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1 | /* SPDX-License-Identifier: GPL-2.0-or-later */ | |
2 | ||
3 | #include <ctype.h> | |
4 | #include <fnmatch.h> | |
5 | #include <unistd.h> | |
6 | ||
7 | #include "sd-json.h" | |
8 | ||
9 | #include "alloc-util.h" | |
10 | #include "architecture.h" | |
11 | #include "chase.h" | |
12 | #include "conf-files.h" | |
13 | #include "conf-parser.h" | |
14 | #include "confidential-virt.h" | |
15 | #include "constants.h" | |
16 | #include "device-private.h" | |
17 | #include "device-util.h" | |
18 | #include "dirent-util.h" | |
19 | #include "errno-util.h" | |
20 | #include "escape.h" | |
21 | #include "extract-word.h" | |
22 | #include "fd-util.h" | |
23 | #include "fileio.h" | |
24 | #include "format-util.h" | |
25 | #include "fs-util.h" | |
26 | #include "glob-util.h" | |
27 | #include "hashmap.h" | |
28 | #include "list.h" | |
29 | #include "memstream-util.h" | |
30 | #include "netif-naming-scheme.h" | |
31 | #include "nulstr-util.h" | |
32 | #include "parse-util.h" | |
33 | #include "path-util.h" | |
34 | #include "proc-cmdline.h" | |
35 | #include "socket-util.h" | |
36 | #include "stat-util.h" | |
37 | #include "string-table.h" | |
38 | #include "string-util.h" | |
39 | #include "strv.h" | |
40 | #include "strxcpyx.h" | |
41 | #include "sysctl-util.h" | |
42 | #include "syslog-util.h" | |
43 | #include "udev-builtin.h" | |
44 | #include "udev-dump.h" | |
45 | #include "udev-event.h" | |
46 | #include "udev-format.h" | |
47 | #include "udev-node.h" | |
48 | #include "udev-rules.h" | |
49 | #include "udev-spawn.h" | |
50 | #include "udev-trace.h" | |
51 | #include "udev-util.h" | |
52 | #include "udev-worker.h" | |
53 | #include "user-record.h" | |
54 | #include "user-util.h" | |
55 | #include "userdb.h" | |
56 | #include "virt.h" | |
57 | ||
58 | #define RULES_DIRS ((const char* const*) CONF_PATHS_STRV("udev/rules.d")) | |
59 | ||
60 | typedef enum { | |
61 | OP_MATCH, /* == */ | |
62 | OP_NOMATCH, /* != */ | |
63 | OP_ADD, /* += */ | |
64 | OP_REMOVE, /* -= */ | |
65 | OP_ASSIGN, /* = */ | |
66 | OP_ASSIGN_FINAL, /* := */ | |
67 | _OP_TYPE_MAX, | |
68 | _OP_TYPE_INVALID = -EINVAL, | |
69 | } UdevRuleOperatorType; | |
70 | ||
71 | typedef enum { | |
72 | MATCH_TYPE_EMPTY, /* empty string */ | |
73 | MATCH_TYPE_PLAIN, /* no special characters */ | |
74 | MATCH_TYPE_PLAIN_WITH_EMPTY, /* no special characters with empty string, e.g., "|foo" */ | |
75 | MATCH_TYPE_GLOB, /* shell globs ?,*,[] */ | |
76 | MATCH_TYPE_GLOB_WITH_EMPTY, /* shell globs ?,*,[] with empty string, e.g., "|foo*" */ | |
77 | MATCH_TYPE_SUBSYSTEM, /* "subsystem", "bus", or "class" */ | |
78 | _MATCH_TYPE_MAX, | |
79 | ||
80 | _MATCH_TYPE_MASK = (1 << 5) - 1, | |
81 | MATCH_REMOVE_TRAILING_WHITESPACE = 1 << 5, /* Remove trailing whitespaces in attribute */ | |
82 | MATCH_CASE_INSENSITIVE = 1 << 6, /* string or pattern is matched case-insensitively */ | |
83 | _MATCH_TYPE_INVALID = -EINVAL, | |
84 | } UdevRuleMatchType; | |
85 | ||
86 | assert_cc(_MATCH_TYPE_MAX <= _MATCH_TYPE_MASK); | |
87 | ||
88 | typedef enum { | |
89 | SUBST_TYPE_PLAIN, /* no substitution */ | |
90 | SUBST_TYPE_FORMAT, /* % or $ */ | |
91 | SUBST_TYPE_SUBSYS, /* "[<SUBSYSTEM>/<KERNEL>]<attribute>" format */ | |
92 | _SUBST_TYPE_MAX, | |
93 | _SUBST_TYPE_INVALID = -EINVAL, | |
94 | } UdevRuleSubstituteType; | |
95 | ||
96 | typedef enum { | |
97 | /* lvalues which take match or nomatch operator */ | |
98 | TK_M_ACTION, /* string, device_get_action() */ | |
99 | TK_M_DEVPATH, /* path, sd_device_get_devpath() */ | |
100 | TK_M_KERNEL, /* string, sd_device_get_sysname() */ | |
101 | TK_M_DEVLINK, /* strv, sd_device_get_devlink_first(), sd_device_get_devlink_next() */ | |
102 | TK_M_NAME, /* string, name of network interface */ | |
103 | TK_M_ENV, /* string, device property, takes key through attribute */ | |
104 | TK_M_CONST, /* string, system-specific hard-coded constant */ | |
105 | TK_M_TAG, /* strv, sd_device_get_tag_first(), sd_device_get_tag_next() */ | |
106 | TK_M_SUBSYSTEM, /* string, sd_device_get_subsystem() */ | |
107 | TK_M_DRIVER, /* string, sd_device_get_driver() */ | |
108 | TK_M_ATTR, /* string, takes filename through attribute, sd_device_get_sysattr_value(), udev_resolve_subsys_kernel(), etc. */ | |
109 | TK_M_SYSCTL, /* string, takes kernel parameter through attribute */ | |
110 | ||
111 | /* matches parent parameters */ | |
112 | TK_M_PARENTS_KERNEL, /* string */ | |
113 | TK_M_PARENTS_SUBSYSTEM, /* string */ | |
114 | TK_M_PARENTS_DRIVER, /* string */ | |
115 | TK_M_PARENTS_ATTR, /* string */ | |
116 | TK_M_PARENTS_TAG, /* strv */ | |
117 | ||
118 | TK_M_TEST, /* path, optionally mode_t can be specified by attribute, test the existence of a file */ | |
119 | TK_M_PROGRAM, /* string, execute a program */ | |
120 | TK_M_IMPORT_FILE, /* path */ | |
121 | TK_M_IMPORT_PROGRAM, /* string, import properties from the result of program */ | |
122 | TK_M_IMPORT_BUILTIN, /* string, import properties from the result of built-in command */ | |
123 | TK_M_IMPORT_DB, /* string, import properties from database */ | |
124 | TK_M_IMPORT_CMDLINE, /* string, kernel command line */ | |
125 | TK_M_IMPORT_PARENT, /* string, parent property */ | |
126 | TK_M_RESULT, /* string, result of TK_M_PROGRAM */ | |
127 | ||
128 | #define _TK_M_MAX (TK_M_RESULT + 1) | |
129 | #define _TK_A_MIN _TK_M_MAX | |
130 | ||
131 | /* lvalues which take one of assign operators */ | |
132 | TK_A_OPTIONS_DUMP, /* no argument */ | |
133 | TK_A_OPTIONS_STRING_ESCAPE_NONE, /* no argument */ | |
134 | TK_A_OPTIONS_STRING_ESCAPE_REPLACE, /* no argument */ | |
135 | TK_A_OPTIONS_DB_PERSIST, /* no argument */ | |
136 | TK_A_OPTIONS_INOTIFY_WATCH, /* boolean */ | |
137 | TK_A_OPTIONS_DEVLINK_PRIORITY, /* int */ | |
138 | TK_A_OPTIONS_LOG_LEVEL, /* string of log level or "reset" */ | |
139 | TK_A_OWNER, /* user name */ | |
140 | TK_A_GROUP, /* group name */ | |
141 | TK_A_MODE, /* mode string */ | |
142 | TK_A_OWNER_ID, /* uid_t */ | |
143 | TK_A_GROUP_ID, /* gid_t */ | |
144 | TK_A_MODE_ID, /* mode_t */ | |
145 | TK_A_TAG, /* string */ | |
146 | TK_A_OPTIONS_STATIC_NODE, /* device path, /dev/... */ | |
147 | TK_A_SECLABEL, /* string with attribute */ | |
148 | TK_A_ENV, /* string with attribute */ | |
149 | TK_A_NAME, /* ifname */ | |
150 | TK_A_DEVLINK, /* string */ | |
151 | TK_A_ATTR, /* string with attribute */ | |
152 | TK_A_SYSCTL, /* string with attribute */ | |
153 | TK_A_RUN_BUILTIN, /* string */ | |
154 | TK_A_RUN_PROGRAM, /* string */ | |
155 | ||
156 | _TK_TYPE_MAX, | |
157 | _TK_TYPE_INVALID = -EINVAL, | |
158 | } UdevRuleTokenType; | |
159 | ||
160 | typedef enum { | |
161 | LINE_HAS_NAME = 1 << 0, /* has NAME= */ | |
162 | LINE_HAS_DEVLINK = 1 << 1, /* has SYMLINK=, OWNER=, GROUP= or MODE= */ | |
163 | LINE_HAS_STATIC_NODE = 1 << 2, /* has OPTIONS=static_node */ | |
164 | LINE_HAS_GOTO = 1 << 3, /* has GOTO= */ | |
165 | LINE_HAS_LABEL = 1 << 4, /* has LABEL= */ | |
166 | LINE_UPDATE_SOMETHING = 1 << 5, /* has other TK_A_* or TK_M_IMPORT tokens */ | |
167 | LINE_IS_REFERENCED = 1 << 6, /* is referenced by GOTO */ | |
168 | } UdevRuleLineType; | |
169 | ||
170 | typedef struct UdevRuleFile UdevRuleFile; | |
171 | typedef struct UdevRuleLine UdevRuleLine; | |
172 | typedef struct UdevRuleToken UdevRuleToken; | |
173 | ||
174 | struct UdevRuleToken { | |
175 | UdevRuleTokenType type:8; | |
176 | UdevRuleOperatorType op:8; | |
177 | UdevRuleMatchType match_type:8; | |
178 | UdevRuleSubstituteType attr_subst_type:8; | |
179 | const char *value; | |
180 | void *data; | |
181 | ||
182 | const char *token_str; /* original token string for logging */ | |
183 | ||
184 | UdevRuleLine *rule_line; | |
185 | LIST_FIELDS(UdevRuleToken, tokens); | |
186 | }; | |
187 | ||
188 | struct UdevRuleLine { | |
189 | char *line; | |
190 | char *line_for_logging; | |
191 | unsigned line_number; | |
192 | UdevRuleLineType type; | |
193 | ||
194 | const char *label; | |
195 | const char *goto_label; | |
196 | UdevRuleLine *goto_line; | |
197 | ||
198 | UdevRuleFile *rule_file; | |
199 | LIST_HEAD(UdevRuleToken, tokens); | |
200 | LIST_FIELDS(UdevRuleLine, rule_lines); | |
201 | }; | |
202 | ||
203 | struct UdevRuleFile { | |
204 | char *filename; | |
205 | unsigned issues; /* used by "udevadm verify" */ | |
206 | ||
207 | UdevRules *rules; | |
208 | LIST_HEAD(UdevRuleLine, rule_lines); | |
209 | LIST_FIELDS(UdevRuleFile, rule_files); | |
210 | }; | |
211 | ||
212 | struct UdevRules { | |
213 | ResolveNameTiming resolve_name_timing; | |
214 | Hashmap *known_users; | |
215 | Hashmap *known_groups; | |
216 | Hashmap *stats_by_path; | |
217 | LIST_HEAD(UdevRuleFile, rule_files); | |
218 | }; | |
219 | ||
220 | #define LINE_GET_RULES(line) \ | |
221 | ASSERT_PTR(ASSERT_PTR(ASSERT_PTR(line)->rule_file)->rules) | |
222 | ||
223 | static bool token_is_for_parents(UdevRuleToken *token) { | |
224 | return token->type >= TK_M_PARENTS_KERNEL && token->type <= TK_M_PARENTS_TAG; | |
225 | } | |
226 | ||
227 | /*** Logging helpers ***/ | |
228 | ||
229 | #define _log_udev_rule_file_full(device, device_u, file, file_u, line_nr, level, level_u, error, fmt, ...) \ | |
230 | ({ \ | |
231 | int level_u = (level); \ | |
232 | sd_device *device_u = (device); \ | |
233 | UdevRuleFile *file_u = (file); \ | |
234 | \ | |
235 | if (!device_u && file_u) \ | |
236 | file_u->issues |= (1U << level_u); \ | |
237 | \ | |
238 | log_device_full_errno_zerook( \ | |
239 | device_u, level_u, error, "%s:%u " fmt, \ | |
240 | strna(file_u ? file_u->filename : NULL), \ | |
241 | line_nr, ##__VA_ARGS__); \ | |
242 | }) | |
243 | ||
244 | #define log_udev_rule_file_full(device, file, line_nr, level, error, fmt, ...) \ | |
245 | _log_udev_rule_file_full(device, UNIQ_T(d, UNIQ), file, UNIQ_T(f, UNIQ), line_nr, level, UNIQ_T(l, UNIQ), error, fmt, ##__VA_ARGS__) | |
246 | ||
247 | #define _log_udev_rule_line_full(device, line, line_u, ...) \ | |
248 | ({ \ | |
249 | UdevRuleLine *line_u = ASSERT_PTR(line); \ | |
250 | \ | |
251 | log_udev_rule_file_full( \ | |
252 | device, \ | |
253 | line_u->rule_file, line_u->line_number, \ | |
254 | __VA_ARGS__); \ | |
255 | }) | |
256 | ||
257 | #define log_udev_rule_line_full(device, line, ...) \ | |
258 | _log_udev_rule_line_full(device, line, UNIQ_T(l, UNIQ), __VA_ARGS__) | |
259 | ||
260 | /* Mainly used when applying tokens to the event device. */ | |
261 | #define _log_event_full_errno_zerook(event, event_u, token, token_u, level, error, fmt, ...) \ | |
262 | ({ \ | |
263 | UdevEvent *event_u = ASSERT_PTR(event); \ | |
264 | UdevRuleToken *token_u = ASSERT_PTR(token); \ | |
265 | \ | |
266 | log_udev_rule_line_full( \ | |
267 | token_is_for_parents(token_u) ? event_u->dev_parent : event_u->dev, \ | |
268 | token_u->rule_line, \ | |
269 | level, error, "%s: " fmt, \ | |
270 | token_u->token_str, ##__VA_ARGS__); \ | |
271 | }) | |
272 | ||
273 | #define log_event_full_errno_zerook(event, token, ...) \ | |
274 | _log_event_full_errno_zerook(event, UNIQ_T(e, UNIQ), token, UNIQ_T(t, UNIQ), __VA_ARGS__) | |
275 | ||
276 | #define _log_event_full_errno(event, token, level, error, error_u, ...) \ | |
277 | ({ \ | |
278 | int error_u = (error); \ | |
279 | ASSERT_NON_ZERO(error_u); \ | |
280 | log_event_full_errno_zerook( \ | |
281 | event, token, level, error_u, \ | |
282 | __VA_ARGS__); \ | |
283 | }) | |
284 | ||
285 | #define log_event_full_errno(event, token, level, error, ...) \ | |
286 | _log_event_full_errno(event, token, level, error, UNIQ_T(e, UNIQ), __VA_ARGS__) | |
287 | ||
288 | #define log_event_full(event, token, level, ...) (void) log_event_full_errno_zerook(event, token, level, 0, __VA_ARGS__) | |
289 | ||
290 | #define log_event_debug(event, token, ...) log_event_full(event, token, LOG_DEBUG, __VA_ARGS__) | |
291 | #define log_event_info(event, token, ...) log_event_full(event, token, LOG_INFO, __VA_ARGS__) | |
292 | #define log_event_notice(event, token, ...) log_event_full(event, token, LOG_NOTICE, __VA_ARGS__) | |
293 | #define log_event_warning(event, token, ...) log_event_full(event, token, LOG_WARNING, __VA_ARGS__) | |
294 | #define log_event_error(event, token, ...) log_event_full(event, token, LOG_ERR, __VA_ARGS__) | |
295 | ||
296 | #define log_event_debug_errno(event, token, error, ...) log_event_full_errno(event, token, LOG_DEBUG, error, __VA_ARGS__) | |
297 | #define log_event_info_errno(event, token, error, ...) log_event_full_errno(event, token, LOG_INFO, error, __VA_ARGS__) | |
298 | #define log_event_notice_errno(event, token, error, ...) log_event_full_errno(event, token, LOG_NOTICE, error, __VA_ARGS__) | |
299 | #define log_event_warning_errno(event, token, error, ...) log_event_full_errno(event, token, LOG_WARNING, error, __VA_ARGS__) | |
300 | #define log_event_error_errno(event, token, error, ...) log_event_full_errno(event, token, LOG_ERR, error, __VA_ARGS__) | |
301 | ||
302 | #define _log_event_trace_errno(event, event_u, ...) \ | |
303 | ({ \ | |
304 | UdevEvent *event_u = ASSERT_PTR(event); \ | |
305 | \ | |
306 | event_u->trace ? \ | |
307 | log_event_debug_errno(event_u, __VA_ARGS__) : \ | |
308 | (void) 0; \ | |
309 | }) | |
310 | ||
311 | #define log_event_trace_errno(event, ...) \ | |
312 | _log_event_trace_errno(event, UNIQ_T(e, UNIQ), __VA_ARGS__) | |
313 | ||
314 | #define _log_event_trace(event, event_u, ...) \ | |
315 | ({ \ | |
316 | UdevEvent *event_u = ASSERT_PTR(event); \ | |
317 | \ | |
318 | event_u->trace ? \ | |
319 | log_event_debug(event_u, __VA_ARGS__) : \ | |
320 | (void) 0; \ | |
321 | }) | |
322 | ||
323 | #define log_event_trace(event, ...) \ | |
324 | _log_event_trace(event, UNIQ_T(e, UNIQ), __VA_ARGS__) | |
325 | ||
326 | #define _log_event_result(event, token, result, result_u) \ | |
327 | ({ \ | |
328 | bool result_u = (result); \ | |
329 | \ | |
330 | log_event_trace(event, token, "%s", \ | |
331 | result_u ? "PASS" : "FAIL"); \ | |
332 | result_u; \ | |
333 | }) | |
334 | ||
335 | #define log_event_result(event, token, result) \ | |
336 | _log_event_result(event, token, result, UNIQ_T(r, UNIQ)) | |
337 | ||
338 | #define log_event_done(event, token) \ | |
339 | ({ \ | |
340 | log_event_trace(event, token, "DONE"); \ | |
341 | true; \ | |
342 | }) | |
343 | ||
344 | #define _log_event_final_set(event, token, token_u) \ | |
345 | ({ \ | |
346 | UdevRuleToken *token_u = ASSERT_PTR(token); \ | |
347 | \ | |
348 | log_event_trace(event, token_u, \ | |
349 | "Already assigned final value, ignoring further %s.", \ | |
350 | token_u->op == OP_REMOVE ? "modification" : "assignment"); \ | |
351 | true; \ | |
352 | }) | |
353 | ||
354 | #define log_event_final_set(event, token) \ | |
355 | _log_event_final_set(event, token, UNIQ_T(t, UNIQ)) | |
356 | ||
357 | #define _log_event_truncated(event, token, token_u, what, format) \ | |
358 | ({ \ | |
359 | UdevRuleToken *token_u = ASSERT_PTR(token); \ | |
360 | \ | |
361 | token_u->type < _TK_M_MAX ? \ | |
362 | log_event_debug(event, token_u, \ | |
363 | "The %s is truncated while substituting into \"%s\", assuming the token fails.", \ | |
364 | what, (const char*) format) : \ | |
365 | log_event_warning( \ | |
366 | event, token_u, \ | |
367 | "The %s is truncated while substituting into \"%s\", refusing to apply the token.", \ | |
368 | what, (const char*) format); \ | |
369 | }) | |
370 | ||
371 | #define log_event_truncated(event, token, what, format) \ | |
372 | _log_event_truncated(event, token, UNIQ_T(t, UNIQ), what, format) | |
373 | ||
374 | #define _log_event_line(event, event_u, line, ...) \ | |
375 | ({ \ | |
376 | UdevEvent *event_u = ASSERT_PTR(event); \ | |
377 | \ | |
378 | event_u->trace ? \ | |
379 | log_udev_rule_line_full( \ | |
380 | event_u->dev, line, \ | |
381 | LOG_DEBUG, 0, __VA_ARGS__) : \ | |
382 | 0; \ | |
383 | }) | |
384 | ||
385 | #define log_event_line(event, line, ...) \ | |
386 | _log_event_line(event, UNIQ_T(e, UNIQ), line, __VA_ARGS__) | |
387 | ||
388 | /* Mainly used when parsing .rules files. */ | |
389 | #define log_file_full_errno_zerook(...) \ | |
