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e7145211 | 1 | /* SPDX-License-Identifier: GPL-2.0+ */ |
2232cac8 | 2 | |
2232cac8 | 3 | #include <ctype.h> |
2232cac8 | 4 | |
b5efdb8a | 5 | #include "alloc-util.h" |
2c21044f | 6 | #include "conf-files.h" |
116b91e8 | 7 | #include "def.h" |
480ecb7d | 8 | #include "device-util.h" |
8fb3f009 | 9 | #include "dirent-util.h" |
4f5dd394 | 10 | #include "escape.h" |
3ffd4af2 | 11 | #include "fd-util.h" |
fae0f8a0 | 12 | #include "fileio.h" |
4b3b5bc7 | 13 | #include "format-util.h" |
fdd21be6 | 14 | #include "fs-util.h" |
7d50b32a | 15 | #include "glob-util.h" |
5ea78a39 | 16 | #include "libudev-util.h" |
e79c228b | 17 | #include "list.h" |
5ea78a39 | 18 | #include "mkdir.h" |
25de7aa7 | 19 | #include "nulstr-util.h" |
b4ba2fe3 | 20 | #include "parse-util.h" |
4f5dd394 | 21 | #include "path-util.h" |
88b013b2 | 22 | #include "proc-cmdline.h" |
8fcde012 | 23 | #include "stat-util.h" |
84b6ad70 | 24 | #include "strv.h" |
5ea78a39 | 25 | #include "strxcpyx.h" |
f4cf2e5b | 26 | #include "sysctl-util.h" |
07a26e42 | 27 | #include "udev-builtin.h" |
25de7aa7 YW |
28 | #include "udev-event.h" |
29 | #include "udev-rules.h" | |
b1d4f8e1 | 30 | #include "user-util.h" |
2232cac8 | 31 | |
116b91e8 | 32 | #define RULES_DIRS (const char* const*) CONF_PATHS_STRV("udev/rules.d") |
c7521974 | 33 | |
e79c228b ZJS |
34 | typedef enum { |
35 | OP_MATCH, /* == */ | |
36 | OP_NOMATCH, /* != */ | |
37 | OP_ADD, /* += */ | |
38 | OP_REMOVE, /* -= */ | |
39 | OP_ASSIGN, /* = */ | |
40 | OP_ASSIGN_FINAL, /* := */ | |
41 | _OP_TYPE_MAX, | |
42 | _OP_TYPE_INVALID = -1 | |
43 | } UdevRuleOperatorType; | |
44 | ||
45 | typedef enum { | |
46 | MATCH_TYPE_EMPTY, /* empty string */ | |
47 | MATCH_TYPE_PLAIN, /* no special characters */ | |
48 | MATCH_TYPE_GLOB, /* shell globs ?,*,[] */ | |
49 | MATCH_TYPE_SUBSYSTEM, /* "subsystem", "bus", or "class" */ | |
50 | _MATCH_TYPE_MAX, | |
51 | _MATCH_TYPE_INVALID = -1 | |
52 | } UdevRuleMatchType; | |
53 | ||
54 | typedef enum { | |
55 | SUBST_TYPE_PLAIN, /* no substitution */ | |
56 | SUBST_TYPE_FORMAT, /* % or $ */ | |
57 | SUBST_TYPE_SUBSYS, /* "[<SUBSYSTEM>/<KERNEL>]<attribute>" format */ | |
58 | _SUBST_TYPE_MAX, | |
59 | _SUBST_TYPE_INVALID = -1 | |
60 | } UdevRuleSubstituteType; | |
61 | ||
62 | typedef enum { | |
63 | /* lvalues which take match or nomatch operator */ | |
64 | TK_M_ACTION, /* string, device_get_action() */ | |
65 | TK_M_DEVPATH, /* path, sd_device_get_devpath() */ | |
66 | TK_M_KERNEL, /* string, sd_device_get_sysname() */ | |
67 | TK_M_DEVLINK, /* strv, sd_device_get_devlink_first(), sd_device_get_devlink_next() */ | |
68 | TK_M_NAME, /* string, name of network interface */ | |
69 | TK_M_ENV, /* string, device property, takes key through attribute */ | |
70 | TK_M_TAG, /* strv, sd_device_get_tag_first(), sd_device_get_tag_next() */ | |
71 | TK_M_SUBSYSTEM, /* string, sd_device_get_subsystem() */ | |
72 | TK_M_DRIVER, /* string, sd_device_get_driver() */ | |
73 | TK_M_ATTR, /* string, takes filename through attribute, sd_device_get_sysattr_value(), util_resolve_subsys_kernel(), etc. */ | |
74 | TK_M_SYSCTL, /* string, takes kernel parameter through attribute */ | |
75 | ||
76 | /* matches parent paramters */ | |
77 | TK_M_PARENTS_KERNEL, /* string */ | |
78 | TK_M_PARENTS_SUBSYSTEM, /* string */ | |
79 | TK_M_PARENTS_DRIVER, /* string */ | |
80 | TK_M_PARENTS_ATTR, /* string */ | |
81 | TK_M_PARENTS_TAG, /* strv */ | |
82 | ||
83 | TK_M_TEST, /* path, optionally mode_t can be specified by attribute, test the existence of a file */ | |
84 | TK_M_PROGRAM, /* string, execute a program */ | |
85 | TK_M_IMPORT_FILE, /* path */ | |
86 | TK_M_IMPORT_PROGRAM, /* string, import properties from the result of program */ | |
87 | TK_M_IMPORT_BUILTIN, /* string, import properties from the result of built-in command */ | |
88 | TK_M_IMPORT_DB, /* string, import properties from database */ | |
89 | TK_M_IMPORT_CMDLINE, /* string, kernel command line */ | |
90 | TK_M_IMPORT_PARENT, /* string, parent property */ | |
91 | TK_M_RESULT, /* string, result of TK_M_PROGRAM */ | |
92 | ||
93 | #define _TK_M_MAX (TK_M_RESULT + 1) | |
94 | #define _TK_A_MIN _TK_M_MAX | |
95 | ||
96 | /* lvalues which take one of assign operators */ | |
97 | TK_A_OPTIONS_STRING_ESCAPE_NONE, /* no argument */ | |
98 | TK_A_OPTIONS_STRING_ESCAPE_REPLACE, /* no argument */ | |
99 | TK_A_OPTIONS_DB_PERSIST, /* no argument */ | |
100 | TK_A_OPTIONS_INOTIFY_WATCH, /* boolean */ | |
101 | TK_A_OPTIONS_DEVLINK_PRIORITY, /* int */ | |
102 | TK_A_OWNER, /* user name */ | |
103 | TK_A_GROUP, /* group name */ | |
104 | TK_A_MODE, /* mode string */ | |
105 | TK_A_OWNER_ID, /* uid_t */ | |
106 | TK_A_GROUP_ID, /* gid_t */ | |
107 | TK_A_MODE_ID, /* mode_t */ | |
108 | TK_A_TAG, /* string */ | |
109 | TK_A_OPTIONS_STATIC_NODE, /* device path, /dev/... */ | |
110 | TK_A_SECLABEL, /* string with attribute */ | |
111 | TK_A_ENV, /* string with attribute */ | |
112 | TK_A_NAME, /* ifname */ | |
113 | TK_A_DEVLINK, /* string */ | |
114 | TK_A_ATTR, /* string with attribute */ | |
115 | TK_A_SYSCTL, /* string with attribute */ | |
116 | TK_A_RUN_BUILTIN, /* string */ | |
117 | TK_A_RUN_PROGRAM, /* string */ | |
118 | ||
119 | _TK_TYPE_MAX, | |
120 | _TK_TYPE_INVALID = -1, | |
121 | } UdevRuleTokenType; | |
122 | ||
123 | typedef enum { | |
124 | LINE_HAS_NAME = 1 << 0, /* has NAME= */ | |
125 | LINE_HAS_DEVLINK = 1 << 1, /* has SYMLINK=, OWNER=, GROUP= or MODE= */ | |
126 | LINE_HAS_STATIC_NODE = 1 << 2, /* has OPTIONS=static_node */ | |
127 | LINE_HAS_GOTO = 1 << 3, /* has GOTO= */ | |
128 | LINE_HAS_LABEL = 1 << 4, /* has LABEL= */ | |
129 | LINE_UPDATE_SOMETHING = 1 << 5, /* has other TK_A_* or TK_M_IMPORT tokens */ | |
130 | } UdevRuleLineType; | |
131 | ||
132 | typedef struct UdevRuleFile UdevRuleFile; | |
133 | typedef struct UdevRuleLine UdevRuleLine; | |
134 | typedef struct UdevRuleToken UdevRuleToken; | |
135 | ||
136 | struct UdevRuleToken { | |
137 | UdevRuleTokenType type:8; | |
138 | UdevRuleOperatorType op:8; | |
139 | UdevRuleMatchType match_type:8; | |
140 | UdevRuleSubstituteType attr_subst_type:7; | |
141 | bool attr_match_remove_trailing_whitespace:1; | |
142 | const char *value; | |
143 | void *data; | |
144 | LIST_FIELDS(UdevRuleToken, tokens); | |
145 | }; | |
146 | ||
147 | struct UdevRuleLine { | |
148 | char *line; | |
149 | unsigned line_number; | |
150 | UdevRuleLineType type; | |
151 | ||
152 | const char *label; | |
153 | const char *goto_label; | |
154 | UdevRuleLine *goto_line; | |
155 | ||
156 | UdevRuleFile *rule_file; | |
157 | UdevRuleToken *current_token; | |
158 | LIST_HEAD(UdevRuleToken, tokens); | |
159 | LIST_FIELDS(UdevRuleLine, rule_lines); | |
160 | }; | |
161 | ||
162 | struct UdevRuleFile { | |
163 | char *filename; | |
164 | UdevRuleLine *current_line; | |
165 | LIST_HEAD(UdevRuleLine, rule_lines); | |
166 | LIST_FIELDS(UdevRuleFile, rule_files); | |
167 | }; | |
168 | ||
169 | struct UdevRules { | |
170 | usec_t dirs_ts_usec; | |
171 | ResolveNameTiming resolve_name_timing; | |
172 | Hashmap *known_users; | |
173 | Hashmap *known_groups; | |
174 | UdevRuleFile *current_file; | |
175 | LIST_HEAD(UdevRuleFile, rule_files); | |
176 | }; | |
177 | ||
d4114f70 ZJS |
178 | /*** Logging helpers ***/ |
179 | ||
180 | #define log_rule_full(device, rules, level, error, fmt, ...) \ | |
181 | ({ \ | |
182 | UdevRules *_r = (rules); \ | |
183 | UdevRuleFile *_f = _r ? _r->current_file : NULL; \ | |
184 | UdevRuleLine *_l = _f ? _f->current_line : NULL; \ | |
185 | const char *_n = _f ? _f->filename : NULL; \ | |
186 | \ | |
187 | log_device_full(device, level, error, "%s:%u " fmt, \ | |
188 | strna(_n), _l ? _l->line_number : 0, \ | |
189 | ##__VA_ARGS__); \ | |
190 | }) | |
191 | ||
192 | #define log_rule_debug(device, rules, ...) log_rule_full(device, rules, LOG_DEBUG, 0, ##__VA_ARGS__) | |
193 | #define log_rule_info(device, rules, ...) log_rule_full(device, rules, LOG_INFO, 0, ##__VA_ARGS__) | |
194 | #define log_rule_notice(device, rules, ...) log_rule_full(device, rules, LOG_NOTICE, 0, ##__VA_ARGS__) | |
195 | #define log_rule_warning(device, rules, ...) log_rule_full(device, rules, LOG_WARNING, 0, ##__VA_ARGS__) | |
196 | #define log_rule_error(device, rules, ...) log_rule_full(device, rules, LOG_ERR, 0, ##__VA_ARGS__) | |
197 | ||
198 | #define log_rule_debug_errno(device, rules, error, ...) log_rule_full(device, rules, LOG_DEBUG, error, ##__VA_ARGS__) | |
199 | #define log_rule_info_errno(device, rules, error, ...) log_rule_full(device, rules, LOG_INFO, error, ##__VA_ARGS__) | |
200 | #define log_rule_notice_errno(device, rules, error, ...) log_rule_full(device, rules, LOG_NOTICE, error, ##__VA_ARGS__) | |
201 | #define log_rule_warning_errno(device, rules, error, ...) log_rule_full(device, rules, LOG_WARNING, error, ##__VA_ARGS__) | |
202 | #define log_rule_error_errno(device, rules, error, ...) log_rule_full(device, rules, LOG_ERR, error, ##__VA_ARGS__) | |
203 | ||
204 | #define log_token_full(rules, ...) log_rule_full(NULL, rules, ##__VA_ARGS__) | |
205 | ||
206 | #define log_token_debug(rules, ...) log_token_full(rules, LOG_DEBUG, 0, ##__VA_ARGS__) | |
207 | #define log_token_info(rules, ...) log_token_full(rules, LOG_INFO, 0, ##__VA_ARGS__) | |
208 | #define log_token_notice(rules, ...) log_token_full(rules, LOG_NOTICE, 0, ##__VA_ARGS__) | |
209 | #define log_token_warning(rules, ...) log_token_full(rules, LOG_WARNING, 0, ##__VA_ARGS__) | |
210 | #define log_token_error(rules, ...) log_token_full(rules, LOG_ERR, 0, ##__VA_ARGS__) | |
211 | ||
212 | #define log_token_debug_errno(rules, error, ...) log_token_full(rules, LOG_DEBUG, error, ##__VA_ARGS__) | |
213 | #define log_token_info_errno(rules, error, ...) log_token_full(rules, LOG_INFO, error, ##__VA_ARGS__) | |
214 | #define log_token_notice_errno(rules, error, ...) log_token_full(rules, LOG_NOTICE, error, ##__VA_ARGS__) | |
215 | #define log_token_warning_errno(rules, error, ...) log_token_full(rules, LOG_WARNING, error, ##__VA_ARGS__) | |
216 | #define log_token_error_errno(rules, error, ...) log_token_full(rules, LOG_ERR, error, ##__VA_ARGS__) | |
217 | ||
218 | #define _log_token_invalid(rules, key, type) \ | |
219 | log_token_error_errno(rules, SYNTHETIC_ERRNO(EINVAL), \ | |
220 | "Invalid %s for %s.", type, key) | |
221 | ||
222 | #define log_token_invalid_op(rules, key) _log_token_invalid(rules, key, "operator") | |
223 | #define log_token_invalid_attr(rules, key) _log_token_invalid(rules, key, "attribute") | |
224 | ||
7504610b | 225 | #define log_token_invalid_attr_format(rules, key, attr, offset, hint) \ |
d4114f70 | 226 | log_token_error_errno(rules, SYNTHETIC_ERRNO(EINVAL), \ |
7504610b ZJS |
227 | "Invalid attribute \"%s\" for %s (char %zu: %s), ignoring, but please fix it.", \ |
228 | attr, key, offset, hint) | |
f85cc54c | 229 | #define log_token_invalid_value(rules, key, value, offset, hint) \ |
d4114f70 | 230 | log_token_error_errno(rules, SYNTHETIC_ERRNO(EINVAL), \ |
f85cc54c ZJS |
231 | "Invalid value \"%s\" for %s (char %zu: %s), ignoring, but please fix it.", \ |
232 | value, key, offset, hint) | |
d4114f70 ZJS |
233 | |
234 | static void log_unknown_owner(sd_device *dev, UdevRules *rules, int error, const char *entity, const char *name) { | |
235 | if (IN_SET(abs(error), ENOENT, ESRCH)) | |
236 | log_rule_error(dev, rules, "Unknown %s '%s', ignoring", entity, name); | |
237 | else | |
238 | log_rule_error_errno(dev, rules, error, "Failed to resolve %s '%s', ignoring: %m", entity, name); | |
239 | } | |
240 | ||
241 | /*** Other functions ***/ | |
242 | ||
25de7aa7 YW |
243 | static void udev_rule_token_free(UdevRuleToken *token) { |
244 | free(token); | |
