]> git.ipfire.org Git - thirdparty/systemd.git/blame - src/udev/udev-rules.c
projects / thirdparty / systemd.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
tests: add test for #3166 (#3180)
[thirdparty/systemd.git] / src / udev / udev-rules.c
CommitLineData
2232cac8 1/*
1298001e 2 * Copyright (C) 2003-2012 Kay Sievers <kay@vrfy.org>
2232cac8 3 *
55e9959b
KS		 4 * This program is free software: you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation, either version 2 of the License, or
7 * (at your option) any later version.
3d6d12c6 8 *
55e9959b
KS		 9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
2232cac8 13 *
55e9959b
KS		 14 * You should have received a copy of the GNU General Public License
15 * along with this program. If not, see <http://www.gnu.org/licenses/>.
2232cac8
GKH		 16 */
17
2232cac8 18#include <ctype.h>
5ee7ecfb 19#include <dirent.h>
4f5dd394
LP		 20#include <errno.h>
21#include <fcntl.h>
cea61f5c 22#include <fnmatch.h>
4f5dd394
LP		 23#include <limits.h>
24#include <stdbool.h>
25#include <stddef.h>
26#include <stdio.h>
27#include <stdlib.h>
28#include <string.h>
959e8b5d 29#include <time.h>
4f5dd394 30#include <unistd.h>
2232cac8 31
b5efdb8a 32#include "alloc-util.h"
2c21044f 33#include "conf-files.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"
8fcde012 39#include "stat-util.h"
f4850a1d 40#include "stdio-util.h"
915bf0f6 41#include "strbuf.h"
07630cea 42#include "string-util.h"
84b6ad70 43#include "strv.h"
f4cf2e5b 44#include "sysctl-util.h"
4f5dd394 45#include "udev.h"
b1d4f8e1 46#include "user-util.h"
07630cea 47#include "util.h"
2232cac8 48
a1525d17 49#define PREALLOC_TOKEN 2048
c7521974 50
4052400f 51struct uid_gid {
912541b0
KS		 52 unsigned int name_off;
53 union {
a1525d17
KS		 54 uid_t uid;
55 gid_t gid;
912541b0 56 };
4052400f
KS		 57};
58
2ad8416d
ZJS		 59static const char* const rules_dirs[] = {
60 "/etc/udev/rules.d",
61 "/run/udev/rules.d",
62 UDEVLIBEXECDIR "/rules.d",
4f5dd394
LP		 63 NULL
64};
2ad8416d 65
4052400f 66struct udev_rules {
912541b0 67 struct udev *udev;
97f2d76d 68 usec_t dirs_ts_usec;
912541b0
KS		 69 int resolve_names;
70
71 /* every key in the rules file becomes a token */
72 struct token *tokens;
73 unsigned int token_cur;
74 unsigned int token_max;
75
ab06eef8 76 /* all key strings are copied and de-duplicated in a single continuous string buffer */
915bf0f6 77 struct strbuf *strbuf;
912541b0
KS		 78
79 /* during rule parsing, uid/gid lookup results are cached */
80 struct uid_gid *uids;
81 unsigned int uids_cur;
82 unsigned int uids_max;
83 struct uid_gid *gids;
84 unsigned int gids_cur;
85 unsigned int gids_max;
4052400f
KS		 86};
87
915bf0f6
KS		 88static char *rules_str(struct udev_rules *rules, unsigned int off) {
89 return rules->strbuf->buf + off;
90}
91
92static unsigned int rules_add_string(struct udev_rules *rules, const char *s) {
93 return strbuf_add_string(rules->strbuf, s, strlen(s));
94}
95
8e3ba377 96/* KEY=="", KEY!="", KEY+="", KEY-="", KEY="", KEY:="" */
b0f7409f 97enum operation_type {
912541b0 98 OP_UNSET,
b0f7409f 99
912541b0
KS		 100 OP_MATCH,
101 OP_NOMATCH,
102 OP_MATCH_MAX,
b0f7409f 103
912541b0 104 OP_ADD,
8e3ba377 105 OP_REMOVE,
912541b0
KS		 106 OP_ASSIGN,
107 OP_ASSIGN_FINAL,
c7521974
KS		 108};
109
ac218d9c 110enum string_glob_type {
912541b0 111 GL_UNSET,
a1525d17 112 GL_PLAIN, /* no special chars */
912541b0 113 GL_GLOB, /* shell globs ?,*,[] */
a1525d17
KS		 114 GL_SPLIT, /* multi-value A|B */
115 GL_SPLIT_GLOB, /* multi-value with glob A*|B* */
116 GL_SOMETHING, /* commonly used "?*" */
ac218d9c
KS		 117};
118
32028733 119enum string_subst_type {
912541b0
KS		 120 SB_UNSET,
121 SB_NONE,
122 SB_FORMAT,
123 SB_SUBSYS,
32028733
KS		 124};
125
154a7b84 126/* tokens of a rule are sorted/handled in this order */
6880b25d 127enum token_type {
912541b0
KS		 128 TK_UNSET,
129 TK_RULE,
130
a1525d17
KS		 131 TK_M_ACTION, /* val */
132 TK_M_DEVPATH, /* val */
133 TK_M_KERNEL, /* val */
134 TK_M_DEVLINK, /* val */
135 TK_M_NAME, /* val */
136 TK_M_ENV, /* val, attr */
137 TK_M_TAG, /* val */
138 TK_M_SUBSYSTEM, /* val */
139 TK_M_DRIVER, /* val */
140 TK_M_WAITFOR, /* val */
141 TK_M_ATTR, /* val, attr */
f4cf2e5b 142 TK_M_SYSCTL, /* val, attr */
912541b0
KS		 143
144 TK_M_PARENTS_MIN,
a1525d17 145 TK_M_KERNELS, /* val */
912541b0 146 TK_M_SUBSYSTEMS, /* val */
a1525d17
KS		 147 TK_M_DRIVERS, /* val */
148 TK_M_ATTRS, /* val, attr */
149 TK_M_TAGS, /* val */
912541b0
KS		 150 TK_M_PARENTS_MAX,
151
a1525d17 152 TK_M_TEST, /* val, mode_t */
a1525d17
KS		 153 TK_M_PROGRAM, /* val */
154 TK_M_IMPORT_FILE, /* val */
155 TK_M_IMPORT_PROG, /* val */
156 TK_M_IMPORT_BUILTIN, /* val */
157 TK_M_IMPORT_DB, /* val */
158 TK_M_IMPORT_CMDLINE, /* val */
159 TK_M_IMPORT_PARENT, /* val */
160 TK_M_RESULT, /* val */
912541b0
KS		 161 TK_M_MAX,
162
163 TK_A_STRING_ESCAPE_NONE,
164 TK_A_STRING_ESCAPE_REPLACE,
165 TK_A_DB_PERSIST,
a1525d17
KS		 166 TK_A_INOTIFY_WATCH, /* int */
167 TK_A_DEVLINK_PRIO, /* int */
168 TK_A_OWNER, /* val */
169 TK_A_GROUP, /* val */
170 TK_A_MODE, /* val */
171 TK_A_OWNER_ID, /* uid_t */
172 TK_A_GROUP_ID, /* gid_t */
173 TK_A_MODE_ID, /* mode_t */
84b6ad70 174 TK_A_TAG, /* val */
a1525d17 175 TK_A_STATIC_NODE, /* val */
c26547d6 176 TK_A_SECLABEL, /* val, attr */
a1525d17 177 TK_A_ENV, /* val, attr */
a1525d17
KS		 178 TK_A_NAME, /* val */
179 TK_A_DEVLINK, /* val */
180 TK_A_ATTR, /* val, attr */
f4cf2e5b 181 TK_A_SYSCTL, /* val, attr */
83cd6b75
KS		 182 TK_A_RUN_BUILTIN, /* val, bool */
183 TK_A_RUN_PROGRAM, /* val, bool */
a1525d17 184 TK_A_GOTO, /* size_t */
912541b0
KS		 185
186 TK_END,
c7521974
KS		 187};
188
3f3aa9f5 189/* we try to pack stuff in a way that we take only 12 bytes per token */
4052400f 190struct token {
912541b0
KS		 191 union {
192 unsigned char type; /* same in rule and key */
193 struct {
194 enum token_type type:8;
195 bool can_set_name:1;
196 bool has_static_node:1;
197 unsigned int unused:6;
198 unsigned short token_count;
199 unsigned int label_off;
200 unsigned short filename_off;
201 unsigned short filename_line;
202 } rule;
203 struct {
204 enum token_type type:8;
205 enum operation_type op:8;
206 enum string_glob_type glob:8;
207 enum string_subst_type subst:4;
208 enum string_subst_type attrsubst:4;
209 unsigned int value_off;
210 union {
211 unsigned int attr_off;
912541b0
KS		 212 unsigned int rule_goto;
213 mode_t mode;
214 uid_t uid;
215 gid_t gid;
216 int devlink_prio;
912541b0
KS		 217 int watch;
218 enum udev_builtin_cmd builtin_cmd;
219 };
220 } key;
221 };
4052400f
KS		 222};
223
912541b0 224#define MAX_TK 64
4052400f 225struct rule_tmp {
912541b0
KS		 226 struct udev_rules *rules;
227 struct token rule;
228 struct token token[MAX_TK];
229 unsigned int token_cur;
4052400f
KS		 230};
231
baa30fbc 232#ifdef DEBUG
9ec6e95b 233static const char *operation_str(enum operation_type type) {
912541b0 234 static const char *operation_strs[] = {
a1525d17
KS		 235 [OP_UNSET] = "UNSET",
236 [OP_MATCH] = "match",
237 [OP_NOMATCH] = "nomatch",
912541b0
KS		 238 [OP_MATCH_MAX] = "MATCH_MAX",
239
a1525d17 240 [OP_ADD] = "add",
8e3ba377 241 [OP_REMOVE] = "remove",
a1525d17
KS		 242 [OP_ASSIGN] = "assign",
243 [OP_ASSIGN_FINAL] = "assign-final",
912541b0
KS		 244} ;
245
246 return operation_strs[type];
5d6a1fa6 247}
4052400f 248
9ec6e95b 249static const char *string_glob_str(enum string_glob_type type) {
912541b0 250 static const char *string_glob_strs[] = {
a1525d17
KS		 251 [GL_UNSET] = "UNSET",
252 [GL_PLAIN] = "plain",
253 [GL_GLOB] = "glob",
254 [GL_SPLIT] = "split",
255 [GL_SPLIT_GLOB] = "split-glob",
256 [GL_SOMETHING] = "split-glob",
912541b0
KS		 257 };
258
259 return string_glob_strs[type];
5d6a1fa6
KS		 260}
261
9ec6e95b 262static const char *token_str(enum token_type type) {
912541b0 263 static const char *token_strs[] = {
a1525d17
KS		 264 [TK_UNSET] = "UNSET",
265 [TK_RULE] = "RULE",
912541b0 266
a1525d17 267 [TK_M_ACTION] = "M ACTION",
912541b0 268 [TK_M_DEVPATH] = "M DEVPATH",
a1525d17 269 [TK_M_KERNEL] = "M KERNEL",
912541b0 270 [TK_M_DEVLINK] = "M DEVLINK",
a1525d17
KS		 271 [TK_M_NAME] = "M NAME",
272 [TK_M_ENV] = "M ENV",
273 [TK_M_TAG] = "M TAG",
274 [TK_M_SUBSYSTEM] = "M SUBSYSTEM",
275 [TK_M_DRIVER] = "M DRIVER",
912541b0 276 [TK_M_WAITFOR] = "M WAITFOR",
a1525d17 277 [TK_M_ATTR] = "M ATTR",
f4cf2e5b 278 [TK_M_SYSCTL] = "M SYSCTL",
912541b0 279
a1525d17 280 [TK_M_PARENTS_MIN] = "M PARENTS_MIN",
912541b0 281 [TK_M_KERNELS] = "M KERNELS",
a1525d17 282 [TK_M_SUBSYSTEMS] = "M SUBSYSTEMS",
912541b0 283 [TK_M_DRIVERS] = "M DRIVERS",
a1525d17
KS		 284 [TK_M_ATTRS] = "M ATTRS",
285 [TK_M_TAGS] = "M TAGS",
286 [TK_M_PARENTS_MAX] = "M PARENTS_MAX",
912541b0 287
a1525d17 288 [TK_M_TEST] = "M TEST",
912541b0 289 [TK_M_PROGRAM] = "M PROGRAM",
a1525d17
KS		 290 [TK_M_IMPORT_FILE] = "M IMPORT_FILE",
291 [TK_M_IMPORT_PROG] = "M IMPORT_PROG",
292 [TK_M_IMPORT_BUILTIN] = "M IMPORT_BUILTIN",
293 [TK_M_IMPORT_DB] = "M IMPORT_DB",
294 [TK_M_IMPORT_CMDLINE] = "M IMPORT_CMDLINE",
295 [TK_M_IMPORT_PARENT] = "M IMPORT_PARENT",