390 | log_udev_rule_file_full(NULL, __VA_ARGS__) | |
391 | ||
392 | #define log_file_error(file, line_nr, ...) \ | |
393 | log_file_full_errno_zerook(file, line_nr, LOG_ERR, 0, __VA_ARGS__) | |
394 | ||
395 | #define log_line_full_errno_zerook(...) \ | |
396 | log_udev_rule_line_full(NULL, __VA_ARGS__) | |
397 | ||
398 | #define log_line_full_errno(line, level, error, ...) \ | |
399 | log_udev_rule_line_full(NULL, line, level, error, __VA_ARGS__) | |
400 | ||
401 | #define log_line_full(line, level, ...) (void) log_line_full_errno_zerook(line, level, 0, __VA_ARGS__) | |
402 | ||
403 | #define log_line_debug(line, ...) log_line_full(line, LOG_DEBUG, __VA_ARGS__) | |
404 | #define log_line_info(line, ...) log_line_full(line, LOG_INFO, __VA_ARGS__) | |
405 | #define log_line_notice(line, ...) log_line_full(line, LOG_NOTICE, __VA_ARGS__) | |
406 | #define log_line_warning(line, ...) log_line_full(line, LOG_WARNING, __VA_ARGS__) | |
407 | #define log_line_error(line, ...) log_line_full(line, LOG_ERR, __VA_ARGS__) | |
408 | ||
409 | #define log_line_debug_errno(line, error, ...) log_line_full_errno(line, LOG_DEBUG, error, __VA_ARGS__) | |
410 | #define log_line_info_errno(line, error, ...) log_line_full_errno(line, LOG_INFO, error, __VA_ARGS__) | |
411 | #define log_line_notice_errno(line, error, ...) log_line_full_errno(line, LOG_NOTICE, error, __VA_ARGS__) | |
412 | #define log_line_warning_errno(line, error, ...) log_line_full_errno(line, LOG_WARNING, error, __VA_ARGS__) | |
413 | #define log_line_error_errno(line, error, ...) log_line_full_errno(line, LOG_ERR, error, __VA_ARGS__) | |
414 | ||
415 | #define _log_line_invalid_token(line, key, type) \ | |
416 | log_line_error_errno(line, SYNTHETIC_ERRNO(EINVAL), \ | |
417 | "Invalid %s for %s.", type, key) | |
418 | ||
419 | #define log_line_invalid_op(line, key) _log_line_invalid_token(line, key, "operator") | |
420 | #define log_line_invalid_attr(line, key) _log_line_invalid_token(line, key, "attribute") | |
421 | #define log_line_invalid_prefix(line, key) _log_line_invalid_token(line, key, "prefix 'i'") | |
422 | ||
423 | #define log_line_invalid_attr_format(line, key, attr, offset, hint) \ | |
424 | log_line_error_errno(line, SYNTHETIC_ERRNO(EINVAL), \ | |
425 | "Invalid attribute \"%s\" for %s (char %zu: %s), ignoring.", \ | |
426 | attr, key, offset, hint) | |
427 | #define log_line_invalid_value(line, key, value, offset, hint) \ | |
428 | log_line_error_errno(line, SYNTHETIC_ERRNO(EINVAL), \ | |
429 | "Invalid value \"%s\" for %s (char %zu: %s), ignoring.", \ | |
430 | value, key, offset, hint) | |
431 | ||
432 | /*** Other functions ***/ | |
433 | ||
434 | static UdevRuleToken* udev_rule_token_free(UdevRuleToken *token) { | |
435 | if (!token) | |
436 | return NULL; | |
437 | ||
438 | if (token->rule_line) | |
439 | LIST_REMOVE(tokens, token->rule_line->tokens, token); | |
440 | ||
441 | return mfree(token); | |
442 | } | |
443 | ||
444 | DEFINE_TRIVIAL_CLEANUP_FUNC(UdevRuleToken*, udev_rule_token_free); | |
445 | ||
446 | static void udev_rule_line_clear_tokens(UdevRuleLine *rule_line) { | |
447 | assert(rule_line); | |
448 | ||
449 | LIST_FOREACH(tokens, i, rule_line->tokens) | |
450 | udev_rule_token_free(i); | |
451 | } | |
452 | ||
453 | static UdevRuleLine* udev_rule_line_free(UdevRuleLine *rule_line) { | |
454 | if (!rule_line) | |
455 | return NULL; | |
456 | ||
457 | udev_rule_line_clear_tokens(rule_line); | |
458 | ||
459 | if (rule_line->rule_file) | |
460 | LIST_REMOVE(rule_lines, rule_line->rule_file->rule_lines, rule_line); | |
461 | ||
462 | free(rule_line->line); | |
463 | free(rule_line->line_for_logging); | |
464 | return mfree(rule_line); | |
465 | } | |
466 | ||
467 | DEFINE_TRIVIAL_CLEANUP_FUNC(UdevRuleLine*, udev_rule_line_free); | |
468 | ||
469 | static UdevRuleFile* udev_rule_file_free(UdevRuleFile *rule_file) { | |
470 | if (!rule_file) | |
471 | return NULL; | |
472 | ||
473 | LIST_FOREACH(rule_lines, i, rule_file->rule_lines) | |
474 | udev_rule_line_free(i); | |
475 | ||
476 | if (rule_file->rules) | |
477 | LIST_REMOVE(rule_files, rule_file->rules->rule_files, rule_file); | |
478 | ||
479 | free(rule_file->filename); | |
480 | return mfree(rule_file); | |
481 | } | |
482 | ||
483 | DEFINE_TRIVIAL_CLEANUP_FUNC(UdevRuleFile*, udev_rule_file_free); | |
484 | ||
485 | UdevRules* udev_rules_free(UdevRules *rules) { | |
486 | if (!rules) | |
487 | return NULL; | |
488 | ||
489 | LIST_FOREACH(rule_files, i, rules->rule_files) | |
490 | udev_rule_file_free(i); | |
491 | ||
492 | hashmap_free(rules->known_users); | |
493 | hashmap_free(rules->known_groups); | |
494 | hashmap_free(rules->stats_by_path); | |
495 | return mfree(rules); | |
496 | } | |
497 | ||
498 | static int rule_resolve_user(UdevRuleLine *rule_line, const char *name, uid_t *ret) { | |
499 | Hashmap **known_users = &LINE_GET_RULES(rule_line)->known_users; | |
500 | int r; | |
501 | ||
502 | assert(name); | |
503 | assert(ret); | |
504 | ||
505 | void *val = hashmap_get(*known_users, name); | |
506 | if (val) { | |
507 | *ret = PTR_TO_UID(val); | |
508 | return 0; | |
509 | } | |
510 | ||
511 | _cleanup_(user_record_unrefp) UserRecord *ur = NULL; | |
512 | r = userdb_by_name(name, &USERDB_MATCH_ROOT_AND_SYSTEM, | |
513 | USERDB_SUPPRESS_SHADOW | USERDB_PARSE_NUMERIC | USERDB_SYNTHESIZE_NUMERIC, | |
514 | &ur); | |
515 | if (r == -ESRCH) | |
516 | return log_line_error_errno(rule_line, r, "Unknown user '%s', ignoring.", name); | |
517 | if (r == -ENOEXEC) | |
518 | return log_line_error_errno(rule_line, r, "User '%s' is not a system user, ignoring.", name); | |
519 | if (r < 0) | |
520 | return log_line_error_errno(rule_line, r, "Failed to resolve user '%s', ignoring: %m", name); | |
521 | ||
522 | _cleanup_free_ char *n = strdup(name); | |
523 | if (!n) | |
524 | return log_oom(); | |
525 | ||
526 | r = hashmap_ensure_put(known_users, &string_hash_ops_free, n, UID_TO_PTR(ur->uid)); | |
527 | if (r < 0) | |
528 | return log_oom(); | |
529 | ||
530 | TAKE_PTR(n); | |
531 | *ret = ur->uid; | |
532 | return 0; | |
533 | } | |
534 | ||
535 | static int rule_resolve_group(UdevRuleLine *rule_line, const char *name, gid_t *ret) { | |
536 | Hashmap **known_groups = &LINE_GET_RULES(rule_line)->known_groups; | |
537 | int r; | |
538 | ||
539 | assert(name); | |
540 | assert(ret); | |
541 | ||
542 | void *val = hashmap_get(*known_groups, name); | |
543 | if (val) { | |
544 | *ret = PTR_TO_GID(val); | |
545 | return 0; | |
546 | } | |
547 | ||
548 | _cleanup_(group_record_unrefp) GroupRecord *gr = NULL; | |
549 | r = groupdb_by_name(name, &USERDB_MATCH_ROOT_AND_SYSTEM, | |
550 | USERDB_SUPPRESS_SHADOW | USERDB_PARSE_NUMERIC | USERDB_SYNTHESIZE_NUMERIC, | |
551 | &gr); | |
552 | if (r == -ESRCH) | |
553 | return log_line_error_errno(rule_line, r, "Unknown group '%s', ignoring.", name); | |
554 | if (r == -ENOEXEC) | |
555 | return log_line_error_errno(rule_line, r, "Group '%s' is not a system group, ignoring.", name); | |
556 | if (r < 0) | |
557 | return log_line_error_errno(rule_line, r, "Failed to resolve group '%s', ignoring: %m", name); | |
558 | ||
559 | _cleanup_free_ char *n = strdup(name); | |
560 | if (!n) | |
561 | return log_oom(); | |
562 | ||
563 | r = hashmap_ensure_put(known_groups, &string_hash_ops_free, n, GID_TO_PTR(gr->gid)); | |
564 | if (r < 0) | |
565 | return log_oom(); | |
566 | ||
567 | TAKE_PTR(n); | |
568 | *ret = gr->gid; | |
569 | return 0; | |
570 | } | |
571 | ||
572 | static UdevRuleSubstituteType rule_get_substitution_type(const char *str) { | |
573 | assert(str); | |
574 | ||
575 | if (str[0] == '[') | |
576 | return SUBST_TYPE_SUBSYS; | |
577 | if (strchr(str, '%') || strchr(str, '$')) | |
578 | return SUBST_TYPE_FORMAT; | |
579 | return SUBST_TYPE_PLAIN; | |
580 | } | |
581 | ||
582 | static bool type_has_nulstr_value(UdevRuleTokenType type) { | |
583 | return type < TK_M_TEST || type == TK_M_RESULT; | |
584 | } | |
585 | ||
586 | static int rule_line_add_token( | |
587 | UdevRuleLine *rule_line, | |
588 | UdevRuleTokenType type, | |
589 | UdevRuleOperatorType op, | |
590 | char *value, | |
591 | void *data, | |
592 | bool is_case_insensitive, | |
593 | const char *token_str) { | |
594 | ||
595 | _cleanup_(udev_rule_token_freep) UdevRuleToken *token = NULL; | |
596 | UdevRuleMatchType match_type = _MATCH_TYPE_INVALID; | |
597 | UdevRuleSubstituteType subst_type = _SUBST_TYPE_INVALID; | |
598 | ||
599 | assert(rule_line); | |
600 | assert(type >= 0 && type < _TK_TYPE_MAX); | |
601 | assert(op >= 0 && op < _OP_TYPE_MAX); | |
602 | ||
603 | if (type < _TK_M_MAX) { | |
604 | assert(value); | |
605 | assert(IN_SET(op, OP_MATCH, OP_NOMATCH)); | |
606 | ||
607 | if (type == TK_M_SUBSYSTEM && STR_IN_SET(value, "subsystem", "bus", "class")) | |
608 | match_type = MATCH_TYPE_SUBSYSTEM; | |
609 | else if (isempty(value)) | |
610 | match_type = MATCH_TYPE_EMPTY; | |
611 | else if (streq(value, "?*")) { | |
612 | /* Convert KEY=="?*" -> KEY!="" */ | |
613 | match_type = MATCH_TYPE_EMPTY; | |
614 | op = op == OP_MATCH ? OP_NOMATCH : OP_MATCH; | |
615 | } else if (string_is_glob(value)) | |
616 | match_type = MATCH_TYPE_GLOB; | |
617 | else | |
618 | match_type = MATCH_TYPE_PLAIN; | |
619 | ||
620 | if (type_has_nulstr_value(type)) { | |
621 | /* Convert value string to nulstr. */ | |
622 | bool bar = true, empty = false; | |
623 | char *a, *b; | |
624 | ||
625 | for (a = b = value; *a != '\0'; a++) { | |
626 | if (*a != '|') { | |
627 | *b++ = *a; | |
628 | bar = false; | |
629 | } else { | |
630 | if (bar) | |
631 | empty = true; | |
632 | else | |
633 | *b++ = '\0'; | |
634 | bar = true; | |
635 | } | |
636 | } | |
637 | *b = '\0'; | |
638 | ||
639 | /* Make sure the value is end, so NULSTR_FOREACH can read correct match */ | |
640 | if (b < a) | |
641 | b[1] = '\0'; | |
642 | ||
643 | if (bar) | |
644 | empty = true; | |
645 | ||
646 | if (empty) { | |
647 | if (match_type == MATCH_TYPE_GLOB) | |
648 | match_type = MATCH_TYPE_GLOB_WITH_EMPTY; | |
649 | if (match_type == MATCH_TYPE_PLAIN) | |
650 | match_type = MATCH_TYPE_PLAIN_WITH_EMPTY; | |
651 | } | |
652 | } | |
653 | } | |
654 | ||
655 | if (IN_SET(type, TK_M_ATTR, TK_M_PARENTS_ATTR)) { | |
656 | size_t len; | |
657 | ||
658 | assert(value); | |
659 | assert(data); | |
660 | assert(match_type >= 0 && match_type < _MATCH_TYPE_MAX); | |
661 | ||
662 | len = strlen(value); | |
663 | if (len > 0 && !isspace(value[len - 1])) | |
664 | match_type |= MATCH_REMOVE_TRAILING_WHITESPACE; | |
665 | ||
666 | subst_type = rule_get_substitution_type(data); | |
667 | } | |
668 | ||
669 | SET_FLAG(match_type, MATCH_CASE_INSENSITIVE, is_case_insensitive); | |
670 | ||
671 | token = new(UdevRuleToken, 1); | |
672 | if (!token) | |
673 | return -ENOMEM; | |
674 | ||
675 | *token = (UdevRuleToken) { | |
676 | .type = type, | |
677 | .op = op, | |
678 | .value = value, | |
679 | .data = data, | |
680 | .match_type = match_type, | |
681 | .attr_subst_type = subst_type, | |
682 | .token_str = token_str, | |
683 | .rule_line = rule_line, | |
684 | }; | |
685 | ||
686 | LIST_APPEND(tokens, rule_line->tokens, token); | |
687 | ||
688 | if (token->type == TK_A_NAME) | |
689 | SET_FLAG(rule_line->type, LINE_HAS_NAME, true); | |
690 | ||
691 | else if (IN_SET(token->type, TK_A_DEVLINK, | |
692 | TK_A_OWNER, TK_A_GROUP, TK_A_MODE, | |
693 | TK_A_OWNER_ID, TK_A_GROUP_ID, TK_A_MODE_ID)) | |
694 | SET_FLAG(rule_line->type, LINE_HAS_DEVLINK, true); | |
695 | ||
696 | else if (token->type == TK_A_OPTIONS_STATIC_NODE) | |
697 | SET_FLAG(rule_line->type, LINE_HAS_STATIC_NODE, true); | |
698 | ||
699 | else if (token->type >= _TK_A_MIN || | |
700 | IN_SET(token->type, TK_M_PROGRAM, | |
701 | TK_M_IMPORT_FILE, TK_M_IMPORT_PROGRAM, TK_M_IMPORT_BUILTIN, | |
702 | TK_M_IMPORT_DB, TK_M_IMPORT_CMDLINE, TK_M_IMPORT_PARENT)) | |
703 | SET_FLAG(rule_line->type, LINE_UPDATE_SOMETHING, true); | |
704 | ||
705 | TAKE_PTR(token); | |
706 | return 0; | |
707 | } | |
708 | ||
709 | static void check_value_format_and_warn(UdevRuleLine *line, const char *key, const char *value, bool nonempty) { | |
710 | size_t offset; | |
711 | const char *hint; | |
712 | ||
713 | if (nonempty && isempty(value)) | |
714 | log_line_invalid_value(line, key, value, (size_t) 0, "empty value"); | |
715 | else if (udev_check_format(value, &offset, &hint) < 0) | |
716 | log_line_invalid_value(line, key, value, offset + 1, hint); | |
717 | } | |
718 | ||
719 | static int check_attr_format_and_warn(UdevRuleLine *line, const char *key, const char *value) { | |
720 | size_t offset; | |
721 | const char *hint; | |
722 | ||
723 | if (isempty(value)) | |
724 | return log_line_invalid_attr(line, key); | |
725 | if (udev_check_format(value, &offset, &hint) < 0) | |
726 | log_line_invalid_attr_format(line, key, value, offset + 1, hint); | |
727 | return 0; | |
728 | } | |
729 | ||
730 | static int parse_token( | |
731 | UdevRuleLine *rule_line, | |
732 | const char *key, | |
733 | char *attr, | |
734 | UdevRuleOperatorType op, | |
735 | char *value, | |
736 | bool is_case_insensitive, | |
737 | const char *token_str) { | |
738 | ||
739 | ResolveNameTiming resolve_name_timing = LINE_GET_RULES(rule_line)->resolve_name_timing; | |
740 | bool is_match = IN_SET(op, OP_MATCH, OP_NOMATCH); | |
741 | int r; | |
742 | ||
743 | assert(key); | |
744 | assert(value); | |
745 | ||
746 | if (!is_match && is_case_insensitive) | |
747 | return log_line_error_errno(rule_line, SYNTHETIC_ERRNO(EINVAL), | |
748 | "Invalid prefix 'i' for '%s'. The 'i' prefix can be specified only for '==' or '!=' operator.", key); | |
749 | ||
750 | if (streq(key, "ACTION")) { | |
751 | if (attr) | |
752 | return log_line_invalid_attr(rule_line, key); | |
753 | if (!is_match) | |
754 | return log_line_invalid_op(rule_line, key); | |
755 | ||
756 | r = rule_line_add_token(rule_line, TK_M_ACTION, op, value, NULL, is_case_insensitive, token_str); | |
757 | } else if (streq(key, "DEVPATH")) { | |
758 | if (attr) | |
759 | return log_line_invalid_attr(rule_line, key); | |
760 | if (!is_match) | |
761 | return log_line_invalid_op(rule_line, key); | |
762 | ||
763 | r = rule_line_add_token(rule_line, TK_M_DEVPATH, op, value, NULL, is_case_insensitive, token_str); | |
764 | } else if (streq(key, "KERNEL")) { | |
765 | if (attr) | |
766 | return log_line_invalid_attr(rule_line, key); | |
767 | if (!is_match) | |
768 | return log_line_invalid_op(rule_line, key); | |
769 | ||
770 | r = rule_line_add_token(rule_line, TK_M_KERNEL, op, value, NULL, is_case_insensitive, token_str); | |
771 | } else if (streq(key, "SYMLINK")) { | |
772 | if (attr) | |
773 | return log_line_invalid_attr(rule_line, key); | |
774 | if (!is_match) { | |
775 | check_value_format_and_warn(rule_line, key, value, false); | |
776 | r = rule_line_add_token(rule_line, TK_A_DEVLINK, op, value, NULL, /* is_case_insensitive = */ false, token_str); | |
777 | } else | |
778 | r = rule_line_add_token(rule_line, TK_M_DEVLINK, op, value, NULL, is_case_insensitive, token_str); | |
779 | } else if (streq(key, "NAME")) { | |
780 | if (attr) | |
781 | return log_line_invalid_attr(rule_line, key); | |
782 | if (op == OP_REMOVE) | |
783 | return log_line_invalid_op(rule_line, key); | |
784 | if (op == OP_ADD) { | |
785 | log_line_warning(rule_line, "%s key takes '==', '!=', '=', or ':=' operator, assuming '='.", key); | |
786 | op = OP_ASSIGN; | |
787 | } | |
788 | ||
789 | if (!is_match) { | |
790 | if (streq(value, "%k")) | |
791 | return log_line_error_errno(rule_line, SYNTHETIC_ERRNO(EINVAL), | |
792 | "Ignoring NAME=\"%%k\", as it will take no effect."); | |
793 | if (isempty(value)) | |
794 | return log_line_error_errno(rule_line, SYNTHETIC_ERRNO(EINVAL), | |
795 | "Ignoring NAME=\"\", as udev will not delete any network interfaces."); | |
796 | check_value_format_and_warn(rule_line, key, value, false); | |
797 | ||
798 | r = rule_line_add_token(rule_line, TK_A_NAME, op, value, NULL, /* is_case_insensitive = */ false, token_str); | |
799 | } else | |
800 | r = rule_line_add_token(rule_line, TK_M_NAME, op, value, NULL, is_case_insensitive, token_str); | |
