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Commit | Line | Data |
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19feb351 GKH |
1 | /* |
2 | * namedev_parse.c | |
3 | * | |
4 | * Userspace devfs | |
5 | * | |
274812b5 | 6 | * Copyright (C) 2003,2004 Greg Kroah-Hartman <greg@kroah.com> |
19feb351 GKH |
7 | * |
8 | * | |
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. | |
12 | * | |
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. | |
17 | * | |
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. | |
21 | * | |
22 | */ | |
23 | ||
851cd18d GKH |
24 | #ifdef DEBUG |
25 | /* define this to enable parsing debugging also */ | |
19feb351 | 26 | /* #define DEBUG_PARSER */ |
851cd18d | 27 | #endif |
19feb351 GKH |
28 | |
29 | #include <stddef.h> | |
30 | #include <stdlib.h> | |
31 | #include <string.h> | |
32 | #include <stdio.h> | |
19feb351 GKH |
33 | #include <ctype.h> |
34 | #include <unistd.h> | |
e41245cb | 35 | #include <sys/stat.h> |
19feb351 GKH |
36 | #include <errno.h> |
37 | ||
38 | #include "udev.h" | |
c81b35c0 | 39 | #include "udev_lib.h" |
54988802 | 40 | #include "logging.h" |
19feb351 GKH |
41 | #include "namedev.h" |
42 | ||
e41016d3 | 43 | |
a8b01705 GKH |
44 | static int add_config_dev(struct config_device *new_dev) |
45 | { | |
46 | struct config_device *tmp_dev; | |
47 | ||
48 | tmp_dev = malloc(sizeof(*tmp_dev)); | |
49 | if (tmp_dev == NULL) | |
50 | return -ENOMEM; | |
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); | |
54 | return 0; | |
55 | } | |
56 | ||
19feb351 GKH |
57 | void dump_config_dev(struct config_device *dev) |
58 | { | |
ac28b86d KS |
59 | dbg_parse("name='%s', symlink='%s', bus='%s', place='%s', id='%s', " |
60 | "sysfs_file[0]='%s', sysfs_value[0]='%s', " | |
3e441450 | 61 | "kernel='%s', program='%s', result='%s'" |
e41016d3 | 62 | "owner='%s', group='%s', mode=%#o", |
ac28b86d KS |
63 | dev->name, dev->symlink, dev->bus, dev->place, dev->id, |
64 | dev->sysfs_pair[0].file, dev->sysfs_pair[0].value, | |
2731fd98 | 65 | dev->kernel, dev->program, dev->result, |
e41016d3 | 66 | dev->owner, dev->group, dev->mode); |
19feb351 GKH |
67 | } |
68 | ||
69 | void dump_config_dev_list(void) | |
70 | { | |
843d1a84 | 71 | struct config_device *dev; |
19feb351 | 72 | |
843d1a84 | 73 | list_for_each_entry(dev, &config_device_list, node) |
19feb351 | 74 | dump_config_dev(dev); |
19feb351 | 75 | } |
61219c75 | 76 | |
e41016d3 KS |
77 | static int add_perm_dev(struct perm_device *new_dev) |
78 | { | |
79 | struct perm_device *dev; | |
80 | struct perm_device *tmp_dev; | |
81 | ||
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) | |
85 | continue; | |
86 | ||
87 | set_empty_perms(dev, new_dev->mode, new_dev->owner, new_dev->group); | |
88 | return 0; | |
89 | } | |
90 | ||
91 | /* not found, add new structure to the perm list */ | |
92 | tmp_dev = malloc(sizeof(*tmp_dev)); | |
93 | if (!tmp_dev) | |
94 | return -ENOMEM; | |
95 | ||
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); | |
99 | return 0; | |
100 | } | |
101 | ||
