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.
24 /* define this to enable parsing debugging */
25 /* #define DEBUG_PARSER */
35 #include "libsysfs/sysfs/libsysfs.h"
37 #include "udev_utils.h"
38 #include "udev_version.h"
42 /* global variables */
43 char sysfs_path[SYSFS_PATH_MAX];
44 char udev_root[PATH_MAX];
45 char udev_db_path[PATH_MAX+NAME_MAX];
46 char udev_permissions_filename[PATH_MAX+NAME_MAX];
47 char udev_rules_filename[PATH_MAX+NAME_MAX];
48 char udev_config_filename[PATH_MAX+NAME_MAX];
50 char default_owner[USER_SIZE];
51 char default_group[USER_SIZE];
57 static int string_is_true(const char *str)
59 if (strcasecmp(str, "true") == 0)
61 if (strcasecmp(str, "yes") == 0)
63 if (strcasecmp(str, "1") == 0)
68 static void init_variables(void)
72 /* If any config values are specified, they will override these values. */
73 strcpy(udev_root, UDEV_ROOT);
74 strcpy(udev_db_path, UDEV_DB);
75 strcpy(udev_config_filename, UDEV_CONFIG_FILE);
76 strcpy(udev_rules_filename, UDEV_RULES_FILE);
77 strcpy(udev_permissions_filename, UDEV_PERMISSION_FILE);
79 strcpy(default_owner, "root");
80 strcpy(default_group, "root");
83 udev_log = string_is_true(UDEV_LOG_DEFAULT);
86 env = getenv("UDEV_NO_DEVD");
87 if (env && string_is_true(env))
91 env = getenv("UDEV_NO_HOTPLUGD");
92 if (env && string_is_true(env))
96 int parse_get_pair(char **orig_string, char **left, char **right)
99 char *string = *orig_string;
104 /* eat any whitespace */
105 while (isspace(*string) || *string == ',')
108 /* split based on '=' */
109 temp = strsep(&string, "=");
114 /* take the right side and strip off the '"' */
115 while (isspace(*string))
122 temp = strsep(&string, "\"");
123 if (!string || *temp == '\0')
126 *orig_string = string;
131 static int parse_config_file(void)
133 char line[LINE_SIZE];
145 if (file_map(udev_config_filename, &buf, &bufsize) == 0) {
146 dbg("reading '%s' as config file", udev_config_filename);
148 dbg("can't open '%s' as config file", udev_config_filename);
152 /* loop through the whole file */
155 while (cur < bufsize) {
156 count = buf_get_line(buf, bufsize, cur);
161 if (count >= LINE_SIZE) {
162 info("line too long, conf line skipped %s, line %d",
163 udev_config_filename, lineno);
167 /* eat the whitespace */
168 while ((count > 0) && isspace(bufline[0])) {
175 /* see if this is a comment */
176 if (bufline[0] == COMMENT_CHARACTER)
179 strncpy(line, bufline, count);
182 dbg_parse("read '%s'", temp);
184 retval = parse_get_pair(&temp, &variable, &value);
186 info("%s:%d:%Zd: error parsing '%s'",
187 udev_config_filename, lineno, temp-line, temp);
189 dbg_parse("variable='%s', value='%s'", variable, value);
191 if (strcasecmp(variable, "udev_root") == 0) {
192 strfieldcpy(udev_root, value);
193 no_trailing_slash(udev_root);
197 if (strcasecmp(variable, "udev_db") == 0) {
198 strfieldcpy(udev_db_path, value);
199 no_trailing_slash(udev_db_path);
203 if (strcasecmp(variable, "udev_rules") == 0) {
204 strfieldcpy(udev_rules_filename, value);
205 no_trailing_slash(udev_rules_filename);
209 if (strcasecmp(variable, "udev_permissions") == 0) {
210 strfieldcpy(udev_permissions_filename, value);
211 no_trailing_slash(udev_permissions_filename);
215 if (strcasecmp(variable, "default_mode") == 0) {
216 default_mode = strtol(value, NULL, 8);
220 if (strcasecmp(variable, "default_owner") == 0) {
221 strfieldcpy(default_owner, value);
225 if (strcasecmp(variable, "default_group") == 0) {
226 strfieldcpy(default_group, value);
230 if (strcasecmp(variable, "udev_log") == 0) {
231 udev_log = string_is_true(value);
235 info("%s:%d:%Zd: unknown key '%s'",
236 udev_config_filename, lineno, temp-line, temp);
239 file_unmap(buf, bufsize);
243 static void get_dirs(void)
248 retval = sysfs_get_mnt_path(sysfs_path, SYSFS_PATH_MAX);
250 dbg("sysfs_get_mnt_path failed");
252 /* see if we should try to override any of the default values */
253 if (getenv("UDEV_TEST") != NULL) {
254 temp = getenv("SYSFS_PATH");
256 strfieldcpy(sysfs_path, temp);
257 no_trailing_slash(sysfs_path);
260 temp = getenv("UDEV_CONFIG_FILE");
262 strfieldcpy(udev_config_filename, temp);
265 dbg("sysfs_path='%s'", sysfs_path);
266 dbg_parse("udev_root = %s", udev_root);
267 dbg_parse("udev_config_filename = %s", udev_config_filename);
268 dbg_parse("udev_db_path = %s", udev_db_path);
269 dbg_parse("udev_rules_filename = %s", udev_rules_filename);
270 dbg_parse("udev_permissions_filename = %s", udev_permissions_filename);
271 dbg_parse("udev_log = %d", udev_log);
275 dbg("udev_root = %s", udev_root);
276 dbg("udev_config_filename = %s", udev_config_filename);
277 dbg("udev_db_path = %s", udev_db_path);
278 dbg("udev_rules_filename = %s", udev_rules_filename);
279 dbg("udev_permissions_filename = %s", udev_permissions_filename);
280 dbg("udev_log = %d", udev_log);
283 void udev_init_config(void)