801 | } else if (streq(key, "ENV")) { | |
802 | if (isempty(attr)) | |
803 | return log_line_invalid_attr(rule_line, key); | |
804 | if (op == OP_REMOVE) | |
805 | return log_line_invalid_op(rule_line, key); | |
806 | if (op == OP_ASSIGN_FINAL) { | |
807 | log_line_warning(rule_line, "%s key takes '==', '!=', '=', or '+=' operator, assuming '='.", key); | |
808 | op = OP_ASSIGN; | |
809 | } | |
810 | ||
811 | if (!is_match) { | |
812 | if (!device_property_can_set(attr)) | |
813 | return log_line_error_errno(rule_line, SYNTHETIC_ERRNO(EINVAL), | |
814 | "Invalid ENV attribute. '%s' cannot be set.", attr); | |
815 | ||
816 | check_value_format_and_warn(rule_line, key, value, false); | |
817 | ||
818 | r = rule_line_add_token(rule_line, TK_A_ENV, op, value, attr, /* is_case_insensitive = */ false, token_str); | |
819 | } else | |
820 | r = rule_line_add_token(rule_line, TK_M_ENV, op, value, attr, is_case_insensitive, token_str); | |
821 | } else if (streq(key, "CONST")) { | |
822 | if (isempty(attr) || !STR_IN_SET(attr, "arch", "virt")) | |
823 | return log_line_invalid_attr(rule_line, key); | |
824 | if (!is_match) | |
825 | return log_line_invalid_op(rule_line, key); | |
826 | r = rule_line_add_token(rule_line, TK_M_CONST, op, value, attr, is_case_insensitive, token_str); | |
827 | } else if (streq(key, "TAG")) { | |
828 | if (attr) | |
829 | return log_line_invalid_attr(rule_line, key); | |
830 | if (op == OP_ASSIGN_FINAL) { | |
831 | log_line_warning(rule_line, "%s key takes '==', '!=', '=', or '+=' operator, assuming '='.", key); | |
832 | op = OP_ASSIGN; | |
833 | } | |
834 | ||
835 | if (!is_match) { | |
836 | check_value_format_and_warn(rule_line, key, value, true); | |
837 | ||
838 | r = rule_line_add_token(rule_line, TK_A_TAG, op, value, NULL, /* is_case_insensitive = */ false, token_str); | |
839 | } else | |
840 | r = rule_line_add_token(rule_line, TK_M_TAG, op, value, NULL, is_case_insensitive, token_str); | |
841 | } else if (streq(key, "SUBSYSTEM")) { | |
842 | if (attr) | |
843 | return log_line_invalid_attr(rule_line, key); | |
844 | if (!is_match) | |
845 | return log_line_invalid_op(rule_line, key); | |
846 | ||
847 | if (STR_IN_SET(value, "bus", "class")) | |
848 | log_line_warning(rule_line, "\"%s\" must be specified as \"subsystem\".", value); | |
849 | ||
850 | r = rule_line_add_token(rule_line, TK_M_SUBSYSTEM, op, value, NULL, is_case_insensitive, token_str); | |
851 | } else if (streq(key, "DRIVER")) { | |
852 | if (attr) | |
853 | return log_line_invalid_attr(rule_line, key); | |
854 | if (!is_match) | |
855 | return log_line_invalid_op(rule_line, key); | |
856 | ||
857 | r = rule_line_add_token(rule_line, TK_M_DRIVER, op, value, NULL, is_case_insensitive, token_str); | |
858 | } else if (streq(key, "ATTR")) { | |
859 | r = check_attr_format_and_warn(rule_line, key, attr); | |
860 | if (r < 0) | |
861 | return r; | |
862 | if (op == OP_REMOVE) | |
863 | return log_line_invalid_op(rule_line, key); | |
864 | if (IN_SET(op, OP_ADD, OP_ASSIGN_FINAL)) { | |
865 | log_line_warning(rule_line, "%s key takes '==', '!=', or '=' operator, assuming '='.", key); | |
866 | op = OP_ASSIGN; | |
867 | } | |
868 | ||
869 | if (!is_match) { | |
870 | check_value_format_and_warn(rule_line, key, value, false); | |
871 | r = rule_line_add_token(rule_line, TK_A_ATTR, op, value, attr, /* is_case_insensitive = */ false, token_str); | |
872 | } else | |
873 | r = rule_line_add_token(rule_line, TK_M_ATTR, op, value, attr, is_case_insensitive, token_str); | |
874 | } else if (streq(key, "SYSCTL")) { | |
875 | r = check_attr_format_and_warn(rule_line, key, attr); | |
876 | if (r < 0) | |
877 | return r; | |
878 | if (op == OP_REMOVE) | |
879 | return log_line_invalid_op(rule_line, key); | |
880 | if (IN_SET(op, OP_ADD, OP_ASSIGN_FINAL)) { | |
881 | log_line_warning(rule_line, "%s key takes '==', '!=', or '=' operator, assuming '='.", key); | |
882 | op = OP_ASSIGN; | |
883 | } | |
884 | ||
885 | if (!is_match) { | |
886 | check_value_format_and_warn(rule_line, key, value, false); | |
887 | r = rule_line_add_token(rule_line, TK_A_SYSCTL, op, value, attr, /* is_case_insensitive = */ false, token_str); | |
888 | } else | |
889 | r = rule_line_add_token(rule_line, TK_M_SYSCTL, op, value, attr, is_case_insensitive, token_str); | |
890 | } else if (streq(key, "KERNELS")) { | |
891 | if (attr) | |
892 | return log_line_invalid_attr(rule_line, key); | |
893 | if (!is_match) | |
894 | return log_line_invalid_op(rule_line, key); | |
895 | ||
896 | r = rule_line_add_token(rule_line, TK_M_PARENTS_KERNEL, op, value, NULL, is_case_insensitive, token_str); | |
897 | } else if (streq(key, "SUBSYSTEMS")) { | |
898 | if (attr) | |
899 | return log_line_invalid_attr(rule_line, key); | |
900 | if (!is_match) | |
901 | return log_line_invalid_op(rule_line, key); | |
902 | ||
903 | r = rule_line_add_token(rule_line, TK_M_PARENTS_SUBSYSTEM, op, value, NULL, is_case_insensitive, token_str); | |
904 | } else if (streq(key, "DRIVERS")) { | |
905 | if (attr) | |
906 | return log_line_invalid_attr(rule_line, key); | |
907 | if (!is_match) | |
908 | return log_line_invalid_op(rule_line, key); | |
909 | ||
910 | r = rule_line_add_token(rule_line, TK_M_PARENTS_DRIVER, op, value, NULL, is_case_insensitive, token_str); | |
911 | } else if (streq(key, "ATTRS")) { | |
912 | r = check_attr_format_and_warn(rule_line, key, attr); | |
913 | if (r < 0) | |
914 | return r; | |
915 | if (!is_match) | |
916 | return log_line_invalid_op(rule_line, key); | |
917 | ||
918 | if (startswith(attr, "device/")) | |
919 | log_line_warning(rule_line, "'device' link may not be available in future kernels."); | |
920 | if (strstr(attr, "../")) | |
921 | log_line_warning(rule_line, "Direct reference to parent sysfs directory, may break in future kernels."); | |
922 | ||
923 | r = rule_line_add_token(rule_line, TK_M_PARENTS_ATTR, op, value, attr, is_case_insensitive, token_str); | |
924 | } else if (streq(key, "TAGS")) { | |
925 | if (attr) | |
926 | return log_line_invalid_attr(rule_line, key); | |
927 | if (!is_match) | |
928 | return log_line_invalid_op(rule_line, key); | |
929 | ||
930 | r = rule_line_add_token(rule_line, TK_M_PARENTS_TAG, op, value, NULL, is_case_insensitive, token_str); | |
931 | } else if (streq(key, "TEST")) { | |
932 | mode_t mode = MODE_INVALID; | |
933 | ||
934 | if (!isempty(attr)) { | |
935 | r = parse_mode(attr, &mode); | |
936 | if (r < 0) | |
937 | return log_line_error_errno(rule_line, r, "Failed to parse mode '%s': %m", attr); | |
938 | } | |
939 | check_value_format_and_warn(rule_line, key, value, true); | |
940 | if (!is_match) | |
941 | return log_line_invalid_op(rule_line, key); | |
942 | if (is_case_insensitive) | |
943 | return log_line_invalid_prefix(rule_line, key); | |
944 | ||
945 | r = rule_line_add_token(rule_line, TK_M_TEST, op, value, MODE_TO_PTR(mode), is_case_insensitive, token_str); | |
946 | } else if (streq(key, "PROGRAM")) { | |
947 | if (attr) | |
948 | return log_line_invalid_attr(rule_line, key); | |
949 | check_value_format_and_warn(rule_line, key, value, true); | |
950 | if (op == OP_REMOVE) | |
951 | return log_line_invalid_op(rule_line, key); | |
952 | if (!is_match) | |
953 | op = OP_MATCH; | |
954 | if (is_case_insensitive) | |
955 | return log_line_invalid_prefix(rule_line, key); | |
956 | ||
957 | r = rule_line_add_token(rule_line, TK_M_PROGRAM, op, value, NULL, /* is_case_insensitive */ false, token_str); | |
958 | } else if (streq(key, "IMPORT")) { | |
959 | if (isempty(attr)) | |
960 | return log_line_invalid_attr(rule_line, key); | |
961 | check_value_format_and_warn(rule_line, key, value, true); | |
962 | if (op == OP_REMOVE) | |
963 | return log_line_invalid_op(rule_line, key); | |
964 | if (!is_match) | |
965 | op = OP_MATCH; | |
966 | if (is_case_insensitive) | |
967 | return log_line_invalid_prefix(rule_line, key); | |
968 | ||
969 | if (streq(attr, "file")) | |
970 | r = rule_line_add_token(rule_line, TK_M_IMPORT_FILE, op, value, NULL, /* is_case_insensitive = */ false, token_str); | |
971 | else if (streq(attr, "program")) { | |
972 | UdevBuiltinCommand cmd; | |
973 | ||
974 | cmd = udev_builtin_lookup(value); | |
975 | if (cmd >= 0) { | |
976 | log_line_debug(rule_line, "Found builtin command '%s' for %s, replacing attribute.", value, key); | |
977 | r = rule_line_add_token(rule_line, TK_M_IMPORT_BUILTIN, op, value, UDEV_BUILTIN_CMD_TO_PTR(cmd), /* is_case_insensitive = */ false, token_str); | |
978 | } else | |
979 | r = rule_line_add_token(rule_line, TK_M_IMPORT_PROGRAM, op, value, NULL, /* is_case_insensitive = */ false, token_str); | |
980 | } else if (streq(attr, "builtin")) { | |
981 | UdevBuiltinCommand cmd; | |
982 | ||
983 | cmd = udev_builtin_lookup(value); | |
984 | if (cmd < 0) | |
985 | return log_line_error_errno(rule_line, SYNTHETIC_ERRNO(EINVAL), | |
986 | "Unknown builtin command: %s", value); | |
987 | r = rule_line_add_token(rule_line, TK_M_IMPORT_BUILTIN, op, value, UDEV_BUILTIN_CMD_TO_PTR(cmd), /* is_case_insensitive = */ false, token_str); | |
988 | } else if (streq(attr, "db")) | |
989 | r = rule_line_add_token(rule_line, TK_M_IMPORT_DB, op, value, NULL, /* is_case_insensitive = */ false, token_str); | |
990 | else if (streq(attr, "cmdline")) | |
991 | r = rule_line_add_token(rule_line, TK_M_IMPORT_CMDLINE, op, value, NULL, /* is_case_insensitive = */ false, token_str); | |
992 | else if (streq(attr, "parent")) | |
993 | r = rule_line_add_token(rule_line, TK_M_IMPORT_PARENT, op, value, NULL, /* is_case_insensitive = */ false, token_str); | |
994 | else | |
995 | return log_line_invalid_attr(rule_line, key); | |
996 | } else if (streq(key, "RESULT")) { | |
997 | if (attr) | |
998 | return log_line_invalid_attr(rule_line, key); | |
999 | if (!is_match) | |
1000 | return log_line_invalid_op(rule_line, key); | |
1001 | ||
1002 | r = rule_line_add_token(rule_line, TK_M_RESULT, op, value, NULL, is_case_insensitive, token_str); | |
1003 | } else if (streq(key, "OPTIONS")) { | |
1004 | char *tmp; | |
1005 | ||
1006 | if (attr) | |
1007 | return log_line_invalid_attr(rule_line, key); | |
1008 | if (is_match || op == OP_REMOVE) | |
1009 | return log_line_invalid_op(rule_line, key); | |
1010 | if (op == OP_ADD) | |
1011 | op = OP_ASSIGN; | |
1012 | ||
1013 | if (streq(value, "dump")) | |
1014 | r = rule_line_add_token(rule_line, TK_A_OPTIONS_DUMP, op, NULL, NULL, /* is_case_insensitive = */ false, token_str); | |
1015 | else if (streq(value, "string_escape=none")) | |
1016 | r = rule_line_add_token(rule_line, TK_A_OPTIONS_STRING_ESCAPE_NONE, op, NULL, NULL, /* is_case_insensitive = */ false, token_str); | |
1017 | else if (streq(value, "string_escape=replace")) | |
1018 | r = rule_line_add_token(rule_line, TK_A_OPTIONS_STRING_ESCAPE_REPLACE, op, NULL, NULL, /* is_case_insensitive = */ false, token_str); | |
1019 | else if (streq(value, "db_persist")) | |
1020 | r = rule_line_add_token(rule_line, TK_A_OPTIONS_DB_PERSIST, op, NULL, NULL, /* is_case_insensitive = */ false, token_str); | |
1021 | else if (streq(value, "watch")) | |
1022 | r = rule_line_add_token(rule_line, TK_A_OPTIONS_INOTIFY_WATCH, op, NULL, INT_TO_PTR(1), /* is_case_insensitive = */ false, token_str); | |
1023 | else if (streq(value, "nowatch")) | |
1024 | r = rule_line_add_token(rule_line, TK_A_OPTIONS_INOTIFY_WATCH, op, NULL, INT_TO_PTR(0), /* is_case_insensitive = */ false, token_str); | |
1025 | else if ((tmp = startswith(value, "static_node="))) | |
1026 | r = rule_line_add_token(rule_line, TK_A_OPTIONS_STATIC_NODE, op, tmp, NULL, /* is_case_insensitive = */ false, token_str); | |
1027 | else if ((tmp = startswith(value, "link_priority="))) { | |
1028 | int prio; | |
1029 | ||
1030 | r = safe_atoi(tmp, &prio); | |
1031 | if (r < 0) | |
1032 | return log_line_error_errno(rule_line, r, "Failed to parse link priority '%s': %m", tmp); | |
1033 | r = rule_line_add_token(rule_line, TK_A_OPTIONS_DEVLINK_PRIORITY, op, NULL, INT_TO_PTR(prio), /* is_case_insensitive = */ false, token_str); | |
1034 | } else if ((tmp = startswith(value, "log_level="))) { | |
1035 | int level; | |
1036 | ||
1037 | if (streq(tmp, "reset")) | |
1038 | level = -1; | |
1039 | else { | |
1040 | level = log_level_from_string(tmp); | |
1041 | if (level < 0) | |
1042 | return log_line_error_errno(rule_line, level, "Failed to parse log level '%s': %m", tmp); | |
1043 | } | |
1044 | r = rule_line_add_token(rule_line, TK_A_OPTIONS_LOG_LEVEL, op, NULL, INT_TO_PTR(level), /* is_case_insensitive = */ false, token_str); | |
1045 | } else { | |
1046 | log_line_warning(rule_line, "Invalid value for OPTIONS key, ignoring: '%s'", value); | |
1047 | return 0; | |
1048 | } | |
1049 | } else if (streq(key, "OWNER")) { | |
1050 | if (attr) | |
1051 | return log_line_invalid_attr(rule_line, key); | |
1052 | if (is_match || op == OP_REMOVE) | |
1053 | return log_line_invalid_op(rule_line, key); | |
1054 | if (op == OP_ADD) { | |
1055 | log_line_warning(rule_line, "%s key takes '=' or ':=' operator, assuming '='.", key); | |
1056 | op = OP_ASSIGN; | |
1057 | } | |
1058 | ||
1059 | if (in_charset(value, DIGITS) || | |
1060 | (resolve_name_timing == RESOLVE_NAME_EARLY && | |
1061 | rule_get_substitution_type(value) == SUBST_TYPE_PLAIN)) { | |
1062 | uid_t uid = UID_INVALID; /* avoid false maybe-uninitialized warning */ | |
1063 | ||
1064 | r = rule_resolve_user(rule_line, value, &uid); | |
1065 | if (r < 0) | |
1066 | return r; | |
1067 | assert(uid_is_valid(uid)); | |
1068 | ||
1069 | r = rule_line_add_token(rule_line, TK_A_OWNER_ID, op, NULL, UID_TO_PTR(uid), /* is_case_insensitive = */ false, token_str); | |
1070 | } else if (resolve_name_timing != RESOLVE_NAME_NEVER) { | |
1071 | check_value_format_and_warn(rule_line, key, value, true); | |
1072 | r = rule_line_add_token(rule_line, TK_A_OWNER, op, value, NULL, /* is_case_insensitive = */ false, token_str); | |
1073 | } else { | |
1074 | log_line_debug(rule_line, "User name resolution is disabled, ignoring %s=\"%s\".", key, value); | |
1075 | return 0; | |
1076 | } | |
1077 | } else if (streq(key, "GROUP")) { | |
1078 | if (attr) | |
1079 | return log_line_invalid_attr(rule_line, key); | |
1080 | if (is_match || op == OP_REMOVE) | |
1081 | return log_line_invalid_op(rule_line, key); | |
1082 | if (op == OP_ADD) { | |
1083 | log_line_warning(rule_line, "%s key takes '=' or ':=' operator, assuming '='.", key); | |
1084 | op = OP_ASSIGN; | |
1085 | } | |
1086 | ||
1087 | if (in_charset(value, DIGITS) || | |
1088 | (resolve_name_timing == RESOLVE_NAME_EARLY && | |
1089 | rule_get_substitution_type(value) == SUBST_TYPE_PLAIN)) { | |
1090 | gid_t gid = GID_INVALID; /* avoid false maybe-uninitialized warning */ | |
1091 | ||
1092 | r = rule_resolve_group(rule_line, value, &gid); | |
1093 | if (r < 0) | |
1094 | return r; | |
1095 | assert(gid_is_valid(gid)); | |
1096 | ||
1097 | r = rule_line_add_token(rule_line, TK_A_GROUP_ID, op, NULL, GID_TO_PTR(gid), /* is_case_insensitive = */ false, token_str); | |
1098 | } else if (resolve_name_timing != RESOLVE_NAME_NEVER) { | |
1099 | check_value_format_and_warn(rule_line, key, value, true); | |
1100 | r = rule_line_add_token(rule_line, TK_A_GROUP, op, value, NULL, /* is_case_insensitive = */ false, token_str); | |
1101 | } else { | |
1102 | log_line_debug(rule_line, "Resolving group name is disabled, ignoring GROUP=\"%s\".", value); | |
1103 | return 0; | |
1104 | } | |
1105 | } else if (streq(key, "MODE")) { | |
1106 | mode_t mode; | |
1107 | ||
1108 | if (attr) | |
1109 | return log_line_invalid_attr(rule_line, key); | |
1110 | if (is_match || op == OP_REMOVE) | |
1111 | return log_line_invalid_op(rule_line, key); | |
1112 | if (op == OP_ADD) { | |
1113 | log_line_warning(rule_line, "%s key takes '=' or ':=' operator, assuming '='.", key); | |
1114 | op = OP_ASSIGN; | |
1115 | } | |
1116 | ||
1117 | if (parse_mode(value, &mode) >= 0) | |
1118 | r = rule_line_add_token(rule_line, TK_A_MODE_ID, op, NULL, MODE_TO_PTR(mode), /* is_case_insensitive = */ false, token_str); | |
1119 | else { | |
