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[thirdparty/systemd.git] / src / udev / udev-rules.c
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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"
1291bc89 37#include "util.h"
2232cac8 38
a1525d17 39#define PREALLOC_TOKEN 2048
c7521974 40
4052400f 41struct uid_gid {
912541b0
KS		 42 unsigned int name_off;
43 union {
a1525d17
KS		 44 uid_t uid;
45 gid_t gid;
912541b0 46 };
4052400f
KS		 47};
48
4052400f 49struct udev_rules {
912541b0 50 struct udev *udev;
775f8b3c 51 char **dirs;
40fe8b11 52 usec_t *dirs_ts_usec;
912541b0
KS		 53 int resolve_names;
54
55 /* every key in the rules file becomes a token */
56 struct token *tokens;
57 unsigned int token_cur;
58 unsigned int token_max;
59
ab06eef8 60 /* all key strings are copied and de-duplicated in a single continuous string buffer */
915bf0f6 61 struct strbuf *strbuf;
912541b0
KS		 62
63 /* during rule parsing, uid/gid lookup results are cached */
64 struct uid_gid *uids;
65 unsigned int uids_cur;
66 unsigned int uids_max;
67 struct uid_gid *gids;
68 unsigned int gids_cur;
69 unsigned int gids_max;
4052400f
KS		 70};
71
915bf0f6
KS		 72static char *rules_str(struct udev_rules *rules, unsigned int off) {
73 return rules->strbuf->buf + off;
74}
75
76static unsigned int rules_add_string(struct udev_rules *rules, const char *s) {
77 return strbuf_add_string(rules->strbuf, s, strlen(s));
78}
79
1449a55d 80/* KEY=="", KEY!="", KEY+="", KEY="", KEY:="" */
b0f7409f 81enum operation_type {
912541b0 82 OP_UNSET,
b0f7409f 83
912541b0
KS		 84 OP_MATCH,
85 OP_NOMATCH,
86 OP_MATCH_MAX,
b0f7409f 87
912541b0
KS		 88 OP_ADD,
89 OP_ASSIGN,
90 OP_ASSIGN_FINAL,
c7521974
KS		 91};
92
ac218d9c 93enum string_glob_type {
912541b0 94 GL_UNSET,
a1525d17 95 GL_PLAIN, /* no special chars */
912541b0 96 GL_GLOB, /* shell globs ?,*,[] */
a1525d17
KS		 97 GL_SPLIT, /* multi-value A|B */
98 GL_SPLIT_GLOB, /* multi-value with glob A*|B* */
99 GL_SOMETHING, /* commonly used "?*" */
ac218d9c
KS		 100};
101
32028733 102enum string_subst_type {
912541b0
KS		 103 SB_UNSET,
104 SB_NONE,
105 SB_FORMAT,
106 SB_SUBSYS,
32028733
KS		 107};
108
154a7b84 109/* tokens of a rule are sorted/handled in this order */
6880b25d 110enum token_type {
912541b0
KS		 111 TK_UNSET,
112 TK_RULE,
113
a1525d17
KS		 114 TK_M_ACTION, /* val */
115 TK_M_DEVPATH, /* val */
116 TK_M_KERNEL, /* val */
117 TK_M_DEVLINK, /* val */
118 TK_M_NAME, /* val */
119 TK_M_ENV, /* val, attr */
120 TK_M_TAG, /* val */
121 TK_M_SUBSYSTEM, /* val */
122 TK_M_DRIVER, /* val */
123 TK_M_WAITFOR, /* val */
124 TK_M_ATTR, /* val, attr */
912541b0
KS		 125
126 TK_M_PARENTS_MIN,
a1525d17 127 TK_M_KERNELS, /* val */
912541b0 128 TK_M_SUBSYSTEMS, /* val */
a1525d17
KS		 129 TK_M_DRIVERS, /* val */
130 TK_M_ATTRS, /* val, attr */
131 TK_M_TAGS, /* val */
912541b0
KS		 132 TK_M_PARENTS_MAX,
133
a1525d17
KS		 134 TK_M_TEST, /* val, mode_t */
135 TK_M_EVENT_TIMEOUT, /* int */
136 TK_M_PROGRAM, /* val */
137 TK_M_IMPORT_FILE, /* val */
138 TK_M_IMPORT_PROG, /* val */
139 TK_M_IMPORT_BUILTIN, /* val */
140 TK_M_IMPORT_DB, /* val */
141 TK_M_IMPORT_CMDLINE, /* val */
142 TK_M_IMPORT_PARENT, /* val */
143 TK_M_RESULT, /* val */
912541b0
KS		 144 TK_M_MAX,
145
146 TK_A_STRING_ESCAPE_NONE,
147 TK_A_STRING_ESCAPE_REPLACE,
148 TK_A_DB_PERSIST,
a1525d17
KS		 149 TK_A_INOTIFY_WATCH, /* int */
150 TK_A_DEVLINK_PRIO, /* int */
151 TK_A_OWNER, /* val */
152 TK_A_GROUP, /* val */
153 TK_A_MODE, /* val */
154 TK_A_OWNER_ID, /* uid_t */
155 TK_A_GROUP_ID, /* gid_t */
156 TK_A_MODE_ID, /* mode_t */
84b6ad70 157 TK_A_TAG, /* val */
a1525d17
KS		 158 TK_A_STATIC_NODE, /* val */
159 TK_A_ENV, /* val, attr */
a1525d17
KS		 160 TK_A_NAME, /* val */
161 TK_A_DEVLINK, /* val */
162 TK_A_ATTR, /* val, attr */
83cd6b75
KS		 163 TK_A_RUN_BUILTIN, /* val, bool */
164 TK_A_RUN_PROGRAM, /* val, bool */
a1525d17 165 TK_A_GOTO, /* size_t */
912541b0
KS		 166
167 TK_END,
c7521974
KS		 168};
169
3f3aa9f5 170/* we try to pack stuff in a way that we take only 12 bytes per token */
4052400f 171struct token {
912541b0
KS		 172 union {
173 unsigned char type; /* same in rule and key */
174 struct {
175 enum token_type type:8;
176 bool can_set_name:1;
177 bool has_static_node:1;
178 unsigned int unused:6;
179 unsigned short token_count;
180 unsigned int label_off;
181 unsigned short filename_off;
182 unsigned short filename_line;
183 } rule;
184 struct {
185 enum token_type type:8;
186 enum operation_type op:8;
187 enum string_glob_type glob:8;
188 enum string_subst_type subst:4;
189 enum string_subst_type attrsubst:4;
190 unsigned int value_off;
191 union {
192 unsigned int attr_off;
912541b0
KS		 193 unsigned int rule_goto;
194 mode_t mode;
195 uid_t uid;
196 gid_t gid;
197 int devlink_prio;
198 int event_timeout;
199 int watch;
200 enum udev_builtin_cmd builtin_cmd;
201 };
202 } key;
203 };
4052400f
KS		 204};
205
912541b0 206#define MAX_TK 64
4052400f 207struct rule_tmp {
912541b0
KS		 208 struct udev_rules *rules;
209 struct token rule;
210 struct token token[MAX_TK];
211 unsigned int token_cur;
4052400f
KS		 212};
213
baa30fbc 214#ifdef DEBUG
5d6a1fa6
KS		 215static const char *operation_str(enum operation_type type)
216{
912541b0 217 static const char *operation_strs[] = {
a1525d17
KS		 218 [OP_UNSET] = "UNSET",
219 [OP_MATCH] = "match",
220 [OP_NOMATCH] = "nomatch",
912541b0
KS		 221 [OP_MATCH_MAX] = "MATCH_MAX",
222
a1525d17
KS		 223 [OP_ADD] = "add",
224 [OP_ASSIGN] = "assign",
225 [OP_ASSIGN_FINAL] = "assign-final",
912541b0
KS		 226} ;
227
228 return operation_strs[type];
5d6a1fa6 229}
4052400f 230
5d6a1fa6
KS		 231static const char *string_glob_str(enum string_glob_type type)
232{
912541b0 233 static const char *string_glob_strs[] = {
a1525d17
KS		 234 [GL_UNSET] = "UNSET",
235 [GL_PLAIN] = "plain",
236 [GL_GLOB] = "glob",
237 [GL_SPLIT] = "split",
238 [GL_SPLIT_GLOB] = "split-glob",
239 [GL_SOMETHING] = "split-glob",
912541b0
KS		 240 };
241
242 return string_glob_strs[type];
5d6a1fa6
KS		 243}
244
245static const char *token_str(enum token_type type)
246{
912541b0 247 static const char *token_strs[] = {
a1525d17
KS		 248 [TK_UNSET] = "UNSET",
249 [TK_RULE] = "RULE",
912541b0 250
a1525d17 251 [TK_M_ACTION] = "M ACTION",
912541b0 252 [TK_M_DEVPATH] = "M DEVPATH",
a1525d17 253 [TK_M_KERNEL] = "M KERNEL",
912541b0 254 [TK_M_DEVLINK] = "M DEVLINK",
a1525d17
KS		 255 [TK_M_NAME] = "M NAME",
256 [TK_M_ENV] = "M ENV",
257 [TK_M_TAG] = "M TAG",
258 [TK_M_SUBSYSTEM] = "M SUBSYSTEM",
259 [TK_M_DRIVER] = "M DRIVER",
912541b0 260 [TK_M_WAITFOR] = "M WAITFOR",
a1525d17 261 [TK_M_ATTR] = "M ATTR",
912541b0 262
a1525d17 263 [TK_M_PARENTS_MIN] = "M PARENTS_MIN",
912541b0 264 [TK_M_KERNELS] = "M KERNELS",
a1525d17 265 [TK_M_SUBSYSTEMS] = "M SUBSYSTEMS",
912541b0 266 [TK_M_DRIVERS] = "M DRIVERS",
a1525d17
KS		 267 [TK_M_ATTRS] = "M ATTRS",
268 [TK_M_TAGS] = "M TAGS",
269 [TK_M_PARENTS_MAX] = "M PARENTS_MAX",
912541b0 270
a1525d17
KS		 271 [TK_M_TEST] = "M TEST",
272 [TK_M_EVENT_TIMEOUT] = "M EVENT_TIMEOUT",
912541b0 273 [TK_M_PROGRAM] = "M PROGRAM",
a1525d17
KS		 274 [TK_M_IMPORT_FILE] = "M IMPORT_FILE",
275 [TK_M_IMPORT_PROG] = "M IMPORT_PROG",
276 [TK_M_IMPORT_BUILTIN] = "M IMPORT_BUILTIN",
277 [TK_M_IMPORT_DB] = "M IMPORT_DB",
278 [TK_M_IMPORT_CMDLINE] = "M IMPORT_CMDLINE",
279 [TK_M_IMPORT_PARENT] = "M IMPORT_PARENT",
280 [TK_M_RESULT] = "M RESULT",
281 [TK_M_MAX] = "M MAX",
282
283 [TK_A_STRING_ESCAPE_NONE] = "A STRING_ESCAPE_NONE",
284 [TK_A_STRING_ESCAPE_REPLACE] = "A STRING_ESCAPE_REPLACE",
285 [TK_A_DB_PERSIST] = "A DB_PERSIST",
286 [TK_A_INOTIFY_WATCH] = "A INOTIFY_WATCH",
287 [TK_A_DEVLINK_PRIO] = "A DEVLINK_PRIO",
288 [TK_A_OWNER] = "A OWNER",
289 [TK_A_GROUP] = "A GROUP",
290 [TK_A_MODE] = "A MODE",
291 [TK_A_OWNER_ID] = "A OWNER_ID",
292 [TK_A_GROUP_ID] = "A GROUP_ID",
293 [TK_A_STATIC_NODE] = "A STATIC_NODE",
912541b0 294 [TK_A_MODE_ID] = "A MODE_ID",
a1525d17
KS		 295 [TK_A_ENV] = "A ENV",
296 [TK_A_TAG] = "A ENV",
297 [TK_A_NAME] = "A NAME",
912541b0 298 [TK_A_DEVLINK] = "A DEVLINK",
a1525d17 299 [TK_A_ATTR] = "A ATTR",
83cd6b75
KS		 300 [TK_A_RUN_BUILTIN] = "A RUN_BUILTIN",
301 [TK_A_RUN_PROGRAM] = "A RUN_PROGRAM",
a1525d17 302 [TK_A_GOTO] = "A GOTO",
912541b0 303
a1525d17 304 [TK_END] = "END",
912541b0
KS		 305 };
306
307 return token_strs[type];
5d6a1fa6 308}
c7521974 309
4052400f
KS		 310static void dump_token(struct udev_rules *rules, struct token *token)
311{
912541b0
KS		 312 enum token_type type = token->type;
313 enum operation_type op = token->key.op;
314 enum string_glob_type glob = token->key.glob;
915bf0f6 315 const char *value = str(rules, token->key.value_off);
912541b0
KS		 316 const char *attr = &rules->buf[token->key.attr_off];
317
318 switch (type) {
319 case TK_RULE:
320 {
321 const char *tks_ptr = (char *)rules->tokens;
322 const char *tk_ptr = (char *)token;
323 unsigned int idx = (tk_ptr - tks_ptr) / sizeof(struct token);
324
baa30fbc
KS		 325 log_debug("* RULE %s:%u, token: %u, count: %u, label: '%s'\n",
326 &rules->buf[token->rule.filename_off], token->rule.filename_line,
327 idx, token->rule.token_count,
328 &rules->buf[token->rule.label_off]);
912541b0
KS		 329 break;
330 }
331 case TK_M_ACTION:
332 case TK_M_DEVPATH:
333 case TK_M_KERNEL:
334 case TK_M_SUBSYSTEM:
335 case TK_M_DRIVER:
336 case TK_M_WAITFOR:
337 case TK_M_DEVLINK:
338 case TK_M_NAME:
339 case TK_M_KERNELS:
340 case TK_M_SUBSYSTEMS:
341 case TK_M_DRIVERS:
342 case TK_M_TAGS:
343 case TK_M_PROGRAM:
344 case TK_M_IMPORT_FILE:
345 case TK_M_IMPORT_PROG:
346 case TK_M_IMPORT_DB:
347 case TK_M_IMPORT_CMDLINE:
348 case TK_M_IMPORT_PARENT:
349 case TK_M_RESULT:
350 case TK_A_NAME:
351 case TK_A_DEVLINK:
352 case TK_A_OWNER:
353 case TK_A_GROUP:
354 case TK_A_MODE:
83cd6b75
KS		 355 case TK_A_RUN_BUILTIN:
356 case TK_A_RUN_PROGRAM:
baa30fbc
KS		 357 log_debug("%s %s '%s'(%s)\n",
358 token_str(type), operation_str(op), value, string_glob_str(glob));
912541b0
KS		 359 break;
360 case TK_M_IMPORT_BUILTIN:
baa30fbc 361 log_debug("%s %i '%s'\n", token_str(type), token->key.builtin_cmd, value);
912541b0
KS		 362 break;
363 case TK_M_ATTR:
364 case TK_M_ATTRS:
365 case TK_M_ENV:
366 case TK_A_ATTR:
367 case TK_A_ENV:
baa30fbc
KS		 368 log_debug("%s %s '%s' '%s'(%s)\n",
369 token_str(type), operation_str(op), attr, value, string_glob_str(glob));
912541b0
KS		 370 break;
371 case TK_M_TAG:
372 case TK_A_TAG:
baa30fbc 373 log_debug("%s %s '%s'\n", token_str(type), operation_str(op), value);
912541b0
KS		 374 break;
375 case TK_A_STRING_ESCAPE_NONE:
376 case TK_A_STRING_ESCAPE_REPLACE:
377 case TK_A_DB_PERSIST:
baa30fbc 378 log_debug("%s\n", token_str(type));
912541b0
KS		 379 break;
380 case TK_M_TEST:
baa30fbc
KS		 381 log_debug("%s %s '%s'(%s) %#o\n",
382 token_str(type), operation_str(op), value, string_glob_str(glob), token->key.mode);
912541b0
KS		 383 break;
384 case TK_A_INOTIFY_WATCH:
baa30fbc 385 log_debug("%s %u\n", token_str(type), token->key.watch);
912541b0
KS		 386 break;
387 case TK_A_DEVLINK_PRIO:
baa30fbc 388 log_debug("%s %u\n", token_str(type), token->key.devlink_prio);
912541b0
KS		 389 break;
390 case TK_A_OWNER_ID:
baa30fbc 391 log_debug("%s %s %u\n", token_str(type), operation_str(op), token->key.uid);
912541b0
KS		 392 break;
393 case TK_A_GROUP_ID:
baa30fbc 394 log_debug("%s %s %u\n", token_str(type), operation_str(op), token->key.gid);
912541b0
KS		 395 break;
396 case TK_A_MODE_ID:
baa30fbc 397 log_debug("%s %s %#o\n", token_str(type), operation_str(op), token->key.mode);
912541b0
KS		 398 break;
399 case TK_A_STATIC_NODE:
baa30fbc 400 log_debug("%s '%s'\n", token_str(type), value);
912541b0
KS		 401 break;
402 case TK_M_EVENT_TIMEOUT:
baa30fbc 403 log_debug("%s %u\n", token_str(type), token->key.event_timeout);
912541b0
KS		 404 break;
405 case TK_A_GOTO:
baa30fbc 406 log_debug("%s '%s' %u\n", token_str(type), value, token->key.rule_goto);
912541b0
KS		 407 break;
408 case TK_END:
baa30fbc 409 log_debug("* %s\n", token_str(type));
912541b0
KS		 410 break;
411 case TK_M_PARENTS_MIN:
412 case TK_M_PARENTS_MAX:
413 case TK_M_MAX:
414 case TK_UNSET:
baa30fbc 415 log_debug("unknown type %u\n", type);
912541b0
KS		 416 break;
417 }
4052400f 418}
154a7b84 419
4052400f
KS		 420static void dump_rules(struct udev_rules *rules)
421{
912541b0
KS		 422 unsigned int i;
423
baa30fbc
KS		 424 log_debug("dumping %u (%zu bytes) tokens, %u (%zu bytes) strings\n",
425 rules->token_cur,
426 rules->token_cur * sizeof(struct token),
427 rules->buf_count,
428 rules->buf_cur);
912541b0
KS		 429 for(i = 0; i < rules->token_cur; i++)
430 dump_token(rules, &rules->tokens[i]);
4052400f
KS		 431}
432#else
5d6a1fa6
KS		 433static inline const char *operation_str(enum operation_type type) { return NULL; }
434static inline const char *token_str(enum token_type type) { return NULL; }
4052400f
KS		 435static inline void dump_token(struct udev_rules *rules, struct token *token) {}
436static inline void dump_rules(struct udev_rules *rules) {}
baa30fbc 437#endif /* DEBUG */
c7521974 438
1449a55d
AJ		 439static int add_token(struct udev_rules *rules, struct token *token)
440{
912541b0
KS		 441 /* grow buffer if needed */
442 if (rules->token_cur+1 >= rules->token_max) {
443 struct token *tokens;
444 unsigned int add;
445
446 /* double the buffer size */
447 add = rules->token_max;
448 if (add < 8)
449 add = 8;
450
451 tokens = realloc(rules->tokens, (rules->token_max + add ) * sizeof(struct token));
452 if (tokens == NULL)
453 return -1;
912541b0
KS		 454 rules->tokens = tokens;
455 rules->token_max += add;
456 }
457 memcpy(&rules->tokens[rules->token_cur], token, sizeof(struct token));
458 rules->token_cur++;
459 return 0;
c7521974 460}
a27cd06c 461
154a7b84
KS		 462static uid_t add_uid(struct udev_rules *rules, const char *owner)
463{
912541b0
KS		 464 unsigned int i;
465 uid_t uid;
466 unsigned int off;
467
468 /* lookup, if we know it already */
469 for (i = 0; i < rules->uids_cur; i++) {
470 off = rules->uids[i].name_off;
915bf0f6 471 if (streq(rules_str(rules, off), owner)) {
912541b0 472 uid = rules->uids[i].uid;
912541b0
KS		 473 return uid;
474 }
475 }
476 uid = util_lookup_user(rules->udev, owner);
477
478 /* grow buffer if needed */
479 if (rules->uids_cur+1 >= rules->uids_max) {
480 struct uid_gid *uids;
481 unsigned int add;
482
483 /* double the buffer size */
484 add = rules->uids_max;
485 if (add < 1)
486 add = 8;
487
488 uids = realloc(rules->uids, (rules->uids_max + add ) * sizeof(struct uid_gid));
489 if (uids == NULL)
490 return uid;
912541b0
KS		 491 rules->uids = uids;
492 rules->uids_max += add;
493 }
494 rules->uids[rules->uids_cur].uid = uid;
915bf0f6 495 off = rules_add_string(rules, owner);
912541b0
KS		 496 if (off <= 0)
497 return uid;
498 rules->uids[rules->uids_cur].name_off = off;
499 rules->uids_cur++;
500 return uid;
154a7b84
KS		 501}
502
503static gid_t add_gid(struct udev_rules *rules, const char *group)
504{
912541b0
KS		 505 unsigned int i;
506 gid_t gid;
507 unsigned int off;
508
509 /* lookup, if we know it already */
510 for (i = 0; i < rules->gids_cur; i++) {
511 off = rules->gids[i].name_off;
915bf0f6 512 if (streq(rules_str(rules, off), group)) {
912541b0 513 gid = rules->gids[i].gid;
912541b0
KS		 514 return gid;
515 }
516 }
517 gid = util_lookup_group(rules->udev, group);
518
519 /* grow buffer if needed */
520 if (rules->gids_cur+1 >= rules->gids_max) {
521 struct uid_gid *gids;
522 unsigned int add;
523
524 /* double the buffer size */
525 add = rules->gids_max;
526 if (add < 1)
527 add = 8;
528
529 gids = realloc(rules->gids, (rules->gids_max + add ) * sizeof(struct uid_gid));
530 if (gids == NULL)
531 return gid;
912541b0
KS		 532 rules->gids = gids;
533 rules->gids_max += add;
534 }
535 rules->gids[rules->gids_cur].gid = gid;
915bf0f6 536 off = rules_add_string(rules, group);
912541b0
KS		 537 if (off <= 0)
538 return gid;
539 rules->gids[rules->gids_cur].name_off = off;
540 rules->gids_cur++;
541 return gid;
154a7b84
KS		 542}
543
bb144ed1 544static int import_property_from_string(struct udev_device *dev, char *line)
bd0ed2ff 545{
912541b0
KS		 546 char *key;
547 char *val;
548 size_t len;
549
550 /* find key */
551 key = line;
552 while (isspace(key[0]))
553 key++;
554
555 /* comment or empty line */
556 if (key[0] == '#' || key[0] == '\0')
557 return -1;
558
559 /* split key/value */
560 val = strchr(key, '=');
561 if (val == NULL)
562 return -1;
563 val[0] = '\0';
564 val++;
565
566 /* find value */
567 while (isspace(val[0]))
568 val++;
569
570 /* terminate key */
571 len = strlen(key);
572 if (len == 0)
573 return -1;
574 while (isspace(key[len-1]))
575 len--;
576 key[len] = '\0';
577
578 /* terminate value */
579 len = strlen(val);
580 if (len == 0)
581 return -1;
582 while (isspace(val[len-1]))
583 len--;
584 val[len] = '\0';
585
586 if (len == 0)
587 return -1;
588
589 /* unquote */
590 if (val[0] == '"' || val[0] == '\'') {
591 if (val[len-1] != val[0]) {
baa30fbc 592 log_debug("inconsistent quoting: '%s', skip\n", line);
912541b0
KS		 593 return -1;
594 }
595 val[len-1] = '\0';
596 val++;
597 }
598
912541b0 599 /* handle device, renamed by external tool, returning new path */
33502ffe 600 if (streq(key, "DEVPATH")) {
912541b0
KS		 601 char syspath[UTIL_PATH_SIZE];
602
baa30fbc
KS		 603 log_debug("updating devpath from '%s' to '%s'\n",
604 udev_device_get_devpath(dev), val);
d5a89d7d 605 strscpyl(syspath, sizeof(syspath), "/sys", val, NULL);
912541b0
KS		 606 udev_device_set_syspath(dev, syspath);
607 } else {
608 struct udev_list_entry *entry;
609
610 entry = udev_device_add_property(dev, key, val);
611 /* store in db, skip private keys */
612 if (key[0] != '.')
613 udev_list_entry_set_num(entry, true);
614 }
615 return 0;
be4bedd1
KS		 616}
617
6880b25d 618static int import_file_into_properties(struct udev_device *dev, const char *filename)
be4bedd1 619{
912541b0
KS		 620 FILE *f;
621 char line[UTIL_LINE_SIZE];
622
47ef94ac 623 f = fopen(filename, "re");
912541b0
KS		 624 if (f == NULL)
625 return -1;
626 while (fgets(line, sizeof(line), f) != NULL)
627 import_property_from_string(dev, line);
628 fclose(f);
629 return 0;
bd0ed2ff
KS		 630}
631
2181d30a 632static int import_program_into_properties(struct udev_event *event, const char *program, const sigset_t *sigmask)
319c6700 633{
912541b0
KS		 634 struct udev_device *dev = event->dev;
635 char **envp;
636 char result[UTIL_LINE_SIZE];
637 char *line;
638 int err;
639
640 envp = udev_device_get_properties_envp(dev);
641 err = udev_event_spawn(event, program, envp, sigmask, result, sizeof(result));
642 if (err < 0)
643 return err;
644
645 line = result;
646 while (line != NULL) {
647 char *pos;
648
649 pos = strchr(line, '\n');
650 if (pos != NULL) {
651 pos[0] = '\0';
652 pos = &pos[1];
653 }
654 import_property_from_string(dev, line);
655 line = pos;
656 }
657 return 0;
319c6700
KS		 658}
659
6880b25d 660static int import_parent_into_properties(struct udev_device *dev, const char *filter)
0bfb84e1 661{
912541b0
KS		 662 struct udev_device *dev_parent;
663 struct udev_list_entry *list_entry;
664
665 dev_parent = udev_device_get_parent(dev);
666 if (dev_parent == NULL)
667 return -1;
668
912541b0
KS		 669 udev_list_entry_foreach(list_entry, udev_device_get_properties_list_entry(dev_parent)) {
670 const char *key = udev_list_entry_get_name(list_entry);
671 const char *val = udev_list_entry_get_value(list_entry);
672
673 if (fnmatch(filter, key, 0) == 0) {
674 struct udev_list_entry *entry;
675
912541b0
KS		 676 entry = udev_device_add_property(dev, key, val);
677 /* store in db, skip private keys */
678 if (key[0] != '.')
