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"
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_filename[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];
49 char default_mode_str[MODE_SIZE];
50 char default_owner_str[OWNER_SIZE];
51 char default_group_str[GROUP_SIZE];
56 static int string_is_true(char *str)
58 if (strcasecmp(str, "true") == 0)
60 if (strcasecmp(str, "yes") == 0)
62 if (strcasecmp(str, "1") == 0)
67 static void init_variables(void)
71 /* fill up the defaults.
72 * If any config values are specified, they will
73 * override these values. */
74 strfieldcpy(udev_root, UDEV_ROOT);
75 strfieldcpy(udev_db_filename, UDEV_DB);
76 strfieldcpy(udev_config_filename, UDEV_CONFIG_FILE);
77 strfieldcpy(udev_rules_filename, UDEV_RULES_FILE);
78 strfieldcpy(udev_permissions_filename, UDEV_PERMISSION_FILE);
79 udev_log = string_is_true(UDEV_LOG_DEFAULT);
82 env = getenv("UDEV_NO_DEVD");
83 if (env && string_is_true(env))
87 int parse_get_pair(char **orig_string, char **left, char **right)
90 char *string = *orig_string;
95 /* eat any whitespace */
96 while (isspace(*string) || *string == ',')
99 /* split based on '=' */
100 temp = strsep(&string, "=");
105 /* take the right side and strip off the '"' */
106 while (isspace(*string))
113 temp = strsep(&string, "\"");
114 if (!string || *temp == '\0')
117 *orig_string = string;
122 static int parse_config_file(void)
124 char line[LINE_SIZE];
136 if (file_map(udev_config_filename, &buf, &bufsize) == 0) {
137 dbg("reading '%s' as config file", udev_config_filename);
139 dbg("can't open '%s' as config file", udev_config_filename);
143 /* loop through the whole file */
146 while (cur < bufsize) {
147 count = buf_get_line(buf, bufsize, cur);
152 if (count >= LINE_SIZE) {
153 info("line too long, conf line skipped %s, line %d",
154 udev_config_filename, lineno);
158 /* eat the whitespace */
159 while ((count > 0) && isspace(bufline[0])) {
166 /* see if this is a comment */
167 if (bufline[0] == COMMENT_CHARACTER)
170 strncpy(line, bufline, count);
173 dbg_parse("read '%s'", temp);
175 retval = parse_get_pair(&temp, &variable, &value);
177 info("%s:%d:%Zd: error parsing '%s'",
178 udev_config_filename, lineno, temp-line, temp);
180 dbg_parse("variable='%s', value='%s'", variable, value);
182 if (strcasecmp(variable, "udev_root") == 0) {
183 strfieldcpy(udev_root, value);
184 leading_slash(udev_root);
188 if (strcasecmp(variable, "udev_db") == 0) {
189 strfieldcpy(udev_db_filename, value);
193 if (strcasecmp(variable, "udev_rules") == 0) {
194 strfieldcpy(udev_rules_filename, value);
195 no_leading_slash(udev_rules_filename);
199 if (strcasecmp(variable, "udev_permissions") == 0) {
200 strfieldcpy(udev_permissions_filename, value);
201 no_leading_slash(udev_permissions_filename);
205 if (strcasecmp(variable, "default_mode") == 0) {
206 strfieldcpy(default_mode_str, value);
210 if (strcasecmp(variable, "default_owner") == 0) {
211 strfieldcpy(default_owner_str, value);
215 if (strcasecmp(variable, "default_group") == 0) {
216 strfieldcpy(default_group_str, value);
220 if (strcasecmp(variable, "udev_log") == 0) {
221 udev_log = string_is_true(value);
225 info("%s:%d:%Zd: unknown key '%s'",
226 udev_config_filename, lineno, temp-line, temp);
229 file_unmap(buf, bufsize);
233 static void get_dirs(void)
238 retval = sysfs_get_mnt_path(sysfs_path, SYSFS_PATH_MAX);
240 dbg("sysfs_get_mnt_path failed");
242 /* see if we should try to override any of the default values */
243 if (getenv("UDEV_TEST") != NULL) {
244 temp = getenv("SYSFS_PATH");
246 strfieldcpy(sysfs_path, temp);
247 no_leading_slash(sysfs_path);
250 temp = getenv("UDEV_CONFIG_FILE");
252 strfieldcpy(udev_config_filename, temp);
255 dbg("sysfs_path='%s'", sysfs_path);
256 dbg_parse("udev_root = %s", udev_root);
257 dbg_parse("udev_config_filename = %s", udev_config_filename);
258 dbg_parse("udev_db_filename = %s", udev_db_filename);
259 dbg_parse("udev_rules_filename = %s", udev_rules_filename);
260 dbg_parse("udev_permissions_filename = %s", udev_permissions_filename);
261 dbg_parse("udev_log = %d", udev_log);
265 dbg("udev_root = %s", udev_root);
266 dbg("udev_config_filename = %s", udev_config_filename);
267 dbg("udev_db_filename = %s", udev_db_filename);
268 dbg("udev_rules_filename = %s", udev_rules_filename);
269 dbg("udev_permissions_filename = %s", udev_permissions_filename);
270 dbg("udev_log_str = %d", udev_log);
273 void udev_init_config(void)