296 [TK_M_RESULT] = "M RESULT",
297 [TK_M_MAX] = "M MAX",
298
299 [TK_A_STRING_ESCAPE_NONE] = "A STRING_ESCAPE_NONE",
300 [TK_A_STRING_ESCAPE_REPLACE] = "A STRING_ESCAPE_REPLACE",
301 [TK_A_DB_PERSIST] = "A DB_PERSIST",
302 [TK_A_INOTIFY_WATCH] = "A INOTIFY_WATCH",
303 [TK_A_DEVLINK_PRIO] = "A DEVLINK_PRIO",
304 [TK_A_OWNER] = "A OWNER",
305 [TK_A_GROUP] = "A GROUP",
306 [TK_A_MODE] = "A MODE",
307 [TK_A_OWNER_ID] = "A OWNER_ID",
308 [TK_A_GROUP_ID] = "A GROUP_ID",
309 [TK_A_STATIC_NODE] = "A STATIC_NODE",
c26547d6 310 [TK_A_SECLABEL] = "A SECLABEL",
912541b0 311 [TK_A_MODE_ID] = "A MODE_ID",
a1525d17
KS		 312 [TK_A_ENV] = "A ENV",
313 [TK_A_TAG] = "A ENV",
314 [TK_A_NAME] = "A NAME",
912541b0 315 [TK_A_DEVLINK] = "A DEVLINK",
a1525d17 316 [TK_A_ATTR] = "A ATTR",
f4cf2e5b 317 [TK_A_SYSCTL] = "A SYSCTL",
83cd6b75
KS		 318 [TK_A_RUN_BUILTIN] = "A RUN_BUILTIN",
319 [TK_A_RUN_PROGRAM] = "A RUN_PROGRAM",
a1525d17 320 [TK_A_GOTO] = "A GOTO",
912541b0 321
a1525d17 322 [TK_END] = "END",
912541b0
KS		 323 };
324
325 return token_strs[type];
5d6a1fa6 326}
c7521974 327
9ec6e95b 328static void dump_token(struct udev_rules *rules, struct token *token) {
912541b0
KS		 329 enum token_type type = token->type;
330 enum operation_type op = token->key.op;
331 enum string_glob_type glob = token->key.glob;
915bf0f6 332 const char *value = str(rules, token->key.value_off);
912541b0
KS		 333 const char *attr = &rules->buf[token->key.attr_off];
334
335 switch (type) {
336 case TK_RULE:
337 {
338 const char *tks_ptr = (char *)rules->tokens;
339 const char *tk_ptr = (char *)token;
340 unsigned int idx = (tk_ptr - tks_ptr) / sizeof(struct token);
341
9f6445e3 342 log_debug("* RULE %s:%u, token: %u, count: %u, label: '%s'",
baa30fbc
KS		 343 &rules->buf[token->rule.filename_off], token->rule.filename_line,
344 idx, token->rule.token_count,
345 &rules->buf[token->rule.label_off]);
912541b0
KS		 346 break;
347 }
348 case TK_M_ACTION:
349 case TK_M_DEVPATH:
350 case TK_M_KERNEL:
351 case TK_M_SUBSYSTEM:
352 case TK_M_DRIVER:
353 case TK_M_WAITFOR:
354 case TK_M_DEVLINK:
355 case TK_M_NAME:
356 case TK_M_KERNELS:
357 case TK_M_SUBSYSTEMS:
358 case TK_M_DRIVERS:
359 case TK_M_TAGS:
360 case TK_M_PROGRAM:
361 case TK_M_IMPORT_FILE:
362 case TK_M_IMPORT_PROG:
363 case TK_M_IMPORT_DB:
364 case TK_M_IMPORT_CMDLINE:
365 case TK_M_IMPORT_PARENT:
366 case TK_M_RESULT:
367 case TK_A_NAME:
368 case TK_A_DEVLINK:
369 case TK_A_OWNER:
370 case TK_A_GROUP:
371 case TK_A_MODE:
83cd6b75
KS		 372 case TK_A_RUN_BUILTIN:
373 case TK_A_RUN_PROGRAM:
9f6445e3 374 log_debug("%s %s '%s'(%s)",
baa30fbc 375 token_str(type), operation_str(op), value, string_glob_str(glob));
912541b0
KS		 376 break;
377 case TK_M_IMPORT_BUILTIN:
9f6445e3 378 log_debug("%s %i '%s'", token_str(type), token->key.builtin_cmd, value);
912541b0
KS		 379 break;
380 case TK_M_ATTR:
f4cf2e5b 381 case TK_M_SYSCTL:
912541b0
KS		 382 case TK_M_ATTRS:
383 case TK_M_ENV:
384 case TK_A_ATTR:
f4cf2e5b 385 case TK_A_SYSCTL:
912541b0 386 case TK_A_ENV:
9f6445e3 387 log_debug("%s %s '%s' '%s'(%s)",
baa30fbc 388 token_str(type), operation_str(op), attr, value, string_glob_str(glob));
912541b0
KS		 389 break;
390 case TK_M_TAG:
391 case TK_A_TAG:
9f6445e3 392 log_debug("%s %s '%s'", token_str(type), operation_str(op), value);
912541b0
KS		 393 break;
394 case TK_A_STRING_ESCAPE_NONE:
395 case TK_A_STRING_ESCAPE_REPLACE:
396 case TK_A_DB_PERSIST:
9f6445e3 397 log_debug("%s", token_str(type));
912541b0
KS		 398 break;
399 case TK_M_TEST:
9f6445e3 400 log_debug("%s %s '%s'(%s) %#o",
baa30fbc 401 token_str(type), operation_str(op), value, string_glob_str(glob), token->key.mode);
912541b0
KS		 402 break;
403 case TK_A_INOTIFY_WATCH:
9f6445e3 404 log_debug("%s %u", token_str(type), token->key.watch);
912541b0
KS		 405 break;
406 case TK_A_DEVLINK_PRIO:
9f6445e3 407 log_debug("%s %u", token_str(type), token->key.devlink_prio);
912541b0
KS		 408 break;
409 case TK_A_OWNER_ID:
9f6445e3 410 log_debug("%s %s %u", token_str(type), operation_str(op), token->key.uid);
912541b0
KS		 411 break;
412 case TK_A_GROUP_ID:
9f6445e3 413 log_debug("%s %s %u", token_str(type), operation_str(op), token->key.gid);
912541b0
KS		 414 break;
415 case TK_A_MODE_ID:
9f6445e3 416 log_debug("%s %s %#o", token_str(type), operation_str(op), token->key.mode);
912541b0
KS		 417 break;
418 case TK_A_STATIC_NODE:
9f6445e3 419 log_debug("%s '%s'", token_str(type), value);
912541b0 420 break;
c26547d6 421 case TK_A_SECLABEL:
9f6445e3 422 log_debug("%s %s '%s' '%s'", token_str(type), operation_str(op), attr, value);
c26547d6 423 break;
912541b0 424 case TK_A_GOTO:
9f6445e3 425 log_debug("%s '%s' %u", token_str(type), value, token->key.rule_goto);
912541b0
KS		 426 break;
427 case TK_END:
9f6445e3 428 log_debug("* %s", token_str(type));
912541b0
KS		 429 break;
430 case TK_M_PARENTS_MIN:
431 case TK_M_PARENTS_MAX:
432 case TK_M_MAX:
433 case TK_UNSET:
9f6445e3 434 log_debug("unknown type %u", type);
912541b0
KS		 435 break;
436 }
4052400f 437}
154a7b84 438
9ec6e95b 439static void dump_rules(struct udev_rules *rules) {
912541b0
KS		 440 unsigned int i;
441
9f6445e3 442 log_debug("dumping %u (%zu bytes) tokens, %u (%zu bytes) strings",
baa30fbc
KS		 443 rules->token_cur,
444 rules->token_cur * sizeof(struct token),
445 rules->buf_count,
446 rules->buf_cur);
f168c273 447 for (i = 0; i < rules->token_cur; i++)
912541b0 448 dump_token(rules, &rules->tokens[i]);
4052400f
KS		 449}
450#else
4052400f
KS		 451static inline void dump_token(struct udev_rules *rules, struct token *token) {}
452static inline void dump_rules(struct udev_rules *rules) {}
baa30fbc 453#endif /* DEBUG */
c7521974 454
9ec6e95b 455static int add_token(struct udev_rules *rules, struct token *token) {
912541b0
KS		 456 /* grow buffer if needed */
457 if (rules->token_cur+1 >= rules->token_max) {
458 struct token *tokens;
459 unsigned int add;
460
461 /* double the buffer size */
462 add = rules->token_max;
463 if (add < 8)
464 add = 8;
465
466 tokens = realloc(rules->tokens, (rules->token_max + add ) * sizeof(struct token));
467 if (tokens == NULL)
468 return -1;
912541b0
KS		 469 rules->tokens = tokens;
470 rules->token_max += add;
471 }
472 memcpy(&rules->tokens[rules->token_cur], token, sizeof(struct token));
473 rules->token_cur++;
474 return 0;
c7521974 475}
a27cd06c 476
9ec6e95b 477static uid_t add_uid(struct udev_rules *rules, const char *owner) {
912541b0 478 unsigned int i;
23bf8dd7 479 uid_t uid = 0;
912541b0 480 unsigned int off;
23bf8dd7 481 int r;
912541b0
KS		 482
483 /* lookup, if we know it already */
484 for (i = 0; i < rules->uids_cur; i++) {
485 off = rules->uids[i].name_off;
915bf0f6 486 if (streq(rules_str(rules, off), owner)) {
912541b0 487 uid = rules->uids[i].uid;
912541b0
KS		 488 return uid;
489 }
490 }
23bf8dd7
TG		 491 r = get_user_creds(&owner, &uid, NULL, NULL, NULL);
492 if (r < 0) {
493 if (r == -ENOENT || r == -ESRCH)
ff49bc32 494 log_error("specified user '%s' unknown", owner);
23bf8dd7 495 else
279d3c9c 496 log_error_errno(r, "error resolving user '%s': %m", owner);
23bf8dd7 497 }
912541b0
KS		 498
499 /* grow buffer if needed */
500 if (rules->uids_cur+1 >= rules->uids_max) {
501 struct uid_gid *uids;
502 unsigned int add;
503
504 /* double the buffer size */
505 add = rules->uids_max;
506 if (add < 1)
507 add = 8;
508
509 uids = realloc(rules->uids, (rules->uids_max + add ) * sizeof(struct uid_gid));
510 if (uids == NULL)
511 return uid;
912541b0
KS		 512 rules->uids = uids;
513 rules->uids_max += add;
514 }
515 rules->uids[rules->uids_cur].uid = uid;
915bf0f6 516 off = rules_add_string(rules, owner);
912541b0
KS		 517 if (off <= 0)
518 return uid;
519 rules->uids[rules->uids_cur].name_off = off;
520 rules->uids_cur++;
521 return uid;
154a7b84
KS		 522}
523
9ec6e95b 524static gid_t add_gid(struct udev_rules *rules, const char *group) {
912541b0 525 unsigned int i;
23bf8dd7 526 gid_t gid = 0;
912541b0 527 unsigned int off;
23bf8dd7 528 int r;
912541b0
KS		 529
530 /* lookup, if we know it already */
531 for (i = 0; i < rules->gids_cur; i++) {
532 off = rules->gids[i].name_off;
915bf0f6 533 if (streq(rules_str(rules, off), group)) {
912541b0 534 gid = rules->gids[i].gid;
912541b0
KS		 535 return gid;
536 }
537 }
23bf8dd7
TG		 538 r = get_group_creds(&group, &gid);
539 if (r < 0) {
540 if (r == -ENOENT || r == -ESRCH)
ff49bc32 541 log_error("specified group '%s' unknown", group);
23bf8dd7 542 else
279d3c9c 543 log_error_errno(r, "error resolving group '%s': %m", group);
23bf8dd7 544 }
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 */
582 if (key[0] == '#' || key[0] == '\0')
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 */
616 if (val[0] == '"' || val[0] == '\'') {
617 if (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
706 for (dent = readdir(dir); dent != NULL; dent = readdir(dir))
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;
721
722 linepos = *line;
723 if (linepos == NULL || linepos[0] == '\0')
724 return -1;
725
726 /* skip whitespace */