61219c75 GKH |
102 | void dump_perm_dev(struct perm_device *dev) |
103 | { | |
104 | dbg_parse("name='%s', owner='%s', group='%s', mode=%#o", | |
105 | dev->name, dev->owner, dev->group, dev->mode); | |
106 | } | |
107 | ||
108 | void dump_perm_dev_list(void) | |
109 | { | |
843d1a84 | 110 | struct perm_device *dev; |
61219c75 | 111 | |
843d1a84 | 112 | list_for_each_entry(dev, &perm_device_list, node) |
61219c75 | 113 | dump_perm_dev(dev); |
61219c75 GKH |
114 | } |
115 | ||
bb738647 KS |
116 | /* extract possible KEY{attr} or KEY_attr */ |
117 | static char *get_key_attribute(char *str) | |
118 | { | |
119 | char *pos; | |
120 | char *attr; | |
121 | ||
bb738647 KS |
122 | attr = strchr(str, '{'); |
123 | if (attr != NULL) { | |
124 | attr++; | |
125 | pos = strchr(attr, '}'); | |
126 | if (pos == NULL) { | |
127 | dbg("missing closing brace for format"); | |
128 | return NULL; | |
129 | } | |
130 | pos[0] = '\0'; | |
131 | dbg("attribute='%s'", attr); | |
132 | return attr; | |
133 | } | |
134 | ||
50e5de03 KS |
135 | attr = strchr(str, '_'); |
136 | if (attr != NULL) { | |
137 | attr++; | |
138 | dbg("attribute='%s'", attr); | |
139 | return attr; | |
140 | } | |
141 | ||
bb738647 KS |
142 | return NULL; |
143 | } | |
144 | ||
e41245cb | 145 | static int namedev_parse_rules(char *filename) |
19feb351 | 146 | { |
3e441450 | 147 | char line[LINE_SIZE]; |
148 | char *bufline; | |
19feb351 GKH |
149 | int lineno; |
150 | char *temp; | |
151 | char *temp2; | |
152 | char *temp3; | |
bb738647 | 153 | char *attr; |
c81b35c0 KS |
154 | char *buf; |
155 | size_t bufsize; | |
156 | size_t cur; | |
157 | size_t count; | |
ac28b86d | 158 | int program_given = 0; |
3e441450 | 159 | int valid; |
19feb351 GKH |
160 | int retval = 0; |
161 | struct config_device dev; | |
162 | ||
c81b35c0 | 163 | if (file_map(filename, &buf, &bufsize) == 0) { |
e41245cb | 164 | dbg("reading '%s' as rules file", filename); |
e8baccca | 165 | } else { |
c81b35c0 KS |
166 | dbg("can't open '%s' as rules file", filename); |
167 | return -1; | |
19feb351 GKH |
168 | } |
169 | ||
170 | /* loop through the whole file */ | |
c81b35c0 | 171 | cur = 0; |
19feb351 | 172 | lineno = 0; |
3e441450 | 173 | while (cur < bufsize) { |
c81b35c0 | 174 | count = buf_get_line(buf, bufsize, cur); |
3e441450 | 175 | bufline = &buf[cur]; |
c81b35c0 | 176 | cur += count+1; |
3e441450 | 177 | lineno++; |
19feb351 | 178 | |
3e441450 | 179 | if (count >= LINE_SIZE) { |
180 | info("line too long, rule skipped %s, line %d", | |
181 | filename, lineno); | |
182 | continue; | |
183 | } | |
093bf8f4 | 184 | |
3e441450 | 185 | /* eat the whitespace */ |
3db7fa27 | 186 | while ((count > 0) && isspace(bufline[0])) { |
3e441450 | 187 | bufline++; |
188 | count--; | |
189 | } | |
3db7fa27 KS |
190 | if (count == 0) |
191 | continue; | |
3e441450 | 192 | |
19feb351 | 193 | /* see if this is a comment */ |
3e441450 | 194 | if (bufline[0] == COMMENT_CHARACTER) |
19feb351 GKH |
195 | continue; |
196 | ||
3e441450 | 197 | strncpy(line, bufline, count); |