915bf0f6 KS |
245 | } |
246 | ||
25de7aa7 YW |
247 | static void udev_rule_line_clear_tokens(UdevRuleLine *rule_line) { |
248 | UdevRuleToken *i, *next; | |
912541b0 | 249 | |
25de7aa7 | 250 | assert(rule_line); |
4052400f | 251 | |
25de7aa7 YW |
252 | LIST_FOREACH_SAFE(tokens, i, next, rule_line->tokens) |
253 | udev_rule_token_free(i); | |
912541b0 | 254 | |
25de7aa7 | 255 | rule_line->tokens = NULL; |
5d6a1fa6 KS |
256 | } |
257 | ||
25de7aa7 YW |
258 | static void udev_rule_line_free(UdevRuleLine *rule_line) { |
259 | if (!rule_line) | |
260 | return; | |
912541b0 | 261 | |
25de7aa7 | 262 | udev_rule_line_clear_tokens(rule_line); |
c7521974 | 263 | |
25de7aa7 YW |
264 | if (rule_line->rule_file) { |
265 | if (rule_line->rule_file->current_line == rule_line) | |
266 | rule_line->rule_file->current_line = rule_line->rule_lines_prev; | |
267 | ||
268 | LIST_REMOVE(rule_lines, rule_line->rule_file->rule_lines, rule_line); | |
912541b0 | 269 | } |
25de7aa7 YW |
270 | |
271 | free(rule_line->line); | |
272 | free(rule_line); | |
4052400f | 273 | } |
154a7b84 | 274 | |
25de7aa7 YW |
275 | DEFINE_TRIVIAL_CLEANUP_FUNC(UdevRuleLine*, udev_rule_line_free); |
276 | ||
277 | static void udev_rule_file_free(UdevRuleFile *rule_file) { | |
278 | UdevRuleLine *i, *next; | |
279 | ||
280 | if (!rule_file) | |
281 | return; | |
282 | ||
283 | LIST_FOREACH_SAFE(rule_lines, i, next, rule_file->rule_lines) | |
284 | udev_rule_line_free(i); | |
912541b0 | 285 | |
25de7aa7 YW |
286 | free(rule_file->filename); |
287 | free(rule_file); | |
4052400f | 288 | } |
530727ae | 289 | |
25de7aa7 YW |
290 | UdevRules *udev_rules_free(UdevRules *rules) { |
291 | UdevRuleFile *i, *next; | |
292 | ||
293 | if (!rules) | |
294 | return NULL; | |
295 | ||
296 | LIST_FOREACH_SAFE(rule_files, i, next, rules->rule_files) | |
297 | udev_rule_file_free(i); | |
298 | ||
299 | hashmap_free_free_key(rules->known_users); | |
300 | hashmap_free_free_key(rules->known_groups); | |
301 | return mfree(rules); | |
c7521974 | 302 | } |
a27cd06c | 303 | |
25de7aa7 YW |
304 | static int rule_resolve_user(UdevRules *rules, const char *name, uid_t *ret) { |
305 | _cleanup_free_ char *n = NULL; | |
306 | uid_t uid; | |
307 | void *val; | |
23bf8dd7 | 308 | int r; |
912541b0 | 309 | |
25de7aa7 YW |
310 | assert(rules); |
311 | assert(name); | |
312 | ||
313 | val = hashmap_get(rules->known_users, name); | |
314 | if (val) { | |
315 | *ret = PTR_TO_UID(val); | |
316 | return 0; | |
317 | } | |
318 | ||
319 | r = get_user_creds(&name, &uid, NULL, NULL, NULL, USER_CREDS_ALLOW_MISSING); | |
320 | if (r < 0) { | |
321 | log_unknown_owner(NULL, rules, r, "user", name); | |
322 | *ret = UID_INVALID; | |
323 | return 0; | |
912541b0 | 324 | } |
912541b0 | 325 | |
25de7aa7 YW |
326 | n = strdup(name); |
327 | if (!n) | |
530727ae YW |
328 | return -ENOMEM; |
329 | ||
25de7aa7 YW |
330 | r = hashmap_ensure_allocated(&rules->known_users, &string_hash_ops); |
331 | if (r < 0) | |
332 | return r; | |
333 | ||
334 | r = hashmap_put(rules->known_users, n, UID_TO_PTR(uid)); | |
335 | if (r < 0) | |
336 | return r; | |
337 | ||
338 | TAKE_PTR(n); | |
339 | *ret = uid; | |
340 | return 0; | |
154a7b84 KS |
341 | } |
342 | ||
25de7aa7 YW |
343 | static int rule_resolve_group(UdevRules *rules, const char *name, gid_t *ret) { |
344 | _cleanup_free_ char *n = NULL; | |
345 | gid_t gid; | |
346 | void *val; | |
23bf8dd7 | 347 | int r; |
912541b0 | 348 | |
25de7aa7 YW |
349 | assert(rules); |
350 | assert(name); | |
351 | ||
352 | val = hashmap_get(rules->known_groups, name); | |
353 | if (val) { | |
354 | *ret = PTR_TO_GID(val); | |
355 | return 0; | |
356 | } | |
357 | ||
358 | r = get_group_creds(&name, &gid, USER_CREDS_ALLOW_MISSING); | |
359 | if (r < 0) { | |
360 | log_unknown_owner(NULL, rules, r, "group", name); | |
361 | *ret = GID_INVALID; | |
362 | return 0; | |
912541b0 | 363 | } |
912541b0 | 364 | |
25de7aa7 YW |
365 | n = strdup(name); |
366 | if (!n) | |
530727ae YW |
367 | return -ENOMEM; |
368 | ||
25de7aa7 YW |
369 | r = hashmap_ensure_allocated(&rules->known_groups, &string_hash_ops); |
370 | if (r < 0) | |
371 | return r; | |
372 | ||
373 | r = hashmap_put(rules->known_groups, n, GID_TO_PTR(gid)); | |
374 | if (r < 0) | |
375 | return r; | |
376 | ||
377 | TAKE_PTR(n); | |
378 | *ret = gid; | |
379 | return 0; | |
154a7b84 KS |
380 | } |
381 | ||
25de7aa7 YW |
382 | static UdevRuleSubstituteType rule_get_substitution_type(const char *str) { |
383 | assert(str); | |
912541b0 | 384 | |
25de7aa7 YW |
385 | if (str[0] == '[') |
386 | return SUBST_TYPE_SUBSYS; | |
387 | if (strchr(str, '%') || strchr(str, '$')) | |
388 | return SUBST_TYPE_FORMAT; | |
389 | return SUBST_TYPE_PLAIN; | |
390 | } | |
912541b0 | 391 | |
25de7aa7 YW |
392 | static void rule_line_append_token(UdevRuleLine *rule_line, UdevRuleToken *token) { |
393 | assert(rule_line); | |
394 | assert(token); | |
912541b0 | 395 | |
25de7aa7 YW |
396 | if (rule_line->current_token) |
397 | LIST_APPEND(tokens, rule_line->current_token, token); | |
398 | else | |
399 | LIST_APPEND(tokens, rule_line->tokens, token); | |
912541b0 | 400 | |
25de7aa7 YW |
401 | rule_line->current_token = token; |
402 | } | |
912541b0 | 403 | |
25de7aa7 YW |
404 | static int rule_line_add_token(UdevRuleLine *rule_line, UdevRuleTokenType type, UdevRuleOperatorType op, char *value, void *data) { |
405 | UdevRuleToken *token; | |
406 | UdevRuleMatchType match_type = _MATCH_TYPE_INVALID; | |
407 | UdevRuleSubstituteType subst_type = _SUBST_TYPE_INVALID; | |
408 | bool remove_trailing_whitespace = false; | |
409 | size_t len; | |
912541b0 | 410 | |
25de7aa7 YW |
411 | assert(rule_line); |
412 | assert(type >= 0 && type < _TK_TYPE_MAX); | |
413 | assert(op >= 0 && op < _OP_TYPE_MAX); | |
414 | ||
415 | if (type < _TK_M_MAX) { | |
416 | assert(value); | |
417 | assert(IN_SET(op, OP_MATCH, OP_NOMATCH)); | |
418 | ||
419 | if (type == TK_M_SUBSYSTEM && STR_IN_SET(value, "subsystem", "bus", "class")) | |
420 | match_type = MATCH_TYPE_SUBSYSTEM; | |
421 | else if (isempty(value)) | |
422 | match_type = MATCH_TYPE_EMPTY; | |
423 | else if (streq(value, "?*")) { | |
424 | /* Convert KEY=="?*" -> KEY!="" */ | |
425 | match_type = MATCH_TYPE_EMPTY; | |
426 | op = op == OP_MATCH ? OP_NOMATCH : OP_MATCH; | |
427 | } else if (string_is_glob(value)) | |
428 | match_type = MATCH_TYPE_GLOB; | |
429 | else | |
430 | match_type = MATCH_TYPE_PLAIN; | |
912541b0 | 431 | |
25de7aa7 YW |
432 | if (type < TK_M_TEST || type == TK_M_RESULT) { |
433 | /* Convert value string to nulstr. */ | |
434 | len = strlen(value); | |
435 | if (len > 1 && (value[len - 1] == '|' || strstr(value, "||"))) { | |
436 | /* In this case, just replacing '|' -> '\0' does not work... */ | |
437 | _cleanup_free_ char *tmp = NULL; | |
438 | char *i, *j; | |
439 | bool v = true; | |
440 | ||
441 | tmp = strdup(value); | |
442 | if (!tmp) | |
443 | return log_oom(); | |
912541b0 | 444 | |
25de7aa7 YW |
445 | for (i = tmp, j = value; *i != '\0'; i++) |
446 | if (*i == '|') | |
447 | v = true; | |
448 | else { | |
449 | if (v) { | |
450 | *j++ = '\0'; | |
451 | v = false; | |
452 | } | |
453 | *j++ = *i; | |
454 | } | |
455 | j[0] = j[1] = '\0'; | |
456 | } else { | |
457 | /* Simple conversion. */ | |
458 | char *i; | |
459 | ||
460 | for (i = value; *i != '\0'; i++) | |
461 | if (*i == '|') | |
462 | *i = '\0'; | |
463 | } | |
464 | } | |
912541b0 KS |
465 | } |
466 | ||
25de7aa7 YW |
467 | if (IN_SET(type, TK_M_ATTR, TK_M_PARENTS_ATTR)) { |
468 | assert(value); | |
469 | assert(data); | |
be4bedd1 | 470 | |
25de7aa7 YW |
471 | len = strlen(value); |
472 | if (len > 0 && !isspace(value[len - 1])) | |
473 | remove_trailing_whitespace = true; | |
912541b0 | 474 | |
25de7aa7 YW |
475 | subst_type = rule_get_substitution_type((const char*) data); |
476 | } | |
fae0f8a0 | 477 | |
25de7aa7 YW |
478 | token = new(UdevRuleToken, 1); |
479 | if (!token) | |
480 | return -ENOMEM; | |
fae0f8a0 | 481 | |
25de7aa7 YW |
482 | *token = (UdevRuleToken) { |
483 | .type = type, | |
484 | .op = op, | |
485 | .value = value, | |
486 | .data = data, | |
487 | .match_type = match_type, | |
488 | .attr_subst_type = subst_type, | |
489 | .attr_match_remove_trailing_whitespace = remove_trailing_whitespace, | |
490 | }; | |
fae0f8a0 | 491 | |
25de7aa7 YW |
492 | rule_line_append_token(rule_line, token); |
493 | ||
494 | if (token->type == TK_A_NAME) | |
495 | SET_FLAG(rule_line->type, LINE_HAS_NAME, true); | |
496 | ||
497 | else if (IN_SET(token->type, TK_A_DEVLINK, | |
498 | TK_A_OWNER, TK_A_GROUP, TK_A_MODE, | |
499 | TK_A_OWNER_ID, TK_A_GROUP_ID, TK_A_MODE_ID)) | |
500 | SET_FLAG(rule_line->type, LINE_HAS_DEVLINK, true); | |
501 | ||
502 | else if (token->type >= _TK_A_MIN || | |
9c69cd7e | 503 | IN_SET(token->type, TK_M_PROGRAM, |
25de7aa7 YW |
504 | TK_M_IMPORT_FILE, TK_M_IMPORT_PROGRAM, TK_M_IMPORT_BUILTIN, |
505 | TK_M_IMPORT_DB, TK_M_IMPORT_CMDLINE, TK_M_IMPORT_PARENT)) | |
506 | SET_FLAG(rule_line->type, LINE_UPDATE_SOMETHING, true); | |
fae0f8a0 | 507 | |
912541b0 | 508 | return 0; |
bd0ed2ff KS |
509 | } |
510 | ||
f85cc54c ZJS |
511 | static void check_value_format_and_warn(UdevRules *rules, const char *key, const char *value, bool nonempty) { |
512 | size_t offset; | |
513 | const char *hint; | |
514 | ||
515 | if (nonempty && isempty(value)) | |
516 | log_token_invalid_value(rules, key, value, (size_t) 0, "empty value"); | |
517 | else if (udev_check_format(value, &offset, &hint) < 0) | |
518 | log_token_invalid_value(rules, key, value, offset + 1, hint); | |
519 | } | |
520 | ||
7504610b ZJS |
521 | static int check_attr_format_and_warn(UdevRules *rules, const char *key, const char *value) { |
522 | size_t offset; | |
523 | const char *hint; | |
524 | ||
525 | if (isempty(value)) | |
526 | return log_token_invalid_attr(rules, key); | |
527 | if (udev_check_format(value, &offset, &hint) < 0) | |
528 | log_token_invalid_attr_format(rules, key, value, offset + 1, hint); | |
529 | return 0; | |
530 | } | |
531 | ||
25de7aa7 YW |
532 | static int parse_token(UdevRules *rules, const char *key, char *attr, UdevRuleOperatorType op, char *value) { |
533 | bool is_match = IN_SET(op, OP_MATCH, OP_NOMATCH); | |
534 | UdevRuleLine *rule_line; | |
a7521142 | 535 | int r; |
912541b0 | 536 | |
25de7aa7 YW |
537 | assert(rules); |
538 | assert(rules->current_file); | |
539 | assert(rules->current_file->current_line); | |
540 | assert(key); | |
541 | assert(value); | |
542 | ||
543 | rule_line = rules->current_file->current_line; | |
544 | ||
545 | if (streq(key, "ACTION")) { | |
546 | if (attr) | |
547 | return log_token_invalid_attr(rules, key); | |
548 | if (!is_match) | |
549 | return log_token_invalid_op(rules, key); | |
550 | ||
551 | r = rule_line_add_token(rule_line, TK_M_ACTION, op, value, NULL); | |
552 | } else if (streq(key, "DEVPATH")) { | |
553 | if (attr) | |
554 | return log_token_invalid_attr(rules, key); | |
555 | if (!is_match) | |
556 | return log_token_invalid_op(rules, key); | |
557 | ||
558 | r = rule_line_add_token(rule_line, TK_M_DEVPATH, op, value, NULL); | |
559 | } else if (streq(key, "KERNEL")) { | |
560 | if (attr) | |
561 | return log_token_invalid_attr(rules, key); | |
562 | if (!is_match) | |
563 | return log_token_invalid_op(rules, key); | |
564 | ||
565 | r = rule_line_add_token(rule_line, TK_M_KERNEL, op, value, NULL); | |
566 | } else if (streq(key, "SYMLINK")) { | |
567 | if (attr) | |
568 | return log_token_invalid_attr(rules, key); | |
569 | if (op == OP_REMOVE) | |
570 | return log_token_invalid_op(rules, key); | |
571 | ||
d7aee41d | 572 | if (!is_match) { |
f85cc54c | 573 | check_value_format_and_warn(rules, key, value, false); |
d7aee41d YW |