727 while (isspace(linepos[0]) || linepos[0] == ',')
728 linepos++;
729
730 /* get the key */
731 if (linepos[0] == '\0')
732 return -1;
733 *key = linepos;
734
735 for (;;) {
736 linepos++;
737 if (linepos[0] == '\0')
738 return -1;
739 if (isspace(linepos[0]))
740 break;
741 if (linepos[0] == '=')
742 break;
8e3ba377 743 if ((linepos[0] == '+') || (linepos[0] == '-') || (linepos[0] == '!') || (linepos[0] == ':'))
912541b0
KS		 744 if (linepos[1] == '=')
745 break;
746 }
747
748 /* remember end of key */
749 temp = linepos;
750
751 /* skip whitespace after key */
752 while (isspace(linepos[0]))
753 linepos++;
754 if (linepos[0] == '\0')
755 return -1;
756
757 /* get operation type */
758 if (linepos[0] == '=' && linepos[1] == '=') {
759 *op = OP_MATCH;
760 linepos += 2;
761 } else if (linepos[0] == '!' && linepos[1] == '=') {
762 *op = OP_NOMATCH;
763 linepos += 2;
764 } else if (linepos[0] == '+' && linepos[1] == '=') {
765 *op = OP_ADD;
766 linepos += 2;
8e3ba377
DH		 767 } else if (linepos[0] == '-' && linepos[1] == '=') {
768 *op = OP_REMOVE;
769 linepos += 2;
912541b0
KS		 770 } else if (linepos[0] == '=') {
771 *op = OP_ASSIGN;
772 linepos++;
773 } else if (linepos[0] == ':' && linepos[1] == '=') {
774 *op = OP_ASSIGN_FINAL;
775 linepos += 2;
776 } else
777 return -1;
778
779 /* terminate key */
780 temp[0] = '\0';
781
782 /* skip whitespace after operator */
783 while (isspace(linepos[0]))
784 linepos++;
785 if (linepos[0] == '\0')
786 return -1;
787
788 /* get the value */
789 if (linepos[0] == '"')
790 linepos++;
791 else
792 return -1;
793 *value = linepos;
794
795 /* terminate */
796 temp = strchr(linepos, '"');
797 if (!temp)
798 return -1;
799 temp[0] = '\0';
800 temp++;
912541b0
KS		 801
802 /* move line to next key */
803 *line = temp;
804 return 0;
6880b25d 805}
95776dc6 806
6880b25d 807/* extract possible KEY{attr} */
9ec6e95b 808static const char *get_key_attribute(struct udev *udev, char *str) {
912541b0
KS		 809 char *pos;
810 char *attr;
811
812 attr = strchr(str, '{');
813 if (attr != NULL) {
814 attr++;
815 pos = strchr(attr, '}');
816 if (pos == NULL) {
9f6445e3 817 log_error("missing closing brace for format");
912541b0
KS		 818 return NULL;
819 }
820 pos[0] = '\0';
912541b0
KS		 821 return attr;
822 }
823 return NULL;
6880b25d 824}
95776dc6 825
19a8e656
ZJS		 826static void rule_add_key(struct rule_tmp *rule_tmp, enum token_type type,
827 enum operation_type op,
828 const char *value, const void *data) {
829 struct token *token = rule_tmp->token + rule_tmp->token_cur;
912541b0
KS		 830 const char *attr = NULL;
831
19a8e656 832 assert(rule_tmp->token_cur < ELEMENTSOF(rule_tmp->token));
29804cc1 833 memzero(token, sizeof(struct token));
912541b0
KS		 834
835 switch (type) {
836 case TK_M_ACTION:
837 case TK_M_DEVPATH:
838 case TK_M_KERNEL:
839 case TK_M_SUBSYSTEM:
840 case TK_M_DRIVER:
841 case TK_M_WAITFOR:
842 case TK_M_DEVLINK:
843 case TK_M_NAME:
844 case TK_M_KERNELS:
845 case TK_M_SUBSYSTEMS:
846 case TK_M_DRIVERS:
847 case TK_M_TAGS:
848 case TK_M_PROGRAM:
849 case TK_M_IMPORT_FILE:
850 case TK_M_IMPORT_PROG:
851 case TK_M_IMPORT_DB:
852 case TK_M_IMPORT_CMDLINE:
853 case TK_M_IMPORT_PARENT:
854 case TK_M_RESULT:
855 case TK_A_OWNER:
856 case TK_A_GROUP:
857 case TK_A_MODE:
8a173387 858 case TK_A_DEVLINK:
912541b0
KS		 859 case TK_A_NAME:
860 case TK_A_GOTO:
861 case TK_M_TAG:
862 case TK_A_TAG:
d6f116a7 863 case TK_A_STATIC_NODE:
915bf0f6 864 token->key.value_off = rules_add_string(rule_tmp->rules, value);
912541b0
KS		 865 break;
866 case TK_M_IMPORT_BUILTIN:
915bf0f6 867 token->key.value_off = rules_add_string(rule_tmp->rules, value);
912541b0
KS		 868 token->key.builtin_cmd = *(enum udev_builtin_cmd *)data;
869 break;
870 case TK_M_ENV:
871 case TK_M_ATTR:
f4cf2e5b 872 case TK_M_SYSCTL:
912541b0
KS		 873 case TK_M_ATTRS:
874 case TK_A_ATTR:
f4cf2e5b 875 case TK_A_SYSCTL:
912541b0 876 case TK_A_ENV:
c26547d6 877 case TK_A_SECLABEL:
912541b0 878 attr = data;
915bf0f6
KS		 879 token->key.value_off = rules_add_string(rule_tmp->rules, value);
880 token->key.attr_off = rules_add_string(rule_tmp->rules, attr);
912541b0 881 break;
912541b0 882 case TK_M_TEST:
915bf0f6 883 token->key.value_off = rules_add_string(rule_tmp->rules, value);
912541b0
KS		 884 if (data != NULL)
885 token->key.mode = *(mode_t *)data;
886 break;
887 case TK_A_STRING_ESCAPE_NONE:
888 case TK_A_STRING_ESCAPE_REPLACE:
889 case TK_A_DB_PERSIST:
890 break;
83cd6b75 891 case TK_A_RUN_BUILTIN:
83cd6b75 892 case TK_A_RUN_PROGRAM:
4590cfe4 893 token->key.builtin_cmd = *(enum udev_builtin_cmd *)data;
915bf0f6 894 token->key.value_off = rules_add_string(rule_tmp->rules, value);
912541b0
KS		 895 break;
896 case TK_A_INOTIFY_WATCH:
897 case TK_A_DEVLINK_PRIO:
898 token->key.devlink_prio = *(int *)data;
899 break;
900 case TK_A_OWNER_ID:
901 token->key.uid = *(uid_t *)data;
902 break;
903 case TK_A_GROUP_ID:
904 token->key.gid = *(gid_t *)data;
905 break;
906 case TK_A_MODE_ID:
907 token->key.mode = *(mode_t *)data;
908 break;
912541b0
KS		 909 case TK_RULE:
910 case TK_M_PARENTS_MIN:
911 case TK_M_PARENTS_MAX:
912 case TK_M_MAX:
913 case TK_END:
914 case TK_UNSET:
19a8e656 915 assert_not_reached("wrong type");
912541b0
KS		 916 }
917
918 if (value != NULL && type < TK_M_MAX) {
919 /* check if we need to split or call fnmatch() while matching rules */
920 enum string_glob_type glob;
921 int has_split;
922 int has_glob;
923
924 has_split = (strchr(value, '|') != NULL);
e3e0314b 925 has_glob = string_is_glob(value);
912541b0
KS		 926 if (has_split && has_glob) {
927 glob = GL_SPLIT_GLOB;
928 } else if (has_split) {
929 glob = GL_SPLIT;
930 } else if (has_glob) {
33502ffe 931 if (streq(value, "?*"))
912541b0
KS		 932 glob = GL_SOMETHING;
933 else
934 glob = GL_GLOB;
935 } else {
936 glob = GL_PLAIN;
937 }
938 token->key.glob = glob;
939 }
940
941 if (value != NULL && type > TK_M_MAX) {
942 /* check if assigned value has substitution chars */
943 if (value[0] == '[')
944 token->key.subst = SB_SUBSYS;
945 else if (strchr(value, '%') != NULL || strchr(value, '$') != NULL)
946 token->key.subst = SB_FORMAT;
947 else
948 token->key.subst = SB_NONE;
949 }
950
951 if (attr != NULL) {
d6f116a7 952 /* check if property/attribute name has substitution chars */
912541b0
KS		 953 if (attr[0] == '[')
954 token->key.attrsubst = SB_SUBSYS;
955 else if (strchr(attr, '%') != NULL || strchr(attr, '$') != NULL)
956 token->key.attrsubst = SB_FORMAT;
957 else
958 token->key.attrsubst = SB_NONE;
959 }
960
961 token->key.type = type;
962 token->key.op = op;
963 rule_tmp->token_cur++;
6880b25d 964}
e57e7bc1 965
9ec6e95b 966static int sort_token(struct udev_rules *rules, struct rule_tmp *rule_tmp) {
912541b0
KS		 967 unsigned int i;
968 unsigned int start = 0;
969 unsigned int end = rule_tmp->token_cur;
970
971 for (i = 0; i < rule_tmp->token_cur; i++) {
972 enum token_type next_val = TK_UNSET;
973 unsigned int next_idx = 0;
974 unsigned int j;
975
976 /* find smallest value */
977 for (j = start; j < end; j++) {
978 if (rule_tmp->token[j].type == TK_UNSET)
979 continue;
980 if (next_val == TK_UNSET || rule_tmp->token[j].type < next_val) {
981 next_val = rule_tmp->token[j].type;
982 next_idx = j;
983 }
984 }
985
986 /* add token and mark done */
987 if (add_token(rules, &rule_tmp->token[next_idx]) != 0)
988 return -1;
989 rule_tmp->token[next_idx].type = TK_UNSET;
990
991 /* shrink range */
992 if (next_idx == start)
993 start++;
994 if (next_idx+1 == end)
995 end--;
996 }
997 return 0;
724257d9
GKH		 998}
999
19a8e656
ZJS		 1000#define LOG_RULE_ERROR(fmt, ...) log_error("Invalid rule %s:%u: " fmt, filename, lineno, ##__VA_ARGS__)
1001#define LOG_RULE_WARNING(fmt, ...) log_warning("%s:%u: " fmt, filename, lineno, ##__VA_ARGS__)
1002#define LOG_RULE_DEBUG(fmt, ...) log_debug("%s:%u: " fmt, filename, lineno, ##__VA_ARGS__)
1003#define LOG_AND_RETURN(fmt, ...) { LOG_RULE_ERROR(fmt, __VA_ARGS__); return; }
1004
4fd6af76
ZJS		 1005static void add_rule(struct udev_rules *rules, char *line,
1006 const char *filename, unsigned int filename_off, unsigned int lineno) {
912541b0 1007 char *linepos;
04a9d3a0 1008 const char *attr;
84198c18
TG		 1009 struct rule_tmp rule_tmp = {
1010 .rules = rules,
1011 .rule.type = TK_RULE,
1012 };
912541b0 1013
775f8b3c
KS		 1014 /* the offset in the rule is limited to unsigned short */
1015 if (filename_off < USHRT_MAX)
1016 rule_tmp.rule.rule.filename_off = filename_off;
912541b0
KS		 1017 rule_tmp.rule.rule.filename_line = lineno;
1018
1019 linepos = line;
1020 for (;;) {
1021 char *key;
1022 char *value;
1023 enum operation_type op;
1024
e736cf35 1025 if (get_key(rules->udev, &linepos, &key, &op, &value) != 0) {
3cf0f8f7
DR		 1026 /* Avoid erroring on trailing whitespace. This is probably rare
1027 * so save the work for the error case instead of always trying
1028 * to strip the trailing whitespace with strstrip(). */
1029 while (isblank(*linepos))
1030 linepos++;
1031
e736cf35
DR		 1032 /* If we aren't at the end of the line, this is a parsing error.