198 | line[count] = '\0'; | |
199 | dbg_parse("read '%s'", line); | |
19feb351 | 200 | |
d94df232 | 201 | /* get all known keys */ |
3e441450 | 202 | memset(&dev, 0x00, sizeof(struct config_device)); |
203 | temp = line; | |
204 | valid = 0; | |
205 | ||
d94df232 | 206 | while (1) { |
274812b5 | 207 | retval = parse_get_pair(&temp, &temp2, &temp3); |
19feb351 GKH |
208 | if (retval) |
209 | break; | |
3d150dfb | 210 | |
d94df232 KS |
211 | if (strcasecmp(temp2, FIELD_BUS) == 0) { |
212 | strfieldcpy(dev.bus, temp3); | |
3e441450 | 213 | valid = 1; |
d94df232 KS |
214 | continue; |
215 | } | |
216 | ||
217 | if (strcasecmp(temp2, FIELD_ID) == 0) { | |
218 | strfieldcpy(dev.id, temp3); | |
3e441450 | 219 | valid = 1; |
d94df232 KS |
220 | continue; |
221 | } | |
222 | ||
223 | if (strcasecmp(temp2, FIELD_PLACE) == 0) { | |
224 | strfieldcpy(dev.place, temp3); | |
3e441450 | 225 | valid = 1; |
d94df232 KS |
226 | continue; |
227 | } | |
228 | ||
229 | if (strncasecmp(temp2, FIELD_SYSFS, sizeof(FIELD_SYSFS)-1) == 0) { | |
a8b01705 GKH |
230 | struct sysfs_pair *pair = &dev.sysfs_pair[0]; |
231 | int sysfs_pair_num = 0; | |
232 | ||
233 | /* find first unused pair */ | |
234 | while (pair->file[0] != '\0') { | |
235 | ++sysfs_pair_num; | |
236 | if (sysfs_pair_num >= MAX_SYSFS_PAIRS) { | |
237 | pair = NULL; | |
238 | break; | |
239 | } | |
240 | ++pair; | |
241 | } | |
242 | if (pair) { | |
bb738647 KS |
243 | attr = get_key_attribute(temp2 + sizeof(FIELD_SYSFS)-1); |
244 | if (attr == NULL) { | |
245 | dbg("error parsing " FIELD_SYSFS " attribute"); | |
246 | continue; | |
247 | } | |
248 | strfieldcpy(pair->file, attr); | |
a8b01705 | 249 | strfieldcpy(pair->value, temp3); |
3e441450 | 250 | valid = 1; |
a8b01705 | 251 | } |
d94df232 KS |
252 | continue; |
253 | } | |
254 | ||
255 | if (strcasecmp(temp2, FIELD_KERNEL) == 0) { | |
ac28b86d | 256 | strfieldcpy(dev.kernel, temp3); |
3e441450 | 257 | valid = 1; |
d94df232 KS |
258 | continue; |
259 | } | |
260 | ||
261 | if (strcasecmp(temp2, FIELD_PROGRAM) == 0) { | |
ac28b86d KS |
262 | program_given = 1; |
263 | strfieldcpy(dev.program, temp3); | |
3e441450 | 264 | valid = 1; |
ac28b86d KS |
265 | continue; |
266 | } | |
267 | ||
268 | if (strcasecmp(temp2, FIELD_RESULT) == 0) { | |
269 | strfieldcpy(dev.result, temp3); | |
3e441450 | 270 | valid = 1; |
d94df232 KS |
271 | continue; |
272 | } | |
273 | ||
50e5de03 KS |
274 | if (strncasecmp(temp2, FIELD_NAME, sizeof(FIELD_NAME)-1) == 0) { |
275 | attr = get_key_attribute(temp2 + sizeof(FIELD_NAME)-1); | |
3e441450 | 276 | if (attr != NULL && strcasecmp(attr, ATTR_PARTITIONS) == 0) { |
50e5de03 KS |
277 | dbg_parse("creation of partition nodes requested"); |
278 | dev.partitions = PARTITIONS_COUNT; | |
279 | } | |
d94df232 | 280 | strfieldcpy(dev.name, temp3); |
3e441450 | 281 | valid = 1; |
d94df232 KS |
282 | continue; |
283 | } | |
284 | ||
285 | if (strcasecmp(temp2, FIELD_SYMLINK) == 0) { | |
3d150dfb | 286 | strfieldcpy(dev.symlink, temp3); |
3e441450 | 287 | valid = 1; |
d94df232 KS |
288 | continue; |
