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tree-wide: use IN_SET macro (#6977)
[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
2232cac8 18#include <ctype.h>
4f5dd394
LP		 19#include <errno.h>
20#include <fcntl.h>
cea61f5c 21#include <fnmatch.h>
4f5dd394
LP		 22#include <limits.h>
23#include <stdbool.h>
24#include <stddef.h>
25#include <stdio.h>
26#include <stdlib.h>
27#include <string.h>
959e8b5d 28#include <time.h>
4f5dd394 29#include <unistd.h>
2232cac8 30
b5efdb8a 31#include "alloc-util.h"
2c21044f 32#include "conf-files.h"
8fb3f009 33#include "dirent-util.h"
4f5dd394 34#include "escape.h"
3ffd4af2 35#include "fd-util.h"
fdd21be6 36#include "fs-util.h"
7d50b32a 37#include "glob-util.h"
4f5dd394 38#include "path-util.h"
88b013b2 39#include "proc-cmdline.h"
8fcde012 40#include "stat-util.h"
f4850a1d 41#include "stdio-util.h"
915bf0f6 42#include "strbuf.h"
07630cea 43#include "string-util.h"
84b6ad70 44#include "strv.h"
f4cf2e5b 45#include "sysctl-util.h"
4f5dd394 46#include "udev.h"
b1d4f8e1 47#include "user-util.h"
07630cea 48#include "util.h"
2232cac8 49
a1525d17 50#define PREALLOC_TOKEN 2048
c7521974 51
4052400f 52struct uid_gid {
912541b0
KS		 53 unsigned int name_off;
54 union {
a1525d17
KS		 55 uid_t uid;
56 gid_t gid;
912541b0 57 };
4052400f
KS		 58};
59
2ad8416d
ZJS		 60static const char* const rules_dirs[] = {
61 "/etc/udev/rules.d",
62 "/run/udev/rules.d",
63 UDEVLIBEXECDIR "/rules.d",
4f5dd394
LP		 64 NULL
65};
2ad8416d 66
4052400f 67struct udev_rules {
912541b0 68 struct udev *udev;
97f2d76d 69 usec_t dirs_ts_usec;
912541b0
KS		 70 int resolve_names;
71
72 /* every key in the rules file becomes a token */
73 struct token *tokens;
74 unsigned int token_cur;
75 unsigned int token_max;
76
ab06eef8 77 /* all key strings are copied and de-duplicated in a single continuous string buffer */
915bf0f6 78 struct strbuf *strbuf;
912541b0
KS		 79
80 /* during rule parsing, uid/gid lookup results are cached */
81 struct uid_gid *uids;
82 unsigned int uids_cur;
83 unsigned int uids_max;
84 struct uid_gid *gids;
85 unsigned int gids_cur;
86 unsigned int gids_max;
4052400f
KS		 87};
88
915bf0f6
KS		 89static char *rules_str(struct udev_rules *rules, unsigned int off) {
90 return rules->strbuf->buf + off;
91}
92
93static unsigned int rules_add_string(struct udev_rules *rules, const char *s) {
94 return strbuf_add_string(rules->strbuf, s, strlen(s));
95}
96
8e3ba377 97/* KEY=="", KEY!="", KEY+="", KEY-="", KEY="", KEY:="" */
b0f7409f 98enum operation_type {
912541b0 99 OP_UNSET,
b0f7409f 100
912541b0
KS		 101 OP_MATCH,
102 OP_NOMATCH,
103 OP_MATCH_MAX,
b0f7409f 104
912541b0 105 OP_ADD,
8e3ba377 106 OP_REMOVE,
912541b0
KS		 107 OP_ASSIGN,
108 OP_ASSIGN_FINAL,
c7521974
KS		 109};
110
ac218d9c 111enum string_glob_type {
912541b0 112 GL_UNSET,
a1525d17 113 GL_PLAIN, /* no special chars */
912541b0 114 GL_GLOB, /* shell globs ?,*,[] */
a1525d17
KS		 115 GL_SPLIT, /* multi-value A|B */
116 GL_SPLIT_GLOB, /* multi-value with glob A*|B* */
117 GL_SOMETHING, /* commonly used "?*" */
ac218d9c
KS		 118};
119
32028733 120enum string_subst_type {
912541b0
KS		 121 SB_UNSET,
122 SB_NONE,
123 SB_FORMAT,
124 SB_SUBSYS,
32028733
KS		 125};
126
154a7b84 127/* tokens of a rule are sorted/handled in this order */
6880b25d 128enum token_type {
912541b0
KS		 129 TK_UNSET,
130 TK_RULE,
131
a1525d17
KS		 132 TK_M_ACTION, /* val */
133 TK_M_DEVPATH, /* val */
134 TK_M_KERNEL, /* val */
135 TK_M_DEVLINK, /* val */
136 TK_M_NAME, /* val */
137 TK_M_ENV, /* val, attr */
138 TK_M_TAG, /* val */
139 TK_M_SUBSYSTEM, /* val */
140 TK_M_DRIVER, /* val */
141 TK_M_WAITFOR, /* val */
142 TK_M_ATTR, /* val, attr */
f4cf2e5b 143 TK_M_SYSCTL, /* val, attr */
912541b0
KS		 144
145 TK_M_PARENTS_MIN,
a1525d17 146 TK_M_KERNELS, /* val */
912541b0 147 TK_M_SUBSYSTEMS, /* val */
a1525d17
KS		 148 TK_M_DRIVERS, /* val */
149 TK_M_ATTRS, /* val, attr */
150 TK_M_TAGS, /* val */
912541b0
KS		 151 TK_M_PARENTS_MAX,
152
a1525d17 153 TK_M_TEST, /* val, mode_t */
a1525d17
KS		 154 TK_M_PROGRAM, /* val */
155 TK_M_IMPORT_FILE, /* val */
156 TK_M_IMPORT_PROG, /* val */
157 TK_M_IMPORT_BUILTIN, /* val */
158 TK_M_IMPORT_DB, /* val */
159 TK_M_IMPORT_CMDLINE, /* val */
160 TK_M_IMPORT_PARENT, /* val */
161 TK_M_RESULT, /* val */
912541b0
KS		 162 TK_M_MAX,
163
164 TK_A_STRING_ESCAPE_NONE,
165 TK_A_STRING_ESCAPE_REPLACE,
166 TK_A_DB_PERSIST,
a1525d17
KS		 167 TK_A_INOTIFY_WATCH, /* int */
168 TK_A_DEVLINK_PRIO, /* int */
169 TK_A_OWNER, /* val */
170 TK_A_GROUP, /* val */
171 TK_A_MODE, /* val */
172 TK_A_OWNER_ID, /* uid_t */
173 TK_A_GROUP_ID, /* gid_t */
174 TK_A_MODE_ID, /* mode_t */
84b6ad70 175 TK_A_TAG, /* val */
a1525d17 176 TK_A_STATIC_NODE, /* val */
c26547d6 177 TK_A_SECLABEL, /* val, attr */
a1525d17 178 TK_A_ENV, /* val, attr */
a1525d17
KS		 179 TK_A_NAME, /* val */
180 TK_A_DEVLINK, /* val */
181 TK_A_ATTR, /* val, attr */
f4cf2e5b 182 TK_A_SYSCTL, /* val, attr */
83cd6b75
KS		 183 TK_A_RUN_BUILTIN, /* val, bool */
184 TK_A_RUN_PROGRAM, /* val, bool */
a1525d17 185 TK_A_GOTO, /* size_t */
912541b0
KS		 186
187 TK_END,
c7521974
KS		 188};
189
3f3aa9f5 190/* we try to pack stuff in a way that we take only 12 bytes per token */
4052400f 191struct token {
912541b0
KS		 192 union {
193 unsigned char type; /* same in rule and key */
194 struct {
195 enum token_type type:8;
196 bool can_set_name:1;
197 bool has_static_node:1;
198 unsigned int unused:6;
199 unsigned short token_count;
200 unsigned int label_off;
201 unsigned short filename_off;
202 unsigned short filename_line;
203 } rule;
204 struct {
205 enum token_type type:8;
206 enum operation_type op:8;
207 enum string_glob_type glob:8;
208 enum string_subst_type subst:4;
209 enum string_subst_type attrsubst:4;
210 unsigned int value_off;
211 union {
212 unsigned int attr_off;
912541b0
KS		 213 unsigned int rule_goto;
214 mode_t mode;
215 uid_t uid;
216 gid_t gid;
217 int devlink_prio;
912541b0
KS		 218 int watch;
219 enum udev_builtin_cmd builtin_cmd;
220 };
221 } key;
222 };
4052400f
KS		 223};
224
912541b0 225#define MAX_TK 64
4052400f 226struct rule_tmp {
912541b0
KS		 227 struct udev_rules *rules;
228 struct token rule;
229 struct token token[MAX_TK];
230 unsigned int token_cur;
4052400f
KS		 231};
232
baa30fbc 233#ifdef DEBUG
9ec6e95b 234static const char *operation_str(enum operation_type type) {
912541b0 235 static const char *operation_strs[] = {
a1525d17
KS		 236 [OP_UNSET] = "UNSET",
237 [OP_MATCH] = "match",
238 [OP_NOMATCH] = "nomatch",
912541b0
KS		 239 [OP_MATCH_MAX] = "MATCH_MAX",
240
a1525d17 241 [OP_ADD] = "add",
8e3ba377 242 [OP_REMOVE] = "remove",
a1525d17
KS		 243 [OP_ASSIGN] = "assign",
244 [OP_ASSIGN_FINAL] = "assign-final",
912541b0
KS		 245} ;
246
247 return operation_strs[type];
5d6a1fa6 248}
4052400f 249
9ec6e95b 250static const char *string_glob_str(enum string_glob_type type) {
912541b0 251 static const char *string_glob_strs[] = {
a1525d17
KS		 252 [GL_UNSET] = "UNSET",
253 [GL_PLAIN] = "plain",
254 [GL_GLOB] = "glob",
255 [GL_SPLIT] = "split",
256 [GL_SPLIT_GLOB] = "split-glob",
257 [GL_SOMETHING] = "split-glob",
912541b0
KS		 258 };
259
260 return string_glob_strs[type];
5d6a1fa6
KS		 261}
262
9ec6e95b 263static const char *token_str(enum token_type type) {
912541b0 264 static const char *token_strs[] = {
a1525d17
KS		 265 [TK_UNSET] = "UNSET",
266 [TK_RULE] = "RULE",
912541b0 267
a1525d17 268 [TK_M_ACTION] = "M ACTION",
912541b0 269 [TK_M_DEVPATH] = "M DEVPATH",
a1525d17 270 [TK_M_KERNEL] = "M KERNEL",
912541b0 271 [TK_M_DEVLINK] = "M DEVLINK",
a1525d17
KS		 272 [TK_M_NAME] = "M NAME",
273 [TK_M_ENV] = "M ENV",
274 [TK_M_TAG] = "M TAG",
275 [TK_M_SUBSYSTEM] = "M SUBSYSTEM",
276 [TK_M_DRIVER] = "M DRIVER",
912541b0 277 [TK_M_WAITFOR] = "M WAITFOR",
a1525d17 278 [TK_M_ATTR] = "M ATTR",
f4cf2e5b 279 [TK_M_SYSCTL] = "M SYSCTL",
912541b0 280
a1525d17 281 [TK_M_PARENTS_MIN] = "M PARENTS_MIN",
912541b0 282 [TK_M_KERNELS] = "M KERNELS",
a1525d17 283 [TK_M_SUBSYSTEMS] = "M SUBSYSTEMS",
912541b0 284 [TK_M_DRIVERS] = "M DRIVERS",
a1525d17
KS		 285 [TK_M_ATTRS] = "M ATTRS",
286 [TK_M_TAGS] = "M TAGS",
287 [TK_M_PARENTS_MAX] = "M PARENTS_MAX",
912541b0 288
a1525d17 289 [TK_M_TEST] = "M TEST",
912541b0 290 [TK_M_PROGRAM] = "M PROGRAM",
a1525d17
KS		 291 [TK_M_IMPORT_FILE] = "M IMPORT_FILE",
292 [TK_M_IMPORT_PROG] = "M IMPORT_PROG",
293 [TK_M_IMPORT_BUILTIN] = "M IMPORT_BUILTIN",
294 [TK_M_IMPORT_DB] = "M IMPORT_DB",
295 [TK_M_IMPORT_CMDLINE] = "M IMPORT_CMDLINE",
296 [TK_M_IMPORT_PARENT] = "M IMPORT_PARENT",
297 [TK_M_RESULT] = "M RESULT",
298 [TK_M_MAX] = "M MAX",
299
300 [TK_A_STRING_ESCAPE_NONE] = "A STRING_ESCAPE_NONE",
301 [TK_A_STRING_ESCAPE_REPLACE] = "A STRING_ESCAPE_REPLACE",
302 [TK_A_DB_PERSIST] = "A DB_PERSIST",
303 [TK_A_INOTIFY_WATCH] = "A INOTIFY_WATCH",
304 [TK_A_DEVLINK_PRIO] = "A DEVLINK_PRIO",
305 [TK_A_OWNER] = "A OWNER",
306 [TK_A_GROUP] = "A GROUP",
307 [TK_A_MODE] = "A MODE",
308 [TK_A_OWNER_ID] = "A OWNER_ID",
309 [TK_A_GROUP_ID] = "A GROUP_ID",
310 [TK_A_STATIC_NODE] = "A STATIC_NODE",
c26547d6 311 [TK_A_SECLABEL] = "A SECLABEL",
912541b0 312 [TK_A_MODE_ID] = "A MODE_ID",
a1525d17
KS		 313 [TK_A_ENV] = "A ENV",
314 [TK_A_TAG] = "A ENV",
315 [TK_A_NAME] = "A NAME",
912541b0 316 [TK_A_DEVLINK] = "A DEVLINK",
a1525d17 317 [TK_A_ATTR] = "A ATTR",
f4cf2e5b 318 [TK_A_SYSCTL] = "A SYSCTL",
83cd6b75
KS		 319 [TK_A_RUN_BUILTIN] = "A RUN_BUILTIN",
320 [TK_A_RUN_PROGRAM] = "A RUN_PROGRAM",
a1525d17 321 [TK_A_GOTO] = "A GOTO",
912541b0 322
a1525d17 323 [TK_END] = "END",
912541b0
KS		 324 };
325
326 return token_strs[type];
5d6a1fa6 327}
c7521974 328
9ec6e95b 329static void dump_token(struct udev_rules *rules, struct token *token) {
912541b0
KS		 330 enum token_type type = token->type;
331 enum operation_type op = token->key.op;
332 enum string_glob_type glob = token->key.glob;
fa394301
LR		 333 const char *value = rules_str(rules, token->key.value_off);
334 const char *attr = &rules->strbuf->buf[token->key.attr_off];
912541b0
KS		 335
336 switch (type) {
337 case TK_RULE:
338 {
339 const char *tks_ptr = (char *)rules->tokens;
340 const char *tk_ptr = (char *)token;
341 unsigned int idx = (tk_ptr - tks_ptr) / sizeof(struct token);
342
9f6445e3 343 log_debug("* RULE %s:%u, token: %u, count: %u, label: '%s'",
fa394301 344 &rules->strbuf->buf[token->rule.filename_off], token->rule.filename_line,
baa30fbc 345 idx, token->rule.token_count,