1120 | check_value_format_and_warn(rule_line, key, value, true); | |
1121 | r = rule_line_add_token(rule_line, TK_A_MODE, op, value, NULL, /* is_case_insensitive = */ false, token_str); | |
1122 | } | |
1123 | } else if (streq(key, "SECLABEL")) { | |
1124 | if (isempty(attr)) | |
1125 | return log_line_invalid_attr(rule_line, key); | |
1126 | check_value_format_and_warn(rule_line, key, value, true); | |
1127 | if (is_match || op == OP_REMOVE) | |
1128 | return log_line_invalid_op(rule_line, key); | |
1129 | if (op == OP_ASSIGN_FINAL) { | |
1130 | log_line_warning(rule_line, "%s key takes '=' or '+=' operator, assuming '='.", key); | |
1131 | op = OP_ASSIGN; | |
1132 | } | |
1133 | ||
1134 | r = rule_line_add_token(rule_line, TK_A_SECLABEL, op, value, attr, /* is_case_insensitive = */ false, token_str); | |
1135 | } else if (streq(key, "RUN")) { | |
1136 | if (is_match || op == OP_REMOVE) | |
1137 | return log_line_invalid_op(rule_line, key); | |
1138 | check_value_format_and_warn(rule_line, key, value, true); | |
1139 | if (!attr || streq(attr, "program")) | |
1140 | r = rule_line_add_token(rule_line, TK_A_RUN_PROGRAM, op, value, NULL, /* is_case_insensitive = */ false, token_str); | |
1141 | else if (streq(attr, "builtin")) { | |
1142 | UdevBuiltinCommand cmd; | |
1143 | ||
1144 | cmd = udev_builtin_lookup(value); | |
1145 | if (cmd < 0) | |
1146 | return log_line_error_errno(rule_line, SYNTHETIC_ERRNO(EINVAL), | |
1147 | "Unknown builtin command '%s', ignoring.", value); | |
1148 | r = rule_line_add_token(rule_line, TK_A_RUN_BUILTIN, op, value, UDEV_BUILTIN_CMD_TO_PTR(cmd), /* is_case_insensitive = */ false, token_str); | |
1149 | } else | |
1150 | return log_line_invalid_attr(rule_line, key); | |
1151 | } else if (streq(key, "GOTO")) { | |
1152 | if (attr) | |
1153 | return log_line_invalid_attr(rule_line, key); | |
1154 | if (op != OP_ASSIGN) | |
1155 | return log_line_invalid_op(rule_line, key); | |
1156 | if (FLAGS_SET(rule_line->type, LINE_HAS_GOTO)) { | |
1157 | log_line_warning(rule_line, "Contains multiple GOTO keys, ignoring GOTO=\"%s\".", value); | |
1158 | return 0; | |
1159 | } | |
1160 | ||
1161 | rule_line->goto_label = value; | |
1162 | SET_FLAG(rule_line->type, LINE_HAS_GOTO, true); | |
1163 | return 1; | |
1164 | } else if (streq(key, "LABEL")) { | |
1165 | if (attr) | |
1166 | return log_line_invalid_attr(rule_line, key); | |
1167 | if (op != OP_ASSIGN) | |
1168 | return log_line_invalid_op(rule_line, key); | |
1169 | if (FLAGS_SET(rule_line->type, LINE_HAS_LABEL)) | |
1170 | log_line_warning(rule_line, "Contains multiple LABEL keys, ignoring LABEL=\"%s\".", | |
1171 | rule_line->label); | |
1172 | ||
1173 | rule_line->label = value; | |
1174 | SET_FLAG(rule_line->type, LINE_HAS_LABEL, true); | |
1175 | return 1; | |
1176 | } else | |
1177 | return log_line_error_errno(rule_line, SYNTHETIC_ERRNO(EINVAL), "Invalid key '%s'.", key); | |
1178 | if (r < 0) | |
1179 | return log_oom(); | |
1180 | ||
1181 | return 1; | |
1182 | } | |
1183 | ||
1184 | static UdevRuleOperatorType parse_operator(const char *op) { | |
1185 | assert(op); | |
1186 | ||
1187 | if (startswith(op, "==")) | |
1188 | return OP_MATCH; | |
1189 | if (startswith(op, "!=")) | |
1190 | return OP_NOMATCH; | |
1191 | if (startswith(op, "+=")) | |
1192 | return OP_ADD; | |
1193 | if (startswith(op, "-=")) | |
1194 | return OP_REMOVE; | |
1195 | if (startswith(op, "=")) | |
1196 | return OP_ASSIGN; | |
1197 | if (startswith(op, ":=")) | |
1198 | return OP_ASSIGN_FINAL; | |
1199 | ||
1200 | return _OP_TYPE_INVALID; | |
1201 | } | |
1202 | ||
1203 | static void check_token_delimiters(UdevRuleLine *rule_line, const char *line) { | |
1204 | assert(rule_line); | |
1205 | ||
1206 | size_t n_comma = 0; | |
1207 | bool ws_before_comma = false, ws_after_comma = false; | |
1208 | const char *p; | |
1209 | ||
1210 | for (p = line; !isempty(p); ++p) { | |
1211 | if (*p == ',') | |
1212 | ++n_comma; | |
1213 | else if (strchr(WHITESPACE, *p)) { | |
1214 | if (n_comma > 0) | |
1215 | ws_after_comma = true; | |
1216 | else | |
1217 | ws_before_comma = true; | |
1218 | } else | |
1219 | break; | |
1220 | } | |
1221 | ||
1222 | if (line == rule_line->line) { | |
1223 | /* this is the first token of the rule */ | |
1224 | if (n_comma > 0) | |
1225 | log_line_notice(rule_line, "style: stray leading comma."); | |
1226 | } else if (isempty(p)) { | |
1227 | /* there are no more tokens in the rule */ | |
1228 | if (n_comma > 0) | |
1229 | log_line_notice(rule_line, "style: stray trailing comma."); | |
1230 | } else { | |
1231 | /* single comma is expected */ | |
1232 | if (n_comma == 0) | |
1233 | log_line_notice(rule_line, "style: a comma between tokens is expected."); | |
1234 | else if (n_comma > 1) | |
1235 | log_line_notice(rule_line, "style: more than one comma between tokens."); | |
1236 | ||
1237 | /* whitespace after comma is expected */ | |
1238 | if (n_comma > 0) { | |
1239 | if (ws_before_comma) | |
1240 | log_line_notice(rule_line, "style: stray whitespace before comma."); | |
1241 | if (!ws_after_comma) | |
1242 | log_line_notice(rule_line, "style: whitespace after comma is expected."); | |
1243 | } else if (!ws_before_comma && !ws_after_comma) | |
1244 | log_line_notice(rule_line, "style: whitespace between tokens is expected."); | |
1245 | } | |
1246 | } | |
1247 | ||
1248 | int udev_rule_parse_value(char *str, char **ret_value, char **ret_endpos, bool *ret_is_case_insensitive) { | |
1249 | char *i, *j; | |
1250 | bool is_escaped = false, is_case_insensitive = false; | |
1251 | ||
1252 | assert(str); | |
1253 | assert(ret_value); | |
1254 | assert(ret_endpos); | |
1255 | assert(ret_is_case_insensitive); | |
1256 | ||
1257 | /* check if string is prefixed with: | |
1258 | * - "e" for escaped | |
1259 | * - "i" for case insensitive match | |
1260 | * | |
1261 | * Note both e and i can be set but do not allow duplicates ("eei", "eii"). */ | |
1262 | for (const char *k = str; *k != '"' && k < str + 2; k++) | |
1263 | if (*k == 'e' && !is_escaped) | |
1264 | is_escaped = true; | |
1265 | else if (*k == 'i' && !is_case_insensitive) | |
1266 | is_case_insensitive = true; | |
1267 | else | |
1268 | return -EINVAL; | |
1269 | ||
1270 | /* value must be double quotated */ | |
1271 | str += is_escaped + is_case_insensitive; | |
1272 | if (str[0] != '"') | |
1273 | return -EINVAL; | |
1274 | ||
1275 | if (!is_escaped) { | |
1276 | /* unescape double quotation '\"'->'"' */ | |
1277 | for (j = str, i = str + 1; *i != '"'; i++, j++) { | |
1278 | if (*i == '\0') | |
1279 | return -EINVAL; | |
1280 | if (i[0] == '\\' && i[1] == '"') | |
1281 | i++; | |
1282 | *j = *i; | |
1283 | } | |
1284 | j[0] = '\0'; | |
1285 | /* | |
1286 | * The return value must be terminated by two subsequent NULs | |
1287 | * so it could be safely interpreted as nulstr. | |
1288 | */ | |
1289 | j[1] = '\0'; | |
1290 | } else { | |
1291 | _cleanup_free_ char *unescaped = NULL; | |
1292 | ssize_t l; | |
1293 | ||
1294 | /* find the end position of value */ | |
1295 | for (i = str + 1; *i != '"'; i++) { | |
1296 | if (i[0] == '\\') | |
1297 | i++; | |
1298 | if (*i == '\0') | |
1299 | return -EINVAL; | |
1300 | } | |
1301 | i[0] = '\0'; | |
1302 | ||
1303 | l = cunescape_length(str + 1, i - (str + 1), 0, &unescaped); | |
1304 | if (l < 0) | |
1305 | return l; | |
1306 | ||
1307 | assert(l <= i - (str + 1)); | |
1308 | memcpy(str, unescaped, l + 1); | |
1309 | /* | |
1310 | * The return value must be terminated by two subsequent NULs | |
1311 | * so it could be safely interpreted as nulstr. | |
1312 | */ | |
1313 | str[l + 1] = '\0'; | |
1314 | } | |
1315 | ||
1316 | *ret_value = str; | |
1317 | *ret_endpos = i + 1; | |
1318 | *ret_is_case_insensitive = is_case_insensitive; | |
1319 | return 0; | |
1320 | } | |
1321 | ||
1322 | static int parse_line(char **line, char **ret_key, char **ret_attr, UdevRuleOperatorType *ret_op, char **ret_value, bool *ret_is_case_insensitive) { | |
1323 | char *key_begin, *key_end, *attr, *tmp; | |
1324 | UdevRuleOperatorType op; | |
1325 | int r; | |
1326 | ||
1327 | assert(line); | |
1328 | assert(*line); | |
1329 | assert(ret_key); | |
1330 | assert(ret_op); | |
1331 | assert(ret_value); | |
1332 | assert(ret_is_case_insensitive); | |
1333 | ||
1334 | key_begin = skip_leading_chars(*line, WHITESPACE ","); | |
1335 | ||
1336 | if (isempty(key_begin)) | |
1337 | return 0; | |
1338 | ||
1339 | for (key_end = key_begin; ; key_end++) { | |
1340 | if (key_end[0] == '\0') | |
1341 | return -EINVAL; | |
1342 | if (strchr(WHITESPACE "={", key_end[0])) | |
1343 | break; | |
1344 | if (strchr("+-!:", key_end[0]) && key_end[1] == '=') | |
1345 | break; | |
1346 | } | |
1347 | if (key_end[0] == '{') { | |
1348 | attr = key_end + 1; | |
1349 | tmp = strchr(attr, '}'); | |
1350 | if (!tmp) | |
1351 | return -EINVAL; | |
1352 | *tmp++ = '\0'; | |
1353 | } else { | |
1354 | attr = NULL; | |
1355 | tmp = key_end; | |
1356 | } | |
1357 | ||
1358 | tmp = skip_leading_chars(tmp, NULL); | |
1359 | op = parse_operator(tmp); | |
1360 | if (op < 0) | |
1361 | return -EINVAL; | |
1362 | ||
1363 | key_end[0] = '\0'; | |
1364 | ||
1365 | tmp += op == OP_ASSIGN ? 1 : 2; | |
1366 | tmp = skip_leading_chars(tmp, NULL); | |
1367 | r = udev_rule_parse_value(tmp, ret_value, line, ret_is_case_insensitive); | |
1368 | if (r < 0) | |
1369 | return r; | |
1370 | ||
1371 | *ret_key = key_begin; | |
1372 | *ret_attr = attr; | |
1373 | *ret_op = op; | |
1374 | return 1; | |
1375 | } | |
1376 | ||
1377 | static void check_tokens_order(UdevRuleLine *rule_line) { | |
1378 | bool has_result = false; | |
1379 | ||
1380 | assert(rule_line); | |
1381 | ||
1382 | LIST_FOREACH(tokens, t, rule_line->tokens) | |
1383 | if (t->type == TK_M_RESULT) | |
1384 | has_result = true; | |
1385 | else if (has_result && t->type == TK_M_PROGRAM) { | |
1386 | log_line_warning(rule_line, "Reordering RESULT check after PROGRAM assignment."); | |
1387 | break; | |
1388 | } | |
1389 | } | |
1390 | ||
1391 | static void sort_tokens(UdevRuleLine *rule_line) { | |
1392 | assert(rule_line); | |
1393 | ||
1394 | UdevRuleToken *old_tokens = TAKE_PTR(rule_line->tokens); | |
1395 | ||
1396 | while (old_tokens) { | |
1397 | UdevRuleToken *min_token = NULL; | |
1398 | ||
1399 | LIST_FOREACH(tokens, t, old_tokens) | |
1400 | if (!min_token || min_token->type > t->type) | |
1401 | min_token = t; | |
1402 | ||
1403 | LIST_REMOVE(tokens, old_tokens, min_token); | |
1404 | LIST_APPEND(tokens, rule_line->tokens, min_token); | |
1405 | } | |
1406 | } | |
1407 | ||
1408 | static int rule_add_line(UdevRuleFile *rule_file, const char *line, unsigned line_nr, bool extra_checks) { | |
1409 | _cleanup_(udev_rule_line_freep) UdevRuleLine *rule_line = NULL; | |
1410 | char *p; | |
1411 | int r; | |
1412 | ||
1413 | assert(rule_file); | |
1414 | assert(line); | |
1415 | ||
1416 | if (isempty(line)) | |
1417 | return 0; | |
1418 | ||
1419 | rule_line = new(UdevRuleLine, 1); | |
1420 | if (!rule_line) | |
1421 | return log_oom(); | |
1422 | ||
1423 | *rule_line = (UdevRuleLine) { | |
1424 | .line = strdup(line), | |
1425 | .line_for_logging = strdup(line), | |
1426 | .line_number = line_nr, | |
1427 | }; | |
1428 | if (!rule_line->line || !rule_line->line_for_logging) | |
1429 | return log_oom(); | |
1430 | ||
1431 | rule_line->rule_file = rule_file; | |
1432 | LIST_APPEND(rule_lines, rule_file->rule_lines, rule_line); | |
1433 | ||
1434 | for (p = rule_line->line; !isempty(p); ) { | |
1435 | char *key, *attr, *value; | |
1436 | UdevRuleOperatorType op; | |
1437 | bool is_case_insensitive; | |
1438 | ||
1439 | if (extra_checks) | |
1440 | check_token_delimiters(rule_line, p); | |
1441 | ||
1442 | r = parse_line(&p, &key, &attr, &op, &value, &is_case_insensitive); | |
1443 | if (r < 0) | |
1444 | return log_line_error_errno(rule_line, r, "Invalid key/value pair, ignoring."); | |
1445 | if (r == 0) | |
1446 | break; | |
1447 | ||
1448 | char *token_str = rule_line->line_for_logging + (key - rule_line->line); | |
1449 | token_str[p - key] = '\0'; | |
1450 | r = parse_token(rule_line, key, attr, op, value, is_case_insensitive, token_str); | |
1451 | if (r < 0) | |
1452 | return r; | |
1453 | } | |
1454 | ||
1455 | if (rule_line->type == 0) { | |
1456 | log_line_warning(rule_line, "The line has no effect, ignoring."); | |
1457 | return 0; | |
1458 | } | |
1459 | ||
1460 | if (extra_checks) | |
1461 | check_tokens_order(rule_line); | |
1462 | ||
1463 | sort_tokens(rule_line); | |
1464 | TAKE_PTR(rule_line); | |
1465 | return 0; | |
1466 | } | |
1467 | ||
1468 | static void rule_resolve_goto(UdevRuleFile *rule_file) { | |
1469 | assert(rule_file); | |
1470 | ||
1471 | /* link GOTOs to LABEL rules in this file to be able to fast-forward */ | |
1472 | LIST_FOREACH(rule_lines, line, rule_file->rule_lines) { | |
1473 | if (!FLAGS_SET(line->type, LINE_HAS_GOTO)) | |
1474 | continue; | |
1475 | ||
1476 | LIST_FOREACH(rule_lines, i, line->rule_lines_next) | |
1477 | if (streq_ptr(i->label, line->goto_label)) { | |
1478 | line->goto_line = i; | |
1479 | SET_FLAG(i->type, LINE_IS_REFERENCED, true); | |
1480 | break; | |
1481 | } | |
1482 | ||
1483 | if (!line->goto_line) { | |
1484 | log_line_error(line, "GOTO=\"%s\" has no matching label, ignoring.", | |
1485 | line->goto_label); | |
1486 | ||
1487 | SET_FLAG(line->type, LINE_HAS_GOTO, false); | |
1488 | line->goto_label = NULL; | |
1489 | ||
1490 | if ((line->type & ~(LINE_HAS_LABEL|LINE_IS_REFERENCED)) == 0) { | |
1491 | log_line_warning(line, "The line has no effect any more, dropping."); | |
1492 | /* LINE_IS_REFERENCED implies LINE_HAS_LABEL */ | |
1493 | if (line->type & LINE_HAS_LABEL) | |
1494 | udev_rule_line_clear_tokens(line); | |
1495 | else | |
1496 | udev_rule_line_free(line); | |
1497 | } | |
1498 | } | |
1499 | } | |
1500 | } | |
1501 | ||
1502 | static bool token_data_is_string(UdevRuleTokenType type) { | |
1503 | return IN_SET(type, TK_M_ENV, | |
1504 | TK_M_CONST, | |
1505 | TK_M_ATTR, | |
1506 | TK_M_SYSCTL, | |
1507 | TK_M_PARENTS_ATTR, | |
1508 | TK_A_SECLABEL, | |
1509 | TK_A_ENV, | |
1510 | TK_A_ATTR, | |
1511 | TK_A_SYSCTL); | |
1512 | } | |
1513 | ||
1514 | static bool token_type_and_data_eq(const UdevRuleToken *a, const UdevRuleToken *b) { | |
1515 | assert(a); | |
1516 | assert(b); | |
1517 | ||
1518 | return a->type == b->type && | |
1519 | (token_data_is_string(a->type) ? streq_ptr(a->data, b->data) : (a->data == b->data)); | |
1520 | } | |
1521 | ||
1522 | static bool nulstr_eq(const char *a, const char *b) { | |
1523 | NULSTR_FOREACH(i, a) | |
1524 | if (!nulstr_contains(b, i)) | |
1525 | return false; | |
1526 | ||
1527 | NULSTR_FOREACH(i, b) | |
1528 | if (!nulstr_contains(a, i)) | |
1529 | return false; | |
1530 | ||
1531 | return true; | |
1532 | } | |
1533 | ||
1534 | static bool token_type_and_value_eq(const UdevRuleToken *a, const UdevRuleToken *b) { | |
1535 | assert(a); | |
1536 | assert(b); | |
1537 | ||
1538 | if (a->type != b->type || | |
1539 | a->match_type != b->match_type) | |
1540 | return false; | |
1541 | ||
1542 | /* token value is ignored for certain match types */ | |
1543 | if (IN_SET(a->match_type, MATCH_TYPE_EMPTY, MATCH_TYPE_SUBSYSTEM)) | |
1544 | return true; | |
1545 | ||
1546 | return type_has_nulstr_value(a->type) ? nulstr_eq(a->value, b->value) : | |
1547 | streq_ptr(a->value, b->value); | |
1548 | } | |
1549 | ||
1550 | static bool conflicting_op(UdevRuleOperatorType a, UdevRuleOperatorType b) { | |
1551 | return (a == OP_MATCH && b == OP_NOMATCH) || | |
1552 | (a == OP_NOMATCH && b == OP_MATCH); | |
1553 | } | |
1554 | ||
1555 | /* test whether all fields besides UdevRuleOperatorType of two tokens match */ | |
1556 | static bool tokens_eq(const UdevRuleToken *a, const UdevRuleToken *b) { | |
1557 | assert(a); | |
1558 | assert(b); | |
1559 | ||
1560 | return a->attr_subst_type == b->attr_subst_type && | |
1561 | token_type_and_value_eq(a, b) && | |
1562 | token_type_and_data_eq(a, b); | |
1563 | } | |
1564 | ||
1565 | static bool nulstr_tokens_conflict(const UdevRuleToken *a, const UdevRuleToken *b) { | |
