2 * Copyright (C) 2003-2012 Kay Sievers <kay@vrfy.org>
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.
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.
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/>.
33 #include "path-util.h"
34 #include "conf-files.h"
39 #define PREALLOC_TOKEN 2048
42 unsigned int name_off
;
55 /* every key in the rules file becomes a token */
57 unsigned int token_cur
;
58 unsigned int token_max
;
60 /* all key strings are copied and de-duplicated in a single continuous string buffer */
61 struct strbuf
*strbuf
;
63 /* during rule parsing, uid/gid lookup results are cached */
65 unsigned int uids_cur
;
66 unsigned int uids_max
;
68 unsigned int gids_cur
;
69 unsigned int gids_max
;
72 static char *rules_str(struct udev_rules
*rules
, unsigned int off
) {
73 return rules
->strbuf
->buf
+ off
;
76 static unsigned int rules_add_string(struct udev_rules
*rules
, const char *s
) {
77 return strbuf_add_string(rules
->strbuf
, s
, strlen(s
));
80 /* KEY=="", KEY!="", KEY+="", KEY="", KEY:="" */
93 enum string_glob_type
{
95 GL_PLAIN
, /* no special chars */
96 GL_GLOB
, /* shell globs ?,*,[] */
97 GL_SPLIT
, /* multi-value A|B */
98 GL_SPLIT_GLOB
, /* multi-value with glob A*|B* */
99 GL_SOMETHING
, /* commonly used "?*" */
102 enum string_subst_type
{
109 /* tokens of a rule are sorted/handled in this order */
114 TK_M_ACTION
, /* val */
115 TK_M_DEVPATH
, /* val */
116 TK_M_KERNEL
, /* val */
117 TK_M_DEVLINK
, /* val */
119 TK_M_ENV
, /* val, attr */
121 TK_M_SUBSYSTEM
, /* val */
122 TK_M_DRIVER
, /* val */
123 TK_M_WAITFOR
, /* val */
124 TK_M_ATTR
, /* val, attr */
127 TK_M_KERNELS
, /* val */
128 TK_M_SUBSYSTEMS
, /* val */
129 TK_M_DRIVERS
, /* val */
130 TK_M_ATTRS
, /* val, attr */
134 TK_M_TEST
, /* val, mode_t */
135 TK_M_EVENT_TIMEOUT
, /* int */
136 TK_M_PROGRAM
, /* val */
137 TK_M_IMPORT_FILE
, /* val */
138 TK_M_IMPORT_PROG
, /* val */
139 TK_M_IMPORT_BUILTIN
, /* val */
140 TK_M_IMPORT_DB
, /* val */
141 TK_M_IMPORT_CMDLINE
, /* val */
142 TK_M_IMPORT_PARENT
, /* val */
143 TK_M_RESULT
, /* val */
146 TK_A_STRING_ESCAPE_NONE
,
147 TK_A_STRING_ESCAPE_REPLACE
,
149 TK_A_INOTIFY_WATCH
, /* int */
150 TK_A_DEVLINK_PRIO
, /* int */
151 TK_A_OWNER
, /* val */
152 TK_A_GROUP
, /* val */
154 TK_A_OWNER_ID
, /* uid_t */
155 TK_A_GROUP_ID
, /* gid_t */
156 TK_A_MODE_ID
, /* mode_t */
158 TK_A_STATIC_NODE
, /* val */
159 TK_A_SECLABEL
, /* val, attr */
160 TK_A_ENV
, /* val, attr */
162 TK_A_DEVLINK
, /* val */
163 TK_A_ATTR
, /* val, attr */
164 TK_A_RUN_BUILTIN
, /* val, bool */
165 TK_A_RUN_PROGRAM
, /* val, bool */
166 TK_A_GOTO
, /* size_t */
171 /* we try to pack stuff in a way that we take only 12 bytes per token */
174 unsigned char type
; /* same in rule and key */
176 enum token_type type
:8;
178 bool has_static_node
:1;
179 unsigned int unused
:6;
180 unsigned short token_count
;
181 unsigned int label_off
;
182 unsigned short filename_off
;
183 unsigned short filename_line
;
186 enum token_type type
:8;
187 enum operation_type op
:8;
188 enum string_glob_type glob
:8;
189 enum string_subst_type subst
:4;
190 enum string_subst_type attrsubst
:4;
191 unsigned int value_off
;
193 unsigned int attr_off
;
194 unsigned int rule_goto
;
201 enum udev_builtin_cmd builtin_cmd
;
209 struct udev_rules
*rules
;
211 struct token token
[MAX_TK
];
212 unsigned int token_cur
;
216 static const char *operation_str(enum operation_type type
)
218 static const char *operation_strs
[] = {
219 [OP_UNSET
] = "UNSET",
220 [OP_MATCH
] = "match",
221 [OP_NOMATCH
] = "nomatch",
222 [OP_MATCH_MAX
] = "MATCH_MAX",
225 [OP_ASSIGN
] = "assign",
226 [OP_ASSIGN_FINAL
] = "assign-final",
229 return operation_strs
[type
];
232 static const char *string_glob_str(enum string_glob_type type
)
234 static const char *string_glob_strs
[] = {
235 [GL_UNSET
] = "UNSET",
236 [GL_PLAIN
] = "plain",
238 [GL_SPLIT
] = "split",
239 [GL_SPLIT_GLOB
] = "split-glob",
240 [GL_SOMETHING
] = "split-glob",
243 return string_glob_strs
[type
];
246 static const char *token_str(enum token_type type
)
248 static const char *token_strs
[] = {
249 [TK_UNSET
] = "UNSET",
252 [TK_M_ACTION
] = "M ACTION",
253 [TK_M_DEVPATH
] = "M DEVPATH",
254 [TK_M_KERNEL
] = "M KERNEL",
255 [TK_M_DEVLINK
] = "M DEVLINK",
256 [TK_M_NAME
] = "M NAME",
257 [TK_M_ENV
] = "M ENV",
258 [TK_M_TAG
] = "M TAG",
259 [TK_M_SUBSYSTEM
] = "M SUBSYSTEM",
260 [TK_M_DRIVER
] = "M DRIVER",
261 [TK_M_WAITFOR
] = "M WAITFOR",
262 [TK_M_ATTR
] = "M ATTR",
264 [TK_M_PARENTS_MIN
] = "M PARENTS_MIN",
265 [TK_M_KERNELS
] = "M KERNELS",
266 [TK_M_SUBSYSTEMS
] = "M SUBSYSTEMS",
267 [TK_M_DRIVERS
] = "M DRIVERS",
268 [TK_M_ATTRS
] = "M ATTRS",
269 [TK_M_TAGS
] = "M TAGS",
270 [TK_M_PARENTS_MAX
] = "M PARENTS_MAX",
272 [TK_M_TEST
] = "M TEST",
273 [TK_M_EVENT_TIMEOUT
] = "M EVENT_TIMEOUT",
274 [TK_M_PROGRAM
] = "M PROGRAM",
275 [TK_M_IMPORT_FILE
] = "M IMPORT_FILE",
276 [TK_M_IMPORT_PROG
] = "M IMPORT_PROG",
277 [TK_M_IMPORT_BUILTIN
] = "M IMPORT_BUILTIN",
278 [TK_M_IMPORT_DB
] = "M IMPORT_DB",
279 [TK_M_IMPORT_CMDLINE
] = "M IMPORT_CMDLINE",
280 [TK_M_IMPORT_PARENT
] = "M IMPORT_PARENT",
281 [TK_M_RESULT
] = "M RESULT",
282 [TK_M_MAX
] = "M MAX",
284 [TK_A_STRING_ESCAPE_NONE
] = "A STRING_ESCAPE_NONE",
285 [TK_A_STRING_ESCAPE_REPLACE
] = "A STRING_ESCAPE_REPLACE",
286 [TK_A_DB_PERSIST
] = "A DB_PERSIST",
287 [TK_A_INOTIFY_WATCH
] = "A INOTIFY_WATCH",
288 [TK_A_DEVLINK_PRIO
] = "A DEVLINK_PRIO",
289 [TK_A_OWNER
] = "A OWNER",
290 [TK_A_GROUP
] = "A GROUP",
291 [TK_A_MODE
] = "A MODE",
292 [TK_A_OWNER_ID
] = "A OWNER_ID",
293 [TK_A_GROUP_ID
] = "A GROUP_ID",
294 [TK_A_STATIC_NODE
] = "A STATIC_NODE",
295 [TK_A_SECLABEL
] = "A SECLABEL",
296 [TK_A_MODE_ID
] = "A MODE_ID",
297 [TK_A_ENV
] = "A ENV",
298 [TK_A_TAG
] = "A ENV",
299 [TK_A_NAME
] = "A NAME",
300 [TK_A_DEVLINK
] = "A DEVLINK",
301 [TK_A_ATTR
] = "A ATTR",
302 [TK_A_RUN_BUILTIN
] = "A RUN_BUILTIN",
303 [TK_A_RUN_PROGRAM
] = "A RUN_PROGRAM",
304 [TK_A_GOTO
] = "A GOTO",
309 return token_strs
[type
];
312 static void dump_token(struct udev_rules
*rules
, struct token
*token
)
314 enum token_type type
= token
->type
;
315 enum operation_type op
= token
->key
.op
;
316 enum string_glob_type glob
= token
->key
.glob
;
317 const char *value
= str(rules
, token
->key
.value_off
);
318 const char *attr
= &rules
->buf
[token
->key
.attr_off
];
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
);
327 log_debug("* RULE %s:%u, token: %u, count: %u, label: '%s'\n",
328 &rules
->buf
[token
->rule
.filename_off
], token
->rule
.filename_line
,
329 idx
, token
->rule
.token_count
,
330 &rules
->buf
[token
->rule
.label_off
]);
342 case TK_M_SUBSYSTEMS
:
346 case TK_M_IMPORT_FILE
:
347 case TK_M_IMPORT_PROG
:
349 case TK_M_IMPORT_CMDLINE
:
350 case TK_M_IMPORT_PARENT
:
357 case TK_A_RUN_BUILTIN
:
358 case TK_A_RUN_PROGRAM
:
359 log_debug("%s %s '%s'(%s)\n",
360 token_str(type
), operation_str(op
), value
, string_glob_str(glob
));
362 case TK_M_IMPORT_BUILTIN
:
363 log_debug("%s %i '%s'\n", token_str(type
), token
->key
.builtin_cmd
, value
);
370 log_debug("%s %s '%s' '%s'(%s)\n",
371 token_str(type
), operation_str(op
), attr
, value
, string_glob_str(glob
));
375 log_debug("%s %s '%s'\n", token_str(type
), operation_str(op
), value
);
377 case TK_A_STRING_ESCAPE_NONE
:
378 case TK_A_STRING_ESCAPE_REPLACE
:
379 case TK_A_DB_PERSIST
:
380 log_debug("%s\n", token_str(type
));
383 log_debug("%s %s '%s'(%s) %#o\n",
384 token_str(type
), operation_str(op
), value
, string_glob_str(glob
), token
->key
.mode
);
386 case TK_A_INOTIFY_WATCH
:
387 log_debug("%s %u\n", token_str(type
), token
->key
.watch
);
389 case TK_A_DEVLINK_PRIO
:
390 log_debug("%s %u\n", token_str(type
), token
->key
.devlink_prio
);
393 log_debug("%s %s %u\n", token_str(type
), operation_str(op
), token
->key
.uid
);
396 log_debug("%s %s %u\n", token_str(type
), operation_str(op
), token
->key
.gid
);
399 log_debug("%s %s %#o\n", token_str(type
), operation_str(op
), token
->key
.mode
);
401 case TK_A_STATIC_NODE
:
402 log_debug("%s '%s'\n", token_str(type
), value
);
405 log_debug("%s %s '%s' '%s'\n", token_str(type
), operation_str(op
), attr
, value
);
407 case TK_M_EVENT_TIMEOUT
:
408 log_debug("%s %u\n", token_str(type
), token
->key
.event_timeout
);
411 log_debug("%s '%s' %u\n", token_str(type
), value
, token
->key
.rule_goto
);
414 log_debug("* %s\n", token_str(type
));
416 case TK_M_PARENTS_MIN
:
417 case TK_M_PARENTS_MAX
:
420 log_debug("unknown type %u\n", type
);
425 static void dump_rules(struct udev_rules
*rules
)
429 log_debug("dumping %u (%zu bytes) tokens, %u (%zu bytes) strings\n",
431 rules
->token_cur
* sizeof(struct token
),
434 for(i
= 0; i
< rules
->token_cur
; i
++)
435 dump_token(rules
, &rules
->tokens
[i
]);
438 static inline const char *operation_str(enum operation_type type
) { return NULL
; }
439 static inline const char *token_str(enum token_type type
) { return NULL
; }
440 static inline void dump_token(struct udev_rules
*rules
, struct token
*token
) {}
441 static inline void dump_rules(struct udev_rules
*rules
) {}
444 static int add_token(struct udev_rules
*rules
, struct token
*token
)
446 /* grow buffer if needed */
447 if (rules
->token_cur
+1 >= rules
->token_max
) {
448 struct token
*tokens
;
451 /* double the buffer size */
452 add
= rules
->token_max
;
456 tokens
= realloc(rules
->tokens
, (rules
->token_max
+ add
) * sizeof(struct token
));
459 rules
->tokens
= tokens
;
460 rules
->token_max
+= add
;
462 memcpy(&rules
->tokens
[rules
->token_cur
], token
, sizeof(struct token
));
467 static uid_t
add_uid(struct udev_rules
*rules
, const char *owner
)
473 /* lookup, if we know it already */
474 for (i
= 0; i
< rules
->uids_cur
; i
++) {
475 off
= rules
->uids
[i
].name_off
;
476 if (streq(rules_str(rules
, off
), owner
)) {
477 uid
= rules
->uids
[i
].uid
;
481 uid
= util_lookup_user(rules
->udev
, owner
);
483 /* grow buffer if needed */
484 if (rules
->uids_cur
+1 >= rules
->uids_max
) {
485 struct uid_gid
*uids
;
488 /* double the buffer size */
489 add
= rules
->uids_max
;
493 uids
= realloc(rules
->uids
, (rules
->uids_max
+ add
) * sizeof(struct uid_gid
));
497 rules
->uids_max
+= add
;
499 rules
->uids
[rules
->uids_cur
].uid
= uid
;
500 off
= rules_add_string(rules
, owner
);
503 rules
->uids
[rules
->uids_cur
].name_off
= off
;
508 static gid_t
add_gid(struct udev_rules
*rules
, const char *group
)
514 /* lookup, if we know it already */
515 for (i
= 0; i
< rules
->gids_cur
; i
++) {
516 off
= rules
->gids
[i
].name_off
;
517 if (streq(rules_str(rules
, off
), group
)) {
518 gid
= rules
->gids
[i
].gid
;
522 gid
= util_lookup_group(rules
->udev
, group
);
524 /* grow buffer if needed */
525 if (rules
->gids_cur
+1 >= rules
->gids_max
) {
526 struct uid_gid
*gids
;
529 /* double the buffer size */
530 add
= rules
->gids_max
;
534 gids
= realloc(rules
->gids
, (rules
->gids_max
+ add
) * sizeof(struct uid_gid
));
538 rules
->gids_max
+= add
;
540 rules
->gids
[rules
->gids_cur
].gid
= gid
;
541 off
= rules_add_string(rules
, group
);
544 rules
->gids
[rules
->gids_cur
].name_off
= off
;
549 static int import_property_from_string(struct udev_device
*dev
, char *line
)
554 struct udev_list_entry
*entry
;
558 while (isspace(key
[0]))
561 /* comment or empty line */
562 if (key
[0] == '#' || key
[0] == '\0')
565 /* split key/value */
566 val
= strchr(key
, '=');
573 while (isspace(val
[0]))
580 while (isspace(key
[len
-1]))
584 /* terminate value */
588 while (isspace(val
[len
-1]))
596 if (val
[0] == '"' || val
[0] == '\'') {
597 if (val
[len
-1] != val
[0]) {
598 log_debug("inconsistent quoting: '%s', skip\n", line
);
605 entry
= udev_device_add_property(dev
, key
, val
);
606 /* store in db, skip private keys */
608 udev_list_entry_set_num(entry
, true);
613 static int import_file_into_properties(struct udev_device
*dev
, const char *filename
)
616 char line
[UTIL_LINE_SIZE
];
618 f
= fopen(filename
, "re");
621 while (fgets(line
, sizeof(line
), f
) != NULL
)
622 import_property_from_string(dev
, line
);
627 static int import_program_into_properties(struct udev_event
*event
, const char *program
, const sigset_t
*sigmask
)
629 struct udev_device
*dev
= event
->dev
;
631 char result
[UTIL_LINE_SIZE
];
635 envp
= udev_device_get_properties_envp(dev
);
636 err
= udev_event_spawn(event
, program
, envp
, sigmask
, result
, sizeof(result
));
641 while (line
!= NULL
) {
644 pos
= strchr(line
, '\n');
649 import_property_from_string(dev
, line
);
655 static int import_parent_into_properties(struct udev_device
*dev
, const char *filter
)
657 struct udev_device
*dev_parent
;
658 struct udev_list_entry
*list_entry
;
660 dev_parent
= udev_device_get_parent(dev
);
661 if (dev_parent
== NULL
)
664 udev_list_entry_foreach(list_entry
, udev_device_get_properties_list_entry(dev_parent
)) {
665 const char *key
= udev_list_entry_get_name(list_entry
);
666 const char *val
= udev_list_entry_get_value(list_entry
);
668 if (fnmatch(filter
, key
, 0) == 0) {
669 struct udev_list_entry
*entry
;
671 entry
= udev_device_add_property(dev
, key
, val
);
672 /* store in db, skip private keys */
674 udev_list_entry_set_num(entry
, true);
680 #define WAIT_LOOP_PER_SECOND 50
681 static int wait_for_file(struct udev_device
*dev
, const char *file
, int timeout
)
683 char filepath
[UTIL_PATH_SIZE
];
684 char devicepath
[UTIL_PATH_SIZE
];
686 int loop
= timeout
* WAIT_LOOP_PER_SECOND
;
688 /* a relative path is a device attribute */
689 devicepath
[0] = '\0';
690 if (file
[0] != '/') {
691 strscpyl(devicepath
, sizeof(devicepath
), udev_device_get_syspath(dev
), NULL
);
692 strscpyl(filepath
, sizeof(filepath
), devicepath
, "/", file
, NULL
);
697 const struct timespec duration
= { 0, 1000 * 1000 * 1000 / WAIT_LOOP_PER_SECOND
};
700 if (stat(file
, &stats
) == 0) {
701 log_debug("file '%s' appeared after %i loops\n", file
, (timeout
* WAIT_LOOP_PER_SECOND
) - loop
-1);
704 /* make sure, the device did not disappear in the meantime */
705 if (devicepath
[0] != '\0' && stat(devicepath
, &stats
) != 0) {
706 log_debug("device disappeared while waiting for '%s'\n", file
);
709 log_debug("wait for '%s' for %i mseconds\n", file
, 1000 / WAIT_LOOP_PER_SECOND
);
710 nanosleep(&duration
, NULL
);
712 log_debug("waiting for '%s' failed\n", file
);
716 static int attr_subst_subdir(char *attr
, size_t len
)
720 if (strstr(attr
, "/*/")) {
722 char dirname
[UTIL_PATH_SIZE
];
726 strscpy(dirname
, sizeof(dirname
), attr
);
727 pos
= strstr(dirname
, "/*/");
732 dir
= opendir(dirname
);
736 for (dent
= readdir(dir
); dent
!= NULL
; dent
= readdir(dir
)) {
739 if (dent
->d_name
[0] == '.')