574 | r = rule_line_add_token(rule_line, TK_A_DEVLINK, op, value, NULL); |
575 | } else | |
576 | r = rule_line_add_token(rule_line, TK_M_DEVLINK, op, value, NULL); | |
25de7aa7 YW |
577 | } else if (streq(key, "NAME")) { |
578 | if (attr) | |
579 | return log_token_invalid_attr(rules, key); | |
580 | if (op == OP_REMOVE) | |
581 | return log_token_invalid_op(rules, key); | |
582 | if (op == OP_ADD) { | |
583 | log_token_warning(rules, "%s key takes '==', '!=', '=', or ':=' operator, assuming '=', but please fix it.", key); | |
584 | op = OP_ASSIGN; | |
585 | } | |
586 | ||
587 | if (!is_match) { | |
588 | if (streq(value, "%k")) | |
589 | return log_token_error_errno(rules, SYNTHETIC_ERRNO(EINVAL), | |
590 | "Ignoring NAME=\"%%k\" is ignored, as it breaks kernel supplied names."); | |
591 | if (isempty(value)) | |
592 | return log_token_error_errno(rules, SYNTHETIC_ERRNO(EINVAL), | |
593 | "Ignoring NAME=\"\", as udev will not delete any device nodes."); | |
f85cc54c | 594 | check_value_format_and_warn(rules, key, value, false); |
d7aee41d | 595 | |
25de7aa7 YW |
596 | r = rule_line_add_token(rule_line, TK_A_NAME, op, value, NULL); |
597 | } else | |
598 | r = rule_line_add_token(rule_line, TK_M_NAME, op, value, NULL); | |
599 | } else if (streq(key, "ENV")) { | |
600 | if (isempty(attr)) | |
601 | return log_token_invalid_attr(rules, key); | |
602 | if (op == OP_REMOVE) | |
603 | return log_token_invalid_op(rules, key); | |
604 | if (op == OP_ASSIGN_FINAL) { | |
605 | log_token_warning(rules, "%s key takes '==', '!=', '=', or '+=' operator, assuming '=', but please fix it.", key); | |
606 | op = OP_ASSIGN; | |
607 | } | |
912541b0 | 608 | |
25de7aa7 YW |
609 | if (!is_match) { |
610 | if (STR_IN_SET(attr, | |
611 | "ACTION", "DEVLINKS", "DEVNAME", "DEVPATH", "DEVTYPE", "DRIVER", | |
612 | "IFINDEX", "MAJOR", "MINOR", "SEQNUM", "SUBSYSTEM", "TAGS")) | |
613 | return log_token_error_errno(rules, SYNTHETIC_ERRNO(EINVAL), | |
614 | "Invalid ENV attribute. '%s' cannot be set.", attr); | |
912541b0 | 615 | |
f85cc54c ZJS |
616 | check_value_format_and_warn(rules, key, value, false); |
617 | ||
25de7aa7 YW |
618 | r = rule_line_add_token(rule_line, TK_A_ENV, op, value, attr); |
619 | } else | |
620 | r = rule_line_add_token(rule_line, TK_M_ENV, op, value, attr); | |
621 | } else if (streq(key, "TAG")) { | |
622 | if (attr) | |
623 | return log_token_invalid_attr(rules, key); | |
624 | if (op == OP_ASSIGN_FINAL) { | |
625 | log_token_warning(rules, "%s key takes '==', '!=', '=', or '+=' operator, assuming '=', but please fix it.", key); | |
626 | op = OP_ASSIGN; | |
912541b0 | 627 | } |
319c6700 | 628 | |
d7aee41d | 629 | if (!is_match) { |
f85cc54c ZJS |
630 | check_value_format_and_warn(rules, key, value, true); |
631 | ||
d7aee41d YW |
632 | r = rule_line_add_token(rule_line, TK_A_TAG, op, value, NULL); |
633 | } else | |
634 | r = rule_line_add_token(rule_line, TK_M_TAG, op, value, NULL); | |
25de7aa7 YW |
635 | } else if (streq(key, "SUBSYSTEM")) { |
636 | if (attr) | |
637 | return log_token_invalid_attr(rules, key); | |
638 | if (!is_match) | |
639 | return log_token_invalid_op(rules, key); | |
640 | ||
641 | if (STR_IN_SET(value, "bus", "class")) | |
642 | log_token_warning(rules, "'%s' must be specified as 'subsystem'; please fix it", value); | |
643 | ||
644 | r = rule_line_add_token(rule_line, TK_M_SUBSYSTEM, op, value, NULL); | |
645 | } else if (streq(key, "DRIVER")) { | |
646 | if (attr) | |
647 | return log_token_invalid_attr(rules, key); | |
648 | if (!is_match) | |
649 | return log_token_invalid_op(rules, key); | |
650 | ||
651 | r = rule_line_add_token(rule_line, TK_M_DRIVER, op, value, NULL); | |
652 | } else if (streq(key, "ATTR")) { | |
7504610b ZJS |
653 | r = check_attr_format_and_warn(rules, key, attr); |
654 | if (r < 0) | |
655 | return r; | |
25de7aa7 YW |
656 | if (op == OP_REMOVE) |
657 | return log_token_invalid_op(rules, key); | |
658 | if (IN_SET(op, OP_ADD, OP_ASSIGN_FINAL)) { | |
659 | log_token_warning(rules, "%s key takes '==', '!=', or '=' operator, assuming '=', but please fix it.", key); | |
660 | op = OP_ASSIGN; | |
661 | } | |
912541b0 | 662 | |
d7aee41d | 663 | if (!is_match) { |
f85cc54c | 664 | check_value_format_and_warn(rules, key, value, false); |
d7aee41d YW |
665 | r = rule_line_add_token(rule_line, TK_A_ATTR, op, value, attr); |
666 | } else | |
667 | r = rule_line_add_token(rule_line, TK_M_ATTR, op, value, attr); | |
25de7aa7 | 668 | } else if (streq(key, "SYSCTL")) { |
7504610b ZJS |
669 | r = check_attr_format_and_warn(rules, key, attr); |
670 | if (r < 0) | |
671 | return r; | |
25de7aa7 YW |
672 | if (op == OP_REMOVE) |
673 | return log_token_invalid_op(rules, key); | |
674 | if (IN_SET(op, OP_ADD, OP_ASSIGN_FINAL)) { | |
675 | log_token_warning(rules, "%s key takes '==', '!=', or '=' operator, assuming '=', but please fix it.", key); | |
676 | op = OP_ASSIGN; | |
677 | } | |
3b64e4d4 | 678 | |
d7aee41d | 679 | if (!is_match) { |
f85cc54c | 680 | check_value_format_and_warn(rules, key, value, false); |
d7aee41d YW |
681 | r = rule_line_add_token(rule_line, TK_A_SYSCTL, op, value, attr); |
682 | } else | |
683 | r = rule_line_add_token(rule_line, TK_M_SYSCTL, op, value, attr); | |
25de7aa7 YW |
684 | } else if (streq(key, "KERNELS")) { |
685 | if (attr) | |
686 | return log_token_invalid_attr(rules, key); | |
687 | if (!is_match) | |
688 | return log_token_invalid_op(rules, key); | |
689 | ||
690 | r = rule_line_add_token(rule_line, TK_M_PARENTS_KERNEL, op, value, NULL); | |
691 | } else if (streq(key, "SUBSYSTEMS")) { | |
692 | if (attr) | |
693 | return log_token_invalid_attr(rules, key); | |
694 | if (!is_match) | |
695 | return log_token_invalid_op(rules, key); | |
696 | ||
697 | r = rule_line_add_token(rule_line, TK_M_PARENTS_SUBSYSTEM, op, value, NULL); | |
698 | } else if (streq(key, "DRIVERS")) { | |
699 | if (attr) | |
700 | return log_token_invalid_attr(rules, key); | |
701 | if (!is_match) | |
702 | return log_token_invalid_op(rules, key); | |
703 | ||
704 | r = rule_line_add_token(rule_line, TK_M_PARENTS_DRIVER, op, value, NULL); | |
705 | } else if (streq(key, "ATTRS")) { | |
7504610b ZJS |
706 | r = check_attr_format_and_warn(rules, key, attr); |
707 | if (r < 0) | |
708 | return r; | |
25de7aa7 YW |
709 | if (!is_match) |
710 | return log_token_invalid_op(rules, key); | |
711 | ||
712 | if (startswith(attr, "device/")) | |
713 | log_token_warning(rules, "'device' link may not be available in future kernels; please fix it."); | |
714 | if (strstr(attr, "../")) | |
715 | log_token_warning(rules, "Direct reference to parent sysfs directory, may break in future kernels; please fix it."); | |
716 | ||
717 | r = rule_line_add_token(rule_line, TK_M_PARENTS_ATTR, op, value, attr); | |
718 | } else if (streq(key, "TAGS")) { | |
719 | if (attr) | |
720 | return log_token_invalid_attr(rules, key); | |
721 | if (!is_match) | |
722 | return log_token_invalid_op(rules, key); | |
723 | ||
724 | r = rule_line_add_token(rule_line, TK_M_PARENTS_TAG, op, value, NULL); | |
725 | } else if (streq(key, "TEST")) { | |
726 | mode_t mode = MODE_INVALID; | |
727 | ||
728 | if (!isempty(attr)) { | |
729 | r = parse_mode(attr, &mode); | |
730 | if (r < 0) | |
731 | return log_token_error_errno(rules, r, "Failed to parse mode '%s': %m", attr); | |
732 | } | |
f85cc54c | 733 | check_value_format_and_warn(rules, key, value, true); |
25de7aa7 YW |
734 | if (!is_match) |
735 | return log_token_invalid_op(rules, key); | |
736 | ||
737 | r = rule_line_add_token(rule_line, TK_M_TEST, op, value, MODE_TO_PTR(mode)); | |
738 | } else if (streq(key, "PROGRAM")) { | |
739 | if (attr) | |
740 | return log_token_invalid_attr(rules, key); | |
f85cc54c | 741 | check_value_format_and_warn(rules, key, value, true); |
25de7aa7 YW |
742 | if (op == OP_REMOVE) |
743 | return log_token_invalid_op(rules, key); | |
744 | if (!is_match) { | |
745 | if (op == OP_ASSIGN) | |
746 | log_token_debug(rules, "Operator '=' is specified to %s key, assuming '=='.", key); | |
747 | else | |
748 | log_token_warning(rules, "%s key takes '==' or '!=' operator, assuming '==', but please fix it.", key); | |
749 | op = OP_MATCH; | |
750 | } | |
912541b0 | 751 | |
25de7aa7 YW |
752 | r = rule_line_add_token(rule_line, TK_M_PROGRAM, op, value, NULL); |
753 | } else if (streq(key, "IMPORT")) { | |
754 | if (isempty(attr)) | |
755 | return log_token_invalid_attr(rules, key); | |
f85cc54c | 756 | check_value_format_and_warn(rules, key, value, true); |
25de7aa7 YW |
757 | if (op == OP_REMOVE) |
758 | return log_token_invalid_op(rules, key); | |
759 | if (!is_match) { | |
760 | if (op == OP_ASSIGN) | |
761 | log_token_debug(rules, "Operator '=' is specified to %s key, assuming '=='.", key); | |
762 | else | |
763 | log_token_warning(rules, "%s key takes '==' or '!=' operator, assuming '==', but please fix it.", key); | |
764 | op = OP_MATCH; | |
765 | } | |
e2ecb34f | 766 | |
25de7aa7 YW |
767 | if (streq(attr, "file")) |
768 | r = rule_line_add_token(rule_line, TK_M_IMPORT_FILE, op, value, NULL); | |
769 | else if (streq(attr, "program")) { | |
770 | UdevBuiltinCommand cmd; | |
f4850a1d | 771 | |
25de7aa7 YW |
772 | cmd = udev_builtin_lookup(value); |
773 | if (cmd >= 0) { | |
774 | log_token_debug(rules,"Found builtin command '%s' for %s, replacing attribute", value, key); | |
775 | r = rule_line_add_token(rule_line, TK_M_IMPORT_BUILTIN, op, value, UDEV_BUILTIN_CMD_TO_PTR(cmd)); | |
776 | } else | |
777 | r = rule_line_add_token(rule_line, TK_M_IMPORT_PROGRAM, op, value, NULL); | |
778 | } else if (streq(attr, "builtin")) { | |
779 | UdevBuiltinCommand cmd; | |
780 | ||
781 | cmd = udev_builtin_lookup(value); | |
782 | if (cmd < 0) | |
783 | return log_token_error_errno(rules, SYNTHETIC_ERRNO(EINVAL), | |
784 | "Unknown builtin command: %s", value); | |
785 | r = rule_line_add_token(rule_line, TK_M_IMPORT_BUILTIN, op, value, UDEV_BUILTIN_CMD_TO_PTR(cmd)); | |
786 | } else if (streq(attr, "db")) | |
787 | r = rule_line_add_token(rule_line, TK_M_IMPORT_DB, op, value, NULL); | |
788 | else if (streq(attr, "cmdline")) | |
789 | r = rule_line_add_token(rule_line, TK_M_IMPORT_CMDLINE, op, value, NULL); | |
790 | else if (streq(attr, "parent")) | |
791 | r = rule_line_add_token(rule_line, TK_M_IMPORT_PARENT, op, value, NULL); | |
792 | else | |
793 | return log_token_invalid_attr(rules, key); | |
794 | } else if (streq(key, "RESULT")) { | |
795 | if (attr) | |
796 | return log_token_invalid_attr(rules, key); | |
797 | if (!is_match) | |
798 | return log_token_invalid_op(rules, key); | |
799 | ||
800 | r = rule_line_add_token(rule_line, TK_M_RESULT, op, value, NULL); | |
801 | } else if (streq(key, "OPTIONS")) { | |
802 | char *tmp; | |
803 | ||
804 | if (attr) | |
805 | return log_token_invalid_attr(rules, key); | |
806 | if (is_match || op == OP_REMOVE) | |
807 | return log_token_invalid_op(rules, key); | |
808 | if (op == OP_ADD) { | |
809 | log_token_debug(rules, "Operator '+=' is specified to %s key, assuming '='.", key); | |
810 | op = OP_ASSIGN; | |
811 | } | |
f4850a1d | 812 | |
25de7aa7 YW |
813 | if (streq(value, "string_escape=none")) |
814 | r = rule_line_add_token(rule_line, TK_A_OPTIONS_STRING_ESCAPE_NONE, op, NULL, NULL); | |
815 | else if (streq(value, "string_escape=replace")) | |
816 | r = rule_line_add_token(rule_line, TK_A_OPTIONS_STRING_ESCAPE_REPLACE, op, NULL, NULL); | |
817 | else if (streq(value, "db_persist")) | |
818 | r = rule_line_add_token(rule_line, TK_A_OPTIONS_DB_PERSIST, op, NULL, NULL); | |
819 | else if (streq(value, "watch")) | |
820 | r = rule_line_add_token(rule_line, TK_A_OPTIONS_INOTIFY_WATCH, op, NULL, INT_TO_PTR(1)); | |
821 | else if (streq(value, "nowatch")) | |
822 | r = rule_line_add_token(rule_line, TK_A_OPTIONS_INOTIFY_WATCH, op, NULL, INT_TO_PTR(0)); | |