1566 | assert(a); | |
1567 | assert(b); | |
1568 | ||
1569 | if (!(a->type == b->type && | |
1570 | type_has_nulstr_value(a->type) && | |
1571 | a->op == b->op && | |
1572 | a->op == OP_MATCH && | |
1573 | a->match_type == b->match_type && | |
1574 | a->attr_subst_type == b->attr_subst_type && | |
1575 | token_type_and_data_eq(a, b))) | |
1576 | return false; | |
1577 | ||
1578 | if (a->match_type == MATCH_TYPE_PLAIN) { | |
1579 | NULSTR_FOREACH(i, a->value) | |
1580 | if (nulstr_contains(b->value, i)) | |
1581 | return false; | |
1582 | return true; | |
1583 | } | |
1584 | ||
1585 | if (a->match_type == MATCH_TYPE_GLOB) { | |
1586 | NULSTR_FOREACH(i, a->value) { | |
1587 | size_t i_n = strcspn(i, GLOB_CHARS); | |
1588 | if (i_n == 0) | |
1589 | return false; | |
1590 | NULSTR_FOREACH(j, b->value) { | |
1591 | size_t j_n = strcspn(j, GLOB_CHARS); | |
1592 | if (j_n == 0 || strneq(i, j, MIN(i_n, j_n))) | |
1593 | return false; | |
1594 | } | |
1595 | ||
1596 | } | |
1597 | return true; | |
1598 | } | |
1599 | ||
1600 | return false; | |
1601 | } | |
1602 | ||
1603 | static void udev_check_unused_labels(UdevRuleLine *line) { | |
1604 | assert(line); | |
1605 | ||
1606 | if (FLAGS_SET(line->type, LINE_HAS_LABEL) && | |
1607 | !FLAGS_SET(line->type, LINE_IS_REFERENCED)) | |
1608 | log_line_notice(line, "style: LABEL=\"%s\" is unused.", line->label); | |
1609 | } | |
1610 | ||
1611 | static void udev_check_conflicts_duplicates(UdevRuleLine *line) { | |
1612 | assert(line); | |
1613 | ||
1614 | bool conflicts = false, duplicates = false; | |
1615 | ||
1616 | LIST_FOREACH(tokens, token, line->tokens) | |
1617 | LIST_FOREACH(tokens, i, token->tokens_next) { | |
1618 | bool new_conflicts = false, new_duplicates = false; | |
1619 | ||
1620 | if (tokens_eq(token, i)) { | |
1621 | if (!duplicates && token->op == i->op) | |
1622 | new_duplicates = true; | |
1623 | if (!conflicts && conflicting_op(token->op, i->op)) | |
1624 | new_conflicts = true; | |
1625 | } else if (!conflicts && nulstr_tokens_conflict(token, i)) | |
1626 | new_conflicts = true; | |
1627 | else | |
1628 | continue; | |
1629 | ||
1630 | if (new_duplicates) { | |
1631 | duplicates = new_duplicates; | |
1632 | log_line_warning(line, "duplicate expressions."); | |
1633 | } | |
1634 | if (new_conflicts) { | |
1635 | conflicts = new_conflicts; | |
1636 | log_line_error(line, "conflicting match expressions, the line has no effect."); | |
1637 | } | |
1638 | if (conflicts && duplicates) | |
1639 | return; | |
1640 | } | |
1641 | } | |
1642 | ||
1643 | static void udev_check_rule_line(UdevRuleLine *line) { | |
1644 | udev_check_unused_labels(line); | |
1645 | udev_check_conflicts_duplicates(line); | |
1646 | } | |
1647 | ||
1648 | int udev_rules_parse_file(UdevRules *rules, const char *filename, bool extra_checks, UdevRuleFile **ret) { | |
1649 | _cleanup_(udev_rule_file_freep) UdevRuleFile *rule_file = NULL; | |
1650 | _cleanup_free_ char *name = NULL; | |
1651 | _cleanup_fclose_ FILE *f = NULL; | |
1652 | struct stat st; | |
1653 | int r; | |
1654 | ||
1655 | assert(rules); | |
1656 | assert(filename); | |
1657 | ||
1658 | f = fopen(filename, "re"); | |
1659 | if (!f) { | |
1660 | if (extra_checks) | |
1661 | return -errno; | |
1662 | ||
1663 | if (errno == ENOENT) | |
1664 | return 0; | |
1665 | ||
1666 | return log_warning_errno(errno, "Failed to open %s, ignoring: %m", filename); | |
1667 | } | |
1668 | ||
1669 | if (fstat(fileno(f), &st) < 0) | |
1670 | return log_warning_errno(errno, "Failed to stat %s, ignoring: %m", filename); | |
1671 | ||
1672 | if (null_or_empty(&st)) { | |
1673 | log_debug("Skipping empty file: %s", filename); | |
1674 | if (ret) | |
1675 | *ret = NULL; | |
1676 | return 0; | |
1677 | } | |
1678 | ||
1679 | r = hashmap_put_stats_by_path(&rules->stats_by_path, filename, &st); | |
1680 | if (r < 0) | |
1681 | return log_warning_errno(r, "Failed to save stat for %s, ignoring: %m", filename); | |
1682 | ||
1683 | (void) fd_warn_permissions(filename, fileno(f)); | |
1684 | ||
1685 | log_debug("Reading rules file: %s", filename); | |
1686 | ||
1687 | name = strdup(filename); | |
1688 | if (!name) | |
1689 | return log_oom(); | |
1690 | ||
1691 | rule_file = new(UdevRuleFile, 1); | |
1692 | if (!rule_file) | |
1693 | return log_oom(); | |
1694 | ||
1695 | *rule_file = (UdevRuleFile) { | |
1696 | .filename = TAKE_PTR(name), | |
1697 | .rules = rules, | |
1698 | }; | |
1699 | ||
1700 | LIST_APPEND(rule_files, rules->rule_files, rule_file); | |
1701 | ||
1702 | _cleanup_free_ char *continuation = NULL; | |
1703 | unsigned line_nr = 0, current_line_nr = 0; | |
1704 | bool ignore_line = false; | |
1705 | for (;;) { | |
1706 | _cleanup_free_ char *buf = NULL; | |
1707 | size_t len; | |
1708 | char *line; | |
1709 | ||
1710 | r = read_line(f, UDEV_LINE_SIZE, &buf); | |
1711 | if (r < 0) | |
1712 | return r; | |
1713 | if (r == 0) | |
1714 | break; | |
1715 | ||
1716 | current_line_nr++; | |
1717 | if (!continuation) | |
1718 | line_nr = current_line_nr; | |
1719 | ||
1720 | line = skip_leading_chars(buf, NULL); | |
1721 | ||
1722 | /* Lines beginning with '#' are ignored regardless of line continuation. */ | |
1723 | if (line[0] == '#') | |
1724 | continue; | |
1725 | ||
1726 | len = strlen(line); | |
1727 | ||
1728 | if (continuation && !ignore_line) { | |
1729 | if (strlen(continuation) + len >= UDEV_LINE_SIZE) | |
1730 | ignore_line = true; | |
1731 | ||
1732 | if (!strextend(&continuation, line)) | |
1733 | return log_oom(); | |
1734 | ||
1735 | if (!ignore_line) { | |
1736 | line = continuation; | |
1737 | len = strlen(line); | |
1738 | } | |
1739 | } | |
1740 | ||
1741 | if (len > 0 && line[len - 1] == '\\') { | |
1742 | if (ignore_line) | |
1743 | continue; | |
1744 | ||
1745 | line[len - 1] = '\0'; | |
1746 | if (!continuation) { | |
1747 | continuation = strdup(line); | |
1748 | if (!continuation) | |
1749 | return log_oom(); | |
1750 | } | |
1751 | ||
1752 | continue; | |
1753 | } | |
1754 | ||
1755 | if (ignore_line) | |
1756 | log_file_error(rule_file, line_nr, "Line is too long, ignored."); | |
1757 | else if (len > 0) | |
1758 | (void) rule_add_line(rule_file, line, line_nr, extra_checks); | |
1759 | ||
1760 | continuation = mfree(continuation); | |
1761 | ignore_line = false; | |
1762 | } | |
1763 | ||
1764 | if (continuation) | |
1765 | log_file_error(rule_file, line_nr, | |
1766 | "Unexpected EOF after line continuation, line ignored."); | |
1767 | ||
1768 | rule_resolve_goto(rule_file); | |
1769 | ||
1770 | if (extra_checks) | |
1771 | LIST_FOREACH(rule_lines, line, rule_file->rule_lines) | |
1772 | udev_check_rule_line(line); | |
1773 | ||
1774 | if (ret) | |
1775 | *ret = rule_file; | |
1776 | ||
1777 | TAKE_PTR(rule_file); | |
1778 | return 1; | |
1779 | } | |
1780 | ||
1781 | unsigned udev_rule_file_get_issues(UdevRuleFile *rule_file) { | |
1782 | assert(rule_file); | |
1783 | ||
1784 | return rule_file->issues; | |
1785 | } | |
1786 | ||
1787 | UdevRules* udev_rules_new(ResolveNameTiming resolve_name_timing) { | |
1788 | assert(resolve_name_timing >= 0 && resolve_name_timing < _RESOLVE_NAME_TIMING_MAX); | |
1789 | ||
1790 | UdevRules *rules = new(UdevRules, 1); | |
1791 | if (!rules) | |
1792 | return NULL; | |
1793 | ||
1794 | *rules = (UdevRules) { | |
1795 | .resolve_name_timing = resolve_name_timing, | |
1796 | }; | |
1797 | ||
1798 | return rules; | |
1799 | } | |
1800 | ||
1801 | int udev_rules_load(UdevRules **ret_rules, ResolveNameTiming resolve_name_timing, char * const *extra) { | |
1802 | _cleanup_(udev_rules_freep) UdevRules *rules = NULL; | |
1803 | _cleanup_strv_free_ char **files = NULL, **directories = NULL; | |
1804 | int r; | |
1805 | ||
1806 | rules = udev_rules_new(resolve_name_timing); | |
1807 | if (!rules) | |
1808 | return -ENOMEM; | |
1809 | ||
1810 | if (!strv_isempty(extra)) { | |
1811 | directories = strv_copy(extra); | |
1812 | if (!directories) | |
1813 | return -ENOMEM; | |
1814 | } | |
1815 | ||
1816 | r = strv_extend_strv(&directories, CONF_PATHS_STRV("udev/rules.d"), /* filter_duplicates = */ false); | |
1817 | if (r < 0) | |
1818 | return r; | |
1819 | ||
1820 | r = conf_files_list_strv(&files, ".rules", NULL, 0, (const char* const*) directories); | |
1821 | if (r < 0) | |
1822 | return log_debug_errno(r, "Failed to enumerate rules files: %m"); | |
1823 | ||
1824 | STRV_FOREACH(f, files) { | |
1825 | r = udev_rules_parse_file(rules, *f, /* extra_checks = */ false, NULL); | |
1826 | if (r < 0) | |
1827 | log_debug_errno(r, "Failed to read rules file %s, ignoring: %m", *f); | |
1828 | } | |
1829 | ||
1830 | *ret_rules = TAKE_PTR(rules); | |
1831 | return 0; | |
1832 | } | |
1833 | ||
1834 | bool udev_rules_should_reload(UdevRules *rules) { | |
1835 | _cleanup_hashmap_free_ Hashmap *stats_by_path = NULL; | |
1836 | int r; | |
1837 | ||
1838 | if (!rules) | |
1839 | return true; | |
1840 | ||
1841 | r = config_get_stats_by_path(".rules", NULL, 0, RULES_DIRS, /* check_dropins = */ false, &stats_by_path); | |
1842 | if (r < 0) { | |
1843 | log_warning_errno(r, "Failed to get stats of udev rules, ignoring: %m"); | |
1844 | return true; | |
1845 | } | |
1846 | ||
1847 | if (!stats_by_path_equal(rules->stats_by_path, stats_by_path)) { | |
1848 | log_debug("Udev rules need reloading"); | |
1849 | return true; | |
1850 | } | |
1851 | ||
1852 | return false; | |
1853 | } | |
1854 | ||
1855 | static bool apply_format_full( | |
1856 | UdevEvent *event, | |
1857 | UdevRuleToken *token, | |
1858 | const char *format, | |
1859 | char *result, | |
1860 | size_t result_size, | |
1861 | bool replace_whitespace, | |
1862 | const char *what) { | |
1863 | ||
1864 | assert(event); | |
1865 | assert(token); | |
1866 | assert(format); | |
1867 | assert(result); | |
1868 | assert(what); | |
1869 | ||
1870 | bool truncated = false; | |
1871 | (void) udev_event_apply_format(event, format, result, result_size, replace_whitespace, &truncated); | |
1872 | if (truncated) { | |
1873 | log_event_truncated(event, token, what, format); | |
1874 | return false; | |
1875 | } | |
1876 | ||
1877 | if (event->trace && !streq(format, result)) | |
1878 | log_event_trace(event, token, "Format substitution: \"%s\" -> \"%s\"", format, result); | |
1879 | ||
1880 | return true; | |
1881 | } | |
1882 | ||
1883 | static bool apply_format_value( | |
1884 | UdevEvent *event, | |
1885 | UdevRuleToken *token, | |
1886 | char *result, | |
1887 | size_t result_size, | |
1888 | const char *what) { | |
1889 | ||
1890 | return apply_format_full(event, token, token->value, result, result_size, /* replace_whitespace = */ false, what); | |
1891 | } | |
1892 | ||
1893 | static bool apply_format_attr( | |
1894 | UdevEvent *event, | |
1895 | UdevRuleToken *token, | |
1896 | char *result, | |
1897 | size_t result_size, | |
1898 | const char *what) { | |
1899 | ||
1900 | return apply_format_full(event, token, token->data, result, result_size, /* replace_whitespace = */ false, what); | |
1901 | } | |
1902 | ||
1903 | static bool token_match_string(UdevEvent *event, UdevRuleToken *token, const char *str, bool log_result) { | |
1904 | const char *value; | |
1905 | bool match = false, case_insensitive; | |
1906 | ||
1907 | assert(event); | |
1908 | assert(token); | |
1909 | assert(token->value); | |
1910 | assert(token->type < _TK_M_MAX); | |
1911 | ||
1912 | str = strempty(str); | |
1913 | value = token->value; | |
1914 | case_insensitive = FLAGS_SET(token->match_type, MATCH_CASE_INSENSITIVE); | |
1915 | ||
1916 | switch (token->match_type & _MATCH_TYPE_MASK) { | |
1917 | case MATCH_TYPE_EMPTY: | |
1918 | match = isempty(str); | |
1919 | break; | |
1920 | case MATCH_TYPE_SUBSYSTEM: | |
1921 | if (case_insensitive) | |
1922 | match = STRCASE_IN_SET(str, "subsystem", "class", "bus"); | |
1923 | else | |
1924 | match = STR_IN_SET(str, "subsystem", "class", "bus"); | |
1925 | break; | |
1926 | case MATCH_TYPE_PLAIN_WITH_EMPTY: | |
1927 | if (isempty(str)) { | |
1928 | match = true; | |
1929 | break; | |
1930 | } | |
1931 | _fallthrough_; | |
1932 | case MATCH_TYPE_PLAIN: | |
1933 | NULSTR_FOREACH(i, value) | |
1934 | if (case_insensitive ? strcaseeq(i, str) : streq(i, str)) { | |
1935 | match = true; | |
1936 | break; | |
1937 | } | |
1938 | break; | |
1939 | case MATCH_TYPE_GLOB_WITH_EMPTY: | |
1940 | if (isempty(str)) { | |
1941 | match = true; | |
1942 | break; | |
1943 | } | |
1944 | _fallthrough_; | |
1945 | case MATCH_TYPE_GLOB: | |
1946 | NULSTR_FOREACH(i, value) | |
1947 | if ((fnmatch(i, str, case_insensitive ? FNM_CASEFOLD : 0) == 0)) { | |
1948 | match = true; | |
1949 | break; | |
1950 | } | |
1951 | break; | |
1952 | default: | |
1953 | assert_not_reached(); | |
1954 | } | |
1955 | ||
1956 | bool result = token->op == (match ? OP_MATCH : OP_NOMATCH); | |
1957 | ||
1958 | if (event->trace) | |
1959 | switch (token->match_type & _MATCH_TYPE_MASK) { | |
1960 | case MATCH_TYPE_EMPTY: | |
1961 | log_event_trace(event, token, "String \"%s\" is%s empty%s", | |
1962 | strempty(str), match ? "" : " not", | |
1963 | log_result ? result ? ": PASS" : ": FAIL" : "."); | |
1964 | break; | |
1965 | case MATCH_TYPE_SUBSYSTEM: | |
1966 | log_event_trace(event, token, | |
1967 | "String \"%s\" matches %s of \"subsystem\", \"class\", or \"bus\"%s", | |
1968 | strempty(str), match ? "one" : "neither", | |
1969 | log_result ? result ? ": PASS" : ": FAIL" : "."); | |
1970 | break; | |
1971 | case MATCH_TYPE_PLAIN_WITH_EMPTY: | |
1972 | case MATCH_TYPE_PLAIN: | |
1973 | case MATCH_TYPE_GLOB_WITH_EMPTY: | |
1974 | case MATCH_TYPE_GLOB: { | |
1975 | _cleanup_free_ char *joined = NULL; | |
1976 | unsigned c = 0; | |
1977 | ||
1978 | if (IN_SET(token->match_type & _MATCH_TYPE_MASK, MATCH_TYPE_PLAIN_WITH_EMPTY, MATCH_TYPE_GLOB_WITH_EMPTY)) { | |
1979 | (void) strextend_with_separator(&joined, ", ", "\"\""); | |
1980 | c++; | |
1981 | } | |
1982 | ||
1983 | NULSTR_FOREACH(i, value) { | |
1984 | (void) strextendf_with_separator(&joined, ", ", "\"%s\"", i); | |
1985 | c++; | |
1986 | } | |
1987 | ||
1988 | assert(c > 0); | |
1989 | log_event_trace(event, token, "String \"%s\" %s %s%s", | |
1990 | strempty(str), | |
1991 | match ? (c > 1 ? "matches one of" : "matches") : (c > 1 ? "matches neither of" : "does not match"), | |
1992 | strempty(joined), | |
1993 | log_result ? result ? ": PASS" : ": FAIL" : "."); | |
1994 | break; | |
1995 | } | |
1996 | default: | |
1997 | assert_not_reached(); | |
1998 | } | |
1999 | ||
2000 | return result; | |
2001 | } | |
2002 | ||
2003 | static bool token_match_attr(UdevRuleToken *token, sd_device *dev, UdevEvent *event) { | |
2004 | char nbuf[UDEV_NAME_SIZE], vbuf[UDEV_NAME_SIZE]; | |
2005 | const char *name, *value; | |
2006 | int r; | |
2007 | ||
2008 | assert(token); | |
2009 | assert(IN_SET(token->type, TK_M_ATTR, TK_M_PARENTS_ATTR)); | |
2010 | assert(dev); | |
2011 | assert(event); | |
2012 | ||
2013 | name = token->data; | |
2014 | ||
2015 | switch (token->attr_subst_type) { | |
2016 | case SUBST_TYPE_FORMAT: | |
2017 | if (!apply_format_attr(event, token, nbuf, sizeof(nbuf), "sysfs attribute name")) | |
2018 | return false; | |
2019 | ||
2020 | name = nbuf; | |
2021 | _fallthrough_; | |
2022 | case SUBST_TYPE_PLAIN: | |
2023 | r = sd_device_get_sysattr_value(dev, name, &value); | |
2024 | if (r < 0) { | |
2025 | log_event_trace_errno(event, token, r, "Cannot read sysfs attribute%s%s%s: %m", | |
2026 | name != token->data ? " \"" : "", | |
2027 | name != token->data ? name : "", | |
2028 | name != token->data ? "\"" : ""); | |
2029 | return false; | |
2030 | } | |
2031 | ||
2032 | /* remove trailing whitespace, if not asked to match for it */ | |
2033 | if (FLAGS_SET(token->match_type, MATCH_REMOVE_TRAILING_WHITESPACE)) { | |
2034 | strscpy(vbuf, sizeof(vbuf), value); | |
2035 | value = delete_trailing_chars(vbuf, NULL); | |
2036 | } | |
2037 | ||
2038 | return token_match_string(event, token, value, /* log_result = */ true); | |
2039 | ||
2040 | case SUBST_TYPE_SUBSYS: | |
2041 | r = udev_resolve_subsys_kernel(name, vbuf, sizeof(vbuf), true); | |
2042 | if (r < 0) { | |