741 strscpyl(attr
, len
, dirname
, "/", dent
->d_name
, tail
, NULL
);
742 if (stat(attr
, &stats
) == 0) {
754 static int get_key(struct udev
*udev
, char **line
, char **key
, enum operation_type
*op
, char **value
)
760 if (linepos
== NULL
|| linepos
[0] == '\0')
763 /* skip whitespace */
764 while (isspace(linepos
[0]) || linepos
[0] == ',')
768 if (linepos
[0] == '\0')
774 if (linepos
[0] == '\0')
776 if (isspace(linepos
[0]))
778 if (linepos
[0] == '=')
780 if ((linepos
[0] == '+') || (linepos
[0] == '!') || (linepos
[0] == ':'))
781 if (linepos
[1] == '=')
785 /* remember end of key */
788 /* skip whitespace after key */
789 while (isspace(linepos
[0]))
791 if (linepos
[0] == '\0')
794 /* get operation type */
795 if (linepos
[0] == '=' && linepos
[1] == '=') {
798 } else if (linepos
[0] == '!' && linepos
[1] == '=') {
801 } else if (linepos
[0] == '+' && linepos
[1] == '=') {
804 } else if (linepos
[0] == '=') {
807 } else if (linepos
[0] == ':' && linepos
[1] == '=') {
808 *op
= OP_ASSIGN_FINAL
;
816 /* skip whitespace after operator */
817 while (isspace(linepos
[0]))
819 if (linepos
[0] == '\0')
823 if (linepos
[0] == '"')
830 temp
= strchr(linepos
, '"');
836 /* move line to next key */
841 /* extract possible KEY{attr} */
842 static const char *get_key_attribute(struct udev
*udev
, char *str
)
847 attr
= strchr(str
, '{');
850 pos
= strchr(attr
, '}');
852 log_error("missing closing brace for format\n");
861 static int rule_add_key(struct rule_tmp
*rule_tmp
, enum token_type type
,
862 enum operation_type op
,
863 const char *value
, const void *data
)
865 struct token
*token
= &rule_tmp
->token
[rule_tmp
->token_cur
];
866 const char *attr
= NULL
;
868 memset(token
, 0x00, sizeof(struct token
));
880 case TK_M_SUBSYSTEMS
:
884 case TK_M_IMPORT_FILE
:
885 case TK_M_IMPORT_PROG
:
887 case TK_M_IMPORT_CMDLINE
:
888 case TK_M_IMPORT_PARENT
:
898 token
->key
.value_off
= rules_add_string(rule_tmp
->rules
, value
);
900 case TK_M_IMPORT_BUILTIN
:
901 token
->key
.value_off
= rules_add_string(rule_tmp
->rules
, value
);
902 token
->key
.builtin_cmd
= *(enum udev_builtin_cmd
*)data
;
911 token
->key
.value_off
= rules_add_string(rule_tmp
->rules
, value
);
912 token
->key
.attr_off
= rules_add_string(rule_tmp
->rules
, attr
);
915 token
->key
.value_off
= rules_add_string(rule_tmp
->rules
, value
);
917 token
->key
.mode
= *(mode_t
*)data
;
919 case TK_A_STRING_ESCAPE_NONE
:
920 case TK_A_STRING_ESCAPE_REPLACE
:
921 case TK_A_DB_PERSIST
:
923 case TK_A_RUN_BUILTIN
:
924 case TK_A_RUN_PROGRAM
:
925 token
->key
.builtin_cmd
= *(enum udev_builtin_cmd
*)data
;
926 token
->key
.value_off
= rules_add_string(rule_tmp
->rules
, value
);
928 case TK_A_INOTIFY_WATCH
:
929 case TK_A_DEVLINK_PRIO
:
930 token
->key
.devlink_prio
= *(int *)data
;
933 token
->key
.uid
= *(uid_t
*)data
;
936 token
->key
.gid
= *(gid_t
*)data
;
939 token
->key
.mode
= *(mode_t
*)data
;
941 case TK_A_STATIC_NODE
:
942 token
->key
.value_off
= rules_add_string(rule_tmp
->rules
, value
);
944 case TK_M_EVENT_TIMEOUT
:
945 token
->key
.event_timeout
= *(int *)data
;
948 case TK_M_PARENTS_MIN
:
949 case TK_M_PARENTS_MAX
:
953 log_error("wrong type %u\n", type
);
957 if (value
!= NULL
&& type
< TK_M_MAX
) {
958 /* check if we need to split or call fnmatch() while matching rules */
959 enum string_glob_type glob
;
963 has_split
= (strchr(value
, '|') != NULL
);
964 has_glob
= (strchr(value
, '*') != NULL
|| strchr(value
, '?') != NULL
|| strchr(value
, '[') != NULL
);
965 if (has_split
&& has_glob
) {
966 glob
= GL_SPLIT_GLOB
;
967 } else if (has_split
) {
969 } else if (has_glob
) {
970 if (streq(value
, "?*"))
977 token
->key
.glob
= glob
;
980 if (value
!= NULL
&& type
> TK_M_MAX
) {
981 /* check if assigned value has substitution chars */
983 token
->key
.subst
= SB_SUBSYS
;
984 else if (strchr(value
, '%') != NULL
|| strchr(value
, '$') != NULL
)
985 token
->key
.subst
= SB_FORMAT
;
987 token
->key
.subst
= SB_NONE
;
991 /* check if property/attribut name has substitution chars */
993 token
->key
.attrsubst
= SB_SUBSYS
;
994 else if (strchr(attr
, '%') != NULL
|| strchr(attr
, '$') != NULL
)
995 token
->key
.attrsubst
= SB_FORMAT
;
997 token
->key
.attrsubst
= SB_NONE
;
1000 token
->key
.type
= type
;
1002 rule_tmp
->token_cur
++;
1003 if (rule_tmp
->token_cur
>= ELEMENTSOF(rule_tmp
->token
)) {
1004 log_error("temporary rule array too small\n");
1010 static int sort_token(struct udev_rules
*rules
, struct rule_tmp
*rule_tmp
)
1013 unsigned int start
= 0;
1014 unsigned int end
= rule_tmp
->token_cur
;
1016 for (i
= 0; i
< rule_tmp
->token_cur
; i
++) {
1017 enum token_type next_val
= TK_UNSET
;
1018 unsigned int next_idx
= 0;
1021 /* find smallest value */
1022 for (j
= start
; j
< end
; j
++) {
1023 if (rule_tmp
->token
[j
].type
== TK_UNSET
)
1025 if (next_val
== TK_UNSET
|| rule_tmp
->token
[j
].type
< next_val
) {
1026 next_val
= rule_tmp
->token
[j
].type
;
1031 /* add token and mark done */
1032 if (add_token(rules
, &rule_tmp
->token
[next_idx
]) != 0)
1034 rule_tmp
->token
[next_idx
].type
= TK_UNSET
;
1037 if (next_idx
== start
)
1039 if (next_idx
+1 == end
)
1045 static int add_rule(struct udev_rules
*rules
, char *line
,
1046 const char *filename
, unsigned int filename_off
, unsigned int lineno
)
1050 struct rule_tmp rule_tmp
;
1052 memset(&rule_tmp
, 0x00, sizeof(struct rule_tmp
));
1053 rule_tmp
.rules
= rules
;
1054 rule_tmp
.rule
.type
= TK_RULE
;
1055 /* the offset in the rule is limited to unsigned short */
1056 if (filename_off
< USHRT_MAX
)
1057 rule_tmp
.rule
.rule
.filename_off
= filename_off
;
1058 rule_tmp
.rule
.rule
.filename_line
= lineno
;
1064 enum operation_type op
;
1066 if (get_key(rules
->udev
, &linepos
, &key
, &op
, &value
) != 0) {
1067 /* Avoid erroring on trailing whitespace. This is probably rare
1068 * so save the work for the error case instead of always trying
1069 * to strip the trailing whitespace with strstrip(). */
1070 while (isblank(*linepos
))
1073 /* If we aren't at the end of the line, this is a parsing error.