1033 * Make a best effort to describe where the problem is. */
2783fe06 1034 if (!strchr(NEWLINE, *linepos)) {
6501b52d 1035 char buf[2] = {*linepos};
1291bc89
ZJS		 1036 _cleanup_free_ char *tmp;
1037
1038 tmp = cescape(buf);
ff49bc32 1039 log_error("invalid key/value pair in file %s on line %u, starting at character %tu ('%s')",
1291bc89 1040 filename, lineno, linepos - line + 1, tmp);
6501b52d 1041 if (*linepos == '#')
75716dd8 1042 log_error("hint: comments can only start at beginning of line");
1291bc89 1043 }
912541b0 1044 break;
e736cf35 1045 }
912541b0 1046
19a8e656
ZJS		 1047 if (rule_tmp.token_cur >= ELEMENTSOF(rule_tmp.token))
1048 LOG_AND_RETURN("temporary rule array too small, aborting event processing with %u items", rule_tmp.token_cur);
1049
33502ffe 1050 if (streq(key, "ACTION")) {
19a8e656
ZJS		 1051 if (op > OP_MATCH_MAX)
1052 LOG_AND_RETURN("invalid %s operation", key);
1053
912541b0 1054 rule_add_key(&rule_tmp, TK_M_ACTION, op, value, NULL);
912541b0 1055
99f16bb8 1056 } else if (streq(key, "DEVPATH")) {
19a8e656
ZJS		 1057 if (op > OP_MATCH_MAX)
1058 LOG_AND_RETURN("invalid %s operation", key);
1059
912541b0 1060 rule_add_key(&rule_tmp, TK_M_DEVPATH, op, value, NULL);
912541b0 1061
99f16bb8 1062 } else if (streq(key, "KERNEL")) {
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_KERNEL, op, value, NULL);
912541b0 1067
99f16bb8 1068 } else if (streq(key, "SUBSYSTEM")) {
19a8e656
ZJS		 1069 if (op > OP_MATCH_MAX)
1070 LOG_AND_RETURN("invalid %s operation", key);
1071
912541b0 1072 /* bus, class, subsystem events should all be the same */
99f16bb8
ZJS		 1073 if (STR_IN_SET(value, "subsystem", "bus", "class")) {
1074 if (!streq(value, "subsystem"))
19a8e656
ZJS		 1075 LOG_RULE_WARNING("'%s' must be specified as 'subsystem'; please fix", value);
1076
912541b0
KS		 1077 rule_add_key(&rule_tmp, TK_M_SUBSYSTEM, op, "subsystem|class|bus", NULL);
1078 } else
1079 rule_add_key(&rule_tmp, TK_M_SUBSYSTEM, op, value, NULL);
912541b0 1080
99f16bb8 1081 } else if (streq(key, "DRIVER")) {
19a8e656
ZJS		 1082 if (op > OP_MATCH_MAX)
1083 LOG_AND_RETURN("invalid %s operation", key);
1084
912541b0 1085 rule_add_key(&rule_tmp, TK_M_DRIVER, op, value, NULL);
912541b0 1086
99f16bb8 1087 } else if (startswith(key, "ATTR{")) {
f8294e41 1088 attr = get_key_attribute(rules->udev, key + strlen("ATTR"));
19a8e656
ZJS		 1089 if (attr == NULL)
1090 LOG_AND_RETURN("error parsing %s attribute", "ATTR");
1091
1092 if (op == OP_REMOVE)
1093 LOG_AND_RETURN("invalid %s operation", "ATTR");
1094
f4cf2e5b 1095 if (op < OP_MATCH_MAX)
912541b0 1096 rule_add_key(&rule_tmp, TK_M_ATTR, op, value, attr);
f4cf2e5b 1097 else
912541b0 1098 rule_add_key(&rule_tmp, TK_A_ATTR, op, value, attr);
f4cf2e5b 1099
99f16bb8 1100 } else if (startswith(key, "SYSCTL{")) {
f4cf2e5b 1101 attr = get_key_attribute(rules->udev, key + strlen("SYSCTL"));
19a8e656
ZJS		 1102 if (attr == NULL)
1103 LOG_AND_RETURN("error parsing %s attribute", "ATTR");
1104
1105 if (op == OP_REMOVE)
1106 LOG_AND_RETURN("invalid %s operation", "ATTR");
1107
f4cf2e5b
KS		 1108 if (op < OP_MATCH_MAX)
1109 rule_add_key(&rule_tmp, TK_M_SYSCTL, op, value, attr);
1110 else
1111 rule_add_key(&rule_tmp, TK_A_SYSCTL, op, value, attr);
912541b0 1112
99f16bb8 1113 } else if (startswith(key, "SECLABEL{")) {
f8294e41 1114 attr = get_key_attribute(rules->udev, key + strlen("SECLABEL"));
19a8e656
ZJS		 1115 if (attr == NULL)
1116 LOG_AND_RETURN("error parsing %s attribute", "SECLABEL");
1117
1118 if (op == OP_REMOVE)
1119 LOG_AND_RETURN("invalid %s operation", "SECLABEL");
c26547d6
KS		 1120
1121 rule_add_key(&rule_tmp, TK_A_SECLABEL, op, value, attr);
c26547d6 1122
99f16bb8 1123 } else if (streq(key, "KERNELS")) {
19a8e656
ZJS		 1124 if (op > OP_MATCH_MAX)
1125 LOG_AND_RETURN("invalid %s operation", key);
1126
912541b0 1127 rule_add_key(&rule_tmp, TK_M_KERNELS, op, value, NULL);
912541b0 1128
99f16bb8 1129 } else if (streq(key, "SUBSYSTEMS")) {
19a8e656
ZJS		 1130 if (op > OP_MATCH_MAX)
1131 LOG_AND_RETURN("invalid %s operation", key);
1132
912541b0 1133 rule_add_key(&rule_tmp, TK_M_SUBSYSTEMS, op, value, NULL);
912541b0 1134
99f16bb8 1135 } else if (streq(key, "DRIVERS")) {
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_DRIVERS, op, value, NULL);
912541b0 1140
99f16bb8 1141 } else if (startswith(key, "ATTRS{")) {
19a8e656
ZJS		 1142 if (op > OP_MATCH_MAX)
1143 LOG_AND_RETURN("invalid %s operation", "ATTRS");
1144
f8294e41 1145 attr = get_key_attribute(rules->udev, key + strlen("ATTRS"));
19a8e656
ZJS		 1146 if (attr == NULL)
1147 LOG_AND_RETURN("error parsing %s attribute", "ATTRS");
1148
33502ffe 1149 if (startswith(attr, "device/"))
19a8e656
ZJS		 1150 LOG_RULE_WARNING("'device' link may not be available in future kernels; please fix");
1151 if (strstr(attr, "../") != NULL)
1152 LOG_RULE_WARNING("direct reference to parent sysfs directory, may break in future kernels; please fix");
912541b0 1153 rule_add_key(&rule_tmp, TK_M_ATTRS, op, value, attr);
912541b0 1154
99f16bb8 1155 } else if (streq(key, "TAGS")) {
19a8e656
ZJS		 1156 if (op > OP_MATCH_MAX)
1157 LOG_AND_RETURN("invalid %s operation", key);
1158
912541b0 1159 rule_add_key(&rule_tmp, TK_M_TAGS, op, value, NULL);
912541b0 1160
99f16bb8 1161 } else if (startswith(key, "ENV{")) {
f8294e41 1162 attr = get_key_attribute(rules->udev, key + strlen("ENV"));
19a8e656
ZJS		 1163 if (attr == NULL)
1164 LOG_AND_RETURN("error parsing %s attribute", "ENV");
1165
1166 if (op == OP_REMOVE)
1167 LOG_AND_RETURN("invalid %s operation", "ENV");
1168
1169 if (op < OP_MATCH_MAX)
1170 rule_add_key(&rule_tmp, TK_M_ENV, op, value, attr);
1171 else {
99f16bb8
ZJS		 1172 if (STR_IN_SET(attr,
1173 "ACTION",
1174 "SUBSYSTEM",
1175 "DEVTYPE",
1176 "MAJOR",
1177 "MINOR",
1178 "DRIVER",
1179 "IFINDEX",
1180 "DEVNAME",
1181 "DEVLINKS",
1182 "DEVPATH",
19a8e656
ZJS		 1183 "TAGS"))
1184 LOG_AND_RETURN("invalid ENV attribute, '%s' cannot be set", attr);
1185
1186 rule_add_key(&rule_tmp, TK_A_ENV, op, value, attr);
912541b0 1187 }
912541b0 1188
99f16bb8 1189 } else if (streq(key, "TAG")) {
912541b0
KS		 1190 if (op < OP_MATCH_MAX)
1191 rule_add_key(&rule_tmp, TK_M_TAG, op, value, NULL);
1192 else
1193 rule_add_key(&rule_tmp, TK_A_TAG, op, value, NULL);
912541b0 1194
99f16bb8 1195 } else if (streq(key, "PROGRAM")) {
19a8e656
ZJS		 1196 if (op == OP_REMOVE)
1197 LOG_AND_RETURN("invalid %s operation", key);
1198
912541b0 1199 rule_add_key(&rule_tmp, TK_M_PROGRAM, op, value, NULL);
912541b0 1200
99f16bb8 1201 } else if (streq(key, "RESULT")) {
19a8e656
ZJS		 1202 if (op > OP_MATCH_MAX)
1203 LOG_AND_RETURN("invalid %s operation", key);
1204
912541b0 1205 rule_add_key(&rule_tmp, TK_M_RESULT, op, value, NULL);
912541b0 1206
99f16bb8 1207 } else if (startswith(key, "IMPORT")) {
f8294e41 1208 attr = get_key_attribute(rules->udev, key + strlen("IMPORT"));
912541b0 1209 if (attr == NULL) {
19a8e656 1210 LOG_RULE_WARNING("ignoring IMPORT{} with missing type");
912541b0
KS		 1211 continue;
1212 }
19a8e656
ZJS		 1213 if (op == OP_REMOVE)
1214 LOG_AND_RETURN("invalid %s operation", "IMPORT");
1215
33502ffe 1216 if (streq(attr, "program")) {
912541b0
KS		 1217 /* find known built-in command */
1218 if (value[0] != '/') {
19a8e656 1219 const enum udev_builtin_cmd cmd = udev_builtin_lookup(value);
912541b0 1220
912541b0 1221 if (cmd < UDEV_BUILTIN_MAX) {
19a8e656 1222 LOG_RULE_DEBUG("IMPORT found builtin '%s', replacing", value);
912541b0
KS		 1223 rule_add_key(&rule_tmp, TK_M_IMPORT_BUILTIN, op, value, &cmd);
1224 continue;
1225 }
1226 }
912541b0 1227 rule_add_key(&rule_tmp, TK_M_IMPORT_PROG, op, value, NULL);
33502ffe 1228 } else if (streq(attr, "builtin")) {
19a8e656 1229 const enum udev_builtin_cmd cmd = udev_builtin_lookup(value);
912541b0 1230
19a8e656
ZJS		 1231 if (cmd >= UDEV_BUILTIN_MAX)
1232 LOG_RULE_WARNING("IMPORT{builtin} '%s' unknown", value);
912541b0 1233 else
19a8e656
ZJS		 1234 rule_add_key(&rule_tmp, TK_M_IMPORT_BUILTIN, op, value, &cmd);
1235 } else if (streq(attr, "file"))
912541b0 1236 rule_add_key(&rule_tmp, TK_M_IMPORT_FILE, op, value, NULL);
19a8e656 1237 else if (streq(attr, "db"))
912541b0 1238 rule_add_key(&rule_tmp, TK_M_IMPORT_DB, op, value, NULL);
19a8e656 1239 else if (streq(attr, "cmdline"))
912541b0 1240 rule_add_key(&rule_tmp, TK_M_IMPORT_CMDLINE, op, value, NULL);
19a8e656 1241 else if (streq(attr, "parent"))
912541b0 1242 rule_add_key(&rule_tmp, TK_M_IMPORT_PARENT, op, value, NULL);
19a8e656
ZJS		 1243 else
1244 LOG_RULE_ERROR("ignoring unknown %s{} type '%s'", "IMPORT", attr);
912541b0 1245
99f16bb8 1246 } else if (startswith(key, "TEST")) {
912541b0
KS		 1247 mode_t mode = 0;
1248
19a8e656
ZJS		 1249 if (op > OP_MATCH_MAX)
1250 LOG_AND_RETURN("invalid %s operation", "TEST");
1251
f8294e41 1252 attr = get_key_attribute(rules->udev, key + strlen("TEST"));
912541b0
KS		 1253 if (attr != NULL) {
1254 mode = strtol(attr, NULL, 8);
1255 rule_add_key(&rule_tmp, TK_M_TEST, op, value, &mode);
99f16bb8 1256 } else
912541b0 1257 rule_add_key(&rule_tmp, TK_M_TEST, op, value, NULL);
912541b0 1258
99f16bb8 1259 } else if (startswith(key, "RUN")) {
f8294e41 1260 attr = get_key_attribute(rules->udev, key + strlen("RUN"));
83cd6b75
KS		 1261 if (attr == NULL)
1262 attr = "program";
19a8e656
ZJS		 1263 if (op == OP_REMOVE)
1264 LOG_AND_RETURN("invalid %s operation", "RUN");
83cd6b75 1265
33502ffe 1266 if (streq(attr, "builtin")) {
19a8e656 1267 const enum udev_builtin_cmd cmd = udev_builtin_lookup(value);
83cd6b75
KS		 1268
1269 if (cmd < UDEV_BUILTIN_MAX)
1270 rule_add_key(&rule_tmp, TK_A_RUN_BUILTIN, op, value, &cmd);
1271 else
19a8e656 1272 LOG_RULE_ERROR("RUN{builtin}: '%s' unknown", value);
33502ffe 1273 } else if (streq(attr, "program")) {
