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[thirdparty/systemd.git] / src / udev / udev-rules.c
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2232cac8 1/*
1298001e 2 * Copyright (C) 2003-2012 Kay Sievers <kay@vrfy.org>
2232cac8 3 *
55e9959b
KS		 4 * This program is free software: you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation, either version 2 of the License, or
7 * (at your option) any later version.
3d6d12c6 8 *
55e9959b
KS		 9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
2232cac8 13 *
55e9959b
KS		 14 * You should have received a copy of the GNU General Public License
15 * along with this program. If not, see <http://www.gnu.org/licenses/>.
2232cac8
GKH		 16 */
17
18#include <stddef.h>
1449a55d 19#include <limits.h>
2232cac8 20#include <stdlib.h>
6d87ee2e 21#include <stdbool.h>
2232cac8
GKH		 22#include <string.h>
23#include <stdio.h>
24#include <fcntl.h>
25#include <ctype.h>
26#include <unistd.h>
27#include <errno.h>
5ee7ecfb 28#include <dirent.h>
cea61f5c 29#include <fnmatch.h>
959e8b5d 30#include <time.h>
2232cac8 31
2232cac8 32#include "udev.h"
9eb977db 33#include "path-util.h"
2c21044f 34#include "conf-files.h"
915bf0f6 35#include "strbuf.h"
84b6ad70 36#include "strv.h"
1291bc89 37#include "util.h"
2232cac8 38
a1525d17 39#define PREALLOC_TOKEN 2048
c7521974 40
4052400f 41struct uid_gid {
912541b0
KS		 42 unsigned int name_off;
43 union {
a1525d17
KS		 44 uid_t uid;
45 gid_t gid;
912541b0 46 };
4052400f
KS		 47};
48
2ad8416d
ZJS		 49static const char* const rules_dirs[] = {
50 "/etc/udev/rules.d",
51 "/run/udev/rules.d",
52 UDEVLIBEXECDIR "/rules.d",
53 NULL};
54
4052400f 55struct udev_rules {
912541b0 56 struct udev *udev;
97f2d76d 57 usec_t dirs_ts_usec;
912541b0
KS		 58 int resolve_names;
59
60 /* every key in the rules file becomes a token */
61 struct token *tokens;
62 unsigned int token_cur;
63 unsigned int token_max;
64
ab06eef8 65 /* all key strings are copied and de-duplicated in a single continuous string buffer */
915bf0f6 66 struct strbuf *strbuf;
912541b0
KS		 67
68 /* during rule parsing, uid/gid lookup results are cached */
69 struct uid_gid *uids;
70 unsigned int uids_cur;
71 unsigned int uids_max;
72 struct uid_gid *gids;
73 unsigned int gids_cur;
74 unsigned int gids_max;
4052400f
KS		 75};
76
915bf0f6
KS		 77static char *rules_str(struct udev_rules *rules, unsigned int off) {
78 return rules->strbuf->buf + off;
79}
80
81static unsigned int rules_add_string(struct udev_rules *rules, const char *s) {
82 return strbuf_add_string(rules->strbuf, s, strlen(s));
83}
84
8e3ba377 85/* KEY=="", KEY!="", KEY+="", KEY-="", KEY="", KEY:="" */
b0f7409f 86enum operation_type {
912541b0 87 OP_UNSET,
b0f7409f 88
912541b0
KS		 89 OP_MATCH,
90 OP_NOMATCH,
91 OP_MATCH_MAX,
b0f7409f 92
912541b0 93 OP_ADD,
8e3ba377 94 OP_REMOVE,
912541b0
KS		 95 OP_ASSIGN,
96 OP_ASSIGN_FINAL,
c7521974
KS		 97};
98
ac218d9c 99enum string_glob_type {
912541b0 100 GL_UNSET,
a1525d17 101 GL_PLAIN, /* no special chars */
912541b0 102 GL_GLOB, /* shell globs ?,*,[] */
a1525d17
KS		 103 GL_SPLIT, /* multi-value A|B */
104 GL_SPLIT_GLOB, /* multi-value with glob A*|B* */
105 GL_SOMETHING, /* commonly used "?*" */
ac218d9c
KS		 106};
107
32028733 108enum string_subst_type {
912541b0
KS		 109 SB_UNSET,
110 SB_NONE,
111 SB_FORMAT,
112 SB_SUBSYS,
32028733
KS		 113};
114
154a7b84 115/* tokens of a rule are sorted/handled in this order */
6880b25d 116enum token_type {
912541b0
KS		 117 TK_UNSET,
118 TK_RULE,
119
a1525d17
KS		 120 TK_M_ACTION, /* val */
121 TK_M_DEVPATH, /* val */
122 TK_M_KERNEL, /* val */
123 TK_M_DEVLINK, /* val */
124 TK_M_NAME, /* val */
125 TK_M_ENV, /* val, attr */
126 TK_M_TAG, /* val */
127 TK_M_SUBSYSTEM, /* val */
128 TK_M_DRIVER, /* val */
129 TK_M_WAITFOR, /* val */
130 TK_M_ATTR, /* val, attr */
912541b0
KS		 131
132 TK_M_PARENTS_MIN,
a1525d17 133 TK_M_KERNELS, /* val */
912541b0 134 TK_M_SUBSYSTEMS, /* val */
a1525d17
KS		 135 TK_M_DRIVERS, /* val */
136 TK_M_ATTRS, /* val, attr */
137 TK_M_TAGS, /* val */
912541b0
KS		 138 TK_M_PARENTS_MAX,
139
a1525d17 140 TK_M_TEST, /* val, mode_t */
a1525d17
KS		 141 TK_M_PROGRAM, /* val */
142 TK_M_IMPORT_FILE, /* val */
143 TK_M_IMPORT_PROG, /* val */
144 TK_M_IMPORT_BUILTIN, /* val */
145 TK_M_IMPORT_DB, /* val */
146 TK_M_IMPORT_CMDLINE, /* val */
147 TK_M_IMPORT_PARENT, /* val */
148 TK_M_RESULT, /* val */
912541b0
KS		 149 TK_M_MAX,
150
151 TK_A_STRING_ESCAPE_NONE,
152 TK_A_STRING_ESCAPE_REPLACE,
153 TK_A_DB_PERSIST,
a1525d17
KS		 154 TK_A_INOTIFY_WATCH, /* int */
155 TK_A_DEVLINK_PRIO, /* int */
156 TK_A_OWNER, /* val */
157 TK_A_GROUP, /* val */
158 TK_A_MODE, /* val */
159 TK_A_OWNER_ID, /* uid_t */
160 TK_A_GROUP_ID, /* gid_t */
161 TK_A_MODE_ID, /* mode_t */
84b6ad70 162 TK_A_TAG, /* val */
a1525d17 163 TK_A_STATIC_NODE, /* val */
c26547d6 164 TK_A_SECLABEL, /* val, attr */
a1525d17 165 TK_A_ENV, /* val, attr */
a1525d17
KS		 166 TK_A_NAME, /* val */
167 TK_A_DEVLINK, /* val */
168 TK_A_ATTR, /* val, attr */
83cd6b75
KS		 169 TK_A_RUN_BUILTIN, /* val, bool */
170 TK_A_RUN_PROGRAM, /* val, bool */
a1525d17 171 TK_A_GOTO, /* size_t */
912541b0
KS		 172
173 TK_END,
c7521974
KS		 174};
175
3f3aa9f5 176/* we try to pack stuff in a way that we take only 12 bytes per token */
4052400f 177struct token {
912541b0
KS		 178 union {
179 unsigned char type; /* same in rule and key */
180 struct {
181 enum token_type type:8;
182 bool can_set_name:1;
183 bool has_static_node:1;
184 unsigned int unused:6;
185 unsigned short token_count;
186 unsigned int label_off;
187 unsigned short filename_off;
188 unsigned short filename_line;
189 } rule;
190 struct {
191 enum token_type type:8;
192 enum operation_type op:8;
193 enum string_glob_type glob:8;
194 enum string_subst_type subst:4;
195 enum string_subst_type attrsubst:4;
196 unsigned int value_off;
197 union {
198 unsigned int attr_off;
912541b0
KS		 199 unsigned int rule_goto;
200 mode_t mode;
201 uid_t uid;
202 gid_t gid;
203 int devlink_prio;
912541b0
KS		 204 int watch;
205 enum udev_builtin_cmd builtin_cmd;
206 };
207 } key;
208 };
4052400f
KS		 209};
210
912541b0 211#define MAX_TK 64
4052400f 212struct rule_tmp {
912541b0
KS		 213 struct udev_rules *rules;
214 struct token rule;
215 struct token token[MAX_TK];
216 unsigned int token_cur;
4052400f
KS		 217};
218
baa30fbc 219#ifdef DEBUG
9ec6e95b 220static const char *operation_str(enum operation_type type) {
912541b0 221 static const char *operation_strs[] = {
a1525d17
KS		 222 [OP_UNSET] = "UNSET",
223 [OP_MATCH] = "match",
224 [OP_NOMATCH] = "nomatch",
912541b0
KS		 225 [OP_MATCH_MAX] = "MATCH_MAX",
226
a1525d17 227 [OP_ADD] = "add",
8e3ba377 228 [OP_REMOVE] = "remove",
a1525d17
KS		 229 [OP_ASSIGN] = "assign",
230 [OP_ASSIGN_FINAL] = "assign-final",
912541b0
KS		 231} ;
232
233 return operation_strs[type];
5d6a1fa6 234}
4052400f 235
9ec6e95b 236static const char *string_glob_str(enum string_glob_type type) {
912541b0 237 static const char *string_glob_strs[] = {
a1525d17
KS		 238 [GL_UNSET] = "UNSET",
239 [GL_PLAIN] = "plain",
240 [GL_GLOB] = "glob",
241 [GL_SPLIT] = "split",
242 [GL_SPLIT_GLOB] = "split-glob",
243 [GL_SOMETHING] = "split-glob",
912541b0
KS		 244 };
245
246 return string_glob_strs[type];
5d6a1fa6
KS		 247}
248
9ec6e95b 249static const char *token_str(enum token_type type) {
912541b0 250 static const char *token_strs[] = {
a1525d17
KS		 251 [TK_UNSET] = "UNSET",
252 [TK_RULE] = "RULE",
912541b0 253
a1525d17 254 [TK_M_ACTION] = "M ACTION",
912541b0 255 [TK_M_DEVPATH] = "M DEVPATH",
a1525d17 256 [TK_M_KERNEL] = "M KERNEL",
912541b0 257 [TK_M_DEVLINK] = "M DEVLINK",
a1525d17
KS		 258 [TK_M_NAME] = "M NAME",
259 [TK_M_ENV] = "M ENV",
260 [TK_M_TAG] = "M TAG",
261 [TK_M_SUBSYSTEM] = "M SUBSYSTEM",
262 [TK_M_DRIVER] = "M DRIVER",
912541b0 263 [TK_M_WAITFOR] = "M WAITFOR",
a1525d17 264 [TK_M_ATTR] = "M ATTR",
912541b0 265
a1525d17 266 [TK_M_PARENTS_MIN] = "M PARENTS_MIN",
912541b0 267 [TK_M_KERNELS] = "M KERNELS",
a1525d17 268 [TK_M_SUBSYSTEMS] = "M SUBSYSTEMS",
912541b0 269 [TK_M_DRIVERS] = "M DRIVERS",
a1525d17
KS		 270 [TK_M_ATTRS] = "M ATTRS",
271 [TK_M_TAGS] = "M TAGS",
272 [TK_M_PARENTS_MAX] = "M PARENTS_MAX",
912541b0 273
a1525d17 274 [TK_M_TEST] = "M TEST",
912541b0 275 [TK_M_PROGRAM] = "M PROGRAM",
a1525d17
KS		 276 [TK_M_IMPORT_FILE] = "M IMPORT_FILE",
277 [TK_M_IMPORT_PROG] = "M IMPORT_PROG",
278 [TK_M_IMPORT_BUILTIN] = "M IMPORT_BUILTIN",
279 [TK_M_IMPORT_DB] = "M IMPORT_DB",
280 [TK_M_IMPORT_CMDLINE] = "M IMPORT_CMDLINE",
281 [TK_M_IMPORT_PARENT] = "M IMPORT_PARENT",
282 [TK_M_RESULT] = "M RESULT",
283 [TK_M_MAX] = "M MAX",
284
285 [TK_A_STRING_ESCAPE_NONE] = "A STRING_ESCAPE_NONE",
286 [TK_A_STRING_ESCAPE_REPLACE] = "A STRING_ESCAPE_REPLACE",
287 [TK_A_DB_PERSIST] = "A DB_PERSIST",
288 [TK_A_INOTIFY_WATCH] = "A INOTIFY_WATCH",
289 [TK_A_DEVLINK_PRIO] = "A DEVLINK_PRIO",
290 [TK_A_OWNER] = "A OWNER",
291 [TK_A_GROUP] = "A GROUP",
292 [TK_A_MODE] = "A MODE",
293 [TK_A_OWNER_ID] = "A OWNER_ID",
294 [TK_A_GROUP_ID] = "A GROUP_ID",
295 [TK_A_STATIC_NODE] = "A STATIC_NODE",
c26547d6 296 [TK_A_SECLABEL] = "A SECLABEL",
912541b0 297 [TK_A_MODE_ID] = "A MODE_ID",
a1525d17
KS		 298 [TK_A_ENV] = "A ENV",
299 [TK_A_TAG] = "A ENV",
300 [TK_A_NAME] = "A NAME",
912541b0 301 [TK_A_DEVLINK] = "A DEVLINK",
a1525d17 302 [TK_A_ATTR] = "A ATTR",
83cd6b75
KS		 303 [TK_A_RUN_BUILTIN] = "A RUN_BUILTIN",
304 [TK_A_RUN_PROGRAM] = "A RUN_PROGRAM",
a1525d17 305 [TK_A_GOTO] = "A GOTO",
912541b0 306
a1525d17 307 [TK_END] = "END",
912541b0
KS		 308 };
309
310 return token_strs[type];
5d6a1fa6 311}
c7521974 312
9ec6e95b 313static void dump_token(struct udev_rules *rules, struct token *token) {
912541b0
KS		 314 enum token_type type = token->type;
315 enum operation_type op = token->key.op;
316 enum string_glob_type glob = token->key.glob;
915bf0f6 317 const char *value = str(rules, token->key.value_off);
912541b0
KS		 318 const char *attr = &rules->buf[token->key.attr_off];
319
320 switch (type) {
321 case TK_RULE:
322 {
323 const char *tks_ptr = (char *)rules->tokens;
324 const char *tk_ptr = (char *)token;
325 unsigned int idx = (tk_ptr - tks_ptr) / sizeof(struct token);
326
9f6445e3 327 log_debug("* RULE %s:%u, token: %u, count: %u, label: '%s'",
baa30fbc
KS		 328 &rules->buf[token->rule.filename_off], token->rule.filename_line,
329 idx, token->rule.token_count,
330 &rules->buf[token->rule.label_off]);
912541b0
KS		 331 break;
332 }
333 case TK_M_ACTION:
334 case TK_M_DEVPATH:
335 case TK_M_KERNEL:
336 case TK_M_SUBSYSTEM:
337 case TK_M_DRIVER:
338 case TK_M_WAITFOR:
339 case TK_M_DEVLINK:
340 case TK_M_NAME:
341 case TK_M_KERNELS:
342 case TK_M_SUBSYSTEMS:
343 case TK_M_DRIVERS:
344 case TK_M_TAGS:
345 case TK_M_PROGRAM:
346 case TK_M_IMPORT_FILE:
347 case TK_M_IMPORT_PROG:
348 case TK_M_IMPORT_DB:
349 case TK_M_IMPORT_CMDLINE:
350 case TK_M_IMPORT_PARENT:
351 case TK_M_RESULT:
352 case TK_A_NAME:
353 case TK_A_DEVLINK:
354 case TK_A_OWNER:
355 case TK_A_GROUP:
356 case TK_A_MODE:
83cd6b75
KS		 357 case TK_A_RUN_BUILTIN:
358 case TK_A_RUN_PROGRAM:
9f6445e3 359 log_debug("%s %s '%s'(%s)",
baa30fbc 360 token_str(type), operation_str(op), value, string_glob_str(glob));
912541b0
KS		 361 break;
362 case TK_M_IMPORT_BUILTIN:
9f6445e3 363 log_debug("%s %i '%s'", token_str(type), token->key.builtin_cmd, value);
912541b0
KS		 364 break;
365 case TK_M_ATTR:
366 case TK_M_ATTRS:
367 case TK_M_ENV:
368 case TK_A_ATTR:
369 case TK_A_ENV:
9f6445e3 370 log_debug("%s %s '%s' '%s'(%s)",
baa30fbc 371 token_str(type), operation_str(op), attr, value, string_glob_str(glob));
912541b0
KS		 372 break;
373 case TK_M_TAG:
374 case TK_A_TAG:
9f6445e3 375 log_debug("%s %s '%s'", token_str(type), operation_str(op), value);
912541b0
KS		 376 break;
377 case TK_A_STRING_ESCAPE_NONE:
378 case TK_A_STRING_ESCAPE_REPLACE:
379 case TK_A_DB_PERSIST:
9f6445e3 380 log_debug("%s", token_str(type));
912541b0
KS		 381 break;
382 case TK_M_TEST:
9f6445e3 383 log_debug("%s %s '%s'(%s) %#o",
baa30fbc 384 token_str(type), operation_str(op), value, string_glob_str(glob), token->key.mode);
912541b0
KS		 385 break;
386 case TK_A_INOTIFY_WATCH:
9f6445e3 387 log_debug("%s %u", token_str(type), token->key.watch);
912541b0
KS		 388 break;
389 case TK_A_DEVLINK_PRIO:
9f6445e3 390 log_debug("%s %u", token_str(type), token->key.devlink_prio);
912541b0
KS		 391 break;
392 case TK_A_OWNER_ID:
9f6445e3 393 log_debug("%s %s %u", token_str(type), operation_str(op), token->key.uid);
912541b0
KS		 394 break;
395 case TK_A_GROUP_ID:
9f6445e3 396 log_debug("%s %s %u", token_str(type), operation_str(op), token->key.gid);
912541b0
KS		 397 break;
398 case TK_A_MODE_ID:
9f6445e3 399 log_debug("%s %s %#o", token_str(type), operation_str(op), token->key.mode);
912541b0
KS		 400 break;
401 case TK_A_STATIC_NODE:
9f6445e3 402 log_debug("%s '%s'", token_str(type), value);
912541b0 403 break;
c26547d6 404 case TK_A_SECLABEL:
9f6445e3 405 log_debug("%s %s '%s' '%s'", token_str(type), operation_str(op), attr, value);
c26547d6 406 break;
912541b0 407 case TK_A_GOTO:
9f6445e3 408 log_debug("%s '%s' %u", token_str(type), value, token->key.rule_goto);
912541b0
KS		 409 break;
410 case TK_END:
9f6445e3 411 log_debug("* %s", token_str(type));
912541b0
KS		 412 break;
413 case TK_M_PARENTS_MIN:
414 case TK_M_PARENTS_MAX:
415 case TK_M_MAX:
416 case TK_UNSET:
9f6445e3 417 log_debug("unknown type %u", type);
912541b0
KS		 418 break;
419 }
4052400f 420}
154a7b84 421
9ec6e95b 422static void dump_rules(struct udev_rules *rules) {
912541b0
KS		 423 unsigned int i;
424
9f6445e3 425 log_debug("dumping %u (%zu bytes) tokens, %u (%zu bytes) strings",
baa30fbc
KS		 426 rules->token_cur,
427 rules->token_cur * sizeof(struct token),
428 rules->buf_count,
429 rules->buf_cur);
f168c273 430 for (i = 0; i < rules->token_cur; i++)
912541b0 431 dump_token(rules, &rules->tokens[i]);
4052400f
KS		 432}
433#else
4052400f
KS		 434static inline void dump_token(struct udev_rules *rules, struct token *token) {}
435static inline void dump_rules(struct udev_rules *rules) {}
baa30fbc 436#endif /* DEBUG */
c7521974 437
9ec6e95b 438static int add_token(struct udev_rules *rules, struct token *token) {
912541b0
KS		 439 /* grow buffer if needed */
440 if (rules->token_cur+1 >= rules->token_max) {
441 struct token *tokens;
442 unsigned int add;
443
444 /* double the buffer size */
445 add = rules->token_max;
446 if (add < 8)
447 add = 8;
448
449 tokens = realloc(rules->tokens, (rules->token_max + add ) * sizeof(struct token));
450 if (tokens == NULL)
451 return -1;
912541b0
KS		 452 rules->tokens = tokens;
453 rules->token_max += add;
454 }
455 memcpy(&rules->tokens[rules->token_cur], token, sizeof(struct token));
456 rules->token_cur++;
457 return 0;
c7521974 458}
a27cd06c 459
9ec6e95b 460static uid_t add_uid(struct udev_rules *rules, const char *owner) {
912541b0 461 unsigned int i;
23bf8dd7 462 uid_t uid = 0;
912541b0 463 unsigned int off;
23bf8dd7 464 int r;
912541b0
KS		 465
466 /* lookup, if we know it already */
467 for (i = 0; i < rules->uids_cur; i++) {
468 off = rules->uids[i].name_off;
915bf0f6 469 if (streq(rules_str(rules, off), owner)) {
912541b0 470 uid = rules->uids[i].uid;
912541b0
KS		 471 return uid;
472 }
473 }
23bf8dd7
TG		 474 r = get_user_creds(&owner, &uid, NULL, NULL, NULL);
475 if (r < 0) {
476 if (r == -ENOENT || r == -ESRCH)
ff49bc32 477 log_error("specified user '%s' unknown", owner);
23bf8dd7 478 else
279d3c9c 479 log_error_errno(r, "error resolving user '%s': %m", owner);
23bf8dd7 480 }
912541b0
KS		 481
482 /* grow buffer if needed */
483 if (rules->uids_cur+1 >= rules->uids_max) {
484 struct uid_gid *uids;
485 unsigned int add;
486
487 /* double the buffer size */
488 add = rules->uids_max;
489 if (add < 1)
490 add = 8;
491
492 uids = realloc(rules->uids, (rules->uids_max + add ) * sizeof(struct uid_gid));
493 if (uids == NULL)
494 return uid;
912541b0
KS		 495 rules->uids = uids;
496 rules->uids_max += add;
497 }
498 rules->uids[rules->uids_cur].uid = uid;
915bf0f6 499 off = rules_add_string(rules, owner);
912541b0
KS		 500 if (off <= 0)
501 return uid;
502 rules->uids[rules->uids_cur].name_off = off;
503 rules->uids_cur++;
504 return uid;
154a7b84
KS		 505}
506
9ec6e95b 507static gid_t add_gid(struct udev_rules *rules, const char *group) {
912541b0 508 unsigned int i;
23bf8dd7 509 gid_t gid = 0;
912541b0 510 unsigned int off;
23bf8dd7 511 int r;
912541b0
KS		 512
513 /* lookup, if we know it already */
514 for (i = 0; i < rules->gids_cur; i++) {
515 off = rules->gids[i].name_off;
915bf0f6 516 if (streq(rules_str(rules, off), group)) {
912541b0 517 gid = rules->gids[i].gid;
912541b0
KS		 518 return gid;
519 }
520 }
23bf8dd7
TG		 521 r = get_group_creds(&group, &gid);
522 if (r < 0) {
523 if (r == -ENOENT || r == -ESRCH)
ff49bc32 524 log_error("specified group '%s' unknown", group);
23bf8dd7 525 else
279d3c9c 526 log_error_errno(r, "error resolving group '%s': %m", group);
23bf8dd7 527 }
912541b0
KS		 528
529 /* grow buffer if needed */
530 if (rules->gids_cur+1 >= rules->gids_max) {
531 struct uid_gid *gids;
532 unsigned int add;
533
534 /* double the buffer size */
535 add = rules->gids_max;
536 if (add < 1)
537 add = 8;
538
539 gids = realloc(rules->gids, (rules->gids_max + add ) * sizeof(struct uid_gid));
540 if (gids == NULL)
541 return gid;
912541b0
KS		 542 rules->gids = gids;
543 rules->gids_max += add;
544 }
545 rules->gids[rules->gids_cur].gid = gid;
915bf0f6 546 off = rules_add_string(rules, group);
912541b0
KS		 547 if (off <= 0)
548 return gid;
549 rules->gids[rules->gids_cur].name_off = off;
550 rules->gids_cur++;
551 return gid;
154a7b84
KS		 552}
553
9ec6e95b 554static int import_property_from_string(struct udev_device *dev, char *line) {
912541b0
KS		 555 char *key;
556 char *val;
557 size_t len;
0aa5b4d1 558 struct udev_list_entry *entry;
912541b0
KS		 559
560 /* find key */
561 key = line;
562 while (isspace(key[0]))
563 key++;
564
565 /* comment or empty line */
566 if (key[0] == '#' || key[0] == '\0')
567 return -1;
568
569 /* split key/value */
570 val = strchr(key, '=');
571 if (val == NULL)
572 return -1;
573 val[0] = '\0';
574 val++;
575
576 /* find value */
577 while (isspace(val[0]))
578 val++;
579
580 /* terminate key */
581 len = strlen(key);
582 if (len == 0)
583 return -1;
584 while (isspace(key[len-1]))
585 len--;
586 key[len] = '\0';
587
588 /* terminate value */
589 len = strlen(val);
590 if (len == 0)
591 return -1;
592 while (isspace(val[len-1]))
593 len--;
594 val[len] = '\0';
595
596 if (len == 0)
597 return -1;
598
599 /* unquote */
600 if (val[0] == '"' || val[0] == '\'') {
601 if (val[len-1] != val[0]) {
9f6445e3 602 log_debug("inconsistent quoting: '%s', skip", line);
912541b0
KS		 603 return -1;
604 }
605 val[len-1] = '\0';
606 val++;
607 }
608
0aa5b4d1
KS		 609 entry = udev_device_add_property(dev, key, val);
610 /* store in db, skip private keys */
611 if (key[0] != '.')
612 udev_list_entry_set_num(entry, true);
613
912541b0 614 return 0;
be4bedd1
KS		 615}
616
9ec6e95b 617static int import_file_into_properties(struct udev_device *dev, const char *filename) {
912541b0
KS		 618 FILE *f;
619 char line[UTIL_LINE_SIZE];
620
47ef94ac 621 f = fopen(filename, "re");
912541b0
KS		 622 if (f == NULL)
623 return -1;
624 while (fgets(line, sizeof(line), f) != NULL)
625 import_property_from_string(dev, line);
626 fclose(f);
627 return 0;
bd0ed2ff
KS		 628}
629
dd5eddd2
KS		 630static int import_program_into_properties(struct udev_event *event,
631 usec_t timeout_usec,
67117413 632 usec_t timeout_warn_usec,
dd5eddd2 633 const char *program, const sigset_t *sigmask) {
912541b0
KS		 634 struct udev_device *dev = event->dev;
635 char **envp;
636 char result[UTIL_LINE_SIZE];
637 char *line;
638 int err;
639
640 envp = udev_device_get_properties_envp(dev);
67117413 641 err = udev_event_spawn(event, timeout_usec, timeout_warn_usec, program, envp, sigmask, result, sizeof(result));
912541b0
KS		 642 if (err < 0)
643 return err;
644
645 line = result;
646 while (line != NULL) {
647 char *pos;
648
649 pos = strchr(line, '\n');
650 if (pos != NULL) {
651 pos[0] = '\0';
652 pos = &pos[1];
653 }
654 import_property_from_string(dev, line);
655 line = pos;
656 }
657 return 0;
319c6700
KS		 658}
659
9ec6e95b 660static int import_parent_into_properties(struct udev_device *dev, const char *filter) {
912541b0
KS		 661 struct udev_device *dev_parent;
662 struct udev_list_entry *list_entry;
663
664 dev_parent = udev_device_get_parent(dev);
665 if (dev_parent == NULL)
666 return -1;
667
912541b0
KS		 668 udev_list_entry_foreach(list_entry, udev_device_get_properties_list_entry(dev_parent)) {
669 const char *key = udev_list_entry_get_name(list_entry);
670 const char *val = udev_list_entry_get_value(list_entry);
671
672 if (fnmatch(filter, key, 0) == 0) {
673 struct udev_list_entry *entry;
674
912541b0
KS		 675 entry = udev_device_add_property(dev, key, val);
676 /* store in db, skip private keys */
677 if (key[0] != '.')