1074 * Make a best effort to describe where the problem is. */
1075 if (*linepos
!= '\n') {
1076 char buf
[2] = {linepos
[1]};
1077 _cleanup_free_
char *tmp
;
1080 log_error("invalid key/value pair in file %s on line %u,"
1081 "starting at character %tu ('%s')\n",
1082 filename
, lineno
, linepos
- line
+ 1, tmp
);
1083 if (linepos
[1] == '#')
1084 log_error("hint: comments can only start at beginning of line");
1089 if (streq(key
, "ACTION")) {
1090 if (op
> OP_MATCH_MAX
) {
1091 log_error("invalid ACTION operation\n");
1094 rule_add_key(&rule_tmp
, TK_M_ACTION
, op
, value
, NULL
);
1098 if (streq(key
, "DEVPATH")) {
1099 if (op
> OP_MATCH_MAX
) {
1100 log_error("invalid DEVPATH operation\n");
1103 rule_add_key(&rule_tmp
, TK_M_DEVPATH
, op
, value
, NULL
);
1107 if (streq(key
, "KERNEL")) {
1108 if (op
> OP_MATCH_MAX
) {
1109 log_error("invalid KERNEL operation\n");
1112 rule_add_key(&rule_tmp
, TK_M_KERNEL
, op
, value
, NULL
);
1116 if (streq(key
, "SUBSYSTEM")) {
1117 if (op
> OP_MATCH_MAX
) {
1118 log_error("invalid SUBSYSTEM operation\n");
1121 /* bus, class, subsystem events should all be the same */
1122 if (streq(value
, "subsystem") ||
1123 streq(value
, "bus") ||
1124 streq(value
, "class")) {
1125 if (streq(value
, "bus") || streq(value
, "class"))
1126 log_error("'%s' must be specified as 'subsystem' \n"
1127 "please fix it in %s:%u", value
, filename
, lineno
);
1128 rule_add_key(&rule_tmp
, TK_M_SUBSYSTEM
, op
, "subsystem|class|bus", NULL
);
1130 rule_add_key(&rule_tmp
, TK_M_SUBSYSTEM
, op
, value
, NULL
);
1134 if (streq(key
, "DRIVER")) {
1135 if (op
> OP_MATCH_MAX
) {
1136 log_error("invalid DRIVER operation\n");
1139 rule_add_key(&rule_tmp
, TK_M_DRIVER
, op
, value
, NULL
);
1143 if (startswith(key
, "ATTR{")) {
1144 attr
= get_key_attribute(rules
->udev
, key
+ sizeof("ATTR")-1);
1146 log_error("error parsing ATTR attribute\n");
1149 if (op
< OP_MATCH_MAX
) {
1150 rule_add_key(&rule_tmp
, TK_M_ATTR
, op
, value
, attr
);
1152 rule_add_key(&rule_tmp
, TK_A_ATTR
, op
, value
, attr
);
1157 if (startswith(key
, "SECLABEL{")) {
1158 attr
= get_key_attribute(rules
->udev
, key
+ sizeof("SECLABEL")-1);
1160 log_error("error parsing SECLABEL attribute\n");
1164 rule_add_key(&rule_tmp
, TK_A_SECLABEL
, op
, value
, attr
);
1168 if (streq(key
, "KERNELS")) {
1169 if (op
> OP_MATCH_MAX
) {
1170 log_error("invalid KERNELS operation\n");
1173 rule_add_key(&rule_tmp
, TK_M_KERNELS
, op
, value
, NULL
);
1177 if (streq(key
, "SUBSYSTEMS")) {
1178 if (op
> OP_MATCH_MAX
) {
1179 log_error("invalid SUBSYSTEMS operation\n");
1182 rule_add_key(&rule_tmp
, TK_M_SUBSYSTEMS
, op
, value
, NULL
);
1186 if (streq(key
, "DRIVERS")) {
1187 if (op
> OP_MATCH_MAX
) {
1188 log_error("invalid DRIVERS operation\n");
1191 rule_add_key(&rule_tmp
, TK_M_DRIVERS
, op
, value
, NULL
);
1195 if (startswith(key
, "ATTRS{")) {
1196 if (op
> OP_MATCH_MAX
) {
1197 log_error("invalid ATTRS operation\n");
1200 attr
= get_key_attribute(rules
->udev
, key
+ sizeof("ATTRS")-1);
1202 log_error("error parsing ATTRS attribute\n");
1205 if (startswith(attr
, "device/"))
1206 log_error("the 'device' link may not be available in a future kernel, "
1207 "please fix it in %s:%u", filename
, lineno
);
1208 else if (strstr(attr
, "../") != NULL
)
1209 log_error("do not reference parent sysfs directories directly, "
1210 "it may break with a future kernel, please fix it in %s:%u", filename
, lineno
);
1211 rule_add_key(&rule_tmp
, TK_M_ATTRS
, op
, value
, attr
);
1215 if (streq(key
, "TAGS")) {
1216 if (op
> OP_MATCH_MAX
) {
1217 log_error("invalid TAGS operation\n");
1220 rule_add_key(&rule_tmp
, TK_M_TAGS
, op
, value
, NULL
);
1224 if (startswith(key
, "ENV{")) {
1225 attr
= get_key_attribute(rules
->udev
, key
+ sizeof("ENV")-1);
1227 log_error("error parsing ENV attribute\n");
1230 if (op
< OP_MATCH_MAX
) {
1231 if (rule_add_key(&rule_tmp
, TK_M_ENV
, op
, value
, attr
) != 0)
1234 static const char *blacklist
[] = {
1249 for (i
= 0; i
< ELEMENTSOF(blacklist
); i
++) {
1250 if (!streq(attr
, blacklist
[i
]))
1252 log_error("invalid ENV attribute, '%s' can not be set %s:%u\n", attr
, filename
, lineno
);
1255 if (rule_add_key(&rule_tmp
, TK_A_ENV
, op
, value
, attr
) != 0)
1261 if (streq(key
, "TAG")) {
1262 if (op
< OP_MATCH_MAX
)
1263 rule_add_key(&rule_tmp
, TK_M_TAG
, op
, value
, NULL
);
1265 rule_add_key(&rule_tmp
, TK_A_TAG
, op
, value
, NULL
);
1269 if (streq(key
, "PROGRAM")) {
1270 rule_add_key(&rule_tmp
, TK_M_PROGRAM
, op
, value
, NULL
);
1274 if (streq(key
, "RESULT")) {
1275 if (op
> OP_MATCH_MAX
) {
1276 log_error("invalid RESULT operation\n");
1279 rule_add_key(&rule_tmp
, TK_M_RESULT
, op
, value
, NULL
);
1283 if (startswith(key
, "IMPORT")) {
1284 attr
= get_key_attribute(rules
->udev
, key
+ sizeof("IMPORT")-1);
1286 log_error("IMPORT{} type missing, ignoring IMPORT %s:%u\n", filename
, lineno
);
1289 if (streq(attr
, "program")) {
1290 /* find known built-in command */
1291 if (value
[0] != '/') {
1292 enum udev_builtin_cmd cmd
;
1294 cmd
= udev_builtin_lookup(value
);
1295 if (cmd
< UDEV_BUILTIN_MAX
) {
1296 log_debug("IMPORT found builtin '%s', replacing %s:%u\n",
1297 value
, filename
, lineno
);
1298 rule_add_key(&rule_tmp
, TK_M_IMPORT_BUILTIN
, op
, value
, &cmd
);
1302 rule_add_key(&rule_tmp
, TK_M_IMPORT_PROG
, op
, value
, NULL
);
1303 } else if (streq(attr
, "builtin")) {
1304 enum udev_builtin_cmd cmd
= udev_builtin_lookup(value
);
1306 if (cmd
< UDEV_BUILTIN_MAX
)
1307 rule_add_key(&rule_tmp
, TK_M_IMPORT_BUILTIN
, op
, value
, &cmd
);
1309 log_error("IMPORT{builtin}: '%s' unknown %s:%u\n", value
, filename
, lineno
);
1310 } else if (streq(attr
, "file")) {
1311 rule_add_key(&rule_tmp
, TK_M_IMPORT_FILE
, op
, value
, NULL
);
1312 } else if (streq(attr
, "db")) {
1313 rule_add_key(&rule_tmp
, TK_M_IMPORT_DB
, op
, value
, NULL
);
1314 } else if (streq(attr
, "cmdline")) {
1315 rule_add_key(&rule_tmp
, TK_M_IMPORT_CMDLINE
, op
, value
, NULL
);
1316 } else if (streq(attr
, "parent")) {
1317 rule_add_key(&rule_tmp
, TK_M_IMPORT_PARENT
, op
, value
, NULL
);
1319 log_error("IMPORT{} unknown type, ignoring IMPORT %s:%u\n", filename
, lineno
);
1323 if (startswith(key
, "TEST")) {
1326 if (op
> OP_MATCH_MAX
) {
1327 log_error("invalid TEST operation\n");
1330 attr
= get_key_attribute(rules
->udev
, key
+ sizeof("TEST")-1);
1332 mode
= strtol(attr
, NULL
, 8);
1333 rule_add_key(&rule_tmp
, TK_M_TEST
, op
, value
, &mode
);
1335 rule_add_key(&rule_tmp
, TK_M_TEST
, op
, value
, NULL
);
1340 if (startswith(key
, "RUN")) {
1341 attr
= get_key_attribute(rules
->udev
, key
+ sizeof("RUN")-1);
1345 if (streq(attr
, "builtin")) {
1346 enum udev_builtin_cmd cmd
= udev_builtin_lookup(value
);
1348 if (cmd
< UDEV_BUILTIN_MAX
)
1349 rule_add_key(&rule_tmp
, TK_A_RUN_BUILTIN
, op
, value
, &cmd
);
1351 log_error("IMPORT{builtin}: '%s' unknown %s:%u\n", value
, filename
, lineno
);
1352 } else if (streq(attr
, "program")) {
1353 enum udev_builtin_cmd cmd
= UDEV_BUILTIN_MAX
;
1355 rule_add_key(&rule_tmp
, TK_A_RUN_PROGRAM
, op
, value
, &cmd
);