289 | } | |
3d150dfb | 290 | |
e41016d3 KS |
291 | if (strcasecmp(temp2, FIELD_OWNER) == 0) { |
292 | strfieldcpy(dev.owner, temp3); | |
3e441450 | 293 | valid = 1; |
e41016d3 KS |
294 | continue; |
295 | } | |
296 | ||
297 | if (strcasecmp(temp2, FIELD_GROUP) == 0) { | |
298 | strfieldcpy(dev.group, temp3); | |
3e441450 | 299 | valid = 1; |
e41016d3 KS |
300 | continue; |
301 | } | |
302 | ||
303 | if (strcasecmp(temp2, FIELD_MODE) == 0) { | |
304 | dev.mode = strtol(temp3, NULL, 8); | |
3e441450 | 305 | valid = 1; |
e41016d3 KS |
306 | continue; |
307 | } | |
308 | ||
851cd18d | 309 | dbg("unknown type of field '%s'", temp2); |
851cd18d | 310 | goto error; |
d94df232 KS |
311 | } |
312 | ||
3e441450 | 313 | /* skip line if not any valid key was found */ |
314 | if (!valid) | |
315 | goto error; | |
316 | ||
e41016d3 | 317 | /* simple plausibility checks for given keys */ |
ac28b86d KS |
318 | if ((dev.sysfs_pair[0].file[0] == '\0') ^ |
319 | (dev.sysfs_pair[0].value[0] == '\0')) { | |
3e441450 | 320 | info("inconsistency in " FIELD_SYSFS " key"); |
ac28b86d KS |
321 | goto error; |
322 | } | |
323 | ||
324 | if ((dev.result[0] != '\0') && (program_given == 0)) { | |
3e441450 | 325 | info(FIELD_RESULT " is only useful when " |
326 | FIELD_PROGRAM " is called in any rule before"); | |
d94df232 | 327 | goto error; |
19feb351 GKH |
328 | } |
329 | ||
54988802 | 330 | dev.config_line = lineno; |
bd5f8e7c | 331 | strfieldcpy(dev.config_file, filename); |
19feb351 GKH |
332 | retval = add_config_dev(&dev); |
333 | if (retval) { | |
334 | dbg("add_config_dev returned with error %d", retval); | |
d94df232 | 335 | continue; |
ac28b86d | 336 | error: |
3e441450 | 337 | info("parse error %s, line %d:%d, rule skipped", |
338 | filename, lineno, temp - line); | |
19feb351 GKH |
339 | } |
340 | } | |
c81b35c0 KS |
341 | |
342 | file_unmap(buf, bufsize); | |
19feb351 | 343 | return retval; |
d94df232 | 344 | } |
19feb351 | 345 | |
e41245cb | 346 | static int namedev_parse_permissions(char *filename) |
19feb351 | 347 | { |
3e441450 | 348 | char line[LINE_SIZE]; |
349 | char *bufline; | |
19feb351 GKH |
350 | char *temp; |
351 | char *temp2; | |
c81b35c0 KS |
352 | char *buf; |
353 | size_t bufsize; | |
354 | size_t cur; | |
355 | size_t count; | |
19feb351 | 356 | int retval = 0; |
61219c75 | 357 | struct perm_device dev; |
3e441450 | 358 | int lineno; |
19feb351 | 359 | |
c81b35c0 | 360 | if (file_map(filename, &buf, &bufsize) == 0) { |
e41245cb | 361 | dbg("reading '%s' as permissions file", filename); |
e8baccca | 362 | } else { |
e41245cb | 363 | dbg("can't open '%s' as permissions file", filename); |
c81b35c0 | 364 | return -1; |
19feb351 GKH |
365 | } |
366 | ||
367 | /* loop through the whole file */ | |
c81b35c0 | 368 | cur = 0; |
3e441450 | 369 | lineno = 0; |
370 | while (cur < bufsize) { | |
c81b35c0 | 371 | count = buf_get_line(buf, bufsize, cur); |
3e441450 | 372 | bufline = &buf[cur]; |
c81b35c0 | 373 | cur += count+1; |
3e441450 | 374 | lineno++; |
19feb351 | 375 | |