fa394301 346 &rules->strbuf->buf[token->rule.label_off]);
912541b0
KS		 347 break;
348 }
349 case TK_M_ACTION:
350 case TK_M_DEVPATH:
351 case TK_M_KERNEL:
352 case TK_M_SUBSYSTEM:
353 case TK_M_DRIVER:
354 case TK_M_WAITFOR:
355 case TK_M_DEVLINK:
356 case TK_M_NAME:
357 case TK_M_KERNELS:
358 case TK_M_SUBSYSTEMS:
359 case TK_M_DRIVERS:
360 case TK_M_TAGS:
361 case TK_M_PROGRAM:
362 case TK_M_IMPORT_FILE:
363 case TK_M_IMPORT_PROG:
364 case TK_M_IMPORT_DB:
365 case TK_M_IMPORT_CMDLINE:
366 case TK_M_IMPORT_PARENT:
367 case TK_M_RESULT:
368 case TK_A_NAME:
369 case TK_A_DEVLINK:
370 case TK_A_OWNER:
371 case TK_A_GROUP:
372 case TK_A_MODE:
83cd6b75
KS		 373 case TK_A_RUN_BUILTIN:
374 case TK_A_RUN_PROGRAM:
9f6445e3 375 log_debug("%s %s '%s'(%s)",
baa30fbc 376 token_str(type), operation_str(op), value, string_glob_str(glob));
912541b0
KS		 377 break;
378 case TK_M_IMPORT_BUILTIN:
9f6445e3 379 log_debug("%s %i '%s'", token_str(type), token->key.builtin_cmd, value);
912541b0
KS		 380 break;
381 case TK_M_ATTR:
f4cf2e5b 382 case TK_M_SYSCTL:
912541b0
KS		 383 case TK_M_ATTRS:
384 case TK_M_ENV:
385 case TK_A_ATTR:
f4cf2e5b 386 case TK_A_SYSCTL:
912541b0 387 case TK_A_ENV:
9f6445e3 388 log_debug("%s %s '%s' '%s'(%s)",
baa30fbc 389 token_str(type), operation_str(op), attr, value, string_glob_str(glob));
912541b0
KS		 390 break;
391 case TK_M_TAG:
392 case TK_A_TAG:
9f6445e3 393 log_debug("%s %s '%s'", token_str(type), operation_str(op), value);
912541b0
KS		 394 break;
395 case TK_A_STRING_ESCAPE_NONE:
396 case TK_A_STRING_ESCAPE_REPLACE:
397 case TK_A_DB_PERSIST:
9f6445e3 398 log_debug("%s", token_str(type));
912541b0
KS		 399 break;
400 case TK_M_TEST:
9f6445e3 401 log_debug("%s %s '%s'(%s) %#o",
baa30fbc 402 token_str(type), operation_str(op), value, string_glob_str(glob), token->key.mode);
912541b0
KS		 403 break;
404 case TK_A_INOTIFY_WATCH:
9f6445e3 405 log_debug("%s %u", token_str(type), token->key.watch);
912541b0
KS		 406 break;
407 case TK_A_DEVLINK_PRIO:
9f6445e3 408 log_debug("%s %u", token_str(type), token->key.devlink_prio);
912541b0
KS		 409 break;
410 case TK_A_OWNER_ID:
9f6445e3 411 log_debug("%s %s %u", token_str(type), operation_str(op), token->key.uid);
912541b0
KS		 412 break;
413 case TK_A_GROUP_ID:
9f6445e3 414 log_debug("%s %s %u", token_str(type), operation_str(op), token->key.gid);
912541b0
KS		 415 break;
416 case TK_A_MODE_ID:
9f6445e3 417 log_debug("%s %s %#o", token_str(type), operation_str(op), token->key.mode);
912541b0
KS		 418 break;
419 case TK_A_STATIC_NODE:
9f6445e3 420 log_debug("%s '%s'", token_str(type), value);
912541b0 421 break;
c26547d6 422 case TK_A_SECLABEL:
9f6445e3 423 log_debug("%s %s '%s' '%s'", token_str(type), operation_str(op), attr, value);
c26547d6 424 break;
912541b0 425 case TK_A_GOTO:
9f6445e3 426 log_debug("%s '%s' %u", token_str(type), value, token->key.rule_goto);
912541b0
KS		 427 break;
428 case TK_END:
9f6445e3 429 log_debug("* %s", token_str(type));
912541b0
KS		 430 break;
431 case TK_M_PARENTS_MIN:
432 case TK_M_PARENTS_MAX:
433 case TK_M_MAX:
434 case TK_UNSET:
9f6445e3 435 log_debug("unknown type %u", type);
912541b0
KS		 436 break;
437 }
4052400f 438}
154a7b84 439
9ec6e95b 440static void dump_rules(struct udev_rules *rules) {
912541b0
KS		 441 unsigned int i;
442
fa394301 443 log_debug("dumping %u (%zu bytes) tokens, %zu (%zu bytes) strings",
baa30fbc
KS		 444 rules->token_cur,
445 rules->token_cur * sizeof(struct token),
fa394301
LR		 446 rules->strbuf->nodes_count,
447 rules->strbuf->len);
f168c273 448 for (i = 0; i < rules->token_cur; i++)
912541b0 449 dump_token(rules, &rules->tokens[i]);
4052400f
KS		 450}
451#else
4052400f
KS		 452static inline void dump_token(struct udev_rules *rules, struct token *token) {}
453static inline void dump_rules(struct udev_rules *rules) {}
baa30fbc 454#endif /* DEBUG */
c7521974 455
9ec6e95b 456static int add_token(struct udev_rules *rules, struct token *token) {
912541b0
KS		 457 /* grow buffer if needed */
458 if (rules->token_cur+1 >= rules->token_max) {
459 struct token *tokens;
460 unsigned int add;
461
462 /* double the buffer size */
463 add = rules->token_max;
464 if (add < 8)
465 add = 8;
466
467 tokens = realloc(rules->tokens, (rules->token_max + add ) * sizeof(struct token));
468 if (tokens == NULL)
469 return -1;
912541b0
KS		 470 rules->tokens = tokens;
471 rules->token_max += add;
472 }
473 memcpy(&rules->tokens[rules->token_cur], token, sizeof(struct token));
474 rules->token_cur++;
475 return 0;
c7521974 476}
a27cd06c 477
2da03cbf
ZJS		 478static void log_unknown_owner(int error, const char *entity, const char *owner) {
479 if (IN_SET(abs(error), ENOENT, ESRCH))
480 log_error("Specified %s '%s' unknown", entity, owner);
481 else
482 log_error_errno(error, "Error resolving %s '%s': %m", entity, owner);
483}
484
9ec6e95b 485static uid_t add_uid(struct udev_rules *rules, const char *owner) {
912541b0 486 unsigned int i;
23bf8dd7 487 uid_t uid = 0;
912541b0 488 unsigned int off;
23bf8dd7 489 int r;
912541b0
KS		 490
491 /* lookup, if we know it already */
492 for (i = 0; i < rules->uids_cur; i++) {
493 off = rules->uids[i].name_off;
915bf0f6 494 if (streq(rules_str(rules, off), owner)) {
912541b0 495 uid = rules->uids[i].uid;
912541b0
KS		 496 return uid;
497 }
498 }
23bf8dd7 499 r = get_user_creds(&owner, &uid, NULL, NULL, NULL);
2da03cbf
ZJS		 500 if (r < 0)
501 log_unknown_owner(r, "user", owner);
912541b0
KS		 502
503 /* grow buffer if needed */
504 if (rules->uids_cur+1 >= rules->uids_max) {
505 struct uid_gid *uids;
506 unsigned int add;
507
508 /* double the buffer size */
509 add = rules->uids_max;
510 if (add < 1)
511 add = 8;
512
513 uids = realloc(rules->uids, (rules->uids_max + add ) * sizeof(struct uid_gid));
514 if (uids == NULL)
515 return uid;
912541b0
KS		 516 rules->uids = uids;
517 rules->uids_max += add;
518 }
519 rules->uids[rules->uids_cur].uid = uid;
915bf0f6 520 off = rules_add_string(rules, owner);
912541b0
KS		 521 if (off <= 0)
522 return uid;
523 rules->uids[rules->uids_cur].name_off = off;
524 rules->uids_cur++;
525 return uid;
154a7b84
KS		 526}
527
9ec6e95b 528static gid_t add_gid(struct udev_rules *rules, const char *group) {
912541b0 529 unsigned int i;
23bf8dd7 530 gid_t gid = 0;
912541b0 531 unsigned int off;
23bf8dd7 532 int r;
912541b0
KS		 533
534 /* lookup, if we know it already */
535 for (i = 0; i < rules->gids_cur; i++) {
536 off = rules->gids[i].name_off;
915bf0f6 537 if (streq(rules_str(rules, off), group)) {
912541b0 538 gid = rules->gids[i].gid;
912541b0
KS		 539 return gid;
540 }
541 }
23bf8dd7 542 r = get_group_creds(&group, &gid);
2da03cbf
ZJS		 543 if (r < 0)
544 log_unknown_owner(r, "group", group);
912541b0
KS		 545
546 /* grow buffer if needed */
547 if (rules->gids_cur+1 >= rules->gids_max) {
548 struct uid_gid *gids;
549 unsigned int add;
550
551 /* double the buffer size */
552 add = rules->gids_max;
553 if (add < 1)
554 add = 8;
555
556 gids = realloc(rules->gids, (rules->gids_max + add ) * sizeof(struct uid_gid));
557 if (gids == NULL)
558 return gid;
912541b0
KS		 559 rules->gids = gids;
560 rules->gids_max += add;
561 }
562 rules->gids[rules->gids_cur].gid = gid;
915bf0f6 563 off = rules_add_string(rules, group);
912541b0
KS		 564 if (off <= 0)
565 return gid;
566 rules->gids[rules->gids_cur].name_off = off;
567 rules->gids_cur++;
568 return gid;
154a7b84
KS		 569}
570
9ec6e95b 571static int import_property_from_string(struct udev_device *dev, char *line) {
912541b0
KS		 572 char *key;
573 char *val;
574 size_t len;
575
576 /* find key */
577 key = line;
578 while (isspace(key[0]))
579 key++;
580
581 /* comment or empty line */
4c701096 582 if (IN_SET(key[0], '#', '\0'))
912541b0
KS		 583 return -1;
584
585 /* split key/value */
586 val = strchr(key, '=');
587 if (val == NULL)
588 return -1;
589 val[0] = '\0';
590 val++;
591
592 /* find value */
593 while (isspace(val[0]))
594 val++;
595
596 /* terminate key */
597 len = strlen(key);
598 if (len == 0)
599 return -1;
600 while (isspace(key[len-1]))
601 len--;
602 key[len] = '\0';
603
604 /* terminate value */
605 len = strlen(val);
606 if (len == 0)
607 return -1;
608 while (isspace(val[len-1]))
609 len--;
610 val[len] = '\0';
611
612 if (len == 0)
613 return -1;
614
615 /* unquote */
4c701096 616 if (IN_SET(val[0], '"', '\'')) {
cd05bb8b 617 if (len == 1 || val[len-1] != val[0]) {
9f6445e3 618 log_debug("inconsistent quoting: '%s', skip", line);
912541b0
KS		 619 return -1;
620 }
621 val[len-1] = '\0';
622 val++;
623 }
624
df546eb5 625 udev_device_add_property(dev, key, val);
0aa5b4d1 626
912541b0 627 return 0;
be4bedd1
KS		 628}
629
9ec6e95b 630static int import_file_into_properties(struct udev_device *dev, const char *filename) {
912541b0
KS		 631 FILE *f;
632 char line[UTIL_LINE_SIZE];
633
47ef94ac 634 f = fopen(filename, "re");
912541b0
KS		 635 if (f == NULL)
636 return -1;
637 while (fgets(line, sizeof(line), f) != NULL)
638 import_property_from_string(dev, line);
639 fclose(f);
640 return 0;
bd0ed2ff
KS		 641}
642
dd5eddd2
KS		 643static int import_program_into_properties(struct udev_event *event,
644 usec_t timeout_usec,
67117413 645 usec_t timeout_warn_usec,
8314de1d 646 const char *program) {
912541b0
KS		 647 char result[UTIL_LINE_SIZE];
648 char *line;
649 int err;
650
bbf35206 651 err = udev_event_spawn(event, timeout_usec, timeout_warn_usec, true, program, result, sizeof(result));
912541b0
KS		 652 if (err < 0)
653 return err;
654
655 line = result;
656 while (line != NULL) {
657 char *pos;
658
659 pos = strchr(line, '\n');
660 if (pos != NULL) {
661 pos[0] = '\0';
662 pos = &pos[1];
663 }
bbf35206 664 import_property_from_string(event->dev, line);
912541b0
KS		 665 line = pos;
666 }
667 return 0;
319c6700
KS		 668}
669
9ec6e95b 670static int import_parent_into_properties(struct udev_device *dev, const char *filter) {
912541b0
KS		 671 struct udev_device *dev_parent;
672 struct udev_list_entry *list_entry;
673
3b64e4d4
TG		 674 assert(dev);
675 assert(filter);
676
912541b0
KS		 677 dev_parent = udev_device_get_parent(dev);
678 if (dev_parent == NULL)
679 return -1;
680
912541b0
KS		 681 udev_list_entry_foreach(list_entry, udev_device_get_properties_list_entry(dev_parent)) {
682 const char *key = udev_list_entry_get_name(list_entry);
683 const char *val = udev_list_entry_get_value(list_entry);
684
ece174c5 685 if (fnmatch(filter, key, 0) == 0)
df546eb5 686 udev_device_add_property(dev, key, val);