99f16bb8 1274 const enum udev_builtin_cmd cmd = UDEV_BUILTIN_MAX;
83cd6b75 1275
83cd6b75 1276 rule_add_key(&rule_tmp, TK_A_RUN_PROGRAM, op, value, &cmd);
99f16bb8 1277 } else
19a8e656 1278 LOG_RULE_ERROR("ignoring unknown %s{} type '%s'", "RUN", attr);
912541b0 1279
99f16bb8 1280 } else if (streq(key, "LABEL")) {
19a8e656
ZJS		 1281 if (op == OP_REMOVE)
1282 LOG_AND_RETURN("invalid %s operation", key);
1283
915bf0f6 1284 rule_tmp.rule.rule.label_off = rules_add_string(rules, value);
912541b0 1285
99f16bb8 1286 } else if (streq(key, "GOTO")) {
19a8e656
ZJS		 1287 if (op == OP_REMOVE)
1288 LOG_AND_RETURN("invalid %s operation", key);
1289
912541b0 1290 rule_add_key(&rule_tmp, TK_A_GOTO, 0, value, NULL);
912541b0 1291
99f16bb8 1292 } else if (startswith(key, "NAME")) {
19a8e656
ZJS		 1293 if (op == OP_REMOVE)
1294 LOG_AND_RETURN("invalid %s operation", key);
1295
1296 if (op < OP_MATCH_MAX)
912541b0 1297 rule_add_key(&rule_tmp, TK_M_NAME, op, value, NULL);
19a8e656 1298 else {
33502ffe 1299 if (streq(value, "%k")) {
19a8e656 1300 LOG_RULE_WARNING("NAME=\"%%k\" is ignored, because it breaks kernel supplied names; please remove");
912541b0
KS		 1301 continue;
1302 }
19a8e656
ZJS		 1303 if (isempty(value)) {
1304 LOG_RULE_DEBUG("NAME=\"\" is ignored, because udev will not delete any device nodes; please remove");
912541b0
KS		 1305 continue;
1306 }
1307 rule_add_key(&rule_tmp, TK_A_NAME, op, value, NULL);
1308 }
1309 rule_tmp.rule.rule.can_set_name = true;
912541b0 1310
99f16bb8 1311 } else if (streq(key, "SYMLINK")) {
19a8e656
ZJS		 1312 if (op == OP_REMOVE)
1313 LOG_AND_RETURN("invalid %s operation", key);
1314
8a173387 1315 if (op < OP_MATCH_MAX)
912541b0 1316 rule_add_key(&rule_tmp, TK_M_DEVLINK, op, value, NULL);
8a173387
KS		 1317 else
1318 rule_add_key(&rule_tmp, TK_A_DEVLINK, op, value, NULL);
912541b0 1319 rule_tmp.rule.rule.can_set_name = true;
912541b0 1320
99f16bb8 1321 } else if (streq(key, "OWNER")) {
912541b0
KS		 1322 uid_t uid;
1323 char *endptr;
1324
19a8e656
ZJS		 1325 if (op == OP_REMOVE)
1326 LOG_AND_RETURN("invalid %s operation", key);
8e3ba377 1327
912541b0 1328 uid = strtoul(value, &endptr, 10);
19a8e656 1329 if (endptr[0] == '\0')
912541b0 1330 rule_add_key(&rule_tmp, TK_A_OWNER_ID, op, NULL, &uid);
19a8e656 1331 else if (rules->resolve_names > 0 && strchr("$%", value[0]) == NULL) {
912541b0
KS		 1332 uid = add_uid(rules, value);
1333 rule_add_key(&rule_tmp, TK_A_OWNER_ID, op, NULL, &uid);
1f6b4113 1334 } else if (rules->resolve_names >= 0)
912541b0 1335 rule_add_key(&rule_tmp, TK_A_OWNER, op, value, NULL);
1f6b4113 1336
912541b0 1337 rule_tmp.rule.rule.can_set_name = true;
912541b0 1338
99f16bb8 1339 } else if (streq(key, "GROUP")) {
912541b0
KS		 1340 gid_t gid;
1341 char *endptr;
1342
19a8e656
ZJS		 1343 if (op == OP_REMOVE)
1344 LOG_AND_RETURN("invalid %s operation", key);
8e3ba377 1345
912541b0 1346 gid = strtoul(value, &endptr, 10);
19a8e656 1347 if (endptr[0] == '\0')
912541b0 1348 rule_add_key(&rule_tmp, TK_A_GROUP_ID, op, NULL, &gid);
19a8e656 1349 else if ((rules->resolve_names > 0) && strchr("$%", value[0]) == NULL) {
912541b0
KS		 1350 gid = add_gid(rules, value);
1351 rule_add_key(&rule_tmp, TK_A_GROUP_ID, op, NULL, &gid);
1f6b4113 1352 } else if (rules->resolve_names >= 0)
912541b0 1353 rule_add_key(&rule_tmp, TK_A_GROUP, op, value, NULL);
1f6b4113 1354
912541b0 1355 rule_tmp.rule.rule.can_set_name = true;
912541b0 1356
99f16bb8 1357 } else if (streq(key, "MODE")) {
912541b0
KS		 1358 mode_t mode;
1359 char *endptr;
1360
19a8e656
ZJS		 1361 if (op == OP_REMOVE)
1362 LOG_AND_RETURN("invalid %s operation", key);
8e3ba377 1363
912541b0
KS		 1364 mode = strtol(value, &endptr, 8);
1365 if (endptr[0] == '\0')
1366 rule_add_key(&rule_tmp, TK_A_MODE_ID, op, NULL, &mode);
1367 else
1368 rule_add_key(&rule_tmp, TK_A_MODE, op, value, NULL);
1369 rule_tmp.rule.rule.can_set_name = true;
912541b0 1370
99f16bb8 1371 } else if (streq(key, "OPTIONS")) {
912541b0
KS		 1372 const char *pos;
1373
19a8e656
ZJS		 1374 if (op == OP_REMOVE)
1375 LOG_AND_RETURN("invalid %s operation", key);
8e3ba377 1376
912541b0
KS		 1377 pos = strstr(value, "link_priority=");
1378 if (pos != NULL) {
19a8e656 1379 int prio = atoi(pos + strlen("link_priority="));
912541b0
KS		 1380
1381 rule_add_key(&rule_tmp, TK_A_DEVLINK_PRIO, op, NULL, &prio);
912541b0
KS		 1382 }
1383
9f20a8a3 1384 pos = strstr(value, "string_escape=");
912541b0 1385 if (pos != NULL) {
19a8e656 1386 pos += strlen("string_escape=");
33502ffe 1387 if (startswith(pos, "none"))
912541b0 1388 rule_add_key(&rule_tmp, TK_A_STRING_ESCAPE_NONE, op, NULL, NULL);
33502ffe 1389 else if (startswith(pos, "replace"))
912541b0
KS		 1390 rule_add_key(&rule_tmp, TK_A_STRING_ESCAPE_REPLACE, op, NULL, NULL);
1391 }
1392
1393 pos = strstr(value, "db_persist");
1394 if (pos != NULL)
1395 rule_add_key(&rule_tmp, TK_A_DB_PERSIST, op, NULL, NULL);
1396
1397 pos = strstr(value, "nowatch");
1398 if (pos != NULL) {
1399 const int off = 0;
1400
1401 rule_add_key(&rule_tmp, TK_A_INOTIFY_WATCH, op, NULL, &off);
912541b0
KS		 1402 } else {
1403 pos = strstr(value, "watch");
1404 if (pos != NULL) {
1405 const int on = 1;
1406
1407 rule_add_key(&rule_tmp, TK_A_INOTIFY_WATCH, op, NULL, &on);
912541b0
KS		 1408 }
1409 }
1410
1411 pos = strstr(value, "static_node=");
1412 if (pos != NULL) {
19a8e656
ZJS		 1413 pos += strlen("static_node=");
1414 rule_add_key(&rule_tmp, TK_A_STATIC_NODE, op, pos, NULL);
912541b0
KS		 1415 rule_tmp.rule.rule.has_static_node = true;
1416 }
1417
19a8e656
ZJS		 1418 } else
1419 LOG_AND_RETURN("unknown key '%s'", key);
912541b0
KS		 1420 }
1421
19a8e656 1422 /* add rule token and sort tokens */
912541b0 1423 rule_tmp.rule.rule.token_count = 1 + rule_tmp.token_cur;
19a8e656
ZJS		 1424 if (add_token(rules, &rule_tmp.rule) != 0 || sort_token(rules, &rule_tmp) != 0)
1425 LOG_RULE_ERROR("failed to add rule token");
c7521974
KS		 1426}
1427
9ec6e95b 1428static int parse_file(struct udev_rules *rules, const char *filename) {
6c8aaf0c 1429 _cleanup_fclose_ FILE *f = NULL;
912541b0 1430 unsigned int first_token;
775f8b3c 1431 unsigned int filename_off;
912541b0
KS		 1432 char line[UTIL_LINE_SIZE];
1433 int line_nr = 0;
1434 unsigned int i;
1435
ed88bcfb
ZJS		 1436 f = fopen(filename, "re");
1437 if (!f) {
1438 if (errno == ENOENT)
1439 return 0;
1440 else
1441 return -errno;
775f8b3c 1442 }
912541b0 1443
ed88bcfb
ZJS		 1444 if (null_or_empty_fd(fileno(f))) {
1445 log_debug("Skipping empty file: %s", filename);
1446 return 0;
1447 } else
1448 log_debug("Reading rules file: %s", filename);
912541b0
KS		 1449
1450 first_token = rules->token_cur;
915bf0f6 1451 filename_off = rules_add_string(rules, filename);
912541b0
KS		 1452
1453 while (fgets(line, sizeof(line), f) != NULL) {
1454 char *key;
1455 size_t len;
1456
1457 /* skip whitespace */
1458 line_nr++;
1459 key = line;
1460 while (isspace(key[0]))
1461 key++;
1462
1463 /* comment */
1464 if (key[0] == '#')
1465 continue;
1466
1467 len = strlen(line);
1468 if (len < 3)
1469 continue;
1470
1471 /* continue reading if backslash+newline is found */
1472 while (line[len-2] == '\\') {
1473 if (fgets(&line[len-2], (sizeof(line)-len)+2, f) == NULL)
1474 break;
1475 if (strlen(&line[len-2]) < 2)
1476 break;
1477 line_nr++;
1478 len = strlen(line);
1479 }
1480
1481 if (len+1 >= sizeof(line)) {
9f6445e3 1482 log_error("line too long '%s':%u, ignored", filename, line_nr);
912541b0
KS		 1483 continue;
1484 }
1485 add_rule(rules, key, filename, filename_off, line_nr);
1486 }
912541b0
KS		 1487
1488 /* link GOTOs to LABEL rules in this file to be able to fast-forward */
1489 for (i = first_token+1; i < rules->token_cur; i++) {
1490 if (rules->tokens[i].type == TK_A_GOTO) {
915bf0f6 1491 char *label = rules_str(rules, rules->tokens[i].key.value_off);
912541b0
KS		 1492 unsigned int j;
1493
1494 for (j = i+1; j < rules->token_cur; j++) {
1495 if (rules->tokens[j].type != TK_RULE)
1496 continue;
1497 if (rules->tokens[j].rule.label_off == 0)
1498 continue;
915bf0f6 1499 if (!streq(label, rules_str(rules, rules->tokens[j].rule.label_off)))
912541b0
KS		 1500 continue;
1501 rules->tokens[i].key.rule_goto = j;
1502 break;
1503 }
1504 if (rules->tokens[i].key.rule_goto == 0)
9f6445e3 1505 log_error("GOTO '%s' has no matching label in: '%s'", label, filename);
912541b0
KS		 1506 }
1507 }
1508 return 0;
c7521974
KS		 1509}
1510
9ec6e95b 1511struct udev_rules *udev_rules_new(struct udev *udev, int resolve_names) {
912541b0
KS		 1512 struct udev_rules *rules;
1513 struct udev_list file_list;
912541b0 1514 struct token end_token;
775f8b3c
KS		 1515 char **files, **f;
1516 int r;
912541b0 1517
955d98c9 1518 rules = new0(struct udev_rules, 1);
912541b0
KS		 1519 if (rules == NULL)
1520 return NULL;
1521 rules->udev = udev;
1522 rules->resolve_names = resolve_names;
1523 udev_list_init(udev, &file_list, true);
1524
1525 /* init token array and string buffer */
1526 rules->tokens = malloc(PREALLOC_TOKEN * sizeof(struct token));
0820a4f0
VP		 1527 if (rules->tokens == NULL)
1528 return udev_rules_unref(rules);
912541b0
KS		 1529 rules->token_max = PREALLOC_TOKEN;
1530
915bf0f6
KS		 1531 rules->strbuf = strbuf_new();
1532 if (!rules->strbuf)
0820a4f0
VP		 1533 return udev_rules_unref(rules);
1534
3b8c1cb0
KS		 1535 udev_rules_check_timestamp(rules);
1536
2ad8416d 1537 r = conf_files_list_strv(&files, ".rules", NULL, rules_dirs);
775f8b3c 1538 if (r < 0) {
da927ba9 1539 log_error_errno(r, "failed to enumerate rules files: %m");
0820a4f0 1540 return udev_rules_unref(rules);
912541b0
KS		 1541 }
1542
775f8b3c
KS		 1543 /*
1544 * The offset value in the rules strct is limited; add all
1545 * rules file names to the beginning of the string buffer.