2043 | log_event_trace_errno(event, token, r, "Cannot read sysfs attribute: %m"); | |
2044 | return false; | |
2045 | } | |
2046 | ||
2047 | /* remove trailing whitespace, if not asked to match for it */ | |
2048 | if (FLAGS_SET(token->match_type, MATCH_REMOVE_TRAILING_WHITESPACE)) | |
2049 | delete_trailing_chars(vbuf, NULL); | |
2050 | ||
2051 | return token_match_string(event, token, vbuf, /* log_result = */ true); | |
2052 | ||
2053 | default: | |
2054 | assert_not_reached(); | |
2055 | } | |
2056 | } | |
2057 | ||
2058 | static int get_property_from_string(char *line, char **ret_key, char **ret_value) { | |
2059 | char *key, *val; | |
2060 | size_t len; | |
2061 | ||
2062 | assert(line); | |
2063 | assert(ret_key); | |
2064 | assert(ret_value); | |
2065 | ||
2066 | /* find key */ | |
2067 | key = skip_leading_chars(line, NULL); | |
2068 | ||
2069 | /* comment or empty line */ | |
2070 | if (IN_SET(key[0], '#', '\0')) { | |
2071 | *ret_key = *ret_value = NULL; | |
2072 | return 0; | |
2073 | } | |
2074 | ||
2075 | /* split key/value */ | |
2076 | val = strchr(key, '='); | |
2077 | if (!val) | |
2078 | return -EINVAL; | |
2079 | *val++ = '\0'; | |
2080 | ||
2081 | key = strstrip(key); | |
2082 | if (isempty(key)) | |
2083 | return -EINVAL; | |
2084 | ||
2085 | val = strstrip(val); | |
2086 | if (isempty(val)) | |
2087 | return -EINVAL; | |
2088 | ||
2089 | /* unquote */ | |
2090 | if (IN_SET(val[0], '"', '\'')) { | |
2091 | len = strlen(val); | |
2092 | if (len == 1 || val[len-1] != val[0]) | |
2093 | return -EINVAL; | |
2094 | val[len-1] = '\0'; | |
2095 | val++; | |
2096 | } | |
2097 | ||
2098 | *ret_key = key; | |
2099 | *ret_value = val; | |
2100 | return 1; | |
2101 | } | |
2102 | ||
2103 | static int attr_subst_subdir(char attr[static UDEV_PATH_SIZE]) { | |
2104 | _cleanup_closedir_ DIR *dir = NULL; | |
2105 | char buf[UDEV_PATH_SIZE], *p; | |
2106 | const char *tail; | |
2107 | size_t len, size; | |
2108 | bool truncated; | |
2109 | ||
2110 | assert(attr); | |
2111 | ||
2112 | tail = strstr(attr, "/*/"); | |
2113 | if (!tail) | |
2114 | return 0; | |
2115 | ||
2116 | len = tail - attr + 1; /* include slash at the end */ | |
2117 | tail += 2; /* include slash at the beginning */ | |
2118 | ||
2119 | p = buf; | |
2120 | size = sizeof(buf); | |
2121 | size -= strnpcpy_full(&p, size, attr, len, &truncated); | |
2122 | if (truncated) | |
2123 | return -ENOENT; | |
2124 | ||
2125 | dir = opendir(buf); | |
2126 | if (!dir) | |
2127 | return -errno; | |
2128 | ||
2129 | FOREACH_DIRENT_ALL(de, dir, break) { | |
2130 | if (de->d_name[0] == '.') | |
2131 | continue; | |
2132 | ||
2133 | strscpyl_full(p, size, &truncated, de->d_name, tail, NULL); | |
2134 | if (truncated) | |
2135 | continue; | |
2136 | ||
2137 | if (faccessat(dirfd(dir), p, F_OK, 0) < 0) | |
2138 | continue; | |
2139 | ||
2140 | strcpy(attr, buf); | |
2141 | return 0; | |
2142 | } | |
2143 | ||
2144 | return -ENOENT; | |
2145 | } | |
2146 | ||
2147 | static size_t udev_replace_ifname_strict(char *str) { | |
2148 | size_t replaced = 0; | |
2149 | ||
2150 | assert(str); | |
2151 | ||
2152 | /* See ifname_valid_full(). */ | |
2153 | ||
2154 | for (char *p = str; *p != '\0'; p++) | |
2155 | if (!ifname_valid_char(*p)) { | |
2156 | *p = '_'; | |
2157 | replaced++; | |
2158 | } | |
2159 | ||
2160 | return replaced; | |
2161 | } | |
2162 | ||
2163 | static void udev_replace_ifname(UdevEvent *event, UdevRuleToken *token, char *buf) { | |
2164 | assert(event); | |
2165 | assert(token); | |
2166 | assert(buf); | |
2167 | ||
2168 | size_t count; | |
2169 | if (naming_scheme_has(NAMING_REPLACE_STRICTLY)) | |
2170 | count = udev_replace_ifname_strict(buf); | |
2171 | else | |
2172 | count = udev_replace_chars(buf, "/"); | |
2173 | if (count > 0) | |
2174 | log_event_trace(event, token, | |
2175 | "Replaced %zu character(s) from network interface name, results to \"%s\"", | |
2176 | count, buf); | |
2177 | } | |
2178 | ||
2179 | static void udev_replace_chars_and_log(UdevEvent *event, UdevRuleToken *token, char *buf, const char *allow, const char *what) { | |
2180 | assert(event); | |
2181 | assert(token); | |
2182 | assert(buf); | |
2183 | assert(what); | |
2184 | ||
2185 | size_t count = udev_replace_chars(buf, allow); | |
2186 | if (count > 0) | |
2187 | log_event_trace(event, token, | |
2188 | "Replaced %zu character(s) from %s, results to \"%s\"", | |
2189 | count, what, buf); | |
2190 | } | |
2191 | ||
2192 | static int udev_rule_apply_token_to_event( | |
2193 | UdevRuleToken *token, | |
2194 | sd_device *dev, | |
2195 | UdevEvent *event) { | |
2196 | ||
2197 | int r; | |
2198 | ||
2199 | assert(token); | |
2200 | assert(dev); | |
2201 | assert(event); | |
2202 | ||
2203 | /* This returns the following values: | |
2204 | * 0 on the current token does not match the event, | |
2205 | * 1 on the current token matches the event, and | |
2206 | * negative errno on some critical errors. */ | |
2207 | ||
2208 | switch (token->type) { | |
2209 | case TK_M_ACTION: { | |
2210 | sd_device_action_t a; | |
2211 | ||
2212 | r = sd_device_get_action(dev, &a); | |
2213 | if (r < 0) | |
2214 | return log_event_error_errno(event, token, r, "Failed to get uevent action type: %m"); | |
2215 | ||
2216 | return token_match_string(event, token, device_action_to_string(a), /* log_result = */ true); | |
2217 | } | |
2218 | case TK_M_DEVPATH: { | |
2219 | const char *val; | |
2220 | ||
2221 | r = sd_device_get_devpath(dev, &val); | |
2222 | if (r < 0) | |
2223 | return log_event_error_errno(event, token, r, "Failed to get devpath: %m"); | |
2224 | ||
2225 | return token_match_string(event, token, val, /* log_result = */ true); | |
2226 | } | |
2227 | case TK_M_KERNEL: | |
2228 | case TK_M_PARENTS_KERNEL: { | |
2229 | const char *val; | |
2230 | ||
2231 | r = sd_device_get_sysname(dev, &val); | |
2232 | if (r < 0) | |
2233 | return log_event_error_errno(event, token, r, "Failed to get sysname: %m"); | |
2234 | ||
2235 | return token_match_string(event, token, val, /* log_result = */ true); | |
2236 | } | |
2237 | case TK_M_DEVLINK: | |
2238 | FOREACH_DEVICE_DEVLINK(dev, val) | |
2239 | if (token_match_string(event, token, strempty(startswith(val, "/dev/")), /* log_result = */ false) == (token->op == OP_MATCH)) | |
2240 | return log_event_result(event, token, token->op == OP_MATCH); | |
2241 | return log_event_result(event, token, token->op == OP_NOMATCH); | |
2242 | ||
2243 | case TK_M_NAME: | |
2244 | return token_match_string(event, token, event->name, /* log_result = */ true); | |
2245 | ||
2246 | case TK_M_ENV: { | |
2247 | const char *val = NULL; | |
2248 | ||
2249 | (void) device_get_property_value_with_fallback(dev, token->data, event->worker ? event->worker->properties : NULL, &val); | |
2250 | ||
2251 | return token_match_string(event, token, val, /* log_result = */ true); | |
2252 | } | |
2253 | case TK_M_CONST: { | |
2254 | const char *val, *k = token->data; | |
2255 | ||
2256 | if (streq(k, "arch")) | |
2257 | val = architecture_to_string(uname_architecture()); | |
2258 | else if (streq(k, "virt")) | |
2259 | val = virtualization_to_string(detect_virtualization()); | |
2260 | else if (streq(k, "cvm")) | |
2261 | val = confidential_virtualization_to_string(detect_confidential_virtualization()); | |
2262 | else | |
2263 | assert_not_reached(); | |
2264 | return token_match_string(event, token, val, /* log_result = */ true); | |
2265 | } | |
2266 | case TK_M_TAG: | |
2267 | case TK_M_PARENTS_TAG: | |
2268 | FOREACH_DEVICE_CURRENT_TAG(dev, val) | |
2269 | if (token_match_string(event, token, val, /* log_result = */ false) == (token->op == OP_MATCH)) | |
2270 | return log_event_result(event, token, token->op == OP_MATCH); | |
2271 | return log_event_result(event, token, token->op == OP_NOMATCH); | |
2272 | ||
2273 | case TK_M_SUBSYSTEM: | |
2274 | case TK_M_PARENTS_SUBSYSTEM: { | |
2275 | const char *val; | |
2276 | ||
2277 | r = sd_device_get_subsystem(dev, &val); | |
2278 | if (r == -ENOENT) | |
2279 | val = NULL; | |
2280 | else if (r < 0) | |
2281 | return log_event_error_errno(event, token, r, "Failed to get subsystem: %m"); | |
2282 | ||
2283 | return token_match_string(event, token, val, /* log_result = */ true); | |
2284 | } | |
2285 | case TK_M_DRIVER: | |
2286 | case TK_M_PARENTS_DRIVER: { | |
2287 | const char *val; | |
2288 | ||
2289 | r = sd_device_get_driver(dev, &val); | |
2290 | if (r == -ENOENT) | |
2291 | val = NULL; | |
2292 | else if (r < 0) | |
2293 | return log_event_error_errno(event, token, r, "Failed to get driver: %m"); | |
2294 | ||
2295 | return token_match_string(event, token, val, /* log_result = */ true); | |
2296 | } | |
2297 | case TK_M_ATTR: | |
2298 | case TK_M_PARENTS_ATTR: | |
2299 | return token_match_attr(token, dev, event); | |
2300 | ||
2301 | case TK_M_SYSCTL: { | |
2302 | _cleanup_free_ char *value = NULL; | |
2303 | char buf[UDEV_PATH_SIZE]; | |
2304 | ||
2305 | if (!apply_format_attr(event, token, buf, sizeof(buf), "sysctl entry name")) | |
2306 | return false; | |
2307 | ||
2308 | r = sysctl_read(sysctl_normalize(buf), &value); | |
2309 | if (r < 0 && r != -ENOENT) | |
2310 | return log_event_error_errno(event, token, r, "Failed to read sysctl \"%s\": %m", buf); | |
2311 | ||
2312 | return token_match_string(event, token, strstrip(value), /* log_result = */ true); | |
2313 | } | |
2314 | case TK_M_TEST: { | |
2315 | mode_t mode = PTR_TO_MODE(token->data); | |
2316 | char buf[UDEV_PATH_SIZE]; | |
2317 | struct stat statbuf; | |
2318 | bool match; | |
2319 | ||
2320 | if (!apply_format_value(event, token, buf, sizeof(buf), "file name")) | |
2321 | return false; | |
2322 | ||
2323 | if (!path_is_absolute(buf) && | |
2324 | udev_resolve_subsys_kernel(buf, buf, sizeof(buf), false) < 0) { | |
2325 | char tmp[UDEV_PATH_SIZE]; | |
2326 | const char *val; | |
2327 | ||
2328 | r = sd_device_get_syspath(dev, &val); | |
2329 | if (r < 0) | |
2330 | return log_event_error_errno(event, token, r, "Failed to get syspath: %m"); | |
2331 | ||
2332 | bool truncated; | |
2333 | strscpy_full(tmp, sizeof(tmp), buf, &truncated); | |
2334 | assert(!truncated); | |
2335 | strscpyl_full(buf, sizeof(buf), &truncated, val, "/", tmp, NULL); | |
2336 | if (truncated) | |
2337 | return log_event_result(event, token, false); | |
2338 | } | |
2339 | ||
2340 | r = attr_subst_subdir(buf); | |
2341 | if (r == -ENOENT) | |
2342 | return log_event_result(event, token, token->op == OP_NOMATCH); | |
2343 | if (r < 0) | |
2344 | return log_event_error_errno(event, token, r, "Failed to test for the existence of \"%s\": %m", buf); | |
2345 | ||
2346 | if (stat(buf, &statbuf) < 0) { | |
2347 | if (errno != ENOENT) | |
2348 | log_event_warning_errno(event, token, errno, "Failed to stat \"%s\", ignoring: %m", buf); | |
2349 | return log_event_result(event, token, token->op == OP_NOMATCH); | |
2350 | } | |
2351 | ||
2352 | if (mode == MODE_INVALID) | |
2353 | return log_event_result(event, token, token->op == OP_MATCH); | |
2354 | ||
2355 | match = (statbuf.st_mode & mode) > 0; | |
2356 | return log_event_result(event, token, token->op == (match ? OP_MATCH : OP_NOMATCH)); | |
2357 | } | |
2358 | case TK_M_PROGRAM: { | |
2359 | char buf[UDEV_LINE_SIZE], result[UDEV_LINE_SIZE]; | |
2360 | ||
2361 | event->program_result = mfree(event->program_result); | |
2362 | ||
2363 | if (!apply_format_value(event, token, buf, sizeof(buf), "command")) | |
2364 | return false; | |
2365 | ||
2366 | log_event_debug(event, token, "Running command \"%s\"", buf); | |
2367 | ||
2368 | r = udev_event_spawn(event, /* accept_failure = */ true, buf, result, sizeof(result), NULL); | |
2369 | if (r != 0) { | |
2370 | if (r < 0) | |
2371 | log_event_warning_errno(event, token, r, "Failed to execute \"%s\": %m", buf); | |
2372 | else /* returned value is positive when program fails */ | |
2373 | log_event_debug(event, token, "Command \"%s\" returned %d (error)", buf, r); | |
2374 | return log_event_result(event, token, token->op == OP_NOMATCH); | |
2375 | } | |
2376 | ||
2377 | delete_trailing_chars(result, "\n"); | |
2378 | udev_replace_chars_and_log(event, token, result, UDEV_ALLOWED_CHARS_INPUT, "command output"); | |
2379 | ||
2380 | event->program_result = strdup(result); | |
2381 | return log_event_result(event, token, token->op == OP_MATCH); | |
2382 | } | |
2383 | case TK_M_IMPORT_FILE: { | |
2384 | _cleanup_fclose_ FILE *f = NULL; | |
2385 | char buf[UDEV_PATH_SIZE]; | |
2386 | ||
2387 | if (!apply_format_value(event, token, buf, sizeof(buf), "file name to be imported")) | |
2388 | return false; | |
2389 | ||
2390 | log_event_debug(event, token, "Importing properties from \"%s\"", buf); | |
2391 | ||
2392 | f = fopen(buf, "re"); | |
2393 | if (!f) { | |
2394 | if (errno != ENOENT) | |
2395 | return log_event_error_errno(event, token, errno, "Failed to open \"%s\": %m", buf); | |
2396 | return log_event_result(event, token, token->op == OP_NOMATCH); | |
2397 | } | |
2398 | ||
2399 | for (;;) { | |
2400 | _cleanup_free_ char *line = NULL; | |
2401 | char *key, *value; | |
2402 | ||
2403 | r = read_line(f, LONG_LINE_MAX, &line); | |
2404 | if (r < 0) { | |
2405 | log_event_debug_errno(event, token, r, "Failed to read \"%s\", ignoring: %m", buf); | |
2406 | return log_event_result(event, token, token->op == OP_NOMATCH); | |
2407 | } | |
2408 | if (r == 0) | |
2409 | return log_event_result(event, token, token->op == OP_MATCH); | |
2410 | ||
2411 | r = get_property_from_string(line, &key, &value); | |
2412 | if (r < 0) { | |
2413 | log_event_debug_errno(event, token, r, | |
2414 | "Failed to parse key and value from \"%s\", ignoring: %m", | |
2415 | line); | |
2416 | continue; | |
2417 | } | |
2418 | if (r == 0) | |
2419 | continue; | |
2420 | ||
2421 | r = device_add_property(dev, key, value); | |
2422 | if (r < 0) | |
2423 | return log_event_error_errno(event, token, r, | |
2424 | "Failed to add property %s=%s: %m", | |
2425 | key, value); | |
2426 | log_event_trace(event, token, "Imported property \"%s=%s\".", key, value); | |
2427 | } | |
2428 | ||
2429 | assert_not_reached(); | |
2430 | } | |
2431 | case TK_M_IMPORT_PROGRAM: { | |
2432 | _cleanup_strv_free_ char **lines = NULL; | |
2433 | char buf[UDEV_LINE_SIZE], result[UDEV_LINE_SIZE]; | |
2434 | bool truncated; | |
2435 | ||
2436 | if (!apply_format_value(event, token, buf, sizeof(buf), "command")) | |
2437 | return false; | |
2438 | ||
2439 | log_event_debug(event, token, "Importing properties from results of \"%s\"", buf); | |
2440 | ||
2441 | r = udev_event_spawn(event, /* accept_failure = */ true, buf, result, sizeof result, &truncated); | |
2442 | if (r != 0) { | |
2443 | if (r < 0) | |
2444 | log_event_warning_errno(event, token, r, "Failed to execute \"%s\", ignoring: %m", buf); | |
2445 | else /* returned value is positive when program fails */ | |
2446 | log_event_debug(event, token, "Command \"%s\" returned %d (error), ignoring", buf, r); | |
2447 | return log_event_result(event, token, token->op == OP_NOMATCH); | |
2448 | } | |
2449 | ||
2450 | if (truncated) { | |
2451 | log_event_debug(event, token, "Result of \"%s\" is too long and truncated, ignoring the last line of the result.", buf); | |
2452 | ||
2453 | /* Drop the last line. */ | |
2454 | bool found = false; | |
2455 | for (char *p = PTR_SUB1(buf + strlen(buf), buf); p; p = PTR_SUB1(p, buf)) | |
2456 | if (strchr(NEWLINE, *p)) { | |
2457 | *p = '\0'; | |
2458 | found = true; | |
2459 | break; | |
2460 | } | |
2461 | if (!found) | |
2462 | buf[0] = '\0'; | |
2463 | } | |
2464 | ||
2465 | r = strv_split_newlines_full(&lines, result, EXTRACT_RETAIN_ESCAPE); | |
2466 | if (r == -ENOMEM) | |
2467 | return log_oom(); | |
2468 | if (r < 0) { | |
2469 | log_event_warning_errno(event, token, r, | |
2470 | "Failed to extract lines from result of command \"%s\", ignoring: %m", buf); | |
2471 | return log_event_result(event, token, false); | |
2472 | } | |
2473 | ||
2474 | STRV_FOREACH(line, lines) { | |
2475 | char *key, *value; | |
2476 | ||
2477 | r = get_property_from_string(*line, &key, &value); | |