912541b0
KS		 687 }
688 return 0;
e2ecb34f
KS		 689}
690
f4850a1d
ZJS		 691static void attr_subst_subdir(char *attr, size_t len) {
692 const char *pos, *tail, *path;
693 _cleanup_closedir_ DIR *dir = NULL;
694 struct dirent *dent;
695
696 pos = strstr(attr, "/*/");
697 if (!pos)
698 return;
699
700 tail = pos + 2;
701 path = strndupa(attr, pos - attr + 1); /* include slash at end */
702 dir = opendir(path);
703 if (dir == NULL)
704 return;
705
8fb3f009 706 FOREACH_DIRENT_ALL(dent, dir, break)
f4850a1d 707 if (dent->d_name[0] != '.') {
916a8d43 708 char n[strlen(dent->d_name) + strlen(tail) + 1];
f4850a1d 709
916a8d43
ZJS		 710 strscpyl(n, sizeof n, dent->d_name, tail, NULL);
711 if (faccessat(dirfd(dir), n, F_OK, 0) == 0) {
f4850a1d
ZJS		 712 strscpyl(attr, len, path, n, NULL);
713 break;
912541b0 714 }
912541b0 715 }
0ea5e96e
KS		 716}
717
9ec6e95b 718static int get_key(struct udev *udev, char **line, char **key, enum operation_type *op, char **value) {
912541b0
KS		 719 char *linepos;
720 char *temp;
7e760b79 721 unsigned i, j;
912541b0
KS		 722
723 linepos = *line;
724 if (linepos == NULL || linepos[0] == '\0')
725 return -1;
726
727 /* skip whitespace */
728 while (isspace(linepos[0]) || linepos[0] == ',')
729 linepos++;
730
731 /* get the key */
732 if (linepos[0] == '\0')
733 return -1;
734 *key = linepos;
735
736 for (;;) {
737 linepos++;
738 if (linepos[0] == '\0')
739 return -1;
740 if (isspace(linepos[0]))
741 break;
742 if (linepos[0] == '=')
743 break;
4c701096 744 if (IN_SET(linepos[0], '+', '-', '!', ':'))
912541b0
KS		 745 if (linepos[1] == '=')
746 break;
747 }
748
749 /* remember end of key */
750 temp = linepos;
751
752 /* skip whitespace after key */
753 while (isspace(linepos[0]))
754 linepos++;
755 if (linepos[0] == '\0')
756 return -1;
757
758 /* get operation type */
759 if (linepos[0] == '=' && linepos[1] == '=') {
760 *op = OP_MATCH;
761 linepos += 2;
762 } else if (linepos[0] == '!' && linepos[1] == '=') {
763 *op = OP_NOMATCH;
764 linepos += 2;
765 } else if (linepos[0] == '+' && linepos[1] == '=') {
766 *op = OP_ADD;
767 linepos += 2;
8e3ba377
DH		 768 } else if (linepos[0] == '-' && linepos[1] == '=') {
769 *op = OP_REMOVE;
770 linepos += 2;
912541b0
KS		 771 } else if (linepos[0] == '=') {
772 *op = OP_ASSIGN;
773 linepos++;
774 } else if (linepos[0] == ':' && linepos[1] == '=') {
775 *op = OP_ASSIGN_FINAL;
776 linepos += 2;
777 } else
778 return -1;
779
780 /* terminate key */
781 temp[0] = '\0';
782
783 /* skip whitespace after operator */
784 while (isspace(linepos[0]))
785 linepos++;
786 if (linepos[0] == '\0')
787 return -1;
788
789 /* get the value */
790 if (linepos[0] == '"')
791 linepos++;
792 else
793 return -1;
794 *value = linepos;
795
796 /* terminate */
7e760b79
FB		 797 for (i = 0, j = 0; ; i++, j++) {
798
799 if (linepos[i] == '"')
800 break;
801
802 if (linepos[i] == '\0')
803 return -1;
804
805 /* double quotes can be escaped */
806 if (linepos[i] == '\\')
807 if (linepos[i+1] == '"')
808 i++;
809
810 linepos[j] = linepos[i];
811 }
812 linepos[j] = '\0';
912541b0
KS		 813
814 /* move line to next key */
7e760b79 815 *line = linepos + i + 1;
912541b0 816 return 0;
6880b25d 817}
95776dc6 818
6880b25d 819/* extract possible KEY{attr} */
9ec6e95b 820static const char *get_key_attribute(struct udev *udev, char *str) {
912541b0
KS		 821 char *pos;
822 char *attr;
823
824 attr = strchr(str, '{');
825 if (attr != NULL) {
826 attr++;
827 pos = strchr(attr, '}');
828 if (pos == NULL) {
25f027c5 829 log_error("Missing closing brace for format");
912541b0
KS		 830 return NULL;
831 }
832 pos[0] = '\0';
912541b0
KS		 833 return attr;
834 }
835 return NULL;
6880b25d 836}
95776dc6 837
19a8e656
ZJS		 838static void rule_add_key(struct rule_tmp *rule_tmp, enum token_type type,
839 enum operation_type op,
840 const char *value, const void *data) {
841 struct token *token = rule_tmp->token + rule_tmp->token_cur;
912541b0
KS		 842 const char *attr = NULL;
843
19a8e656 844 assert(rule_tmp->token_cur < ELEMENTSOF(rule_tmp->token));
29804cc1 845 memzero(token, sizeof(struct token));
912541b0
KS		 846
847 switch (type) {
848 case TK_M_ACTION:
849 case TK_M_DEVPATH:
850 case TK_M_KERNEL:
851 case TK_M_SUBSYSTEM:
852 case TK_M_DRIVER:
853 case TK_M_WAITFOR:
854 case TK_M_DEVLINK:
855 case TK_M_NAME:
856 case TK_M_KERNELS:
857 case TK_M_SUBSYSTEMS:
858 case TK_M_DRIVERS:
859 case TK_M_TAGS:
860 case TK_M_PROGRAM:
861 case TK_M_IMPORT_FILE:
862 case TK_M_IMPORT_PROG:
863 case TK_M_IMPORT_DB:
864 case TK_M_IMPORT_CMDLINE:
865 case TK_M_IMPORT_PARENT:
866 case TK_M_RESULT:
867 case TK_A_OWNER:
868 case TK_A_GROUP:
869 case TK_A_MODE:
8a173387 870 case TK_A_DEVLINK:
912541b0
KS		 871 case TK_A_NAME:
872 case TK_A_GOTO:
873 case TK_M_TAG:
874 case TK_A_TAG:
d6f116a7 875 case TK_A_STATIC_NODE:
915bf0f6 876 token->key.value_off = rules_add_string(rule_tmp->rules, value);
912541b0
KS		 877 break;
878 case TK_M_IMPORT_BUILTIN:
915bf0f6 879 token->key.value_off = rules_add_string(rule_tmp->rules, value);
912541b0
KS		 880 token->key.builtin_cmd = *(enum udev_builtin_cmd *)data;
881 break;
882 case TK_M_ENV:
883 case TK_M_ATTR:
f4cf2e5b 884 case TK_M_SYSCTL:
912541b0
KS		 885 case TK_M_ATTRS:
886 case TK_A_ATTR:
f4cf2e5b 887 case TK_A_SYSCTL:
912541b0 888 case TK_A_ENV:
c26547d6 889 case TK_A_SECLABEL:
912541b0 890 attr = data;
915bf0f6
KS		 891 token->key.value_off = rules_add_string(rule_tmp->rules, value);
892 token->key.attr_off = rules_add_string(rule_tmp->rules, attr);
912541b0 893 break;
912541b0 894 case TK_M_TEST:
915bf0f6 895 token->key.value_off = rules_add_string(rule_tmp->rules, value);
912541b0
KS		 896 if (data != NULL)
897 token->key.mode = *(mode_t *)data;
898 break;
899 case TK_A_STRING_ESCAPE_NONE:
900 case TK_A_STRING_ESCAPE_REPLACE:
901 case TK_A_DB_PERSIST:
902 break;
83cd6b75 903 case TK_A_RUN_BUILTIN:
83cd6b75 904 case TK_A_RUN_PROGRAM:
4590cfe4 905 token->key.builtin_cmd = *(enum udev_builtin_cmd *)data;
915bf0f6 906 token->key.value_off = rules_add_string(rule_tmp->rules, value);
912541b0
KS		 907 break;
908 case TK_A_INOTIFY_WATCH:
909 case TK_A_DEVLINK_PRIO:
910 token->key.devlink_prio = *(int *)data;
911 break;
912 case TK_A_OWNER_ID:
913 token->key.uid = *(uid_t *)data;
914 break;
915 case TK_A_GROUP_ID:
916 token->key.gid = *(gid_t *)data;
917 break;
918 case TK_A_MODE_ID:
919 token->key.mode = *(mode_t *)data;
920 break;
912541b0
KS		 921 case TK_RULE:
922 case TK_M_PARENTS_MIN:
923 case TK_M_PARENTS_MAX:
924 case TK_M_MAX:
925 case TK_END:
926 case TK_UNSET:
19a8e656 927 assert_not_reached("wrong type");
912541b0
KS		 928 }
929
930 if (value != NULL && type < TK_M_MAX) {
931 /* check if we need to split or call fnmatch() while matching rules */
932 enum string_glob_type glob;
933 int has_split;
934 int has_glob;
935
936 has_split = (strchr(value, '|') != NULL);
e3e0314b 937 has_glob = string_is_glob(value);
912541b0
KS		 938 if (has_split && has_glob) {
939 glob = GL_SPLIT_GLOB;
940 } else if (has_split) {
941 glob = GL_SPLIT;
942 } else if (has_glob) {
33502ffe 943 if (streq(value, "?*"))
912541b0
KS		 944 glob = GL_SOMETHING;
945 else
946 glob = GL_GLOB;
947 } else {
948 glob = GL_PLAIN;
949 }
950 token->key.glob = glob;
951 }
952
953 if (value != NULL && type > TK_M_MAX) {
954 /* check if assigned value has substitution chars */
955 if (value[0] == '[')
956 token->key.subst = SB_SUBSYS;
957 else if (strchr(value, '%') != NULL || strchr(value, '$') != NULL)
958 token->key.subst = SB_FORMAT;
959 else
960 token->key.subst = SB_NONE;
961 }
962
963 if (attr != NULL) {
d6f116a7 964 /* check if property/attribute name has substitution chars */
912541b0
KS		 965 if (attr[0] == '[')
966 token->key.attrsubst = SB_SUBSYS;
967 else if (strchr(attr, '%') != NULL || strchr(attr, '$') != NULL)
968 token->key.attrsubst = SB_FORMAT;
969 else
970 token->key.attrsubst = SB_NONE;
971 }
972
973 token->key.type = type;
974 token->key.op = op;
975 rule_tmp->token_cur++;
6880b25d 976}
e57e7bc1 977
9ec6e95b 978static int sort_token(struct udev_rules *rules, struct rule_tmp *rule_tmp) {
912541b0
KS		 979 unsigned int i;
980 unsigned int start = 0;
981 unsigned int end = rule_tmp->token_cur;
982
983 for (i = 0; i < rule_tmp->token_cur; i++) {
984 enum token_type next_val = TK_UNSET;
985 unsigned int next_idx = 0;
986 unsigned int j;
987
988 /* find smallest value */
989 for (j = start; j < end; j++) {
990 if (rule_tmp->token[j].type == TK_UNSET)
991 continue;
992 if (next_val == TK_UNSET || rule_tmp->token[j].type < next_val) {
993 next_val = rule_tmp->token[j].type;
994 next_idx = j;
995 }
996 }
997
998 /* add token and mark done */
999 if (add_token(rules, &rule_tmp->token[next_idx]) != 0)
1000 return -1;
1001 rule_tmp->token[next_idx].type = TK_UNSET;
1002
1003 /* shrink range */
1004 if (next_idx == start)
1005 start++;
1006 if (next_idx+1 == end)
1007 end--;
1008 }
1009 return 0;
724257d9
GKH		 1010}
1011
19a8e656
ZJS		 1012#define LOG_RULE_ERROR(fmt, ...) log_error("Invalid rule %s:%u: " fmt, filename, lineno, ##__VA_ARGS__)
1013#define LOG_RULE_WARNING(fmt, ...) log_warning("%s:%u: " fmt, filename, lineno, ##__VA_ARGS__)
1014#define LOG_RULE_DEBUG(fmt, ...) log_debug("%s:%u: " fmt, filename, lineno, ##__VA_ARGS__)
1015#define LOG_AND_RETURN(fmt, ...) { LOG_RULE_ERROR(fmt, __VA_ARGS__); return; }
1016
4fd6af76
ZJS		 1017static void add_rule(struct udev_rules *rules, char *line,
1018 const char *filename, unsigned int filename_off, unsigned int lineno) {
912541b0 1019 char *linepos;
04a9d3a0 1020 const char *attr;
84198c18
TG		 1021 struct rule_tmp rule_tmp = {
1022 .rules = rules,
1023 .rule.type = TK_RULE,
1024 };
912541b0 1025
775f8b3c
KS		 1026 /* the offset in the rule is limited to unsigned short */
1027 if (filename_off < USHRT_MAX)
1028 rule_tmp.rule.rule.filename_off = filename_off;
912541b0
KS		 1029 rule_tmp.rule.rule.filename_line = lineno;
1030
1031 linepos = line;
1032 for (;;) {
1033 char *key;
1034 char *value;
1035 enum operation_type op;
1036
e736cf35 1037 if (get_key(rules->udev, &linepos, &key, &op, &value) != 0) {
3cf0f8f7
DR		 1038 /* Avoid erroring on trailing whitespace. This is probably rare
1039 * so save the work for the error case instead of always trying
1040 * to strip the trailing whitespace with strstrip(). */
1041 while (isblank(*linepos))
1042 linepos++;
1043
e736cf35
DR		 1044 /* If we aren't at the end of the line, this is a parsing error.