679 udev_list_entry_set_num(entry, true);
680 }
681 }
682 return 0;
e2ecb34f
KS		 683}
684
912541b0 685#define WAIT_LOOP_PER_SECOND 50
6880b25d 686static int wait_for_file(struct udev_device *dev, const char *file, int timeout)
b2fe4b9a 687{
912541b0
KS		 688 char filepath[UTIL_PATH_SIZE];
689 char devicepath[UTIL_PATH_SIZE];
690 struct stat stats;
691 int loop = timeout * WAIT_LOOP_PER_SECOND;
692
693 /* a relative path is a device attribute */
694 devicepath[0] = '\0';
695 if (file[0] != '/') {
d5a89d7d
KS		 696 strscpyl(devicepath, sizeof(devicepath), udev_device_get_syspath(dev), NULL);
697 strscpyl(filepath, sizeof(filepath), devicepath, "/", file, NULL);
912541b0
KS		 698 file = filepath;
699 }
700
912541b0
KS		 701 while (--loop) {
702 const struct timespec duration = { 0, 1000 * 1000 * 1000 / WAIT_LOOP_PER_SECOND };
703
704 /* lookup file */
705 if (stat(file, &stats) == 0) {
baa30fbc 706 log_debug("file '%s' appeared after %i loops\n", file, (timeout * WAIT_LOOP_PER_SECOND) - loop-1);
912541b0
KS		 707 return 0;
708 }
709 /* make sure, the device did not disappear in the meantime */
710 if (devicepath[0] != '\0' && stat(devicepath, &stats) != 0) {
baa30fbc 711 log_debug("device disappeared while waiting for '%s'\n", file);
912541b0
KS		 712 return -2;
713 }
baa30fbc 714 log_debug("wait for '%s' for %i mseconds\n", file, 1000 / WAIT_LOOP_PER_SECOND);
912541b0
KS		 715 nanosleep(&duration, NULL);
716 }
baa30fbc 717 log_debug("waiting for '%s' failed\n", file);
912541b0 718 return -1;
b2fe4b9a
KS		 719}
720
0ea5e96e
KS		 721static int attr_subst_subdir(char *attr, size_t len)
722{
912541b0
KS		 723 bool found = false;
724
725 if (strstr(attr, "/*/")) {
726 char *pos;
727 char dirname[UTIL_PATH_SIZE];
728 const char *tail;
729 DIR *dir;
730
d5a89d7d 731 strscpy(dirname, sizeof(dirname), attr);
912541b0
KS		 732 pos = strstr(dirname, "/*/");
733 if (pos == NULL)
734 return -1;
735 pos[0] = '\0';
736 tail = &pos[2];
737 dir = opendir(dirname);
738 if (dir != NULL) {
739 struct dirent *dent;
740
741 for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) {
742 struct stat stats;
743
744 if (dent->d_name[0] == '.')
745 continue;
d5a89d7d 746 strscpyl(attr, len, dirname, "/", dent->d_name, tail, NULL);
912541b0
KS		 747 if (stat(attr, &stats) == 0) {
748 found = true;
749 break;
750 }
751 }
752 closedir(dir);
753 }
754 }
755
756 return found;
0ea5e96e
KS		 757}
758
b0f7409f 759static int get_key(struct udev *udev, char **line, char **key, enum operation_type *op, char **value)
a0e5382d 760{
912541b0
KS		 761 char *linepos;
762 char *temp;
763
764 linepos = *line;
765 if (linepos == NULL || linepos[0] == '\0')
766 return -1;
767
768 /* skip whitespace */
769 while (isspace(linepos[0]) || linepos[0] == ',')
770 linepos++;
771
772 /* get the key */
773 if (linepos[0] == '\0')
774 return -1;
775 *key = linepos;
776
777 for (;;) {
778 linepos++;
779 if (linepos[0] == '\0')
780 return -1;
781 if (isspace(linepos[0]))
782 break;
783 if (linepos[0] == '=')
784 break;
785 if ((linepos[0] == '+') || (linepos[0] == '!') || (linepos[0] == ':'))
786 if (linepos[1] == '=')
787 break;
788 }
789
790 /* remember end of key */
791 temp = linepos;
792
793 /* skip whitespace after key */
794 while (isspace(linepos[0]))
795 linepos++;
796 if (linepos[0] == '\0')
797 return -1;
798
799 /* get operation type */
800 if (linepos[0] == '=' && linepos[1] == '=') {
801 *op = OP_MATCH;
802 linepos += 2;
803 } else if (linepos[0] == '!' && linepos[1] == '=') {
804 *op = OP_NOMATCH;
805 linepos += 2;
806 } else if (linepos[0] == '+' && linepos[1] == '=') {
807 *op = OP_ADD;
808 linepos += 2;
809 } else if (linepos[0] == '=') {
810 *op = OP_ASSIGN;
811 linepos++;
812 } else if (linepos[0] == ':' && linepos[1] == '=') {
813 *op = OP_ASSIGN_FINAL;
814 linepos += 2;
815 } else
816 return -1;
817
818 /* terminate key */
819 temp[0] = '\0';
820
821 /* skip whitespace after operator */
822 while (isspace(linepos[0]))
823 linepos++;
824 if (linepos[0] == '\0')
825 return -1;
826
827 /* get the value */
828 if (linepos[0] == '"')
829 linepos++;
830 else
831 return -1;
832 *value = linepos;
833
834 /* terminate */
835 temp = strchr(linepos, '"');
836 if (!temp)
837 return -1;
838 temp[0] = '\0';
839 temp++;
912541b0
KS		 840
841 /* move line to next key */
842 *line = temp;
843 return 0;
6880b25d 844}
95776dc6 845
6880b25d 846/* extract possible KEY{attr} */
04a9d3a0 847static const char *get_key_attribute(struct udev *udev, char *str)
6880b25d 848{
912541b0
KS		 849 char *pos;
850 char *attr;
851
852 attr = strchr(str, '{');
853 if (attr != NULL) {
854 attr++;
855 pos = strchr(attr, '}');
856 if (pos == NULL) {
baa30fbc 857 log_error("missing closing brace for format\n");
912541b0
KS		 858 return NULL;
859 }
860 pos[0] = '\0';
912541b0
KS		 861 return attr;
862 }
863 return NULL;
6880b25d 864}
95776dc6 865
0ef254d5 866static int rule_add_key(struct rule_tmp *rule_tmp, enum token_type type,
912541b0
KS		 867 enum operation_type op,
868 const char *value, const void *data)
6880b25d 869{
912541b0
KS		 870 struct token *token = &rule_tmp->token[rule_tmp->token_cur];
871 const char *attr = NULL;
872
873 memset(token, 0x00, sizeof(struct token));
874
875 switch (type) {
876 case TK_M_ACTION:
877 case TK_M_DEVPATH:
878 case TK_M_KERNEL:
879 case TK_M_SUBSYSTEM:
880 case TK_M_DRIVER:
881 case TK_M_WAITFOR:
882 case TK_M_DEVLINK:
883 case TK_M_NAME:
884 case TK_M_KERNELS:
885 case TK_M_SUBSYSTEMS:
886 case TK_M_DRIVERS:
887 case TK_M_TAGS:
888 case TK_M_PROGRAM:
889 case TK_M_IMPORT_FILE:
890 case TK_M_IMPORT_PROG:
891 case TK_M_IMPORT_DB:
892 case TK_M_IMPORT_CMDLINE:
893 case TK_M_IMPORT_PARENT:
894 case TK_M_RESULT:
895 case TK_A_OWNER:
896 case TK_A_GROUP:
897 case TK_A_MODE:
8a173387 898 case TK_A_DEVLINK:
912541b0
KS		 899 case TK_A_NAME:
900 case TK_A_GOTO:
901 case TK_M_TAG:
902 case TK_A_TAG:
915bf0f6 903 token->key.value_off = rules_add_string(rule_tmp->rules, value);
912541b0
KS		 904 break;
905 case TK_M_IMPORT_BUILTIN:
915bf0f6 906 token->key.value_off = rules_add_string(rule_tmp->rules, value);
912541b0
KS		 907 token->key.builtin_cmd = *(enum udev_builtin_cmd *)data;
908 break;
909 case TK_M_ENV:
910 case TK_M_ATTR:
911 case TK_M_ATTRS:
912 case TK_A_ATTR:
913 case TK_A_ENV:
914 attr = data;
915bf0f6
KS		 915 token->key.value_off = rules_add_string(rule_tmp->rules, value);
916 token->key.attr_off = rules_add_string(rule_tmp->rules, attr);
912541b0 917 break;
912541b0 918 case TK_M_TEST:
915bf0f6 919 token->key.value_off = rules_add_string(rule_tmp->rules, value);
912541b0
KS		 920 if (data != NULL)
921 token->key.mode = *(mode_t *)data;
922 break;
923 case TK_A_STRING_ESCAPE_NONE:
924 case TK_A_STRING_ESCAPE_REPLACE:
925 case TK_A_DB_PERSIST:
926 break;
83cd6b75 927 case TK_A_RUN_BUILTIN:
83cd6b75 928 case TK_A_RUN_PROGRAM:
4590cfe4 929 token->key.builtin_cmd = *(enum udev_builtin_cmd *)data;
915bf0f6 930 token->key.value_off = rules_add_string(rule_tmp->rules, value);
912541b0
KS		 931 break;
932 case TK_A_INOTIFY_WATCH:
933 case TK_A_DEVLINK_PRIO:
934 token->key.devlink_prio = *(int *)data;
935 break;
936 case TK_A_OWNER_ID:
937 token->key.uid = *(uid_t *)data;
938 break;
939 case TK_A_GROUP_ID:
940 token->key.gid = *(gid_t *)data;
941 break;
942 case TK_A_MODE_ID:
943 token->key.mode = *(mode_t *)data;
944 break;
945 case TK_A_STATIC_NODE:
915bf0f6 946 token->key.value_off = rules_add_string(rule_tmp->rules, value);
912541b0
KS		 947 break;
948 case TK_M_EVENT_TIMEOUT:
949 token->key.event_timeout = *(int *)data;
950 break;
951 case TK_RULE:
952 case TK_M_PARENTS_MIN:
953 case TK_M_PARENTS_MAX:
954 case TK_M_MAX:
955 case TK_END:
956 case TK_UNSET:
baa30fbc 957 log_error("wrong type %u\n", type);
912541b0
KS		 958 return -1;
959 }
960
961 if (value != NULL && type < TK_M_MAX) {
962 /* check if we need to split or call fnmatch() while matching rules */
963 enum string_glob_type glob;
964 int has_split;
965 int has_glob;
966
967 has_split = (strchr(value, '|') != NULL);
968 has_glob = (strchr(value, '*') != NULL || strchr(value, '?') != NULL || strchr(value, '[') != NULL);
969 if (has_split && has_glob) {
970 glob = GL_SPLIT_GLOB;
971 } else if (has_split) {
972 glob = GL_SPLIT;
973 } else if (has_glob) {
33502ffe 974 if (streq(value, "?*"))
912541b0
KS		 975 glob = GL_SOMETHING;
976 else
977 glob = GL_GLOB;
978 } else {
979 glob = GL_PLAIN;
980 }
981 token->key.glob = glob;
982 }
983
984 if (value != NULL && type > TK_M_MAX) {
985 /* check if assigned value has substitution chars */
986 if (value[0] == '[')
987 token->key.subst = SB_SUBSYS;
988 else if (strchr(value, '%') != NULL || strchr(value, '$') != NULL)
989 token->key.subst = SB_FORMAT;
990 else
991 token->key.subst = SB_NONE;
992 }
993
994 if (attr != NULL) {
995 /* check if property/attribut name has substitution chars */
996 if (attr[0] == '[')
997 token->key.attrsubst = SB_SUBSYS;
998 else if (strchr(attr, '%') != NULL || strchr(attr, '$') != NULL)
999 token->key.attrsubst = SB_FORMAT;
1000 else
1001 token->key.attrsubst = SB_NONE;
1002 }
1003
1004 token->key.type = type;
1005 token->key.op = op;
1006 rule_tmp->token_cur++;
8fef0ff2 1007 if (rule_tmp->token_cur >= ELEMENTSOF(rule_tmp->token)) {
baa30fbc 1008 log_error("temporary rule array too small\n");
912541b0
KS		 1009 return -1;
1010 }
1011 return 0;
6880b25d 1012}
e57e7bc1 1013
6880b25d
KS		 1014static int sort_token(struct udev_rules *rules, struct rule_tmp *rule_tmp)
1015{
912541b0
KS		 1016 unsigned int i;
1017 unsigned int start = 0;
1018 unsigned int end = rule_tmp->token_cur;
1019
1020 for (i = 0; i < rule_tmp->token_cur; i++) {
1021 enum token_type next_val = TK_UNSET;
1022 unsigned int next_idx = 0;
1023 unsigned int j;
1024
1025 /* find smallest value */
1026 for (j = start; j < end; j++) {
1027 if (rule_tmp->token[j].type == TK_UNSET)
1028 continue;
1029 if (next_val == TK_UNSET || rule_tmp->token[j].type < next_val) {
1030 next_val = rule_tmp->token[j].type;
1031 next_idx = j;
1032 }
1033 }
1034
1035 /* add token and mark done */
1036 if (add_token(rules, &rule_tmp->token[next_idx]) != 0)
1037 return -1;
1038 rule_tmp->token[next_idx].type = TK_UNSET;
1039
1040 /* shrink range */
1041 if (next_idx == start)
1042 start++;
1043 if (next_idx+1 == end)
1044 end--;
1045 }
1046 return 0;
724257d9
GKH		 1047}
1048
6880b25d 1049static int add_rule(struct udev_rules *rules, char *line,
912541b0 1050 const char *filename, unsigned int filename_off, unsigned int lineno)
724257d9 1051{
912541b0 1052 char *linepos;
04a9d3a0 1053 const char *attr;
912541b0
KS		 1054 struct rule_tmp rule_tmp;
1055
1056 memset(&rule_tmp, 0x00, sizeof(struct rule_tmp));
1057 rule_tmp.rules = rules;
1058 rule_tmp.rule.type = TK_RULE;
775f8b3c
KS		 1059 /* the offset in the rule is limited to unsigned short */
1060 if (filename_off < USHRT_MAX)
1061 rule_tmp.rule.rule.filename_off = filename_off;
912541b0
KS		 1062 rule_tmp.rule.rule.filename_line = lineno;
1063
1064 linepos = line;
1065 for (;;) {
1066 char *key;
1067 char *value;
1068 enum operation_type op;
1069
e736cf35
DR		 1070 if (get_key(rules->udev, &linepos, &key, &op, &value) != 0) {
1071 /* If we aren't at the end of the line, this is a parsing error.