1357 log_error("RUN{} unknown type, ignoring RUN %s:%u\n", filename
, lineno
);
1363 if (streq(key
, "WAIT_FOR") || streq(key
, "WAIT_FOR_SYSFS")) {
1364 rule_add_key(&rule_tmp
, TK_M_WAITFOR
, 0, value
, NULL
);
1368 if (streq(key
, "LABEL")) {
1369 rule_tmp
.rule
.rule
.label_off
= rules_add_string(rules
, value
);
1373 if (streq(key
, "GOTO")) {
1374 rule_add_key(&rule_tmp
, TK_A_GOTO
, 0, value
, NULL
);
1378 if (startswith(key
, "NAME")) {
1379 if (op
< OP_MATCH_MAX
) {
1380 rule_add_key(&rule_tmp
, TK_M_NAME
, op
, value
, NULL
);
1382 if (streq(value
, "%k")) {
1383 log_error("NAME=\"%%k\" is ignored, because it breaks kernel supplied names, "
1384 "please remove it from %s:%u\n", filename
, lineno
);
1387 if (value
[0] == '\0') {
1388 log_debug("NAME=\"\" is ignored, because udev will not delete any device nodes, "
1389 "please remove it from %s:%u\n", filename
, lineno
);
1392 rule_add_key(&rule_tmp
, TK_A_NAME
, op
, value
, NULL
);
1394 rule_tmp
.rule
.rule
.can_set_name
= true;
1398 if (streq(key
, "SYMLINK")) {
1399 if (op
< OP_MATCH_MAX
)
1400 rule_add_key(&rule_tmp
, TK_M_DEVLINK
, op
, value
, NULL
);
1402 rule_add_key(&rule_tmp
, TK_A_DEVLINK
, op
, value
, NULL
);
1403 rule_tmp
.rule
.rule
.can_set_name
= true;
1407 if (streq(key
, "OWNER")) {
1411 uid
= strtoul(value
, &endptr
, 10);
1412 if (endptr
[0] == '\0') {
1413 rule_add_key(&rule_tmp
, TK_A_OWNER_ID
, op
, NULL
, &uid
);
1414 } else if ((rules
->resolve_names
> 0) && strchr("$%", value
[0]) == NULL
) {
1415 uid
= add_uid(rules
, value
);
1416 rule_add_key(&rule_tmp
, TK_A_OWNER_ID
, op
, NULL
, &uid
);
1417 } else if (rules
->resolve_names
>= 0) {
1418 rule_add_key(&rule_tmp
, TK_A_OWNER
, op
, value
, NULL
);
1420 rule_tmp
.rule
.rule
.can_set_name
= true;
1424 if (streq(key
, "GROUP")) {
1428 gid
= strtoul(value
, &endptr
, 10);
1429 if (endptr
[0] == '\0') {
1430 rule_add_key(&rule_tmp
, TK_A_GROUP_ID
, op
, NULL
, &gid
);
1431 } else if ((rules
->resolve_names
> 0) && strchr("$%", value
[0]) == NULL
) {
1432 gid
= add_gid(rules
, value
);
1433 rule_add_key(&rule_tmp
, TK_A_GROUP_ID
, op
, NULL
, &gid
);
1434 } else if (rules
->resolve_names
>= 0) {
1435 rule_add_key(&rule_tmp
, TK_A_GROUP
, op
, value
, NULL
);
1437 rule_tmp
.rule
.rule
.can_set_name
= true;
1441 if (streq(key
, "MODE")) {
1445 mode
= strtol(value
, &endptr
, 8);
1446 if (endptr
[0] == '\0')
1447 rule_add_key(&rule_tmp
, TK_A_MODE_ID
, op
, NULL
, &mode
);
1449 rule_add_key(&rule_tmp
, TK_A_MODE
, op
, value
, NULL
);
1450 rule_tmp
.rule
.rule
.can_set_name
= true;
1454 if (streq(key
, "OPTIONS")) {
1457 pos
= strstr(value
, "link_priority=");
1459 int prio
= atoi(&pos
[strlen("link_priority=")]);
1461 rule_add_key(&rule_tmp
, TK_A_DEVLINK_PRIO
, op
, NULL
, &prio
);
1464 pos
= strstr(value
, "event_timeout=");
1466 int tout
= atoi(&pos
[strlen("event_timeout=")]);
1468 rule_add_key(&rule_tmp
, TK_M_EVENT_TIMEOUT
, op
, NULL
, &tout
);
1471 pos
= strstr(value
, "string_escape=");
1473 pos
= &pos
[strlen("string_escape=")];
1474 if (startswith(pos
, "none"))
1475 rule_add_key(&rule_tmp
, TK_A_STRING_ESCAPE_NONE
, op
, NULL
, NULL
);
1476 else if (startswith(pos
, "replace"))
1477 rule_add_key(&rule_tmp
, TK_A_STRING_ESCAPE_REPLACE
, op
, NULL
, NULL
);
1480 pos
= strstr(value
, "db_persist");
1482 rule_add_key(&rule_tmp
, TK_A_DB_PERSIST
, op
, NULL
, NULL
);
1484 pos
= strstr(value
, "nowatch");
1488 rule_add_key(&rule_tmp
, TK_A_INOTIFY_WATCH
, op
, NULL
, &off
);
1490 pos
= strstr(value
, "watch");
1494 rule_add_key(&rule_tmp
, TK_A_INOTIFY_WATCH
, op
, NULL
, &on
);
1498 pos
= strstr(value
, "static_node=");
1500 rule_add_key(&rule_tmp
, TK_A_STATIC_NODE
, op
, &pos
[strlen("static_node=")], NULL
);
1501 rule_tmp
.rule
.rule
.has_static_node
= true;
1507 log_error("unknown key '%s' in %s:%u\n", key
, filename
, lineno
);
1511 /* add rule token */
1512 rule_tmp
.rule
.rule
.token_count
= 1 + rule_tmp
.token_cur
;
1513 if (add_token(rules
, &rule_tmp
.rule
) != 0)
1516 /* add tokens to list, sorted by type */
1517 if (sort_token(rules
, &rule_tmp
) != 0)
1522 log_error("invalid rule '%s:%u'\n", filename
, lineno
);
1526 static int parse_file(struct udev_rules
*rules
, const char *filename
)
1529 unsigned int first_token
;
1530 unsigned int filename_off
;
1531 char line
[UTIL_LINE_SIZE
];
1535 if (null_or_empty_path(filename
)) {
1536 log_debug("skip empty file: %s\n", filename
);
1539 log_debug("read rules file: %s\n", filename
);
1541 f
= fopen(filename
, "re");
1545 first_token
= rules
->token_cur
;
1546 filename_off
= rules_add_string(rules
, filename
);
1548 while (fgets(line
, sizeof(line
), f
) != NULL
) {
1552 /* skip whitespace */
1555 while (isspace(key
[0]))
1566 /* continue reading if backslash+newline is found */
1567 while (line
[len
-2] == '\\') {
1568 if (fgets(&line
[len
-2], (sizeof(line
)-len
)+2, f
) == NULL
)
1570 if (strlen(&line
[len
-2]) < 2)
1576 if (len
+1 >= sizeof(line
)) {
1577 log_error("line too long '%s':%u, ignored\n", filename
, line_nr
);
1580 add_rule(rules
, key
, filename
, filename_off
, line_nr
);
1584 /* link GOTOs to LABEL rules in this file to be able to fast-forward */
1585 for (i
= first_token
+1; i
< rules
->token_cur
; i
++) {
1586 if (rules
->tokens
[i
].type
== TK_A_GOTO
) {
1587 char *label
= rules_str(rules
, rules
->tokens
[i
].key
.value_off
);
1590 for (j
= i
+1; j
< rules
->token_cur
; j
++) {
1591 if (rules
->tokens
[j
].type
!= TK_RULE
)
1593 if (rules
->tokens
[j
].rule
.label_off
== 0)
1595 if (!streq(label
, rules_str(rules
, rules
->tokens
[j
].rule
.label_off
)))
1597 rules
->tokens
[i
].key
.rule_goto
= j
;
1600 if (rules
->tokens
[i
].key
.rule_goto
== 0)
1601 log_error("GOTO '%s' has no matching label in: '%s'\n", label
, filename
);
1607 struct udev_rules
*udev_rules_new(struct udev
*udev
, int resolve_names
)
1609 struct udev_rules
*rules
;
1610 struct udev_list file_list
;
1611 struct token end_token
;
1615 rules
= calloc(1, sizeof(struct udev_rules
));
1619 rules
->resolve_names
= resolve_names
;
1620 udev_list_init(udev
, &file_list
, true);
1622 /* init token array and string buffer */
1623 rules
->tokens
= malloc(PREALLOC_TOKEN
* sizeof(struct token
));
1624 if (rules
->tokens
== NULL
)
1625 return udev_rules_unref(rules
);
1626 rules
->token_max
= PREALLOC_TOKEN
;
1628 rules
->strbuf
= strbuf_new();
1630 return udev_rules_unref(rules
);
1632 rules
->dirs
= strv_new("/etc/udev/rules.d",
1633 "/run/udev/rules.d",
1634 UDEVLIBEXECDIR
"/rules.d",
1637 log_error("failed to build config directory array");
1638 return udev_rules_unref(rules
);
1640 if (!path_strv_canonicalize(rules
->dirs
)) {
1641 log_error("failed to canonicalize config directories\n");
1642 return udev_rules_unref(rules
);
1644 strv_uniq(rules
->dirs
);
1646 udev_rules_check_timestamp(rules
);
1648 r
= conf_files_list_strv(&files
, ".rules", NULL
, (const char **)rules
->dirs
);
1650 log_error("failed to enumerate rules files: %s\n", strerror(-r
));
1651 return udev_rules_unref(rules
);
1655 * The offset value in the rules strct is limited; add all
1656 * rules file names to the beginning of the string buffer.