1045 * Make a best effort to describe where the problem is. */
2783fe06 1046 if (!strchr(NEWLINE, *linepos)) {
6501b52d 1047 char buf[2] = {*linepos};
1291bc89
ZJS		 1048 _cleanup_free_ char *tmp;
1049
1050 tmp = cescape(buf);
ff49bc32 1051 log_error("invalid key/value pair in file %s on line %u, starting at character %tu ('%s')",
1291bc89 1052 filename, lineno, linepos - line + 1, tmp);
6501b52d 1053 if (*linepos == '#')
75716dd8 1054 log_error("hint: comments can only start at beginning of line");
1291bc89 1055 }
912541b0 1056 break;
e736cf35 1057 }
912541b0 1058
19a8e656
ZJS		 1059 if (rule_tmp.token_cur >= ELEMENTSOF(rule_tmp.token))
1060 LOG_AND_RETURN("temporary rule array too small, aborting event processing with %u items", rule_tmp.token_cur);
1061
33502ffe 1062 if (streq(key, "ACTION")) {
19a8e656
ZJS		 1063 if (op > OP_MATCH_MAX)
1064 LOG_AND_RETURN("invalid %s operation", key);
1065
912541b0 1066 rule_add_key(&rule_tmp, TK_M_ACTION, op, value, NULL);
912541b0 1067
99f16bb8 1068 } else if (streq(key, "DEVPATH")) {
19a8e656
ZJS		 1069 if (op > OP_MATCH_MAX)
1070 LOG_AND_RETURN("invalid %s operation", key);
1071
912541b0 1072 rule_add_key(&rule_tmp, TK_M_DEVPATH, op, value, NULL);
912541b0 1073
99f16bb8 1074 } else if (streq(key, "KERNEL")) {
19a8e656
ZJS		 1075 if (op > OP_MATCH_MAX)
1076 LOG_AND_RETURN("invalid %s operation", key);
1077
912541b0 1078 rule_add_key(&rule_tmp, TK_M_KERNEL, op, value, NULL);
912541b0 1079
99f16bb8 1080 } else if (streq(key, "SUBSYSTEM")) {
19a8e656
ZJS		 1081 if (op > OP_MATCH_MAX)
1082 LOG_AND_RETURN("invalid %s operation", key);
1083
912541b0 1084 /* bus, class, subsystem events should all be the same */
99f16bb8
ZJS		 1085 if (STR_IN_SET(value, "subsystem", "bus", "class")) {
1086 if (!streq(value, "subsystem"))
19a8e656
ZJS		 1087 LOG_RULE_WARNING("'%s' must be specified as 'subsystem'; please fix", value);
1088
912541b0
KS		 1089 rule_add_key(&rule_tmp, TK_M_SUBSYSTEM, op, "subsystem|class|bus", NULL);
1090 } else
1091 rule_add_key(&rule_tmp, TK_M_SUBSYSTEM, op, value, NULL);
912541b0 1092
99f16bb8 1093 } else if (streq(key, "DRIVER")) {
19a8e656
ZJS		 1094 if (op > OP_MATCH_MAX)
1095 LOG_AND_RETURN("invalid %s operation", key);
1096
912541b0 1097 rule_add_key(&rule_tmp, TK_M_DRIVER, op, value, NULL);
912541b0 1098
99f16bb8 1099 } else if (startswith(key, "ATTR{")) {
f8294e41 1100 attr = get_key_attribute(rules->udev, key + strlen("ATTR"));
19a8e656
ZJS		 1101 if (attr == NULL)
1102 LOG_AND_RETURN("error parsing %s attribute", "ATTR");
1103
1104 if (op == OP_REMOVE)
1105 LOG_AND_RETURN("invalid %s operation", "ATTR");
1106
f4cf2e5b 1107 if (op < OP_MATCH_MAX)
912541b0 1108 rule_add_key(&rule_tmp, TK_M_ATTR, op, value, attr);
f4cf2e5b 1109 else
912541b0 1110 rule_add_key(&rule_tmp, TK_A_ATTR, op, value, attr);
f4cf2e5b 1111
99f16bb8 1112 } else if (startswith(key, "SYSCTL{")) {
f4cf2e5b 1113 attr = get_key_attribute(rules->udev, key + strlen("SYSCTL"));
19a8e656
ZJS		 1114 if (attr == NULL)
1115 LOG_AND_RETURN("error parsing %s attribute", "ATTR");
1116
1117 if (op == OP_REMOVE)
1118 LOG_AND_RETURN("invalid %s operation", "ATTR");
1119
f4cf2e5b
KS		 1120 if (op < OP_MATCH_MAX)
1121 rule_add_key(&rule_tmp, TK_M_SYSCTL, op, value, attr);
1122 else
1123 rule_add_key(&rule_tmp, TK_A_SYSCTL, op, value, attr);
912541b0 1124
99f16bb8 1125 } else if (startswith(key, "SECLABEL{")) {
f8294e41 1126 attr = get_key_attribute(rules->udev, key + strlen("SECLABEL"));
19a8e656
ZJS		 1127 if (attr == NULL)
1128 LOG_AND_RETURN("error parsing %s attribute", "SECLABEL");
1129
1130 if (op == OP_REMOVE)
1131 LOG_AND_RETURN("invalid %s operation", "SECLABEL");
c26547d6
KS		 1132
1133 rule_add_key(&rule_tmp, TK_A_SECLABEL, op, value, attr);
c26547d6 1134
99f16bb8 1135 } else if (streq(key, "KERNELS")) {
19a8e656
ZJS		 1136 if (op > OP_MATCH_MAX)
1137 LOG_AND_RETURN("invalid %s operation", key);
1138
912541b0 1139 rule_add_key(&rule_tmp, TK_M_KERNELS, op, value, NULL);
912541b0 1140
99f16bb8 1141 } else if (streq(key, "SUBSYSTEMS")) {
19a8e656
ZJS		 1142 if (op > OP_MATCH_MAX)
1143 LOG_AND_RETURN("invalid %s operation", key);
1144
912541b0 1145 rule_add_key(&rule_tmp, TK_M_SUBSYSTEMS, op, value, NULL);
912541b0 1146
99f16bb8 1147 } else if (streq(key, "DRIVERS")) {
19a8e656
ZJS		 1148 if (op > OP_MATCH_MAX)
1149 LOG_AND_RETURN("invalid %s operation", key);
1150
912541b0 1151 rule_add_key(&rule_tmp, TK_M_DRIVERS, op, value, NULL);
912541b0 1152
99f16bb8 1153 } else if (startswith(key, "ATTRS{")) {
19a8e656
ZJS		 1154 if (op > OP_MATCH_MAX)
1155 LOG_AND_RETURN("invalid %s operation", "ATTRS");
1156
f8294e41 1157 attr = get_key_attribute(rules->udev, key + strlen("ATTRS"));
19a8e656
ZJS		 1158 if (attr == NULL)
1159 LOG_AND_RETURN("error parsing %s attribute", "ATTRS");
1160
33502ffe 1161 if (startswith(attr, "device/"))
19a8e656
ZJS		 1162 LOG_RULE_WARNING("'device' link may not be available in future kernels; please fix");
1163 if (strstr(attr, "../") != NULL)
1164 LOG_RULE_WARNING("direct reference to parent sysfs directory, may break in future kernels; please fix");
912541b0 1165 rule_add_key(&rule_tmp, TK_M_ATTRS, op, value, attr);
912541b0 1166
99f16bb8 1167 } else if (streq(key, "TAGS")) {
19a8e656
ZJS		 1168 if (op > OP_MATCH_MAX)
1169 LOG_AND_RETURN("invalid %s operation", key);
1170
912541b0 1171 rule_add_key(&rule_tmp, TK_M_TAGS, op, value, NULL);
912541b0 1172
99f16bb8 1173 } else if (startswith(key, "ENV{")) {
f8294e41 1174 attr = get_key_attribute(rules->udev, key + strlen("ENV"));
19a8e656
ZJS		 1175 if (attr == NULL)
1176 LOG_AND_RETURN("error parsing %s attribute", "ENV");
1177
1178 if (op == OP_REMOVE)
1179 LOG_AND_RETURN("invalid %s operation", "ENV");
1180
1181 if (op < OP_MATCH_MAX)
1182 rule_add_key(&rule_tmp, TK_M_ENV, op, value, attr);
1183 else {
99f16bb8
ZJS		 1184 if (STR_IN_SET(attr,
1185 "ACTION",
1186 "SUBSYSTEM",
1187 "DEVTYPE",
1188 "MAJOR",
1189 "MINOR",
1190 "DRIVER",
1191 "IFINDEX",
1192 "DEVNAME",
1193 "DEVLINKS",
1194 "DEVPATH",
19a8e656
ZJS		 1195 "TAGS"))
1196 LOG_AND_RETURN("invalid ENV attribute, '%s' cannot be set", attr);
1197
1198 rule_add_key(&rule_tmp, TK_A_ENV, op, value, attr);
912541b0 1199 }
912541b0 1200
99f16bb8 1201 } else if (streq(key, "TAG")) {
912541b0
KS		 1202 if (op < OP_MATCH_MAX)
1203 rule_add_key(&rule_tmp, TK_M_TAG, op, value, NULL);
1204 else
1205 rule_add_key(&rule_tmp, TK_A_TAG, op, value, NULL);
912541b0 1206
99f16bb8 1207 } else if (streq(key, "PROGRAM")) {
19a8e656
ZJS		 1208 if (op == OP_REMOVE)
1209 LOG_AND_RETURN("invalid %s operation", key);
1210
912541b0 1211 rule_add_key(&rule_tmp, TK_M_PROGRAM, op, value, NULL);
912541b0 1212
99f16bb8 1213 } else if (streq(key, "RESULT")) {
19a8e656
ZJS		 1214 if (op > OP_MATCH_MAX)
1215 LOG_AND_RETURN("invalid %s operation", key);
1216
912541b0 1217 rule_add_key(&rule_tmp, TK_M_RESULT, op, value, NULL);
912541b0 1218
99f16bb8 1219 } else if (startswith(key, "IMPORT")) {
f8294e41 1220 attr = get_key_attribute(rules->udev, key + strlen("IMPORT"));
912541b0 1221 if (attr == NULL) {
19a8e656 1222 LOG_RULE_WARNING("ignoring IMPORT{} with missing type");
912541b0
KS		 1223 continue;
1224 }
19a8e656
ZJS		 1225 if (op == OP_REMOVE)
1226 LOG_AND_RETURN("invalid %s operation", "IMPORT");
1227
33502ffe 1228 if (streq(attr, "program")) {
912541b0
KS		 1229 /* find known built-in command */
1230 if (value[0] != '/') {
19a8e656 1231 const enum udev_builtin_cmd cmd = udev_builtin_lookup(value);
912541b0 1232
912541b0 1233 if (cmd < UDEV_BUILTIN_MAX) {
19a8e656 1234 LOG_RULE_DEBUG("IMPORT found builtin '%s', replacing", value);
912541b0
KS		 1235 rule_add_key(&rule_tmp, TK_M_IMPORT_BUILTIN, op, value, &cmd);
1236 continue;
1237 }
1238 }
912541b0 1239 rule_add_key(&rule_tmp, TK_M_IMPORT_PROG, op, value, NULL);
33502ffe 1240 } else if (streq(attr, "builtin")) {
19a8e656 1241 const enum udev_builtin_cmd cmd = udev_builtin_lookup(value);
912541b0 1242
19a8e656
ZJS		 1243 if (cmd >= UDEV_BUILTIN_MAX)
1244 LOG_RULE_WARNING("IMPORT{builtin} '%s' unknown", value);
912541b0 1245 else
19a8e656
ZJS		 1246 rule_add_key(&rule_tmp, TK_M_IMPORT_BUILTIN, op, value, &cmd);
1247 } else if (streq(attr, "file"))
912541b0 1248 rule_add_key(&rule_tmp, TK_M_IMPORT_FILE, op, value, NULL);
19a8e656 1249 else if (streq(attr, "db"))
912541b0 1250 rule_add_key(&rule_tmp, TK_M_IMPORT_DB, op, value, NULL);
19a8e656 1251 else if (streq(attr, "cmdline"))
912541b0 1252 rule_add_key(&rule_tmp, TK_M_IMPORT_CMDLINE, op, value, NULL);
19a8e656 1253 else if (streq(attr, "parent"))
912541b0 1254 rule_add_key(&rule_tmp, TK_M_IMPORT_PARENT, op, value, NULL);
19a8e656
ZJS		 1255 else
1256 LOG_RULE_ERROR("ignoring unknown %s{} type '%s'", "IMPORT", attr);
912541b0 1257
99f16bb8 1258 } else if (startswith(key, "TEST")) {
912541b0
KS		 1259 mode_t mode = 0;
1260
19a8e656
ZJS		 1261 if (op > OP_MATCH_MAX)
1262 LOG_AND_RETURN("invalid %s operation", "TEST");
1263
f8294e41 1264 attr = get_key_attribute(rules->udev, key + strlen("TEST"));
912541b0
KS		 1265 if (attr != NULL) {
1266 mode = strtol(attr, NULL, 8);
1267 rule_add_key(&rule_tmp, TK_M_TEST, op, value, &mode);
99f16bb8 1268 } else
912541b0 1269 rule_add_key(&rule_tmp, TK_M_TEST, op, value, NULL);
912541b0 1270
99f16bb8 1271 } else if (startswith(key, "RUN")) {
f8294e41 1272 attr = get_key_attribute(rules->udev, key + strlen("RUN"));
83cd6b75
KS		 1273 if (attr == NULL)
1274 attr = "program";
19a8e656
ZJS		 1275 if (op == OP_REMOVE)
1276 LOG_AND_RETURN("invalid %s operation", "RUN");
83cd6b75 1277
33502ffe 1278 if (streq(attr, "builtin")) {
19a8e656 1279 const enum udev_builtin_cmd cmd = udev_builtin_lookup(value);
83cd6b75
KS		 1280
1281 if (cmd < UDEV_BUILTIN_MAX)
1282 rule_add_key(&rule_tmp, TK_A_RUN_BUILTIN, op, value, &cmd);
1283 else
19a8e656 1284 LOG_RULE_ERROR("RUN{builtin}: '%s' unknown", value);
