE];
2222
2223 if (event->owner_final)
2224 break;
2225 if (cur->key.op == OP_ASSIGN_FINAL)
2226 event->owner_final = true;
915bf0f6 2227 udev_event_apply_format(event, rules_str(rules, cur->key.value_off), owner, sizeof(owner));
1edefa4f 2228 event->owner_set = true;
912541b0 2229 event->uid = util_lookup_user(event->udev, owner);
baa30fbc
KS		 2230 log_debug("OWNER %u %s:%u\n",
2231 event->uid,
915bf0f6 2232 rules_str(rules, rule->rule.filename_off),
baa30fbc 2233 rule->rule.filename_line);
912541b0
KS		 2234 break;
2235 }
2236 case TK_A_GROUP: {
2237 char group[UTIL_NAME_SIZE];
2238
2239 if (event->group_final)
2240 break;
2241 if (cur->key.op == OP_ASSIGN_FINAL)
2242 event->group_final = true;
915bf0f6 2243 udev_event_apply_format(event, rules_str(rules, cur->key.value_off), group, sizeof(group));
1edefa4f 2244 event->group_set = true;
912541b0 2245 event->gid = util_lookup_group(event->udev, group);
baa30fbc
KS		 2246 log_debug("GROUP %u %s:%u\n",
2247 event->gid,
915bf0f6 2248 rules_str(rules, rule->rule.filename_off),
baa30fbc 2249 rule->rule.filename_line);
912541b0
KS		 2250 break;
2251 }
2252 case TK_A_MODE: {
2253 char mode_str[UTIL_NAME_SIZE];
2254 mode_t mode;
2255 char *endptr;
2256
2257 if (event->mode_final)
2258 break;
915bf0f6 2259 udev_event_apply_format(event, rules_str(rules, cur->key.value_off), mode_str, sizeof(mode_str));
912541b0
KS		 2260 mode = strtol(mode_str, &endptr, 8);
2261 if (endptr[0] != '\0') {
baa30fbc 2262 log_error("ignoring invalid mode '%s'\n", mode_str);
912541b0
KS		 2263 break;
2264 }
2265 if (cur->key.op == OP_ASSIGN_FINAL)
2266 event->mode_final = true;
2267 event->mode_set = true;
2268 event->mode = mode;
baa30fbc
KS		 2269 log_debug("MODE %#o %s:%u\n",
2270 event->mode,
915bf0f6 2271 rules_str(rules, rule->rule.filename_off),
baa30fbc 2272 rule->rule.filename_line);
912541b0
KS		 2273 break;
2274 }
2275 case TK_A_OWNER_ID:
2276 if (event->owner_final)
2277 break;
2278 if (cur->key.op == OP_ASSIGN_FINAL)
2279 event->owner_final = true;
1edefa4f 2280 event->owner_set = true;
912541b0 2281 event->uid = cur->key.uid;
baa30fbc
KS		 2282 log_debug("OWNER %u %s:%u\n",
2283 event->uid,
915bf0f6 2284 rules_str(rules, rule->rule.filename_off),
baa30fbc 2285 rule->rule.filename_line);
912541b0
KS		 2286 break;
2287 case TK_A_GROUP_ID:
2288 if (event->group_final)
2289 break;
2290 if (cur->key.op == OP_ASSIGN_FINAL)
2291 event->group_final = true;
1edefa4f 2292 event->group_set = true;
912541b0 2293 event->gid = cur->key.gid;
baa30fbc
KS		 2294 log_debug("GROUP %u %s:%u\n",
2295 event->gid,
915bf0f6 2296 rules_str(rules, rule->rule.filename_off),
baa30fbc 2297 rule->rule.filename_line);
912541b0
KS		 2298 break;
2299 case TK_A_MODE_ID:
2300 if (event->mode_final)
2301 break;
2302 if (cur->key.op == OP_ASSIGN_FINAL)
2303 event->mode_final = true;
2304 event->mode_set = true;