1072 * Make a best effort to describe where the problem is. */
1291bc89
ZJS		 1073 if (*linepos != '\n') {
1074 char buf[2] = {linepos[1]};
1075 _cleanup_free_ char *tmp;
1076
1077 tmp = cescape(buf);
e736cf35 1078 log_error("invalid key/value pair in file %s on line %u,"
7c902b14 1079 "starting at character %tu ('%s')\n",
1291bc89
ZJS		 1080 filename, lineno, linepos - line + 1, tmp);
1081 if (linepos[1] == '#')
1082 log_info("hint: comments can only start at beginning of line");
1083 }
912541b0 1084 break;
e736cf35 1085 }
912541b0 1086
33502ffe 1087 if (streq(key, "ACTION")) {
912541b0 1088 if (op > OP_MATCH_MAX) {
baa30fbc 1089 log_error("invalid ACTION operation\n");
912541b0
KS		 1090 goto invalid;
1091 }
1092 rule_add_key(&rule_tmp, TK_M_ACTION, op, value, NULL);
1093 continue;
1094 }
1095
33502ffe 1096 if (streq(key, "DEVPATH")) {
912541b0 1097 if (op > OP_MATCH_MAX) {
baa30fbc 1098 log_error("invalid DEVPATH operation\n");
912541b0
KS		 1099 goto invalid;
1100 }
1101 rule_add_key(&rule_tmp, TK_M_DEVPATH, op, value, NULL);
1102 continue;
1103 }
1104
33502ffe 1105 if (streq(key, "KERNEL")) {
912541b0 1106 if (op > OP_MATCH_MAX) {
baa30fbc 1107 log_error("invalid KERNEL operation\n");
912541b0
KS		 1108 goto invalid;
1109 }
1110 rule_add_key(&rule_tmp, TK_M_KERNEL, op, value, NULL);
1111 continue;
1112 }
1113
33502ffe 1114 if (streq(key, "SUBSYSTEM")) {
912541b0 1115 if (op > OP_MATCH_MAX) {
baa30fbc 1116 log_error("invalid SUBSYSTEM operation\n");
912541b0
KS		 1117 goto invalid;
1118 }
1119 /* bus, class, subsystem events should all be the same */
33502ffe
KS		 1120 if (streq(value, "subsystem") ||
1121 streq(value, "bus") ||
1122 streq(value, "class")) {
1123 if (streq(value, "bus") || streq(value, "class"))
baa30fbc 1124 log_error("'%s' must be specified as 'subsystem' \n"
912541b0
KS		 1125 "please fix it in %s:%u", value, filename, lineno);
1126 rule_add_key(&rule_tmp, TK_M_SUBSYSTEM, op, "subsystem|class|bus", NULL);
1127 } else
1128 rule_add_key(&rule_tmp, TK_M_SUBSYSTEM, op, value, NULL);
1129 continue;
1130 }
1131
33502ffe 1132 if (streq(key, "DRIVER")) {
912541b0 1133 if (op > OP_MATCH_MAX) {
baa30fbc 1134 log_error("invalid DRIVER operation\n");
912541b0
KS		 1135 goto invalid;
1136 }
1137 rule_add_key(&rule_tmp, TK_M_DRIVER, op, value, NULL);
1138 continue;
1139 }
1140
33502ffe 1141 if (startswith(key, "ATTR{")) {
912541b0
KS		 1142 attr = get_key_attribute(rules->udev, key + sizeof("ATTR")-1);
1143 if (attr == NULL) {
baa30fbc 1144 log_error("error parsing ATTR attribute\n");
912541b0
KS		 1145 goto invalid;
1146 }
1147 if (op < OP_MATCH_MAX) {
1148 rule_add_key(&rule_tmp, TK_M_ATTR, op, value, attr);
1149 } else {
1150 rule_add_key(&rule_tmp, TK_A_ATTR, op, value, attr);
1151 }
1152 continue;
1153 }
1154
33502ffe 1155 if (streq(key, "KERNELS")) {
912541b0 1156 if (op > OP_MATCH_MAX) {
baa30fbc 1157 log_error("invalid KERNELS operation\n");
912541b0
KS		 1158 goto invalid;
1159 }
1160 rule_add_key(&rule_tmp, TK_M_KERNELS, op, value, NULL);
1161 continue;
1162 }
1163
33502ffe 1164 if (streq(key, "SUBSYSTEMS")) {
912541b0 1165 if (op > OP_MATCH_MAX) {
baa30fbc 1166 log_error("invalid SUBSYSTEMS operation\n");
912541b0
KS		 1167 goto invalid;
1168 }
1169 rule_add_key(&rule_tmp, TK_M_SUBSYSTEMS, op, value, NULL);
1170 continue;
1171 }
1172
33502ffe 1173 if (streq(key, "DRIVERS")) {
912541b0 1174 if (op > OP_MATCH_MAX) {
baa30fbc 1175 log_error("invalid DRIVERS operation\n");
912541b0
KS		 1176 goto invalid;
1177 }
1178 rule_add_key(&rule_tmp, TK_M_DRIVERS, op, value, NULL);
1179 continue;
1180 }
1181
33502ffe 1182 if (startswith(key, "ATTRS{")) {
912541b0 1183 if (op > OP_MATCH_MAX) {
baa30fbc 1184 log_error("invalid ATTRS operation\n");
912541b0
KS		 1185 goto invalid;
1186 }
1187 attr = get_key_attribute(rules->udev, key + sizeof("ATTRS")-1);
1188 if (attr == NULL) {
baa30fbc 1189 log_error("error parsing ATTRS attribute\n");
912541b0
KS		 1190 goto invalid;
1191 }
33502ffe 1192 if (startswith(attr, "device/"))
baa30fbc 1193 log_error("the 'device' link may not be available in a future kernel, "
912541b0
KS		 1194 "please fix it in %s:%u", filename, lineno);
1195 else if (strstr(attr, "../") != NULL)
baa30fbc 1196 log_error("do not reference parent sysfs directories directly, "
912541b0
KS		 1197 "it may break with a future kernel, please fix it in %s:%u", filename, lineno);
1198 rule_add_key(&rule_tmp, TK_M_ATTRS, op, value, attr);
1199 continue;
1200 }
1201
33502ffe 1202 if (streq(key, "TAGS")) {
912541b0 1203 if (op > OP_MATCH_MAX) {
baa30fbc 1204 log_error("invalid TAGS operation\n");
912541b0
KS		 1205 goto invalid;
1206 }
1207 rule_add_key(&rule_tmp, TK_M_TAGS, op, value, NULL);
1208 continue;
1209 }
1210
33502ffe 1211 if (startswith(key, "ENV{")) {
912541b0
KS		 1212 attr = get_key_attribute(rules->udev, key + sizeof("ENV")-1);
1213 if (attr == NULL) {
baa30fbc 1214 log_error("error parsing ENV attribute\n");
912541b0
KS		 1215 goto invalid;
1216 }
1217 if (op < OP_MATCH_MAX) {
1218 if (rule_add_key(&rule_tmp, TK_M_ENV, op, value, attr) != 0)
1219 goto invalid;
1220 } else {
1221 static const char *blacklist[] = {
1222 "ACTION",
1223 "SUBSYSTEM",
1224 "DEVTYPE",
1225 "MAJOR",
1226 "MINOR",
1227 "DRIVER",
1228 "IFINDEX",
1229 "DEVNAME",
1230 "DEVLINKS",
1231 "DEVPATH",
1232 "TAGS",
1233 };
1234 unsigned int i;
1235
395ea978
KS		 1236 for (i = 0; i < ELEMENTSOF(blacklist); i++) {
1237 if (!streq(attr, blacklist[i]))
912541b0 1238 continue;
395ea978
KS		 1239 log_error("invalid ENV attribute, '%s' can not be set %s:%u\n", attr, filename, lineno);
1240 goto invalid;
1241 }
912541b0
KS		 1242 if (rule_add_key(&rule_tmp, TK_A_ENV, op, value, attr) != 0)
1243 goto invalid;
1244 }
1245 continue;
1246 }
1247
33502ffe 1248 if (streq(key, "TAG")) {
912541b0
KS		 1249 if (op < OP_MATCH_MAX)
1250 rule_add_key(&rule_tmp, TK_M_TAG, op, value, NULL);
1251 else
1252 rule_add_key(&rule_tmp, TK_A_TAG, op, value, NULL);
1253 continue;
1254 }
1255
33502ffe 1256 if (streq(key, "PROGRAM")) {
912541b0
KS		 1257 rule_add_key(&rule_tmp, TK_M_PROGRAM, op, value, NULL);
1258 continue;
1259 }
1260
33502ffe 1261 if (streq(key, "RESULT")) {
912541b0 1262 if (op > OP_MATCH_MAX) {
baa30fbc 1263 log_error("invalid RESULT operation\n");
912541b0
KS		 1264 goto invalid;
1265 }
1266 rule_add_key(&rule_tmp, TK_M_RESULT, op, value, NULL);
1267 continue;
1268 }
1269
33502ffe 1270 if (startswith(key, "IMPORT")) {
912541b0
KS		 1271 attr = get_key_attribute(rules->udev, key + sizeof("IMPORT")-1);
1272 if (attr == NULL) {
baa30fbc 1273 log_error("IMPORT{} type missing, ignoring IMPORT %s:%u\n", filename, lineno);
912541b0
KS		 1274 continue;
1275 }
33502ffe 1276 if (streq(attr, "program")) {
912541b0
KS		 1277 /* find known built-in command */
1278 if (value[0] != '/') {
1279 enum udev_builtin_cmd cmd;
1280
1281 cmd = udev_builtin_lookup(value);
1282 if (cmd < UDEV_BUILTIN_MAX) {
baa30fbc
KS		 1283 log_debug("IMPORT found builtin '%s', replacing %s:%u\n",
1284 value, filename, lineno);
912541b0
KS		 1285 rule_add_key(&rule_tmp, TK_M_IMPORT_BUILTIN, op, value, &cmd);
1286 continue;
1287 }
1288 }
912541b0 1289 rule_add_key(&rule_tmp, TK_M_IMPORT_PROG, op, value, NULL);
33502ffe 1290 } else if (streq(attr, "builtin")) {
912541b0
KS		 1291 enum udev_builtin_cmd cmd = udev_builtin_lookup(value);
1292
912541b0
KS		 1293 if (cmd < UDEV_BUILTIN_MAX)
1294 rule_add_key(&rule_tmp, TK_M_IMPORT_BUILTIN, op, value, &cmd);
1295 else
baa30fbc 1296 log_error("IMPORT{builtin}: '%s' unknown %s:%u\n", value, filename, lineno);
33502ffe 1297 } else if (streq(attr, "file")) {
912541b0 1298 rule_add_key(&rule_tmp, TK_M_IMPORT_FILE, op, value, NULL);
33502ffe 1299 } else if (streq(attr, "db")) {
912541b0 1300 rule_add_key(&rule_tmp, TK_M_IMPORT_DB, op, value, NULL);
33502ffe 1301 } else if (streq(attr, "cmdline")) {
912541b0 1302 rule_add_key(&rule_tmp, TK_M_IMPORT_CMDLINE, op, value, NULL);
33502ffe 1303 } else if (streq(attr, "parent")) {
912541b0 1304 rule_add_key(&rule_tmp, TK_M_IMPORT_PARENT, op, value, NULL);
83cd6b75
KS		 1305 } else
1306 log_error("IMPORT{} unknown type, ignoring IMPORT %s:%u\n", filename, lineno);
912541b0
KS		 1307 continue;
1308 }
1309
33502ffe 1310 if (startswith(key, "TEST")) {
912541b0
KS		 1311 mode_t mode = 0;
1312
1313 if (op > OP_MATCH_MAX) {
baa30fbc 1314 log_error("invalid TEST operation\n");
912541b0
KS		 1315 goto invalid;
1316 }
1317 attr = get_key_attribute(rules->udev, key + sizeof("TEST")-1);
1318 if (attr != NULL) {
1319 mode = strtol(attr, NULL, 8);
1320 rule_add_key(&rule_tmp, TK_M_TEST, op, value, &mode);
1321 } else {
1322 rule_add_key(&rule_tmp, TK_M_TEST, op, value, NULL);
1323 }
1324 continue;
1325 }
1326
33502ffe 1327 if (startswith(key, "RUN")) {
83cd6b75
KS		 1328 attr = get_key_attribute(rules->udev, key + sizeof("RUN")-1);
1329 if (attr == NULL)
1330 attr = "program";
1331
33502ffe 1332 if (streq(attr, "builtin")) {
83cd6b75
KS		 1333 enum udev_builtin_cmd cmd = udev_builtin_lookup(value);
1334
1335 if (cmd < UDEV_BUILTIN_MAX)
1336 rule_add_key(&rule_tmp, TK_A_RUN_BUILTIN, op, value, &cmd);
1337 else
1338 log_error("IMPORT{builtin}: '%s' unknown %s:%u\n", value, filename, lineno);
33502ffe 1339 } else if (streq(attr, "program")) {
83cd6b75
KS		 1340 enum udev_builtin_cmd cmd = UDEV_BUILTIN_MAX;
1341
83cd6b75
KS		 1342 rule_add_key(&rule_tmp, TK_A_RUN_PROGRAM, op, value, &cmd);
1343 } else {
1344 log_error("RUN{} unknown type, ignoring RUN %s:%u\n", filename, lineno);
1345 }
1346
912541b0
KS		 1347 continue;
1348 }
1349
33502ffe 1350 if (streq(key, "WAIT_FOR") || streq(key, "WAIT_FOR_SYSFS")) {
912541b0