33502ffe 1285 } else if (streq(attr, "program")) {
99f16bb8 1286 const enum udev_builtin_cmd cmd = UDEV_BUILTIN_MAX;
83cd6b75 1287
83cd6b75 1288 rule_add_key(&rule_tmp, TK_A_RUN_PROGRAM, op, value, &cmd);
99f16bb8 1289 } else
19a8e656 1290 LOG_RULE_ERROR("ignoring unknown %s{} type '%s'", "RUN", attr);
912541b0 1291
99f16bb8 1292 } else if (streq(key, "LABEL")) {
19a8e656
ZJS		 1293 if (op == OP_REMOVE)
1294 LOG_AND_RETURN("invalid %s operation", key);
1295
915bf0f6 1296 rule_tmp.rule.rule.label_off = rules_add_string(rules, value);
912541b0 1297
99f16bb8 1298 } else if (streq(key, "GOTO")) {
19a8e656
ZJS		 1299 if (op == OP_REMOVE)
1300 LOG_AND_RETURN("invalid %s operation", key);
1301
912541b0 1302 rule_add_key(&rule_tmp, TK_A_GOTO, 0, value, NULL);
912541b0 1303
99f16bb8 1304 } else if (startswith(key, "NAME")) {
19a8e656
ZJS		 1305 if (op == OP_REMOVE)
1306 LOG_AND_RETURN("invalid %s operation", key);
1307
1308 if (op < OP_MATCH_MAX)
912541b0 1309 rule_add_key(&rule_tmp, TK_M_NAME, op, value, NULL);
19a8e656 1310 else {
33502ffe 1311 if (streq(value, "%k")) {
19a8e656 1312 LOG_RULE_WARNING("NAME=\"%%k\" is ignored, because it breaks kernel supplied names; please remove");
912541b0
KS		 1313 continue;
1314 }
19a8e656
ZJS		 1315 if (isempty(value)) {
1316 LOG_RULE_DEBUG("NAME=\"\" is ignored, because udev will not delete any device nodes; please remove");
912541b0
KS		 1317 continue;
1318 }
1319 rule_add_key(&rule_tmp, TK_A_NAME, op, value, NULL);
1320 }
1321 rule_tmp.rule.rule.can_set_name = true;
912541b0 1322
99f16bb8 1323 } else if (streq(key, "SYMLINK")) {
19a8e656
ZJS		 1324 if (op == OP_REMOVE)
1325 LOG_AND_RETURN("invalid %s operation", key);
1326
8a173387 1327 if (op < OP_MATCH_MAX)
912541b0 1328 rule_add_key(&rule_tmp, TK_M_DEVLINK, op, value, NULL);
8a173387
KS		 1329 else
1330 rule_add_key(&rule_tmp, TK_A_DEVLINK, op, value, NULL);
912541b0 1331 rule_tmp.rule.rule.can_set_name = true;
912541b0 1332
99f16bb8 1333 } else if (streq(key, "OWNER")) {
912541b0
KS		 1334 uid_t uid;
1335 char *endptr;
1336
19a8e656
ZJS		 1337 if (op == OP_REMOVE)
1338 LOG_AND_RETURN("invalid %s operation", key);
8e3ba377 1339
912541b0 1340 uid = strtoul(value, &endptr, 10);
19a8e656 1341 if (endptr[0] == '\0')
912541b0 1342 rule_add_key(&rule_tmp, TK_A_OWNER_ID, op, NULL, &uid);
19a8e656 1343 else if (rules->resolve_names > 0 && strchr("$%", value[0]) == NULL) {
912541b0
KS		 1344 uid = add_uid(rules, value);
1345 rule_add_key(&rule_tmp, TK_A_OWNER_ID, op, NULL, &uid);
1f6b4113 1346 } else if (rules->resolve_names >= 0)
912541b0 1347 rule_add_key(&rule_tmp, TK_A_OWNER, op, value, NULL);
1f6b4113 1348
912541b0 1349 rule_tmp.rule.rule.can_set_name = true;
912541b0 1350
99f16bb8 1351 } else if (streq(key, "GROUP")) {
912541b0
KS		 1352 gid_t gid;
1353 char *endptr;
1354
19a8e656
ZJS		 1355 if (op == OP_REMOVE)
1356 LOG_AND_RETURN("invalid %s operation", key);
8e3ba377 1357
912541b0 1358 gid = strtoul(value, &endptr, 10);
19a8e656 1359 if (endptr[0] == '\0')
912541b0 1360 rule_add_key(&rule_tmp, TK_A_GROUP_ID, op, NULL, &gid);
19a8e656 1361 else if ((rules->resolve_names > 0) && strchr("$%", value[0]) == NULL) {
912541b0
KS		 1362 gid = add_gid(rules, value);
1363 rule_add_key(&rule_tmp, TK_A_GROUP_ID, op, NULL, &gid);
1f6b4113 1364 } else if (rules->resolve_names >= 0)
912541b0 1365 rule_add_key(&rule_tmp, TK_A_GROUP, op, value, NULL);
1f6b4113 1366
912541b0 1367 rule_tmp.rule.rule.can_set_name = true;
912541b0 1368
99f16bb8 1369 } else if (streq(key, "MODE")) {
912541b0
KS		 1370 mode_t mode;
1371 char *endptr;
1372
19a8e656
ZJS		 1373 if (op == OP_REMOVE)
1374 LOG_AND_RETURN("invalid %s operation", key);
8e3ba377 1375
912541b0
KS		 1376 mode = strtol(value, &endptr, 8);
1377 if (endptr[0] == '\0')
1378 rule_add_key(&rule_tmp, TK_A_MODE_ID, op, NULL, &mode);
1379 else
1380 rule_add_key(&rule_tmp, TK_A_MODE, op, value, NULL);
1381 rule_tmp.rule.rule.can_set_name = true;
912541b0 1382
99f16bb8 1383 } else if (streq(key, "OPTIONS")) {
912541b0
KS		 1384 const char *pos;
1385
19a8e656
ZJS		 1386 if (op == OP_REMOVE)
1387 LOG_AND_RETURN("invalid %s operation", key);
8e3ba377 1388
912541b0
KS		 1389 pos = strstr(value, "link_priority=");
1390 if (pos != NULL) {
19a8e656 1391 int prio = atoi(pos + strlen("link_priority="));
912541b0
KS		 1392
1393 rule_add_key(&rule_tmp, TK_A_DEVLINK_PRIO, op, NULL, &prio);
912541b0
KS		 1394 }
1395
9f20a8a3 1396 pos = strstr(value, "string_escape=");
912541b0 1397 if (pos != NULL) {
19a8e656 1398 pos += strlen("string_escape=");
33502ffe 1399 if (startswith(pos, "none"))
912541b0 1400 rule_add_key(&rule_tmp, TK_A_STRING_ESCAPE_NONE, op, NULL, NULL);
33502ffe 1401 else if (startswith(pos, "replace"))
912541b0
KS		 1402 rule_add_key(&rule_tmp, TK_A_STRING_ESCAPE_REPLACE, op, NULL, NULL);
1403 }
1404
1405 pos = strstr(value, "db_persist");
1406 if (pos != NULL)
1407 rule_add_key(&rule_tmp, TK_A_DB_PERSIST, op, NULL, NULL);
1408
1409 pos = strstr(value, "nowatch");
1410 if (pos != NULL) {
1411 const int off = 0;
1412
1413 rule_add_key(&rule_tmp, TK_A_INOTIFY_WATCH, op, NULL, &off);
912541b0
KS		 1414 } else {
1415 pos = strstr(value, "watch");
1416 if (pos != NULL) {
1417 const int on = 1;
1418
1419 rule_add_key(&rule_tmp, TK_A_INOTIFY_WATCH, op, NULL, &on);
912541b0
KS		 1420 }
1421 }
1422
1423 pos = strstr(value, "static_node=");
1424 if (pos != NULL) {
19a8e656
ZJS		 1425 pos += strlen("static_node=");
1426 rule_add_key(&rule_tmp, TK_A_STATIC_NODE, op, pos, NULL);
912541b0
KS		 1427 rule_tmp.rule.rule.has_static_node = true;
1428 }
1429
19a8e656
ZJS		 1430 } else
1431 LOG_AND_RETURN("unknown key '%s'", key);
912541b0
KS		 1432 }
1433
19a8e656 1434 /* add rule token and sort tokens */
912541b0 1435 rule_tmp.rule.rule.token_count = 1 + rule_tmp.token_cur;
19a8e656
ZJS		 1436 if (add_token(rules, &rule_tmp.rule) != 0 || sort_token(rules, &rule_tmp) != 0)
1437 LOG_RULE_ERROR("failed to add rule token");
c7521974
KS		 1438}
1439
9ec6e95b 1440static int parse_file(struct udev_rules *rules, const char *filename) {
6c8aaf0c 1441 _cleanup_fclose_ FILE *f = NULL;
912541b0 1442 unsigned int first_token;
775f8b3c 1443 unsigned int filename_off;
912541b0
KS		 1444 char line[UTIL_LINE_SIZE];
1445 int line_nr = 0;
1446 unsigned int i;
1447
ed88bcfb
ZJS		 1448 f = fopen(filename, "re");
1449 if (!f) {
1450 if (errno == ENOENT)
1451 return 0;
1452 else
1453 return -errno;
775f8b3c 1454 }
912541b0 1455
ed88bcfb
ZJS		 1456 if (null_or_empty_fd(fileno(f))) {
1457 log_debug("Skipping empty file: %s", filename);
1458 return 0;
1459 } else
1460 log_debug("Reading rules file: %s", filename);
912541b0
KS		 1461
1462 first_token = rules->token_cur;
915bf0f6 1463 filename_off = rules_add_string(rules, filename);
912541b0
KS		 1464
1465 while (fgets(line, sizeof(line), f) != NULL) {
1466 char *key;
1467 size_t len;
1468
1469 /* skip whitespace */
1470 line_nr++;
1471 key = line;
1472 while (isspace(key[0]))
1473 key++;
1474
1475 /* comment */
1476 if (key[0] == '#')
1477 continue;
1478
1479 len = strlen(line);
1480 if (len < 3)
1481 continue;
1482
1483 /* continue reading if backslash+newline is found */
1484 while (line[len-2] == '\\') {
1485 if (fgets(&line[len-2], (sizeof(line)-len)+2, f) == NULL)
1486 break;
1487 if (strlen(&line[len-2]) < 2)
1488 break;
1489 line_nr++;
1490 len = strlen(line);
1491 }
1492
1493 if (len+1 >= sizeof(line)) {
9f6445e3 1494 log_error("line too long '%s':%u, ignored", filename, line_nr);
912541b0
KS		 1495 continue;
1496 }
1497 add_rule(rules, key, filename, filename_off, line_nr);
1498 }
912541b0
KS		 1499
1500 /* link GOTOs to LABEL rules in this file to be able to fast-forward */
1501 for (i = first_token+1; i < rules->token_cur; i++) {
1502 if (rules->tokens[i].type == TK_A_GOTO) {
915bf0f6 1503 char *label = rules_str(rules, rules->tokens[i].key.value_off);
912541b0
KS		 1504 unsigned int j;
1505
1506 for (j = i+1; j < rules->token_cur; j++) {
1507 if (rules->tokens[j].type != TK_RULE)
1508 continue;
1509 if (rules->tokens[j].rule.label_off == 0)
1510 continue;
915bf0f6 1511 if (!streq(label, rules_str(rules, rules->tokens[j].rule.label_off)))
912541b0
KS		 1512 continue;
1513 rules->tokens[i].key.rule_goto = j;
1514 break;
1515 }
1516 if (rules->tokens[i].key.rule_goto == 0)
9f6445e3 1517 log_error("GOTO '%s' has no matching label in: '%s'", label, filename);
912541b0
KS		 1518 }
1519 }
1520 return 0;
c7521974
KS		 1521}
1522
9ec6e95b 1523struct udev_rules *udev_rules_new(struct udev *udev, int resolve_names) {
912541b0
KS		 1524 struct udev_rules *rules;
1525 struct udev_list file_list;
912541b0 1526 struct token end_token;
775f8b3c
KS		 1527 char **files, **f;
1528 int r;
912541b0 1529
955d98c9 1530 rules = new0(struct udev_rules, 1);
912541b0
KS		 1531 if (rules == NULL)
1532 return NULL;
1533 rules->udev = udev;
1534 rules->resolve_names = resolve_names;
1535 udev_list_init(udev, &file_list, true);
1536
1537 /* init token array and string buffer */
1538 rules->tokens = malloc(PREALLOC_TOKEN * sizeof(struct token));
0820a4f0
VP		 1539 if (rules->tokens == NULL)
1540 return udev_rules_unref(rules);
912541b0
KS		 1541 rules->token_max = PREALLOC_TOKEN;
1542
915bf0f6
KS		 1543 rules->strbuf = strbuf_new();
1544 if (!rules->strbuf)
0820a4f0
VP		 1545 return udev_rules_unref(rules);
1546
3b8c1cb0
KS		 1547 udev_rules_check_timestamp(rules);
1548
b5084605 1549 r = conf_files_list_strv(&files, ".rules", NULL, 0, rules_dirs);
775f8b3c 1550 if (r < 0) {
da927ba9 1551 log_error_errno(r, "failed to enumerate rules files: %m");
0820a4f0 1552 return udev_rules_unref(rules);
912541b0
KS		 1553 }
1554
775f8b3c
KS		 1555 /*
1556 * The offset value in the rules strct is limited; add all
1557 * rules file names to the beginning of the string buffer.