1658 STRV_FOREACH(f
, files
)
1659 rules_add_string(rules
, *f
);
1661 STRV_FOREACH(f
, files
)
1662 parse_file(rules
, *f
);
1666 memset(&end_token
, 0x00, sizeof(struct token
));
1667 end_token
.type
= TK_END
;
1668 add_token(rules
, &end_token
);
1669 log_debug("rules contain %zu bytes tokens (%u * %zu bytes), %zu bytes strings\n",
1670 rules
->token_max
* sizeof(struct token
), rules
->token_max
, sizeof(struct token
), rules
->strbuf
->len
);
1672 /* cleanup temporary strbuf data */
1673 log_debug("%zu strings (%zu bytes), %zu de-duplicated (%zu bytes), %zu trie nodes used\n",
1674 rules
->strbuf
->in_count
, rules
->strbuf
->in_len
,
1675 rules
->strbuf
->dedup_count
, rules
->strbuf
->dedup_len
, rules
->strbuf
->nodes_count
);
1676 strbuf_complete(rules
->strbuf
);
1678 /* cleanup uid/gid cache */
1681 rules
->uids_cur
= 0;
1682 rules
->uids_max
= 0;
1685 rules
->gids_cur
= 0;
1686 rules
->gids_max
= 0;
1692 struct udev_rules
*udev_rules_unref(struct udev_rules
*rules
)
1696 free(rules
->tokens
);
1697 strbuf_cleanup(rules
->strbuf
);
1700 strv_free(rules
->dirs
);
1705 bool udev_rules_check_timestamp(struct udev_rules
*rules
)
1710 return paths_check_timestamp(rules
->dirs
, &rules
->dirs_ts_usec
, true);
1713 static int match_key(struct udev_rules
*rules
, struct token
*token
, const char *val
)
1715 char *key_value
= rules_str(rules
, token
->key
.value_off
);
1722 switch (token
->key
.glob
) {
1724 match
= (streq(key_value
, val
));
1727 match
= (fnmatch(key_value
, val
, 0) == 0);
1734 s
= rules_str(rules
, token
->key
.value_off
);
1739 next
= strchr(s
, '|');
1741 size_t matchlen
= (size_t)(next
- s
);
1743 match
= (matchlen
== len
&& strneq(s
, val
, matchlen
));
1747 match
= (streq(s
, val
));
1756 char value
[UTIL_PATH_SIZE
];
1758 strscpy(value
, sizeof(value
), rules_str(rules
, token
->key
.value_off
));
1760 while (key_value
!= NULL
) {
1761 pos
= strchr(key_value
, '|');
1766 match
= (fnmatch(key_value
, val
, 0) == 0);
1774 match
= (val
[0] != '\0');
1780 if (match
&& (token
->key
.op
== OP_MATCH
))
1782 if (!match
&& (token
->key
.op
== OP_NOMATCH
))
1787 static int match_attr(struct udev_rules
*rules
, struct udev_device
*dev
, struct udev_event
*event
, struct token
*cur
)
1790 char nbuf
[UTIL_NAME_SIZE
];
1792 char vbuf
[UTIL_NAME_SIZE
];
1795 name
= rules_str(rules
, cur
->key
.attr_off
);
1796 switch (cur
->key
.attrsubst
) {
1798 udev_event_apply_format(event
, name
, nbuf
, sizeof(nbuf
));
1802 value
= udev_device_get_sysattr_value(dev
, name
);
1807 if (util_resolve_subsys_kernel(event
->udev
, name
, vbuf
, sizeof(vbuf
), 1) != 0)
1815 /* remove trailing whitespace, if not asked to match for it */
1816 len
= strlen(value
);
1817 if (len
> 0 && isspace(value
[len
-1])) {
1818 const char *key_value
;
1821 key_value
= rules_str(rules
, cur
->key
.value_off
);
1822 klen
= strlen(key_value
);
1823 if (klen
> 0 && !isspace(key_value
[klen
-1])) {
1824 if (value
!= vbuf
) {
1825 strscpy(vbuf
, sizeof(vbuf
), value
);
1828 while (len
> 0 && isspace(vbuf
[--len
]))
1833 return match_key(rules
, cur
, value
);
1842 int udev_rules_apply_to_event(struct udev_rules
*rules
, struct udev_event
*event
, const sigset_t
*sigmask
)
1846 enum escape_type esc
= ESCAPE_UNSET
;
1849 if (rules
->tokens
== NULL
)
1852 can_set_name
= ((!streq(udev_device_get_action(event
->dev
), "remove")) &&
1853 (major(udev_device_get_devnum(event
->dev
)) > 0 ||
1854 udev_device_get_ifindex(event
->dev
) > 0));
1856 /* loop through token list, match, run actions or forward to next rule */
1857 cur
= &rules
->tokens
[0];
1860 dump_token(rules
, cur
);
1861 switch (cur
->type
) {
1865 /* possibly skip rules which want to set NAME, SYMLINK, OWNER, GROUP, MODE */
1866 if (!can_set_name
&& rule
->rule
.can_set_name
)
1871 if (match_key(rules
, cur
, udev_device_get_action(event
->dev
)) != 0)
1875 if (match_key(rules
, cur
, udev_device_get_devpath(event
->dev
)) != 0)
1879 if (match_key(rules
, cur
, udev_device_get_sysname(event
->dev
)) != 0)
1882 case TK_M_DEVLINK
: {
1883 struct udev_list_entry
*list_entry
;
1886 udev_list_entry_foreach(list_entry
, udev_device_get_devlinks_list_entry(event
->dev
)) {
1887 const char *devlink
;
1889 devlink
= udev_list_entry_get_name(list_entry
) + strlen("/dev/");
1890 if (match_key(rules
, cur
, devlink
) == 0) {
1900 if (match_key(rules
, cur
, event
->name
) != 0)
1904 const char *key_name
= rules_str(rules
, cur
->key
.attr_off
);
1907 value
= udev_device_get_property_value(event
->dev
, key_name
);
1910 if (match_key(rules
, cur
, value
))
1915 struct udev_list_entry
*list_entry
;
1918 udev_list_entry_foreach(list_entry
, udev_device_get_tags_list_entry(event
->dev
)) {
1919 if (streq(rules_str(rules
, cur
->key
.value_off
), udev_list_entry_get_name(list_entry
))) {
1924 if (!match
&& (cur
->key
.op
!= OP_NOMATCH
))
1928 case TK_M_SUBSYSTEM
:
1929 if (match_key(rules
, cur
, udev_device_get_subsystem(event
->dev
)) != 0)
1933 if (match_key(rules
, cur
, udev_device_get_driver(event
->dev
)) != 0)
1936 case TK_M_WAITFOR
: {
1937 char filename
[UTIL_PATH_SIZE
];
1940 udev_event_apply_format(event
, rules_str(rules
, cur
->key
.value_off
), filename
, sizeof(filename
));
1941 found
= (wait_for_file(event
->dev
, filename
, 10) == 0);
1942 if (!found
&& (cur
->key
.op
!= OP_NOMATCH
))
1947 if (match_attr(rules
, event
->dev
, event
, cur
) != 0)
1951 case TK_M_SUBSYSTEMS
:
1957 /* get whole sequence of parent matches */
1959 while (next
->type
> TK_M_PARENTS_MIN
&& next
->type
< TK_M_PARENTS_MAX
)
1962 /* loop over parents */
1963 event
->dev_parent
= event
->dev
;
1967 /* loop over sequence of parent match keys */
1968 for (key
= cur
; key
< next
; key
++ ) {
1969 dump_token(rules
, key
);
1972 if (match_key(rules
, key
, udev_device_get_sysname(event
->dev_parent
)) != 0)
1975 case TK_M_SUBSYSTEMS
:
1976 if (match_key(rules
, key
, udev_device_get_subsystem(event
->dev_parent
)) != 0)
1980 if (match_key(rules
, key
, udev_device_get_driver(event
->dev_parent
)) != 0)
1984 if (match_attr(rules
, event
->dev_parent
, event
, key
) != 0)
1988 bool match
= udev_device_has_tag(event
->dev_parent
, rules_str(rules
, cur
->key
.value_off
));
1990 if (match
&& key
->key
.op
== OP_NOMATCH
)
1992 if (!match
&& key
->key
.op
== OP_MATCH
)
2003 event
->dev_parent
= udev_device_get_parent(event
->dev_parent
);
2004 if (event
->dev_parent
== NULL
)
2007 /* move behind our sequence of parent match keys */
2012 char filename
[UTIL_PATH_SIZE
];
2013 struct stat statbuf
;
2016 udev_event_apply_format(event
, rules_str(rules
, cur
->key
.value_off
), filename
, sizeof(filename
));
2017 if (util_resolve_subsys_kernel(event
->udev
, filename
, filename
, sizeof(filename
), 0) != 0) {
2018 if (filename
[0] != '/') {
2019 char tmp
[UTIL_PATH_SIZE
];
2021 strscpy(tmp
, sizeof(tmp
), filename
);
2022 strscpyl(filename
, sizeof(filename
),
2023 udev_device_get_syspath(event
->dev
), "/", tmp
, NULL
);
2026 attr_subst_subdir(filename
, sizeof(filename
));
2028 match
= (stat(filename
, &statbuf
) == 0);
2029 if (match
&& cur
->key
.mode
> 0)
2030 match
= ((statbuf
.st_mode
& cur
->key
.mode
) > 0);
2031 if (match
&& cur
->key
.op
== OP_NOMATCH
)
2033 if (!match
&& cur
->key
.op
== OP_MATCH
)
2037 case TK_M_EVENT_TIMEOUT
:
2038 log_debug("OPTIONS event_timeout=%u\n", cur
->key
.event_timeout
);
2039 event
->timeout_usec
= cur
->key
.event_timeout
* 1000 * 1000;
2041 case TK_M_PROGRAM
: {
2042 char program
[UTIL_PATH_SIZE
];
2044 char result
[UTIL_PATH_SIZE
];
2046 free(event
->program_result
);
2047 event
->program_result
= NULL
;
2048 udev_event_apply_format(event
, rules_str(rules
, cur
->key
.value_off
), program
, sizeof(program
));
2049 envp
