6 * Copyright (C) 2003,2004 Greg Kroah-Hartman <greg@kroah.com>
7 * Copyright (C) 2003-2005 Kay Sievers <kay.sievers@vrfy.org>
10 * This program is free software; you can redistribute it and/or modify it
11 * under the terms of the GNU General Public License as published by the
12 * Free Software Foundation version 2 of the License.
14 * This program is distributed in the hope that it will be useful, but
15 * WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * General Public License for more details.
19 * You should have received a copy of the GNU General Public License along
20 * with this program; if not, write to the Free Software Foundation, Inc.,
21 * 675 Mass Ave, Cambridge, MA 02139, USA.
34 #include "udev_libc_wrapper.h"
36 #include "udev_utils.h"
38 #include "udev_rules.h"
40 LIST_HEAD(udev_rule_list);
42 static int add_config_dev(struct udev_rule *rule)
44 struct udev_rule *tmp_rule;
46 tmp_rule = malloc(sizeof(*tmp_rule));
49 memcpy(tmp_rule, rule, sizeof(struct udev_rule));
50 list_add_tail(&tmp_rule->node, &udev_rule_list);
52 dbg("name='%s', symlink='%s', bus='%s', id='%s', "
53 "sysfs_file[0]='%s', sysfs_value[0]='%s', "
54 "kernel='%s', program='%s', result='%s', "
55 "owner='%s', group='%s', mode=%#o, "
56 "all_partions=%u, ignore_remove=%u, ignore_device=%u, last_rule=%u",
57 rule->name, rule->symlink, rule->bus, rule->id,
58 rule->sysfs_pair[0].name, rule->sysfs_pair[0].value,
59 rule->kernel, rule->program, rule->result, rule->owner, rule->group, rule->mode,
60 rule->partitions, rule->ignore_remove, rule->ignore_device, rule->last_rule);
65 static int get_key(char **line, char **key, enum key_operation *operation, char **value)
75 while (isspace(linepos[0]) || linepos[0] == ',')
82 if (linepos[0] == '\0')
84 if (isspace(linepos[0]))
86 if (linepos[0] == '=')
88 if (linepos[0] == '+')
90 if (linepos[0] == '!')
94 /* remember end of key */
97 /* skip whitespace after key */
98 while (isspace(linepos[0]))
101 /* get operation type */
102 if (linepos[0] == '=' && linepos[1] == '=') {
103 *operation = KEY_OP_MATCH;
105 dbg("operator=match");
106 } else if (linepos[0] == '!' && linepos[1] == '=') {
107 *operation = KEY_OP_NOMATCH;
109 dbg("operator=nomatch");
110 } else if (linepos[0] == '+' && linepos[1] == '=') {
111 *operation = KEY_OP_ADD;
114 } else if (linepos[0] == '=') {
115 *operation = KEY_OP_ASSIGN;
117 dbg("operator=assign");
123 dbg("key='%s'", *key);
125 /* skip whitespace after operator */
126 while (isspace(linepos[0]))
130 if (linepos[0] == '"')
136 temp = strchr(linepos, '"');
141 dbg("value='%s'", *value);
143 /* move line to next key */
149 /* extract possible KEY{attr} */
150 static char *get_key_attribute(char *str)
155 attr = strchr(str, '{');
158 pos = strchr(attr, '}');
160 err("missing closing brace for format");
164 dbg("attribute='%s'", attr);
171 static int rules_parse(const char *filename)
173 char line[LINE_SIZE];
182 int program_given = 0;
185 struct udev_rule rule;
187 if (file_map(filename, &buf, &bufsize) != 0) {
188 err("can't open '%s' as rules file", filename);
191 dbg("reading '%s' as rules file", filename);
193 /* loop through the whole file */
196 while (cur < bufsize) {
199 count = buf_get_line(buf, bufsize, cur);
204 if (count >= sizeof(line)) {
205 info("line too long, rule skipped %s, line %d", filename, lineno);
209 /* eat the whitespace */
210 while ((count > 0) && isspace(bufline[0])) {
217 /* see if this is a comment */
218 if (bufline[0] == COMMENT_CHARACTER)
221 /* skip backslash and newline from multi line rules */
222 for (i = j = 0; i < count; i++) {
223 if (bufline[i] == '\\' && bufline[i+1] == '\n')
226 line[j++] = bufline[i];
229 dbg("read '%s'", line);
231 /* get all known keys */
232 memset(&rule, 0x00, sizeof(struct udev_rule));
239 enum key_operation operation = KEY_OP_UNSET;
241 retval = get_key(&linepos, &key, &operation, &value);
245 if (strcasecmp(key, KEY_KERNEL) == 0) {
246 strlcpy(rule.kernel, value, sizeof(rule.kernel));
247 rule.kernel_operation = operation;
252 if (strcasecmp(key, KEY_SUBSYSTEM) == 0) {
253 strlcpy(rule.subsystem, value, sizeof(rule.subsystem));
254 rule.subsystem_operation = operation;
259 if (strcasecmp(key, KEY_ACTION) == 0) {
260 strlcpy(rule.action, value, sizeof(rule.action));
261 rule.action_operation = operation;
266 if (strcasecmp(key, KEY_BUS) == 0) {
267 strlcpy(rule.bus, value, sizeof(rule.bus));