1558 */
1559 STRV_FOREACH(f, files)
915bf0f6 1560 rules_add_string(rules, *f);
912541b0 1561
775f8b3c
KS		 1562 STRV_FOREACH(f, files)
1563 parse_file(rules, *f);
1564
1565 strv_free(files);
912541b0 1566
29804cc1 1567 memzero(&end_token, sizeof(struct token));
912541b0
KS		 1568 end_token.type = TK_END;
1569 add_token(rules, &end_token);
9f6445e3 1570 log_debug("rules contain %zu bytes tokens (%u * %zu bytes), %zu bytes strings",
915bf0f6 1571 rules->token_max * sizeof(struct token), rules->token_max, sizeof(struct token), rules->strbuf->len);
912541b0 1572
915bf0f6 1573 /* cleanup temporary strbuf data */
9f6445e3 1574 log_debug("%zu strings (%zu bytes), %zu de-duplicated (%zu bytes), %zu trie nodes used",
915bf0f6
KS		 1575 rules->strbuf->in_count, rules->strbuf->in_len,
1576 rules->strbuf->dedup_count, rules->strbuf->dedup_len, rules->strbuf->nodes_count);
1577 strbuf_complete(rules->strbuf);
912541b0
KS		 1578
1579 /* cleanup uid/gid cache */
a1e58e8e 1580 rules->uids = mfree(rules->uids);
912541b0
KS		 1581 rules->uids_cur = 0;
1582 rules->uids_max = 0;
a1e58e8e 1583 rules->gids = mfree(rules->gids);
912541b0
KS		 1584 rules->gids_cur = 0;
1585 rules->gids_max = 0;
1586
1587 dump_rules(rules);
1588 return rules;
c7521974
KS		 1589}
1590
9ec6e95b 1591struct udev_rules *udev_rules_unref(struct udev_rules *rules) {
912541b0
KS		 1592 if (rules == NULL)
1593 return NULL;
1594 free(rules->tokens);
915bf0f6 1595 strbuf_cleanup(rules->strbuf);
912541b0
KS		 1596 free(rules->uids);
1597 free(rules->gids);
6b430fdb 1598 return mfree(rules);
c7521974 1599}
6880b25d 1600
9ec6e95b 1601bool udev_rules_check_timestamp(struct udev_rules *rules) {
5c11fbe3
KS		 1602 if (!rules)
1603 return false;
1604
2ad8416d 1605 return paths_check_timestamp(rules_dirs, &rules->dirs_ts_usec, true);
6ada823a
KS		 1606}
1607
9ec6e95b 1608static int match_key(struct udev_rules *rules, struct token *token, const char *val) {
915bf0f6 1609 char *key_value = rules_str(rules, token->key.value_off);
912541b0
KS		 1610 char *pos;
1611 bool match = false;
1612
1613 if (val == NULL)
1614 val = "";
1615
1616 switch (token->key.glob) {
1617 case GL_PLAIN:
33502ffe 1618 match = (streq(key_value, val));
912541b0
KS		 1619 break;
1620 case GL_GLOB:
1621 match = (fnmatch(key_value, val, 0) == 0);
1622 break;
1623 case GL_SPLIT:
1624 {
33502ffe 1625 const char *s;
912541b0
KS		 1626 size_t len;
1627
915bf0f6 1628 s = rules_str(rules, token->key.value_off);
912541b0
KS		 1629 len = strlen(val);
1630 for (;;) {
1631 const char *next;
1632
33502ffe 1633 next = strchr(s, '|');
912541b0 1634 if (next != NULL) {
33502ffe 1635 size_t matchlen = (size_t)(next - s);
912541b0 1636
641906e9 1637 match = (matchlen == len && strneq(s, val, matchlen));
912541b0
KS		 1638 if (match)
1639 break;
1640 } else {
33502ffe 1641 match = (streq(s, val));
912541b0
KS		 1642 break;
1643 }
33502ffe 1644 s = &next[1];
912541b0
KS		 1645 }
1646 break;
1647 }
1648 case GL_SPLIT_GLOB:
1649 {
1650 char value[UTIL_PATH_SIZE];
1651
d5a89d7d 1652 strscpy(value, sizeof(value), rules_str(rules, token->key.value_off));
912541b0
KS		 1653 key_value = value;
1654 while (key_value != NULL) {
1655 pos = strchr(key_value, '|');
1656 if (pos != NULL) {
1657 pos[0] = '\0';
1658 pos = &pos[1];
1659 }
912541b0
KS		 1660 match = (fnmatch(key_value, val, 0) == 0);
1661 if (match)
1662 break;
1663 key_value = pos;
1664 }
1665 break;
1666 }
1667 case GL_SOMETHING:
1668 match = (val[0] != '\0');
1669 break;
1670 case GL_UNSET:
1671 return -1;
1672 }
1673
baa30fbc 1674 if (match && (token->key.op == OP_MATCH))
912541b0 1675 return 0;
baa30fbc 1676 if (!match && (token->key.op == OP_NOMATCH))
912541b0 1677 return 0;
912541b0 1678 return -1;
6880b25d
KS		 1679}
1680
9ec6e95b 1681static int match_attr(struct udev_rules *rules, struct udev_device *dev, struct udev_event *event, struct token *cur) {
912541b0
KS		 1682 const char *name;
1683 char nbuf[UTIL_NAME_SIZE];
1684 const char *value;
1685 char vbuf[UTIL_NAME_SIZE];
1686 size_t len;
1687
915bf0f6 1688 name = rules_str(rules, cur->key.attr_off);
912541b0
KS		 1689 switch (cur->key.attrsubst) {
1690 case SB_FORMAT:
e20a9171 1691 udev_event_apply_format(event, name, nbuf, sizeof(nbuf), false);
912541b0
KS		 1692 name = nbuf;
1693 /* fall through */
1694 case SB_NONE:
1695 value = udev_device_get_sysattr_value(dev, name);
1696 if (value == NULL)
1697 return -1;
1698 break;
1699 case SB_SUBSYS:
1700 if (util_resolve_subsys_kernel(event->udev, name, vbuf, sizeof(vbuf), 1) != 0)
1701 return -1;
1702 value = vbuf;
1703 break;
1704 default:
1705 return -1;
1706 }
1707
1708 /* remove trailing whitespace, if not asked to match for it */
1709 len = strlen(value);
1710 if (len > 0 && isspace(value[len-1])) {
1711 const char *key_value;
1712 size_t klen;
1713
915bf0f6 1714 key_value = rules_str(rules, cur->key.value_off);
912541b0
KS		 1715 klen = strlen(key_value);
1716 if (klen > 0 && !isspace(key_value[klen-1])) {
1717 if (value != vbuf) {
d5a89d7d 1718 strscpy(vbuf, sizeof(vbuf), value);
912541b0
KS		 1719 value = vbuf;
1720 }
1721 while (len > 0 && isspace(vbuf[--len]))
1722 vbuf[len] = '\0';
912541b0
KS		 1723 }
1724 }
1725
1726 return match_key(rules, cur, value);
6880b25d
KS		 1727}
1728
1729enum escape_type {
912541b0
KS		 1730 ESCAPE_UNSET,
1731 ESCAPE_NONE,
1732 ESCAPE_REPLACE,
6880b25d
KS		 1733};
1734
4fd6af76
ZJS		 1735void udev_rules_apply_to_event(struct udev_rules *rules,
1736 struct udev_event *event,
1737 usec_t timeout_usec,
1738 usec_t timeout_warn_usec,
1739 struct udev_list *properties_list) {
912541b0
KS		 1740 struct token *cur;
1741 struct token *rule;
1742 enum escape_type esc = ESCAPE_UNSET;
1743 bool can_set_name;
88b013b2 1744 int r;
912541b0
KS		 1745
1746 if (rules->tokens == NULL)
4fd6af76 1747 return;
912541b0 1748
33502ffe 1749 can_set_name = ((!streq(udev_device_get_action(event->dev), "remove")) &&
912541b0
KS		 1750 (major(udev_device_get_devnum(event->dev)) > 0 ||
1751 udev_device_get_ifindex(event->dev) > 0));
1752
1753 /* loop through token list, match, run actions or forward to next rule */
1754 cur = &rules->tokens[0];
1755 rule = cur;
1756 for (;;) {
1757 dump_token(rules, cur);
1758 switch (cur->type) {
1759 case TK_RULE:
1760 /* current rule */
1761 rule = cur;
1762 /* possibly skip rules which want to set NAME, SYMLINK, OWNER, GROUP, MODE */
1763 if (!can_set_name && rule->rule.can_set_name)
1764 goto nomatch;
1765 esc = ESCAPE_UNSET;
1766 break;
1767 case TK_M_ACTION:
1768 if (match_key(rules, cur, udev_device_get_action(event->dev)) != 0)
1769 goto nomatch;
1770 break;
1771 case TK_M_DEVPATH:
1772 if (match_key(rules, cur, udev_device_get_devpath(event->dev)) != 0)
1773 goto nomatch;
1774 break;
1775 case TK_M_KERNEL:
1776 if (match_key(rules, cur, udev_device_get_sysname(event->dev)) != 0)
1777 goto nomatch;
1778 break;
1779 case TK_M_DEVLINK: {
912541b0
KS		 1780 struct udev_list_entry *list_entry;
1781 bool match = false;
1782
1783 udev_list_entry_foreach(list_entry, udev_device_get_devlinks_list_entry(event->dev)) {
1784 const char *devlink;
1785
920b52e4 1786 devlink = udev_list_entry_get_name(list_entry) + strlen("/dev/");
912541b0
KS		 1787 if (match_key(rules, cur, devlink) == 0) {
1788 match = true;
1789 break;
1790 }
1791 }
1792 if (!match)
1793 goto nomatch;
1794 break;
1795 }
1796 case TK_M_NAME:
1797 if (match_key(rules, cur, event->name) != 0)
1798 goto nomatch;
1799 break;
1800 case TK_M_ENV: {
915bf0f6 1801 const char *key_name = rules_str(rules, cur->key.attr_off);
912541b0
KS		 1802 const char *value;
1803
1804 value = udev_device_get_property_value(event->dev, key_name);
adeba500
KS		 1805
1806 /* check global properties */
1807 if (!value && properties_list) {
1808 struct udev_list_entry *list_entry;
1809
1810 list_entry = udev_list_get_entry(properties_list);
1811 list_entry = udev_list_entry_get_by_name(list_entry, key_name);
1812 if (list_entry != NULL)
1813 value = udev_list_entry_get_value(list_entry);
1814 }
1815
1816 if (!value)
912541b0 1817 value = "";
912541b0
KS		 1818 if (match_key(rules, cur, value))
1819 goto nomatch;
1820 break;
1821 }
1822 case TK_M_TAG: {
1823 struct udev_list_entry *list_entry;
1824 bool match = false;
1825
1826 udev_list_entry_foreach(list_entry, udev_device_get_tags_list_entry(event->dev)) {
915bf0f6 1827 if (streq(rules_str(rules, cur->key.value_off), udev_list_entry_get_name(list_entry))) {
912541b0
KS		 1828 match = true;
1829 break;
1830 }
1831 }
4302857b
FF		 1832 if ((!match && (cur->key.op != OP_NOMATCH)) ||
1833 (match && (cur->key.op == OP_NOMATCH)))
912541b0
KS		 1834 goto nomatch;
1835 break;
1836 }
1837 case TK_M_SUBSYSTEM:
1838 if (match_key(rules, cur, udev_device_get_subsystem(event->dev)) != 0)
1839 goto nomatch;
1840 break;
1841 case TK_M_DRIVER:
1842 if (match_key(rules, cur, udev_device_get_driver(event->dev)) != 0)
1843 goto nomatch;
1844 break;
912541b0
KS		 1845 case TK_M_ATTR:
1846 if (match_attr(rules, event->dev, event, cur) != 0)
1847 goto nomatch;
1848 break;
f4cf2e5b
KS		 1849 case TK_M_SYSCTL: {
1850 char filename[UTIL_PATH_SIZE];
1851 _cleanup_free_ char *value = NULL;
1852 size_t len;
1853
e20a9171 1854 udev_event_apply_format(event, rules_str(rules, cur->key.attr_off), filename, sizeof(filename), false);
f4cf2e5b
KS		 1855 sysctl_normalize(filename);
1856 if (sysctl_read(filename, &value) < 0)
1857 goto nomatch;
1858
1859 len = strlen(value);
1860 while (len > 0 && isspace(value[--len]))
1861 value[len] = '\0';
1862 if (match_key(rules, cur, value) != 0)
1863 goto nomatch;
1864 break;
1865 }
912541b0
KS		 1866 case TK_M_KERNELS:
1867 case TK_M_SUBSYSTEMS:
1868 case TK_M_DRIVERS:
1869 case TK_M_ATTRS:
1870 case TK_M_TAGS: {
1871 struct token *next;
1872
1873 /* get whole sequence of parent matches */
1874 next = cur;
1875 while (next->type > TK_M_PARENTS_MIN && next->type < TK_M_PARENTS_MAX)
1876 next++;
1877
1878 /* loop over parents */
1879 event->dev_parent = event->dev;
1880 for (;;) {
1881 struct token *key;
1882
912541b0
KS		 1883 /* loop over sequence of parent match keys */
1884 for (key = cur; key < next; key++ ) {
1885 dump_token(rules, key);
1886 switch(key->type) {
1887 case TK_M_KERNELS:
1888 if (match_key(rules, key, udev_device_get_sysname(event->dev_parent)) != 0)
1889 goto try_parent;
1890 break;
1891 case TK_M_SUBSYSTEMS:
1892 if (match_key(rules, key, udev_device_get_subsystem(event->dev_parent)) != 0)
1893 goto try_parent;
1894 break;
1895 case TK_M_DRIVERS:
1896 if (match_key(rules, key, udev_device_get_driver(event->dev_parent)) != 0)
1897 goto try_parent;
1898 break;
1899 case TK_M_ATTRS:
1900 if (match_attr(rules, event->dev_parent, event, key) != 0)
1901 goto try_parent;
1902 break;
1903 case TK_M_TAGS: {
915bf0f6 1904 bool match = udev_device_has_tag(event->dev_parent, rules_str(rules, cur->key.value_off));
912541b0
KS		 1905
1906 if (match && key->key.op == OP_NOMATCH)
1907 goto try_parent;
1908 if (!match && key->key.op == OP_MATCH)
1909 goto try_parent;
1910 break;
1911 }
1912 default:
1913 goto nomatch;
1914 }
912541b0 1915 }
912541b0
KS		 1916 break;
1917
1918 try_parent:
1919 event->dev_parent = udev_device_get_parent(event->dev_parent);
1920 if (event->dev_parent == NULL)
1921 goto nomatch;
1922 }
1923 /* move behind our sequence of parent match keys */
1924 cur = next;
1925 continue;
1926 }
1927 case TK_M_TEST: {
1928 char filename[UTIL_PATH_SIZE];
1929 struct stat statbuf;
1930 int match;
1931
e20a9171 1932 udev_event_apply_format(event, rules_str(rules, cur->key.value_off), filename, sizeof(filename), false);
