6 * Copyright (C) 2003,2004 Greg Kroah-Hartman <greg@kroah.com>
9 * This program is free software; you can redistribute it and/or modify it
10 * under the terms of the GNU General Public License as published by the
11 * Free Software Foundation version 2 of the License.
13 * This program is distributed in the hope that it will be useful, but
14 * WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * General Public License for more details.
18 * You should have received a copy of the GNU General Public License along
19 * with this program; if not, write to the Free Software Foundation, Inc.,
20 * 675 Mass Ave, Cambridge, MA 02139, USA.
25 /* define this to enable parsing debugging also */
26 /* #define DEBUG_PARSER */
44 static int add_config_dev(struct config_device *new_dev)
46 struct config_device *tmp_dev;
48 tmp_dev = malloc(sizeof(*tmp_dev));
51 memcpy(tmp_dev, new_dev, sizeof(*tmp_dev));
52 list_add_tail(&tmp_dev->node, &config_device_list);
53 //dump_config_dev(tmp_dev);
57 void dump_config_dev(struct config_device *dev)
59 dbg_parse("name='%s', symlink='%s', bus='%s', place='%s', id='%s', "
60 "sysfs_file[0]='%s', sysfs_value[0]='%s', "
61 "kernel='%s', program='%s', result='%s'",
62 "owner='%s', group='%s', mode=%#o",
63 dev->name, dev->symlink, dev->bus, dev->place, dev->id,
64 dev->sysfs_pair[0].file, dev->sysfs_pair[0].value,
65 dev->kernel, dev->program, dev->result,
66 dev->owner, dev->group, dev->mode);
69 void dump_config_dev_list(void)
71 struct config_device *dev;
73 list_for_each_entry(dev, &config_device_list, node)
77 static int add_perm_dev(struct perm_device *new_dev)
79 struct perm_device *dev;
80 struct perm_device *tmp_dev;
82 /* update the values if we already have the device */
83 list_for_each_entry(dev, &perm_device_list, node) {
84 if (strcmp(new_dev->name, dev->name) != 0)
87 set_empty_perms(dev, new_dev->mode, new_dev->owner, new_dev->group);
91 /* not found, add new structure to the perm list */
92 tmp_dev = malloc(sizeof(*tmp_dev));
96 memcpy(tmp_dev, new_dev, sizeof(*tmp_dev));
97 list_add_tail(&tmp_dev->node, &perm_device_list);
98 //dump_perm_dev(tmp_dev);
102 void dump_perm_dev(struct perm_device *dev)
104 dbg_parse("name='%s', owner='%s', group='%s', mode=%#o",
105 dev->name, dev->owner, dev->group, dev->mode);
108 void dump_perm_dev_list(void)
110 struct perm_device *dev;
112 list_for_each_entry(dev, &perm_device_list, node)
116 /* extract possible KEY{attr} or KEY_attr */
117 static char *get_key_attribute(char *str)
122 attr = strchr(str, '{');
125 pos = strchr(attr, '}');
127 dbg("missing closing brace for format");
131 dbg("attribute='%s'", attr);
135 attr = strchr(str, '_');
138 dbg("attribute='%s'", attr);
145 static int namedev_parse_rules(char *filename)
157 int program_given = 0;
159 struct config_device dev;
161 if (file_map(filename, &buf, &bufsize) == 0) {
162 dbg("reading '%s' as rules file", filename);
164 dbg("can't open '%s' as rules file", filename);
168 /* loop through the whole file */
172 count = buf_get_line(buf, bufsize, cur);
174 strncpy(line, buf + cur, count);
183 dbg_parse("read '%s'", temp);
185 /* eat the whitespace */
186 while (isspace(*temp))
190 if ((*temp == '\0') || (*temp == '\n'))
193 /* see if this is a comment */
194 if (*temp == COMMENT_CHARACTER)
197 memset(&dev, 0x00, sizeof(struct config_device));
199 /* get all known keys */
201 retval = parse_get_pair(&temp, &temp2, &temp3);
205 if (strcasecmp(temp2, FIELD_BUS) == 0) {
206 strfieldcpy(dev.bus, temp3);
210 if (strcasecmp(temp2, FIELD_ID) == 0) {
211 strfieldcpy(dev.id, temp3);
215 if (strcasecmp(temp2, FIELD_PLACE) == 0) {
216 strfieldcpy(dev.place, temp3);
220 if (strncasecmp(temp2, FIELD_SYSFS, sizeof(FIELD_SYSFS)-1) == 0) {