KS		 1351 rule_add_key(&rule_tmp, TK_M_WAITFOR, 0, value, NULL);
1352 continue;
1353 }
1354
33502ffe 1355 if (streq(key, "LABEL")) {
915bf0f6 1356 rule_tmp.rule.rule.label_off = rules_add_string(rules, value);
912541b0
KS		 1357 continue;
1358 }
1359
33502ffe 1360 if (streq(key, "GOTO")) {
912541b0
KS		 1361 rule_add_key(&rule_tmp, TK_A_GOTO, 0, value, NULL);
1362 continue;
1363 }
1364
33502ffe 1365 if (startswith(key, "NAME")) {
912541b0
KS		 1366 if (op < OP_MATCH_MAX) {
1367 rule_add_key(&rule_tmp, TK_M_NAME, op, value, NULL);
1368 } else {
33502ffe 1369 if (streq(value, "%k")) {
baa30fbc 1370 log_error("NAME=\"%%k\" is ignored, because it breaks kernel supplied names, "
912541b0
KS		 1371 "please remove it from %s:%u\n", filename, lineno);
1372 continue;
1373 }
1374 if (value[0] == '\0') {
baa30fbc
KS		 1375 log_debug("NAME=\"\" is ignored, because udev will not delete any device nodes, "
1376 "please remove it from %s:%u\n", filename, lineno);
912541b0
KS		 1377 continue;
1378 }
1379 rule_add_key(&rule_tmp, TK_A_NAME, op, value, NULL);
1380 }
1381 rule_tmp.rule.rule.can_set_name = true;
1382 continue;
1383 }
1384
8a173387
KS		 1385 if (streq(key, "SYMLINK")) {
1386 if (op < OP_MATCH_MAX)
912541b0 1387 rule_add_key(&rule_tmp, TK_M_DEVLINK, op, value, NULL);
8a173387
KS		 1388 else
1389 rule_add_key(&rule_tmp, TK_A_DEVLINK, op, value, NULL);
912541b0
KS		 1390 rule_tmp.rule.rule.can_set_name = true;
1391 continue;
1392 }
1393
33502ffe 1394 if (streq(key, "OWNER")) {
912541b0
KS		 1395 uid_t uid;
1396 char *endptr;
1397
1398 uid = strtoul(value, &endptr, 10);
1399 if (endptr[0] == '\0') {
1400 rule_add_key(&rule_tmp, TK_A_OWNER_ID, op, NULL, &uid);
1401 } else if ((rules->resolve_names > 0) && strchr("$%", value[0]) == NULL) {
1402 uid = add_uid(rules, value);
1403 rule_add_key(&rule_tmp, TK_A_OWNER_ID, op, NULL, &uid);
1404 } else if (rules->resolve_names >= 0) {
1405 rule_add_key(&rule_tmp, TK_A_OWNER, op, value, NULL);
1406 }
1407 rule_tmp.rule.rule.can_set_name = true;
1408 continue;
1409 }
1410
33502ffe 1411 if (streq(key, "GROUP")) {
912541b0
KS		 1412 gid_t gid;
1413 char *endptr;
1414
1415 gid = strtoul(value, &endptr, 10);
1416 if (endptr[0] == '\0') {
1417 rule_add_key(&rule_tmp, TK_A_GROUP_ID, op, NULL, &gid);
1418 } else if ((rules->resolve_names > 0) && strchr("$%", value[0]) == NULL) {
1419 gid = add_gid(rules, value);
1420 rule_add_key(&rule_tmp, TK_A_GROUP_ID, op, NULL, &gid);
1421 } else if (rules->resolve_names >= 0) {
1422 rule_add_key(&rule_tmp, TK_A_GROUP, op, value, NULL);
1423 }
1424 rule_tmp.rule.rule.can_set_name = true;
1425 continue;
1426 }
1427
33502ffe 1428 if (streq(key, "MODE")) {
912541b0
KS		 1429 mode_t mode;
1430 char *endptr;
1431
1432 mode = strtol(value, &endptr, 8);
1433 if (endptr[0] == '\0')
1434 rule_add_key(&rule_tmp, TK_A_MODE_ID, op, NULL, &mode);
1435 else
1436 rule_add_key(&rule_tmp, TK_A_MODE, op, value, NULL);
1437 rule_tmp.rule.rule.can_set_name = true;
1438 continue;
1439 }
1440
33502ffe 1441 if (streq(key, "OPTIONS")) {
912541b0
KS		 1442 const char *pos;
1443
1444 pos = strstr(value, "link_priority=");
1445 if (pos != NULL) {
1446 int prio = atoi(&pos[strlen("link_priority=")]);
1447
1448 rule_add_key(&rule_tmp, TK_A_DEVLINK_PRIO, op, NULL, &prio);
912541b0
KS		 1449 }
1450
1451 pos = strstr(value, "event_timeout=");
1452 if (pos != NULL) {
1453 int tout = atoi(&pos[strlen("event_timeout=")]);
1454
1455 rule_add_key(&rule_tmp, TK_M_EVENT_TIMEOUT, op, NULL, &tout);
912541b0
KS		 1456 }
1457
1458 pos = strstr(value, "string_escape=");
1459 if (pos != NULL) {
1460 pos = &pos[strlen("string_escape=")];
33502ffe 1461 if (startswith(pos, "none"))
912541b0 1462 rule_add_key(&rule_tmp, TK_A_STRING_ESCAPE_NONE, op, NULL, NULL);
33502ffe 1463 else if (startswith(pos, "replace"))
912541b0
KS		 1464 rule_add_key(&rule_tmp, TK_A_STRING_ESCAPE_REPLACE, op, NULL, NULL);
1465 }
1466
1467 pos = strstr(value, "db_persist");
1468 if (pos != NULL)
1469 rule_add_key(&rule_tmp, TK_A_DB_PERSIST, op, NULL, NULL);
1470
1471 pos = strstr(value, "nowatch");
1472 if (pos != NULL) {
1473 const int off = 0;
1474
1475 rule_add_key(&rule_tmp, TK_A_INOTIFY_WATCH, op, NULL, &off);
912541b0
KS		 1476 } else {
1477 pos = strstr(value, "watch");
1478 if (pos != NULL) {
1479 const int on = 1;
1480
1481 rule_add_key(&rule_tmp, TK_A_INOTIFY_WATCH, op, NULL, &on);
912541b0
KS		 1482 }
1483 }
1484
1485 pos = strstr(value, "static_node=");
1486 if (pos != NULL) {
1487 rule_add_key(&rule_tmp, TK_A_STATIC_NODE, op, &pos[strlen("static_node=")], NULL);
1488 rule_tmp.rule.rule.has_static_node = true;
1489 }
1490
1491 continue;
1492 }
1493
baa30fbc 1494 log_error("unknown key '%s' in %s:%u\n", key, filename, lineno);
912541b0
KS		 1495 goto invalid;
1496 }
1497
1498 /* add rule token */
1499 rule_tmp.rule.rule.token_count = 1 + rule_tmp.token_cur;
1500 if (add_token(rules, &rule_tmp.rule) != 0)
1501 goto invalid;
1502
1503 /* add tokens to list, sorted by type */
1504 if (sort_token(rules, &rule_tmp) != 0)
1505 goto invalid;
1506
1507 return 0;
c7521974 1508invalid:
baa30fbc 1509 log_error("invalid rule '%s:%u'\n", filename, lineno);
912541b0 1510 return -1;
c7521974
KS		 1511}
1512
775f8b3c 1513static int parse_file(struct udev_rules *rules, const char *filename)
c7521974 1514{
912541b0
KS		 1515 FILE *f;
1516 unsigned int first_token;
775f8b3c 1517 unsigned int filename_off;
912541b0
KS		 1518 char line[UTIL_LINE_SIZE];
1519 int line_nr = 0;
1520 unsigned int i;
1521
775f8b3c
KS		 1522 if (null_or_empty_path(filename)) {
1523 log_debug("skip empty file: %s\n", filename);
1524 return 0;
1525 }
1526 log_debug("read rules file: %s\n", filename);
912541b0 1527
47ef94ac 1528 f = fopen(filename, "re");
912541b0
KS		 1529 if (f == NULL)
1530 return -1;
1531
1532 first_token = rules->token_cur;
915bf0f6 1533 filename_off = rules_add_string(rules, filename);
912541b0
KS		 1534
1535 while (fgets(line, sizeof(line), f) != NULL) {
1536 char *key;
1537 size_t len;
1538
1539 /* skip whitespace */
1540 line_nr++;
1541 key = line;
1542 while (isspace(key[0]))
1543 key++;
1544
1545 /* comment */
1546 if (key[0] == '#')
1547 continue;
1548
1549 len = strlen(line);
1550 if (len < 3)
1551 continue;
1552
1553 /* continue reading if backslash+newline is found */
1554 while (line[len-2] == '\\') {
1555 if (fgets(&line[len-2], (sizeof(line)-len)+2, f) == NULL)
1556 break;
1557 if (strlen(&line[len-2]) < 2)
1558 break;
1559 line_nr++;
1560 len = strlen(line);
1561 }
1562
1563 if (len+1 >= sizeof(line)) {
baa30fbc 1564 log_error("line too long '%s':%u, ignored\n", filename, line_nr);
912541b0
KS		 1565 continue;
1566 }
1567 add_rule(rules, key, filename, filename_off, line_nr);
1568 }
1569 fclose(f);
1570
1571 /* link GOTOs to LABEL rules in this file to be able to fast-forward */
1572 for (i = first_token+1; i < rules->token_cur; i++) {
1573 if (rules->tokens[i].type == TK_A_GOTO) {
915bf0f6 1574 char *label = rules_str(rules, rules->tokens[i].key.value_off);
912541b0
KS		 1575 unsigned int j;
1576
1577 for (j = i+1; j < rules->token_cur; j++) {
1578 if (rules->tokens[j].type != TK_RULE)
1579 continue;
1580 if (rules->tokens[j].rule.label_off == 0)
1581 continue;
915bf0f6 1582 if (!streq(label, rules_str(rules, rules->tokens[j].rule.label_off)))
912541b0
KS		 1583 continue;
1584 rules->tokens[i].key.rule_goto = j;
1585 break;
1586 }
1587 if (rules->tokens[i].key.rule_goto == 0)
baa30fbc 1588 log_error("GOTO '%s' has no matching label in: '%s'\n", label, filename);
912541b0
KS		 1589 }
1590 }
1591 return 0;
c7521974
KS		 1592}
1593
d7ddce18 1594struct udev_rules *udev_rules_new(struct udev *udev, int resolve_names)
c7521974 1595{
912541b0
KS		 1596 struct udev_rules *rules;
1597 struct udev_list file_list;
912541b0 1598 struct token end_token;
775f8b3c
KS		 1599 char **files, **f;
1600 int r;
912541b0
KS		 1601
1602 rules = calloc(1, sizeof(struct udev_rules));
1603 if (rules == NULL)
1604 return NULL;
1605 rules->udev = udev;
1606 rules->resolve_names = resolve_names;
1607 udev_list_init(udev, &file_list, true);
1608
1609 /* init token array and string buffer */
1610 rules->tokens = malloc(PREALLOC_TOKEN * sizeof(struct token));
0820a4f0
VP		 1611 if (rules->tokens == NULL)
1612 return udev_rules_unref(rules);
912541b0
KS		 1613 rules->token_max = PREALLOC_TOKEN;
1614
915bf0f6
KS		 1615 rules->strbuf = strbuf_new();
1616 if (!rules->strbuf)
0820a4f0
VP		 1617 return udev_rules_unref(rules);
1618
ff944daa 1619 rules->dirs = strv_new("/etc/udev/rules.d",
4cb72937
KS		 1620 "/run/udev/rules.d",
1621 UDEVLIBEXECDIR "/rules.d",
775f8b3c
KS		 1622 NULL);
1623 if (!rules->dirs) {
1624 log_error("failed to build config directory array");
0820a4f0 1625 return udev_rules_unref(rules);
775f8b3c 1626 }
9eb977db 1627 if (!path_strv_canonicalize(rules->dirs)) {
775f8b3c 1628 log_error("failed to canonicalize config directories\n");
0820a4f0 1629 return udev_rules_unref(rules);
775f8b3c
KS		 1630 }
1631 strv_uniq(rules->dirs);
3b8c1cb0 1632
9c3fd04e 1633 rules->dirs_ts_usec = calloc(strv_length(rules->dirs), sizeof(usec_t));
0820a4f0
VP		 1634 if(!rules->dirs_ts_usec)
1635 return udev_rules_unref(rules);
3b8c1cb0
KS		 1636 udev_rules_check_timestamp(rules);
1637
7850b3b8 1638 r = conf_files_list_strv(&files, ".rules", NULL, (const char **)rules->dirs);
775f8b3c
KS		 1639 if (r < 0) {
1640 log_error("failed to enumerate rules files: %s\n", strerror(-r));
0820a4f0 1641 return udev_rules_unref(rules);
912541b0
KS		 1642 }
1643
775f8b3c
KS		 1644 /*
1645 * The offset value in the rules strct is limited; add all
1646 * rules file names to the beginning of the string buffer.