912541b0
KS		 1933 if (util_resolve_subsys_kernel(event->udev, filename, filename, sizeof(filename), 0) != 0) {
1934 if (filename[0] != '/') {
1935 char tmp[UTIL_PATH_SIZE];
1936
d5a89d7d
KS		 1937 strscpy(tmp, sizeof(tmp), filename);
1938 strscpyl(filename, sizeof(filename),
912541b0
KS		 1939 udev_device_get_syspath(event->dev), "/", tmp, NULL);
1940 }
1941 }
1942 attr_subst_subdir(filename, sizeof(filename));
1943
1944 match = (stat(filename, &statbuf) == 0);
baa30fbc 1945 if (match && cur->key.mode > 0)
912541b0 1946 match = ((statbuf.st_mode & cur->key.mode) > 0);
912541b0
KS		 1947 if (match && cur->key.op == OP_NOMATCH)
1948 goto nomatch;
1949 if (!match && cur->key.op == OP_MATCH)
1950 goto nomatch;
1951 break;
1952 }
912541b0
KS		 1953 case TK_M_PROGRAM: {
1954 char program[UTIL_PATH_SIZE];
209b031e 1955 char result[UTIL_LINE_SIZE];
912541b0 1956
a1e58e8e 1957 event->program_result = mfree(event->program_result);
e20a9171 1958 udev_event_apply_format(event, rules_str(rules, cur->key.value_off), program, sizeof(program), false);
9f6445e3 1959 log_debug("PROGRAM '%s' %s:%u",
baa30fbc 1960 program,
915bf0f6 1961 rules_str(rules, rule->rule.filename_off),
baa30fbc 1962 rule->rule.filename_line);
912541b0 1963
bbf35206 1964 if (udev_event_spawn(event, timeout_usec, timeout_warn_usec, true, program, result, sizeof(result)) < 0) {
912541b0
KS		 1965 if (cur->key.op != OP_NOMATCH)
1966 goto nomatch;
1967 } else {
1968 int count;
1969
1970 util_remove_trailing_chars(result, '\n');
4c701096 1971 if (IN_SET(esc, ESCAPE_UNSET, ESCAPE_REPLACE)) {
912541b0
KS		 1972 count = util_replace_chars(result, UDEV_ALLOWED_CHARS_INPUT);
1973 if (count > 0)
9f6445e3 1974 log_debug("%i character(s) replaced" , count);
912541b0
KS		 1975 }
1976 event->program_result = strdup(result);
912541b0
KS		 1977 if (cur->key.op == OP_NOMATCH)
1978 goto nomatch;
1979 }
1980 break;
1981 }
1982 case TK_M_IMPORT_FILE: {
1983 char import[UTIL_PATH_SIZE];
1984
e20a9171 1985 udev_event_apply_format(event, rules_str(rules, cur->key.value_off), import, sizeof(import), false);
912541b0
KS		 1986 if (import_file_into_properties(event->dev, import) != 0)
1987 if (cur->key.op != OP_NOMATCH)
1988 goto nomatch;
1989 break;
1990 }
1991 case TK_M_IMPORT_PROG: {
1992 char import[UTIL_PATH_SIZE];
1993
e20a9171 1994 udev_event_apply_format(event, rules_str(rules, cur->key.value_off), import, sizeof(import), false);
9f6445e3 1995 log_debug("IMPORT '%s' %s:%u",
baa30fbc 1996 import,
915bf0f6 1997 rules_str(rules, rule->rule.filename_off),
baa30fbc 1998 rule->rule.filename_line);
912541b0 1999
8314de1d 2000 if (import_program_into_properties(event, timeout_usec, timeout_warn_usec, import) != 0)
912541b0
KS		 2001 if (cur->key.op != OP_NOMATCH)
2002 goto nomatch;
2003 break;
2004 }
2005 case TK_M_IMPORT_BUILTIN: {
2006 char command[UTIL_PATH_SIZE];
2007
2008 if (udev_builtin_run_once(cur->key.builtin_cmd)) {
2009 /* check if we ran already */
2010 if (event->builtin_run & (1 << cur->key.builtin_cmd)) {
9f6445e3 2011 log_debug("IMPORT builtin skip '%s' %s:%u",
baa30fbc 2012 udev_builtin_name(cur->key.builtin_cmd),
915bf0f6 2013 rules_str(rules, rule->rule.filename_off),
baa30fbc 2014 rule->rule.filename_line);
912541b0
KS		 2015 /* return the result from earlier run */
2016 if (event->builtin_ret & (1 << cur->key.builtin_cmd))
7d6884b6 2017 if (cur->key.op != OP_NOMATCH)
912541b0
KS		 2018 goto nomatch;
2019 break;
2020 }
2021 /* mark as ran */
2022 event->builtin_run |= (1 << cur->key.builtin_cmd);
2023 }
2024
e20a9171 2025 udev_event_apply_format(event, rules_str(rules, cur->key.value_off), command, sizeof(command), false);
9f6445e3 2026 log_debug("IMPORT builtin '%s' %s:%u",
baa30fbc 2027 udev_builtin_name(cur->key.builtin_cmd),
915bf0f6 2028 rules_str(rules, rule->rule.filename_off),
baa30fbc 2029 rule->rule.filename_line);
912541b0
KS		 2030
2031 if (udev_builtin_run(event->dev, cur->key.builtin_cmd, command, false) != 0) {
2032 /* remember failure */
9f6445e3 2033 log_debug("IMPORT builtin '%s' returned non-zero",
baa30fbc 2034 udev_builtin_name(cur->key.builtin_cmd));
912541b0
KS		 2035 event->builtin_ret |= (1 << cur->key.builtin_cmd);
2036 if (cur->key.op != OP_NOMATCH)
2037 goto nomatch;
2038 }
2039 break;
2040 }
2041 case TK_M_IMPORT_DB: {
915bf0f6 2042 const char *key = rules_str(rules, cur->key.value_off);
912541b0
KS		 2043 const char *value;
2044
2045 value = udev_device_get_property_value(event->dev_db, key);
df546eb5
TG		 2046 if (value != NULL)
2047 udev_device_add_property(event->dev, key, value);
2048 else {
912541b0
KS		 2049 if (cur->key.op != OP_NOMATCH)
2050 goto nomatch;
2051 }
2052 break;
2053 }
2054 case TK_M_IMPORT_CMDLINE: {
88b013b2 2055 _cleanup_free_ char *value = NULL;
912541b0 2056 bool imported = false;
88b013b2 2057 const char *key;
912541b0 2058
88b013b2
LP		 2059 key = rules_str(rules, cur->key.value_off);
2060
2061 r = proc_cmdline_get_key(key, PROC_CMDLINE_VALUE_OPTIONAL, &value);
2062 if (r < 0)
2063 log_debug_errno(r, "Failed to read %s from /proc/cmdline, ignoring: %m", key);
2064 else if (r > 0) {
2065 imported = true;
2066
2067 if (value)
2068 udev_device_add_property(event->dev, key, value);
2069 else
2070 /* we import simple flags as 'FLAG=1' */
2071 udev_device_add_property(event->dev, key, "1");
912541b0 2072 }
88b013b2 2073
912541b0
KS		 2074 if (!imported && cur->key.op != OP_NOMATCH)
2075 goto nomatch;
2076 break;
2077 }
2078 case TK_M_IMPORT_PARENT: {
2079 char import[UTIL_PATH_SIZE];
2080
e20a9171 2081 udev_event_apply_format(event, rules_str(rules, cur->key.value_off), import, sizeof(import), false);
912541b0
KS		 2082 if (import_parent_into_properties(event->dev, import) != 0)
2083 if (cur->key.op != OP_NOMATCH)
2084 goto nomatch;
2085 break;
2086 }
2087 case TK_M_RESULT:
2088 if (match_key(rules, cur, event->program_result) != 0)
2089 goto nomatch;
2090 break;
2091 case TK_A_STRING_ESCAPE_NONE:
2092 esc = ESCAPE_NONE;
2093 break;
2094 case TK_A_STRING_ESCAPE_REPLACE:
2095 esc = ESCAPE_REPLACE;
2096 break;
2097 case TK_A_DB_PERSIST:
2098 udev_device_set_db_persist(event->dev);
2099 break;
2100 case TK_A_INOTIFY_WATCH:
2101 if (event->inotify_watch_final)
2102 break;
2103 if (cur->key.op == OP_ASSIGN_FINAL)
2104 event->inotify_watch_final = true;
2105 event->inotify_watch = cur->key.watch;
2106 break;
2107 case TK_A_DEVLINK_PRIO:
2108 udev_device_set_devlink_priority(event->dev, cur->key.devlink_prio);
2109 break;
2110 case TK_A_OWNER: {
2111 char owner[UTIL_NAME_SIZE];
23bf8dd7 2112 const char *ow = owner;
912541b0
KS		 2113
2114 if (event->owner_final)
2115 break;
2116 if (cur->key.op == OP_ASSIGN_FINAL)
2117 event->owner_final = true;
e20a9171 2118 udev_event_apply_format(event, rules_str(rules, cur->key.value_off), owner, sizeof(owner), false);
1edefa4f 2119 event->owner_set = true;
23bf8dd7
TG		 2120 r = get_user_creds(&ow, &event->uid, NULL, NULL, NULL);
2121 if (r < 0) {
2da03cbf 2122 log_unknown_owner(r, "user", owner);
23bf8dd7
TG		 2123 event->uid = 0;
2124 }
9f6445e3 2125 log_debug("OWNER %u %s:%u",
baa30fbc 2126 event->uid,
915bf0f6 2127 rules_str(rules, rule->rule.filename_off),
baa30fbc 2128 rule->rule.filename_line);
912541b0
KS		 2129 break;
2130 }
2131 case TK_A_GROUP: {
2132 char group[UTIL_NAME_SIZE];
23bf8dd7 2133 const char *gr = group;
912541b0
KS		 2134
2135 if (event->group_final)
2136 break;
2137 if (cur->key.op == OP_ASSIGN_FINAL)
2138 event->group_final = true;
e20a9171 2139 udev_event_apply_format(event, rules_str(rules, cur->key.value_off), group, sizeof(group), false);
1edefa4f 2140 event->group_set = true;
23bf8dd7
TG		 2141 r = get_group_creds(&gr, &event->gid);
2142 if (r < 0) {
2da03cbf 2143 log_unknown_owner(r, "group", group);
23bf8dd7
TG		 2144 event->gid = 0;
2145 }
9f6445e3 2146 log_debug("GROUP %u %s:%u",
baa30fbc 2147 event->gid,
915bf0f6 2148 rules_str(rules, rule->rule.filename_off),
baa30fbc 2149 rule->rule.filename_line);
912541b0
KS		 2150 break;
2151 }
2152 case TK_A_MODE: {
2153 char mode_str[UTIL_NAME_SIZE];
2154 mode_t mode;
2155 char *endptr;
2156
2157 if (event->mode_final)
2158 break;
e20a9171 2159 udev_event_apply_format(event, rules_str(rules, cur->key.value_off), mode_str, sizeof(mode_str), false);
912541b0
KS		 2160 mode = strtol(mode_str, &endptr, 8);
2161 if (endptr[0] != '\0') {
9f6445e3 2162 log_error("ignoring invalid mode '%s'", mode_str);
912541b0
KS		 2163 break;
2164 }
2165 if (cur->key.op == OP_ASSIGN_FINAL)
2166 event->mode_final = true;
2167 event->mode_set = true;
2168 event->mode = mode;
9f6445e3 2169 log_debug("MODE %#o %s:%u",
baa30fbc 2170 event->mode,
915bf0f6 2171 rules_str(rules, rule->rule.filename_off),
baa30fbc 2172 rule->rule.filename_line);
912541b0
KS		 2173 break;
2174 }
2175 case TK_A_OWNER_ID:
2176 if (event->owner_final)
2177 break;
2178 if (cur->key.op == OP_ASSIGN_FINAL)
2179 event->owner_final = true;
1edefa4f 2180 event->owner_set = true;
912541b0 2181 event->uid = cur->key.uid;
9f6445e3 2182 log_debug("OWNER %u %s:%u",
baa30fbc 2183 event->uid,
915bf0f6 2184 rules_str(rules, rule->rule.filename_off),
baa30fbc 2185 rule->rule.filename_line);
912541b0
KS		 2186 break;
2187 case TK_A_GROUP_ID:
2188 if (event->group_final)
2189 break;
2190 if (cur->key.op == OP_ASSIGN_FINAL)
2191 event->group_final = true;
1edefa4f 2192 event->group_set = true;
912541b0 2193 event->gid = cur->key.gid;
9f6445e3 2194 log_debug("GROUP %u %s:%u",
baa30fbc 2195 event->gid,
915bf0f6 2196 rules_str(rules, rule->rule.filename_off),
baa30fbc 2197 rule->rule.filename_line);
912541b0
KS		 2198 break;
2199 case TK_A_MODE_ID:
2200 if (event->mode_final)
2201 break;
2202 if (cur->key.op == OP_ASSIGN_FINAL)
2203 event->mode_final = true;
2204 event->mode_set = true;
2205 event->mode = cur->key.mode;
9f6445e3 2206 log_debug("MODE %#o %s:%u",
baa30fbc 2207 event->mode,
915bf0f6 2208 rules_str(rules, rule->rule.filename_off),
baa30fbc 2209 rule->rule.filename_line);
912541b0 2210 break;
c26547d6 2211 case TK_A_SECLABEL: {
4f985bd8 2212 char label_str[UTIL_LINE_SIZE] = {};
c26547d6
KS		 2213 const char *name, *label;
2214
2215 name = rules_str(rules, cur->key.attr_off);
e20a9171 2216 udev_event_apply_format(event, rules_str(rules, cur->key.value_off), label_str, sizeof(label_str), false);
4f985bd8
MS		 2217 if (label_str[0] != '\0')
2218 label = label_str;
2219 else
2220 label = rules_str(rules, cur->key.value_off);
2221
4c701096 2222 if (IN_SET(cur->key.op, OP_ASSIGN, OP_ASSIGN_FINAL))
c26547d6
KS		 2223 udev_list_cleanup(&event->seclabel_list);
2224 udev_list_entry_add(&event->seclabel_list, name, label);
9f6445e3 2225 log_debug("SECLABEL{%s}='%s' %s:%u",
c26547d6
KS		 2226 name, label,
2227 rules_str(rules, rule->rule.filename_off),
2228 rule->rule.filename_line);
2229 break;
2230 }
912541b0 2231 case TK_A_ENV: {
915bf0f6
KS		 2232 const char *name = rules_str(rules, cur->key.attr_off);
2233 char *value = rules_str(rules, cur->key.value_off);
07845c14
KS		 2234 char value_new[UTIL_NAME_SIZE];
2235 const char *value_old = NULL;
912541b0 2236
07845c14
KS		 2237 if (value[0] == '\0') {
2238 if (cur->key.op == OP_ADD)
2239 break;
912541b0 2240 udev_device_add_property(event->dev, name, NULL);
07845c14 2241 break;
912541b0 2242 }
07845c14
KS		 2243
2244 if (cur->key.op == OP_ADD)
2245 value_old = udev_device_get_property_value(event->dev, name);
2246 if (value_old) {
2247 char temp[UTIL_NAME_SIZE];
2248
2249 /* append value separated by space */
e20a9171 2250 udev_event_apply_format(event, value, temp, sizeof(temp), false);