823 | else if ((tmp = startswith(value, "static_node="))) | |
824 | r = rule_line_add_token(rule_line, TK_A_OPTIONS_STATIC_NODE, op, tmp, NULL); | |
825 | else if ((tmp = startswith(value, "link_priority="))) { | |
826 | int prio; | |
827 | ||
828 | r = safe_atoi(tmp, &prio); | |
829 | if (r < 0) | |
830 | return log_token_error_errno(rules, r, "Failed to parse link priority '%s': %m", tmp); | |
831 | r = rule_line_add_token(rule_line, TK_A_OPTIONS_DEVLINK_PRIORITY, op, NULL, INT_TO_PTR(prio)); | |
832 | } else { | |
833 | log_token_warning(rules, "Invalid value for OPTIONS key, ignoring: '%s'", value); | |
834 | return 0; | |
835 | } | |
836 | } else if (streq(key, "OWNER")) { | |
837 | uid_t uid; | |
f4850a1d | 838 | |
25de7aa7 YW |
839 | if (attr) |
840 | return log_token_invalid_attr(rules, key); | |
841 | if (is_match || op == OP_REMOVE) | |
842 | return log_token_invalid_op(rules, key); | |
843 | if (op == OP_ADD) { | |
844 | log_token_warning(rules, "%s key takes '=' or ':=' operator, assuming '=', but please fix it.", key); | |
845 | op = OP_ASSIGN; | |
846 | } | |
f4850a1d | 847 | |
25de7aa7 YW |
848 | if (parse_uid(value, &uid) >= 0) |
849 | r = rule_line_add_token(rule_line, TK_A_OWNER_ID, op, NULL, UID_TO_PTR(uid)); | |
850 | else if (rules->resolve_name_timing == RESOLVE_NAME_EARLY && | |
851 | rule_get_substitution_type(value) == SUBST_TYPE_PLAIN) { | |
852 | r = rule_resolve_user(rules, value, &uid); | |
853 | if (r < 0) | |
854 | return log_token_error_errno(rules, r, "Failed to resolve user name '%s': %m", value); | |
855 | ||
856 | r = rule_line_add_token(rule_line, TK_A_OWNER_ID, op, NULL, UID_TO_PTR(uid)); | |
d7aee41d | 857 | } else if (rules->resolve_name_timing != RESOLVE_NAME_NEVER) { |
f85cc54c | 858 | check_value_format_and_warn(rules, key, value, true); |
25de7aa7 | 859 | r = rule_line_add_token(rule_line, TK_A_OWNER, op, value, NULL); |
d7aee41d | 860 | } else { |
25de7aa7 YW |
861 | log_token_debug(rules, "Resolving user name is disabled, ignoring %s=%s", key, value); |
862 | return 0; | |
863 | } | |
864 | } else if (streq(key, "GROUP")) { | |
865 | gid_t gid; | |
866 | ||
867 | if (attr) | |
868 | return log_token_invalid_attr(rules, key); | |
869 | if (is_match || op == OP_REMOVE) | |
870 | return log_token_invalid_op(rules, key); | |
871 | if (op == OP_ADD) { | |
872 | log_token_warning(rules, "%s key takes '=' or ':=' operator, assuming '=', but please fix it.", key); | |
873 | op = OP_ASSIGN; | |
874 | } | |
875 | ||
876 | if (parse_gid(value, &gid) >= 0) | |
877 | r = rule_line_add_token(rule_line, TK_A_GROUP_ID, op, NULL, GID_TO_PTR(gid)); | |
878 | else if (rules->resolve_name_timing == RESOLVE_NAME_EARLY && | |
879 | rule_get_substitution_type(value) == SUBST_TYPE_PLAIN) { | |
880 | r = rule_resolve_group(rules, value, &gid); | |
881 | if (r < 0) | |
882 | return log_token_error_errno(rules, r, "Failed to resolve group name '%s': %m", value); | |
883 | ||
884 | r = rule_line_add_token(rule_line, TK_A_GROUP_ID, op, NULL, GID_TO_PTR(gid)); | |
d7aee41d | 885 | } else if (rules->resolve_name_timing != RESOLVE_NAME_NEVER) { |
f85cc54c | 886 | check_value_format_and_warn(rules, key, value, true); |
25de7aa7 | 887 | r = rule_line_add_token(rule_line, TK_A_GROUP, op, value, NULL); |
d7aee41d | 888 | } else { |
25de7aa7 YW |
889 | log_token_debug(rules, "Resolving group name is disabled, ignoring %s=%s", key, value); |
890 | return 0; | |
891 | } | |
892 | } else if (streq(key, "MODE")) { | |
893 | mode_t mode; | |
894 | ||
895 | if (attr) | |
896 | return log_token_invalid_attr(rules, key); | |
897 | if (is_match || op == OP_REMOVE) | |
898 | return log_token_invalid_op(rules, key); | |
899 | if (op == OP_ADD) { | |
900 | log_token_warning(rules, "%s key takes '=' or ':=' operator, assuming '=', but please fix it.", key); | |
901 | op = OP_ASSIGN; | |
902 | } | |
903 | ||
904 | if (parse_mode(value, &mode) >= 0) | |
905 | r = rule_line_add_token(rule_line, TK_A_MODE_ID, op, NULL, MODE_TO_PTR(mode)); | |
d7aee41d | 906 | else { |
f85cc54c | 907 | check_value_format_and_warn(rules, key, value, true); |
25de7aa7 | 908 | r = rule_line_add_token(rule_line, TK_A_MODE, op, value, NULL); |
d7aee41d | 909 | } |
25de7aa7 YW |
910 | } else if (streq(key, "SECLABEL")) { |
911 | if (isempty(attr)) | |
912 | return log_token_invalid_attr(rules, key); | |
f85cc54c | 913 | check_value_format_and_warn(rules, key, value, true); |
25de7aa7 YW |
914 | if (is_match || op == OP_REMOVE) |
915 | return log_token_invalid_op(rules, key); | |
916 | if (op == OP_ASSIGN_FINAL) { | |
917 | log_token_warning(rules, "%s key takes '=' or '+=' operator, assuming '=', but please fix it.", key); | |
918 | op = OP_ASSIGN; | |
919 | } | |
920 | ||
921 | r = rule_line_add_token(rule_line, TK_A_SECLABEL, op, value, NULL); | |
922 | } else if (streq(key, "RUN")) { | |
923 | if (is_match || op == OP_REMOVE) | |
924 | return log_token_invalid_op(rules, key); | |
f85cc54c | 925 | check_value_format_and_warn(rules, key, value, true); |
25de7aa7 YW |
926 | if (!attr || streq(attr, "program")) |
927 | r = rule_line_add_token(rule_line, TK_A_RUN_PROGRAM, op, value, NULL); | |
928 | else if (streq(attr, "builtin")) { | |
929 | UdevBuiltinCommand cmd; | |
930 | ||
931 | cmd = udev_builtin_lookup(value); | |
932 | if (cmd < 0) | |
933 | return log_token_error_errno(rules, SYNTHETIC_ERRNO(EINVAL), | |
934 | "Unknown builtin command '%s', ignoring", value); | |
935 | r = rule_line_add_token(rule_line, TK_A_RUN_BUILTIN, op, value, UDEV_BUILTIN_CMD_TO_PTR(cmd)); | |
936 | } else | |
937 | return log_token_invalid_attr(rules, key); | |
938 | } else if (streq(key, "GOTO")) { | |
939 | if (attr) | |
940 | return log_token_invalid_attr(rules, key); | |
941 | if (op != OP_ASSIGN) | |
942 | return log_token_invalid_op(rules, key); | |
943 | if (FLAGS_SET(rule_line->type, LINE_HAS_GOTO)) { | |
944 | log_token_warning(rules, "Contains multiple GOTO key, ignoring GOTO=\"%s\".", value); | |
945 | return 0; | |
912541b0 | 946 | } |
25de7aa7 YW |
947 | |
948 | rule_line->goto_label = value; | |
949 | SET_FLAG(rule_line->type, LINE_HAS_GOTO, true); | |
950 | return 1; | |
951 | } else if (streq(key, "LABEL")) { | |
952 | if (attr) | |
953 | return log_token_invalid_attr(rules, key); | |
954 | if (op != OP_ASSIGN) | |
955 | return log_token_invalid_op(rules, key); | |
956 | ||
957 | rule_line->label = value; | |
958 | SET_FLAG(rule_line->type, LINE_HAS_LABEL, true); | |
959 | return 1; | |
960 | } else | |
961 | return log_token_error_errno(rules, SYNTHETIC_ERRNO(EINVAL), "Invalid key '%s'", key); | |
962 | if (r < 0) | |
963 | return log_oom(); | |
964 | ||
965 | return 1; | |
0ea5e96e KS |
966 | } |
967 | ||
25de7aa7 YW |
968 | static UdevRuleOperatorType parse_operator(const char *op) { |
969 | assert(op); | |
970 | ||
971 | if (startswith(op, "==")) | |
972 | return OP_MATCH; | |
973 | if (startswith(op, "!=")) | |
974 | return OP_NOMATCH; | |
975 | if (startswith(op, "+=")) | |
976 | return OP_ADD; | |
977 | if (startswith(op, "-=")) | |
978 | return OP_REMOVE; | |
979 | if (startswith(op, "=")) | |
980 | return OP_ASSIGN; | |
981 | if (startswith(op, ":=")) | |
982 | return OP_ASSIGN_FINAL; | |
983 | ||
984 | return _OP_TYPE_INVALID; | |
985 | } | |
912541b0 | 986 | |
25de7aa7 YW |
987 | static int parse_line(char **line, char **ret_key, char **ret_attr, UdevRuleOperatorType *ret_op, char **ret_value) { |
988 | char *key_begin, *key_end, *attr, *tmp, *value, *i, *j; | |
989 | UdevRuleOperatorType op; | |
912541b0 | 990 | |
25de7aa7 YW |
991 | assert(line); |
992 | assert(*line); | |
993 | assert(ret_key); | |
994 | assert(ret_op); | |
995 | assert(ret_value); | |
912541b0 | 996 | |
25de7aa7 | 997 | key_begin = skip_leading_chars(*line, WHITESPACE ","); |
912541b0 | 998 | |
25de7aa7 YW |
999 | if (isempty(key_begin)) |
1000 | return 0; | |
1001 | ||
1002 | for (key_end = key_begin; ; key_end++) { | |
1003 | if (key_end[0] == '\0') | |
704dbfb2 | 1004 | return -EINVAL; |
25de7aa7 | 1005 | if (strchr(WHITESPACE "={", key_end[0])) |
912541b0 | 1006 | break; |
25de7aa7 | 1007 | if (strchr("+-!:", key_end[0]) && key_end[1] == '=') |
912541b0 | 1008 | break; |
25de7aa7 YW |
1009 | } |
1010 | if (key_end[0] == '{') { | |
1011 | attr = key_end + 1; | |
1012 | tmp = strchr(attr, '}'); | |
1013 | if (!tmp) | |
1014 | return -EINVAL; | |
1015 | *tmp++ = '\0'; | |
1016 | } else { | |
1017 | attr = NULL; | |
1018 | tmp = key_end; | |
912541b0 KS |
1019 | } |
1020 | ||
25de7aa7 YW |
1021 | tmp = skip_leading_chars(tmp, NULL); |
1022 | op = parse_operator(tmp); | |
1023 | if (op < 0) | |
704dbfb2 | 1024 | return -EINVAL; |
912541b0 | 1025 | |
25de7aa7 | 1026 | key_end[0] = '\0'; |
912541b0 | 1027 | |
25de7aa7 YW |
1028 | tmp += op == OP_ASSIGN ? 1 : 2; |
1029 | value = skip_leading_chars(tmp, NULL); | |
912541b0 | 1030 | |
25de7aa7 YW |
1031 | /* value must be double quotated */ |
1032 | if (value[0] != '"') | |
704dbfb2 | 1033 | return -EINVAL; |
25de7aa7 | 1034 | value++; |
7e760b79 | 1035 | |
25de7aa7 YW |
1036 | /* unescape double quotation '\"' -> '"' */ |
1037 | for (i = j = value; ; i++, j++) { | |
1038 | if (*i == '"') | |
7e760b79 | 1039 | break; |
25de7aa7 | 1040 | if (*i == '\0') |
704dbfb2 | 1041 | return -EINVAL; |
25de7aa7 YW |
1042 | if (i[0] == '\\' && i[1] == '"') |
1043 | i++; | |
1044 | *j = *i; | |
1045 | } | |
1046 | j[0] = '\0'; | |
1047 | ||
1048 | *line = i+1; | |
1049 | *ret_key = key_begin; | |
1050 | *ret_attr = attr; | |
1051 | *ret_op = op; | |
1052 | *ret_value = value; | |
1053 | return 1; | |
1054 | } | |
7e760b79 | 1055 | |
25de7aa7 YW |
1056 | static void sort_tokens(UdevRuleLine *rule_line) { |
1057 | UdevRuleToken *head_old; | |
7e760b79 | 1058 | |
25de7aa7 | 1059 | assert(rule_line); |
912541b0 | 1060 | |
25de7aa7 YW |
1061 | head_old = TAKE_PTR(rule_line->tokens); |
1062 | rule_line->current_token = NULL; | |
95776dc6 | 1063 | |
25de7aa7 YW |
1064 | while (!LIST_IS_EMPTY(head_old)) { |
1065 | UdevRuleToken *t, *min_token = NULL; | |
1066 | ||
1067 | LIST_FOREACH(tokens, t, head_old) | |
1068 | if (!min_token || min_token->type > t->type) | |
1069 | min_token = t; | |
1070 | ||
1071 | LIST_REMOVE(tokens, head_old, min_token); | |
1072 | rule_line_append_token(rule_line, min_token); | |
912541b0 | 1073 | } |
6880b25d | 1074 | } |
95776dc6 | 1075 | |
25de7aa7 YW |
1076 | static int rule_add_line(UdevRules *rules, const char *line_str, unsigned line_nr) { |
1077 | _cleanup_(udev_rule_line_freep) UdevRuleLine *rule_line = NULL; | |
1078 | _cleanup_free_ char *line = NULL; | |
1079 | UdevRuleFile *rule_file; | |
1080 | char *p; | |
1081 | int r; | |
912541b0 | 1082 | |
25de7aa7 YW |
1083 | assert(rules); |
1084 | assert(rules->current_file); | |
1085 | assert(line_str); | |
6e2efb6c | 1086 | |
25de7aa7 | 1087 | rule_file = rules->current_file; |
912541b0 | 1088 | |
25de7aa7 YW |
1089 | if (isempty(line_str)) |
1090 | return 0; | |
912541b0 | 1091 | |
25de7aa7 YW |
1092 | line = strdup(line_str); |
1093 | if (!line) | |
1094 | return log_oom(); | |
67e4b385 | 1095 | |
25de7aa7 YW |
1096 | rule_line = new(UdevRuleLine, 1); |
1097 | if (!rule_line) | |
1098 | return log_oom(); | |
912541b0 | 1099 | |
25de7aa7 YW |
1100 | *rule_line = (UdevRuleLine) { |
1101 | .line = TAKE_PTR(line), | |
1102 | .line_number = line_nr, | |
1103 | .rule_file = rule_file, | |
1104 | }; | |
912541b0 | 1105 | |
25de7aa7 YW |
1106 | if (rule_file->current_line) |
1107 | LIST_APPEND(rule_lines, rule_file->current_line, rule_line); | |
1108 | else | |
1109 | LIST_APPEND(rule_lines, rule_file->rule_lines, rule_line); | |
e57e7bc1 | 1110 | |
25de7aa7 | 1111 | rule_file->current_line = rule_line; |