1647 */
1648 STRV_FOREACH(f, files)
915bf0f6 1649 rules_add_string(rules, *f);
912541b0 1650
775f8b3c
KS		 1651 STRV_FOREACH(f, files)
1652 parse_file(rules, *f);
1653
1654 strv_free(files);
912541b0
KS		 1655
1656 memset(&end_token, 0x00, sizeof(struct token));
1657 end_token.type = TK_END;
1658 add_token(rules, &end_token);
915bf0f6
KS		 1659 log_debug("rules contain %zu bytes tokens (%u * %zu bytes), %zu bytes strings\n",
1660 rules->token_max * sizeof(struct token), rules->token_max, sizeof(struct token), rules->strbuf->len);
912541b0 1661
915bf0f6
KS		 1662 /* cleanup temporary strbuf data */
1663 log_debug("%zu strings (%zu bytes), %zu de-duplicated (%zu bytes), %zu trie nodes used\n",
1664 rules->strbuf->in_count, rules->strbuf->in_len,
1665 rules->strbuf->dedup_count, rules->strbuf->dedup_len, rules->strbuf->nodes_count);
1666 strbuf_complete(rules->strbuf);
912541b0
KS		 1667
1668 /* cleanup uid/gid cache */
1669 free(rules->uids);
1670 rules->uids = NULL;
1671 rules->uids_cur = 0;
1672 rules->uids_max = 0;
1673 free(rules->gids);
1674 rules->gids = NULL;
1675 rules->gids_cur = 0;
1676 rules->gids_max = 0;
1677
1678 dump_rules(rules);
1679 return rules;
c7521974
KS		 1680}
1681
7c85d636 1682struct udev_rules *udev_rules_unref(struct udev_rules *rules)
c7521974 1683{
912541b0
KS		 1684 if (rules == NULL)
1685 return NULL;
1686 free(rules->tokens);
915bf0f6 1687 strbuf_cleanup(rules->strbuf);
912541b0
KS		 1688 free(rules->uids);
1689 free(rules->gids);
775f8b3c
KS		 1690 strv_free(rules->dirs);
1691 free(rules->dirs_ts_usec);
912541b0
KS		 1692 free(rules);
1693 return NULL;
c7521974 1694}
6880b25d 1695
6ada823a
KS		 1696bool udev_rules_check_timestamp(struct udev_rules *rules)
1697{
1698 unsigned int i;
1699 bool changed = false;
1700
da5d4bf6
KS		 1701 if (rules == NULL)
1702 goto out;
1703
775f8b3c 1704 for (i = 0; rules->dirs[i]; i++) {
6ada823a
KS		 1705 struct stat stats;
1706
775f8b3c 1707 if (stat(rules->dirs[i], &stats) < 0)
6ada823a
KS		 1708 continue;
1709
40fe8b11 1710 if (rules->dirs_ts_usec[i] == timespec_load(&stats.st_mtim))
6ada823a
KS		 1711 continue;
1712
1713 /* first check */
1714 if (rules->dirs_ts_usec[i] != 0) {
775f8b3c 1715 log_debug("reload - timestamp of '%s' changed\n", rules->dirs[i]);
6ada823a
KS		 1716 changed = true;
1717 }
1718
1719 /* update timestamp */
40fe8b11 1720 rules->dirs_ts_usec[i] = timespec_load(&stats.st_mtim);
6ada823a 1721 }
da5d4bf6 1722out:
6ada823a
KS		 1723 return changed;
1724}
1725
6880b25d
KS		 1726static int match_key(struct udev_rules *rules, struct token *token, const char *val)
1727{
915bf0f6 1728 char *key_value = rules_str(rules, token->key.value_off);
912541b0
KS		 1729 char *pos;
1730 bool match = false;
1731
1732 if (val == NULL)
1733 val = "";
1734
1735 switch (token->key.glob) {
1736 case GL_PLAIN:
33502ffe 1737 match = (streq(key_value, val));
912541b0
KS		 1738 break;
1739 case GL_GLOB:
1740 match = (fnmatch(key_value, val, 0) == 0);
1741 break;
1742 case GL_SPLIT:
1743 {
33502ffe 1744 const char *s;
912541b0
KS		 1745 size_t len;
1746
915bf0f6 1747 s = rules_str(rules, token->key.value_off);
912541b0
KS		 1748 len = strlen(val);
1749 for (;;) {
1750 const char *next;
1751
33502ffe 1752 next = strchr(s, '|');
912541b0 1753 if (next != NULL) {
33502ffe 1754 size_t matchlen = (size_t)(next - s);
912541b0 1755
641906e9 1756 match = (matchlen == len && strneq(s, val, matchlen));
912541b0
KS		 1757 if (match)
1758 break;
1759 } else {
33502ffe 1760 match = (streq(s, val));
912541b0
KS		 1761 break;
1762 }
33502ffe 1763 s = &next[1];
912541b0
KS		 1764 }
1765 break;
1766 }
1767 case GL_SPLIT_GLOB:
1768 {
1769 char value[UTIL_PATH_SIZE];
1770
d5a89d7d 1771 strscpy(value, sizeof(value), rules_str(rules, token->key.value_off));
912541b0
KS		 1772 key_value = value;
1773 while (key_value != NULL) {
1774 pos = strchr(key_value, '|');
1775 if (pos != NULL) {
1776 pos[0] = '\0';
1777 pos = &pos[1];
1778 }
912541b0
KS		 1779 match = (fnmatch(key_value, val, 0) == 0);
1780 if (match)
1781 break;
1782 key_value = pos;
1783 }
1784 break;
1785 }
1786 case GL_SOMETHING:
1787 match = (val[0] != '\0');
1788 break;
1789 case GL_UNSET:
1790 return -1;
1791 }
1792
baa30fbc 1793 if (match && (token->key.op == OP_MATCH))
912541b0 1794 return 0;
baa30fbc 1795 if (!match && (token->key.op == OP_NOMATCH))
912541b0 1796 return 0;
912541b0 1797 return -1;
6880b25d
KS		 1798}
1799
1800static int match_attr(struct udev_rules *rules, struct udev_device *dev, struct udev_event *event, struct token *cur)
1801{
912541b0
KS		 1802 const char *name;
1803 char nbuf[UTIL_NAME_SIZE];
1804 const char *value;
1805 char vbuf[UTIL_NAME_SIZE];
1806 size_t len;
1807
915bf0f6 1808 name = rules_str(rules, cur->key.attr_off);
912541b0
KS		 1809 switch (cur->key.attrsubst) {
1810 case SB_FORMAT:
1811 udev_event_apply_format(event, name, nbuf, sizeof(nbuf));
1812 name = nbuf;
1813 /* fall through */
1814 case SB_NONE:
1815 value = udev_device_get_sysattr_value(dev, name);
1816 if (value == NULL)
1817 return -1;
1818 break;
1819 case SB_SUBSYS:
1820 if (util_resolve_subsys_kernel(event->udev, name, vbuf, sizeof(vbuf), 1) != 0)
1821 return -1;
1822 value = vbuf;
1823 break;
1824 default:
1825 return -1;
1826 }
1827
1828 /* remove trailing whitespace, if not asked to match for it */
1829 len = strlen(value);
1830 if (len > 0 && isspace(value[len-1])) {
1831 const char *key_value;
1832 size_t klen;
1833
915bf0f6 1834 key_value = rules_str(rules, cur->key.value_off);
912541b0
KS		 1835 klen = strlen(key_value);
1836 if (klen > 0 && !isspace(key_value[klen-1])) {
1837 if (value != vbuf) {
d5a89d7d 1838 strscpy(vbuf, sizeof(vbuf), value);
912541b0
KS		 1839 value = vbuf;
1840 }
1841 while (len > 0 && isspace(vbuf[--len]))
1842 vbuf[len] = '\0';
912541b0
KS		 1843 }
1844 }
1845
1846 return match_key(rules, cur, value);
6880b25d
KS		 1847}
1848
1849enum escape_type {
912541b0
KS		 1850 ESCAPE_UNSET,
1851 ESCAPE_NONE,
1852 ESCAPE_REPLACE,
6880b25d
KS		 1853};
1854
2181d30a 1855int udev_rules_apply_to_event(struct udev_rules *rules, struct udev_event *event, const sigset_t *sigmask)
6880b25d 1856{
912541b0
KS		 1857 struct token *cur;
1858 struct token *rule;
1859 enum escape_type esc = ESCAPE_UNSET;
1860 bool can_set_name;
1861
1862 if (rules->tokens == NULL)
1863 return -1;
1864
33502ffe 1865 can_set_name = ((!streq(udev_device_get_action(event->dev), "remove")) &&
912541b0
KS		 1866 (major(udev_device_get_devnum(event->dev)) > 0 ||
1867 udev_device_get_ifindex(event->dev) > 0));
1868
1869 /* loop through token list, match, run actions or forward to next rule */
1870 cur = &rules->tokens[0];
1871 rule = cur;
1872 for (;;) {
1873 dump_token(rules, cur);
1874 switch (cur->type) {
1875 case TK_RULE:
1876 /* current rule */
1877 rule = cur;
1878 /* possibly skip rules which want to set NAME, SYMLINK, OWNER, GROUP, MODE */
1879 if (!can_set_name && rule->rule.can_set_name)
1880 goto nomatch;
1881 esc = ESCAPE_UNSET;
1882 break;
1883 case TK_M_ACTION:
1884 if (match_key(rules, cur, udev_device_get_action(event->dev)) != 0)
1885 goto nomatch;
1886 break;
1887 case TK_M_DEVPATH:
1888 if (match_key(rules, cur, udev_device_get_devpath(event->dev)) != 0)
1889 goto nomatch;
1890 break;
1891 case TK_M_KERNEL:
1892 if (match_key(rules, cur, udev_device_get_sysname(event->dev)) != 0)
1893 goto nomatch;
1894 break;
1895 case TK_M_DEVLINK: {
912541b0
KS		 1896 struct udev_list_entry *list_entry;
1897 bool match = false;
1898
1899 udev_list_entry_foreach(list_entry, udev_device_get_devlinks_list_entry(event->dev)) {
1900 const char *devlink;
1901
4cb72937 1902 devlink = udev_list_entry_get_name(list_entry) + strlen("/dev/");
912541b0
KS		 1903 if (match_key(rules, cur, devlink) == 0) {
1904 match = true;
1905 break;
1906 }
1907 }
1908 if (!match)
1909 goto nomatch;
1910 break;
1911 }
1912 case TK_M_NAME:
1913 if (match_key(rules, cur, event->name) != 0)
1914 goto nomatch;
1915 break;
1916 case TK_M_ENV: {
915bf0f6 1917 const char *key_name = rules_str(rules, cur->key.attr_off);
912541b0
KS		 1918 const char *value;
1919
1920 value = udev_device_get_property_value(event->dev, key_name);
baa30fbc 1921 if (value == NULL)
912541b0 1922 value = "";
912541b0
KS		 1923 if (match_key(rules, cur, value))
1924 goto nomatch;
1925 break;
1926 }
1927 case TK_M_TAG: {
1928 struct udev_list_entry *list_entry;
1929 bool match = false;
1930
1931 udev_list_entry_foreach(list_entry, udev_device_get_tags_list_entry(event->dev)) {
915bf0f6 1932 if (streq(rules_str(rules, cur->key.value_off), udev_list_entry_get_name(list_entry))) {
912541b0
KS		 1933 match = true;
1934 break;
1935 }
1936 }
1937 if (!match && (cur->key.op != OP_NOMATCH))
1938 goto nomatch;
1939 break;
1940 }
1941 case TK_M_SUBSYSTEM:
1942 if (match_key(rules, cur, udev_device_get_subsystem(event->dev)) != 0)
1943 goto nomatch;
1944 break;
1945 case TK_M_DRIVER:
1946 if (match_key(rules, cur, udev_device_get_driver(event->dev)) != 0)
1947 goto nomatch;
1948 break;
1949 case TK_M_WAITFOR: {
1950 char filename[UTIL_PATH_SIZE];
1951 int found;
1952
915bf0f6 1953 udev_event_apply_format(event, rules_str(rules, cur->key.value_off), filename, sizeof(filename));
912541b0
KS		 1954 found = (wait_for_file(event->dev, filename, 10) == 0);
1955 if (!found && (cur->key.op != OP_NOMATCH))
1956 goto nomatch;
1957 break;
1958 }
1959 case TK_M_ATTR:
1960 if (match_attr(rules, event->dev, event, cur) != 0)
1961 goto nomatch;
1962 break;
1963 case TK_M_KERNELS:
1964 case TK_M_SUBSYSTEMS:
1965 case TK_M_DRIVERS:
1966 case TK_M_ATTRS:
1967 case TK_M_TAGS: {
1968 struct token *next;
1969
1970 /* get whole sequence of parent matches */
1971 next = cur;
1972 while (next->type > TK_M_PARENTS_MIN && next->type < TK_M_PARENTS_MAX)
1973 next++;
1974
1975 /* loop over parents */
1976 event->dev_parent = event->dev;
1977 for (;;) {
1978 struct token *key;
1979
912541b0
KS		 1980 /* loop over sequence of parent match keys */
1981 for (key = cur; key < next; key++ ) {
1982 dump_token(rules, key);
1983 switch(key->type) {
1984 case TK_M_KERNELS:
1985 if (match_key(rules, key, udev_device_get_sysname(event->dev_parent)) != 0)
1986 goto try_parent;
1987 break;
1988 case TK_M_SUBSYSTEMS:
1989 if (match_key(rules, key, udev_device_get_subsystem(event->dev_parent)) != 0)
1990 goto try_parent;
1991 break;
1992 case TK_M_DRIVERS:
1993 if (match_key(rules, key, udev_device_get_driver(event->dev_parent)) != 0)
1994 goto try_parent;
1995 break;
1996 case TK_M_ATTRS:
1997 if (match_attr(rules, event->dev_parent, event, key) != 0)
1998 goto try_parent;
1999 break;
2000 case TK_M_TAGS: {
915bf0f6 2001 bool match = udev_device_has_tag(event->dev_parent, rules_str(rules, cur->key.value_off));
912541b0
KS		 2002
2003 if (match && key->key.op == OP_NOMATCH)
2004 goto try_parent;
2005 if (!match && key->key.op == OP_MATCH)
2006 goto try_parent;
2007 break;
2008 }
2009 default:
2010 goto nomatch;
2011 }
912541b0 2012 }
912541b0
KS		 2013 break;
2014
2015 try_parent:
2016 event->dev_parent = udev_device_get_parent(event->dev_parent);
2017 if (event->dev_parent == NULL)
2018 goto nomatch;
2019 }
2020 /* move behind our sequence of parent match keys */
2021 cur = next;
2022 continue;
2023 }
2024 case TK_M_TEST: {