2305 event->mode = cur->key.mode;
baa30fbc
KS		 2306 log_debug("MODE %#o %s:%u\n",
2307 event->mode,
915bf0f6 2308 rules_str(rules, rule->rule.filename_off),
baa30fbc 2309 rule->rule.filename_line);
912541b0
KS		 2310 break;
2311 case TK_A_ENV: {
915bf0f6
KS		 2312 const char *name = rules_str(rules, cur->key.attr_off);
2313 char *value = rules_str(rules, cur->key.value_off);
07845c14
KS		 2314 char value_new[UTIL_NAME_SIZE];
2315 const char *value_old = NULL;
2316 struct udev_list_entry *entry;
912541b0 2317
07845c14
KS		 2318 if (value[0] == '\0') {
2319 if (cur->key.op == OP_ADD)
2320 break;
912541b0 2321 udev_device_add_property(event->dev, name, NULL);
07845c14 2322 break;
912541b0 2323 }
07845c14
KS		 2324
2325 if (cur->key.op == OP_ADD)
2326 value_old = udev_device_get_property_value(event->dev, name);
2327 if (value_old) {
2328 char temp[UTIL_NAME_SIZE];
2329
2330 /* append value separated by space */
2331 udev_event_apply_format(event, value, temp, sizeof(temp));
d5a89d7d 2332 strscpyl(value_new, sizeof(value_new), value_old, " ", temp, NULL);
07845c14
KS		 2333 } else
2334 udev_event_apply_format(event, value, value_new, sizeof(value_new));
2335
2336 entry = udev_device_add_property(event->dev, name, value_new);
2337 /* store in db, skip private keys */
2338 if (name[0] != '.')
2339 udev_list_entry_set_num(entry, true);
912541b0
KS		 2340 break;
2341 }
2342 case TK_A_TAG: {
2343 char tag[UTIL_PATH_SIZE];
2344 const char *p;
2345
915bf0f6 2346 udev_event_apply_format(event, rules_str(rules, cur->key.value_off), tag, sizeof(tag));
912541b0
KS		 2347 if (cur->key.op == OP_ASSIGN || cur->key.op == OP_ASSIGN_FINAL)
2348 udev_device_cleanup_tags_list(event->dev);
2349 for (p = tag; *p != '\0'; p++) {
2350 if ((*p >= 'a' && *p <= 'z') ||
2351 (*p >= 'A' && *p <= 'Z') ||
2352 (*p >= '0' && *p <= '9') ||
2353 *p == '-' || *p == '_')
2354 continue;
baa30fbc 2355 log_error("ignoring invalid tag name '%s'\n", tag);
912541b0
KS		 2356 break;
2357 }
2358 udev_device_add_tag(event->dev, tag);
2359 break;
2360 }
2361 case TK_A_NAME: {
915bf0f6 2362 const char *name = rules_str(rules, cur->key.value_off);
0ecfcbd4 2363
912541b0
KS		 2364 char name_str[UTIL_PATH_SIZE];
2365 int count;
2366
2367 if (event->name_final)
2368 break;
2369 if (cur->key.op == OP_ASSIGN_FINAL)
2370 event->name_final = true;
2371 udev_event_apply_format(event, name, name_str, sizeof(name_str));
2372 if (esc == ESCAPE_UNSET || esc == ESCAPE_REPLACE) {
2373 count = util_replace_chars(name_str, "/");
2374 if (count > 0)
baa30fbc 2375 log_debug("%i character(s) replaced\n", count);
912541b0 2376 }
6ada823a 2377 if (major(udev_device_get_devnum(event->dev)) &&
4cb72937 2378 (!streq(name_str, udev_device_get_devnode(event->dev) + strlen("/dev/")))) {
6ada823a
KS		 2379 log_error("NAME=\"%s\" ignored, kernel device nodes "