912541b0 | 1112 | |
25de7aa7 YW |
1113 | for (p = rule_line->line; !isempty(p); ) { |
1114 | char *key, *attr, *value; | |
1115 | UdevRuleOperatorType op; | |
912541b0 | 1116 | |
25de7aa7 YW |
1117 | r = parse_line(&p, &key, &attr, &op, &value); |
1118 | if (r < 0) | |
1119 | return log_token_error_errno(rules, r, "Invalid key/value pair, ignoring."); | |
1120 | if (r == 0) | |
1121 | break; | |
912541b0 | 1122 | |
25de7aa7 | 1123 | r = parse_token(rules, key, attr, op, value); |
ef660d07 YW |
1124 | if (r < 0) |
1125 | return r; | |
25de7aa7 | 1126 | } |
912541b0 | 1127 | |
25de7aa7 YW |
1128 | if (rule_line->type == 0) { |
1129 | log_token_warning(rules, "The line takes no effect, ignoring."); | |
1130 | return 0; | |
912541b0 | 1131 | } |
25de7aa7 YW |
1132 | |
1133 | sort_tokens(rule_line); | |
1134 | TAKE_PTR(rule_line); | |
912541b0 | 1135 | return 0; |
724257d9 GKH |
1136 | } |
1137 | ||
25de7aa7 YW |
1138 | static void rule_resolve_goto(UdevRuleFile *rule_file) { |
1139 | UdevRuleLine *line, *line_next, *i; | |
912541b0 | 1140 | |
25de7aa7 | 1141 | assert(rule_file); |
912541b0 | 1142 | |
25de7aa7 YW |
1143 | /* link GOTOs to LABEL rules in this file to be able to fast-forward */ |
1144 | LIST_FOREACH_SAFE(rule_lines, line, line_next, rule_file->rule_lines) { | |
1145 | if (!FLAGS_SET(line->type, LINE_HAS_GOTO)) | |
1146 | continue; | |
912541b0 | 1147 | |
25de7aa7 YW |
1148 | LIST_FOREACH_AFTER(rule_lines, i, line) |
1149 | if (streq_ptr(i->label, line->goto_label)) { | |
1150 | line->goto_line = i; | |
1151 | break; | |
912541b0 KS |
1152 | } |
1153 | ||
25de7aa7 YW |
1154 | if (!line->goto_line) { |
1155 | log_error("%s:%u: GOTO=\"%s\" has no matching label, ignoring", | |
1156 | rule_file->filename, line->line_number, line->goto_label); | |
912541b0 | 1157 | |
25de7aa7 YW |
1158 | SET_FLAG(line->type, LINE_HAS_GOTO, false); |
1159 | line->goto_label = NULL; | |
912541b0 | 1160 | |
25de7aa7 YW |
1161 | if ((line->type & ~LINE_HAS_LABEL) == 0) { |
1162 | log_notice("%s:%u: The line takes no effect any more, dropping", | |
1163 | rule_file->filename, line->line_number); | |
1164 | if (line->type == LINE_HAS_LABEL) | |
1165 | udev_rule_line_clear_tokens(line); | |
1166 | else | |
1167 | udev_rule_line_free(line); | |
912541b0 | 1168 | } |
25de7aa7 | 1169 | } |
912541b0 | 1170 | } |
c7521974 KS |
1171 | } |
1172 | ||
9a07157d | 1173 | static int parse_file(UdevRules *rules, const char *filename) { |
25de7aa7 | 1174 | _cleanup_free_ char *continuation = NULL, *name = NULL; |
6c8aaf0c | 1175 | _cleanup_fclose_ FILE *f = NULL; |
25de7aa7 | 1176 | UdevRuleFile *rule_file; |
f10aa08e | 1177 | bool ignore_line = false; |
25de7aa7 YW |
1178 | unsigned line_nr = 0; |
1179 | int r; | |
912541b0 | 1180 | |
ed88bcfb ZJS |
1181 | f = fopen(filename, "re"); |
1182 | if (!f) { | |
1183 | if (errno == ENOENT) | |
1184 | return 0; | |
fae0f8a0 LP |
1185 | |
1186 | return -errno; | |
775f8b3c | 1187 | } |
912541b0 | 1188 | |
1f57abb3 LP |
1189 | (void) fd_warn_permissions(filename, fileno(f)); |
1190 | ||
ed88bcfb ZJS |
1191 | if (null_or_empty_fd(fileno(f))) { |
1192 | log_debug("Skipping empty file: %s", filename); | |
1193 | return 0; | |
25de7aa7 | 1194 | } |
912541b0 | 1195 | |
25de7aa7 YW |
1196 | log_debug("Reading rules file: %s", filename); |
1197 | ||
1198 | name = strdup(filename); | |
1199 | if (!name) | |
1200 | return log_oom(); | |
1201 | ||
1202 | rule_file = new(UdevRuleFile, 1); | |
1203 | if (!rule_file) | |
1204 | return log_oom(); | |
1205 | ||
1206 | *rule_file = (UdevRuleFile) { | |
1207 | .filename = TAKE_PTR(name), | |
1208 | }; | |
1209 | ||
1210 | if (rules->current_file) | |
1211 | LIST_APPEND(rule_files, rules->current_file, rule_file); | |
1212 | else | |
1213 | LIST_APPEND(rule_files, rules->rule_files, rule_file); | |
1214 | ||
1215 | rules->current_file = rule_file; | |
912541b0 | 1216 | |
f10aa08e YW |
1217 | for (;;) { |
1218 | _cleanup_free_ char *buf = NULL; | |
912541b0 | 1219 | size_t len; |
f10aa08e YW |
1220 | char *line; |
1221 | ||
1222 | r = read_line(f, UTIL_LINE_SIZE, &buf); | |
1223 | if (r < 0) | |
1224 | return r; | |
1225 | if (r == 0) | |
1226 | break; | |
912541b0 | 1227 | |
912541b0 | 1228 | line_nr++; |
25de7aa7 | 1229 | line = skip_leading_chars(buf, NULL); |
912541b0 | 1230 | |
f10aa08e | 1231 | if (line[0] == '#') |
912541b0 KS |
1232 | continue; |
1233 | ||
1234 | len = strlen(line); | |
912541b0 | 1235 | |
f10aa08e YW |
1236 | if (continuation && !ignore_line) { |
1237 | if (strlen(continuation) + len >= UTIL_LINE_SIZE) | |
1238 | ignore_line = true; | |
1239 | ||
1240 | if (!strextend(&continuation, line, NULL)) | |
1241 | return log_oom(); | |
1242 | ||
1243 | if (!ignore_line) { | |
1244 | line = continuation; | |
1245 | len = strlen(line); | |
1246 | } | |
912541b0 KS |
1247 | } |
1248 | ||
e8b2737f | 1249 | if (len > 0 && line[len - 1] == '\\') { |
f10aa08e YW |
1250 | if (ignore_line) |
1251 | continue; | |
1252 | ||
1253 | line[len - 1] = '\0'; | |
1254 | if (!continuation) { | |
1255 | continuation = strdup(line); | |
1256 | if (!continuation) | |
1257 | return log_oom(); | |
1258 | } | |
1259 | ||
912541b0 KS |
1260 | continue; |
1261 | } | |
f10aa08e YW |
1262 | |
1263 | if (ignore_line) | |
25de7aa7 | 1264 | log_error("%s:%u: Line is too long, ignored", filename, line_nr); |
e8b2737f | 1265 | else if (len > 0) |
25de7aa7 | 1266 | (void) rule_add_line(rules, line, line_nr); |
f10aa08e YW |
1267 | |
1268 | continuation = mfree(continuation); | |
1269 | ignore_line = false; | |
912541b0 | 1270 | } |
912541b0 | 1271 | |
25de7aa7 | 1272 | rule_resolve_goto(rule_file); |
912541b0 | 1273 | return 0; |
c7521974 KS |
1274 | } |
1275 | ||
9a07157d ZJS |
1276 | int udev_rules_new(UdevRules **ret_rules, ResolveNameTiming resolve_name_timing) { |
1277 | _cleanup_(udev_rules_freep) UdevRules *rules = NULL; | |
1d791281 ZJS |
1278 | _cleanup_strv_free_ char **files = NULL; |
1279 | char **f; | |
775f8b3c | 1280 | int r; |
912541b0 | 1281 | |
c4d44cba YW |
1282 | assert(resolve_name_timing >= 0 && resolve_name_timing < _RESOLVE_NAME_TIMING_MAX); |
1283 | ||
9a07157d | 1284 | rules = new(UdevRules, 1); |
1017d66b | 1285 | if (!rules) |
1d791281 | 1286 | return -ENOMEM; |
1017d66b | 1287 | |
9a07157d | 1288 | *rules = (UdevRules) { |
c4d44cba | 1289 | .resolve_name_timing = resolve_name_timing, |
1017d66b | 1290 | }; |
912541b0 | 1291 | |
25de7aa7 | 1292 | (void) udev_rules_check_timestamp(rules); |
3b8c1cb0 | 1293 | |
116b91e8 | 1294 | r = conf_files_list_strv(&files, ".rules", NULL, 0, RULES_DIRS); |
1d791281 ZJS |
1295 | if (r < 0) |
1296 | return log_error_errno(r, "Failed to enumerate rules files: %m"); | |
912541b0 | 1297 | |
775f8b3c | 1298 | STRV_FOREACH(f, files) |
25de7aa7 | 1299 | (void) parse_file(rules, *f); |
912541b0 | 1300 | |
1d791281 ZJS |
1301 | *ret_rules = TAKE_PTR(rules); |
1302 | return 0; | |
c7521974 KS |
1303 | } |
1304 | ||
9a07157d | 1305 | bool udev_rules_check_timestamp(UdevRules *rules) { |
5c11fbe3 KS |
1306 | if (!rules) |
1307 | return false; | |
1308 | ||
116b91e8 | 1309 | return paths_check_timestamp(RULES_DIRS, &rules->dirs_ts_usec, true); |
6ada823a KS |
1310 | } |
1311 | ||
25de7aa7 YW |
1312 | static bool token_match_string(UdevRuleToken *token, const char *str) { |
1313 | const char *i, *value; | |
912541b0 KS |
1314 | bool match = false; |
1315 | ||
25de7aa7 YW |
1316 | assert(token); |
1317 | assert(token->value); | |
1318 | assert(token->type < _TK_M_MAX); | |
912541b0 | 1319 | |
25de7aa7 YW |
1320 | str = strempty(str); |
1321 | value = token->value; | |
1322 | ||
1323 | switch (token->match_type) { | |
1324 | case MATCH_TYPE_EMPTY: | |
1325 | match = isempty(str); | |
912541b0 | 1326 | break; |
25de7aa7 YW |
1327 | case MATCH_TYPE_SUBSYSTEM: |
1328 | value = "subsystem\0class\0bus\0"; | |
1329 | _fallthrough_; | |
1330 | case MATCH_TYPE_PLAIN: | |
1331 | NULSTR_FOREACH(i, value) | |
1332 | if (streq(i, str)) { | |
1333 | match = true; | |
1334 | break; | |
912541b0 | 1335 | } |
25de7aa7 YW |
1336 | break; |
1337 | case MATCH_TYPE_GLOB: | |
1338 | NULSTR_FOREACH(i, value) | |
1339 | if ((fnmatch(i, str, 0) == 0)) { | |
1340 | match = true; | |
1341 | break; | |
912541b0 | 1342 | } |
912541b0 | 1343 | break; |
25de7aa7 YW |
1344 | default: |
1345 | assert_not_reached("Invalid match type"); | |
912541b0 KS |
1346 | } |
1347 | ||
25de7aa7 | 1348 | return token->op == (match ? OP_MATCH : OP_NOMATCH); |
6880b25d KS |
1349 | } |
1350 | ||
25de7aa7 | 1351 | static bool token_match_attr(UdevRuleToken *token, sd_device *dev, UdevEvent *event) { |
5ba7e798 YW |
1352 | char nbuf[UTIL_NAME_SIZE], vbuf[UTIL_NAME_SIZE]; |
1353 | const char *name, *value; | |
912541b0 | 1354 | |
25de7aa7 YW |
1355 | assert(token); |
1356 | assert(dev); | |
1357 | assert(event); | |
1358 | ||
1359 | name = (const char*) token->data; | |
1360 | ||
1361 | switch (token->attr_subst_type) { | |
1362 | case SUBST_TYPE_FORMAT: | |
1363 | (void) udev_event_apply_format(event, name, nbuf, sizeof(nbuf), false); | |
912541b0 | 1364 | name = nbuf; |
4831981d | 1365 | _fallthrough_; |
25de7aa7 | 1366 | case SUBST_TYPE_PLAIN: |
5ba7e798 | 1367 | if (sd_device_get_sysattr_value(dev, name, &value) < 0) |
605aa52f | 1368 | return false; |
912541b0 | 1369 | break; |
25de7aa7 | 1370 | case SUBST_TYPE_SUBSYS: |
76b9bdd9 | 1371 | if (util_resolve_subsys_kernel(name, vbuf, sizeof(vbuf), true) < 0) |
605aa52f | 1372 | return false; |
912541b0 KS |
1373 | value = vbuf; |
1374 | break; | |
1375 | default: | |
25de7aa7 | 1376 | assert_not_reached("Invalid attribute substitution type"); |
912541b0 KS |
1377 | } |
1378 | ||
1379 | /* remove trailing whitespace, if not asked to match for it */ | |
25de7aa7 YW |
1380 | if (token->attr_match_remove_trailing_whitespace) { |
1381 | if (value != vbuf) { | |
1382 | strscpy(vbuf, sizeof(vbuf), value); | |
1383 | value = vbuf; | |
912541b0 | 1384 | } |
25de7aa7 YW |
1385 | |
1386 | delete_trailing_chars(vbuf, NULL); | |
912541b0 KS |
1387 | } |
1388 | ||
25de7aa7 | 1389 | return token_match_string(token, value); |
6880b25d KS |
1390 | } |
1391 | ||
25de7aa7 YW |
1392 | static int get_property_from_string(char *line, char **ret_key, char **ret_value) { |
1393 | char *key, *val; | |
1394 | size_t len; | |
6880b25d | 1395 | |
25de7aa7 YW |
1396 | assert(line); |
1397 | assert(ret_key); | |
1398 | assert(ret_value); | |
1399 | ||
1400 | /* find key */ | |
1401 | key = skip_leading_chars(line, NULL); | |
912541b0 | 1402 | |
25de7aa7 | 1403 | /* comment or empty line */ |
41c81c4a YW |
1404 | if (IN_SET(key[0], '#', '\0')) { |
1405 | *ret_key = *ret_value = NULL; | |
d838e145 | 1406 | return 0; |
41c81c4a | 1407 | } |
912541b0 | 1408 | |
25de7aa7 YW |
1409 | /* split key/value */ |
1410 | val = strchr(key, '='); | |
1411 | if (!val) | |
1412 | return -EINVAL; | |
1413 | *val++ = '\0'; | |
cf697ec0 | 1414 | |
25de7aa7 YW |
1415 | key = strstrip(key); |
1416 | if (isempty(key)) | |
1417 | return -EINVAL; | |
912541b0 | 1418 | |
25de7aa7 YW |
1419 | val = strstrip(val); |
1420 | if (isempty(val)) | |
1421 | return -EINVAL; | |
912541b0 | 1422 | |
25de7aa7 YW |
1423 | /* unquote */ |
1424 | if (IN_SET(val[0], '"', '\'')) { | |
1425 | len = strlen(val); | |
1426 | if (len == 1 || val[len-1] != val[0]) | |
1427 | return -EINVAL; | |
1428 | val[len-1] = '\0'; | |
1429 | val++; | |
1430 | } | |
adeba500 | 1431 | |
25de7aa7 YW |
1432 | *ret_key = key; |
1433 | *ret_value = val; | |
41c81c4a | 1434 | return 1; |
25de7aa7 | 1435 | } |
f4cf2e5b | 1436 | |
25de7aa7 YW |
1437 | static int import_parent_into_properties(sd_device *dev, const char *filter) { |
1438 | const char *key, *val; | |
1439 | sd_device *parent; | |
1440 | int r; | |
f4cf2e5b | 1441 | |