678 udev_list_entry_set_num(entry, true);
679 }
680 }
681 return 0;
e2ecb34f
KS		 682}
683
912541b0 684#define WAIT_LOOP_PER_SECOND 50
9ec6e95b 685static int wait_for_file(struct udev_device *dev, const char *file, int timeout) {
912541b0
KS		 686 char filepath[UTIL_PATH_SIZE];
687 char devicepath[UTIL_PATH_SIZE];
688 struct stat stats;
689 int loop = timeout * WAIT_LOOP_PER_SECOND;
690
691 /* a relative path is a device attribute */
692 devicepath[0] = '\0';
693 if (file[0] != '/') {
d5a89d7d
KS		 694 strscpyl(devicepath, sizeof(devicepath), udev_device_get_syspath(dev), NULL);
695 strscpyl(filepath, sizeof(filepath), devicepath, "/", file, NULL);
912541b0
KS		 696 file = filepath;
697 }
698
912541b0
KS		 699 while (--loop) {
700 const struct timespec duration = { 0, 1000 * 1000 * 1000 / WAIT_LOOP_PER_SECOND };
701
702 /* lookup file */
703 if (stat(file, &stats) == 0) {
9f6445e3 704 log_debug("file '%s' appeared after %i loops", file, (timeout * WAIT_LOOP_PER_SECOND) - loop-1);
912541b0
KS		 705 return 0;
706 }
707 /* make sure, the device did not disappear in the meantime */
708 if (devicepath[0] != '\0' && stat(devicepath, &stats) != 0) {
9f6445e3 709 log_debug("device disappeared while waiting for '%s'", file);
912541b0
KS		 710 return -2;
711 }
9f6445e3 712 log_debug("wait for '%s' for %i mseconds", file, 1000 / WAIT_LOOP_PER_SECOND);
912541b0
KS		 713 nanosleep(&duration, NULL);
714 }
9f6445e3 715 log_debug("waiting for '%s' failed", file);
912541b0 716 return -1;
b2fe4b9a
KS		 717}
718
9ec6e95b 719static int attr_subst_subdir(char *attr, size_t len) {
912541b0
KS		 720 bool found = false;
721
722 if (strstr(attr, "/*/")) {
723 char *pos;
724 char dirname[UTIL_PATH_SIZE];
725 const char *tail;
726 DIR *dir;
727
d5a89d7d 728 strscpy(dirname, sizeof(dirname), attr);
912541b0
KS		 729 pos = strstr(dirname, "/*/");
730 if (pos == NULL)
731 return -1;
732 pos[0] = '\0';
733 tail = &pos[2];
734 dir = opendir(dirname);
735 if (dir != NULL) {
736 struct dirent *dent;
737
738 for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) {
739 struct stat stats;
740
741 if (dent->d_name[0] == '.')
742 continue;
d5a89d7d 743 strscpyl(attr, len, dirname, "/", dent->d_name, tail, NULL);
912541b0
KS		 744 if (stat(attr, &stats) == 0) {
745 found = true;
746 break;
747 }
748 }
749 closedir(dir);
750 }
751 }
752
753 return found;
0ea5e96e
KS		 754}
755
9ec6e95b 756static int get_key(struct udev *udev, char **line, char **key, enum operation_type *op, char **value) {
912541b0
KS		 757 char *linepos;
758 char *temp;
759
760 linepos = *line;
761 if (linepos == NULL || linepos[0] == '\0')
762 return -1;
763
764 /* skip whitespace */
765 while (isspace(linepos[0]) || linepos[0] == ',')
766 linepos++;
767
768 /* get the key */
769 if (linepos[0] == '\0')
770 return -1;
771 *key = linepos;
772
773 for (;;) {
774 linepos++;
775 if (linepos[0] == '\0')
776 return -1;
777 if (isspace(linepos[0]))
778 break;
779 if (linepos[0] == '=')
780 break;
8e3ba377 781 if ((linepos[0] == '+') || (linepos[0] == '-') || (linepos[0] == '!') || (linepos[0] == ':'))
912541b0
KS		 782 if (linepos[1] == '=')
783 break;
784 }
785
786 /* remember end of key */
787 temp = linepos;
788
789 /* skip whitespace after key */
790 while (isspace(linepos[0]))
791 linepos++;
792 if (linepos[0] == '\0')
793 return -1;
794
795 /* get operation type */
796 if (linepos[0] == '=' && linepos[1] == '=') {
797 *op = OP_MATCH;
798 linepos += 2;
799 } else if (linepos[0] == '!' && linepos[1] == '=') {
800 *op = OP_NOMATCH;
801 linepos += 2;
802 } else if (linepos[0] == '+' && linepos[1] == '=') {
803 *op = OP_ADD;
804 linepos += 2;
8e3ba377
DH		 805 } else if (linepos[0] == '-' && linepos[1] == '=') {
806 *op = OP_REMOVE;
807 linepos += 2;
912541b0
KS		 808 } else if (linepos[0] == '=') {
809 *op = OP_ASSIGN;
810 linepos++;
811 } else if (linepos[0] == ':' && linepos[1] == '=') {
812 *op = OP_ASSIGN_FINAL;
813 linepos += 2;
814 } else
815 return -1;
816
817 /* terminate key */
818 temp[0] = '\0';
819
820 /* skip whitespace after operator */
821 while (isspace(linepos[0]))
822 linepos++;
823 if (linepos[0] == '\0')
824 return -1;
825
826 /* get the value */
827 if (linepos[0] == '"')
828 linepos++;
829 else
830 return -1;
831 *value = linepos;
832
833 /* terminate */
834 temp = strchr(linepos, '"');
835 if (!temp)
836 return -1;
837 temp[0] = '\0';
838 temp++;
912541b0
KS		 839
840 /* move line to next key */
841 *line = temp;
842 return 0;
6880b25d 843}
95776dc6 844
6880b25d 845/* extract possible KEY{attr} */
9ec6e95b 846static const char *get_key_attribute(struct udev *udev, char *str) {
912541b0
KS		 847 char *pos;
848 char *attr;
849
850 attr = strchr(str, '{');
851 if (attr != NULL) {
852 attr++;
853 pos = strchr(attr, '}');
854 if (pos == NULL) {
9f6445e3 855 log_error("missing closing brace for format");
912541b0
KS		 856 return NULL;
857 }
858 pos[0] = '\0';
912541b0
KS		 859 return attr;
860 }
861 return NULL;
6880b25d 862}
95776dc6 863
0ef254d5 864static int rule_add_key(struct rule_tmp *rule_tmp, enum token_type type,
912541b0 865 enum operation_type op,
9ec6e95b 866 const char *value, const void *data) {
912541b0
KS		 867 struct token *token = &rule_tmp->token[rule_tmp->token_cur];
868 const char *attr = NULL;
869
29804cc1 870 memzero(token, sizeof(struct token));
912541b0
KS		 871
872 switch (type) {
873 case TK_M_ACTION:
874 case TK_M_DEVPATH:
875 case TK_M_KERNEL:
876 case TK_M_SUBSYSTEM:
877 case TK_M_DRIVER:
878 case TK_M_WAITFOR:
879 case TK_M_DEVLINK:
880 case TK_M_NAME:
881 case TK_M_KERNELS:
882 case TK_M_SUBSYSTEMS:
883 case TK_M_DRIVERS:
884 case TK_M_TAGS:
885 case TK_M_PROGRAM:
886 case TK_M_IMPORT_FILE:
887 case TK_M_IMPORT_PROG:
888 case TK_M_IMPORT_DB:
889 case TK_M_IMPORT_CMDLINE:
890 case TK_M_IMPORT_PARENT:
891 case TK_M_RESULT:
892 case TK_A_OWNER:
893 case TK_A_GROUP:
894 case TK_A_MODE:
8a173387 895 case TK_A_DEVLINK:
912541b0
KS		 896 case TK_A_NAME:
897 case TK_A_GOTO:
898 case TK_M_TAG:
899 case TK_A_TAG:
d6f116a7 900 case TK_A_STATIC_NODE:
915bf0f6 901 token->key.value_off = rules_add_string(rule_tmp->rules, value);
912541b0
KS		 902 break;
903 case TK_M_IMPORT_BUILTIN:
915bf0f6 904 token->key.value_off = rules_add_string(rule_tmp->rules, value);
912541b0
KS		 905 token->key.builtin_cmd = *(enum udev_builtin_cmd *)data;
906 break;
907 case TK_M_ENV:
908 case TK_M_ATTR:
909 case TK_M_ATTRS:
910 case TK_A_ATTR:
911 case TK_A_ENV:
c26547d6 912 case TK_A_SECLABEL:
912541b0 913 attr = data;
915bf0f6
KS		 914 token->key.value_off = rules_add_string(rule_tmp->rules, value);
915 token->key.attr_off = rules_add_string(rule_tmp->rules, attr);
912541b0 916 break;
912541b0 917 case TK_M_TEST:
915bf0f6 918 token->key.value_off = rules_add_string(rule_tmp->rules, value);
912541b0
KS		 919 if (data != NULL)
920 token->key.mode = *(mode_t *)data;
921 break;
922 case TK_A_STRING_ESCAPE_NONE:
923 case TK_A_STRING_ESCAPE_REPLACE:
924 case TK_A_DB_PERSIST:
925 break;
83cd6b75 926 case TK_A_RUN_BUILTIN:
83cd6b75 927 case TK_A_RUN_PROGRAM:
4590cfe4 928 token->key.builtin_cmd = *(enum udev_builtin_cmd *)data;
915bf0f6 929 token->key.value_off = rules_add_string(rule_tmp->rules, value);
912541b0
KS		 930 break;
931 case TK_A_INOTIFY_WATCH:
932 case TK_A_DEVLINK_PRIO:
933 token->key.devlink_prio = *(int *)data;
934 break;
935 case TK_A_OWNER_ID:
936 token->key.uid = *(uid_t *)data;
937 break;
938 case TK_A_GROUP_ID:
939 token->key.gid = *(gid_t *)data;
940 break;
941 case TK_A_MODE_ID:
942 token->key.mode = *(mode_t *)data;
943 break;
912541b0
KS		 944 case TK_RULE:
945 case TK_M_PARENTS_MIN:
946 case TK_M_PARENTS_MAX:
947 case TK_M_MAX:
948 case TK_END:
949 case TK_UNSET:
9f6445e3 950 log_error("wrong type %u", type);
912541b0
KS		 951 return -1;
952 }
953
954 if (value != NULL && type < TK_M_MAX) {
955 /* check if we need to split or call fnmatch() while matching rules */
956 enum string_glob_type glob;
957 int has_split;
958 int has_glob;
959
960 has_split = (strchr(value, '|') != NULL);
e3e0314b 961 has_glob = string_is_glob(value);
912541b0
KS		 962 if (has_split && has_glob) {
963 glob = GL_SPLIT_GLOB;
964 } else if (has_split) {
965 glob = GL_SPLIT;
966 } else if (has_glob) {
33502ffe 967 if (streq(value, "?*"))
912541b0
KS		 968 glob = GL_SOMETHING;
969 else
970 glob = GL_GLOB;
971 } else {
972 glob = GL_PLAIN;
973 }
974 token->key.glob = glob;
975 }
976
977 if (value != NULL && type > TK_M_MAX) {
978 /* check if assigned value has substitution chars */
979 if (value[0] == '[')
980 token->key.subst = SB_SUBSYS;
981 else if (strchr(value, '%') != NULL || strchr(value, '$') != NULL)
982 token->key.subst = SB_FORMAT;
983 else
984 token->key.subst = SB_NONE;
985 }
986
987 if (attr != NULL) {
d6f116a7 988 /* check if property/attribute name has substitution chars */
912541b0
KS		 989 if (attr[0] == '[')
990 token->key.attrsubst = SB_SUBSYS;
991 else if (strchr(attr, '%') != NULL || strchr(attr, '$') != NULL)
992 token->key.attrsubst = SB_FORMAT;
993 else
994 token->key.attrsubst = SB_NONE;
995 }
996
997 token->key.type = type;
998 token->key.op = op;
999 rule_tmp->token_cur++;
8fef0ff2 1000 if (rule_tmp->token_cur >= ELEMENTSOF(rule_tmp->token)) {
9f6445e3 1001 log_error("temporary rule array too small");
912541b0
KS		 1002 return -1;
1003 }
1004 return 0;
6880b25d 1005}
e57e7bc1 1006
9ec6e95b 1007static int sort_token(struct udev_rules *rules, struct rule_tmp *rule_tmp) {
912541b0
KS		 1008 unsigned int i;
1009 unsigned int start = 0;
1010 unsigned int end = rule_tmp->token_cur;
1011
1012 for (i = 0; i < rule_tmp->token_cur; i++) {
1013 enum token_type next_val = TK_UNSET;
1014 unsigned int next_idx = 0;
1015 unsigned int j;
1016
1017 /* find smallest value */
1018 for (j = start; j < end; j++) {
1019 if (rule_tmp->token[j].type == TK_UNSET)
1020 continue;
1021 if (next_val == TK_UNSET || rule_tmp->token[j].type < next_val) {
1022 next_val = rule_tmp->token[j].type;
1023 next_idx = j;
1024 }
1025 }
1026
1027 /* add token and mark done */
1028 if (add_token(rules, &rule_tmp->token[next_idx]) != 0)
1029 return -1;
1030 rule_tmp->token[next_idx].type = TK_UNSET;
1031
1032 /* shrink range */
1033 if (next_idx == start)
1034 start++;
1035 if (next_idx+1 == end)
1036 end--;
1037 }
1038 return 0;
724257d9
GKH		 1039}
1040
6880b25d 1041static int add_rule(struct udev_rules *rules, char *line,
9ec6e95b 1042 const char *filename, unsigned int filename_off, unsigned int lineno) {
912541b0 1043 char *linepos;
04a9d3a0 1044 const char *attr;
912541b0
KS		 1045 struct rule_tmp rule_tmp;
1046
29804cc1 1047 memzero(&rule_tmp, sizeof(struct rule_tmp));
912541b0
KS		 1048 rule_tmp.rules = rules;
1049 rule_tmp.rule.type = TK_RULE;
775f8b3c
KS		 1050 /* the offset in the rule is limited to unsigned short */
1051 if (filename_off < USHRT_MAX)
1052 rule_tmp.rule.rule.filename_off = filename_off;
912541b0
KS		 1053 rule_tmp.rule.rule.filename_line = lineno;
1054
1055 linepos = line;
1056 for (;;) {
1057 char *key;
1058 char *value;
1059 enum operation_type op;
1060
e736cf35 1061 if (get_key(rules->udev, &linepos, &key, &op, &value) != 0) {
3cf0f8f7
DR		 1062 /* Avoid erroring on trailing whitespace. This is probably rare
1063 * so save the work for the error case instead of always trying
1064 * to strip the trailing whitespace with strstrip(). */
1065 while (isblank(*linepos))
1066 linepos++;
1067
e736cf35
DR		 1068 /* If we aren't at the end of the line, this is a parsing error.