2025 char filename[UTIL_PATH_SIZE];
2026 struct stat statbuf;
2027 int match;
2028
915bf0f6 2029 udev_event_apply_format(event, rules_str(rules, cur->key.value_off), filename, sizeof(filename));
912541b0
KS		 2030 if (util_resolve_subsys_kernel(event->udev, filename, filename, sizeof(filename), 0) != 0) {
2031 if (filename[0] != '/') {
2032 char tmp[UTIL_PATH_SIZE];
2033
d5a89d7d
KS		 2034 strscpy(tmp, sizeof(tmp), filename);
2035 strscpyl(filename, sizeof(filename),
912541b0
KS		 2036 udev_device_get_syspath(event->dev), "/", tmp, NULL);
2037 }
2038 }
2039 attr_subst_subdir(filename, sizeof(filename));
2040
2041 match = (stat(filename, &statbuf) == 0);
baa30fbc 2042 if (match && cur->key.mode > 0)
912541b0 2043 match = ((statbuf.st_mode & cur->key.mode) > 0);
912541b0
KS		 2044 if (match && cur->key.op == OP_NOMATCH)
2045 goto nomatch;
2046 if (!match && cur->key.op == OP_MATCH)
2047 goto nomatch;
2048 break;
2049 }
2050 case TK_M_EVENT_TIMEOUT:
baa30fbc 2051 log_debug("OPTIONS event_timeout=%u\n", cur->key.event_timeout);
912541b0
KS		 2052 event->timeout_usec = cur->key.event_timeout * 1000 * 1000;
2053 break;
2054 case TK_M_PROGRAM: {
2055 char program[UTIL_PATH_SIZE];
2056 char **envp;
2057 char result[UTIL_PATH_SIZE];
2058
2059 free(event->program_result);
2060 event->program_result = NULL;
915bf0f6 2061 udev_event_apply_format(event, rules_str(rules, cur->key.value_off), program, sizeof(program));
912541b0 2062 envp = udev_device_get_properties_envp(event->dev);
baa30fbc
KS		 2063 log_debug("PROGRAM '%s' %s:%u\n",
2064 program,
915bf0f6 2065 rules_str(rules, rule->rule.filename_off),
baa30fbc 2066 rule->rule.filename_line);
912541b0
KS		 2067
2068 if (udev_event_spawn(event, program, envp, sigmask, result, sizeof(result)) < 0) {
2069 if (cur->key.op != OP_NOMATCH)
2070 goto nomatch;
2071 } else {
2072 int count;
2073
2074 util_remove_trailing_chars(result, '\n');
2075 if (esc == ESCAPE_UNSET || esc == ESCAPE_REPLACE) {
2076 count = util_replace_chars(result, UDEV_ALLOWED_CHARS_INPUT);
2077 if (count > 0)
baa30fbc 2078 log_debug("%i character(s) replaced\n" , count);
912541b0
KS		 2079 }
2080 event->program_result = strdup(result);
912541b0
KS		 2081 if (cur->key.op == OP_NOMATCH)
2082 goto nomatch;
2083 }
2084 break;
2085 }
2086 case TK_M_IMPORT_FILE: {
2087 char import[UTIL_PATH_SIZE];
2088
915bf0f6 2089 udev_event_apply_format(event, rules_str(rules, cur->key.value_off), import, sizeof(import));
912541b0
KS		 2090 if (import_file_into_properties(event->dev, import) != 0)
2091 if (cur->key.op != OP_NOMATCH)
2092 goto nomatch;
2093 break;
2094 }
2095 case TK_M_IMPORT_PROG: {
2096 char import[UTIL_PATH_SIZE];
2097
915bf0f6 2098 udev_event_apply_format(event, rules_str(rules, cur->key.value_off), import, sizeof(import));
baa30fbc
KS		 2099 log_debug("IMPORT '%s' %s:%u\n",
2100 import,
915bf0f6 2101 rules_str(rules, rule->rule.filename_off),
baa30fbc 2102 rule->rule.filename_line);
912541b0
KS		 2103
2104 if (import_program_into_properties(event, import, sigmask) != 0)
2105 if (cur->key.op != OP_NOMATCH)
2106 goto nomatch;
2107 break;
2108 }
2109 case TK_M_IMPORT_BUILTIN: {
2110 char command[UTIL_PATH_SIZE];
2111
2112 if (udev_builtin_run_once(cur->key.builtin_cmd)) {
2113 /* check if we ran already */
2114 if (event->builtin_run & (1 << cur->key.builtin_cmd)) {
baa30fbc
KS		 2115 log_debug("IMPORT builtin skip '%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 /* return the result from earlier run */
2120 if (event->builtin_ret & (1 << cur->key.builtin_cmd))
2121 if (cur->key.op != OP_NOMATCH)
2122 goto nomatch;
2123 break;
2124 }
2125 /* mark as ran */
2126 event->builtin_run |= (1 << cur->key.builtin_cmd);
2127 }
2128
915bf0f6 2129 udev_event_apply_format(event, rules_str(rules, cur->key.value_off), command, sizeof(command));
baa30fbc
KS		 2130 log_debug("IMPORT builtin '%s' %s:%u\n",
2131 udev_builtin_name(cur->key.builtin_cmd),
915bf0f6 2132 rules_str(rules, rule->rule.filename_off),
baa30fbc 2133 rule->rule.filename_line);
912541b0
KS		 2134
2135 if (udev_builtin_run(event->dev, cur->key.builtin_cmd, command, false) != 0) {
2136 /* remember failure */
baa30fbc
KS		 2137 log_debug("IMPORT builtin '%s' returned non-zero\n",
2138 udev_builtin_name(cur->key.builtin_cmd));
912541b0
KS		 2139 event->builtin_ret |= (1 << cur->key.builtin_cmd);
2140 if (cur->key.op != OP_NOMATCH)
2141 goto nomatch;
2142 }
2143 break;
2144 }
2145 case TK_M_IMPORT_DB: {
915bf0f6 2146 const char *key = rules_str(rules, cur->key.value_off);
912541b0
KS		 2147 const char *value;
2148
2149 value = udev_device_get_property_value(event->dev_db, key);
2150 if (value != NULL) {
2151 struct udev_list_entry *entry;
2152
2153 entry = udev_device_add_property(event->dev, key, value);
2154 udev_list_entry_set_num(entry, true);
2155 } else {
2156 if (cur->key.op != OP_NOMATCH)
2157 goto nomatch;
2158 }
2159 break;
2160 }
2161 case TK_M_IMPORT_CMDLINE: {
2162 FILE *f;
2163 bool imported = false;
2164
47ef94ac 2165 f = fopen("/proc/cmdline", "re");
912541b0
KS		 2166 if (f != NULL) {
2167 char cmdline[4096];
2168
2169 if (fgets(cmdline, sizeof(cmdline), f) != NULL) {
915bf0f6 2170 const char *key = rules_str(rules, cur->key.value_off);
912541b0
KS		 2171 char *pos;
2172
2173 pos = strstr(cmdline, key);
2174 if (pos != NULL) {
2175 struct udev_list_entry *entry;
2176
2177 pos += strlen(key);
2178 if (pos[0] == '\0' || isspace(pos[0])) {
2179 /* we import simple flags as 'FLAG=1' */
2180 entry = udev_device_add_property(event->dev, key, "1");
2181 udev_list_entry_set_num(entry, true);
2182 imported = true;
2183 } else if (pos[0] == '=') {
2184 const char *value;
2185
2186 pos++;
2187 value = pos;
2188 while (pos[0] != '\0' && !isspace(pos[0]))
2189 pos++;
2190 pos[0] = '\0';
2191 entry = udev_device_add_property(event->dev, key, value);
2192 udev_list_entry_set_num(entry, true);
2193 imported = true;
2194 }
2195 }
2196 }
2197 fclose(f);
2198 }
2199 if (!imported && cur->key.op != OP_NOMATCH)
2200 goto nomatch;
2201 break;
2202 }
2203 case TK_M_IMPORT_PARENT: {
2204 char import[UTIL_PATH_SIZE];
2205
915bf0f6 2206 udev_event_apply_format(event, rules_str(rules, cur->key.value_off), import, sizeof(import));
912541b0
KS		 2207 if (import_parent_into_properties(event->dev, import) != 0)
2208 if (cur->key.op != OP_NOMATCH)
2209 goto nomatch;
2210 break;
2211 }
2212 case TK_M_RESULT:
2213 if (match_key(rules, cur, event->program_result) != 0)
2214 goto nomatch;
2215 break;
2216 case TK_A_STRING_ESCAPE_NONE:
2217 esc = ESCAPE_NONE;
2218 break;
2219 case TK_A_STRING_ESCAPE_REPLACE:
2220 esc = ESCAPE_REPLACE;
2221 break;
2222 case TK_A_DB_PERSIST:
2223 udev_device_set_db_persist(event->dev);
2224 break;
2225 case TK_A_INOTIFY_WATCH:
2226 if (event->inotify_watch_final)
2227 break;
2228 if (cur->key.op == OP_ASSIGN_FINAL)
2229 event->inotify_watch_final = true;
2230 event->inotify_watch = cur->key.watch;
2231 break;
2232 case TK_A_DEVLINK_PRIO:
2233 udev_device_set_devlink_priority(event->dev, cur->key.devlink_prio);
2234 break;
2235 case TK_A_OWNER: {
2236 char owner[UTIL_NAME_SIZE];
2237
2238 if (event->owner_final)
2239 break;
2240 if (cur->key.op == OP_ASSIGN_FINAL)
2241 event->owner_final = true;
915bf0f6 2242 udev_event_apply_format(event, rules_str(rules, cur->key.value_off), owner, sizeof(owner));
1edefa4f 2243 event->owner_set = true;
912541b0 2244 event->uid = util_lookup_user(event->udev, owner);
baa30fbc
KS		 2245 log_debug("OWNER %u %s:%u\n",
2246 event->uid,
915bf0f6 2247 rules_str(rules, rule->rule.filename_off),
baa30fbc 2248 rule->rule.filename_line);
912541b0
KS		 2249 break;
2250 }
2251 case TK_A_GROUP: {
2252 char group[UTIL_NAME_SIZE];
2253
2254 if (event->group_final)
2255 break;
2256 if (cur->key.op == OP_ASSIGN_FINAL)
2257 event->group_final = true;
915bf0f6 2258 udev_event_apply_format(event, rules_str(rules, cur->key.value_off), group, sizeof(group));
1edefa4f 2259 event->group_set = true;
912541b0 2260 event->gid = util_lookup_group(event->udev, group);
baa30fbc
KS		 2261 log_debug("GROUP %u %s:%u\n",
2262 event->gid,
915bf0f6 2263 rules_str(rules, rule->rule.filename_off),
baa30fbc 2264 rule->rule.filename_line);
912541b0
KS		 2265 break;
2266 }
2267 case TK_A_MODE: {
2268 char mode_str[UTIL_NAME_SIZE];
2269 mode_t mode;
2270 char *endptr;
2271
2272 if (event->mode_final)
2273 break;
915bf0f6 2274 udev_event_apply_format(event, rules_str(rules, cur->key.value_off), mode_str, sizeof(mode_str));
912541b0
KS		 2275 mode = strtol(mode_str, &endptr, 8);
2276 if (endptr[0] != '\0') {
baa30fbc 2277 log_error("ignoring invalid mode '%s'\n", mode_str);
912541b0
KS		 2278 break;
2279 }
2280 if (cur->key.op == OP_ASSIGN_FINAL)
2281 event->mode_final = true;
2282 event->mode_set = true;
2283 event->mode = mode;
baa30fbc
KS		 2284 log_debug("MODE %#o %s:%u\n",
2285 event->mode,
915bf0f6 2286 rules_str(rules, rule->rule.filename_off),
baa30fbc 2287 rule->rule.filename_line);
912541b0
KS		 2288 break;
2289 }
2290 case TK_A_OWNER_ID:
2291 if (event->owner_final)
2292 break;
2293 if (cur->key.op == OP_ASSIGN_FINAL)
2294 event->owner_final = true;
1edefa4f 2295 event->owner_set = true;
912541b0 2296 event->uid = cur->key.uid;
baa30fbc
KS		 2297 log_debug("OWNER %u %s:%u\n",
2298 event->uid,
915bf0f6 2299 rules_str(rules, rule->rule.filename_off),
baa30fbc 2300 rule->rule.filename_line);
912541b0
KS		 2301 break;
2302 case TK_A_GROUP_ID:
2303 if (event->group_final)
2304 break;
2305 if (cur->key.op == OP_ASSIGN_FINAL)
2306 event->group_final = true;
1edefa4f 2307 event->group_set = true;
912541b0 2308 event->gid = cur->key.gid;
baa30fbc
KS		 2309 log_debug("GROUP %u %s:%u\n",
2310 event->gid,
915bf0f6 2311 rules_str(rules, rule->rule.filename_off),
baa30fbc 2312 rule->rule.filename_line);
912541b0
KS		 2313 break;
2314 case TK_A_MODE_ID:
2315 if (event->mode_final)
2316 break;
2317 if (cur->key.op == OP_ASSIGN_FINAL)
2318 event->mode_final = true;
2319 event->mode_set = true;
2320 event->mode = cur->key.mode;
baa30fbc
KS		 2321 log_debug("MODE %#o %s:%u\n",
2322 event->mode,
915bf0f6 2323 rules_str(rules, rule->rule.filename_off),
baa30fbc 2324 rule->rule.filename_line);
912541b0
KS		 2325 break;
2326 case TK_A_ENV: {
915bf0f6
KS		 2327 const char *name = rules_str(rules, cur->key.attr_off);
2328 char *value = rules_str(rules, cur->key.value_off);
07845c14
KS		 2329 char value_new[UTIL_NAME_SIZE];
2330 const char *value_old = NULL;
2331 struct udev_list_entry *entry;
912541b0 2332
07845c14
KS		 2333 if (value[0] == '\0') {
2334 if (cur->key.op == OP_ADD)
2335 break;
912541b0 2336 udev_device_add_property(event->dev, name, NULL);
07845c14 2337 break;
912541b0 2338 }
07845c14
KS		 2339
2340 if (cur->key.op == OP_ADD)
2341 value_old = udev_device_get_property_value(event->dev, name);
2342 if (value_old) {
2343 char temp[UTIL_NAME_SIZE];
2344
2345 /* append value separated by space */
2346 udev_event_apply_format(event, value, temp, sizeof(temp));
d5a89d7d 2347 strscpyl(value_new, sizeof(value_new), value_old, " ", temp, NULL);
07845c14
KS		 2348 } else
2349 udev_event_apply_format(event, value, value_new, sizeof(value_new));
2350
2351 entry = udev_device_add_property(event->dev, name, value_new);
2352 /* store in db, skip private keys */
2353 if (name[0] != '.')