25de7aa7 YW |
1442 | assert(dev); |
1443 | assert(filter); | |
912541b0 | 1444 | |
25de7aa7 YW |
1445 | r = sd_device_get_parent(dev, &parent); |
1446 | if (r == -ENOENT) | |
1447 | return 0; | |
1448 | if (r < 0) | |
1449 | return r; | |
1450 | ||
1451 | FOREACH_DEVICE_PROPERTY(parent, key, val) { | |
1452 | if (fnmatch(filter, key, 0) != 0) | |
912541b0 | 1453 | continue; |
25de7aa7 YW |
1454 | r = device_add_property(dev, key, val); |
1455 | if (r < 0) | |
1456 | return r; | |
1457 | } | |
912541b0 | 1458 | |
25de7aa7 YW |
1459 | return 1; |
1460 | } | |
912541b0 | 1461 | |
25de7aa7 YW |
1462 | static int attr_subst_subdir(char attr[static UTIL_PATH_SIZE]) { |
1463 | _cleanup_closedir_ DIR *dir = NULL; | |
1464 | struct dirent *dent; | |
1465 | char buf[UTIL_PATH_SIZE], *p; | |
1466 | const char *tail; | |
1467 | size_t len, size; | |
912541b0 | 1468 | |
2caa38e9 LP |
1469 | assert(attr); |
1470 | ||
25de7aa7 YW |
1471 | tail = strstr(attr, "/*/"); |
1472 | if (!tail) | |
1473 | return 0; | |
912541b0 | 1474 | |
25de7aa7 YW |
1475 | len = tail - attr + 1; /* include slash at the end */ |
1476 | tail += 2; /* include slash at the beginning */ | |
88b013b2 | 1477 | |
25de7aa7 YW |
1478 | p = buf; |
1479 | size = sizeof(buf); | |
1480 | size -= strnpcpy(&p, size, attr, len); | |
88b013b2 | 1481 | |
25de7aa7 YW |
1482 | dir = opendir(buf); |
1483 | if (!dir) | |
1484 | return -errno; | |
912541b0 | 1485 | |
25de7aa7 YW |
1486 | FOREACH_DIRENT_ALL(dent, dir, break) { |
1487 | if (dent->d_name[0] == '.') | |
1488 | continue; | |
1489 | ||
1490 | strscpyl(p, size, dent->d_name, tail, NULL); | |
1491 | if (faccessat(dirfd(dir), p, F_OK, 0) < 0) | |
1492 | continue; | |
1493 | ||
1494 | strcpy(attr, buf); | |
1495 | return 0; | |
1496 | } | |
1497 | ||
1498 | return -ENOENT; | |
1499 | } | |
1500 | ||
1501 | static int udev_rule_apply_token_to_event( | |
1502 | UdevRules *rules, | |
1503 | sd_device *dev, | |
1504 | UdevEvent *event, | |
1505 | usec_t timeout_usec, | |
1506 | Hashmap *properties_list) { | |
1507 | ||
1508 | UdevRuleToken *token; | |
1509 | char buf[UTIL_PATH_SIZE]; | |
1510 | const char *val; | |
1511 | size_t count; | |
1512 | bool match; | |
1513 | int r; | |
1514 | ||
1515 | assert(rules); | |
1516 | assert(dev); | |
1517 | assert(event); | |
1518 | ||
1519 | /* This returns the following values: | |
1520 | * 0 on the current token does not match the event, | |
1521 | * 1 on the current token matches the event, and | |
1522 | * negative errno on some critical errors. */ | |
1523 | ||
1524 | token = rules->current_file->current_line->current_token; | |
1525 | ||
1526 | switch (token->type) { | |
1527 | case TK_M_ACTION: { | |
1528 | DeviceAction a; | |
1529 | ||
1530 | r = device_get_action(dev, &a); | |
1531 | if (r < 0) | |
1532 | return log_rule_error_errno(dev, rules, r, "Failed to get uevent action type: %m"); | |
1533 | ||
1534 | return token_match_string(token, device_action_to_string(a)); | |
1535 | } | |
1536 | case TK_M_DEVPATH: | |
1537 | r = sd_device_get_devpath(dev, &val); | |
1538 | if (r < 0) | |
1539 | return log_rule_error_errno(dev, rules, r, "Failed to get devpath: %m"); | |
1540 | ||
1541 | return token_match_string(token, val); | |
1542 | case TK_M_KERNEL: | |
1543 | case TK_M_PARENTS_KERNEL: | |
1544 | r = sd_device_get_sysname(dev, &val); | |
1545 | if (r < 0) | |
1546 | return log_rule_error_errno(dev, rules, r, "Failed to get sysname: %m"); | |
1547 | ||
1548 | return token_match_string(token, val); | |
1549 | case TK_M_DEVLINK: | |
1550 | FOREACH_DEVICE_DEVLINK(dev, val) | |
1551 | if (token_match_string(token, strempty(startswith(val, "/dev/")))) | |
1552 | return token->op == OP_MATCH; | |
1553 | return token->op == OP_NOMATCH; | |
1554 | case TK_M_NAME: | |
1555 | return token_match_string(token, event->name); | |
1556 | case TK_M_ENV: | |
1557 | if (sd_device_get_property_value(dev, (const char*) token->data, &val) < 0) | |
1558 | val = hashmap_get(properties_list, token->data); | |
1559 | ||
1560 | return token_match_string(token, val); | |
1561 | case TK_M_TAG: | |
1562 | case TK_M_PARENTS_TAG: | |
1563 | FOREACH_DEVICE_TAG(dev, val) | |
1564 | if (token_match_string(token, val)) | |
1565 | return token->op == OP_MATCH; | |
1566 | return token->op == OP_NOMATCH; | |
1567 | case TK_M_SUBSYSTEM: | |
1568 | case TK_M_PARENTS_SUBSYSTEM: | |
1569 | r = sd_device_get_subsystem(dev, &val); | |
1570 | if (r == -ENOENT) | |
1571 | val = NULL; | |
1572 | else if (r < 0) | |
1573 | return log_rule_error_errno(dev, rules, r, "Failed to get subsystem: %m"); | |
1574 | ||
1575 | return token_match_string(token, val); | |
1576 | case TK_M_DRIVER: | |
1577 | case TK_M_PARENTS_DRIVER: | |
1578 | r = sd_device_get_driver(dev, &val); | |
1579 | if (r == -ENOENT) | |
1580 | val = NULL; | |
1581 | else if (r < 0) | |
1582 | return log_rule_error_errno(dev, rules, r, "Failed to get driver: %m"); | |
1583 | ||
1584 | return token_match_string(token, val); | |
1585 | case TK_M_ATTR: | |
1586 | case TK_M_PARENTS_ATTR: | |
1587 | return token_match_attr(token, dev, event); | |
1588 | case TK_M_SYSCTL: { | |
1589 | _cleanup_free_ char *value = NULL; | |
1590 | ||
1591 | (void) udev_event_apply_format(event, (const char*) token->data, buf, sizeof(buf), false); | |
1592 | r = sysctl_read(sysctl_normalize(buf), &value); | |
1593 | if (r < 0 && r != -ENOENT) | |
1594 | return log_rule_error_errno(dev, rules, r, "Failed to read sysctl '%s': %m", buf); | |
1595 | ||
1596 | return token_match_string(token, strstrip(value)); | |
1597 | } | |
1598 | case TK_M_TEST: { | |
1599 | mode_t mode = PTR_TO_MODE(token->data); | |
1600 | struct stat statbuf; | |
1601 | ||
1602 | (void) udev_event_apply_format(event, token->value, buf, sizeof(buf), false); | |
1603 | if (!path_is_absolute(buf) && | |
1604 | util_resolve_subsys_kernel(buf, buf, sizeof(buf), false) < 0) { | |
1605 | char tmp[UTIL_PATH_SIZE]; | |
1606 | ||
1607 | r = sd_device_get_syspath(dev, &val); | |
1608 | if (r < 0) | |
1609 | return log_rule_error_errno(dev, rules, r, "Failed to get syspath: %m"); | |
1610 | ||
1611 | strscpy(tmp, sizeof(tmp), buf); | |
1612 | strscpyl(buf, sizeof(buf), val, "/", tmp, NULL); | |
1613 | } | |
1614 | ||
1615 | r = attr_subst_subdir(buf); | |
1616 | if (r == -ENOENT) | |
1617 | return token->op == OP_NOMATCH; | |
1618 | if (r < 0) | |
1619 | return log_rule_error_errno(dev, rules, r, "Failed to test the existence of '%s': %m", buf); | |
1620 | ||
1621 | if (stat(buf, &statbuf) < 0) | |
1622 | return token->op == OP_NOMATCH; | |
1623 | ||
1624 | if (mode == MODE_INVALID) | |
1625 | return token->op == OP_MATCH; | |
1626 | ||
1627 | match = (((statbuf.st_mode ^ mode) & 07777) == 0); | |
1628 | return token->op == (match ? OP_MATCH : OP_NOMATCH); | |
1629 | } | |
1630 | case TK_M_PROGRAM: { | |
1631 | char result[UTIL_LINE_SIZE]; | |
1632 | ||
1633 | event->program_result = mfree(event->program_result); | |
1634 | (void) udev_event_apply_format(event, token->value, buf, sizeof(buf), false); | |
1635 | log_rule_debug(dev, rules, "Running PROGRAM '%s'", buf); | |
1636 | ||
1637 | r = udev_event_spawn(event, timeout_usec, true, buf, result, sizeof(result)); | |
1638 | if (r < 0) | |
1639 | return log_rule_error_errno(dev, rules, r, "Failed to execute '%s': %m", buf); | |
1640 | if (r > 0) | |
1641 | return token->op == OP_NOMATCH; | |
1642 | ||
1643 | delete_trailing_chars(result, "\n"); | |
1644 | count = util_replace_chars(result, UDEV_ALLOWED_CHARS_INPUT); | |
1645 | if (count > 0) | |
1646 | log_rule_debug(dev, rules, "Replaced %zu character(s) from result of '%s'", | |
1647 | count, buf); | |
1648 | ||
1649 | event->program_result = strdup(result); | |
1650 | return token->op == OP_MATCH; | |
1651 | } | |
1652 | case TK_M_IMPORT_FILE: { | |
1653 | _cleanup_fclose_ FILE *f = NULL; | |
1654 | ||
1655 | (void) udev_event_apply_format(event, token->value, buf, sizeof(buf), false); | |
1656 | log_rule_debug(dev, rules, "Importing properties from '%s'", buf); | |
1657 | ||
1658 | f = fopen(buf, "re"); | |
1659 | if (!f) { | |
1660 | if (errno != ENOENT) | |
1661 | return log_rule_error_errno(dev, rules, errno, | |
1662 | "Failed to open '%s': %m", buf); | |
1663 | return token->op == OP_NOMATCH; | |
1664 | } | |
912541b0 | 1665 | |
25de7aa7 YW |
1666 | for (;;) { |
1667 | _cleanup_free_ char *line = NULL; | |
1668 | char *key, *value; | |
1669 | ||
1670 | r = read_line(f, LONG_LINE_MAX, &line); | |
1671 | if (r < 0) { | |
1672 | log_rule_debug_errno(dev, rules, r, | |
1673 | "Failed to read '%s', ignoring: %m", buf); | |
1674 | return token->op == OP_NOMATCH; | |
1675 | } | |
1676 | if (r == 0) | |
912541b0 | 1677 | break; |
25de7aa7 YW |
1678 | |
1679 | r = get_property_from_string(line, &key, &value); | |
23bf8dd7 | 1680 | if (r < 0) { |
25de7aa7 YW |
1681 | log_rule_debug_errno(dev, rules, r, |
1682 | "Failed to parse key and value from '%s', ignoring: %m", | |
1683 | line); | |
1684 | continue; | |
23bf8dd7 | 1685 | } |
41c81c4a YW |
1686 | if (r == 0) |
1687 | continue; | |
25de7aa7 YW |
1688 | |
1689 | r = device_add_property(dev, key, value); | |
1690 | if (r < 0) | |
1691 | return log_rule_error_errno(dev, rules, r, | |
1692 | "Failed to add property %s=%s: %m", | |
1693 | key, value); | |
912541b0 | 1694 | } |
912541b0 | 1695 | |
25de7aa7 YW |
1696 | return token->op == OP_MATCH; |
1697 | } | |
1698 | case TK_M_IMPORT_PROGRAM: { | |
1699 | char result[UTIL_LINE_SIZE], *line, *pos; | |
1700 | ||
1701 | (void) udev_event_apply_format(event, token->value, buf, sizeof(buf), false); | |
1702 | log_rule_debug(dev, rules, "Importing properties from results of '%s'", buf); | |
1703 | ||
1704 | r = udev_event_spawn(event, timeout_usec, true, buf, result, sizeof result); | |
1705 | if (r < 0) | |
1706 | return log_rule_error_errno(dev, rules, r, "Failed to execute '%s': %m", buf); | |
1707 | if (r > 0) { | |
1708 | log_rule_debug(dev, rules, "Command \"%s\" returned %d (error), ignoring", buf, r); | |
1709 | return token->op == OP_NOMATCH; | |
1710 | } | |
1711 | ||
1712 | for (line = result; !isempty(line); line = pos) { | |
1713 | char *key, *value; | |
1714 | ||
1715 | pos = strchr(line, '\n'); | |
1716 | if (pos) | |
1717 | *pos++ = '\0'; | |
1718 | ||
1719 | r = get_property_from_string(line, &key, &value); | |
23bf8dd7 | 1720 | if (r < 0) { |
25de7aa7 YW |
1721 | log_rule_debug_errno(dev, rules, r, |
1722 | "Failed to parse key and value from '%s', ignoring: %m", | |
1723 | line); | |
1724 | continue; | |
23bf8dd7 | 1725 | } |
41c81c4a YW |
1726 | if (r == 0) |
1727 | continue; | |
25de7aa7 YW |
1728 | |
1729 | r = device_add_property(dev, key, value); | |
1730 | if (r < 0) | |
1731 | return log_rule_error_errno(dev, rules, r, | |
1732 | "Failed to add property %s=%s: %m", | |
1733 | key, value); | |
912541b0 | 1734 | } |
912541b0 | 1735 | |
25de7aa7 YW |
1736 | return token->op == OP_MATCH; |
1737 | } | |
1738 | case TK_M_IMPORT_BUILTIN: { | |
1739 | UdevBuiltinCommand cmd = PTR_TO_UDEV_BUILTIN_CMD(token->data); | |
1740 | unsigned mask = 1U << (int) cmd; | |
1741 | ||
1742 | if (udev_builtin_run_once(cmd)) { | |
1743 | /* check if we ran already */ | |
1744 | if (event->builtin_run & mask) { | |
1745 | log_rule_debug(dev, rules, "Skipping builtin '%s' in IMPORT key", | |
1746 | udev_builtin_name(cmd)); | |
1747 | /* return the result from earlier run */ | |
1748 | return token->op == (event->builtin_ret & mask ? OP_NOMATCH : OP_MATCH); | |
912541b0 | 1749 | } |
25de7aa7 YW |
1750 | /* mark as ran */ |
1751 | event->builtin_run |= mask; | |
912541b0 | 1752 | } |
25de7aa7 YW |
1753 | |
1754 | (void) udev_event_apply_format(event, token->value, buf, sizeof(buf), false); | |