2478 | if (r < 0) { | |
2479 | log_event_debug_errno(event, token, r, | |
2480 | "Failed to parse key and value from \"%s\", ignoring: %m", | |
2481 | *line); | |
2482 | continue; | |
2483 | } | |
2484 | if (r == 0) | |
2485 | continue; | |
2486 | ||
2487 | r = device_add_property(dev, key, value); | |
2488 | if (r < 0) | |
2489 | return log_event_error_errno(event, token, r, | |
2490 | "Failed to add property %s=%s: %m", | |
2491 | key, value); | |
2492 | log_event_trace(event, token, "Imported property \"%s=%s\".", key, value); | |
2493 | } | |
2494 | ||
2495 | return log_event_result(event, token, token->op == OP_MATCH); | |
2496 | } | |
2497 | case TK_M_IMPORT_BUILTIN: { | |
2498 | UdevBuiltinCommand cmd = PTR_TO_UDEV_BUILTIN_CMD(token->data); | |
2499 | assert(cmd >= 0 && cmd < _UDEV_BUILTIN_MAX); | |
2500 | unsigned mask = 1U << (int) cmd; | |
2501 | char buf[UDEV_LINE_SIZE]; | |
2502 | ||
2503 | if (udev_builtin_run_once(cmd)) { | |
2504 | /* check if we ran already */ | |
2505 | if (event->builtin_run & mask) { | |
2506 | log_event_debug(event, token, "Builtin command \"%s\" has already run, skipping.", | |
2507 | udev_builtin_name(cmd)); | |
2508 | /* return the result from earlier run */ | |
2509 | return log_event_result(event, token, token->op == (event->builtin_ret & mask ? OP_NOMATCH : OP_MATCH)); | |
2510 | } | |
2511 | /* mark as ran */ | |
2512 | event->builtin_run |= mask; | |
2513 | } | |
2514 | ||
2515 | if (!apply_format_value(event, token, buf, sizeof(buf), "builtin command")) | |
2516 | return false; | |
2517 | ||
2518 | log_event_debug(event, token, "Importing properties from results of builtin command \"%s\".", buf); | |
2519 | ||
2520 | r = udev_builtin_run(event, cmd, buf); | |
2521 | if (r < 0) { | |
2522 | /* remember failure */ | |
2523 | log_event_debug_errno(event, token, r, "Failed to run builtin \"%s\": %m", buf); | |
2524 | event->builtin_ret |= mask; | |
2525 | } | |
2526 | return log_event_result(event, token, token->op == (r >= 0 ? OP_MATCH : OP_NOMATCH)); | |
2527 | } | |
2528 | case TK_M_IMPORT_DB: { | |
2529 | const char *val; | |
2530 | ||
2531 | if (!event->dev_db_clone) | |
2532 | return log_event_result(event, token, token->op == OP_NOMATCH); | |
2533 | r = sd_device_get_property_value(event->dev_db_clone, token->value, &val); | |
2534 | if (r == -ENOENT) | |
2535 | return log_event_result(event, token, token->op == OP_NOMATCH); | |
2536 | if (r < 0) | |
2537 | return log_event_error_errno(event, token, r, | |
2538 | "Failed to get property \"%s\" from database: %m", | |
2539 | token->value); | |
2540 | ||
2541 | r = device_add_property(dev, token->value, val); | |
2542 | if (r < 0) | |
2543 | return log_event_error_errno(event, token, r, "Failed to add property \"%s=%s\": %m", | |
2544 | token->value, val); | |
2545 | log_event_trace(event, token, "Imported property \"%s=%s\".", token->value, val); | |
2546 | ||
2547 | return log_event_result(event, token, token->op == OP_MATCH); | |
2548 | } | |
2549 | case TK_M_IMPORT_CMDLINE: { | |
2550 | _cleanup_free_ char *value = NULL; | |
2551 | ||
2552 | r = proc_cmdline_get_key(token->value, PROC_CMDLINE_VALUE_OPTIONAL, &value); | |
2553 | if (r < 0) | |
2554 | return log_event_error_errno(event, token, r, | |
2555 | "Failed to read \"%s\" option from /proc/cmdline: %m", | |
2556 | token->value); | |
2557 | if (r == 0) | |
2558 | return log_event_result(event, token, token->op == OP_NOMATCH); | |
2559 | ||
2560 | const char *val = value ?: "1"; | |
2561 | r = device_add_property(dev, token->value, val); | |
2562 | if (r < 0) | |
2563 | return log_event_error_errno(event, token, r, "Failed to add property \"%s=%s\": %m", | |
2564 | token->value, val); | |
2565 | log_event_trace(event, token, "Imported property \"%s=%s\".", token->value, val); | |
2566 | ||
2567 | return log_event_result(event, token, token->op == OP_MATCH); | |
2568 | } | |
2569 | case TK_M_IMPORT_PARENT: { | |
2570 | char buf[UDEV_PATH_SIZE]; | |
2571 | ||
2572 | if (!apply_format_value(event, token, buf, sizeof(buf), "property name")) | |
2573 | return false; | |
2574 | ||
2575 | sd_device *parent; | |
2576 | r = sd_device_get_parent(dev, &parent); | |
2577 | if (ERRNO_IS_NEG_DEVICE_ABSENT(r)) | |
2578 | return log_event_result(event, token, token->op == OP_NOMATCH); | |
2579 | if (r < 0) | |
2580 | return log_event_error_errno(event, token, r, "Failed to get parent device: %m"); | |
2581 | ||
2582 | bool have = false; | |
2583 | FOREACH_DEVICE_PROPERTY(parent, key, val) { | |
2584 | if (fnmatch(buf, key, 0) != 0) | |
2585 | continue; | |
2586 | ||
2587 | r = device_add_property(dev, key, val); | |
2588 | if (r < 0) | |
2589 | return log_event_error_errno(event, token, r, "Failed to add property \"%s=%s\": %m", key, val); | |
2590 | log_event_trace(event, token, "Imported property \"%s=%s\".", key, val); | |
2591 | have = true; | |
2592 | } | |
2593 | ||
2594 | return log_event_result(event, token, token->op == (have ? OP_MATCH : OP_NOMATCH)); | |
2595 | } | |
2596 | case TK_M_RESULT: | |
2597 | return token_match_string(event, token, event->program_result, /* log_result = */ true); | |
2598 | ||
2599 | case TK_A_OPTIONS_DUMP: { | |
2600 | log_event_info(event, token, "Dumping current state:"); | |
2601 | ||
2602 | _cleanup_(memstream_done) MemStream m = {}; | |
2603 | FILE *f = memstream_init(&m); | |
2604 | if (!f) | |
2605 | return log_oom(); | |
2606 | ||
2607 | (void) dump_event(event, SD_JSON_FORMAT_OFF, f); | |
2608 | ||
2609 | _cleanup_free_ char *buf = NULL; | |
2610 | r = memstream_finalize(&m, &buf, NULL); | |
2611 | if (r < 0) | |
2612 | log_event_warning_errno(event, token, r, "Failed to finalize memory stream, ignoring: %m"); | |
2613 | else | |
2614 | log_info("%s", buf); | |
2615 | ||
2616 | log_event_info(event, token, "DONE"); | |
2617 | return true; | |
2618 | } | |
2619 | case TK_A_OPTIONS_STRING_ESCAPE_NONE: | |
2620 | event->esc = ESCAPE_NONE; | |
2621 | return log_event_done(event, token); | |
2622 | ||
2623 | case TK_A_OPTIONS_STRING_ESCAPE_REPLACE: | |
2624 | event->esc = ESCAPE_REPLACE; | |
2625 | return log_event_done(event, token); | |
2626 | ||
2627 | case TK_A_OPTIONS_DB_PERSIST: | |
2628 | device_set_db_persist(dev); | |
2629 | return log_event_done(event, token); | |
2630 | ||
2631 | case TK_A_OPTIONS_INOTIFY_WATCH: | |
2632 | if (event->inotify_watch_final) | |
2633 | return log_event_final_set(event, token); | |
2634 | ||
2635 | if (token->op == OP_ASSIGN_FINAL) | |
2636 | event->inotify_watch_final = true; | |
2637 | ||
2638 | event->inotify_watch = token->data; | |
2639 | return log_event_done(event, token); | |
2640 | ||
2641 | case TK_A_OPTIONS_DEVLINK_PRIORITY: | |
2642 | device_set_devlink_priority(dev, PTR_TO_INT(token->data)); | |
2643 | return log_event_done(event, token); | |
2644 | ||
2645 | case TK_A_OPTIONS_LOG_LEVEL: { | |
2646 | int level = PTR_TO_INT(token->data); | |
2647 | ||
2648 | if (level < 0) | |
2649 | level = event->default_log_level; | |
2650 | ||
2651 | if (event->event_mode == EVENT_UDEV_WORKER) | |
2652 | log_set_max_level(level); | |
2653 | else { | |
2654 | _cleanup_free_ char *level_str = NULL; | |
2655 | (void) log_level_to_string_alloc(level, &level_str); | |
2656 | log_event_debug(event, token, "Running in test mode, skipping changing maximum log level to %s.", strna(level_str)); | |
2657 | } | |
2658 | ||
2659 | if (level == LOG_DEBUG && !event->log_level_was_debug) { | |
2660 | /* The log level becomes LOG_DEBUG at first time. Let's log basic information. */ | |
2661 | if (event->event_mode == EVENT_UDEV_WORKER) | |
2662 | log_device_uevent(dev, "The log level is changed to 'debug' while processing device"); | |
2663 | event->log_level_was_debug = true; | |
2664 | } | |
2665 | ||
2666 | return log_event_done(event, token); | |
2667 | } | |
2668 | case TK_A_OWNER: { | |
2669 | char owner[UDEV_NAME_SIZE]; | |
2670 | ||
2671 | if (event->owner_final) | |
2672 | return log_event_final_set(event, token); | |
2673 | ||
2674 | if (token->op == OP_ASSIGN_FINAL) | |
2675 | event->owner_final = true; | |
2676 | ||
2677 | if (!apply_format_value(event, token, owner, sizeof(owner), "user name")) | |
2678 | return true; | |
2679 | ||
2680 | _cleanup_(user_record_unrefp) UserRecord *ur = NULL; | |
2681 | r = userdb_by_name(owner, &USERDB_MATCH_ROOT_AND_SYSTEM, | |
2682 | USERDB_SUPPRESS_SHADOW | USERDB_PARSE_NUMERIC | USERDB_SYNTHESIZE_NUMERIC, | |
2683 | &ur); | |
2684 | if (r == -ESRCH) | |
2685 | log_event_error_errno(event, token, r, "Unknown user \"%s\", ignoring.", owner); | |
2686 | else if (r == -ENOEXEC) | |
2687 | log_event_error(event, token, "User \"%s\" is not a system user, ignoring.", owner); | |
2688 | else if (r < 0) | |
2689 | log_event_error_errno(event, token, r, "Failed to resolve user \"%s\", ignoring: %m", owner); | |
2690 | else { | |
2691 | event->uid = ur->uid; | |
2692 | log_event_debug(event, token, "Set owner: %s("UID_FMT")", owner, event->uid); | |
2693 | } | |
2694 | return true; | |
2695 | } | |
2696 | case TK_A_GROUP: { | |
2697 | char group[UDEV_NAME_SIZE]; | |
2698 | ||
2699 | if (event->group_final) | |
2700 | return log_event_final_set(event, token); | |
2701 | ||
2702 | if (token->op == OP_ASSIGN_FINAL) | |
2703 | event->group_final = true; | |
2704 | ||
2705 | if (!apply_format_value(event, token, group, sizeof(group), "group name")) | |
2706 | return true; | |
2707 | ||
2708 | _cleanup_(group_record_unrefp) GroupRecord *gr = NULL; | |
2709 | r = groupdb_by_name(group, &USERDB_MATCH_ROOT_AND_SYSTEM, | |
2710 | USERDB_SUPPRESS_SHADOW | USERDB_PARSE_NUMERIC | USERDB_SYNTHESIZE_NUMERIC, | |
2711 | &gr); | |
2712 | if (r == -ESRCH) | |
2713 | log_event_error_errno(event, token, r, "Unknown group \"%s\", ignoring.", group); | |
2714 | else if (r == -ENOEXEC) | |
2715 | log_event_error(event, token, "Group \"%s\" is not a system group, ignoring.", group); | |
2716 | else if (r < 0) | |
2717 | log_event_error_errno(event, token, r, "Failed to resolve group \"%s\", ignoring: %m", group); | |
2718 | else { | |
2719 | event->gid = gr->gid; | |
2720 | log_event_debug(event, token, "Set group: %s("GID_FMT")", group, event->gid); | |
2721 | } | |
2722 | return true; | |
2723 | } | |
2724 | case TK_A_MODE: { | |
2725 | char mode_str[UDEV_NAME_SIZE]; | |
2726 | ||
2727 | if (event->mode_final) | |
2728 | return log_event_final_set(event, token); | |
2729 | ||
2730 | if (token->op == OP_ASSIGN_FINAL) | |
2731 | event->mode_final = true; | |
2732 | ||
2733 | if (!apply_format_value(event, token, mode_str, sizeof(mode_str), "mode")) | |
2734 | return true; | |
2735 | ||
2736 | r = parse_mode(mode_str, &event->mode); | |
2737 | if (r < 0) | |
2738 | log_event_error_errno(event, token, r, "Failed to parse mode \"%s\", ignoring: %m", mode_str); | |
2739 | else | |
2740 | log_event_debug(event, token, "Set mode: %#o", event->mode); | |
2741 | return true; | |
2742 | } | |
2743 | case TK_A_OWNER_ID: | |
2744 | if (event->owner_final) | |
2745 | return log_event_final_set(event, token); | |
2746 | ||
2747 | if (token->op == OP_ASSIGN_FINAL) | |
2748 | event->owner_final = true; | |
2749 | ||
2750 | event->uid = PTR_TO_UID(ASSERT_PTR(token->data)); | |
2751 | log_event_debug(event, token, "Set owner ID: %u", event->uid); | |
2752 | return true; | |
2753 | ||
2754 | case TK_A_GROUP_ID: | |
2755 | if (event->group_final) | |
2756 | return log_event_final_set(event, token); | |
2757 | ||
2758 | if (token->op == OP_ASSIGN_FINAL) | |
2759 | event->group_final = true; | |
2760 | ||
2761 | event->gid = PTR_TO_GID(ASSERT_PTR(token->data)); | |
2762 | log_event_debug(event, token, "Set group ID: %u", event->gid); | |
2763 | return true; | |
2764 | ||
2765 | case TK_A_MODE_ID: | |
2766 | if (event->mode_final) | |
2767 | return log_event_final_set(event, token); | |
2768 | ||
2769 | if (token->op == OP_ASSIGN_FINAL) | |
2770 | event->mode_final = true; | |
2771 | ||
2772 | event->mode = PTR_TO_MODE(ASSERT_PTR(token->data)); | |
2773 | log_event_debug(event, token, "Set mode: %#o", event->mode); | |
2774 | return true; | |
2775 | ||
2776 | case TK_A_SECLABEL: { | |
2777 | _cleanup_free_ char *name = NULL, *label = NULL; | |
2778 | char label_str[UDEV_LINE_SIZE] = {}; | |
2779 | ||
2780 | name = strdup(token->data); | |
2781 | if (!name) | |
2782 | return log_oom(); | |
2783 | ||
2784 | if (!apply_format_value(event, token, label_str, sizeof(label_str), "security label")) | |
2785 | return true; | |
2786 | ||
2787 | if (!isempty(label_str)) | |
2788 | label = strdup(label_str); | |
2789 | else | |
2790 | label = strdup(token->value); | |
2791 | if (!label) | |
2792 | return log_oom(); | |
2793 | ||
2794 | if (token->op == OP_ASSIGN) | |
2795 | ordered_hashmap_clear(event->seclabel_list); | |
2796 | ||
2797 | r = ordered_hashmap_ensure_put(&event->seclabel_list, &trivial_hash_ops_free_free, name, label); | |
2798 | if (r == -ENOMEM) | |
2799 | return log_oom(); | |
2800 | if (r < 0) | |
2801 | return log_event_error_errno(event, token, r, "Failed to store security label \"%s=%s\": %m", name, label); | |
2802 | ||
2803 | log_event_debug(event, token, "Set security label: %s=%s", name, label); | |
2804 | ||
2805 | TAKE_PTR(name); | |
2806 | TAKE_PTR(label); | |
2807 | return true; | |
2808 | } | |
2809 | case TK_A_ENV: { | |
2810 | const char *val, *name = token->data; | |
2811 | char value_new[UDEV_NAME_SIZE], *p = value_new; | |
2812 | size_t l = sizeof(value_new); | |
2813 | ||
2814 | if (isempty(token->value)) { | |
2815 | if (token->op == OP_ADD) | |
2816 | return log_event_done(event, token); | |
2817 | ||
2818 | r = device_add_property(dev, name, NULL); | |
2819 | if (r < 0) | |
2820 | return log_event_error_errno(event, token, r, "Failed to remove property \"%s\": %m", name); | |
2821 | log_event_trace(event, token, "Removed property \"%s\".", name); | |
2822 | return true; | |
2823 | } | |
2824 | ||
2825 | if (token->op == OP_ADD && | |
2826 | device_get_property_value_with_fallback(dev, name, event->worker ? event->worker->properties : NULL, &val) >= 0) { | |
2827 | bool truncated; | |
2828 | l = strpcpyl_full(&p, l, &truncated, val, " ", NULL); | |
2829 | if (truncated) { | |
2830 | log_event_warning(event, token, | |
2831 | "The buffer for the property is full, refusing to append new property \"%s=%s\".", | |
2832 | name, token->value); | |
2833 | return true; | |
2834 | } | |
2835 | } | |
2836 | ||
2837 | if (!apply_format_value(event, token, p, l, "property value")) | |
2838 | return true; | |
2839 | ||
2840 | if (event->esc == ESCAPE_REPLACE) | |
2841 | udev_replace_chars_and_log(event, token, p, /* allow = */ NULL, "property value"); | |
2842 | ||
2843 | r = device_add_property(dev, name, value_new); | |
2844 | if (r < 0) | |
2845 | return log_event_error_errno(event, token, r, "Failed to set property \"%s=%s\": %m", name, value_new); | |
2846 | log_event_trace(event, token, "Set property \"%s=%s\".", name, value_new); | |
2847 | return true; | |
2848 | } | |
2849 | case TK_A_TAG: { | |
2850 | char buf[UDEV_PATH_SIZE]; | |
2851 | ||
2852 | if (!apply_format_value(event, token, buf, sizeof(buf), "tag name")) | |
2853 | return true; | |
2854 | ||
2855 | if (token->op == OP_REMOVE) { | |
2856 | device_remove_tag(dev, buf); | |
2857 | log_event_trace(event, token, "Removed tag \"%s\".", buf); | |
2858 | return true; | |
2859 | } | |
2860 | ||
2861 | assert(IN_SET(token->op, OP_ASSIGN, OP_ADD)); | |
2862 | ||
2863 | if (token->op == OP_ASSIGN) | |
2864 | device_cleanup_tags(dev); | |
2865 | ||
2866 | r = device_add_tag(dev, buf, /* both = */ true); | |
2867 | if (r == -ENOMEM) | |
2868 | return log_oom(); | |
2869 | if (r < 0) | |
2870 | log_event_warning_errno(event, token, r, "Failed to %s tag \"%s\", ignoring: %m", | |
2871 | token->op == OP_ASSIGN ? "set" : "add", buf); | |
2872 | else | |
2873 | log_event_trace(event, token, "%s tag \"%s\".", token->op == OP_ASSIGN ? "Set" : "Added", buf); | |
2874 | return true; | |
2875 | } | |
2876 | case TK_A_NAME: { | |
2877 | char buf[UDEV_PATH_SIZE]; | |
2878 | ||
2879 | if (event->name_final) | |