2354 udev_list_entry_set_num(entry, true);
912541b0
KS		 2355 break;
2356 }
2357 case TK_A_TAG: {
2358 char tag[UTIL_PATH_SIZE];
2359 const char *p;
2360
915bf0f6 2361 udev_event_apply_format(event, rules_str(rules, cur->key.value_off), tag, sizeof(tag));
912541b0
KS		 2362 if (cur->key.op == OP_ASSIGN || cur->key.op == OP_ASSIGN_FINAL)
2363 udev_device_cleanup_tags_list(event->dev);
2364 for (p = tag; *p != '\0'; p++) {
2365 if ((*p >= 'a' && *p <= 'z') ||
2366 (*p >= 'A' && *p <= 'Z') ||
2367 (*p >= '0' && *p <= '9') ||
2368 *p == '-' || *p == '_')
2369 continue;
baa30fbc 2370 log_error("ignoring invalid tag name '%s'\n", tag);
912541b0
KS		 2371 break;
2372 }
2373 udev_device_add_tag(event->dev, tag);
2374 break;
2375 }
2376 case TK_A_NAME: {
915bf0f6 2377 const char *name = rules_str(rules, cur->key.value_off);
0ecfcbd4 2378
912541b0
KS		 2379 char name_str[UTIL_PATH_SIZE];
2380 int count;
2381
2382 if (event->name_final)
2383 break;
2384 if (cur->key.op == OP_ASSIGN_FINAL)
2385 event->name_final = true;
2386 udev_event_apply_format(event, name, name_str, sizeof(name_str));
2387 if (esc == ESCAPE_UNSET || esc == ESCAPE_REPLACE) {
2388 count = util_replace_chars(name_str, "/");
2389 if (count > 0)
baa30fbc 2390 log_debug("%i character(s) replaced\n", count);
912541b0 2391 }
6ada823a 2392 if (major(udev_device_get_devnum(event->dev)) &&
4cb72937 2393 (!streq(name_str, udev_device_get_devnode(event->dev) + strlen("/dev/")))) {
6ada823a
KS		 2394 log_error("NAME=\"%s\" ignored, kernel device nodes "
2395 "can not be renamed; please fix it in %s:%u\n", name,
915bf0f6 2396 rules_str(rules, rule->rule.filename_off), rule->rule.filename_line);
6ada823a 2397 break;
0ecfcbd4 2398 }
912541b0
KS		 2399 free(event->name);
2400 event->name = strdup(name_str);
baa30fbc
KS		 2401 log_debug("NAME '%s' %s:%u\n",
2402 event->name,
915bf0f6 2403 rules_str(rules, rule->rule.filename_off),
baa30fbc 2404 rule->rule.filename_line);
912541b0
KS		 2405 break;
2406 }
2407 case TK_A_DEVLINK: {
2408 char temp[UTIL_PATH_SIZE];
2409 char filename[UTIL_PATH_SIZE];
2410 char *pos, *next;
2411 int count = 0;
2412
2413 if (event->devlink_final)
2414 break;
2415 if (major(udev_device_get_devnum(event->dev)) == 0)
2416 break;
2417 if (cur->key.op == OP_ASSIGN_FINAL)
2418 event->devlink_final = true;
2419 if (cur->key.op == OP_ASSIGN || cur->key.op == OP_ASSIGN_FINAL)
2420 udev_device_cleanup_devlinks_list(event->dev);
2421
2422 /* allow multiple symlinks separated by spaces */
915bf0f6 2423 udev_event_apply_format(event, rules_str(rules, cur->key.value_off), temp, sizeof(temp));
912541b0
KS		 2424 if (esc == ESCAPE_UNSET)
2425 count = util_replace_chars(temp, "/ ");
2426 else if (esc == ESCAPE_REPLACE)
2427 count = util_replace_chars(temp, "/");
2428 if (count > 0)
baa30fbc 2429 log_debug("%i character(s) replaced\n" , count);
912541b0
KS		 2430 pos = temp;
2431 while (isspace(pos[0]))
2432 pos++;
2433 next = strchr(pos, ' ');
2434 while (next != NULL) {
2435 next[0] = '\0';
baa30fbc 2436 log_debug("LINK '%s' %s:%u\n", pos,
915bf0f6 2437 rules_str(rules, rule->rule.filename_off), rule->rule.filename_line);
d5a89d7d 2438 strscpyl(filename, sizeof(filename), "/dev/", pos, NULL);
8a173387 2439 udev_device_add_devlink(event->dev, filename);
912541b0
KS		 2440 while (isspace(next[1]))
2441 next++;
2442 pos = &next[1];
2443 next = strchr(pos, ' ');
2444 }
2445 if (pos[0] != '\0') {
baa30fbc 2446 log_debug("LINK '%s' %s:%u\n", pos,
915bf0f6 2447 rules_str(rules, rule->rule.filename_off), rule->rule.filename_line);
d5a89d7d 2448 strscpyl(filename, sizeof(filename), "/dev/", pos, NULL);
8a173387 2449 udev_device_add_devlink(event->dev, filename);
912541b0
KS		 2450 }
2451 break;
2452 }
2453 case TK_A_ATTR: {
915bf0f6 2454 const char *key_name = rules_str(rules, cur->key.attr_off);
912541b0
KS		 2455 char attr[UTIL_PATH_SIZE];
2456 char value[UTIL_NAME_SIZE];
2457 FILE *f;
2458
2459 if (util_resolve_subsys_kernel(event->udev, key_name, attr, sizeof(attr), 0) != 0)
d5a89d7d 2460 strscpyl(attr, sizeof(attr), udev_device_get_syspath(event->dev), "/", key_name, NULL);
912541b0
KS		 2461 attr_subst_subdir(attr, sizeof(attr));
2462
915bf0f6 2463 udev_event_apply_format(event, rules_str(rules, cur->key.value_off), value, sizeof(value));
baa30fbc 2464 log_debug("ATTR '%s' writing '%s' %s:%u\n", attr, value,
915bf0f6 2465 rules_str(rules, rule->rule.filename_off),
baa30fbc 2466 rule->rule.filename_line);
47ef94ac 2467 f = fopen(attr, "we");
912541b0
KS		 2468 if (f != NULL) {
2469 if (fprintf(f, "%s", value) <= 0)
baa30fbc 2470 log_error("error writing ATTR{%s}: %m\n", attr);
912541b0
KS		 2471 fclose(f);
2472 } else {
baa30fbc 2473 log_error("error opening ATTR{%s} for writing: %m\n", attr);
912541b0
KS		 2474 }
2475 break;
2476 }
83cd6b75
KS		 2477 case TK_A_RUN_BUILTIN:
2478 case TK_A_RUN_PROGRAM: {
2479 struct udev_list_entry *entry;
2480
912541b0
KS		 2481 if (cur->key.op == OP_ASSIGN || cur->key.op == OP_ASSIGN_FINAL)
2482 udev_list_cleanup(&event->run_list);
baa30fbc 2483 log_debug("RUN '%s' %s:%u\n",
915bf0f6
KS		 2484 rules_str(rules, cur->key.value_off),
2485 rules_str(rules, rule->rule.filename_off),
baa30fbc 2486 rule->rule.filename_line);
915bf0f6 2487 entry = udev_list_entry_add(&event->run_list, rules_str(rules, cur->key.value_off), NULL);
83cd6b75 2488 udev_list_entry_set_num(entry, cur->key.builtin_cmd);
912541b0
KS		 2489 break;
2490 }
2491 case TK_A_GOTO:
2492 if (cur->key.rule_goto == 0)
2493 break;
2494 cur = &rules->tokens[cur->key.rule_goto];
2495 continue;
2496 case TK_END:
2497 return 0;
2498
2499 case TK_M_PARENTS_MIN:
2500 case TK_M_PARENTS_MAX:
2501 case TK_M_MAX:
2502 case TK_UNSET:
baa30fbc 2503 log_error("wrong type %u\n", cur->type);
912541b0
KS		 2504 goto nomatch;
2505 }
2506
2507 cur++;
2508 continue;
2509 nomatch:
2510 /* fast-forward to next rule */
2511 cur = rule + rule->rule.token_count;
912541b0 2512 }
6880b25d 2513}
761dfddc 2514
84b6ad70 2515int udev_rules_apply_static_dev_perms(struct udev_rules *rules)
761dfddc 2516{
912541b0
KS		 2517 struct token *cur;
2518 struct token *rule;
2519 uid_t uid = 0;
2520 gid_t gid = 0;
2521 mode_t mode = 0;
84b6ad70
TG		 2522 _cleanup_strv_free_ char **tags = NULL;
2523 char **t;
2524 FILE *f = NULL;
2525 _cleanup_free_ char *path = NULL;
2526 int r = 0;
912541b0
KS		 2527
2528 if (rules->tokens == NULL)
84b6ad70 2529 return 0;
912541b0
KS		 2530
2531 cur = &rules->tokens[0];
2532 rule = cur;
2533 for (;;) {
2534 switch (cur->type) {
2535 case TK_RULE:
2536 /* current rule */
2537 rule = cur;
2538
2539 /* skip rules without a static_node tag */
2540 if (!rule->rule.has_static_node)
2541 goto next;
2542
2543 uid = 0;
2544 gid = 0;
2545 mode = 0;
84b6ad70
TG		 2546 strv_free(tags);
2547 tags = NULL;
912541b0
KS		 2548 break;
2549 case TK_A_OWNER_ID:
2550 uid = cur->key.uid;
2551 break;
2552 case TK_A_GROUP_ID:
2553 gid = cur->key.gid;
2554 break;
2555 case TK_A_MODE_ID:
2556 mode = cur->key.mode;
84b6ad70
TG		 2557 break;
2558 case TK_A_TAG:
2559 r = strv_extend(&tags, rules_str(rules, cur->key.value_off));
2560 if (r < 0)
2561 goto finish;
2562
912541b0
KS		 2563 break;
2564 case TK_A_STATIC_NODE: {
84b6ad70
TG		 2565 char device_node[UTIL_PATH_SIZE];
2566 char tags_dir[UTIL_PATH_SIZE];
2567 char tag_symlink[UTIL_PATH_SIZE];
912541b0
KS		 2568 struct stat stats;
2569
2570 /* we assure, that the permissions tokens are sorted before the static token */
84b6ad70 2571 if (mode == 0 && uid == 0 && gid == 0 && tags == NULL)
912541b0 2572 goto next;
84b6ad70
TG		 2573 strscpyl(device_node, sizeof(device_node), "/dev/", rules_str(rules, cur->key.value_off), NULL);
2574 if (stat(device_node, &stats) != 0)
912541b0
KS		 2575 goto next;
2576 if (!S_ISBLK(stats.st_mode) && !S_ISCHR(stats.st_mode))
2577 goto next;
84b6ad70
TG		 2578
2579 if (tags) {
2580 /* Export the tags to a directory as symlinks, allowing otherwise dead nodes to be tagged */
2581
2582 STRV_FOREACH(t, tags) {
2583 _cleanup_free_ char *unescaped_filename = NULL;
2584
2585 strscpyl(tags_dir, sizeof(tags_dir), "/run/udev/static_node-tags/", *t, "/", NULL);
2586 r = mkdir_p(tags_dir, 0755);
2587 if (r < 0) {
2588 log_error("failed to create %s: %s\n", tags_dir, strerror(-r));
2589 return r;
2590 }
2591
2592 unescaped_filename = xescape(rules_str(rules, cur->key.value_off), "/.");
2593
2594 strscpyl(tag_symlink, sizeof(tag_symlink), tags_dir, unescaped_filename, NULL);
2595 r = symlink(device_node, tag_symlink);
2596 if (r < 0 && errno != EEXIST) {
2597 log_error("failed to create symlink %s -> %s: %s\n", tag_symlink, device_node, strerror(errno));
2598 return -errno;
2599 } else
2600 r = 0;
2601 }
2602 }
2603
15a72200
TG		 2604 /* don't touch the permissions if only the tags were set */
2605 if (mode == 0 && uid == 0 && gid == 0)
2606 goto next;
2607
912541b0
KS		 2608 if (mode == 0) {
2609 if (gid > 0)
2610 mode = 0660;
2611 else
2612 mode = 0600;
2613 }
2614 if (mode != (stats.st_mode & 01777)) {
490f0087
TG		 2615 r = chmod(device_node, mode);
2616 if (r < 0) {
2617 log_error("failed to chmod '%s' %#o\n", device_node, mode);
2618 return -errno;
2619 } else
2620 log_debug("chmod '%s' %#o\n", device_node, mode);
912541b0
KS		 2621 }
2622
2623 if ((uid != 0 && uid != stats.st_uid) || (gid != 0 && gid != stats.st_gid)) {
490f0087
TG		 2624 r = chown(device_node, uid, gid);
2625 if (r < 0) {
2626 log_error("failed to chown '%s' %u %u \n", device_node, uid, gid);
2627 return -errno;
2628 } else
2629 log_debug("chown '%s' %u %u\n", device_node, uid, gid);
912541b0
KS		 2630 }
2631
84b6ad70 2632 utimensat(AT_FDCWD, device_node, NULL, 0);
912541b0
KS		 2633 break;
2634 }
2635 case TK_END:
84b6ad70 2636 goto finish;
912541b0
KS		 2637 }
2638
2639 cur++;
2640 continue;
761dfddc 2641next:
912541b0
KS		 2642 /* fast-forward to next rule */
2643 cur = rule + rule->rule.token_count;
2644 continue;
2645 }
84b6ad70
TG		 2646
2647finish:
2648 if (f) {
2649 fflush(f);
2650 fchmod(fileno(f), 0644);
2651 if (ferror(f) || rename(path, "/run/udev/static_node-tags") < 0) {
2652 r = -errno;
2653 unlink("/run/udev/static_node-tags");
2654 unlink(path);
2655 }
2656 fclose(f);
2657 }
2658
2659 return r;
761dfddc 2660}
Unnamed repository; edit this file 'description' to name the repository.