1546 */
1547 STRV_FOREACH(f, files)
915bf0f6 1548 rules_add_string(rules, *f);
912541b0 1549
775f8b3c
KS		 1550 STRV_FOREACH(f, files)
1551 parse_file(rules, *f);
1552
1553 strv_free(files);
912541b0 1554
29804cc1 1555 memzero(&end_token, sizeof(struct token));
912541b0
KS		 1556 end_token.type = TK_END;
1557 add_token(rules, &end_token);
9f6445e3 1558 log_debug("rules contain %zu bytes tokens (%u * %zu bytes), %zu bytes strings",
915bf0f6 1559 rules->token_max * sizeof(struct token), rules->token_max, sizeof(struct token), rules->strbuf->len);
912541b0 1560
915bf0f6 1561 /* cleanup temporary strbuf data */
9f6445e3 1562 log_debug("%zu strings (%zu bytes), %zu de-duplicated (%zu bytes), %zu trie nodes used",
915bf0f6
KS		 1563 rules->strbuf->in_count, rules->strbuf->in_len,
1564 rules->strbuf->dedup_count, rules->strbuf->dedup_len, rules->strbuf->nodes_count);
1565 strbuf_complete(rules->strbuf);
912541b0
KS		 1566
1567 /* cleanup uid/gid cache */
a1e58e8e 1568 rules->uids = mfree(rules->uids);
912541b0
KS		 1569 rules->uids_cur = 0;
1570 rules->uids_max = 0;
a1e58e8e 1571 rules->gids = mfree(rules->gids);
912541b0
KS		 1572 rules->gids_cur = 0;
1573 rules->gids_max = 0;
1574
1575 dump_rules(rules);
1576 return rules;
c7521974
KS		 1577}
1578
9ec6e95b 1579struct udev_rules *udev_rules_unref(struct udev_rules *rules) {
912541b0
KS		 1580 if (rules == NULL)
1581 return NULL;
1582 free(rules->tokens);
915bf0f6 1583 strbuf_cleanup(rules->strbuf);
912541b0
KS		 1584 free(rules->uids);
1585 free(rules->gids);
1586 free(rules);
1587 return NULL;
c7521974 1588}
6880b25d 1589
9ec6e95b 1590bool udev_rules_check_timestamp(struct udev_rules *rules) {
5c11fbe3
KS		 1591 if (!rules)
1592 return false;
1593
2ad8416d 1594 return paths_check_timestamp(rules_dirs, &rules->dirs_ts_usec, true);
6ada823a
KS		 1595}
1596
9ec6e95b 1597static int match_key(struct udev_rules *rules, struct token *token, const char *val) {
915bf0f6 1598 char *key_value = rules_str(rules, token->key.value_off);
912541b0
KS		 1599 char *pos;
1600 bool match = false;
1601
1602 if (val == NULL)
1603 val = "";
1604
1605 switch (token->key.glob) {
1606 case GL_PLAIN:
33502ffe 1607 match = (streq(key_value, val));
912541b0
KS		 1608 break;
1609 case GL_GLOB:
1610 match = (fnmatch(key_value, val, 0) == 0);
1611 break;
1612 case GL_SPLIT:
1613 {
33502ffe 1614 const char *s;
912541b0
KS		 1615 size_t len;
1616
915bf0f6 1617 s = rules_str(rules, token->key.value_off);
912541b0
KS		 1618 len = strlen(val);
1619 for (;;) {
1620 const char *next;
1621
33502ffe 1622 next = strchr(s, '|');
912541b0 1623 if (next != NULL) {
33502ffe 1624 size_t matchlen = (size_t)(next - s);
912541b0 1625
641906e9 1626 match = (matchlen == len && strneq(s, val, matchlen));
912541b0
KS		 1627 if (match)
1628 break;
1629 } else {
33502ffe 1630 match = (streq(s, val));
912541b0
KS		 1631 break;
1632 }
33502ffe 1633 s = &next[1];
912541b0
KS		 1634 }
1635 break;
1636 }
1637 case GL_SPLIT_GLOB:
1638 {
1639 char value[UTIL_PATH_SIZE];
1640
d5a89d7d 1641 strscpy(value, sizeof(value), rules_str(rules, token->key.value_off));
912541b0
KS		 1642 key_value = value;
1643 while (key_value != NULL) {
1644 pos = strchr(key_value, '|');
1645 if (pos != NULL) {
1646 pos[0] = '\0';
1647 pos = &pos[1];
1648 }
912541b0
KS		 1649 match = (fnmatch(key_value, val, 0) == 0);
1650 if (match)
1651 break;
1652 key_value = pos;
1653 }
1654 break;
1655 }
1656 case GL_SOMETHING:
1657 match = (val[0] != '\0');
1658 break;
1659 case GL_UNSET:
1660 return -1;
1661 }
1662
baa30fbc 1663 if (match && (token->key.op == OP_MATCH))
912541b0 1664 return 0;
baa30fbc 1665 if (!match && (token->key.op == OP_NOMATCH))
912541b0 1666 return 0;
912541b0 1667 return -1;
6880b25d
KS		 1668}
1669
9ec6e95b 1670static int match_attr(struct udev_rules *rules, struct udev_device *dev, struct udev_event *event, struct token *cur) {
912541b0
KS		 1671 const char *name;
1672 char nbuf[UTIL_NAME_SIZE];
1673 const char *value;
1674 char vbuf[UTIL_NAME_SIZE];
1675 size_t len;
1676
915bf0f6 1677 name = rules_str(rules, cur->key.attr_off);
912541b0
KS		 1678 switch (cur->key.attrsubst) {
1679 case SB_FORMAT:
1680 udev_event_apply_format(event, name, nbuf, sizeof(nbuf));
1681 name = nbuf;
1682 /* fall through */
1683 case SB_NONE:
1684 value = udev_device_get_sysattr_value(dev, name);
1685 if (value == NULL)
1686 return -1;
1687 break;
1688 case SB_SUBSYS:
1689 if (util_resolve_subsys_kernel(event->udev, name, vbuf, sizeof(vbuf), 1) != 0)
1690 return -1;
1691 value = vbuf;
1692 break;
1693 default:
1694 return -1;
1695 }
1696
1697 /* remove trailing whitespace, if not asked to match for it */
1698 len = strlen(value);
1699 if (len > 0 && isspace(value[len-1])) {
1700 const char *key_value;
1701 size_t klen;
1702
915bf0f6 1703 key_value = rules_str(rules, cur->key.value_off);
912541b0
KS		 1704 klen = strlen(key_value);
1705 if (klen > 0 && !isspace(key_value[klen-1])) {
1706 if (value != vbuf) {
d5a89d7d 1707 strscpy(vbuf, sizeof(vbuf), value);
912541b0
KS		 1708 value = vbuf;
1709 }
1710 while (len > 0 && isspace(vbuf[--len]))
1711 vbuf[len] = '\0';
912541b0
KS		 1712 }
1713 }
1714
1715 return match_key(rules, cur, value);
6880b25d
KS		 1716}
1717
1718enum escape_type {
912541b0
KS		 1719 ESCAPE_UNSET,
1720 ESCAPE_NONE,
1721 ESCAPE_REPLACE,
6880b25d
KS		 1722};
1723
4fd6af76
ZJS		 1724void udev_rules_apply_to_event(struct udev_rules *rules,
1725 struct udev_event *event,
1726 usec_t timeout_usec,
1727 usec_t timeout_warn_usec,
1728 struct udev_list *properties_list) {
912541b0
KS		 1729 struct token *cur;
1730 struct token *rule;
1731 enum escape_type esc = ESCAPE_UNSET;
1732 bool can_set_name;
1733
1734 if (rules->tokens == NULL)
4fd6af76 1735 return;
912541b0 1736
33502ffe 1737 can_set_name = ((!streq(udev_device_get_action(event->dev), "remove")) &&
912541b0
KS		 1738 (major(udev_device_get_devnum(event->dev)) > 0 ||
1739 udev_device_get_ifindex(event->dev) > 0));
1740
1741 /* loop through token list, match, run actions or forward to next rule */
1742 cur = &rules->tokens[0];
1743 rule = cur;
1744 for (;;) {
1745 dump_token(rules, cur);
1746 switch (cur->type) {
1747 case TK_RULE:
1748 /* current rule */
1749 rule = cur;
1750 /* possibly skip rules which want to set NAME, SYMLINK, OWNER, GROUP, MODE */
1751 if (!can_set_name && rule->rule.can_set_name)
1752 goto nomatch;
1753 esc = ESCAPE_UNSET;
1754 break;
1755 case TK_M_ACTION:
1756 if (match_key(rules, cur, udev_device_get_action(event->dev)) != 0)
1757 goto nomatch;
1758 break;
1759 case TK_M_DEVPATH:
1760 if (match_key(rules, cur, udev_device_get_devpath(event->dev)) != 0)
1761 goto nomatch;
1762 break;
1763 case TK_M_KERNEL:
1764 if (match_key(rules, cur, udev_device_get_sysname(event->dev)) != 0)
1765 goto nomatch;
1766 break;
1767 case TK_M_DEVLINK: {
912541b0
KS		 1768 struct udev_list_entry *list_entry;
1769 bool match = false;
1770
1771 udev_list_entry_foreach(list_entry, udev_device_get_devlinks_list_entry(event->dev)) {
1772 const char *devlink;
1773
920b52e4 1774 devlink = udev_list_entry_get_name(list_entry) + strlen("/dev/");
912541b0
KS		 1775 if (match_key(rules, cur, devlink) == 0) {
1776 match = true;
1777 break;
1778 }
1779 }
1780 if (!match)
1781 goto nomatch;
1782 break;
1783 }
1784 case TK_M_NAME:
1785 if (match_key(rules, cur, event->name) != 0)
1786 goto nomatch;
1787 break;
1788 case TK_M_ENV: {
915bf0f6 1789 const char *key_name = rules_str(rules, cur->key.attr_off);
912541b0
KS		 1790 const char *value;
1791
1792 value = udev_device_get_property_value(event->dev, key_name);
adeba500
KS		 1793
1794 /* check global properties */
1795 if (!value && properties_list) {
1796 struct udev_list_entry *list_entry;
1797
1798 list_entry = udev_list_get_entry(properties_list);
1799 list_entry = udev_list_entry_get_by_name(list_entry, key_name);
1800 if (list_entry != NULL)
1801 value = udev_list_entry_get_value(list_entry);
1802 }
1803
1804 if (!value)
912541b0 1805 value = "";
912541b0
KS		 1806 if (match_key(rules, cur, value))
1807 goto nomatch;
1808 break;
1809 }
1810 case TK_M_TAG: {
1811 struct udev_list_entry *list_entry;
1812 bool match = false;
1813
1814 udev_list_entry_foreach(list_entry, udev_device_get_tags_list_entry(event->dev)) {
915bf0f6 1815 if (streq(rules_str(rules, cur->key.value_off), udev_list_entry_get_name(list_entry))) {
912541b0
KS		 1816 match = true;
1817 break;
1818 }
1819 }
4302857b
FF		 1820 if ((!match && (cur->key.op != OP_NOMATCH)) ||
1821 (match && (cur->key.op == OP_NOMATCH)))
912541b0
KS		 1822 goto nomatch;
1823 break;
1824 }
1825 case TK_M_SUBSYSTEM:
1826 if (match_key(rules, cur, udev_device_get_subsystem(event->dev)) != 0)
1827 goto nomatch;
1828 break;
1829 case TK_M_DRIVER:
1830 if (match_key(rules, cur, udev_device_get_driver(event->dev)) != 0)
1831 goto nomatch;
1832 break;
912541b0
KS		 1833 case TK_M_ATTR:
1834 if (match_attr(rules, event->dev, event, cur) != 0)
1835 goto nomatch;
1836 break;
f4cf2e5b
KS		 1837 case TK_M_SYSCTL: {
1838 char filename[UTIL_PATH_SIZE];
1839 _cleanup_free_ char *value = NULL;
1840 size_t len;
1841
1842 udev_event_apply_format(event, rules_str(rules, cur->key.attr_off), filename, sizeof(filename));
1843 sysctl_normalize(filename);
1844 if (sysctl_read(filename, &value) < 0)
1845 goto nomatch;
1846
1847 len = strlen(value);
1848 while (len > 0 && isspace(value[--len]))
1849 value[len] = '\0';
1850 if (match_key(rules, cur, value) != 0)
1851 goto nomatch;
1852 break;
1853 }
912541b0
KS		 1854 case TK_M_KERNELS:
1855 case TK_M_SUBSYSTEMS:
1856 case TK_M_DRIVERS:
1857 case TK_M_ATTRS:
1858 case TK_M_TAGS: {
1859 struct token *next;
1860
1861 /* get whole sequence of parent matches */
1862 next = cur;
1863 while (next->type > TK_M_PARENTS_MIN && next->type < TK_M_PARENTS_MAX)
1864 next++;
1865
1866 /* loop over parents */
1867 event->dev_parent = event->dev;
1868 for (;;) {
1869 struct token *key;
1870
912541b0
KS		 1871 /* loop over sequence of parent match keys */
1872 for (key = cur; key < next; key++ ) {
1873 dump_token(rules, key);
1874 switch(key->type) {
1875 case TK_M_KERNELS:
1876 if (match_key(rules, key, udev_device_get_sysname(event->dev_parent)) != 0)
1877 goto try_parent;
1878 break;
1879 case TK_M_SUBSYSTEMS:
1880 if (match_key(rules, key, udev_device_get_subsystem(event->dev_parent)) != 0)
1881 goto try_parent;
1882 break;
1883 case TK_M_DRIVERS:
1884 if (match_key(rules, key, udev_device_get_driver(event->dev_parent)) != 0)
1885 goto try_parent;
1886 break;
1887 case TK_M_ATTRS:
1888 if (match_attr(rules, event->dev_parent, event, key) != 0)
1889 goto try_parent;
1890 break;
1891 case TK_M_TAGS: {
915bf0f6 1892 bool match = udev_device_has_tag(event->dev_parent, rules_str(rules, cur->key.value_off));
912541b0
KS		 1893
1894 if (match && key->key.op == OP_NOMATCH)
1895 goto try_parent;
1896 if (!match && key->key.op == OP_MATCH)
1897 goto try_parent;
1898 break;
1899 }
1900 default:
1901 goto nomatch;
1902 }
912541b0 1903 }
912541b0
KS		 1904 break;
1905
1906 try_parent:
1907 event->dev_parent = udev_device_get_parent(event->dev_parent);
1908 if (event->dev_parent == NULL)
1909 goto nomatch;
1910 }
1911 /* move behind our sequence of parent match keys */
1912 cur = next;
1913 continue;
1914 }