= udev_device_get_properties_envp(event
->dev
);
2050 log_debug("PROGRAM '%s' %s:%u\n",
2052 rules_str(rules
, rule
->rule
.filename_off
),
2053 rule
->rule
.filename_line
);
2055 if (udev_event_spawn(event
, program
, envp
, sigmask
, result
, sizeof(result
)) < 0) {
2056 if (cur
->key
.op
!= OP_NOMATCH
)
2061 util_remove_trailing_chars(result
, '\n');
2062 if (esc
== ESCAPE_UNSET
|| esc
== ESCAPE_REPLACE
) {
2063 count
= util_replace_chars(result
, UDEV_ALLOWED_CHARS_INPUT
);
2065 log_debug("%i character(s) replaced\n" , count
);
2067 event
->program_result
= strdup(result
);
2068 if (cur
->key
.op
== OP_NOMATCH
)
2073 case TK_M_IMPORT_FILE
: {
2074 char import
[UTIL_PATH_SIZE
];
2076 udev_event_apply_format(event
, rules_str(rules
, cur
->key
.value_off
), import
, sizeof(import
));
2077 if (import_file_into_properties(event
->dev
, import
) != 0)
2078 if (cur
->key
.op
!= OP_NOMATCH
)
2082 case TK_M_IMPORT_PROG
: {
2083 char import
[UTIL_PATH_SIZE
];
2085 udev_event_apply_format(event
, rules_str(rules
, cur
->key
.value_off
), import
, sizeof(import
));
2086 log_debug("IMPORT '%s' %s:%u\n",
2088 rules_str(rules
, rule
->rule
.filename_off
),
2089 rule
->rule
.filename_line
);
2091 if (import_program_into_properties(event
, import
, sigmask
) != 0)
2092 if (cur
->key
.op
!= OP_NOMATCH
)
2096 case TK_M_IMPORT_BUILTIN
: {
2097 char command
[UTIL_PATH_SIZE
];
2099 if (udev_builtin_run_once(cur
->key
.builtin_cmd
)) {
2100 /* check if we ran already */
2101 if (event
->builtin_run
& (1 << cur
->key
.builtin_cmd
)) {
2102 log_debug("IMPORT builtin skip '%s' %s:%u\n",
2103 udev_builtin_name(cur
->key
.builtin_cmd
),
2104 rules_str(rules
, rule
->rule
.filename_off
),
2105 rule
->rule
.filename_line
);
2106 /* return the result from earlier run */
2107 if (event
->builtin_ret
& (1 << cur
->key
.builtin_cmd
))
2108 if (cur
->key
.op
!= OP_NOMATCH
)
2113 event
->builtin_run
|= (1 << cur
->key
.builtin_cmd
);
2116 udev_event_apply_format(event
, rules_str(rules
, cur
->key
.value_off
), command
, sizeof(command
));
2117 log_debug("IMPORT builtin '%s' %s:%u\n",
2118 udev_builtin_name(cur
->key
.builtin_cmd
),
2119 rules_str(rules
, rule
->rule
.filename_off
),
2120 rule
->rule
.filename_line
);
2122 if (udev_builtin_run(event
->dev
, cur
->key
.builtin_cmd
, command
, false) != 0) {
2123 /* remember failure */
2124 log_debug("IMPORT builtin '%s' returned non-zero\n",
2125 udev_builtin_name(cur
->key
.builtin_cmd
));
2126 event
->builtin_ret
|= (1 << cur
->key
.builtin_cmd
);
2127 if (cur
->key
.op
!= OP_NOMATCH
)
2132 case TK_M_IMPORT_DB
: {
2133 const char *key
= rules_str(rules
, cur
->key
.value_off
);
2136 value
= udev_device_get_property_value(event
->dev_db
, key
);
2137 if (value
!= NULL
) {
2138 struct udev_list_entry
*entry
;
2140 entry
= udev_device_add_property(event
->dev
, key
, value
);
2141 udev_list_entry_set_num(entry
, true);
2143 if (cur
->key
.op
!= OP_NOMATCH
)
2148 case TK_M_IMPORT_CMDLINE
: {
2150 bool imported
= false;
2152 f
= fopen("/proc/cmdline", "re");
2156 if (fgets(cmdline
, sizeof(cmdline
), f
) != NULL
) {
2157 const char *key
= rules_str(rules
, cur
->key
.value_off
);
2160 pos
= strstr(cmdline
, key
);
2162 struct udev_list_entry
*entry
;
2165 if (pos
[0] == '\0' || isspace(pos
[0])) {
2166 /* we import simple flags as 'FLAG=1' */
2167 entry
= udev_device_add_property(event
->dev
, key
, "1");
2168 udev_list_entry_set_num(entry
, true);
2170 } else if (pos
[0] == '=') {
2175 while (pos
[0] != '\0' && !isspace(pos
[0]))
2178 entry
= udev_device_add_property(event
->dev
, key
, value
);
2179 udev_list_entry_set_num(entry
, true);
2186 if (!imported
&& cur
->key
.op
!= OP_NOMATCH
)
2190 case TK_M_IMPORT_PARENT
: {
2191 char import
[UTIL_PATH_SIZE
];
2193 udev_event_apply_format(event
, rules_str(rules
, cur
->key
.value_off
), import
, sizeof(import
));
2194 if (import_parent_into_properties(event
->dev
, import
) != 0)
2195 if (cur
->key
.op
!= OP_NOMATCH
)
2200 if (match_key(rules
, cur
, event
->program_result
) != 0)
2203 case TK_A_STRING_ESCAPE_NONE
:
2206 case TK_A_STRING_ESCAPE_REPLACE
:
2207 esc
= ESCAPE_REPLACE
;
2209 case TK_A_DB_PERSIST
:
2210 udev_device_set_db_persist(event
->dev
);
2212 case TK_A_INOTIFY_WATCH
:
2213 if (event
->inotify_watch_final
)
2215 if (cur
->key
.op
== OP_ASSIGN_FINAL
)
2216 event
->inotify_watch_final
= true;
2217 event
->inotify_watch
= cur
->key
.watch
;
2219 case TK_A_DEVLINK_PRIO
:
2220 udev_device_set_devlink_priority(event
->dev
, cur
->key
.devlink_prio
);
2223 char owner
[UTIL_NAME_SIZE
];
2225 if (event
->owner_final
)
2227 if (cur
->key
.op
== OP_ASSIGN_FINAL
)
2228 event
->owner_final
= true;
2229 udev_event_apply_format(event
, rules_str(rules
, cur
->key
.value_off
), owner
, sizeof(owner
));
2230 event
->owner_set
= true;
2231 event
->uid
= util_lookup_user(event
->udev
, owner
);
2232 log_debug("OWNER %u %s:%u\n",
2234 rules_str(rules
, rule
->rule
.filename_off
),
2235 rule
->rule
.filename_line
);
2239 char group
[UTIL_NAME_SIZE
];
2241 if (event
->group_final
)
2243 if (cur
->key
.op
== OP_ASSIGN_FINAL
)
2244 event
->group_final
= true;
2245 udev_event_apply_format(event
, rules_str(rules
, cur
->key
.value_off
), group
, sizeof(group
));
2246 event
->group_set
= true;
2247 event
->gid
= util_lookup_group(event
->udev
, group
);
2248 log_debug("GROUP %u %s:%u\n",
2250 rules_str(rules
, rule
->rule
.filename_off
),
2251 rule
->rule
.filename_line
);
2255 char mode_str
[UTIL_NAME_SIZE
];
2259 if (event
->mode_final
)
2261 udev_event_apply_format(event
, rules_str(rules
, cur
->key
.value_off
), mode_str
, sizeof(mode_str
));
2262 mode
= strtol(mode_str
, &endptr
, 8);
2263 if (endptr
[0] != '\0') {
2264 log_error("ignoring invalid mode '%s'\n", mode_str
);
2267 if (cur
->key
.op
== OP_ASSIGN_FINAL
)
2268 event
->mode_final
= true;
2269 event
->mode_set
= true;
2271 log_debug("MODE %#o %s:%u\n",
2273 rules_str(rules
, rule
->rule
.filename_off
),
2274 rule
->rule
.filename_line
);
2278 if (event
->owner_final
)
2280 if (cur
->key
.op
== OP_ASSIGN_FINAL
)
2281 event
->owner_final
= true;
2282 event
->owner_set
= true;
2283 event
->uid
= cur
->key
.uid
;
2284 log_debug("OWNER %u %s:%u\n",
2286 rules_str(rules
, rule
->rule
.filename_off
),
2287 rule
->rule
.filename_line
);
2290 if (event
->group_final
)
2292 if (cur
->key
.op
== OP_ASSIGN_FINAL
)
2293 event
->group_final
= true;
2294 event
->group_set
= true;
2295 event
->gid
= cur
->key
.gid
;
2296 log_debug("GROUP %u %s:%u\n",
2298 rules_str(rules
, rule
->rule
.filename_off
),
2299 rule
->rule
.filename_line
);
2302 if (event
->mode_final
)
2304 if (cur
->key
.op
== OP_ASSIGN_FINAL
)
2305 event
->mode_final
= true;
2306 event
->mode_set
= true;
2307 event
->mode
= cur
->key
.mode
;
2308 log_debug("MODE %#o %s:%u\n",
2310 rules_str(rules
, rule
->rule
.filename_off
),
2311 rule
->rule
.filename_line
);
2313 case TK_A_SECLABEL
: {
2314 const char *name
, *label
;
2316 name
= rules_str(rules
, cur
->key
.attr_off
);
2317 label
= rules_str(rules
, cur
->key
.value_off
);
2318 if (cur
->key
.op
== OP_ASSIGN
|| cur
->key
.op
== OP_ASSIGN_FINAL
)
2319 udev_list_cleanup(&event
->seclabel_list
);
2320 udev_list_entry_add(&event
->seclabel_list
, name
, label
);
2321 log_debug("SECLABEL{%s}='%s' %s:%u\n",
2323 rules_str(rules
, rule
->rule
.filename_off
),
2324 rule
->rule
.filename_line
);
2328 const char *name
= rules_str(rules
, cur
->key
.attr_off
);
2329 char *value
= rules_str(rules
, cur
->key
.value_off
);
2330 char value_new
[UTIL_NAME_SIZE
];
2331 const char *value_old
= NULL
;
2332 struct udev_list_entry
*entry
;
2334 if (value
[0] == '\0') {
2335 if (cur
->key
.op
== OP_ADD
)
2337 udev_device_add_property(event
->dev