1069 * Make a best effort to describe where the problem is. */
1291bc89
ZJS		 1070 if (*linepos != '\n') {
1071 char buf[2] = {linepos[1]};
1072 _cleanup_free_ char *tmp;
1073
1074 tmp = cescape(buf);
ff49bc32 1075 log_error("invalid key/value pair in file %s on line %u, starting at character %tu ('%s')",
1291bc89
ZJS		 1076 filename, lineno, linepos - line + 1, tmp);
1077 if (linepos[1] == '#')
75716dd8 1078 log_error("hint: comments can only start at beginning of line");
1291bc89 1079 }
912541b0 1080 break;
e736cf35 1081 }
912541b0 1082
33502ffe 1083 if (streq(key, "ACTION")) {
912541b0 1084 if (op > OP_MATCH_MAX) {
9f6445e3 1085 log_error("invalid ACTION operation");
912541b0
KS		 1086 goto invalid;
1087 }
1088 rule_add_key(&rule_tmp, TK_M_ACTION, op, value, NULL);
1089 continue;
1090 }
1091
33502ffe 1092 if (streq(key, "DEVPATH")) {
912541b0 1093 if (op > OP_MATCH_MAX) {
9f6445e3 1094 log_error("invalid DEVPATH operation");
912541b0
KS		 1095 goto invalid;
1096 }
1097 rule_add_key(&rule_tmp, TK_M_DEVPATH, op, value, NULL);
1098 continue;
1099 }
1100
33502ffe 1101 if (streq(key, "KERNEL")) {
912541b0 1102 if (op > OP_MATCH_MAX) {
9f6445e3 1103 log_error("invalid KERNEL operation");
912541b0
KS		 1104 goto invalid;
1105 }
1106 rule_add_key(&rule_tmp, TK_M_KERNEL, op, value, NULL);
1107 continue;
1108 }
1109
33502ffe 1110 if (streq(key, "SUBSYSTEM")) {
912541b0 1111 if (op > OP_MATCH_MAX) {
9f6445e3 1112 log_error("invalid SUBSYSTEM operation");
912541b0
KS		 1113 goto invalid;
1114 }
1115 /* bus, class, subsystem events should all be the same */
33502ffe
KS		 1116 if (streq(value, "subsystem") ||
1117 streq(value, "bus") ||
1118 streq(value, "class")) {
1119 if (streq(value, "bus") || streq(value, "class"))
9f6445e3 1120 log_error("'%s' must be specified as 'subsystem' "
912541b0
KS		 1121 "please fix it in %s:%u", value, filename, lineno);
1122 rule_add_key(&rule_tmp, TK_M_SUBSYSTEM, op, "subsystem|class|bus", NULL);
1123 } else
1124 rule_add_key(&rule_tmp, TK_M_SUBSYSTEM, op, value, NULL);
1125 continue;
1126 }
1127
33502ffe 1128 if (streq(key, "DRIVER")) {
912541b0 1129 if (op > OP_MATCH_MAX) {
9f6445e3 1130 log_error("invalid DRIVER operation");
912541b0
KS		 1131 goto invalid;
1132 }
1133 rule_add_key(&rule_tmp, TK_M_DRIVER, op, value, NULL);
1134 continue;
1135 }
1136
33502ffe 1137 if (startswith(key, "ATTR{")) {
f8294e41 1138 attr = get_key_attribute(rules->udev, key + strlen("ATTR"));
912541b0 1139 if (attr == NULL) {
9f6445e3 1140 log_error("error parsing ATTR attribute");
912541b0
KS		 1141 goto invalid;
1142 }
8e3ba377
DH		 1143 if (op == OP_REMOVE) {
1144 log_error("invalid ATTR operation");
1145 goto invalid;
1146 }
912541b0
KS		 1147 if (op < OP_MATCH_MAX) {
1148 rule_add_key(&rule_tmp, TK_M_ATTR, op, value, attr);
1149 } else {
1150 rule_add_key(&rule_tmp, TK_A_ATTR, op, value, attr);
1151 }
1152 continue;
1153 }
1154
c26547d6 1155 if (startswith(key, "SECLABEL{")) {
f8294e41 1156 attr = get_key_attribute(rules->udev, key + strlen("SECLABEL"));
c26547d6 1157 if (!attr) {
9f6445e3 1158 log_error("error parsing SECLABEL attribute");
c26547d6
KS		 1159 goto invalid;
1160 }
8e3ba377
DH		 1161 if (op == OP_REMOVE) {
1162 log_error("invalid SECLABEL operation");
1163 goto invalid;
1164 }
c26547d6
KS		 1165
1166 rule_add_key(&rule_tmp, TK_A_SECLABEL, op, value, attr);
1167 continue;
1168 }
1169
33502ffe 1170 if (streq(key, "KERNELS")) {
912541b0 1171 if (op > OP_MATCH_MAX) {
9f6445e3 1172 log_error("invalid KERNELS operation");
912541b0
KS		 1173 goto invalid;
1174 }
1175 rule_add_key(&rule_tmp, TK_M_KERNELS, op, value, NULL);
1176 continue;
1177 }
1178
33502ffe 1179 if (streq(key, "SUBSYSTEMS")) {
912541b0 1180 if (op > OP_MATCH_MAX) {
9f6445e3 1181 log_error("invalid SUBSYSTEMS operation");
912541b0
KS		 1182 goto invalid;
1183 }
1184 rule_add_key(&rule_tmp, TK_M_SUBSYSTEMS, op, value, NULL);
1185 continue;
1186 }
1187
33502ffe 1188 if (streq(key, "DRIVERS")) {
912541b0 1189 if (op > OP_MATCH_MAX) {
9f6445e3 1190 log_error("invalid DRIVERS operation");
912541b0
KS		 1191 goto invalid;
1192 }
1193 rule_add_key(&rule_tmp, TK_M_DRIVERS, op, value, NULL);
1194 continue;
1195 }
1196
33502ffe 1197 if (startswith(key, "ATTRS{")) {
912541b0 1198 if (op > OP_MATCH_MAX) {
9f6445e3 1199 log_error("invalid ATTRS operation");
912541b0
KS		 1200 goto invalid;
1201 }
f8294e41 1202 attr = get_key_attribute(rules->udev, key + strlen("ATTRS"));
912541b0 1203 if (attr == NULL) {
9f6445e3 1204 log_error("error parsing ATTRS attribute");
912541b0
KS		 1205 goto invalid;
1206 }
33502ffe 1207 if (startswith(attr, "device/"))
baa30fbc 1208 log_error("the 'device' link may not be available in a future kernel, "
912541b0
KS		 1209 "please fix it in %s:%u", filename, lineno);
1210 else if (strstr(attr, "../") != NULL)
baa30fbc 1211 log_error("do not reference parent sysfs directories directly, "
912541b0
KS		 1212 "it may break with a future kernel, please fix it in %s:%u", filename, lineno);
1213 rule_add_key(&rule_tmp, TK_M_ATTRS, op, value, attr);
1214 continue;
1215 }
1216
33502ffe 1217 if (streq(key, "TAGS")) {
912541b0 1218 if (op > OP_MATCH_MAX) {
9f6445e3 1219 log_error("invalid TAGS operation");
912541b0
KS		 1220 goto invalid;
1221 }
1222 rule_add_key(&rule_tmp, TK_M_TAGS, op, value, NULL);
1223 continue;
1224 }
1225
33502ffe 1226 if (startswith(key, "ENV{")) {
f8294e41 1227 attr = get_key_attribute(rules->udev, key + strlen("ENV"));
912541b0 1228 if (attr == NULL) {
9f6445e3 1229 log_error("error parsing ENV attribute");
912541b0
KS		 1230 goto invalid;
1231 }
8e3ba377
DH		 1232 if (op == OP_REMOVE) {
1233 log_error("invalid ENV operation");
1234 goto invalid;
1235 }
912541b0
KS		 1236 if (op < OP_MATCH_MAX) {
1237 if (rule_add_key(&rule_tmp, TK_M_ENV, op, value, attr) != 0)
1238 goto invalid;
1239 } else {
1240 static const char *blacklist[] = {
1241 "ACTION",
1242 "SUBSYSTEM",
1243 "DEVTYPE",
1244 "MAJOR",
1245 "MINOR",
1246 "DRIVER",
1247 "IFINDEX",
1248 "DEVNAME",
1249 "DEVLINKS",
1250 "DEVPATH",
1251 "TAGS",
1252 };
1253 unsigned int i;
1254
395ea978
KS		 1255 for (i = 0; i < ELEMENTSOF(blacklist); i++) {
1256 if (!streq(attr, blacklist[i]))
912541b0 1257 continue;
9f6445e3 1258 log_error("invalid ENV attribute, '%s' can not be set %s:%u", attr, filename, lineno);
395ea978
KS		 1259 goto invalid;
1260 }
912541b0
KS		 1261 if (rule_add_key(&rule_tmp, TK_A_ENV, op, value, attr) != 0)
1262 goto invalid;
1263 }
1264 continue;
1265 }
1266
33502ffe 1267 if (streq(key, "TAG")) {
912541b0
KS		 1268 if (op < OP_MATCH_MAX)
1269 rule_add_key(&rule_tmp, TK_M_TAG, op, value, NULL);
1270 else
1271 rule_add_key(&rule_tmp, TK_A_TAG, op, value, NULL);
1272 continue;
1273 }
1274
33502ffe 1275 if (streq(key, "PROGRAM")) {
8e3ba377
DH		 1276 if (op == OP_REMOVE) {
1277 log_error("invalid PROGRAM operation");
1278 goto invalid;
1279 }
912541b0
KS		 1280 rule_add_key(&rule_tmp, TK_M_PROGRAM, op, value, NULL);
1281 continue;
1282 }
1283
33502ffe 1284 if (streq(key, "RESULT")) {
912541b0 1285 if (op > OP_MATCH_MAX) {
9f6445e3 1286 log_error("invalid RESULT operation");
912541b0
KS		 1287 goto invalid;
1288 }
1289 rule_add_key(&rule_tmp, TK_M_RESULT, op, value, NULL);
1290 continue;
1291 }
1292
33502ffe 1293 if (startswith(key, "IMPORT")) {
f8294e41 1294 attr = get_key_attribute(rules->udev, key + strlen("IMPORT"));
912541b0 1295 if (attr == NULL) {
9f6445e3 1296 log_error("IMPORT{} type missing, ignoring IMPORT %s:%u", filename, lineno);
912541b0
KS		 1297 continue;
1298 }
8e3ba377
DH		 1299 if (op == OP_REMOVE) {
1300 log_error("invalid IMPORT operation");
1301 goto invalid;
1302 }
33502ffe 1303 if (streq(attr, "program")) {
912541b0
KS		 1304 /* find known built-in command */
1305 if (value[0] != '/') {
1306 enum udev_builtin_cmd cmd;
1307
1308 cmd = udev_builtin_lookup(value);
1309 if (cmd < UDEV_BUILTIN_MAX) {
9f6445e3 1310 log_debug("IMPORT found builtin '%s', replacing %s:%u",
baa30fbc 1311 value, filename, lineno);
912541b0
KS		 1312 rule_add_key(&rule_tmp, TK_M_IMPORT_BUILTIN, op, value, &cmd);
1313 continue;
1314 }
1315 }
912541b0 1316 rule_add_key(&rule_tmp, TK_M_IMPORT_PROG, op, value, NULL);
33502ffe 1317 } else if (streq(attr, "builtin")) {
912541b0
KS		 1318 enum udev_builtin_cmd cmd = udev_builtin_lookup(value);
1319
912541b0
KS		 1320 if (cmd < UDEV_BUILTIN_MAX)
1321 rule_add_key(&rule_tmp, TK_M_IMPORT_BUILTIN, op, value, &cmd);
1322 else
9f6445e3 1323 log_error("IMPORT{builtin}: '%s' unknown %s:%u", value, filename, lineno);
33502ffe 1324 } else if (streq(attr, "file")) {
912541b0 1325 rule_add_key(&rule_tmp, TK_M_IMPORT_FILE, op, value, NULL);
33502ffe 1326 } else if (streq(attr, "db")) {
912541b0 1327 rule_add_key(&rule_tmp, TK_M_IMPORT_DB, op, value, NULL);
33502ffe 1328 } else if (streq(attr, "cmdline")) {
912541b0 1329 rule_add_key(&rule_tmp, TK_M_IMPORT_CMDLINE, op, value, NULL);
33502ffe 1330 } else if (streq(attr, "parent")) {
912541b0 1331 rule_add_key(&rule_tmp, TK_M_IMPORT_PARENT, op, value, NULL);
83cd6b75 1332 } else
9f6445e3 1333 log_error("IMPORT{} unknown type, ignoring IMPORT %s:%u", filename, lineno);
912541b0
KS		 1334 continue;
1335 }
1336
33502ffe 1337 if (startswith(key, "TEST")) {
912541b0
KS		 1338 mode_t mode = 0;
1339
1340 if (op > OP_MATCH_MAX) {
9f6445e3 1341 log_error("invalid TEST operation");
912541b0
KS		 1342 goto invalid;
1343 }
f8294e41 1344 attr = get_key_attribute(rules->udev, key + strlen("TEST"));
912541b0
KS		 1345 if (attr != NULL) {
1346 mode = strtol(attr, NULL, 8);
1347 rule_add_key(&rule_tmp, TK_M_TEST, op, value, &mode);
1348 } else {
1349 rule_add_key(&rule_tmp, TK_M_TEST, op, value, NULL);
1350 }
1351 continue;
1352 }
1353
33502ffe 1354 if (startswith(key, "RUN")) {
f8294e41 1355 attr = get_key_attribute(rules->udev, key + strlen("RUN"));
83cd6b75
KS		 1356 if (attr == NULL)
1357 attr = "program";
8e3ba377
DH		 1358 if (op == OP_REMOVE) {
1359 log_error("invalid RUN operation");
1360 goto invalid;
1361 }
83cd6b75 1362
33502ffe 1363 if (streq(attr, "builtin")) {
83cd6b75
KS		 1364 enum udev_builtin_cmd cmd = udev_builtin_lookup(value);
1365
1366 if (cmd < UDEV_BUILTIN_MAX)
1367 rule_add_key(&rule_tmp, TK_A_RUN_BUILTIN, op, value, &cmd);
1368 else
ec3281d3 1369 log_error("RUN{builtin}: '%s' unknown %s:%u", value, filename, lineno);
33502ffe 1370 } else if (streq(attr, "program")) {