221 struct sysfs_pair *pair = &dev.sysfs_pair[0];
222 int sysfs_pair_num = 0;
224 /* find first unused pair */
225 while (pair->file[0] != '\0') {
227 if (sysfs_pair_num >= MAX_SYSFS_PAIRS) {
234 attr = get_key_attribute(temp2 + sizeof(FIELD_SYSFS)-1);
236 dbg("error parsing " FIELD_SYSFS " attribute");
239 strfieldcpy(pair->file, attr);
240 strfieldcpy(pair->value, temp3);
245 if (strcasecmp(temp2, FIELD_KERNEL) == 0) {
246 strfieldcpy(dev.kernel, temp3);
250 if (strcasecmp(temp2, FIELD_PROGRAM) == 0) {
252 strfieldcpy(dev.program, temp3);
256 if (strcasecmp(temp2, FIELD_RESULT) == 0) {
257 strfieldcpy(dev.result, temp3);
261 if (strncasecmp(temp2, FIELD_NAME, sizeof(FIELD_NAME)-1) == 0) {
262 attr = get_key_attribute(temp2 + sizeof(FIELD_NAME)-1);
264 if (strcasecmp(attr, ATTR_PARTITIONS) == 0) {
265 dbg_parse("creation of partition nodes requested");
266 dev.partitions = PARTITIONS_COUNT;
268 strfieldcpy(dev.name, temp3);
272 if (strcasecmp(temp2, FIELD_SYMLINK) == 0) {
273 strfieldcpy(dev.symlink, temp3);
277 if (strcasecmp(temp2, FIELD_OWNER) == 0) {
278 strfieldcpy(dev.owner, temp3);
282 if (strcasecmp(temp2, FIELD_GROUP) == 0) {
283 strfieldcpy(dev.group, temp3);
287 if (strcasecmp(temp2, FIELD_MODE) == 0) {
288 dev.mode = strtol(temp3, NULL, 8);
292 dbg("unknown type of field '%s'", temp2);
296 /* simple plausibility checks for given keys */
297 if ((dev.sysfs_pair[0].file[0] == '\0') ^
298 (dev.sysfs_pair[0].value[0] == '\0')) {
299 dbg("inconsistency in " FIELD_SYSFS " key");
303 if ((dev.result[0] != '\0') && (program_given == 0)) {
304 dbg(FIELD_RESULT " is only useful when "
305 FIELD_PROGRAM " is called in any rule before");
309 dev.config_line = lineno;
310 strfieldcpy(dev.config_file, filename);
311 retval = add_config_dev(&dev);
313 dbg("add_config_dev returned with error %d", retval);
316 dbg("%s:%d:%d: parse error, rule skipped",
317 filename, lineno, temp - line);
321 file_unmap(buf, bufsize);
325 static int namedev_parse_permissions(char *filename)
335 struct perm_device dev;
337 if (file_map(filename, &buf, &bufsize) == 0) {
338 dbg("reading '%s' as permissions file", filename);
340 dbg("can't open '%s' as permissions file", filename);
344 /* loop through the whole file */
347 count = buf_get_line(buf, bufsize, cur);
349 strncpy(line, buf + cur, count);
357 dbg_parse("read '%s'", temp);
359 /* eat the whitespace at the beginning of the line */
360 while (isspace(*temp))
364 if ((*temp == '\0') || (*temp == '\n'))
367 /* see if this is a comment */
368 if (*temp == COMMENT_CHARACTER)
371 memset(&dev, 0x00, sizeof(dev));
374 temp2 = strsep(&temp, ":");
376 dbg("cannot parse line '%s'", line);
379 strfieldcpy(dev.name, temp2);
381 temp2 = strsep(&temp, ":");
383 dbg("cannot parse line '%s'", line);
386 strfieldcpy(dev.owner, temp2);
388 temp2 = strsep(&temp, ":");
390 dbg("cannot parse line '%s'", line);
393 strfieldcpy(dev.group, temp2);
396 dbg("cannot parse line '%s'", line);
399 dev.mode = strtol(temp, NULL, 8);
401 dbg_parse("name='%s', owner='%s', group='%s', mode=%#o",
402 dev.name, dev.owner, dev.group, dev.mode);
404 retval = add_perm_dev(&dev);
406 dbg("add_perm_dev returned with error %d", retval);
412 file_unmap(buf, bufsize);
416 int namedev_init_rules()
420 stat(udev_rules_filename, &stats);
421 if ((stats.st_mode & S_IFMT) != S_IFDIR)
422 return namedev_parse_rules(udev_rules_filename);
424 return call_foreach_file(namedev_parse_rules,
425 udev_rules_filename, RULEFILE_SUFFIX);
428 int namedev_init_permissions()
432 stat(udev_permissions_filename, &stats);
433 if ((stats.st_mode & S_IFMT) != S_IFDIR)
434 return namedev_parse_permissions(udev_permissions_filename);
436 return call_foreach_file(namedev_parse_permissions,
437 udev_permissions_filename, PERMFILE_SUFFIX);