2380 "can not be renamed; please fix it in %s:%u\n", name,
915bf0f6 2381 rules_str(rules, rule->rule.filename_off), rule->rule.filename_line);
6ada823a 2382 break;
0ecfcbd4 2383 }
912541b0
KS		 2384 free(event->name);
2385 event->name = strdup(name_str);
baa30fbc
KS		 2386 log_debug("NAME '%s' %s:%u\n",
2387 event->name,
915bf0f6 2388 rules_str(rules, rule->rule.filename_off),
baa30fbc 2389 rule->rule.filename_line);
912541b0
KS		 2390 break;
2391 }
2392 case TK_A_DEVLINK: {
2393 char temp[UTIL_PATH_SIZE];
2394 char filename[UTIL_PATH_SIZE];
2395 char *pos, *next;
2396 int count = 0;
2397
2398 if (event->devlink_final)
2399 break;
2400 if (major(udev_device_get_devnum(event->dev)) == 0)
2401 break;
2402 if (cur->key.op == OP_ASSIGN_FINAL)
2403 event->devlink_final = true;
2404 if (cur->key.op == OP_ASSIGN || cur->key.op == OP_ASSIGN_FINAL)
2405 udev_device_cleanup_devlinks_list(event->dev);
2406
2407 /* allow multiple symlinks separated by spaces */
915bf0f6 2408 udev_event_apply_format(event, rules_str(rules, cur->key.value_off), temp, sizeof(temp));
912541b0
KS		 2409 if (esc == ESCAPE_UNSET)
2410 count = util_replace_chars(temp, "/ ");
2411 else if (esc == ESCAPE_REPLACE)
2412 count = util_replace_chars(temp, "/");
2413 if (count > 0)
baa30fbc 2414 log_debug("%i character(s) replaced\n" , count);
912541b0
KS		 2415 pos = temp;
2416 while (isspace(pos[0]))
2417 pos++;
2418 next = strchr(pos, ' ');
2419 while (next != NULL) {
2420 next[0] = '\0';
baa30fbc 2421 log_debug("LINK '%s' %s:%u\n", pos,
915bf0f6 2422 rules_str(rules, rule->rule.filename_off), rule->rule.filename_line);
d5a89d7d 2423 strscpyl(filename, sizeof(filename), "/dev/", pos, NULL);
8a173387 2424 udev_device_add_devlink(event->dev, filename);
912541b0
KS		 2425 while (isspace(next[1]))
2426 next++;
2427 pos = &next[1];
2428 next = strchr(pos, ' ');
2429 }
2430 if (pos[0] != '\0') {
baa30fbc 2431 log_debug("LINK '%s' %s:%u\n", pos,
915bf0f6 2432 rules_str(rules, rule->rule.filename_off), rule->rule.filename_line);
d5a89d7d 2433 strscpyl(filename, sizeof(filename), "/dev/", pos, NULL);
8a173387 2434 udev_device_add_devlink(event->dev, filename);
912541b0
KS		 2435 }
2436 break;
2437 }
2438 case TK_A_ATTR: {
915bf0f6 2439 const char *key_name = rules_str(rules, cur->key.attr_off);
912541b0
KS		 2440 char attr[UTIL_PATH_SIZE];
2441 char value[UTIL_NAME_SIZE];
2442 FILE *f;
2443
2444 if (util_resolve_subsys_kernel(event->udev, key_name, attr, sizeof(attr), 0) != 0)
d5a89d7d 2445 strscpyl(attr, sizeof(attr), udev_device_get_syspath(event->dev), "/", key_name, NULL);
912541b0
KS		 2446 attr_subst_subdir(attr, sizeof(attr));
2447
915bf0f6 2448 udev_event_apply_format(event, rules_str(rules, cur->key.value_off), value, sizeof(value));
baa30fbc 2449 log_debug("ATTR '%s' writing '%s' %s:%u\n", attr, value,
915bf0f6 2450 rules_str(rules, rule->rule.filename_off),