1755 | log_rule_debug(dev, rules, "Importing properties from results of builtin command '%s'", buf); | |
1756 | ||
1757 | r = udev_builtin_run(dev, cmd, buf, false); | |
1758 | if (r < 0) { | |
1759 | /* remember failure */ | |
1760 | log_rule_debug_errno(dev, rules, r, "Failed to run builtin '%s': %m", buf); | |
1761 | event->builtin_ret |= mask; | |
1762 | } | |
1763 | return token->op == (r >= 0 ? OP_MATCH : OP_NOMATCH); | |
1764 | } | |
1765 | case TK_M_IMPORT_DB: { | |
1766 | if (!event->dev_db_clone) | |
1767 | return token->op == OP_NOMATCH; | |
1768 | r = sd_device_get_property_value(event->dev_db_clone, token->value, &val); | |
1769 | if (r == -ENOENT) | |
1770 | return token->op == OP_NOMATCH; | |
1771 | if (r < 0) | |
1772 | return log_rule_error_errno(dev, rules, r, | |
1773 | "Failed to get property '%s' from database: %m", | |
1774 | token->value); | |
1775 | ||
1776 | r = device_add_property(dev, token->value, val); | |
1777 | if (r < 0) | |
1778 | return log_rule_error_errno(dev, rules, r, "Failed to add property '%s=%s': %m", | |
1779 | token->value, val); | |
1780 | return token->op == OP_MATCH; | |
1781 | } | |
1782 | case TK_M_IMPORT_CMDLINE: { | |
1783 | _cleanup_free_ char *value = NULL; | |
1784 | ||
1785 | r = proc_cmdline_get_key(token->value, PROC_CMDLINE_VALUE_OPTIONAL, &value); | |
1786 | if (r < 0) | |
1787 | return log_rule_error_errno(dev, rules, r, | |
1788 | "Failed to read '%s' option from /proc/cmdline: %m", | |
1789 | token->value); | |
1790 | if (r == 0) | |
1791 | return token->op == OP_NOMATCH; | |
1792 | ||
1793 | r = device_add_property(dev, token->value, value ?: "1"); | |
1794 | if (r < 0) | |
1795 | return log_rule_error_errno(dev, rules, r, "Failed to add property '%s=%s': %m", | |
1796 | token->value, value ?: "1"); | |
1797 | return token->op == OP_MATCH; | |
1798 | } | |
1799 | case TK_M_IMPORT_PARENT: { | |
1800 | (void) udev_event_apply_format(event, token->value, buf, sizeof(buf), false); | |
1801 | r = import_parent_into_properties(dev, buf); | |
1802 | if (r < 0) | |
1803 | return log_rule_error_errno(dev, rules, r, | |
1804 | "Failed to import properties '%s' from parent: %m", | |
1805 | buf); | |
1806 | return token->op == (r > 0 ? OP_MATCH : OP_NOMATCH); | |
1807 | } | |
1808 | case TK_M_RESULT: | |
1809 | return token_match_string(token, event->program_result); | |
1810 | case TK_A_OPTIONS_STRING_ESCAPE_NONE: | |
1811 | event->esc = ESCAPE_NONE; | |
1812 | break; | |
1813 | case TK_A_OPTIONS_STRING_ESCAPE_REPLACE: | |
1814 | event->esc = ESCAPE_REPLACE; | |
1815 | break; | |
1816 | case TK_A_OPTIONS_DB_PERSIST: | |
1817 | device_set_db_persist(dev); | |
1818 | break; | |
1819 | case TK_A_OPTIONS_INOTIFY_WATCH: | |
1820 | if (event->inotify_watch_final) | |
912541b0 | 1821 | break; |
25de7aa7 YW |
1822 | if (token->op == OP_ASSIGN_FINAL) |
1823 | event->inotify_watch_final = true; | |
1824 | ||
1825 | event->inotify_watch = token->data; | |
1826 | break; | |
1827 | case TK_A_OPTIONS_DEVLINK_PRIORITY: | |
1828 | device_set_devlink_priority(dev, PTR_TO_INT(token->data)); | |
1829 | break; | |
1830 | case TK_A_OWNER: { | |
1831 | char owner[UTIL_NAME_SIZE]; | |
1832 | const char *ow = owner; | |
1833 | ||
1834 | if (event->owner_final) | |
912541b0 | 1835 | break; |
25de7aa7 YW |
1836 | if (token->op == OP_ASSIGN_FINAL) |
1837 | event->owner_final = true; | |
1838 | ||
1839 | (void) udev_event_apply_format(event, token->value, owner, sizeof(owner), false); | |
1840 | r = get_user_creds(&ow, &event->uid, NULL, NULL, NULL, USER_CREDS_ALLOW_MISSING); | |
1841 | if (r < 0) | |
1842 | log_unknown_owner(dev, rules, r, "user", owner); | |
1843 | else | |
1844 | log_rule_debug(dev, rules, "OWNER %s(%u)", owner, event->uid); | |
1845 | break; | |
1846 | } | |
1847 | case TK_A_GROUP: { | |
1848 | char group[UTIL_NAME_SIZE]; | |
1849 | const char *gr = group; | |
1850 | ||
1851 | if (event->group_final) | |
912541b0 | 1852 | break; |
25de7aa7 YW |
1853 | if (token->op == OP_ASSIGN_FINAL) |
1854 | event->group_final = true; | |
c26547d6 | 1855 | |
25de7aa7 YW |
1856 | (void) udev_event_apply_format(event, token->value, group, sizeof(group), false); |
1857 | r = get_group_creds(&gr, &event->gid, USER_CREDS_ALLOW_MISSING); | |
1858 | if (r < 0) | |
1859 | log_unknown_owner(dev, rules, r, "group", group); | |
1860 | else | |
1861 | log_rule_debug(dev, rules, "GROUP %s(%u)", group, event->gid); | |
1862 | break; | |
1863 | } | |
1864 | case TK_A_MODE: { | |
1865 | char mode_str[UTIL_NAME_SIZE]; | |
d838e145 | 1866 | |
25de7aa7 YW |
1867 | if (event->mode_final) |
1868 | break; | |
1869 | if (token->op == OP_ASSIGN_FINAL) | |
1870 | event->mode_final = true; | |
4f985bd8 | 1871 | |
25de7aa7 YW |
1872 | (void) udev_event_apply_format(event, token->value, mode_str, sizeof(mode_str), false); |
1873 | r = parse_mode(mode_str, &event->mode); | |
1874 | if (r < 0) | |
1875 | log_rule_error_errno(dev, rules, r, "Failed to parse mode '%s', ignoring: %m", mode_str); | |
1876 | else | |
1877 | log_rule_debug(dev, rules, "MODE %#o", event->mode); | |
1878 | break; | |
1879 | } | |
1880 | case TK_A_OWNER_ID: | |
1881 | if (event->owner_final) | |
1882 | break; | |
1883 | if (token->op == OP_ASSIGN_FINAL) | |
1884 | event->owner_final = true; | |
1885 | if (!token->data) | |
1886 | break; | |
1887 | event->uid = PTR_TO_UID(token->data); | |
1888 | log_rule_debug(dev, rules, "OWNER %u", event->uid); | |
1889 | break; | |
1890 | case TK_A_GROUP_ID: | |
1891 | if (event->group_final) | |
1892 | break; | |
1893 | if (token->op == OP_ASSIGN_FINAL) | |
1894 | event->group_final = true; | |
1895 | if (!token->data) | |
1896 | break; | |
1897 | event->gid = PTR_TO_GID(token->data); | |
1898 | log_rule_debug(dev, rules, "GROUP %u", event->gid); | |
1899 | break; | |
1900 | case TK_A_MODE_ID: | |
1901 | if (event->mode_final) | |
1902 | break; | |
1903 | if (token->op == OP_ASSIGN_FINAL) | |
1904 | event->mode_final = true; | |
1905 | if (!token->data) | |
1906 | break; | |
1907 | event->mode = PTR_TO_MODE(token->data); | |
1908 | log_rule_debug(dev, rules, "MODE %#o", event->mode); | |
1909 | break; | |
1910 | case TK_A_SECLABEL: { | |
1911 | _cleanup_free_ char *name = NULL, *label = NULL; | |
1912 | char label_str[UTIL_LINE_SIZE] = {}; | |
d838e145 | 1913 | |
25de7aa7 YW |
1914 | name = strdup((const char*) token->data); |
1915 | if (!name) | |
1916 | return log_oom(); | |
d838e145 | 1917 | |
25de7aa7 YW |
1918 | (void) udev_event_apply_format(event, token->value, label_str, sizeof(label_str), false); |
1919 | if (!isempty(label_str)) | |
1920 | label = strdup(label_str); | |
1921 | else | |
1922 | label = strdup(token->value); | |
1923 | if (!label) | |
1924 | return log_oom(); | |
a6ca3c19 | 1925 | |
25de7aa7 YW |
1926 | if (token->op == OP_ASSIGN) |
1927 | ordered_hashmap_clear_free_free(event->seclabel_list); | |
07845c14 | 1928 | |
25de7aa7 YW |
1929 | r = ordered_hashmap_ensure_allocated(&event->seclabel_list, NULL); |
1930 | if (r < 0) | |
1931 | return log_oom(); | |
07845c14 | 1932 | |
25de7aa7 YW |
1933 | r = ordered_hashmap_put(event->seclabel_list, name, label); |
1934 | if (r < 0) | |
1935 | return log_oom(); | |
1936 | log_rule_debug(dev, rules, "SECLABEL{%s}='%s'", name, label); | |
1937 | name = label = NULL; | |
1938 | break; | |
1939 | } | |
1940 | case TK_A_ENV: { | |
1941 | const char *name = (const char*) token->data; | |
1942 | char value_new[UTIL_NAME_SIZE], *p = value_new; | |
1943 | size_t l = sizeof(value_new); | |
07845c14 | 1944 | |
25de7aa7 YW |
1945 | if (isempty(token->value)) { |
1946 | if (token->op == OP_ADD) | |
912541b0 | 1947 | break; |
25de7aa7 YW |
1948 | r = device_add_property(dev, name, NULL); |
1949 | if (r < 0) | |
1950 | return log_rule_error_errno(dev, rules, r, "Failed to remove property '%s': %m", name); | |
912541b0 KS |
1951 | break; |
1952 | } | |
912541b0 | 1953 | |
25de7aa7 YW |
1954 | if (token->op == OP_ADD && |
1955 | sd_device_get_property_value(dev, name, &val) >= 0) | |
1956 | l = strpcpyl(&p, l, val, " ", NULL); | |
1957 | ||
1958 | (void) udev_event_apply_format(event, token->value, p, l, false); | |
d838e145 | 1959 | |
25de7aa7 YW |
1960 | r = device_add_property(dev, name, value_new); |
1961 | if (r < 0) | |
1962 | return log_rule_error_errno(dev, rules, r, "Failed to add property '%s=%s': %m", name, value_new); | |
1963 | break; | |
1964 | } | |
1965 | case TK_A_TAG: { | |
1966 | (void) udev_event_apply_format(event, token->value, buf, sizeof(buf), false); | |
1967 | if (token->op == OP_ASSIGN) | |
1968 | device_cleanup_tags(dev); | |
1969 | ||
1970 | if (buf[strspn(buf, ALPHANUMERICAL "-_")] != '\0') { | |
1971 | log_rule_error(dev, rules, "Invalid tag name '%s', ignoring", buf); | |
912541b0 KS |
1972 | break; |
1973 | } | |
25de7aa7 YW |
1974 | if (token->op == OP_REMOVE) |
1975 | device_remove_tag(dev, buf); | |
1976 | else { | |
1977 | r = device_add_tag(dev, buf); | |
1978 | if (r < 0) | |
1979 | return log_rule_error_errno(dev, rules, r, "Failed to add tag '%s': %m", buf); | |
1980 | } | |
1981 | break; | |
1982 | } | |
1983 | case TK_A_NAME: { | |
1984 | if (event->name_final) | |
1985 | break; | |
1986 | if (token->op == OP_ASSIGN_FINAL) | |
1987 | event->name_final = true; | |
912541b0 | 1988 | |
25de7aa7 YW |
1989 | (void) udev_event_apply_format(event, token->value, buf, sizeof(buf), false); |
1990 | if (IN_SET(event->esc, ESCAPE_UNSET, ESCAPE_REPLACE)) { | |
1991 | count = util_replace_chars(buf, "/"); | |
912541b0 | 1992 | if (count > 0) |
25de7aa7 YW |
1993 | log_rule_debug(dev, rules, "Replaced %zu character(s) from result of NAME=\"%s\"", |
1994 | count, token->value); | |
912541b0 | 1995 | } |
25de7aa7 YW |
1996 | if (sd_device_get_devnum(dev, NULL) >= 0 && |
1997 | (sd_device_get_devname(dev, &val) < 0 || | |
1998 | !streq_ptr(buf, startswith(val, "/dev/")))) { | |
1999 | log_rule_error(dev, rules, | |
2000 | "Kernel device nodes cannot be renamed, ignoring NAME=\"%s\"; please fix it.", | |
2001 | token->value); | |
912541b0 KS |
2002 | break; |
2003 | } | |
25de7aa7 YW |
2004 | if (free_and_strdup(&event->name, buf) < 0) |
2005 | return log_oom(); | |
2006 | ||
2007 | log_rule_debug(dev, rules, "NAME '%s'", event->name); | |
2008 | break; | |
2009 | } | |
2010 | case TK_A_DEVLINK: { | |
2011 | char *p; | |
2012 | ||
2013 | if (event->devlink_final) | |
2014 | break; | |
2015 | if (sd_device_get_devnum(dev, NULL) < 0) | |
2016 | break; | |
2017 | if (token->op == OP_ASSIGN_FINAL) | |
2018 | event->devlink_final = true; | |
2019 | if (IN_SET(token->op, OP_ASSIGN, OP_ASSIGN_FINAL)) | |
2020 | device_cleanup_devlinks(dev); | |
2021 | ||
2022 | /* allow multiple symlinks separated by spaces */ | |
2023 | (void) udev_event_apply_format(event, token->value, buf, sizeof(buf), event->esc != ESCAPE_NONE); | |
2024 | if (event->esc == ESCAPE_UNSET) | |
2025 | count = util_replace_chars(buf, "/ "); | |
2026 | else if (event->esc == ESCAPE_REPLACE) | |
2027 | count = util_replace_chars(buf, "/"); | |
2028 | else | |
2029 | count = 0; | |
2030 | if (count > 0) | |
2031 | log_rule_debug(dev, rules, "Replaced %zu character(s) from result of LINK", count); | |
2032 | ||
2033 | p = skip_leading_chars(buf, NULL); | |
2034 | while (!isempty(p)) { | |
2035 | char filename[UTIL_PATH_SIZE], *next; | |
2036 | ||
2037 | next = strchr(p, ' '); | |
2038 | if (next) { | |
2039 | *next++ = '\0'; | |
2040 | next = skip_leading_chars(next, NULL); | |
2041 | } | |
2042 | ||
2043 | strscpyl(filename, sizeof(filename), "/dev/", p, NULL); | |
2044 | r = device_add_devlink(dev, filename); | |
f4cf2e5b | 2045 | if (r < 0) |
25de7aa7 YW |
2046 | return log_rule_error_errno(dev, rules, r, "Failed to add devlink '%s': %m", filename); |
2047 | ||
2048 | log_rule_debug(dev, rules, "LINK '%s'", p); | |