268 rule.bus_operation = operation;
273 if (strcasecmp(key, KEY_ID) == 0) {
274 strlcpy(rule.id, value, sizeof(rule.id));
275 rule.id_operation = operation;
280 if (strncasecmp(key, KEY_SYSFS, sizeof(KEY_SYSFS)-1) == 0) {
281 struct key_pair *pair;
283 if (rule.sysfs_pair_count >= KEY_SYSFS_PAIRS_MAX) {
284 err("skip rule, to many " KEY_SYSFS " keys in a single rule");
287 pair = &rule.sysfs_pair[rule.sysfs_pair_count];
288 attr = get_key_attribute(key + sizeof(KEY_SYSFS)-1);
290 err("error parsing " KEY_SYSFS " attribute");
293 strlcpy(pair->name, attr, sizeof(pair->name));
294 strlcpy(pair->value, value, sizeof(pair->value));
295 pair->operation = operation;
296 rule.sysfs_pair_count++;
301 if (strncasecmp(key, KEY_ENV, sizeof(KEY_ENV)-1) == 0) {
302 struct key_pair *pair;
304 if (rule.env_pair_count >= KEY_ENV_PAIRS_MAX) {
305 err("skip rule, to many " KEY_ENV " keys in a single rule");
308 pair = &rule.env_pair[rule.env_pair_count];
309 attr = get_key_attribute(key + sizeof(KEY_ENV)-1);
311 err("error parsing " KEY_ENV " attribute");
314 strlcpy(pair->name, attr, sizeof(pair->name));
315 strlcpy(pair->value, value, sizeof(pair->value));
316 pair->operation = operation;
317 rule.env_pair_count++;
322 if (strcasecmp(key, KEY_DRIVER) == 0) {
323 strlcpy(rule.driver, value, sizeof(rule.driver));
324 rule.driver_operation = operation;
329 if (strcasecmp(key, KEY_RESULT) == 0) {
330 strlcpy(rule.result, value, sizeof(rule.result));
331 rule.result_operation = operation;
336 if (strcasecmp(key, KEY_PROGRAM) == 0) {
337 strlcpy(rule.program, value, sizeof(rule.program));
338 rule.program_operation = operation;
344 if (strncasecmp(key, KEY_NAME, sizeof(KEY_NAME)-1) == 0) {
345 attr = get_key_attribute(key + sizeof(KEY_NAME)-1);
346 /* FIXME: remove old style options and make OPTIONS= mandatory */
348 if (strstr(attr, OPTION_PARTITIONS) != NULL) {
349 dbg("creation of partition nodes requested");
350 rule.partitions = DEFAULT_PARTITIONS_COUNT;
352 if (strstr(attr, OPTION_IGNORE_REMOVE) != NULL) {
353 dbg("remove event should be ignored");
354 rule.ignore_remove = 1;
357 if (value[0] != '\0')
358 strlcpy(rule.name, value, sizeof(rule.name));
360 rule.ignore_device = 1;
365 if (strcasecmp(key, KEY_SYMLINK) == 0) {
366 strlcpy(rule.symlink, value, sizeof(rule.symlink));
371 if (strcasecmp(key, KEY_OWNER) == 0) {
372 strlcpy(rule.owner, value, sizeof(rule.owner));
377 if (strcasecmp(key, KEY_GROUP) == 0) {
378 strlcpy(rule.group, value, sizeof(rule.group));
383 if (strcasecmp(key, KEY_MODE) == 0) {
384 rule.mode = strtol(value, NULL, 8);
389 if (strcasecmp(key, KEY_RUN) == 0) {
390 strlcpy(rule.run, value, sizeof(rule.run));
395 if (strcasecmp(key, KEY_OPTIONS) == 0) {
396 if (strstr(value, OPTION_LAST_RULE) != NULL) {
397 dbg("last rule to be applied");
400 if (strstr(value, OPTION_IGNORE_DEVICE) != NULL) {
401 dbg("device should be ignored");
402 rule.ignore_device = 1;
404 if (strstr(value, OPTION_IGNORE_REMOVE) != NULL) {
405 dbg("remove event should be ignored");
406 rule.ignore_remove = 1;
408 if (strstr(value, OPTION_PARTITIONS) != NULL) {
409 dbg("creation of partition nodes requested");
410 rule.partitions = DEFAULT_PARTITIONS_COUNT;
416 err("unknown key '%s'", key);
420 /* skip line if not any valid key was found */
424 if ((rule.result[0] != '\0') && (program_given == 0)) {
425 info(KEY_RESULT " is only useful when " KEY_PROGRAM " is called in any rule before");
429 rule.config_line = lineno;
430 strlcpy(rule.config_file, filename, sizeof(rule.config_file));
431 retval = add_config_dev(&rule);
433 dbg("add_config_dev returned with error %d", retval);
436 err("parse error %s, line %d:%d, rule skipped",
437 filename, lineno, (int) (linepos - line));
441 file_unmap(buf, bufsize);
445 int udev_rules_init(void)
450 if (stat(udev_rules_filename, &stats) != 0)
453 if ((stats.st_mode & S_IFMT) != S_IFDIR)
454 retval = rules_parse(udev_rules_filename);
456 struct name_entry *name_loop, *name_tmp;
457 LIST_HEAD(name_list);
459 retval = add_matching_files(&name_list, udev_rules_filename, RULEFILE_SUFFIX);
461 list_for_each_entry_safe(name_loop, name_tmp, &name_list, node) {
462 rules_parse(name_loop->name);
463 list_del(&name_loop->node);
470 void udev_rules_close(void)
472 struct udev_rule *rule;
473 struct udev_rule *temp_rule;
475 list_for_each_entry_safe(rule, temp_rule, &udev_rule_list, node) {
476 list_del(&rule->node);