83cd6b75
KS		 1371 enum udev_builtin_cmd cmd = UDEV_BUILTIN_MAX;
1372
83cd6b75
KS		 1373 rule_add_key(&rule_tmp, TK_A_RUN_PROGRAM, op, value, &cmd);
1374 } else {
9f6445e3 1375 log_error("RUN{} unknown type, ignoring RUN %s:%u", filename, lineno);
83cd6b75
KS		 1376 }
1377
912541b0
KS		 1378 continue;
1379 }
1380
33502ffe 1381 if (streq(key, "WAIT_FOR") || streq(key, "WAIT_FOR_SYSFS")) {
8e3ba377
DH		 1382 if (op == OP_REMOVE) {
1383 log_error("invalid WAIT_FOR/WAIT_FOR_SYSFS operation");
1384 goto invalid;
1385 }
912541b0
KS		 1386 rule_add_key(&rule_tmp, TK_M_WAITFOR, 0, value, NULL);
1387 continue;
1388 }
1389
33502ffe 1390 if (streq(key, "LABEL")) {
8e3ba377
DH		 1391 if (op == OP_REMOVE) {
1392 log_error("invalid LABEL operation");
1393 goto invalid;
1394 }
915bf0f6 1395 rule_tmp.rule.rule.label_off = rules_add_string(rules, value);
912541b0
KS		 1396 continue;
1397 }
1398
33502ffe 1399 if (streq(key, "GOTO")) {
8e3ba377
DH		 1400 if (op == OP_REMOVE) {
1401 log_error("invalid GOTO operation");
1402 goto invalid;
1403 }
912541b0
KS		 1404 rule_add_key(&rule_tmp, TK_A_GOTO, 0, value, NULL);
1405 continue;
1406 }
1407
33502ffe 1408 if (startswith(key, "NAME")) {
8e3ba377
DH		 1409 if (op == OP_REMOVE) {
1410 log_error("invalid NAME operation");
1411 goto invalid;
1412 }
912541b0
KS		 1413 if (op < OP_MATCH_MAX) {
1414 rule_add_key(&rule_tmp, TK_M_NAME, op, value, NULL);
1415 } else {
33502ffe 1416 if (streq(value, "%k")) {
baa30fbc 1417 log_error("NAME=\"%%k\" is ignored, because it breaks kernel supplied names, "
912541b0
KS		 1418 "please remove it from %s:%u\n", filename, lineno);
1419 continue;
1420 }
1421 if (value[0] == '\0') {
baa30fbc
KS		 1422 log_debug("NAME=\"\" is ignored, because udev will not delete any device nodes, "
1423 "please remove it from %s:%u\n", filename, lineno);
912541b0
KS		 1424 continue;
1425 }
1426 rule_add_key(&rule_tmp, TK_A_NAME, op, value, NULL);
1427 }
1428 rule_tmp.rule.rule.can_set_name = true;
1429 continue;
1430 }
1431
8a173387 1432 if (streq(key, "SYMLINK")) {
8e3ba377
DH		 1433 if (op == OP_REMOVE) {
1434 log_error("invalid SYMLINK operation");
1435 goto invalid;
1436 }
8a173387 1437 if (op < OP_MATCH_MAX)
912541b0 1438 rule_add_key(&rule_tmp, TK_M_DEVLINK, op, value, NULL);
8a173387
KS		 1439 else
1440 rule_add_key(&rule_tmp, TK_A_DEVLINK, op, value, NULL);
912541b0
KS		 1441 rule_tmp.rule.rule.can_set_name = true;
1442 continue;
1443 }
1444
33502ffe 1445 if (streq(key, "OWNER")) {
912541b0
KS		 1446 uid_t uid;
1447 char *endptr;
1448
8e3ba377
DH		 1449 if (op == OP_REMOVE) {
1450 log_error("invalid OWNER operation");
1451 goto invalid;
1452 }
1453
912541b0
KS		 1454 uid = strtoul(value, &endptr, 10);
1455 if (endptr[0] == '\0') {
1456 rule_add_key(&rule_tmp, TK_A_OWNER_ID, op, NULL, &uid);
1457 } else if ((rules->resolve_names > 0) && strchr("$%", value[0]) == NULL) {
1458 uid = add_uid(rules, value);
1459 rule_add_key(&rule_tmp, TK_A_OWNER_ID, op, NULL, &uid);
1460 } else if (rules->resolve_names >= 0) {
1461 rule_add_key(&rule_tmp, TK_A_OWNER, op, value, NULL);
1462 }
1463 rule_tmp.rule.rule.can_set_name = true;
1464 continue;
1465 }
1466
33502ffe 1467 if (streq(key, "GROUP")) {
912541b0
KS		 1468 gid_t gid;
1469 char *endptr;
1470
8e3ba377
DH		 1471 if (op == OP_REMOVE) {
1472 log_error("invalid GROUP operation");
1473 goto invalid;
1474 }
1475
912541b0
KS		 1476 gid = strtoul(value, &endptr, 10);
1477 if (endptr[0] == '\0') {
1478 rule_add_key(&rule_tmp, TK_A_GROUP_ID, op, NULL, &gid);
1479 } else if ((rules->resolve_names > 0) && strchr("$%", value[0]) == NULL) {
1480 gid = add_gid(rules, value);
1481 rule_add_key(&rule_tmp, TK_A_GROUP_ID, op, NULL, &gid);
1482 } else if (rules->resolve_names >= 0) {
1483 rule_add_key(&rule_tmp, TK_A_GROUP, op, value, NULL);
1484 }
1485 rule_tmp.rule.rule.can_set_name = true;
1486 continue;
1487 }
1488
33502ffe 1489 if (streq(key, "MODE")) {
912541b0
KS		 1490 mode_t mode;
1491 char *endptr;
1492
8e3ba377
DH		 1493 if (op == OP_REMOVE) {
1494 log_error("invalid MODE operation");
1495 goto invalid;
1496 }
1497
912541b0
KS		 1498 mode = strtol(value, &endptr, 8);
1499 if (endptr[0] == '\0')
1500 rule_add_key(&rule_tmp, TK_A_MODE_ID, op, NULL, &mode);
1501 else
1502 rule_add_key(&rule_tmp, TK_A_MODE, op, value, NULL);
1503 rule_tmp.rule.rule.can_set_name = true;
1504 continue;
1505 }
1506
33502ffe 1507 if (streq(key, "OPTIONS")) {
912541b0
KS		 1508 const char *pos;
1509
8e3ba377
DH		 1510 if (op == OP_REMOVE) {
1511 log_error("invalid OPTIONS operation");
1512 goto invalid;
1513 }
1514
912541b0
KS		 1515 pos = strstr(value, "link_priority=");
1516 if (pos != NULL) {
1517 int prio = atoi(&pos[strlen("link_priority=")]);
1518
1519 rule_add_key(&rule_tmp, TK_A_DEVLINK_PRIO, op, NULL, &prio);
912541b0
KS		 1520 }
1521
9f20a8a3 1522 pos = strstr(value, "string_escape=");
912541b0
KS		 1523 if (pos != NULL) {
1524 pos = &pos[strlen("string_escape=")];
33502ffe 1525 if (startswith(pos, "none"))
912541b0 1526 rule_add_key(&rule_tmp, TK_A_STRING_ESCAPE_NONE, op, NULL, NULL);
33502ffe 1527 else if (startswith(pos, "replace"))
912541b0
KS		 1528 rule_add_key(&rule_tmp, TK_A_STRING_ESCAPE_REPLACE, op, NULL, NULL);
1529 }
1530
1531 pos = strstr(value, "db_persist");
1532 if (pos != NULL)
1533 rule_add_key(&rule_tmp, TK_A_DB_PERSIST, op, NULL, NULL);
1534
1535 pos = strstr(value, "nowatch");
1536 if (pos != NULL) {
1537 const int off = 0;
1538
1539 rule_add_key(&rule_tmp, TK_A_INOTIFY_WATCH, op, NULL, &off);
912541b0
KS		 1540 } else {
1541 pos = strstr(value, "watch");
1542 if (pos != NULL) {
1543 const int on = 1;
1544
1545 rule_add_key(&rule_tmp, TK_A_INOTIFY_WATCH, op, NULL, &on);
912541b0
KS		 1546 }
1547 }
1548
1549 pos = strstr(value, "static_node=");
1550 if (pos != NULL) {
1551 rule_add_key(&rule_tmp, TK_A_STATIC_NODE, op, &pos[strlen("static_node=")], NULL);
1552 rule_tmp.rule.rule.has_static_node = true;
1553 }
1554
1555 continue;
1556 }
1557
9f6445e3 1558 log_error("unknown key '%s' in %s:%u", key, filename, lineno);
912541b0
KS		 1559 goto invalid;
1560 }
1561
1562 /* add rule token */
1563 rule_tmp.rule.rule.token_count = 1 + rule_tmp.token_cur;
1564 if (add_token(rules, &rule_tmp.rule) != 0)
1565 goto invalid;
1566
1567 /* add tokens to list, sorted by type */
1568 if (sort_token(rules, &rule_tmp) != 0)
1569 goto invalid;
1570
1571 return 0;
c7521974 1572invalid:
9f6445e3 1573 log_error("invalid rule '%s:%u'", filename, lineno);
912541b0 1574 return -1;
c7521974
KS		 1575}
1576
9ec6e95b 1577static int parse_file(struct udev_rules *rules, const char *filename) {
6c8aaf0c 1578 _cleanup_fclose_ FILE *f = NULL;
912541b0 1579 unsigned int first_token;
775f8b3c 1580 unsigned int filename_off;
912541b0
KS		 1581 char line[UTIL_LINE_SIZE];
1582 int line_nr = 0;
1583 unsigned int i;
1584
ed88bcfb
ZJS		 1585 f = fopen(filename, "re");
1586 if (!f) {
1587 if (errno == ENOENT)
1588 return 0;
1589 else
1590 return -errno;
775f8b3c 1591 }
912541b0 1592
ed88bcfb
ZJS		 1593 if (null_or_empty_fd(fileno(f))) {
1594 log_debug("Skipping empty file: %s", filename);
1595 return 0;
1596 } else
1597 log_debug("Reading rules file: %s", filename);
912541b0
KS		 1598
1599 first_token = rules->token_cur;
915bf0f6 1600 filename_off = rules_add_string(rules, filename);
912541b0
KS		 1601
1602 while (fgets(line, sizeof(line), f) != NULL) {
1603 char *key;
1604 size_t len;
1605
1606 /* skip whitespace */
1607 line_nr++;
1608 key = line;
1609 while (isspace(key[0]))
1610 key++;
1611
1612 /* comment */
1613 if (key[0] == '#')
1614 continue;
1615
1616 len = strlen(line);
1617 if (len < 3)
1618 continue;
1619
1620 /* continue reading if backslash+newline is found */
1621 while (line[len-2] == '\\') {
1622 if (fgets(&line[len-2], (sizeof(line)-len)+2, f) == NULL)
1623 break;
1624 if (strlen(&line[len-2]) < 2)
1625 break;
1626 line_nr++;
1627 len = strlen(line);
1628 }
1629
1630 if (len+1 >= sizeof(line)) {
9f6445e3 1631 log_error("line too long '%s':%u, ignored", filename, line_nr);
912541b0
KS		 1632 continue;
1633 }
1634 add_rule(rules, key, filename, filename_off, line_nr);
1635 }
912541b0
KS		 1636
1637 /* link GOTOs to LABEL rules in this file to be able to fast-forward */
1638 for (i = first_token+1; i < rules->token_cur; i++) {
1639 if (rules->tokens[i].type == TK_A_GOTO) {
915bf0f6 1640 char *label = rules_str(rules, rules->tokens[i].key.value_off);
912541b0
KS		 1641 unsigned int j;
1642
1643 for (j = i+1; j < rules->token_cur; j++) {
1644 if (rules->tokens[j].type != TK_RULE)
1645 continue;
1646 if (rules->tokens[j].rule.label_off == 0)
1647 continue;
915bf0f6 1648 if (!streq(label, rules_str(rules, rules->tokens[j].rule.label_off)))
912541b0
KS		 1649 continue;
1650 rules->tokens[i].key.rule_goto = j;
1651 break;
1652 }
1653 if (rules->tokens[i].key.rule_goto == 0)
9f6445e3 1654 log_error("GOTO '%s' has no matching label in: '%s'", label, filename);
912541b0
KS		 1655 }
1656 }
1657 return 0;
c7521974
KS		 1658}
1659
9ec6e95b 1660struct udev_rules *udev_rules_new(struct udev *udev, int resolve_names) {
912541b0
KS		 1661 struct udev_rules *rules;
1662 struct udev_list file_list;
912541b0 1663 struct token end_token;
775f8b3c
KS		 1664 char **files, **f;
1665 int r;
912541b0 1666
955d98c9 1667 rules = new0(struct udev_rules, 1);
912541b0
KS		 1668 if (rules == NULL)
1669 return NULL;
1670 rules->udev = udev;
1671 rules->resolve_names = resolve_names;
1672 udev_list_init(udev, &file_list, true);
1673
1674 /* init token array and string buffer */
1675 rules->tokens = malloc(PREALLOC_TOKEN * sizeof(struct token));
0820a4f0
VP		 1676 if (rules->tokens == NULL)
1677 return udev_rules_unref(rules);
912541b0
KS		 1678 rules->token_max = PREALLOC_TOKEN;
1679
915bf0f6
KS		 1680 rules->strbuf = strbuf_new();
1681 if (!rules->strbuf)
0820a4f0
VP		 1682 return udev_rules_unref(rules);
1683
3b8c1cb0
KS		 1684 udev_rules_check_timestamp(rules);
1685
2ad8416d 1686 r = conf_files_list_strv(&files, ".rules", NULL, rules_dirs);
775f8b3c 1687 if (r < 0) {
da927ba9 1688 log_error_errno(r, "failed to enumerate rules files: %m");
0820a4f0 1689 return udev_rules_unref(rules);
912541b0
KS		 1690 }
1691
775f8b3c
KS		 1692 /*
1693 * The offset value in the rules strct is limited; add all
1694 * rules file names to the beginning of the string buffer.