2049 | p = next; | |
2050 | } | |
2051 | break; | |
2052 | } | |
2053 | case TK_A_ATTR: { | |
2054 | const char *key_name = (const char*) token->data; | |
2055 | char value[UTIL_NAME_SIZE]; | |
2056 | ||
2057 | if (util_resolve_subsys_kernel(key_name, buf, sizeof(buf), false) < 0 && | |
2058 | sd_device_get_syspath(dev, &val) >= 0) | |
2059 | strscpyl(buf, sizeof(buf), val, "/", key_name, NULL); | |
2060 | ||
2061 | r = attr_subst_subdir(buf); | |
2062 | if (r < 0) { | |
2063 | log_rule_error_errno(dev, rules, r, "Could not find file matches '%s', ignoring: %m", buf); | |
f4cf2e5b KS |
2064 | break; |
2065 | } | |
25de7aa7 | 2066 | (void) udev_event_apply_format(event, token->value, value, sizeof(value), false); |
6cdc62aa | 2067 | |
25de7aa7 YW |
2068 | log_rule_debug(dev, rules, "ATTR '%s' writing '%s'", buf, value); |
2069 | r = write_string_file(buf, value, WRITE_STRING_FILE_VERIFY_ON_FAILURE | WRITE_STRING_FILE_DISABLE_BUFFER); | |
2070 | if (r < 0) | |
2071 | log_rule_error_errno(dev, rules, r, "Failed to write ATTR{%s}, ignoring: %m", buf); | |
2072 | break; | |
2073 | } | |
2074 | case TK_A_SYSCTL: { | |
2075 | char value[UTIL_NAME_SIZE]; | |
2076 | ||
2077 | (void) udev_event_apply_format(event, (const char*) token->data, buf, sizeof(buf), false); | |
2078 | (void) udev_event_apply_format(event, token->value, value, sizeof(value), false); | |
2079 | sysctl_normalize(buf); | |
2080 | log_rule_debug(dev, rules, "SYSCTL '%s' writing '%s'", buf, value); | |
2081 | r = sysctl_write(buf, value); | |
2082 | if (r < 0) | |
2083 | log_rule_error_errno(dev, rules, r, "Failed to write SYSCTL{%s}='%s', ignoring: %m", buf, value); | |
2084 | break; | |
2085 | } | |
2086 | case TK_A_RUN_BUILTIN: | |
2087 | case TK_A_RUN_PROGRAM: { | |
2088 | _cleanup_free_ char *cmd = NULL; | |
29448498 | 2089 | |
25de7aa7 YW |
2090 | if (event->run_final) |
2091 | break; | |
2092 | if (token->op == OP_ASSIGN_FINAL) | |
2093 | event->run_final = true; | |
29448498 | 2094 | |
25de7aa7 YW |
2095 | if (IN_SET(token->op, OP_ASSIGN, OP_ASSIGN_FINAL)) |
2096 | ordered_hashmap_clear_free_key(event->run_list); | |
29448498 | 2097 | |
25de7aa7 YW |
2098 | r = ordered_hashmap_ensure_allocated(&event->run_list, NULL); |
2099 | if (r < 0) | |
2100 | return log_oom(); | |
29448498 | 2101 | |
1448820a YW |
2102 | (void) udev_event_apply_format(event, token->value, buf, sizeof(buf), false); |
2103 | ||
2104 | cmd = strdup(buf); | |
25de7aa7 YW |
2105 | if (!cmd) |
2106 | return log_oom(); | |
29448498 | 2107 | |
25de7aa7 YW |
2108 | r = ordered_hashmap_put(event->run_list, cmd, token->data); |
2109 | if (r < 0) | |
2110 | return log_oom(); | |
83cd6b75 | 2111 | |
25de7aa7 YW |
2112 | TAKE_PTR(cmd); |
2113 | ||
2114 | log_rule_debug(dev, rules, "RUN '%s'", token->value); | |
2115 | break; | |
2116 | } | |
2117 | case TK_A_OPTIONS_STATIC_NODE: | |
2118 | /* do nothing for events. */ | |
2119 | break; | |
2120 | default: | |
2121 | assert_not_reached("Invalid token type"); | |
2122 | } | |
2123 | ||
2124 | return true; | |
2125 | } | |
2126 | ||
2127 | static bool token_is_for_parents(UdevRuleToken *token) { | |
2128 | return token->type >= TK_M_PARENTS_KERNEL && token->type <= TK_M_PARENTS_TAG; | |
2129 | } | |
2130 | ||
2131 | static int udev_rule_apply_parent_token_to_event( | |
2132 | UdevRules *rules, | |
2133 | UdevEvent *event) { | |
2134 | ||
2135 | UdevRuleLine *line; | |
2136 | UdevRuleToken *head; | |
2137 | int r; | |
2138 | ||
2139 | line = rules->current_file->current_line; | |
2140 | head = rules->current_file->current_line->current_token; | |
2141 | event->dev_parent = event->dev; | |
2142 | for (;;) { | |
2143 | LIST_FOREACH(tokens, line->current_token, head) { | |
2144 | if (!token_is_for_parents(line->current_token)) | |
2145 | return true; /* All parent tokens match. */ | |
2146 | r = udev_rule_apply_token_to_event(rules, event->dev_parent, event, 0, NULL); | |
2147 | if (r < 0) | |
2148 | return r; | |
2149 | if (r == 0) | |
912541b0 | 2150 | break; |
25de7aa7 YW |
2151 | } |
2152 | if (!line->current_token) | |
2153 | /* All parent tokens match. But no assign tokens in the line. Hmm... */ | |
2154 | return true; | |
2155 | ||
2156 | if (sd_device_get_parent(event->dev_parent, &event->dev_parent) < 0) { | |
2157 | event->dev_parent = NULL; | |
2158 | return false; | |
2159 | } | |
2160 | } | |
2161 | } | |
2162 | ||
2163 | static int udev_rule_apply_line_to_event( | |
2164 | UdevRules *rules, | |
2165 | UdevEvent *event, | |
2166 | usec_t timeout_usec, | |
2167 | Hashmap *properties_list, | |
2168 | UdevRuleLine **next_line) { | |
2169 | ||
2170 | UdevRuleLine *line = rules->current_file->current_line; | |
2171 | UdevRuleLineType mask = LINE_HAS_GOTO | LINE_UPDATE_SOMETHING; | |
2172 | UdevRuleToken *token, *next_token; | |
2173 | bool parents_done = false; | |
2174 | DeviceAction action; | |
2175 | int r; | |
912541b0 | 2176 | |
25de7aa7 YW |
2177 | r = device_get_action(event->dev, &action); |
2178 | if (r < 0) | |
2179 | return r; | |
2180 | ||
2181 | if (action != DEVICE_ACTION_REMOVE) { | |
2182 | if (sd_device_get_devnum(event->dev, NULL) >= 0) | |
2183 | mask |= LINE_HAS_DEVLINK; | |
2184 | ||
2185 | if (sd_device_get_ifindex(event->dev, NULL) >= 0) | |
2186 | mask |= LINE_HAS_NAME; | |
2187 | } | |
2188 | ||
2189 | if ((line->type & mask) == 0) | |
2190 | return 0; | |
2191 | ||
2192 | event->esc = ESCAPE_UNSET; | |
2193 | LIST_FOREACH_SAFE(tokens, token, next_token, line->tokens) { | |
2194 | line->current_token = token; | |
2195 | ||
2196 | if (token_is_for_parents(token)) { | |
2197 | if (parents_done) | |
2198 | continue; | |
2199 | ||
2200 | r = udev_rule_apply_parent_token_to_event(rules, event); | |
2201 | if (r <= 0) | |
2202 | return r; | |
2203 | ||
2204 | parents_done = true; | |
2205 | continue; | |
912541b0 KS |
2206 | } |
2207 | ||
25de7aa7 YW |
2208 | r = udev_rule_apply_token_to_event(rules, event->dev, event, timeout_usec, properties_list); |
2209 | if (r <= 0) | |
2210 | return r; | |
912541b0 | 2211 | } |
d838e145 | 2212 | |
25de7aa7 YW |
2213 | if (line->goto_line) |
2214 | *next_line = line->goto_line; | |
2215 | ||
d838e145 | 2216 | return 0; |
6880b25d | 2217 | } |
761dfddc | 2218 | |
25de7aa7 YW |
2219 | int udev_rules_apply_to_event( |
2220 | UdevRules *rules, | |
2221 | UdevEvent *event, | |
2222 | usec_t timeout_usec, | |
2223 | Hashmap *properties_list) { | |
2224 | ||
2225 | UdevRuleFile *file; | |
2226 | UdevRuleLine *next_line; | |
2227 | int r; | |
2228 | ||
2229 | assert(rules); | |
2230 | assert(event); | |
2231 | ||
2232 | LIST_FOREACH(rule_files, file, rules->rule_files) { | |
2233 | rules->current_file = file; | |
2234 | LIST_FOREACH_SAFE(rule_lines, file->current_line, next_line, file->rule_lines) { | |
2235 | r = udev_rule_apply_line_to_event(rules, event, timeout_usec, properties_list, &next_line); | |
2236 | if (r < 0) | |
2237 | return r; | |
2238 | } | |
2239 | } | |
2240 | ||
2241 | return 0; | |
2242 | } | |
2243 | ||
2244 | static int apply_static_dev_perms(const char *devnode, uid_t uid, gid_t gid, mode_t mode, char **tags) { | |
2245 | char device_node[UTIL_PATH_SIZE], tags_dir[UTIL_PATH_SIZE], tag_symlink[UTIL_PATH_SIZE]; | |
2246 | _cleanup_free_ char *unescaped_filename = NULL; | |
2247 | struct stat stats; | |
84b6ad70 | 2248 | char **t; |
fdd21be6 | 2249 | int r; |
912541b0 | 2250 | |
25de7aa7 YW |
2251 | assert(devnode); |
2252 | ||
2253 | if (uid == UID_INVALID && gid == GID_INVALID && mode == MODE_INVALID && !tags) | |
84b6ad70 | 2254 | return 0; |
912541b0 | 2255 | |
25de7aa7 YW |
2256 | strscpyl(device_node, sizeof(device_node), "/dev/", devnode, NULL); |
2257 | if (stat(device_node, &stats) < 0) { | |
2258 | if (errno != ENOENT) | |
2259 | return log_error_errno(errno, "Failed to stat %s: %m", device_node); | |
2260 | return 0; | |
2261 | } | |
84b6ad70 | 2262 | |
25de7aa7 YW |
2263 | if (!S_ISBLK(stats.st_mode) && !S_ISCHR(stats.st_mode)) { |
2264 | log_warning("%s is neither block nor character device, ignoring.", device_node); | |
2265 | return 0; | |
2266 | } | |
912541b0 | 2267 | |
25de7aa7 YW |
2268 | if (!strv_isempty(tags)) { |
2269 | unescaped_filename = xescape(devnode, "/."); | |
2270 | if (!unescaped_filename) | |
2271 | return log_oom(); | |
2272 | } | |
ca2bb160 | 2273 | |
25de7aa7 YW |
2274 | /* export the tags to a directory as symlinks, allowing otherwise dead nodes to be tagged */ |
2275 | STRV_FOREACH(t, tags) { | |
2276 | strscpyl(tags_dir, sizeof(tags_dir), "/run/udev/static_node-tags/", *t, "/", NULL); | |
2277 | r = mkdir_p(tags_dir, 0755); | |
2278 | if (r < 0) | |
2279 | return log_error_errno(r, "Failed to create %s: %m", tags_dir); | |
d6f116a7 | 2280 | |
25de7aa7 YW |
2281 | strscpyl(tag_symlink, sizeof(tag_symlink), tags_dir, unescaped_filename, NULL); |
2282 | r = symlink(device_node, tag_symlink); | |
2283 | if (r < 0 && errno != EEXIST) | |
2284 | return log_error_errno(errno, "Failed to create symlink %s -> %s: %m", | |
2285 | tag_symlink, device_node); | |
2286 | } | |
84b6ad70 | 2287 | |
25de7aa7 YW |
2288 | /* don't touch the permissions if only the tags were set */ |
2289 | if (uid == UID_INVALID && gid == GID_INVALID && mode == MODE_INVALID) | |
2290 | return 0; | |
84b6ad70 | 2291 | |
25de7aa7 YW |
2292 | if (mode == MODE_INVALID) |
2293 | mode = gid_is_valid(gid) ? 0660 : 0600; | |
2294 | if (!uid_is_valid(uid)) | |
2295 | uid = 0; | |
2296 | if (!gid_is_valid(gid)) | |
2297 | gid = 0; | |
84b6ad70 | 2298 | |
25de7aa7 YW |
2299 | r = chmod_and_chown(device_node, mode, uid, gid); |
2300 | if (r < 0) | |
2301 | return log_error_errno(errno, "Failed to chown '%s' %u %u: %m", | |
2302 | device_node, uid, gid); | |
2303 | else | |
2304 | log_debug("chown '%s' %u:%u", device_node, uid, gid); | |
84b6ad70 | 2305 | |
25de7aa7 YW |
2306 | (void) utimensat(AT_FDCWD, device_node, NULL, 0); |
2307 | return 0; | |
2308 | } | |
84b6ad70 | 2309 | |
25de7aa7 YW |
2310 | static int udev_rule_line_apply_static_dev_perms(UdevRuleLine *rule_line) { |
2311 | UdevRuleToken *token; | |
2312 | _cleanup_free_ char **tags = NULL; | |
2313 | uid_t uid = UID_INVALID; | |
2314 | gid_t gid = GID_INVALID; | |
2315 | mode_t mode = MODE_INVALID; | |
2316 | int r; | |
d6f116a7 | 2317 | |
25de7aa7 | 2318 | assert(rule_line); |
912541b0 | 2319 | |
25de7aa7 YW |
2320 | if (!FLAGS_SET(rule_line->type, LINE_HAS_STATIC_NODE)) |
2321 | return 0; | |
912541b0 | 2322 | |
25de7aa7 YW |
2323 | LIST_FOREACH(tokens, token, rule_line->tokens) |
2324 | if (token->type == TK_A_OWNER_ID) | |
2325 | uid = PTR_TO_UID(token->data); | |
2326 | else if (token->type == TK_A_GROUP_ID) | |
2327 | gid = PTR_TO_GID(token->data); | |
2328 | else if (token->type == TK_A_MODE_ID) | |
2329 | mode = PTR_TO_MODE(token->data); | |
2330 | else if (token->type == TK_A_TAG) { | |
2331 | r = strv_extend(&tags, token->value); | |
2332 | if (r < 0) | |
2333 | return log_oom(); | |
2334 | } else if (token->type == TK_A_OPTIONS_STATIC_NODE) { | |
2335 | r = apply_static_dev_perms(token->value, uid, gid, mode, tags); | |
2336 | if (r < 0) | |
2337 | return r; | |
912541b0 KS |
2338 | } |
2339 | ||
25de7aa7 YW |
2340 | return 0; |
2341 | } | |
2342 | ||
2343 | int udev_rules_apply_static_dev_perms(UdevRules *rules) { | |
2344 | UdevRuleFile *file; | |
2345 | UdevRuleLine *line; | |
2346 | int r; | |
2347 | ||
2348 | assert(rules); | |
84b6ad70 | 2349 | |
25de7aa7 YW |
2350 | LIST_FOREACH(rule_files, file, rules->rule_files) |
2351 | LIST_FOREACH(rule_lines, line, file->rule_lines) { | |
2352 | r = udev_rule_line_apply_static_dev_perms(line); | |
2353 | if (r < 0) | |
2354 | return r; | |
84b6ad70 | 2355 | } |
84b6ad70 | 2356 | |
fdd21be6 | 2357 | return 0; |
761dfddc | 2358 | } |