1915 case TK_M_TEST: {
1916 char filename[UTIL_PATH_SIZE];
1917 struct stat statbuf;
1918 int match;
1919
915bf0f6 1920 udev_event_apply_format(event, rules_str(rules, cur->key.value_off), filename, sizeof(filename));
912541b0
KS		 1921 if (util_resolve_subsys_kernel(event->udev, filename, filename, sizeof(filename), 0) != 0) {
1922 if (filename[0] != '/') {
1923 char tmp[UTIL_PATH_SIZE];
1924
d5a89d7d
KS		 1925 strscpy(tmp, sizeof(tmp), filename);
1926 strscpyl(filename, sizeof(filename),
912541b0
KS		 1927 udev_device_get_syspath(event->dev), "/", tmp, NULL);
1928 }
1929 }
1930 attr_subst_subdir(filename, sizeof(filename));
1931
1932 match = (stat(filename, &statbuf) == 0);
baa30fbc 1933 if (match && cur->key.mode > 0)
912541b0 1934 match = ((statbuf.st_mode & cur->key.mode) > 0);
912541b0
KS		 1935 if (match && cur->key.op == OP_NOMATCH)
1936 goto nomatch;
1937 if (!match && cur->key.op == OP_MATCH)
1938 goto nomatch;
1939 break;
1940 }
912541b0
KS		 1941 case TK_M_PROGRAM: {
1942 char program[UTIL_PATH_SIZE];
209b031e 1943 char result[UTIL_LINE_SIZE];
912541b0 1944
a1e58e8e 1945 event->program_result = mfree(event->program_result);
915bf0f6 1946 udev_event_apply_format(event, rules_str(rules, cur->key.value_off), program, sizeof(program));
9f6445e3 1947 log_debug("PROGRAM '%s' %s:%u",
baa30fbc 1948 program,
915bf0f6 1949 rules_str(rules, rule->rule.filename_off),
baa30fbc 1950 rule->rule.filename_line);
912541b0 1951
bbf35206 1952 if (udev_event_spawn(event, timeout_usec, timeout_warn_usec, true, program, result, sizeof(result)) < 0) {
912541b0
KS		 1953 if (cur->key.op != OP_NOMATCH)
1954 goto nomatch;
1955 } else {
1956 int count;
1957
1958 util_remove_trailing_chars(result, '\n');
1959 if (esc == ESCAPE_UNSET || esc == ESCAPE_REPLACE) {
1960 count = util_replace_chars(result, UDEV_ALLOWED_CHARS_INPUT);
1961 if (count > 0)
9f6445e3 1962 log_debug("%i character(s) replaced" , count);
912541b0
KS		 1963 }
1964 event->program_result = strdup(result);
912541b0
KS		 1965 if (cur->key.op == OP_NOMATCH)
1966 goto nomatch;
1967 }
1968 break;
1969 }
1970 case TK_M_IMPORT_FILE: {
1971 char import[UTIL_PATH_SIZE];
1972
915bf0f6 1973 udev_event_apply_format(event, rules_str(rules, cur->key.value_off), import, sizeof(import));
912541b0
KS		 1974 if (import_file_into_properties(event->dev, import) != 0)
1975 if (cur->key.op != OP_NOMATCH)
1976 goto nomatch;
1977 break;
1978 }
1979 case TK_M_IMPORT_PROG: {
1980 char import[UTIL_PATH_SIZE];
1981
915bf0f6 1982 udev_event_apply_format(event, rules_str(rules, cur->key.value_off), import, sizeof(import));
9f6445e3 1983 log_debug("IMPORT '%s' %s:%u",
baa30fbc 1984 import,
915bf0f6 1985 rules_str(rules, rule->rule.filename_off),
baa30fbc 1986 rule->rule.filename_line);
912541b0 1987
8314de1d 1988 if (import_program_into_properties(event, timeout_usec, timeout_warn_usec, import) != 0)
912541b0
KS		 1989 if (cur->key.op != OP_NOMATCH)
1990 goto nomatch;
1991 break;
1992 }
1993 case TK_M_IMPORT_BUILTIN: {
1994 char command[UTIL_PATH_SIZE];
1995
1996 if (udev_builtin_run_once(cur->key.builtin_cmd)) {
1997 /* check if we ran already */
1998 if (event->builtin_run & (1 << cur->key.builtin_cmd)) {
9f6445e3 1999 log_debug("IMPORT builtin skip '%s' %s:%u",
baa30fbc 2000 udev_builtin_name(cur->key.builtin_cmd),
915bf0f6 2001 rules_str(rules, rule->rule.filename_off),
baa30fbc 2002 rule->rule.filename_line);
912541b0
KS		 2003 /* return the result from earlier run */
2004 if (event->builtin_ret & (1 << cur->key.builtin_cmd))
7d6884b6 2005 if (cur->key.op != OP_NOMATCH)
912541b0
KS		 2006 goto nomatch;
2007 break;
2008 }
2009 /* mark as ran */
2010 event->builtin_run |= (1 << cur->key.builtin_cmd);
2011 }
2012
915bf0f6 2013 udev_event_apply_format(event, rules_str(rules, cur->key.value_off), command, sizeof(command));
9f6445e3 2014 log_debug("IMPORT builtin '%s' %s:%u",
baa30fbc 2015 udev_builtin_name(cur->key.builtin_cmd),
915bf0f6 2016 rules_str(rules, rule->rule.filename_off),
baa30fbc 2017 rule->rule.filename_line);
912541b0
KS		 2018
2019 if (udev_builtin_run(event->dev, cur->key.builtin_cmd, command, false) != 0) {
2020 /* remember failure */
9f6445e3 2021 log_debug("IMPORT builtin '%s' returned non-zero",
baa30fbc 2022 udev_builtin_name(cur->key.builtin_cmd));
912541b0
KS		 2023 event->builtin_ret |= (1 << cur->key.builtin_cmd);
2024 if (cur->key.op != OP_NOMATCH)
2025 goto nomatch;
2026 }
2027 break;
2028 }
2029 case TK_M_IMPORT_DB: {
915bf0f6 2030 const char *key = rules_str(rules, cur->key.value_off);
912541b0
KS		 2031 const char *value;
2032
2033 value = udev_device_get_property_value(event->dev_db, key);
df546eb5
TG		 2034 if (value != NULL)
2035 udev_device_add_property(event->dev, key, value);
2036 else {
912541b0
KS		 2037 if (cur->key.op != OP_NOMATCH)
2038 goto nomatch;
2039 }
2040 break;
2041 }
2042 case TK_M_IMPORT_CMDLINE: {
fdd21be6 2043 _cleanup_fclose_ FILE *f = NULL;
912541b0
KS		 2044 bool imported = false;
2045
47ef94ac 2046 f = fopen("/proc/cmdline", "re");
912541b0
KS		 2047 if (f != NULL) {
2048 char cmdline[4096];
2049
2050 if (fgets(cmdline, sizeof(cmdline), f) != NULL) {
915bf0f6 2051 const char *key = rules_str(rules, cur->key.value_off);
912541b0
KS		 2052 char *pos;
2053
2054 pos = strstr(cmdline, key);
2055 if (pos != NULL) {
fdd21be6 2056 imported = true;
912541b0 2057 pos += strlen(key);
fdd21be6 2058 if (pos[0] == '\0' || isspace(pos[0]))
912541b0 2059 /* we import simple flags as 'FLAG=1' */
df546eb5 2060 udev_device_add_property(event->dev, key, "1");
fdd21be6 2061 else if (pos[0] == '=') {
912541b0
KS		 2062 const char *value;
2063
2064 pos++;
2065 value = pos;
2066 while (pos[0] != '\0' && !isspace(pos[0]))
2067 pos++;
2068 pos[0] = '\0';
df546eb5 2069 udev_device_add_property(event->dev, key, value);
912541b0
KS		 2070 }
2071 }
2072 }
912541b0
KS		 2073 }
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
915bf0f6 2081 udev_event_apply_format(event, rules_str(rules, cur->key.value_off), import, sizeof(import));
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
TG		 2112 const char *ow = owner;
2113 int r;
912541b0
KS		 2114
2115 if (event->owner_final)
2116 break;
2117 if (cur->key.op == OP_ASSIGN_FINAL)
2118 event->owner_final = true;
915bf0f6 2119 udev_event_apply_format(event, rules_str(rules, cur->key.value_off), owner, sizeof(owner));
1edefa4f 2120 event->owner_set = true;
23bf8dd7
TG		 2121 r = get_user_creds(&ow, &event->uid, NULL, NULL, NULL);
2122 if (r < 0) {
2123 if (r == -ENOENT || r == -ESRCH)
ff49bc32 2124 log_error("specified user '%s' unknown", owner);
23bf8dd7 2125 else
279d3c9c 2126 log_error_errno(r, "error resolving user '%s': %m", owner);
23bf8dd7
TG		 2127
2128 event->uid = 0;
2129 }
9f6445e3 2130 log_debug("OWNER %u %s:%u",
baa30fbc 2131 event->uid,
915bf0f6 2132 rules_str(rules, rule->rule.filename_off),
baa30fbc 2133 rule->rule.filename_line);
912541b0
KS		 2134 break;
2135 }
2136 case TK_A_GROUP: {
2137 char group[UTIL_NAME_SIZE];
23bf8dd7
TG		 2138 const char *gr = group;
2139 int r;
912541b0
KS		 2140
2141 if (event->group_final)
2142 break;
2143 if (cur->key.op == OP_ASSIGN_FINAL)
2144 event->group_final = true;
915bf0f6 2145 udev_event_apply_format(event, rules_str(rules, cur->key.value_off), group, sizeof(group));
1edefa4f 2146 event->group_set = true;
23bf8dd7
TG		 2147 r = get_group_creds(&gr, &event->gid);
2148 if (r < 0) {
2149 if (r == -ENOENT || r == -ESRCH)
ff49bc32 2150 log_error("specified group '%s' unknown", group);
23bf8dd7 2151 else
279d3c9c 2152 log_error_errno(r, "error resolving group '%s': %m", group);
23bf8dd7
TG		 2153
2154 event->gid = 0;
2155 }
9f6445e3 2156 log_debug("GROUP %u %s:%u",
baa30fbc 2157 event->gid,
915bf0f6 2158 rules_str(rules, rule->rule.filename_off),
baa30fbc 2159 rule->rule.filename_line);
912541b0
KS		 2160 break;
2161 }
2162 case TK_A_MODE: {
2163 char mode_str[UTIL_NAME_SIZE];
2164 mode_t mode;
2165 char *endptr;
2166
2167 if (event->mode_final)
2168 break;
915bf0f6 2169 udev_event_apply_format(event, rules_str(rules, cur->key.value_off), mode_str, sizeof(mode_str));
912541b0
KS		 2170 mode = strtol(mode_str, &endptr, 8);
2171 if (endptr[0] != '\0') {
9f6445e3 2172 log_error("ignoring invalid mode '%s'", mode_str);
912541b0
KS		 2173 break;
2174 }
2175 if (cur->key.op == OP_ASSIGN_FINAL)
2176 event->mode_final = true;
2177 event->mode_set = true;
2178 event->mode = mode;
9f6445e3 2179 log_debug("MODE %#o %s:%u",
baa30fbc 2180 event->mode,
915bf0f6 2181 rules_str(rules, rule->rule.filename_off),
baa30fbc 2182 rule->rule.filename_line);
912541b0
KS		 2183 break;
2184 }
2185 case TK_A_OWNER_ID:
2186 if (event->owner_final)
2187 break;
2188 if (cur->key.op == OP_ASSIGN_FINAL)
2189 event->owner_final = true;
1edefa4f 2190 event->owner_set = true;
912541b0 2191 event->uid = cur->key.uid;
9f6445e3 2192 log_debug("OWNER %u %s:%u",
baa30fbc 2193 event->uid,
915bf0f6 2194 rules_str(rules, rule->rule.filename_off),
baa30fbc 2195 rule->rule.filename_line);
912541b0
KS		 2196 break;
2197 case TK_A_GROUP_ID:
2198 if (event->group_final)
2199 break;
2200 if (cur->key.op == OP_ASSIGN_FINAL)
2201 event->group_final = true;
1edefa4f 2202 event->group_set = true;
912541b0 2203 event->gid = cur->key.gid;
9f6445e3 2204 log_debug("GROUP %u %s:%u",
baa30fbc 2205 event->gid,
915bf0f6 2206 rules_str(rules, rule->rule.filename_off),
baa30fbc 2207 rule->rule.filename_line);
912541b0
KS		 2208 break;
2209 case TK_A_MODE_ID:
2210 if (event->mode_final)
2211 break;
2212 if (cur->key.op == OP_ASSIGN_FINAL)
2213 event->mode_final = true;
2214 event->mode_set = true;
2215 event->mode = cur->key.mode;
9f6445e3 2216 log_debug("MODE %#o %s:%u",
baa30fbc 2217 event->mode,
915bf0f6 2218 rules_str(rules, rule->rule.filename_off),
baa30fbc 2219 rule->rule.filename_line);
912541b0 2220 break;
c26547d6
KS		 2221 case TK_A_SECLABEL: {
2222 const char *name, *label;
2223
2224 name = rules_str(rules, cur->key.attr_off);
2225 label = rules_str(rules, cur->key.value_off);
2226 if (cur->key.op == OP_ASSIGN || cur->key.op == OP_ASSIGN_FINAL)
2227 udev_list_cleanup(&event->seclabel_list);
2228 udev_list_entry_add(&event->seclabel_list, name, label);
9f6445e3 2229 log_debug("SECLABEL{%s}='%s' %s:%u",
c26547d6
KS		 2230 name, label,
2231 rules_str(rules, rule->rule.filename_off),
2232 rule->rule.filename_line);
2233 break;
2234 }
912541b0 2235 case TK_A_ENV: {
915bf0f6
KS		 2236 const char *name = rules_str(rules, cur->key.attr_off);
2237 char *value = rules_str(rules, cur->key.value_off);
07845c14
KS		 2238 char value_new[UTIL_NAME_SIZE];
2239 const char *value_old = NULL;
912541b0 2240
07845c14
KS		 2241 if (value[0] == '\0') {
2242 if (cur->key.op == OP_ADD)
2243 break;
912541b0 2244 udev_device_add_property(event->dev, name, NULL);
07845c14 2245 break;
912541b0 2246 }
07845c14
KS		 2247
2248 if (cur->key.op == OP_ADD)
2249 value_old = udev_device_get_property_value(event->dev, name);
2250 if (value_old) {
2251 char temp[UTIL_NAME_SIZE];
2252
2253 /* append value separated by space */
2254 udev_event_apply_format(event, value, temp, sizeof(temp));
d5a89d7d 2255 strscpyl(value_new, sizeof(value_new), value_old, " ", temp, NULL);
07845c14
KS		 2256 } else
2257 udev_event_apply_format(event, value, value_new, sizeof(value_new));