baa30fbc 2451 rule->rule.filename_line);
47ef94ac 2452 f = fopen(attr, "we");
912541b0
KS		 2453 if (f != NULL) {
2454 if (fprintf(f, "%s", value) <= 0)
baa30fbc 2455 log_error("error writing ATTR{%s}: %m\n", attr);
912541b0
KS		 2456 fclose(f);
2457 } else {
baa30fbc 2458 log_error("error opening ATTR{%s} for writing: %m\n", attr);
912541b0
KS		 2459 }
2460 break;
2461 }
83cd6b75
KS		 2462 case TK_A_RUN_BUILTIN:
2463 case TK_A_RUN_PROGRAM: {
2464 struct udev_list_entry *entry;
2465
912541b0
KS		 2466 if (cur->key.op == OP_ASSIGN || cur->key.op == OP_ASSIGN_FINAL)
2467 udev_list_cleanup(&event->run_list);
baa30fbc 2468 log_debug("RUN '%s' %s:%u\n",
915bf0f6
KS		 2469 rules_str(rules, cur->key.value_off),
2470 rules_str(rules, rule->rule.filename_off),
baa30fbc 2471 rule->rule.filename_line);
915bf0f6 2472 entry = udev_list_entry_add(&event->run_list, rules_str(rules, cur->key.value_off), NULL);
83cd6b75 2473 udev_list_entry_set_num(entry, cur->key.builtin_cmd);
912541b0
KS		 2474 break;
2475 }
2476 case TK_A_GOTO:
2477 if (cur->key.rule_goto == 0)
2478 break;
2479 cur = &rules->tokens[cur->key.rule_goto];
2480 continue;
2481 case TK_END:
2482 return 0;
2483
2484 case TK_M_PARENTS_MIN:
2485 case TK_M_PARENTS_MAX:
2486 case TK_M_MAX:
2487 case TK_UNSET:
baa30fbc 2488 log_error("wrong type %u\n", cur->type);
912541b0
KS		 2489 goto nomatch;
2490 }
2491
2492 cur++;
2493 continue;
2494 nomatch:
2495 /* fast-forward to next rule */
2496 cur = rule + rule->rule.token_count;
912541b0 2497 }
6880b25d 2498}
761dfddc 2499
84b6ad70 2500int udev_rules_apply_static_dev_perms(struct udev_rules *rules)
761dfddc 2501{
912541b0
KS		 2502 struct token *cur;
2503 struct token *rule;
2504 uid_t uid = 0;
2505 gid_t gid = 0;
2506 mode_t mode = 0;
84b6ad70
TG		 2507 _cleanup_strv_free_ char **tags = NULL;
2508 char **t;
2509 FILE *f = NULL;
2510 _cleanup_free_ char *path = NULL;
2511 int r = 0;
912541b0
KS		 2512
2513 if (rules->tokens == NULL)
84b6ad70 2514 return 0;
912541b0
KS		 2515
2516 cur = &rules->tokens[0];
2517 rule = cur;
2518 for (;;) {
2519 switch (cur->type) {
2520 case TK_RULE:
2521 /* current rule */
2522 rule = cur;
2523
2524 /* skip rules without a static_node tag */
2525 if (!rule->rule.has_static_node)
2526 goto next;
2527
2528 uid = 0;
2529 gid = 0;
2530 mode = 0;
84b6ad70
TG		 2531 strv_free(tags);
2532 tags = NULL;
912541b0
KS		 2533 break;
2534 case TK_A_OWNER_ID:
2535 uid = cur->key.uid;
2536 break;
2537 case TK_A_GROUP_ID:
2538 gid = cur->key.gid;
2539 break;
2540 case TK_A_MODE_ID:
2541 mode = cur->key.mode;
84b6ad70
TG		 2542 break;
2543 case TK_A_TAG:
2544 r = strv_extend(&tags, rules_str(rules, cur->key.value_off));
2545 if (r < 0)
2546 goto finish;
2547
912541b0
KS		 2548 break;
2549 case TK_A_STATIC_NODE: {
84b6ad70
TG		 2550 char device_node[UTIL_PATH_SIZE];
2551 char tags_dir[UTIL_PATH_SIZE];