3e441450 | 376 | if (count >= LINE_SIZE) { |
377 | info("line too long, rule skipped %s, line %d", | |
378 | filename, lineno); | |
379 | continue; | |
380 | } | |
19feb351 | 381 | |
3e441450 | 382 | /* eat the whitespace */ |
3db7fa27 | 383 | while ((count > 0) && isspace(bufline[0])) { |
3e441450 | 384 | bufline++; |
385 | count--; | |
386 | } | |
3db7fa27 KS |
387 | if (count == 0) |
388 | continue; | |
3e441450 | 389 | |
19feb351 | 390 | /* see if this is a comment */ |
3e441450 | 391 | if (bufline[0] == COMMENT_CHARACTER) |
19feb351 GKH |
392 | continue; |
393 | ||
3e441450 | 394 | strncpy(line, bufline, count); |
395 | line[count] = '\0'; | |
396 | dbg_parse("read '%s'", line); | |
19feb351 GKH |
397 | |
398 | /* parse the line */ | |
3e441450 | 399 | memset(&dev, 0x00, sizeof(struct perm_device)); |
400 | temp = line; | |
401 | ||
19feb351 GKH |
402 | temp2 = strsep(&temp, ":"); |
403 | if (!temp2) { | |
404 | dbg("cannot parse line '%s'", line); | |
405 | continue; | |
406 | } | |
c472e3c8 | 407 | strfieldcpy(dev.name, temp2); |
19feb351 GKH |
408 | |
409 | temp2 = strsep(&temp, ":"); | |
410 | if (!temp2) { | |
411 | dbg("cannot parse line '%s'", line); | |
412 | continue; | |
413 | } | |
c472e3c8 | 414 | strfieldcpy(dev.owner, temp2); |
19feb351 GKH |
415 | |
416 | temp2 = strsep(&temp, ":"); | |
417 | if (!temp2) { | |
418 | dbg("cannot parse line '%s'", line); | |
419 | continue; | |
420 | } | |
c472e3c8 | 421 | strfieldcpy(dev.group, temp2); |
19feb351 GKH |
422 | |
423 | if (!temp) { | |
e41016d3 | 424 | dbg("cannot parse line '%s'", line); |
19feb351 GKH |
425 | continue; |
426 | } | |
427 | dev.mode = strtol(temp, NULL, 8); | |
428 | ||
429 | dbg_parse("name='%s', owner='%s', group='%s', mode=%#o", | |
e41016d3 KS |
430 | dev.name, dev.owner, dev.group, dev.mode); |
431 | ||
61219c75 | 432 | retval = add_perm_dev(&dev); |
19feb351 | 433 | if (retval) { |
3d150dfb | 434 | dbg("add_perm_dev returned with error %d", retval); |
19feb351 GKH |
435 | goto exit; |
436 | } | |
437 | } | |
438 | ||
439 | exit: | |
c81b35c0 | 440 | file_unmap(buf, bufsize); |
19feb351 | 441 | return retval; |
267f534d | 442 | } |
19feb351 | 443 | |
4a539daf | 444 | int namedev_init_rules() |
e41245cb | 445 | { |
e41245cb | 446 | struct stat stats; |
e41245cb | 447 | |
4a539daf | 448 | stat(udev_rules_filename, &stats); |
e41245cb | 449 | if ((stats.st_mode & S_IFMT) != S_IFDIR) |
4a539daf KS |
450 | return namedev_parse_rules(udev_rules_filename); |
451 | else | |
452 | return call_foreach_file(namedev_parse_rules, | |
453 | udev_rules_filename, RULEFILE_SUFFIX); | |
e41245cb KS |
454 | } |
455 | ||
456 | int namedev_init_permissions() | |
457 | { | |
4a539daf KS |
458 | struct stat stats; |
459 | ||
460 | stat(udev_permissions_filename, &stats); | |
461 | if ((stats.st_mode & S_IFMT) != S_IFDIR) | |
462 | return namedev_parse_permissions(udev_permissions_filename); | |
463 | else | |
464 | return call_foreach_file(namedev_parse_permissions, | |
465 | udev_permissions_filename, PERMFILE_SUFFIX); | |
e41245cb | 466 | } |