2258
df546eb5 2259 udev_device_add_property(event->dev, name, value_new);
912541b0
KS		 2260 break;
2261 }
2262 case TK_A_TAG: {
2263 char tag[UTIL_PATH_SIZE];
2264 const char *p;
2265
915bf0f6 2266 udev_event_apply_format(event, rules_str(rules, cur->key.value_off), tag, sizeof(tag));
912541b0
KS		 2267 if (cur->key.op == OP_ASSIGN || cur->key.op == OP_ASSIGN_FINAL)
2268 udev_device_cleanup_tags_list(event->dev);
2269 for (p = tag; *p != '\0'; p++) {
2270 if ((*p >= 'a' && *p <= 'z') ||
2271 (*p >= 'A' && *p <= 'Z') ||
2272 (*p >= '0' && *p <= '9') ||
2273 *p == '-' || *p == '_')
2274 continue;
9f6445e3 2275 log_error("ignoring invalid tag name '%s'", tag);
912541b0
KS		 2276 break;
2277 }
8e3ba377
DH		 2278 if (cur->key.op == OP_REMOVE)
2279 udev_device_remove_tag(event->dev, tag);
2280 else
2281 udev_device_add_tag(event->dev, tag);
912541b0
KS		 2282 break;
2283 }
2284 case TK_A_NAME: {
915bf0f6 2285 const char *name = rules_str(rules, cur->key.value_off);
0ecfcbd4 2286
912541b0
KS		 2287 char name_str[UTIL_PATH_SIZE];
2288 int count;
2289
2290 if (event->name_final)
2291 break;
2292 if (cur->key.op == OP_ASSIGN_FINAL)
2293 event->name_final = true;
2294 udev_event_apply_format(event, name, name_str, sizeof(name_str));
2295 if (esc == ESCAPE_UNSET || esc == ESCAPE_REPLACE) {
2296 count = util_replace_chars(name_str, "/");
2297 if (count > 0)
9f6445e3 2298 log_debug("%i character(s) replaced", count);
912541b0 2299 }
6ada823a 2300 if (major(udev_device_get_devnum(event->dev)) &&
99f16bb8
ZJS		 2301 !streq(name_str, udev_device_get_devnode(event->dev) + strlen("/dev/"))) {
2302 log_error("NAME=\"%s\" ignored, kernel device nodes cannot be renamed; please fix it in %s:%u\n",
2303 name,
2304 rules_str(rules, rule->rule.filename_off),
2305 rule->rule.filename_line);
6ada823a 2306 break;
0ecfcbd4 2307 }
4fd6af76
ZJS		 2308 if (free_and_strdup(&event->name, name_str) < 0) {
2309 log_oom();
2310 return;
2311 }
9f6445e3 2312 log_debug("NAME '%s' %s:%u",
baa30fbc 2313 event->name,
915bf0f6 2314 rules_str(rules, rule->rule.filename_off),
baa30fbc 2315 rule->rule.filename_line);
912541b0
KS		 2316 break;
2317 }
2318 case TK_A_DEVLINK: {
2319 char temp[UTIL_PATH_SIZE];
2320 char filename[UTIL_PATH_SIZE];
2321 char *pos, *next;
2322 int count = 0;
2323
2324 if (event->devlink_final)
2325 break;
2326 if (major(udev_device_get_devnum(event->dev)) == 0)
2327 break;
2328 if (cur->key.op == OP_ASSIGN_FINAL)
2329 event->devlink_final = true;
2330 if (cur->key.op == OP_ASSIGN || cur->key.op == OP_ASSIGN_FINAL)
2331 udev_device_cleanup_devlinks_list(event->dev);
2332
2333 /* allow multiple symlinks separated by spaces */
915bf0f6 2334 udev_event_apply_format(event, rules_str(rules, cur->key.value_off), temp, sizeof(temp));
912541b0
KS		 2335 if (esc == ESCAPE_UNSET)
2336 count = util_replace_chars(temp, "/ ");
2337 else if (esc == ESCAPE_REPLACE)
2338 count = util_replace_chars(temp, "/");
2339 if (count > 0)
9f6445e3 2340 log_debug("%i character(s) replaced" , count);
912541b0
KS		 2341 pos = temp;
2342 while (isspace(pos[0]))
2343 pos++;
2344 next = strchr(pos, ' ');
2345 while (next != NULL) {
2346 next[0] = '\0';
9f6445e3 2347 log_debug("LINK '%s' %s:%u", pos,
915bf0f6 2348 rules_str(rules, rule->rule.filename_off), rule->rule.filename_line);
d5a89d7d 2349 strscpyl(filename, sizeof(filename), "/dev/", pos, NULL);
8a173387 2350 udev_device_add_devlink(event->dev, filename);
912541b0
KS		 2351 while (isspace(next[1]))
2352 next++;
2353 pos = &next[1];
2354 next = strchr(pos, ' ');
2355 }
2356 if (pos[0] != '\0') {
9f6445e3 2357 log_debug("LINK '%s' %s:%u", pos,
915bf0f6 2358 rules_str(rules, rule->rule.filename_off), rule->rule.filename_line);
d5a89d7d 2359 strscpyl(filename, sizeof(filename), "/dev/", pos, NULL);
8a173387 2360 udev_device_add_devlink(event->dev, filename);
912541b0
KS		 2361 }
2362 break;
2363 }
2364 case TK_A_ATTR: {
915bf0f6 2365 const char *key_name = rules_str(rules, cur->key.attr_off);
912541b0
KS		 2366 char attr[UTIL_PATH_SIZE];
2367 char value[UTIL_NAME_SIZE];
fdd21be6 2368 _cleanup_fclose_ FILE *f = NULL;
912541b0
KS		 2369
2370 if (util_resolve_subsys_kernel(event->udev, key_name, attr, sizeof(attr), 0) != 0)
d5a89d7d 2371 strscpyl(attr, sizeof(attr), udev_device_get_syspath(event->dev), "/", key_name, NULL);
912541b0
KS		 2372 attr_subst_subdir(attr, sizeof(attr));
2373
915bf0f6 2374 udev_event_apply_format(event, rules_str(rules, cur->key.value_off), value, sizeof(value));
9f6445e3 2375 log_debug("ATTR '%s' writing '%s' %s:%u", attr, value,
915bf0f6 2376 rules_str(rules, rule->rule.filename_off),
baa30fbc 2377 rule->rule.filename_line);
47ef94ac 2378 f = fopen(attr, "we");
fdd21be6 2379 if (f == NULL)
56f64d95 2380 log_error_errno(errno, "error opening ATTR{%s} for writing: %m", attr);
fdd21be6
ZJS		 2381 else if (fprintf(f, "%s", value) <= 0)
2382 log_error_errno(errno, "error writing ATTR{%s}: %m", attr);
912541b0
KS		 2383 break;
2384 }
f4cf2e5b
KS		 2385 case TK_A_SYSCTL: {
2386 char filename[UTIL_PATH_SIZE];
2387 char value[UTIL_NAME_SIZE];
2388 int r;
2389
2390 udev_event_apply_format(event, rules_str(rules, cur->key.attr_off), filename, sizeof(filename));
2391 sysctl_normalize(filename);
2392 udev_event_apply_format(event, rules_str(rules, cur->key.value_off), value, sizeof(value));
2393 log_debug("SYSCTL '%s' writing '%s' %s:%u", filename, value,
2394 rules_str(rules, rule->rule.filename_off), rule->rule.filename_line);
2395 r = sysctl_write(filename, value);
2396 if (r < 0)
46b57b6e 2397 log_error_errno(r, "error writing SYSCTL{%s}='%s': %m", filename, value);
f4cf2e5b
KS		 2398 break;
2399 }
83cd6b75
KS		 2400 case TK_A_RUN_BUILTIN:
2401 case TK_A_RUN_PROGRAM: {
2402 struct udev_list_entry *entry;
2403
912541b0
KS		 2404 if (cur->key.op == OP_ASSIGN || cur->key.op == OP_ASSIGN_FINAL)
2405 udev_list_cleanup(&event->run_list);
9f6445e3 2406 log_debug("RUN '%s' %s:%u",
915bf0f6
KS		 2407 rules_str(rules, cur->key.value_off),
2408 rules_str(rules, rule->rule.filename_off),
baa30fbc 2409 rule->rule.filename_line);
915bf0f6 2410 entry = udev_list_entry_add(&event->run_list, rules_str(rules, cur->key.value_off), NULL);
83cd6b75 2411 udev_list_entry_set_num(entry, cur->key.builtin_cmd);
912541b0
KS		 2412 break;
2413 }
2414 case TK_A_GOTO:
2415 if (cur->key.rule_goto == 0)
2416 break;
2417 cur = &rules->tokens[cur->key.rule_goto];
2418 continue;
2419 case TK_END:
4fd6af76 2420 return;
912541b0
KS		 2421
2422 case TK_M_PARENTS_MIN:
2423 case TK_M_PARENTS_MAX:
2424 case TK_M_MAX:
2425 case TK_UNSET:
9f6445e3 2426 log_error("wrong type %u", cur->type);
912541b0
KS		 2427 goto nomatch;
2428 }
2429
2430 cur++;
2431 continue;
2432 nomatch:
2433 /* fast-forward to next rule */
2434 cur = rule + rule->rule.token_count;
912541b0 2435 }
6880b25d 2436}
761dfddc 2437
9ec6e95b 2438int udev_rules_apply_static_dev_perms(struct udev_rules *rules) {
912541b0
KS		 2439 struct token *cur;
2440 struct token *rule;
2441 uid_t uid = 0;
2442 gid_t gid = 0;
2443 mode_t mode = 0;
84b6ad70
TG		 2444 _cleanup_strv_free_ char **tags = NULL;
2445 char **t;
2446 FILE *f = NULL;
2447 _cleanup_free_ char *path = NULL;
fdd21be6 2448 int r;
912541b0
KS		 2449
2450 if (rules->tokens == NULL)
84b6ad70 2451 return 0;
912541b0
KS		 2452
2453 cur = &rules->tokens[0];
2454 rule = cur;
2455 for (;;) {
2456 switch (cur->type) {
2457 case TK_RULE:
2458 /* current rule */
2459 rule = cur;
2460
2461 /* skip rules without a static_node tag */
2462 if (!rule->rule.has_static_node)
2463 goto next;
2464
2465 uid = 0;
2466 gid = 0;
2467 mode = 0;
97b11eed 2468 tags = strv_free(tags);
912541b0
KS		 2469 break;
2470 case TK_A_OWNER_ID:
2471 uid = cur->key.uid;
2472 break;
2473 case TK_A_GROUP_ID:
2474 gid = cur->key.gid;
2475 break;
2476 case TK_A_MODE_ID:
2477 mode = cur->key.mode;
84b6ad70
TG		 2478 break;
2479 case TK_A_TAG:
2480 r = strv_extend(&tags, rules_str(rules, cur->key.value_off));
2481 if (r < 0)
2482 goto finish;
2483
912541b0
KS		 2484 break;
2485 case TK_A_STATIC_NODE: {
84b6ad70
TG		 2486 char device_node[UTIL_PATH_SIZE];
2487 char tags_dir[UTIL_PATH_SIZE];
2488 char tag_symlink[UTIL_PATH_SIZE];
912541b0
KS		 2489 struct stat stats;
2490
2491 /* we assure, that the permissions tokens are sorted before the static token */
ca2bb160 2492
84b6ad70 2493 if (mode == 0 && uid == 0 && gid == 0 && tags == NULL)
912541b0 2494 goto next;
d6f116a7 2495
84b6ad70 2496 strscpyl(device_node, sizeof(device_node), "/dev/", rules_str(rules, cur->key.value_off), NULL);
ca2bb160
KS		 2497 if (stat(device_node, &stats) != 0)
2498 break;
2499 if (!S_ISBLK(stats.st_mode) && !S_ISCHR(stats.st_mode))
2500 break;
84b6ad70 2501
d6f116a7 2502 /* export the tags to a directory as symlinks, allowing otherwise dead nodes to be tagged */
84b6ad70 2503 if (tags) {
84b6ad70
TG		 2504 STRV_FOREACH(t, tags) {
2505 _cleanup_free_ char *unescaped_filename = NULL;
2506
2507 strscpyl(tags_dir, sizeof(tags_dir), "/run/udev/static_node-tags/", *t, "/", NULL);
2508 r = mkdir_p(tags_dir, 0755);
f647962d
MS		 2509 if (r < 0)
2510 return log_error_errno(r, "failed to create %s: %m", tags_dir);
84b6ad70
TG		 2511
2512 unescaped_filename = xescape(rules_str(rules, cur->key.value_off), "/.");
2513
2514 strscpyl(tag_symlink, sizeof(tag_symlink), tags_dir, unescaped_filename, NULL);
2515 r = symlink(device_node, tag_symlink);
4a62c710
MS		 2516 if (r < 0 && errno != EEXIST)
2517 return log_error_errno(errno, "failed to create symlink %s -> %s: %m",
2518 tag_symlink, device_node);
84b6ad70
TG		 2519 }
2520 }
2521
15a72200
TG		 2522 /* don't touch the permissions if only the tags were set */
2523 if (mode == 0 && uid == 0 && gid == 0)
d6f116a7
KS		 2524 break;
2525
912541b0
KS		 2526 if (mode == 0) {
2527 if (gid > 0)
2528 mode = 0660;
2529 else
2530 mode = 0600;
2531 }
2532 if (mode != (stats.st_mode & 01777)) {
490f0087
TG		 2533 r = chmod(device_node, mode);
2534 if (r < 0) {
9f6445e3 2535 log_error("failed to chmod '%s' %#o", device_node, mode);
490f0087
TG		 2536 return -errno;
2537 } else
9f6445e3 2538 log_debug("chmod '%s' %#o", device_node, mode);
912541b0
KS		 2539 }
2540
2541 if ((uid != 0 && uid != stats.st_uid) || (gid != 0 && gid != stats.st_gid)) {
490f0087
TG		 2542 r = chown(device_node, uid, gid);
2543 if (r < 0) {
9f6445e3 2544 log_error("failed to chown '%s' %u %u ", device_node, uid, gid);
490f0087
TG		 2545 return -errno;
2546 } else
9f6445e3 2547 log_debug("chown '%s' %u %u", device_node, uid, gid);
912541b0
KS		 2548 }
2549
84b6ad70 2550 utimensat(AT_FDCWD, device_node, NULL, 0);
912541b0
KS		 2551 break;
2552 }
2553 case TK_END:
84b6ad70 2554 goto finish;
912541b0
KS		 2555 }
2556
2557 cur++;
2558 continue;
761dfddc 2559next:
912541b0
KS		 2560 /* fast-forward to next rule */
2561 cur = rule + rule->rule.token_count;
2562 continue;
2563 }
84b6ad70
TG		 2564
2565finish:
2566 if (f) {
2567 fflush(f);
2568 fchmod(fileno(f), 0644);
2569 if (ferror(f) || rename(path, "/run/udev/static_node-tags") < 0) {
fdd21be6
ZJS		 2570 unlink_noerrno("/run/udev/static_node-tags");
2571 unlink_noerrno(path);
2572 return -errno;
84b6ad70 2573 }
84b6ad70
TG		 2574 }
2575
fdd21be6 2576 return 0;
761dfddc 2577}
Unnamed repository; edit this file 'description' to name the repository.