1695 */
1696 STRV_FOREACH(f, files)
915bf0f6 1697 rules_add_string(rules, *f);
912541b0 1698
775f8b3c
KS		 1699 STRV_FOREACH(f, files)
1700 parse_file(rules, *f);
1701
1702 strv_free(files);
912541b0 1703
29804cc1 1704 memzero(&end_token, sizeof(struct token));
912541b0
KS		 1705 end_token.type = TK_END;
1706 add_token(rules, &end_token);
9f6445e3 1707 log_debug("rules contain %zu bytes tokens (%u * %zu bytes), %zu bytes strings",
915bf0f6 1708 rules->token_max * sizeof(struct token), rules->token_max, sizeof(struct token), rules->strbuf->len);
912541b0 1709
915bf0f6 1710 /* cleanup temporary strbuf data */
9f6445e3 1711 log_debug("%zu strings (%zu bytes), %zu de-duplicated (%zu bytes), %zu trie nodes used",
915bf0f6
KS		 1712 rules->strbuf->in_count, rules->strbuf->in_len,
1713 rules->strbuf->dedup_count, rules->strbuf->dedup_len, rules->strbuf->nodes_count);
1714 strbuf_complete(rules->strbuf);
912541b0
KS		 1715
1716 /* cleanup uid/gid cache */
1717 free(rules->uids);
1718 rules->uids = NULL;
1719 rules->uids_cur = 0;
1720 rules->uids_max = 0;
1721 free(rules->gids);
1722 rules->gids = NULL;
1723 rules->gids_cur = 0;
1724 rules->gids_max = 0;
1725
1726 dump_rules(rules);
1727 return rules;
c7521974
KS		 1728}
1729
9ec6e95b 1730struct udev_rules *udev_rules_unref(struct udev_rules *rules) {
912541b0
KS		 1731 if (rules == NULL)
1732 return NULL;
1733 free(rules->tokens);
915bf0f6 1734 strbuf_cleanup(rules->strbuf);
912541b0
KS		 1735 free(rules->uids);
1736 free(rules->gids);
1737 free(rules);
1738 return NULL;
c7521974 1739}
6880b25d 1740
9ec6e95b 1741bool udev_rules_check_timestamp(struct udev_rules *rules) {
5c11fbe3
KS		 1742 if (!rules)
1743 return false;
1744
2ad8416d 1745 return paths_check_timestamp(rules_dirs, &rules->dirs_ts_usec, true);
6ada823a
KS		 1746}
1747
9ec6e95b 1748static int match_key(struct udev_rules *rules, struct token *token, const char *val) {
915bf0f6 1749 char *key_value = rules_str(rules, token->key.value_off);
912541b0
KS		 1750 char *pos;
1751 bool match = false;
1752
1753 if (val == NULL)
1754 val = "";
1755
1756 switch (token->key.glob) {
1757 case GL_PLAIN:
33502ffe 1758 match = (streq(key_value, val));
912541b0
KS		 1759 break;
1760 case GL_GLOB:
1761 match = (fnmatch(key_value, val, 0) == 0);
1762 break;
1763 case GL_SPLIT:
1764 {
33502ffe 1765 const char *s;
912541b0
KS		 1766 size_t len;
1767
915bf0f6 1768 s = rules_str(rules, token->key.value_off);
912541b0
KS		 1769 len = strlen(val);
1770 for (;;) {
1771 const char *next;
1772
33502ffe 1773 next = strchr(s, '|');
912541b0 1774 if (next != NULL) {
33502ffe 1775 size_t matchlen = (size_t)(next - s);
912541b0 1776
641906e9 1777 match = (matchlen == len && strneq(s, val, matchlen));
912541b0
KS		 1778 if (match)
1779 break;
1780 } else {
33502ffe 1781 match = (streq(s, val));
912541b0
KS		 1782 break;
1783 }
33502ffe 1784 s = &next[1];
912541b0
KS		 1785 }
1786 break;
1787 }
1788 case GL_SPLIT_GLOB:
1789 {
1790 char value[UTIL_PATH_SIZE];
1791
d5a89d7d 1792 strscpy(value, sizeof(value), rules_str(rules, token->key.value_off));
912541b0
KS		 1793 key_value = value;
1794 while (key_value != NULL) {
1795 pos = strchr(key_value, '|');
1796 if (pos != NULL) {
1797 pos[0] = '\0';
1798 pos = &pos[1];
1799 }
912541b0
KS		 1800 match = (fnmatch(key_value, val, 0) == 0);
1801 if (match)
1802 break;
1803 key_value = pos;
1804 }
1805 break;
1806 }
1807 case GL_SOMETHING:
1808 match = (val[0] != '\0');
1809 break;
1810 case GL_UNSET:
1811 return -1;
1812 }
1813
baa30fbc 1814 if (match && (token->key.op == OP_MATCH))
912541b0 1815 return 0;
baa30fbc 1816 if (!match && (token->key.op == OP_NOMATCH))
912541b0 1817 return 0;
912541b0 1818 return -1;
6880b25d
KS		 1819}
1820
9ec6e95b 1821static int match_attr(struct udev_rules *rules, struct udev_device *dev, struct udev_event *event, struct token *cur) {
912541b0
KS		 1822 const char *name;
1823 char nbuf[UTIL_NAME_SIZE];
1824 const char *value;
1825 char vbuf[UTIL_NAME_SIZE];
1826 size_t len;
1827
915bf0f6 1828 name = rules_str(rules, cur->key.attr_off);
912541b0
KS		 1829 switch (cur->key.attrsubst) {
1830 case SB_FORMAT:
1831 udev_event_apply_format(event, name, nbuf, sizeof(nbuf));
1832 name = nbuf;
1833 /* fall through */
1834 case SB_NONE:
1835 value = udev_device_get_sysattr_value(dev, name);
1836 if (value == NULL)
1837 return -1;
1838 break;
1839 case SB_SUBSYS:
1840 if (util_resolve_subsys_kernel(event->udev, name, vbuf, sizeof(vbuf), 1) != 0)
1841 return -1;
1842 value = vbuf;
1843 break;
1844 default:
1845 return -1;
1846 }
1847
1848 /* remove trailing whitespace, if not asked to match for it */
1849 len = strlen(value);
1850 if (len > 0 && isspace(value[len-1])) {
1851 const char *key_value;
1852 size_t klen;
1853
915bf0f6 1854 key_value = rules_str(rules, cur->key.value_off);
912541b0
KS		 1855 klen = strlen(key_value);
1856 if (klen > 0 && !isspace(key_value[klen-1])) {
1857 if (value != vbuf) {
d5a89d7d 1858 strscpy(vbuf, sizeof(vbuf), value);
912541b0
KS		 1859 value = vbuf;
1860 }
1861 while (len > 0 && isspace(vbuf[--len]))
1862 vbuf[len] = '\0';
912541b0
KS		 1863 }
1864 }
1865
1866 return match_key(rules, cur, value);
6880b25d
KS		 1867}
1868
1869enum escape_type {
912541b0
KS		 1870 ESCAPE_UNSET,
1871 ESCAPE_NONE,
1872 ESCAPE_REPLACE,
6880b25d
KS		 1873};
1874
dd5eddd2
KS		 1875int udev_rules_apply_to_event(struct udev_rules *rules,
1876 struct udev_event *event,
1877 usec_t timeout_usec,
67117413 1878 usec_t timeout_warn_usec,
adeba500 1879 struct udev_list *properties_list,
dd5eddd2 1880 const sigset_t *sigmask) {
912541b0
KS		 1881 struct token *cur;
1882 struct token *rule;
1883 enum escape_type esc = ESCAPE_UNSET;
1884 bool can_set_name;
1885
1886 if (rules->tokens == NULL)
1887 return -1;
1888
33502ffe 1889 can_set_name = ((!streq(udev_device_get_action(event->dev), "remove")) &&
912541b0
KS		 1890 (major(udev_device_get_devnum(event->dev)) > 0 ||
1891 udev_device_get_ifindex(event->dev) > 0));
1892
1893 /* loop through token list, match, run actions or forward to next rule */
1894 cur = &rules->tokens[0];
1895 rule = cur;
1896 for (;;) {
1897 dump_token(rules, cur);
1898 switch (cur->type) {
1899 case TK_RULE:
1900 /* current rule */
1901 rule = cur;
1902 /* possibly skip rules which want to set NAME, SYMLINK, OWNER, GROUP, MODE */
1903 if (!can_set_name && rule->rule.can_set_name)
1904 goto nomatch;
1905 esc = ESCAPE_UNSET;
1906 break;
1907 case TK_M_ACTION:
1908 if (match_key(rules, cur, udev_device_get_action(event->dev)) != 0)
1909 goto nomatch;
1910 break;
1911 case TK_M_DEVPATH:
1912 if (match_key(rules, cur, udev_device_get_devpath(event->dev)) != 0)
1913 goto nomatch;
1914 break;
1915 case TK_M_KERNEL:
1916 if (match_key(rules, cur, udev_device_get_sysname(event->dev)) != 0)
1917 goto nomatch;
1918 break;
1919 case TK_M_DEVLINK: {
912541b0
KS		 1920 struct udev_list_entry *list_entry;
1921 bool match = false;
1922
1923 udev_list_entry_foreach(list_entry, udev_device_get_devlinks_list_entry(event->dev)) {
1924 const char *devlink;
1925
4cb72937 1926 devlink = udev_list_entry_get_name(list_entry) + strlen("/dev/");
912541b0
KS		 1927 if (match_key(rules, cur, devlink) == 0) {
1928 match = true;
1929 break;
1930 }
1931 }
1932 if (!match)
1933 goto nomatch;
1934 break;
1935 }
1936 case TK_M_NAME:
1937 if (match_key(rules, cur, event->name) != 0)
1938 goto nomatch;
1939 break;
1940 case TK_M_ENV: {
915bf0f6 1941 const char *key_name = rules_str(rules, cur->key.attr_off);
912541b0
KS		 1942 const char *value;
1943
1944 value = udev_device_get_property_value(event->dev, key_name);
adeba500
KS		 1945
1946 /* check global properties */
1947 if (!value && properties_list) {
1948 struct udev_list_entry *list_entry;
1949
1950 list_entry = udev_list_get_entry(properties_list);
1951 list_entry = udev_list_entry_get_by_name(list_entry, key_name);
1952 if (list_entry != NULL)
1953 value = udev_list_entry_get_value(list_entry);
1954 }
1955
1956 if (!value)
912541b0 1957 value = "";
912541b0
KS		 1958 if (match_key(rules, cur, value))
1959 goto nomatch;
1960 break;
1961 }
1962 case TK_M_TAG: {
1963 struct udev_list_entry *list_entry;
1964 bool match = false;
1965
1966 udev_list_entry_foreach(list_entry, udev_device_get_tags_list_entry(event->dev)) {
915bf0f6 1967 if (streq(rules_str(rules, cur->key.value_off), udev_list_entry_get_name(list_entry))) {
912541b0
KS		 1968 match = true;
1969 break;
1970 }
1971 }
1972 if (!match && (cur->key.op != OP_NOMATCH))
1973 goto nomatch;
1974 break;
1975 }
1976 case TK_M_SUBSYSTEM:
1977 if (match_key(rules, cur, udev_device_get_subsystem(event->dev)) != 0)
1978 goto nomatch;
1979 break;
1980 case TK_M_DRIVER:
1981 if (match_key(rules, cur, udev_device_get_driver(event->dev)) != 0)
1982 goto nomatch;
1983 break;
1984 case TK_M_WAITFOR: {
1985 char filename[UTIL_PATH_SIZE];
1986 int found;
1987
915bf0f6 1988 udev_event_apply_format(event, rules_str(rules, cur->key.value_off), filename, sizeof(filename));
912541b0
KS		 1989 found = (wait_for_file(event->dev, filename, 10) == 0);
1990 if (!found && (cur->key.op != OP_NOMATCH))
1991 goto nomatch;
1992 break;
1993 }
1994 case TK_M_ATTR:
1995 if (match_attr(rules, event->dev, event, cur) != 0)
1996 goto nomatch;
1997 break;
1998 case TK_M_KERNELS:
1999 case TK_M_SUBSYSTEMS:
2000 case TK_M_DRIVERS:
2001 case TK_M_ATTRS:
2002 case TK_M_TAGS: {
2003 struct token *next;
2004
2005 /* get whole sequence of parent matches */
2006 next = cur;
2007 while (next->type > TK_M_PARENTS_MIN && next->type < TK_M_PARENTS_MAX)
2008 next++;
2009
2010 /* loop over parents */
2011 event->dev_parent = event->dev;
2012 for (;;) {
2013 struct token *key;
2014
912541b0
KS		 2015 /* loop over sequence of parent match keys */
2016 for (key = cur; key < next; key++ ) {
2017 dump_token(rules, key);
2018 switch(key->type) {
2019 case TK_M_KERNELS:
2020 if (match_key(rules, key, udev_device_get_sysname(event->dev_parent)) != 0)
2021 goto try_parent;
2022 break;
2023 case TK_M_SUBSYSTEMS:
2024 if (match_key(rules, key, udev_device_get_subsystem(event->dev_parent)) != 0)
2025 goto try_parent;
2026 break;
2027 case TK_M_DRIVERS:
2028 if (match_key(rules, key, udev_device_get_driver(event->dev_parent)) != 0)
2029 goto try_parent;
2030 break;
2031 case TK_M_ATTRS:
2032 if (match_attr(rules, event->dev_parent, event, key) != 0)
2033 goto try_parent;
2034 break;
2035 case TK_M_TAGS: {
915bf0f6 2036 bool match = udev_device_has_tag(event->dev_parent, rules_str(rules, cur->key.value_off));
912541b0
KS		 2037
2038 if (match && key->key.op == OP_NOMATCH)
2039 goto try_parent;
2040 if (!match && key->key.op == OP_MATCH)
2041 goto try_parent;
2042 break;
2043 }
2044 default:
2045 goto nomatch;
2046 }
912541b0 2047 }
912541b0
KS		 2048 break;
2049
2050 try_parent:
2051 event->dev_parent = udev_device_get_parent(event->dev_parent);
2052 if (event->dev_parent == NULL)
2053 goto nomatch;
2054 }
2055 /* move behind our sequence of parent match keys */
2056 cur = next;
2057 continue;
2058 }
2059 case TK_M_TEST: {
2060 char filename[UTIL_PATH_SIZE];
2061 struct stat statbuf;
2062 int match;
2063
915bf0f6 2064 udev_event_apply_format(event, rules_str(rules, cur->key.value_off), filename, sizeof(filename));
912541b0
KS		 2065 if (util_resolve_subsys_kernel(event->udev, filename, filename, sizeof(filename), 0) != 0) {
2066 if (filename[0] != '/') {
2067 char tmp[UTIL_PATH_SIZE];
2068
d5a89d7d
KS		 2069 strscpy(tmp, sizeof(tmp), filename);
2070 strscpyl(filename, sizeof(filename),
912541b0
KS		 2071 udev_device_get_syspath(event->dev), "/", tmp, NULL);
2072 }
2073 }
2074 attr_subst_subdir(filename, sizeof(filename));
2075
2076 match = (stat(filename, &statbuf) == 0);
baa30fbc 2077 if (match && cur->key.mode > 0)
912541b0 2078 match = ((statbuf.st_mode & cur->key.mode) > 0);