2552 char tag_symlink[UTIL_PATH_SIZE];
912541b0
KS		 2553 struct stat stats;
2554
2555 /* we assure, that the permissions tokens are sorted before the static token */
84b6ad70 2556 if (mode == 0 && uid == 0 && gid == 0 && tags == NULL)
912541b0 2557 goto next;
84b6ad70
TG		 2558 strscpyl(device_node, sizeof(device_node), "/dev/", rules_str(rules, cur->key.value_off), NULL);
2559 if (stat(device_node, &stats) != 0)
912541b0
KS		 2560 goto next;
2561 if (!S_ISBLK(stats.st_mode) && !S_ISCHR(stats.st_mode))
2562 goto next;
84b6ad70
TG		 2563
2564 if (tags) {
2565 /* Export the tags to a directory as symlinks, allowing otherwise dead nodes to be tagged */
2566
2567 STRV_FOREACH(t, tags) {
2568 _cleanup_free_ char *unescaped_filename = NULL;
2569
2570 strscpyl(tags_dir, sizeof(tags_dir), "/run/udev/static_node-tags/", *t, "/", NULL);
2571 r = mkdir_p(tags_dir, 0755);
2572 if (r < 0) {
2573 log_error("failed to create %s: %s\n", tags_dir, strerror(-r));
2574 return r;
2575 }
2576
2577 unescaped_filename = xescape(rules_str(rules, cur->key.value_off), "/.");
2578
2579 strscpyl(tag_symlink, sizeof(tag_symlink), tags_dir, unescaped_filename, NULL);
2580 r = symlink(device_node, tag_symlink);
2581 if (r < 0 && errno != EEXIST) {
2582 log_error("failed to create symlink %s -> %s: %s\n", tag_symlink, device_node, strerror(errno));
2583 return -errno;
2584 } else
2585 r = 0;
2586 }
2587 }
2588
912541b0
KS		 2589 if (mode == 0) {
2590 if (gid > 0)
2591 mode = 0660;
2592 else
2593 mode = 0600;
2594 }
2595 if (mode != (stats.st_mode & 01777)) {
490f0087
TG		 2596 r = chmod(device_node, mode);
2597 if (r < 0) {
2598 log_error("failed to chmod '%s' %#o\n", device_node, mode);
2599 return -errno;
2600 } else
2601 log_debug("chmod '%s' %#o\n", device_node, mode);
912541b0
KS		 2602 }
2603
2604 if ((uid != 0 && uid != stats.st_uid) || (gid != 0 && gid != stats.st_gid)) {
490f0087
TG		 2605 r = chown(device_node, uid, gid);
2606 if (r < 0) {
2607 log_error("failed to chown '%s' %u %u \n", device_node, uid, gid);
2608 return -errno;
2609 } else
2610 log_debug("chown '%s' %u %u\n", device_node, uid, gid);
912541b0
KS		 2611 }
2612
84b6ad70 2613 utimensat(AT_FDCWD, device_node, NULL, 0);
912541b0
KS		 2614 break;
2615 }
2616 case TK_END:
84b6ad70 2617 goto finish;
912541b0
KS		 2618 }
2619
2620 cur++;
2621 continue;
761dfddc 2622next:
912541b0
KS		 2623 /* fast-forward to next rule */
2624 cur = rule + rule->rule.token_count;
2625 continue;
2626 }
84b6ad70
TG		 2627
2628finish:
2629 if (f) {
2630 fflush(f);
2631 fchmod(fileno(f), 0644);
2632 if (ferror(f) || rename(path, "/run/udev/static_node-tags") < 0) {
2633 r = -errno;
2634 unlink("/run/udev/static_node-tags");
2635 unlink(path);
2636 }
2637 fclose(f);
2638 }
2639
2640 return r;
761dfddc 2641}
Unnamed repository; edit this file 'description' to name the repository.