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_rules_filename[PATH_MAX+NAME_MAX];
47 char udev_config_filename[PATH_MAX+NAME_MAX];
49 char default_owner[USER_SIZE];
50 char default_group[USER_SIZE];
56 static int string_is_true(const 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 /* If any config values are specified, they will override these values. */
72 strcpy(udev_root, UDEV_ROOT);
73 strcpy(udev_db_path, UDEV_DB);
74 strcpy(udev_config_filename, UDEV_CONFIG_FILE);
75 strcpy(udev_rules_filename, UDEV_RULES_FILE);
77 strcpy(default_owner, "root");
78 strcpy(default_group, "root");
81 udev_log = string_is_true(UDEV_LOG_DEFAULT);
84 env = getenv("UDEV_NO_DEVD");
85 if (env && string_is_true(env))
89 env = getenv("UDEV_NO_HOTPLUGD");
90 if (env && string_is_true(env))
94 int parse_get_pair(char **orig_string, char **left, char **right)
97 char *string = *orig_string;
102 /* eat any whitespace */
103 while (isspace(*string) || *string == ',')
106 /* split based on '=' */
107 temp = strsep(&string, "=");
112 /* take the right side and strip off the '"' */
113 while (isspace(*string))
120 temp = strsep(&string, "\"");
121 if (!string || *temp == '\0')
124 *orig_string = string;
129 static int parse_config_file(void)
131 char line[LINE_SIZE];
143 if (file_map(udev_config_filename, &buf, &bufsize) == 0) {
144 dbg("reading '%s' as config file", udev_config_filename);
146 dbg("can't open '%s' as config file", udev_config_filename);
150 /* loop through the whole file */
153 while (cur < bufsize) {
154 count = buf_get_line(buf, bufsize, cur);
159 if (count >= LINE_SIZE) {
160 info("line too long, conf line skipped %s, line %d",
161 udev_config_filename, lineno);
165 /* eat the whitespace */
166 while ((count > 0) && isspace(bufline[0])) {
173 /* see if this is a comment */
174 if (bufline[0] == COMMENT_CHARACTER)
177 strncpy(line, bufline, count);
180 dbg_parse("read '%s'", temp);
182 retval = parse_get_pair(&temp, &variable, &value);
184 info("%s:%d:%Zd: error parsing '%s'",
185 udev_config_filename, lineno, temp-line, temp);
187 dbg_parse("variable='%s', value='%s'", variable, value);
189 if (strcasecmp(variable, "udev_root") == 0) {
190 strfieldcpy(udev_root, value);
191 no_trailing_slash(udev_root);
195 if (strcasecmp(variable, "udev_db") == 0) {
196 strfieldcpy(udev_db_path, value);
197 no_trailing_slash(udev_db_path);
201 if (strcasecmp(variable, "udev_rules") == 0) {
202 strfieldcpy(udev_rules_filename, value);
203 no_trailing_slash(udev_rules_filename);
207 if (strcasecmp(variable, "default_mode") == 0) {
208 default_mode = strtol(value, NULL, 8);
212 if (strcasecmp(variable, "default_owner") == 0) {
213 strfieldcpy(default_owner, value);
217 if (strcasecmp(variable, "default_group") == 0) {
218 strfieldcpy(default_group, value);
222 if (strcasecmp(variable, "udev_log") == 0) {
223 udev_log = string_is_true(value);
227 info("%s:%d:%Zd: unknown key '%s'",
228 udev_config_filename, lineno, temp-line, temp);
231 file_unmap(buf, bufsize);
235 static void get_dirs(void)
240 retval = sysfs_get_mnt_path(sysfs_path, SYSFS_PATH_MAX);
242 dbg("sysfs_get_mnt_path failed");
244 /* see if we should try to override any of the default values */
245 if (getenv("UDEV_TEST") != NULL) {
246 temp = getenv("SYSFS_PATH");
248 strfieldcpy(sysfs_path, temp);
249 no_trailing_slash(sysfs_path);
252 temp = getenv("UDEV_CONFIG_FILE");
254 strfieldcpy(udev_config_filename, temp);
257 dbg("sysfs_path='%s'", sysfs_path);
258 dbg_parse("udev_root = %s", udev_root);
259 dbg_parse("udev_config_filename = %s", udev_config_filename);
260 dbg_parse("udev_db_path = %s", udev_db_path);
261 dbg_parse("udev_rules_filename = %s", udev_rules_filename);
262 dbg_parse("udev_log = %d", udev_log);
266 dbg("udev_root = %s", udev_root);
267 dbg("udev_config_filename = %s", udev_config_filename);
268 dbg("udev_db_path = %s", udev_db_path);
269 dbg("udev_rules_filename = %s", udev_rules_filename);
270 dbg("udev_log = %d", udev_log);
273 void udev_init_config(void)