912541b0
KS		 2079 if (match && cur->key.op == OP_NOMATCH)
2080 goto nomatch;
2081 if (!match && cur->key.op == OP_MATCH)
2082 goto nomatch;
2083 break;
2084 }
912541b0
KS		 2085 case TK_M_PROGRAM: {
2086 char program[UTIL_PATH_SIZE];
2087 char **envp;
209b031e 2088 char result[UTIL_LINE_SIZE];
912541b0
KS		 2089
2090 free(event->program_result);
2091 event->program_result = NULL;
915bf0f6 2092 udev_event_apply_format(event, rules_str(rules, cur->key.value_off), program, sizeof(program));
912541b0 2093 envp = udev_device_get_properties_envp(event->dev);
9f6445e3 2094 log_debug("PROGRAM '%s' %s:%u",
baa30fbc 2095 program,
915bf0f6 2096 rules_str(rules, rule->rule.filename_off),
baa30fbc 2097 rule->rule.filename_line);
912541b0 2098
67117413 2099 if (udev_event_spawn(event, timeout_usec, timeout_warn_usec, program, envp, sigmask, result, sizeof(result)) < 0) {
912541b0
KS		 2100 if (cur->key.op != OP_NOMATCH)
2101 goto nomatch;
2102 } else {
2103 int count;
2104
2105 util_remove_trailing_chars(result, '\n');
2106 if (esc == ESCAPE_UNSET || esc == ESCAPE_REPLACE) {
2107 count = util_replace_chars(result, UDEV_ALLOWED_CHARS_INPUT);
2108 if (count > 0)
9f6445e3 2109 log_debug("%i character(s) replaced" , count);
912541b0
KS		 2110 }
2111 event->program_result = strdup(result);
912541b0
KS		 2112 if (cur->key.op == OP_NOMATCH)
2113 goto nomatch;
2114 }
2115 break;
2116 }
2117 case TK_M_IMPORT_FILE: {
2118 char import[UTIL_PATH_SIZE];
2119
915bf0f6 2120 udev_event_apply_format(event, rules_str(rules, cur->key.value_off), import, sizeof(import));
912541b0
KS		 2121 if (import_file_into_properties(event->dev, import) != 0)
2122 if (cur->key.op != OP_NOMATCH)
2123 goto nomatch;
2124 break;
2125 }
2126 case TK_M_IMPORT_PROG: {
2127 char import[UTIL_PATH_SIZE];
2128
915bf0f6 2129 udev_event_apply_format(event, rules_str(rules, cur->key.value_off), import, sizeof(import));
9f6445e3 2130 log_debug("IMPORT '%s' %s:%u",
baa30fbc 2131 import,
915bf0f6 2132 rules_str(rules, rule->rule.filename_off),
baa30fbc 2133 rule->rule.filename_line);
912541b0 2134
67117413 2135 if (import_program_into_properties(event, timeout_usec, timeout_warn_usec, import, sigmask) != 0)
912541b0
KS		 2136 if (cur->key.op != OP_NOMATCH)
2137 goto nomatch;
2138 break;
2139 }
2140 case TK_M_IMPORT_BUILTIN: {
2141 char command[UTIL_PATH_SIZE];
2142
2143 if (udev_builtin_run_once(cur->key.builtin_cmd)) {
2144 /* check if we ran already */
2145 if (event->builtin_run & (1 << cur->key.builtin_cmd)) {
9f6445e3 2146 log_debug("IMPORT builtin skip '%s' %s:%u",
baa30fbc 2147 udev_builtin_name(cur->key.builtin_cmd),
915bf0f6 2148 rules_str(rules, rule->rule.filename_off),
baa30fbc 2149 rule->rule.filename_line);
912541b0
KS		 2150 /* return the result from earlier run */
2151 if (event->builtin_ret & (1 << cur->key.builtin_cmd))
2152 if (cur->key.op != OP_NOMATCH)
2153 goto nomatch;
2154 break;
2155 }
2156 /* mark as ran */
2157 event->builtin_run |= (1 << cur->key.builtin_cmd);
2158 }
2159
915bf0f6 2160 udev_event_apply_format(event, rules_str(rules, cur->key.value_off), command, sizeof(command));
9f6445e3 2161 log_debug("IMPORT builtin '%s' %s:%u",
baa30fbc 2162 udev_builtin_name(cur->key.builtin_cmd),
915bf0f6 2163 rules_str(rules, rule->rule.filename_off),
baa30fbc 2164 rule->rule.filename_line);
912541b0
KS		 2165
2166 if (udev_builtin_run(event->dev, cur->key.builtin_cmd, command, false) != 0) {
2167 /* remember failure */
9f6445e3 2168 log_debug("IMPORT builtin '%s' returned non-zero",
baa30fbc 2169 udev_builtin_name(cur->key.builtin_cmd));
912541b0
KS		 2170 event->builtin_ret |= (1 << cur->key.builtin_cmd);
2171 if (cur->key.op != OP_NOMATCH)
2172 goto nomatch;
2173 }
2174 break;
2175 }
2176 case TK_M_IMPORT_DB: {
915bf0f6 2177 const char *key = rules_str(rules, cur->key.value_off);
912541b0
KS		 2178 const char *value;
2179
2180 value = udev_device_get_property_value(event->dev_db, key);
2181 if (value != NULL) {
2182 struct udev_list_entry *entry;
2183
2184 entry = udev_device_add_property(event->dev, key, value);
2185 udev_list_entry_set_num(entry, true);
2186 } else {
2187 if (cur->key.op != OP_NOMATCH)
2188 goto nomatch;
2189 }
2190 break;
2191 }
2192 case TK_M_IMPORT_CMDLINE: {
2193 FILE *f;
2194 bool imported = false;
2195
47ef94ac 2196 f = fopen("/proc/cmdline", "re");
912541b0
KS		 2197 if (f != NULL) {
2198 char cmdline[4096];
2199
2200 if (fgets(cmdline, sizeof(cmdline), f) != NULL) {
915bf0f6 2201 const char *key = rules_str(rules, cur->key.value_off);
912541b0
KS		 2202 char *pos;
2203
2204 pos = strstr(cmdline, key);
2205 if (pos != NULL) {
2206 struct udev_list_entry *entry;
2207
2208 pos += strlen(key);
2209 if (pos[0] == '\0' || isspace(pos[0])) {
2210 /* we import simple flags as 'FLAG=1' */
2211 entry = udev_device_add_property(event->dev, key, "1");
2212 udev_list_entry_set_num(entry, true);
2213 imported = true;
2214 } else if (pos[0] == '=') {
2215 const char *value;
2216
2217 pos++;
2218 value = pos;
2219 while (pos[0] != '\0' && !isspace(pos[0]))
2220 pos++;
2221 pos[0] = '\0';
2222 entry = udev_device_add_property(event->dev, key, value);
2223 udev_list_entry_set_num(entry, true);
2224 imported = true;
2225 }
2226 }
2227 }
2228 fclose(f);
2229 }
2230 if (!imported && cur->key.op != OP_NOMATCH)
2231 goto nomatch;
2232 break;
2233 }
2234 case TK_M_IMPORT_PARENT: {
2235 char import[UTIL_PATH_SIZE];
2236
915bf0f6 2237 udev_event_apply_format(event, rules_str(rules, cur->key.value_off), import, sizeof(import));
912541b0
KS		 2238 if (import_parent_into_properties(event->dev, import) != 0)
2239 if (cur->key.op != OP_NOMATCH)
2240 goto nomatch;
2241 break;
2242 }
2243 case TK_M_RESULT:
2244 if (match_key(rules, cur, event->program_result) != 0)
2245 goto nomatch;
2246 break;
2247 case TK_A_STRING_ESCAPE_NONE:
2248 esc = ESCAPE_NONE;
2249 break;
2250 case TK_A_STRING_ESCAPE_REPLACE:
2251 esc = ESCAPE_REPLACE;
2252 break;
2253 case TK_A_DB_PERSIST:
2254 udev_device_set_db_persist(event->dev);
2255 break;
2256 case TK_A_INOTIFY_WATCH:
2257 if (event->inotify_watch_final)
2258 break;
2259 if (cur->key.op == OP_ASSIGN_FINAL)
2260 event->inotify_watch_final = true;
2261 event->inotify_watch = cur->key.watch;
2262 break;
2263 case TK_A_DEVLINK_PRIO:
2264 udev_device_set_devlink_priority(event->dev, cur->key.devlink_prio);
2265 break;
2266 case TK_A_OWNER: {
2267 char owner[UTIL_NAME_SIZE];
23bf8dd7
TG		 2268 const char *ow = owner;
2269 int r;
912541b0
KS		 2270
2271 if (event->owner_final)
2272 break;
2273 if (cur->key.op == OP_ASSIGN_FINAL)
2274 event->owner_final = true;
915bf0f6 2275 udev_event_apply_format(event, rules_str(rules, cur->key.value_off), owner, sizeof(owner));
1edefa4f 2276 event->owner_set = true;
23bf8dd7
TG		 2277 r = get_user_creds(&ow, &event->uid, NULL, NULL, NULL);
2278 if (r < 0) {
2279 if (r == -ENOENT || r == -ESRCH)
ff49bc32 2280 log_error("specified user '%s' unknown", owner);
23bf8dd7 2281 else
279d3c9c 2282 log_error_errno(r, "error resolving user '%s': %m", owner);
23bf8dd7
TG		 2283
2284 event->uid = 0;
2285 }
9f6445e3 2286 log_debug("OWNER %u %s:%u",
baa30fbc 2287 event->uid,
915bf0f6 2288 rules_str(rules, rule->rule.filename_off),
baa30fbc 2289 rule->rule.filename_line);
912541b0
KS		 2290 break;
2291 }
2292 case TK_A_GROUP: {
2293 char group[UTIL_NAME_SIZE];
23bf8dd7
TG		 2294 const char *gr = group;
2295 int r;
912541b0
KS		 2296
2297 if (event->group_final)
2298 break;
2299 if (cur->key.op == OP_ASSIGN_FINAL)
2300 event->group_final = true;
915bf0f6 2301 udev_event_apply_format(event, rules_str(rules, cur->key.value_off), group, sizeof(group));
1edefa4f 2302 event->group_set = true;
23bf8dd7
TG		 2303 r = get_group_creds(&gr, &event->gid);
2304 if (r < 0) {
2305 if (r == -ENOENT || r == -ESRCH)
ff49bc32 2306 log_error("specified group '%s' unknown", group);
23bf8dd7 2307 else
279d3c9c 2308 log_error_errno(r, "error resolving group '%s': %m", group);
23bf8dd7
TG		 2309
2310 event->gid = 0;
2311 }
9f6445e3 2312 log_debug("GROUP %u %s:%u",
baa30fbc 2313 event->gid,
915bf0f6 2314 rules_str(rules, rule->rule.filename_off),
baa30fbc 2315 rule->rule.filename_line);
912541b0
KS		 2316 break;
2317 }
2318 case TK_A_MODE: {
2319 char mode_str[UTIL_NAME_SIZE];
2320 mode_t mode;
2321 char *endptr;
2322
2323 if (event->mode_final)
2324 break;
915bf0f6 2325 udev_event_apply_format(event, rules_str(rules, cur->key.value_off), mode_str, sizeof(mode_str));
912541b0
KS		 2326 mode = strtol(mode_str, &endptr, 8);
2327 if (endptr[0] != '\0') {
9f6445e3 2328 log_error("ignoring invalid mode '%s'", mode_str);
912541b0
KS		 2329 break;
2330 }
2331 if (cur->key.op == OP_ASSIGN_FINAL)
2332 event->mode_final = true;
2333 event->mode_set = true;
2334 event->mode = mode;
9f6445e3 2335 log_debug("MODE %#o %s:%u",
baa30fbc 2336 event->mode,
915bf0f6 2337 rules_str(rules, rule->rule.filename_off),
baa30fbc 2338 rule->rule.filename_line);
912541b0
KS		 2339 break;
2340 }
2341 case TK_A_OWNER_ID:
2342 if (event->owner_final)
2343 break;
2344 if (cur->key.op == OP_ASSIGN_FINAL)
2345 event->owner_final = true;
1edefa4f 2346 event->owner_set = true;
912541b0 2347 event->uid = cur->key.uid;
9f6445e3 2348 log_debug("OWNER %u %s:%u",
baa30fbc 2349 event->uid,
915bf0f6 2350 rules_str(rules, rule->rule.filename_off),
baa30fbc 2351 rule->rule.filename_line);
912541b0
KS		 2352 break;
2353 case TK_A_GROUP_ID:
2354 if (event->group_final)
2355 break;
2356 if (cur->key.op == OP_ASSIGN_FINAL)
2357 event->group_final = true;
1edefa4f 2358 event->group_set = true;
912541b0 2359 event->gid = cur->key.gid;
9f6445e3 2360 log_debug("GROUP %u %s:%u",
baa30fbc 2361 event->gid,
915bf0f6 2362 rules_str(rules, rule->rule.filename_off),
baa30fbc 2363 rule->rule.filename_line);
912541b0
KS		 2364 break;
2365 case TK_A_MODE_ID:
2366 if (event->mode_final)
2367 break;
2368 if (cur->key.op == OP_ASSIGN_FINAL)
2369 event->mode_final = true;
2370 event->mode_set = true;
2371 event->mode = cur->key.mode;
9f6445e3 2372 log_debug("MODE %#o %s:%u",
baa30fbc 2373 event->mode,
915bf0f6 2374 rules_str(rules, rule->rule.filename_off),
baa30fbc 2375 rule->rule.filename_line);
912541b0 2376 break;
c26547d6
KS		 2377 case TK_A_SECLABEL: {
2378 const char *name, *label;
2379
2380 name = rules_str(rules, cur->key.attr_off);
2381 label = rules_str(rules, cur->key.value_off);
2382 if (cur->key.op == OP_ASSIGN || cur->key.op == OP_ASSIGN_FINAL)
2383 udev_list_cleanup(&event->seclabel_list);
2384 udev_list_entry_add(&event->seclabel_list, name, label);
9f6445e3 2385 log_debug("SECLABEL{%s}='%s' %s:%u",
c26547d6
KS		 2386 name, label,
2387 rules_str(rules, rule->rule.filename_off),
2388 rule->rule.filename_line);
2389 break;
2390 }
912541b0 2391 case TK_A_ENV: {
915bf0f6
KS		 2392 const char *name = rules_str(rules, cur->key.attr_off);
2393 char *value = rules_str(rules, cur->key.value_off);
07845c14
KS		 2394 char value_new[UTIL_NAME_SIZE];
2395 const char *value_old = NULL;
2396 struct udev_list_entry *entry;
912541b0 2397
07845c14
KS		 2398 if (value[0] == '\0') {
2399 if (cur->key.op == OP_ADD)
2400 break;
912541b0 2401 udev_device_add_property(event->dev, name, NULL);
07845c14 2402 break;
912541b0 2403 }
07845c14
KS		 2404
2405 if (cur->key.op == OP_ADD)
2406 value_old = udev_device_get_property_value(event->dev, name);
2407 if (value_old) {
2408 char temp[UTIL_NAME_SIZE];
2409
2410 /* append value separated by space */
2411 udev_event_apply_format(event, value, temp, sizeof(temp));
d5a89d7d 2412 strscpyl(value_new, sizeof(value_new), value_old, " ", temp, NULL);
07845c14
KS		 2413 } else
2414 udev_event_apply_format(event, value, value_new, sizeof(value_new));
2415
2416 entry = udev_device_add_property(event->dev, name, value_new);
2417 /* store in db, skip private keys */
2418 if (name[0] != '.')