, name
, NULL
);
2341 if (cur
->key
.op
== OP_ADD
)
2342 value_old
= udev_device_get_property_value(event
->dev
, name
);
2344 char temp
[UTIL_NAME_SIZE
];
2346 /* append value separated by space */
2347 udev_event_apply_format(event
, value
, temp
, sizeof(temp
));
2348 strscpyl(value_new
, sizeof(value_new
), value_old
, " ", temp
, NULL
);
2350 udev_event_apply_format(event
, value
, value_new
, sizeof(value_new
));
2352 entry
= udev_device_add_property(event
->dev
, name
, value_new
);
2353 /* store in db, skip private keys */
2355 udev_list_entry_set_num(entry
, true);
2359 char tag
[UTIL_PATH_SIZE
];
2362 udev_event_apply_format(event
, rules_str(rules
, cur
->key
.value_off
), tag
, sizeof(tag
));
2363 if (cur
->key
.op
== OP_ASSIGN
|| cur
->key
.op
== OP_ASSIGN_FINAL
)
2364 udev_device_cleanup_tags_list(event
->dev
);
2365 for (p
= tag
; *p
!= '\0'; p
++) {
2366 if ((*p
>= 'a' && *p
<= 'z') ||
2367 (*p
>= 'A' && *p
<= 'Z') ||
2368 (*p
>= '0' && *p
<= '9') ||
2369 *p
== '-' || *p
== '_')
2371 log_error("ignoring invalid tag name '%s'\n", tag
);
2374 udev_device_add_tag(event
->dev
, tag
);
2378 const char *name
= rules_str(rules
, cur
->key
.value_off
);
2380 char name_str
[UTIL_PATH_SIZE
];
2383 if (event
->name_final
)
2385 if (cur
->key
.op
== OP_ASSIGN_FINAL
)
2386 event
->name_final
= true;
2387 udev_event_apply_format(event
, name
, name_str
, sizeof(name_str
));
2388 if (esc
== ESCAPE_UNSET
|| esc
== ESCAPE_REPLACE
) {
2389 count
= util_replace_chars(name_str
, "/");
2391 log_debug("%i character(s) replaced\n", count
);
2393 if (major(udev_device_get_devnum(event
->dev
)) &&
2394 (!streq(name_str
, udev_device_get_devnode(event
->dev
) + strlen("/dev/")))) {
2395 log_error("NAME=\"%s\" ignored, kernel device nodes "
2396 "can not be renamed; please fix it in %s:%u\n", name
,
2397 rules_str(rules
, rule
->rule
.filename_off
), rule
->rule
.filename_line
);
2401 event
->name
= strdup(name_str
);
2402 log_debug("NAME '%s' %s:%u\n",
2404 rules_str(rules
, rule
->rule
.filename_off
),
2405 rule
->rule
.filename_line
);
2408 case TK_A_DEVLINK
: {
2409 char temp
[UTIL_PATH_SIZE
];
2410 char filename
[UTIL_PATH_SIZE
];
2414 if (event
->devlink_final
)
2416 if (major(udev_device_get_devnum(event
->dev
)) == 0)
2418 if (cur
->key
.op
== OP_ASSIGN_FINAL
)
2419 event
->devlink_final
= true;
2420 if (cur
->key
.op
== OP_ASSIGN
|| cur
->key
.op
== OP_ASSIGN_FINAL
)
2421 udev_device_cleanup_devlinks_list(event
->dev
);
2423 /* allow multiple symlinks separated by spaces */
2424 udev_event_apply_format(event
, rules_str(rules
, cur
->key
.value_off
), temp
, sizeof(temp
));
2425 if (esc
== ESCAPE_UNSET
)
2426 count
= util_replace_chars(temp
, "/ ");
2427 else if (esc
== ESCAPE_REPLACE
)
2428 count
= util_replace_chars(temp
, "/");
2430 log_debug("%i character(s) replaced\n" , count
);
2432 while (isspace(pos
[0]))
2434 next
= strchr(pos
, ' ');
2435 while (next
!= NULL
) {
2437 log_debug("LINK '%s' %s:%u\n", pos
,
2438 rules_str(rules
, rule
->rule
.filename_off
), rule
->rule
.filename_line
);
2439 strscpyl(filename
, sizeof(filename
), "/dev/", pos
, NULL
);
2440 udev_device_add_devlink(event
->dev
, filename
);
2441 while (isspace(next
[1]))
2444 next
= strchr(pos
, ' ');
2446 if (pos
[0] != '\0') {
2447 log_debug("LINK '%s' %s:%u\n", pos
,
2448 rules_str(rules
, rule
->rule
.filename_off
), rule
->rule
.filename_line
);
2449 strscpyl(filename
, sizeof(filename
), "/dev/", pos
, NULL
);
2450 udev_device_add_devlink(event
->dev
, filename
);
2455 const char *key_name
= rules_str(rules
, cur
->key
.attr_off
);
2456 char attr
[UTIL_PATH_SIZE
];
2457 char value
[UTIL_NAME_SIZE
];
2460 if (util_resolve_subsys_kernel(event
->udev
, key_name
, attr
, sizeof(attr
), 0) != 0)
2461 strscpyl(attr
, sizeof(attr
), udev_device_get_syspath(event
->dev
), "/", key_name
, NULL
);
2462 attr_subst_subdir(attr
, sizeof(attr
));
2464 udev_event_apply_format(event
, rules_str(rules
, cur
->key
.value_off
), value
, sizeof(value
));
2465 log_debug("ATTR '%s' writing '%s' %s:%u\n", attr
, value
,
2466 rules_str(rules
, rule
->rule
.filename_off
),
2467 rule
->rule
.filename_line
);
2468 f
= fopen(attr
, "we");
2470 if (fprintf(f
, "%s", value
) <= 0)
2471 log_error("error writing ATTR{%s}: %m\n", attr
);
2474 log_error("error opening ATTR{%s} for writing: %m\n", attr
);
2478 case TK_A_RUN_BUILTIN
:
2479 case TK_A_RUN_PROGRAM
: {
2480 struct udev_list_entry
*entry
;
2482 if (cur
->key
.op
== OP_ASSIGN
|| cur
->key
.op
== OP_ASSIGN_FINAL
)
2483 udev_list_cleanup(&event
->run_list
);
2484 log_debug("RUN '%s' %s:%u\n",
2485 rules_str(rules
, cur
->key
.value_off
),
2486 rules_str(rules
, rule
->rule
.filename_off
),
2487 rule
->rule
.filename_line
);
2488 entry
= udev_list_entry_add(&event
->run_list
, rules_str(rules
, cur
->key
.value_off
), NULL
);
2489 udev_list_entry_set_num(entry
, cur
->key
.builtin_cmd
);
2493 if (cur
->key
.rule_goto
== 0)
2495 cur
= &rules
->tokens
[cur
->key
.rule_goto
];
2500 case TK_M_PARENTS_MIN
:
2501 case TK_M_PARENTS_MAX
:
2504 log_error("wrong type %u\n", cur
->type
);
2511 /* fast-forward to next rule */
2512 cur
= rule
+ rule
->rule
.token_count
;
2516 int udev_rules_apply_static_dev_perms(struct udev_rules
*rules
)
2523 _cleanup_strv_free_
char **tags
= NULL
;
2526 _cleanup_free_
char *path
= NULL
;
2529 if (rules
->tokens
== NULL
)
2532 cur
= &rules
->tokens
[0];
2535 switch (cur
->type
) {
2540 /* skip rules without a static_node tag */
2541 if (!rule
->rule
.has_static_node
)
2557 mode
= cur
->key
.mode
;
2560 r
= strv_extend(&tags
, rules_str(rules
, cur
->key
.value_off
));
2565 case TK_A_STATIC_NODE
: {
2566 char device_node
[UTIL_PATH_SIZE
];
2567 char tags_dir
[UTIL_PATH_SIZE
];
2568 char tag_symlink
[UTIL_PATH_SIZE
];
2571 /* we assure, that the permissions tokens are sorted before the static token */
2572 if (mode
== 0 && uid
== 0 && gid
== 0 && tags
== NULL
)
2574 strscpyl(device_node
, sizeof(device_node
), "/dev/", rules_str(rules
, cur
->key
.value_off
), NULL
);
2575 if (stat(device_node
, &stats
) != 0)
2577 if (!S_ISBLK(stats
.st_mode
) && !S_ISCHR(stats
.st_mode
))
2581 /* Export the tags to a directory as symlinks, allowing otherwise dead nodes to be tagged */
2583 STRV_FOREACH(t
, tags
) {
2584 _cleanup_free_
char *unescaped_filename
= NULL
;
2586 strscpyl(tags_dir
, sizeof(tags_dir
), "/run/udev/static_node-tags/", *t
, "/", NULL
);
2587 r
= mkdir_p(tags_dir
, 0755);
2589 log_error("failed to create %s: %s\n", tags_dir
, strerror(-r
));
2593 unescaped_filename
= xescape(rules_str(rules
, cur
->key
.value_off
), "/.");
2595 strscpyl(tag_symlink
, sizeof(tag_symlink
), tags_dir
, unescaped_filename
, NULL
);
2596 r
= symlink(device_node
, tag_symlink
);
2597 if (r
< 0 && errno
!= EEXIST
) {
2598 log_error("failed to create symlink %s -> %s: %m\n", tag_symlink
, device_node
);
2605 /* don't touch the permissions if only the tags were set */
2606 if (mode
== 0 && uid
== 0 && gid
== 0)
2615 if (mode
!= (stats
.st_mode
& 01777)) {
2616 r
= chmod(device_node
, mode
);
2618 log_error("failed to chmod '%s' %#o\n", device_node
, mode
);
2621 log_debug("chmod '%s' %#o\n", device_node
, mode
);
2624 if ((uid
!= 0 && uid
!= stats
.st_uid
) || (gid
!= 0 && gid
!= stats
.st_gid
)) {
2625 r
= chown(device_node
, uid
, gid
);
2627 log_error("failed to chown '%s' %u %u \n", device_node
, uid
, gid
);
2630 log_debug("chown '%s' %u %u\n", device_node
, uid
, gid
);
2633 utimensat(AT_FDCWD
, device_node
, NULL
, 0);
2643 /* fast-forward to next rule */
2644 cur
= rule
+ rule
->rule
.token_count
;
2651 fchmod(fileno(f
), 0644);
2652 if (ferror(f
) || rename(path
, "/run/udev/static_node-tags") < 0) {
2654 unlink("/run/udev/static_node-tags");