d5a89d7d 2251 strscpyl(value_new, sizeof(value_new), value_old, " ", temp, NULL);
07845c14 2252 } else
e20a9171 2253 udev_event_apply_format(event, value, value_new, sizeof(value_new), false);
07845c14 2254
df546eb5 2255 udev_device_add_property(event->dev, name, value_new);
912541b0
KS		 2256 break;
2257 }
2258 case TK_A_TAG: {
2259 char tag[UTIL_PATH_SIZE];
2260 const char *p;
2261
e20a9171 2262 udev_event_apply_format(event, rules_str(rules, cur->key.value_off), tag, sizeof(tag), false);
4c701096 2263 if (IN_SET(cur->key.op, OP_ASSIGN, OP_ASSIGN_FINAL))
912541b0
KS		 2264 udev_device_cleanup_tags_list(event->dev);
2265 for (p = tag; *p != '\0'; p++) {
2266 if ((*p >= 'a' && *p <= 'z') ||
2267 (*p >= 'A' && *p <= 'Z') ||
2268 (*p >= '0' && *p <= '9') ||
4c701096 2269 IN_SET(*p, '-', '_'))
912541b0 2270 continue;
9f6445e3 2271 log_error("ignoring invalid tag name '%s'", tag);
912541b0
KS		 2272 break;
2273 }
8e3ba377
DH		 2274 if (cur->key.op == OP_REMOVE)
2275 udev_device_remove_tag(event->dev, tag);
2276 else
2277 udev_device_add_tag(event->dev, tag);
912541b0
KS		 2278 break;
2279 }
2280 case TK_A_NAME: {
915bf0f6 2281 const char *name = rules_str(rules, cur->key.value_off);
0ecfcbd4 2282
912541b0
KS		 2283 char name_str[UTIL_PATH_SIZE];
2284 int count;
2285
2286 if (event->name_final)
2287 break;
2288 if (cur->key.op == OP_ASSIGN_FINAL)
2289 event->name_final = true;
e20a9171 2290 udev_event_apply_format(event, name, name_str, sizeof(name_str), false);
4c701096 2291 if (IN_SET(esc, ESCAPE_UNSET, ESCAPE_REPLACE)) {
912541b0
KS		 2292 count = util_replace_chars(name_str, "/");
2293 if (count > 0)
9f6445e3 2294 log_debug("%i character(s) replaced", count);
912541b0 2295 }
6ada823a 2296 if (major(udev_device_get_devnum(event->dev)) &&
99f16bb8
ZJS		 2297 !streq(name_str, udev_device_get_devnode(event->dev) + strlen("/dev/"))) {
2298 log_error("NAME=\"%s\" ignored, kernel device nodes cannot be renamed; please fix it in %s:%u\n",
2299 name,
2300 rules_str(rules, rule->rule.filename_off),
2301 rule->rule.filename_line);
6ada823a 2302 break;
0ecfcbd4 2303 }
4fd6af76
ZJS		 2304 if (free_and_strdup(&event->name, name_str) < 0) {
2305 log_oom();
2306 return;
2307 }
9f6445e3 2308 log_debug("NAME '%s' %s:%u",
baa30fbc 2309 event->name,
915bf0f6 2310 rules_str(rules, rule->rule.filename_off),
baa30fbc 2311 rule->rule.filename_line);
912541b0
KS		 2312 break;
2313 }
2314 case TK_A_DEVLINK: {
2315 char temp[UTIL_PATH_SIZE];
2316 char filename[UTIL_PATH_SIZE];
2317 char *pos, *next;
2318 int count = 0;
2319
2320 if (event->devlink_final)
2321 break;
2322 if (major(udev_device_get_devnum(event->dev)) == 0)
2323 break;
2324 if (cur->key.op == OP_ASSIGN_FINAL)
2325 event->devlink_final = true;
4c701096 2326 if (IN_SET(cur->key.op, OP_ASSIGN, OP_ASSIGN_FINAL))
912541b0
KS		 2327 udev_device_cleanup_devlinks_list(event->dev);
2328
2329 /* allow multiple symlinks separated by spaces */
0a10235e 2330 udev_event_apply_format(event, rules_str(rules, cur->key.value_off), temp, sizeof(temp), esc != ESCAPE_NONE);
912541b0
KS		 2331 if (esc == ESCAPE_UNSET)
2332 count = util_replace_chars(temp, "/ ");
2333 else if (esc == ESCAPE_REPLACE)
2334 count = util_replace_chars(temp, "/");
2335 if (count > 0)
9f6445e3 2336 log_debug("%i character(s) replaced" , count);
912541b0
KS		 2337 pos = temp;
2338 while (isspace(pos[0]))
2339 pos++;
2340 next = strchr(pos, ' ');
2341 while (next != NULL) {
2342 next[0] = '\0';
9f6445e3 2343 log_debug("LINK '%s' %s:%u", pos,
915bf0f6 2344 rules_str(rules, rule->rule.filename_off), rule->rule.filename_line);
d5a89d7d 2345 strscpyl(filename, sizeof(filename), "/dev/", pos, NULL);
8a173387 2346 udev_device_add_devlink(event->dev, filename);
912541b0
KS		 2347 while (isspace(next[1]))
2348 next++;
2349 pos = &next[1];
2350 next = strchr(pos, ' ');
2351 }
2352 if (pos[0] != '\0') {
9f6445e3 2353 log_debug("LINK '%s' %s:%u", pos,
915bf0f6 2354 rules_str(rules, rule->rule.filename_off), rule->rule.filename_line);
d5a89d7d 2355 strscpyl(filename, sizeof(filename), "/dev/", pos, NULL);
8a173387 2356 udev_device_add_devlink(event->dev, filename);
912541b0
KS		 2357 }
2358 break;
2359 }
2360 case TK_A_ATTR: {
915bf0f6 2361 const char *key_name = rules_str(rules, cur->key.attr_off);
912541b0
KS		 2362 char attr[UTIL_PATH_SIZE];
2363 char value[UTIL_NAME_SIZE];
fdd21be6 2364 _cleanup_fclose_ FILE *f = NULL;
912541b0
KS		 2365
2366 if (util_resolve_subsys_kernel(event->udev, key_name, attr, sizeof(attr), 0) != 0)
d5a89d7d 2367 strscpyl(attr, sizeof(attr), udev_device_get_syspath(event->dev), "/", key_name, NULL);
912541b0
KS		 2368 attr_subst_subdir(attr, sizeof(attr));
2369
e20a9171 2370 udev_event_apply_format(event, rules_str(rules, cur->key.value_off), value, sizeof(value), false);
9f6445e3 2371 log_debug("ATTR '%s' writing '%s' %s:%u", attr, value,
915bf0f6 2372 rules_str(rules, rule->rule.filename_off),
baa30fbc 2373 rule->rule.filename_line);
47ef94ac 2374 f = fopen(attr, "we");
fdd21be6 2375 if (f == NULL)
56f64d95 2376 log_error_errno(errno, "error opening ATTR{%s} for writing: %m", attr);
fdd21be6
ZJS		 2377 else if (fprintf(f, "%s", value) <= 0)
2378 log_error_errno(errno, "error writing ATTR{%s}: %m", attr);
912541b0
KS		 2379 break;
2380 }
f4cf2e5b
KS		 2381 case TK_A_SYSCTL: {
2382 char filename[UTIL_PATH_SIZE];
2383 char value[UTIL_NAME_SIZE];
f4cf2e5b 2384
e20a9171 2385 udev_event_apply_format(event, rules_str(rules, cur->key.attr_off), filename, sizeof(filename), false);
f4cf2e5b 2386 sysctl_normalize(filename);
e20a9171 2387 udev_event_apply_format(event, rules_str(rules, cur->key.value_off), value, sizeof(value), false);
f4cf2e5b
KS		 2388 log_debug("SYSCTL '%s' writing '%s' %s:%u", filename, value,
2389 rules_str(rules, rule->rule.filename_off), rule->rule.filename_line);
2390 r = sysctl_write(filename, value);
2391 if (r < 0)
46b57b6e 2392 log_error_errno(r, "error writing SYSCTL{%s}='%s': %m", filename, value);
f4cf2e5b
KS		 2393 break;
2394 }
83cd6b75
KS		 2395 case TK_A_RUN_BUILTIN:
2396 case TK_A_RUN_PROGRAM: {
2397 struct udev_list_entry *entry;
2398
4c701096 2399 if (IN_SET(cur->key.op, OP_ASSIGN, OP_ASSIGN_FINAL))
912541b0 2400 udev_list_cleanup(&event->run_list);
9f6445e3 2401 log_debug("RUN '%s' %s:%u",
915bf0f6
KS		 2402 rules_str(rules, cur->key.value_off),
2403 rules_str(rules, rule->rule.filename_off),
baa30fbc 2404 rule->rule.filename_line);
915bf0f6 2405 entry = udev_list_entry_add(&event->run_list, rules_str(rules, cur->key.value_off), NULL);
83cd6b75 2406 udev_list_entry_set_num(entry, cur->key.builtin_cmd);
912541b0
KS		 2407 break;
2408 }
2409 case TK_A_GOTO:
2410 if (cur->key.rule_goto == 0)
2411 break;
2412 cur = &rules->tokens[cur->key.rule_goto];
2413 continue;
2414 case TK_END:
4fd6af76 2415 return;
912541b0
KS		 2416
2417 case TK_M_PARENTS_MIN:
2418 case TK_M_PARENTS_MAX:
2419 case TK_M_MAX:
2420 case TK_UNSET:
9f6445e3 2421 log_error("wrong type %u", cur->type);
912541b0
KS		 2422 goto nomatch;
2423 }
2424
2425 cur++;
2426 continue;
2427 nomatch:
2428 /* fast-forward to next rule */
2429 cur = rule + rule->rule.token_count;
912541b0 2430 }
6880b25d 2431}
761dfddc 2432
9ec6e95b 2433int udev_rules_apply_static_dev_perms(struct udev_rules *rules) {
912541b0
KS		 2434 struct token *cur;
2435 struct token *rule;
2436 uid_t uid = 0;
2437 gid_t gid = 0;
2438 mode_t mode = 0;
84b6ad70
TG		 2439 _cleanup_strv_free_ char **tags = NULL;
2440 char **t;
2441 FILE *f = NULL;
2442 _cleanup_free_ char *path = NULL;
fdd21be6 2443 int r;
912541b0
KS		 2444
2445 if (rules->tokens == NULL)
84b6ad70 2446 return 0;
912541b0
KS		 2447
2448 cur = &rules->tokens[0];
2449 rule = cur;
2450 for (;;) {
2451 switch (cur->type) {
2452 case TK_RULE:
2453 /* current rule */
2454 rule = cur;
2455
2456 /* skip rules without a static_node tag */
2457 if (!rule->rule.has_static_node)
2458 goto next;
2459
2460 uid = 0;
2461 gid = 0;
2462 mode = 0;
97b11eed 2463 tags = strv_free(tags);
912541b0
KS		 2464 break;
2465 case TK_A_OWNER_ID:
2466 uid = cur->key.uid;
2467 break;
2468 case TK_A_GROUP_ID:
2469 gid = cur->key.gid;
2470 break;
2471 case TK_A_MODE_ID:
2472 mode = cur->key.mode;
84b6ad70
TG		 2473 break;
2474 case TK_A_TAG:
2475 r = strv_extend(&tags, rules_str(rules, cur->key.value_off));
2476 if (r < 0)
2477 goto finish;
2478
912541b0
KS		 2479 break;
2480 case TK_A_STATIC_NODE: {
84b6ad70
TG		 2481 char device_node[UTIL_PATH_SIZE];
2482 char tags_dir[UTIL_PATH_SIZE];
2483 char tag_symlink[UTIL_PATH_SIZE];
912541b0
KS		 2484 struct stat stats;
2485
2486 /* we assure, that the permissions tokens are sorted before the static token */
ca2bb160 2487
84b6ad70 2488 if (mode == 0 && uid == 0 && gid == 0 && tags == NULL)
912541b0 2489 goto next;
d6f116a7 2490
84b6ad70 2491 strscpyl(device_node, sizeof(device_node), "/dev/", rules_str(rules, cur->key.value_off), NULL);
ca2bb160
KS		 2492 if (stat(device_node, &stats) != 0)
2493 break;
2494 if (!S_ISBLK(stats.st_mode) && !S_ISCHR(stats.st_mode))
2495 break;
84b6ad70 2496
d6f116a7 2497 /* export the tags to a directory as symlinks, allowing otherwise dead nodes to be tagged */
84b6ad70 2498 if (tags) {
84b6ad70
TG		 2499 STRV_FOREACH(t, tags) {
2500 _cleanup_free_ char *unescaped_filename = NULL;
2501
2502 strscpyl(tags_dir, sizeof(tags_dir), "/run/udev/static_node-tags/", *t, "/", NULL);
2503 r = mkdir_p(tags_dir, 0755);
f647962d
MS		 2504 if (r < 0)
2505 return log_error_errno(r, "failed to create %s: %m", tags_dir);
84b6ad70
TG		 2506
2507 unescaped_filename = xescape(rules_str(rules, cur->key.value_off), "/.");
2508
2509 strscpyl(tag_symlink, sizeof(tag_symlink), tags_dir, unescaped_filename, NULL);
2510 r = symlink(device_node, tag_symlink);
4a62c710
MS		 2511 if (r < 0 && errno != EEXIST)
2512 return log_error_errno(errno, "failed to create symlink %s -> %s: %m",
2513 tag_symlink, device_node);
84b6ad70
TG		 2514 }
2515 }
2516
15a72200
TG		 2517 /* don't touch the permissions if only the tags were set */
2518 if (mode == 0 && uid == 0 && gid == 0)
d6f116a7
KS		 2519 break;
2520
912541b0
KS		 2521 if (mode == 0) {
2522 if (gid > 0)
2523 mode = 0660;
2524 else
2525 mode = 0600;
2526 }
2527 if (mode != (stats.st_mode & 01777)) {
490f0087 2528 r = chmod(device_node, mode);
25f027c5
ZJS		 2529 if (r < 0)
2530 return log_error_errno(errno, "Failed to chmod '%s' %#o: %m",
2531 device_node, mode);
2532 else
9f6445e3 2533 log_debug("chmod '%s' %#o", device_node, mode);
912541b0
KS		 2534 }
2535
2536 if ((uid != 0 && uid != stats.st_uid) || (gid != 0 && gid != stats.st_gid)) {
490f0087 2537 r = chown(device_node, uid, gid);
25f027c5
ZJS		 2538 if (r < 0)
2539 return log_error_errno(errno, "Failed to chown '%s' %u %u: %m",
2540 device_node, uid, gid);
2541 else
9f6445e3 2542 log_debug("chown '%s' %u %u", device_node, uid, gid);
912541b0
KS		 2543 }
2544
84b6ad70 2545 utimensat(AT_FDCWD, device_node, NULL, 0);
912541b0
KS		 2546 break;
2547 }
2548 case TK_END:
84b6ad70 2549 goto finish;
912541b0
KS		 2550 }
2551
2552 cur++;
2553 continue;
761dfddc 2554next:
912541b0
KS		 2555 /* fast-forward to next rule */
2556 cur = rule + rule->rule.token_count;
2557 continue;
2558 }
84b6ad70
TG		 2559
2560finish:
2561 if (f) {
2562 fflush(f);
2563 fchmod(fileno(f), 0644);
2564 if (ferror(f) || rename(path, "/run/udev/static_node-tags") < 0) {
fdd21be6
ZJS		 2565 unlink_noerrno("/run/udev/static_node-tags");
2566 unlink_noerrno(path);
2567 return -errno;
84b6ad70 2568 }
84b6ad70
TG		 2569 }
2570
fdd21be6 2571 return 0;
761dfddc 2572}
Unnamed repository; edit this file 'description' to name the repository.