2880 | return log_event_final_set(event, token); | |
2881 | ||
2882 | if (token->op == OP_ASSIGN_FINAL) | |
2883 | event->name_final = true; | |
2884 | ||
2885 | if (sd_device_get_ifindex(dev, NULL) < 0) { | |
2886 | log_event_warning(event, token, "Only network interfaces can be renamed, ignoring."); | |
2887 | return true; | |
2888 | } | |
2889 | ||
2890 | if (!apply_format_value(event, token, buf, sizeof(buf), "network interface name")) | |
2891 | return true; | |
2892 | ||
2893 | if (IN_SET(event->esc, ESCAPE_UNSET, ESCAPE_REPLACE)) | |
2894 | udev_replace_ifname(event, token, buf); | |
2895 | ||
2896 | r = free_and_strdup_warn(&event->name, buf); | |
2897 | if (r < 0) | |
2898 | return r; | |
2899 | ||
2900 | log_event_debug(event, token, "Set network interface name: %s", event->name); | |
2901 | return true; | |
2902 | } | |
2903 | case TK_A_DEVLINK: { | |
2904 | char buf[UDEV_PATH_SIZE]; | |
2905 | ||
2906 | if (event->devlink_final) | |
2907 | return log_event_final_set(event, token); | |
2908 | ||
2909 | if (sd_device_get_devnum(dev, NULL) < 0) { | |
2910 | log_event_debug(event, token, "Device does not have device node, ignoring to manage device node symlink."); | |
2911 | return true; | |
2912 | } | |
2913 | ||
2914 | if (token->op == OP_ASSIGN_FINAL) | |
2915 | event->devlink_final = true; | |
2916 | ||
2917 | if (IN_SET(token->op, OP_ASSIGN, OP_ASSIGN_FINAL)) | |
2918 | device_cleanup_devlinks(dev); | |
2919 | ||
2920 | if (!apply_format_full(event, token, token->value, buf, sizeof(buf), | |
2921 | /* replace_whitespace = */ event->esc != ESCAPE_NONE, | |
2922 | "symbolic link path")) | |
2923 | return true; | |
2924 | ||
2925 | /* By default or string_escape=none, allow multiple symlinks separated by spaces. */ | |
2926 | if (event->esc == ESCAPE_UNSET) | |
2927 | udev_replace_chars_and_log(event, token, buf, /* allow = */ "/ ", "device node symlink"); | |
2928 | else if (event->esc == ESCAPE_REPLACE) | |
2929 | udev_replace_chars_and_log(event, token, buf, /* allow = */ "/", "device node symlink"); | |
2930 | ||
2931 | for (const char *p = buf;;) { | |
2932 | _cleanup_free_ char *path = NULL; | |
2933 | ||
2934 | r = extract_first_word(&p, &path, NULL, EXTRACT_RETAIN_ESCAPE); | |
2935 | if (r == -ENOMEM) | |
2936 | return log_oom(); | |
2937 | if (r < 0) { | |
2938 | log_warning_errno(r, "Failed to extract first path in device node symlinks, ignoring: %m"); | |
2939 | return true; | |
2940 | } | |
2941 | if (r == 0) | |
2942 | return true; | |
2943 | ||
2944 | if (token->op == OP_REMOVE) { | |
2945 | r = device_remove_devlink(dev, path); | |
2946 | if (r == -ENOMEM) | |
2947 | return log_oom(); | |
2948 | if (r < 0) | |
2949 | log_event_warning_errno(event, token, r, "Failed to remove device node symlink \"%s\", ignoring: %m", path); | |
2950 | else if (r > 0) | |
2951 | log_event_debug(event, token, "Removed device node symlink \"%s\"", path); | |
2952 | } else { | |
2953 | r = device_add_devlink(dev, path); | |
2954 | if (r == -ENOMEM) | |
2955 | return log_oom(); | |
2956 | if (r < 0) | |
2957 | log_event_warning_errno(event, token, r, "Failed to add device node symlink \"%s\", ignoring: %m", path); | |
2958 | else if (r > 0) | |
2959 | log_event_debug(event, token, "Added device node symlink \"%s\".", path); | |
2960 | } | |
2961 | } | |
2962 | assert_not_reached(); | |
2963 | } | |
2964 | case TK_A_ATTR: { | |
2965 | char buf[UDEV_PATH_SIZE], value[UDEV_NAME_SIZE]; | |
2966 | const char *key = token->data; | |
2967 | ||
2968 | /* First, try to resolve "[<SUBSYSTEM>/<KERNEL>]<attribute>" format. */ | |
2969 | r = udev_resolve_subsys_kernel(key, buf, sizeof(buf), false); | |
2970 | if (r == -ENOMEM) | |
2971 | return log_oom(); | |
2972 | if (ERRNO_IS_NEG_DEVICE_ABSENT(r)) { | |
2973 | log_event_warning_errno(event, token, r, "Failed to resolve sysfs attribute \"%s\", ignoring: %m", key); | |
2974 | return true; | |
2975 | } | |
2976 | if (r < 0) { | |
2977 | /* If not, make the path to sysfs attribute absolute, to make '*' resolvable by attr_subst_subdir(). */ | |
2978 | const char *syspath; | |
2979 | r = sd_device_get_syspath(dev, &syspath); | |
2980 | if (r < 0) | |
2981 | return log_event_error_errno(event, token, r, "Failed to get syspath: %m"); | |
2982 | ||
2983 | bool truncated; | |
2984 | strscpyl_full(buf, sizeof(buf), &truncated, syspath, "/", key, NULL); | |
2985 | if (truncated) { | |
2986 | log_event_warning(event, token, | |
2987 | "The path to the attribute \"%s/%s\" is too long, refusing to set the attribute.", | |
2988 | syspath, key); | |
2989 | return true; | |
2990 | } | |
2991 | ||
2992 | /* Resolve '*' in the path. */ | |
2993 | r = attr_subst_subdir(buf); | |
2994 | if (r < 0) { | |
2995 | log_event_error_errno(event, token, r, "Could not find file matches \"%s\", ignoring: %m", buf); | |
2996 | return true; | |
2997 | } | |
2998 | } | |
2999 | ||
3000 | /* Then, make the path relative again. This also checks if the path being inside of the sysfs. */ | |
3001 | _cleanup_free_ char *resolved = NULL; | |
3002 | _cleanup_close_ int fd = -EBADF; | |
3003 | r = device_chase(dev, buf, /* flags = */ 0, &resolved, &fd); | |
3004 | if (r < 0) { | |
3005 | log_event_error_errno(event, token, r, "Could not chase sysfs attribute \"%s\", ignoring: %m", buf); | |
3006 | return true; | |
3007 | } | |
3008 | ||
3009 | /* Apply formatting to the value. */ | |
3010 | if (!apply_format_value(event, token, value, sizeof(value), "attribute value")) | |
3011 | return true; | |
3012 | ||
3013 | if (EVENT_MODE_DESTRUCTIVE(event)) { | |
3014 | log_event_debug(event, token, "Writing \"%s\" to sysfs attribute \"%s\".", value, resolved); | |
3015 | r = sd_device_set_sysattr_value(dev, resolved, value); | |
3016 | if (r < 0) | |
3017 | log_event_error_errno(event, token, r, "Failed to write \"%s\" to sysfs attribute \"%s\", ignoring: %m", value, resolved); | |
3018 | else { | |
3019 | event_cache_written_sysattr(event, resolved, value); | |
3020 | log_event_done(event, token); | |
3021 | } | |
3022 | } else { | |
3023 | log_event_debug(event, token, "Running in test mode, skipping writing \"%s\" to sysfs attribute \"%s\".", value, resolved); | |
3024 | ||
3025 | /* We assume the attribute is writable if the path points to a regular file, and cache | |
3026 | * the value to make it shown by OPTIONS="dump" or obtained by later ATTR match token. */ | |
3027 | r = fd_verify_regular(fd); | |
3028 | if (r < 0 && !ERRNO_IS_NEG_PRIVILEGE(r)) | |
3029 | log_event_error_errno(event, token, r, "Failed to verify sysfs attribute \"%s\" is a regular file: %m", resolved); | |
3030 | else { | |
3031 | event_cache_written_sysattr(event, resolved, value); | |
3032 | ||
3033 | _cleanup_free_ char *copied = strdup(value); | |
3034 | if (!copied) | |
3035 | return log_oom(); | |
3036 | ||
3037 | r = device_cache_sysattr_value(dev, resolved, value, /* error = */ 0); | |
3038 | if (r < 0) | |
3039 | log_event_warning_errno(event, token, r, "Failed to cache sysfs attribute \"%s\", ignoring: %m", resolved); | |
3040 | else if (r > 0) { | |
3041 | TAKE_PTR(resolved); | |
3042 | TAKE_PTR(copied); | |
3043 | } | |
3044 | } | |
3045 | } | |
3046 | return true; | |
3047 | } | |
3048 | case TK_A_SYSCTL: { | |
3049 | char buf[UDEV_PATH_SIZE], value[UDEV_NAME_SIZE]; | |
3050 | ||
3051 | if (!apply_format_attr(event, token, buf, sizeof(buf), "sysctl entry name")) | |
3052 | return true; | |
3053 | ||
3054 | if (!apply_format_value(event, token, value, sizeof(value), "sysctl value")) | |
3055 | return true; | |
3056 | ||
3057 | sysctl_normalize(buf); | |
3058 | ||
3059 | if (EVENT_MODE_DESTRUCTIVE(event)) { | |
3060 | log_event_debug(event, token, "Writing \"%s\" to sysctl entry \"%s\".", value, buf); | |
3061 | r = sysctl_write(buf, value); | |
3062 | if (r < 0) | |
3063 | log_event_error_errno(event, token, r, "Failed to write \"%s\" to sysctl entry \"%s\", ignoring: %m", value, buf); | |
3064 | else { | |
3065 | event_cache_written_sysctl(event, buf, value); | |
3066 | log_event_done(event, token); | |
3067 | } | |
3068 | } else { | |
3069 | log_event_debug(event, token, "Running in test mode, skipping writing \"%s\" to sysctl entry \"%s\".", value, buf); | |
3070 | ||
3071 | _cleanup_free_ char *path = path_join("/proc/sys/", buf); | |
3072 | if (!path) | |
3073 | return log_oom(); | |
3074 | ||
3075 | r = verify_regular_at(AT_FDCWD, path, /* follow = */ true); | |
3076 | if (r < 0 && !ERRNO_IS_NEG_PRIVILEGE(r)) | |
3077 | log_event_error_errno(event, token, r, "Failed to verify sysctl entry \"%s\" is a regular file: %m", buf); | |
3078 | else | |
3079 | event_cache_written_sysctl(event, buf, value); | |
3080 | } | |
3081 | return true; | |
3082 | } | |
3083 | case TK_A_RUN_BUILTIN: | |
3084 | case TK_A_RUN_PROGRAM: { | |
3085 | _cleanup_free_ char *cmd = NULL; | |
3086 | char buf[UDEV_LINE_SIZE]; | |
3087 | ||
3088 | if (event->run_final) | |
3089 | return log_event_final_set(event, token); | |
3090 | ||
3091 | if (token->op == OP_ASSIGN_FINAL) | |
3092 | event->run_final = true; | |
3093 | ||
3094 | if (IN_SET(token->op, OP_ASSIGN, OP_ASSIGN_FINAL)) | |
3095 | ordered_hashmap_clear(event->run_list); | |
3096 | ||
3097 | if (!apply_format_value(event, token, buf, sizeof(buf), "command")) | |
3098 | return true; | |
3099 | ||
3100 | cmd = strdup(buf); | |
3101 | if (!cmd) | |
3102 | return log_oom(); | |
3103 | ||
3104 | r = ordered_hashmap_ensure_put(&event->run_list, &trivial_hash_ops_free, cmd, token->data); | |
3105 | if (r < 0) | |
3106 | return log_event_error_errno(event, token, r, "Failed to store command \"%s\": %m", cmd); | |
3107 | ||
3108 | log_event_debug(event, token, "Set command: %s", cmd); | |
3109 | TAKE_PTR(cmd); | |
3110 | return true; | |
3111 | } | |
3112 | case TK_A_OPTIONS_STATIC_NODE: | |
3113 | /* do nothing for events. */ | |
3114 | return true; | |
3115 | ||
3116 | default: | |
3117 | assert_not_reached(); | |
3118 | } | |
3119 | ||
3120 | assert_not_reached(); | |
3121 | } | |
3122 | ||
3123 | static int udev_rule_apply_parent_token_to_event(UdevRuleToken *head_token, UdevEvent *event) { | |
3124 | int r; | |
3125 | ||
3126 | assert(head_token); | |
3127 | assert(token_is_for_parents(head_token)); | |
3128 | assert(event); | |
3129 | ||
3130 | UdevRuleLine *line = head_token->rule_line; | |
3131 | if (event->trace) { | |
3132 | _cleanup_free_ char *joined = NULL; | |
3133 | ||
3134 | LIST_FOREACH(tokens, token, head_token) | |
3135 | if (token_is_for_parents(token)) | |
3136 | (void) strextend_with_separator(&joined, ", ", token->token_str); | |
3137 | else | |
3138 | break; | |
3139 | ||
3140 | log_event_line(event, line, "Checking conditions for parent devices (including self): %s", strna(joined)); | |
3141 | } | |
3142 | ||
3143 | event->dev_parent = ASSERT_PTR(event->dev); | |
3144 | ||
3145 | for (;;) { | |
3146 | LIST_FOREACH(tokens, token, head_token) { | |
3147 | if (!token_is_for_parents(token)) { | |
3148 | r = 1; /* avoid false maybe-uninitialized warning */ | |
3149 | break; /* All parent tokens match. */ | |
3150 | } | |
3151 | ||
3152 | r = udev_rule_apply_token_to_event(token, event->dev_parent, event); | |
3153 | if (r < 0) | |
3154 | return r; | |
3155 | if (r == 0) | |
3156 | break; | |
3157 | } | |
3158 | if (r > 0) { | |
3159 | if (event->trace) { | |
3160 | const char *s = NULL; | |
3161 | (void) sd_device_get_syspath(event->dev_parent, &s); | |
3162 | log_event_line(event, line, "Parent device \"%s\" passed all parent conditions.", strna(s)); | |
3163 | } | |
3164 | return true; | |
3165 | } | |
3166 | ||
3167 | if (sd_device_get_parent(event->dev_parent, &event->dev_parent) < 0) { | |
3168 | event->dev_parent = NULL; | |
3169 | log_event_line(event, line, "No parent device passed parent conditions."); | |
3170 | return false; | |
3171 | } | |
3172 | } | |
3173 | } | |
3174 | ||
3175 | static int udev_rule_apply_line_to_event( | |
3176 | UdevRuleLine *line, | |
3177 | UdevEvent *event, | |
3178 | UdevRuleLine **next_line) { | |
3179 | ||
3180 | UdevRuleLineType mask = LINE_HAS_GOTO | LINE_UPDATE_SOMETHING; | |
3181 | bool parents_done = false; | |
3182 | sd_device_action_t action; | |
3183 | int r; | |
3184 | ||
3185 | assert(line); | |
3186 | assert(event); | |
3187 | assert(next_line); | |
3188 | ||
3189 | r = sd_device_get_action(event->dev, &action); | |
3190 | if (r < 0) | |
3191 | return r; | |
3192 | ||
3193 | if (action != SD_DEVICE_REMOVE) { | |
3194 | if (sd_device_get_devnum(event->dev, NULL) >= 0) | |
3195 | mask |= LINE_HAS_DEVLINK; | |
3196 | ||
3197 | if (sd_device_get_ifindex(event->dev, NULL) >= 0) | |
3198 | mask |= LINE_HAS_NAME; | |
3199 | } | |
3200 | ||
3201 | if ((line->type & mask) == 0) | |
3202 | return 0; | |
3203 | ||
3204 | event->esc = ESCAPE_UNSET; | |
3205 | ||
3206 | DEVICE_TRACE_POINT(rules_apply_line, event->dev, line->rule_file->filename, line->line_number); | |
3207 | ||
3208 | LIST_FOREACH(tokens, token, line->tokens) { | |
3209 | if (token_is_for_parents(token)) { | |
3210 | if (parents_done) | |
3211 | continue; | |
3212 | ||
3213 | r = udev_rule_apply_parent_token_to_event(token, event); | |
3214 | if (r <= 0) | |
3215 | return r; | |
3216 | ||
3217 | parents_done = true; | |
3218 | continue; | |
3219 | } | |
3220 | ||
3221 | r = udev_rule_apply_token_to_event(token, event->dev, event); | |
3222 | if (r <= 0) | |
3223 | return r; | |
3224 | } | |
3225 | ||
3226 | if (line->goto_line) { | |
3227 | log_event_line(event, line, "GOTO=%s", strna(line->goto_label)); | |
3228 | *next_line = line->goto_line; /* update next_line only when the line has GOTO token. */ | |
3229 | } | |
3230 | ||
3231 | return 0; | |
3232 | } | |
3233 | ||
3234 | int udev_rules_apply_to_event(UdevRules *rules, UdevEvent *event) { | |
3235 | int r; | |
3236 | ||
3237 | assert(rules); | |
3238 | assert(event); | |
3239 | ||
3240 | LIST_FOREACH(rule_files, file, rules->rule_files) | |
3241 | LIST_FOREACH_WITH_NEXT(rule_lines, line, next_line, file->rule_lines) { | |
3242 | r = udev_rule_apply_line_to_event(line, event, &next_line); | |
3243 | if (r < 0) | |
3244 | return r; | |
3245 | } | |
3246 | ||
3247 | return 0; | |
3248 | } | |
3249 | ||
3250 | static int udev_rule_line_apply_static_dev_perms(UdevRuleLine *rule_line) { | |
3251 | _cleanup_strv_free_ char **tags = NULL; | |
3252 | uid_t uid = UID_INVALID; | |
3253 | gid_t gid = GID_INVALID; | |
3254 | mode_t mode = MODE_INVALID; | |
3255 | int r; | |
3256 | ||
3257 | assert(rule_line); | |
3258 | ||
3259 | if (!FLAGS_SET(rule_line->type, LINE_HAS_STATIC_NODE)) | |
3260 | return 0; | |
3261 | ||
3262 | LIST_FOREACH(tokens, token, rule_line->tokens) | |
3263 | if (token->type == TK_A_OWNER_ID) | |
3264 | uid = PTR_TO_UID(token->data); | |
3265 | else if (token->type == TK_A_GROUP_ID) | |
3266 | gid = PTR_TO_GID(token->data); | |
3267 | else if (token->type == TK_A_MODE_ID) | |
3268 | mode = PTR_TO_MODE(token->data); | |
3269 | else if (token->type == TK_A_TAG) { | |
3270 | r = strv_extend(&tags, token->value); | |
3271 | if (r < 0) | |
3272 | return log_oom(); | |
3273 | } else if (token->type == TK_A_OPTIONS_STATIC_NODE) { | |
3274 | r = static_node_apply_permissions(token->value, mode, uid, gid, tags); | |
3275 | if (r < 0) | |
3276 | return r; | |
3277 | } | |
3278 | ||
3279 | return 0; | |
3280 | } | |
3281 | ||
3282 | int udev_rules_apply_static_dev_perms(UdevRules *rules) { | |
3283 | int r; | |
3284 | ||
3285 | assert(rules); | |
3286 | ||
3287 | LIST_FOREACH(rule_files, file, rules->rule_files) | |
3288 | LIST_FOREACH(rule_lines, line, file->rule_lines) { | |
3289 | r = udev_rule_line_apply_static_dev_perms(line); | |
3290 | if (r < 0) | |
3291 | return r; | |
3292 | } | |
3293 | ||
3294 | return 0; | |
3295 | } | |
3296 | ||
3297 | static const char* const resolve_name_timing_table[_RESOLVE_NAME_TIMING_MAX] = { | |
3298 | [RESOLVE_NAME_NEVER] = "never", | |
3299 | [RESOLVE_NAME_LATE] = "late", | |
3300 | [RESOLVE_NAME_EARLY] = "early", | |
3301 | }; | |
3302 | ||
3303 | DEFINE_STRING_TABLE_LOOKUP(resolve_name_timing, ResolveNameTiming); |