2419 udev_list_entry_set_num(entry, true);
912541b0
KS		 2420 break;
2421 }
2422 case TK_A_TAG: {
2423 char tag[UTIL_PATH_SIZE];
2424 const char *p;
2425
915bf0f6 2426 udev_event_apply_format(event, rules_str(rules, cur->key.value_off), tag, sizeof(tag));
912541b0
KS		 2427 if (cur->key.op == OP_ASSIGN || cur->key.op == OP_ASSIGN_FINAL)
2428 udev_device_cleanup_tags_list(event->dev);
2429 for (p = tag; *p != '\0'; p++) {
2430 if ((*p >= 'a' && *p <= 'z') ||
2431 (*p >= 'A' && *p <= 'Z') ||
2432 (*p >= '0' && *p <= '9') ||
2433 *p == '-' || *p == '_')
2434 continue;
9f6445e3 2435 log_error("ignoring invalid tag name '%s'", tag);
912541b0
KS		 2436 break;
2437 }
8e3ba377
DH		 2438 if (cur->key.op == OP_REMOVE)
2439 udev_device_remove_tag(event->dev, tag);
2440 else
2441 udev_device_add_tag(event->dev, tag);
912541b0
KS		 2442 break;
2443 }
2444 case TK_A_NAME: {
915bf0f6 2445 const char *name = rules_str(rules, cur->key.value_off);
0ecfcbd4 2446
912541b0
KS		 2447 char name_str[UTIL_PATH_SIZE];
2448 int count;
2449
2450 if (event->name_final)
2451 break;
2452 if (cur->key.op == OP_ASSIGN_FINAL)
2453 event->name_final = true;
2454 udev_event_apply_format(event, name, name_str, sizeof(name_str));
2455 if (esc == ESCAPE_UNSET || esc == ESCAPE_REPLACE) {
2456 count = util_replace_chars(name_str, "/");
2457 if (count > 0)
9f6445e3 2458 log_debug("%i character(s) replaced", count);
912541b0 2459 }
6ada823a 2460 if (major(udev_device_get_devnum(event->dev)) &&
4cb72937 2461 (!streq(name_str, udev_device_get_devnode(event->dev) + strlen("/dev/")))) {
6ada823a
KS		 2462 log_error("NAME=\"%s\" ignored, kernel device nodes "
2463 "can not be renamed; please fix it in %s:%u\n", name,
915bf0f6 2464 rules_str(rules, rule->rule.filename_off), rule->rule.filename_line);
6ada823a 2465 break;
0ecfcbd4 2466 }
912541b0
KS		 2467 free(event->name);
2468 event->name = strdup(name_str);
9f6445e3 2469 log_debug("NAME '%s' %s:%u",
baa30fbc 2470 event->name,
915bf0f6 2471 rules_str(rules, rule->rule.filename_off),
baa30fbc 2472 rule->rule.filename_line);
912541b0
KS		 2473 break;
2474 }
2475 case TK_A_DEVLINK: {
2476 char temp[UTIL_PATH_SIZE];
2477 char filename[UTIL_PATH_SIZE];
2478 char *pos, *next;
2479 int count = 0;
2480
2481 if (event->devlink_final)
2482 break;
2483 if (major(udev_device_get_devnum(event->dev)) == 0)
2484 break;
2485 if (cur->key.op == OP_ASSIGN_FINAL)
2486 event->devlink_final = true;
2487 if (cur->key.op == OP_ASSIGN || cur->key.op == OP_ASSIGN_FINAL)
2488 udev_device_cleanup_devlinks_list(event->dev);
2489
2490 /* allow multiple symlinks separated by spaces */
915bf0f6 2491 udev_event_apply_format(event, rules_str(rules, cur->key.value_off), temp, sizeof(temp));
912541b0
KS		 2492 if (esc == ESCAPE_UNSET)
2493 count = util_replace_chars(temp, "/ ");
2494 else if (esc == ESCAPE_REPLACE)
2495 count = util_replace_chars(temp, "/");
2496 if (count > 0)
9f6445e3 2497 log_debug("%i character(s) replaced" , count);
912541b0
KS		 2498 pos = temp;
2499 while (isspace(pos[0]))
2500 pos++;
2501 next = strchr(pos, ' ');
2502 while (next != NULL) {
2503 next[0] = '\0';
9f6445e3 2504 log_debug("LINK '%s' %s:%u", pos,
915bf0f6 2505 rules_str(rules, rule->rule.filename_off), rule->rule.filename_line);
d5a89d7d 2506 strscpyl(filename, sizeof(filename), "/dev/", pos, NULL);
8a173387 2507 udev_device_add_devlink(event->dev, filename);
912541b0
KS		 2508 while (isspace(next[1]))
2509 next++;
2510 pos = &next[1];
2511 next = strchr(pos, ' ');
2512 }
2513 if (pos[0] != '\0') {
9f6445e3 2514 log_debug("LINK '%s' %s:%u", pos,
915bf0f6 2515 rules_str(rules, rule->rule.filename_off), rule->rule.filename_line);
d5a89d7d 2516 strscpyl(filename, sizeof(filename), "/dev/", pos, NULL);
8a173387 2517 udev_device_add_devlink(event->dev, filename);
912541b0
KS		 2518 }
2519 break;
2520 }
2521 case TK_A_ATTR: {
915bf0f6 2522 const char *key_name = rules_str(rules, cur->key.attr_off);
912541b0
KS		 2523 char attr[UTIL_PATH_SIZE];
2524 char value[UTIL_NAME_SIZE];
2525 FILE *f;
2526
2527 if (util_resolve_subsys_kernel(event->udev, key_name, attr, sizeof(attr), 0) != 0)
d5a89d7d 2528 strscpyl(attr, sizeof(attr), udev_device_get_syspath(event->dev), "/", key_name, NULL);
912541b0
KS		 2529 attr_subst_subdir(attr, sizeof(attr));
2530
915bf0f6 2531 udev_event_apply_format(event, rules_str(rules, cur->key.value_off), value, sizeof(value));
9f6445e3 2532 log_debug("ATTR '%s' writing '%s' %s:%u", attr, value,
915bf0f6 2533 rules_str(rules, rule->rule.filename_off),
baa30fbc 2534 rule->rule.filename_line);
47ef94ac 2535 f = fopen(attr, "we");
912541b0
KS		 2536 if (f != NULL) {
2537 if (fprintf(f, "%s", value) <= 0)
56f64d95 2538 log_error_errno(errno, "error writing ATTR{%s}: %m", attr);
912541b0
KS		 2539 fclose(f);
2540 } else {
56f64d95 2541 log_error_errno(errno, "error opening ATTR{%s} for writing: %m", attr);
912541b0
KS		 2542 }
2543 break;
2544 }
83cd6b75
KS		 2545 case TK_A_RUN_BUILTIN:
2546 case TK_A_RUN_PROGRAM: {
2547 struct udev_list_entry *entry;
2548
912541b0
KS		 2549 if (cur->key.op == OP_ASSIGN || cur->key.op == OP_ASSIGN_FINAL)
2550 udev_list_cleanup(&event->run_list);
9f6445e3 2551 log_debug("RUN '%s' %s:%u",
915bf0f6
KS		 2552 rules_str(rules, cur->key.value_off),
2553 rules_str(rules, rule->rule.filename_off),
baa30fbc 2554 rule->rule.filename_line);
915bf0f6 2555 entry = udev_list_entry_add(&event->run_list, rules_str(rules, cur->key.value_off), NULL);
83cd6b75 2556 udev_list_entry_set_num(entry, cur->key.builtin_cmd);
912541b0
KS		 2557 break;
2558 }
2559 case TK_A_GOTO:
2560 if (cur->key.rule_goto == 0)
2561 break;
2562 cur = &rules->tokens[cur->key.rule_goto];
2563 continue;
2564 case TK_END:
2565 return 0;
2566
2567 case TK_M_PARENTS_MIN:
2568 case TK_M_PARENTS_MAX:
2569 case TK_M_MAX:
2570 case TK_UNSET:
9f6445e3 2571 log_error("wrong type %u", cur->type);
912541b0
KS		 2572 goto nomatch;
2573 }
2574
2575 cur++;
2576 continue;
2577 nomatch:
2578 /* fast-forward to next rule */
2579 cur = rule + rule->rule.token_count;
912541b0 2580 }
6880b25d 2581}
761dfddc 2582
9ec6e95b 2583int udev_rules_apply_static_dev_perms(struct udev_rules *rules) {
912541b0
KS		 2584 struct token *cur;
2585 struct token *rule;
2586 uid_t uid = 0;
2587 gid_t gid = 0;
2588 mode_t mode = 0;
84b6ad70
TG		 2589 _cleanup_strv_free_ char **tags = NULL;
2590 char **t;
2591 FILE *f = NULL;
2592 _cleanup_free_ char *path = NULL;
2593 int r = 0;
912541b0
KS		 2594
2595 if (rules->tokens == NULL)
84b6ad70 2596 return 0;
912541b0
KS		 2597
2598 cur = &rules->tokens[0];
2599 rule = cur;
2600 for (;;) {
2601 switch (cur->type) {
2602 case TK_RULE:
2603 /* current rule */
2604 rule = cur;
2605
2606 /* skip rules without a static_node tag */
2607 if (!rule->rule.has_static_node)
2608 goto next;
2609
2610 uid = 0;
2611 gid = 0;
2612 mode = 0;
84b6ad70
TG		 2613 strv_free(tags);
2614 tags = NULL;
912541b0
KS		 2615 break;
2616 case TK_A_OWNER_ID:
2617 uid = cur->key.uid;
2618 break;
2619 case TK_A_GROUP_ID:
2620 gid = cur->key.gid;
2621 break;
2622 case TK_A_MODE_ID:
2623 mode = cur->key.mode;
84b6ad70
TG		 2624 break;
2625 case TK_A_TAG:
2626 r = strv_extend(&tags, rules_str(rules, cur->key.value_off));
2627 if (r < 0)
2628 goto finish;
2629
912541b0
KS		 2630 break;
2631 case TK_A_STATIC_NODE: {
84b6ad70
TG		 2632 char device_node[UTIL_PATH_SIZE];
2633 char tags_dir[UTIL_PATH_SIZE];
2634 char tag_symlink[UTIL_PATH_SIZE];
912541b0
KS		 2635 struct stat stats;
2636
2637 /* we assure, that the permissions tokens are sorted before the static token */
ca2bb160 2638
84b6ad70 2639 if (mode == 0 && uid == 0 && gid == 0 && tags == NULL)
912541b0 2640 goto next;
d6f116a7 2641
84b6ad70 2642 strscpyl(device_node, sizeof(device_node), "/dev/", rules_str(rules, cur->key.value_off), NULL);
ca2bb160
KS		 2643 if (stat(device_node, &stats) != 0)
2644 break;
2645 if (!S_ISBLK(stats.st_mode) && !S_ISCHR(stats.st_mode))
2646 break;
84b6ad70 2647
d6f116a7 2648 /* export the tags to a directory as symlinks, allowing otherwise dead nodes to be tagged */
84b6ad70 2649 if (tags) {
84b6ad70
TG		 2650 STRV_FOREACH(t, tags) {
2651 _cleanup_free_ char *unescaped_filename = NULL;
2652
2653 strscpyl(tags_dir, sizeof(tags_dir), "/run/udev/static_node-tags/", *t, "/", NULL);
2654 r = mkdir_p(tags_dir, 0755);
f647962d
MS		 2655 if (r < 0)
2656 return log_error_errno(r, "failed to create %s: %m", tags_dir);
84b6ad70
TG		 2657
2658 unescaped_filename = xescape(rules_str(rules, cur->key.value_off), "/.");
2659
2660 strscpyl(tag_symlink, sizeof(tag_symlink), tags_dir, unescaped_filename, NULL);
2661 r = symlink(device_node, tag_symlink);
2662 if (r < 0 && errno != EEXIST) {
56f64d95 2663 log_error_errno(errno, "failed to create symlink %s -> %s: %m", tag_symlink, device_node);
84b6ad70
TG		 2664 return -errno;
2665 } else
2666 r = 0;
2667 }
2668 }
2669
15a72200
TG		 2670 /* don't touch the permissions if only the tags were set */
2671 if (mode == 0 && uid == 0 && gid == 0)
d6f116a7
KS		 2672 break;
2673
912541b0
KS		 2674 if (mode == 0) {
2675 if (gid > 0)
2676 mode = 0660;
2677 else
2678 mode = 0600;
2679 }
2680 if (mode != (stats.st_mode & 01777)) {
490f0087
TG		 2681 r = chmod(device_node, mode);
2682 if (r < 0) {
9f6445e3 2683 log_error("failed to chmod '%s' %#o", device_node, mode);
490f0087
TG		 2684 return -errno;
2685 } else
9f6445e3 2686 log_debug("chmod '%s' %#o", device_node, mode);
912541b0
KS		 2687 }
2688
2689 if ((uid != 0 && uid != stats.st_uid) || (gid != 0 && gid != stats.st_gid)) {
490f0087
TG		 2690 r = chown(device_node, uid, gid);
2691 if (r < 0) {
9f6445e3 2692 log_error("failed to chown '%s' %u %u ", device_node, uid, gid);
490f0087
TG		 2693 return -errno;
2694 } else
9f6445e3 2695 log_debug("chown '%s' %u %u", device_node, uid, gid);
912541b0
KS		 2696 }
2697
84b6ad70 2698 utimensat(AT_FDCWD, device_node, NULL, 0);
912541b0
KS		 2699 break;
2700 }
2701 case TK_END:
84b6ad70 2702 goto finish;
912541b0
KS		 2703 }
2704
2705 cur++;
2706 continue;
761dfddc 2707next:
912541b0
KS		 2708 /* fast-forward to next rule */
2709 cur = rule + rule->rule.token_count;
2710 continue;
2711 }
84b6ad70
TG		 2712
2713finish:
2714 if (f) {
2715 fflush(f);
2716 fchmod(fileno(f), 0644);
2717 if (ferror(f) || rename(path, "/run/udev/static_node-tags") < 0) {
2718 r = -errno;
2719 unlink("/run/udev/static_node-tags");
2720 unlink(path);
2721 }
2722 fclose(f);
2723 }
2724
2725 return r;
761dfddc 2726}
Unnamed repository; edit this file 'description' to name the repository.