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.
32 #include "libsysfs/sysfs/libsysfs.h"
33 #include "udev_libc_wrapper.h"
35 #include "udev_utils.h"
36 #include "udev_version.h"
38 #include "udev_rules.h"
40 /* global variables */
41 char sysfs_path[PATH_SIZE];
42 char udev_root[PATH_SIZE];
43 char udev_db_path[PATH_SIZE];
44 char udev_rules_filename[PATH_SIZE];
45 char udev_config_filename[PATH_SIZE];
51 static int string_is_true(const char *str)
53 if (strcasecmp(str, "true") == 0)
55 if (strcasecmp(str, "yes") == 0)
57 if (strcasecmp(str, "1") == 0)
62 static int get_key(char **line, char **key, char **value)
72 while (isspace(linepos[0]))
79 if (linepos[0] == '\0')
81 if (isspace(linepos[0]))
83 if (linepos[0] == '=')
92 while (isspace(linepos[0]))
96 if (linepos[0] == '"')
102 temp = strchr(linepos, '"');
110 static void init_variables(void)
114 /* If any config values are specified, they will override these values. */
115 strcpy(udev_root, UDEV_ROOT);
116 strcpy(udev_db_path, UDEV_DB);
117 strcpy(udev_config_filename, UDEV_CONFIG_FILE);
118 strcpy(udev_rules_filename, UDEV_RULES_FILE);
120 udev_log = string_is_true(UDEV_LOG_DEFAULT);
123 env = getenv("UDEV_NO_DEVD");
124 if (env && string_is_true(env))
128 env = getenv("UDEV_NO_HOTPLUGD");
129 if (env && string_is_true(env))
133 static int parse_config_file(void)
135 char line[LINE_SIZE];
147 if (file_map(udev_config_filename, &buf, &bufsize) != 0) {
148 dbg("can't open '%s' as config file", udev_config_filename);
151 dbg("reading '%s' as config file", udev_config_filename);
153 /* loop through the whole file */
156 while (cur < bufsize) {
157 count = buf_get_line(buf, bufsize, cur);
162 if (count >= sizeof(line)) {
163 info("line too long, conf line skipped %s, line %d",
164 udev_config_filename, lineno);
168 /* eat the whitespace */
169 while ((count > 0) && isspace(bufline[0])) {
176 /* see if this is a comment */
177 if (bufline[0] == COMMENT_CHARACTER)
180 strlcpy(line, bufline, count);
181 dbg("read '%s'", line);
184 retval = get_key(&linepos, &variable, &value);
186 info("error parsing %s, line %d:%d", udev_config_filename, lineno, (int) (linepos-line));
190 dbg("variable='%s', value='%s'", variable, value);
192 if (strcasecmp(variable, "udev_root") == 0) {
193 strlcpy(udev_root, value, sizeof(udev_root));
194 no_trailing_slash(udev_root);
198 if (strcasecmp(variable, "udev_db") == 0) {
199 strlcpy(udev_db_path, value, sizeof(udev_db_path));
200 no_trailing_slash(udev_db_path);
204 if (strcasecmp(variable, "udev_rules") == 0) {
205 strlcpy(udev_rules_filename, value, sizeof(udev_rules_filename));
206 no_trailing_slash(udev_rules_filename);
210 if (strcasecmp(variable, "udev_log") == 0) {
211 udev_log = string_is_true(value);
216 file_unmap(buf, bufsize);
220 void udev_init_config(void)
224 sysfs_get_mnt_path(sysfs_path, sizeof(sysfs_path));
226 /* see if we should try to override any of the default values */
227 if (getenv("UDEV_TEST") != NULL) {
230 temp = getenv("SYSFS_PATH");
232 strlcpy(sysfs_path, temp, sizeof(sysfs_path));
233 no_trailing_slash(sysfs_path);
236 temp = getenv("UDEV_CONFIG_FILE");
238 strlcpy(udev_config_filename, temp, sizeof(udev_config_filename));
242 dbg("sysfs_path='%s'", sysfs_path);
243 dbg("udev_root='%s'", udev_root);
244 dbg("udev_config_filename='%s'", udev_config_filename);
245 dbg("udev_db_path='%s'", udev_db_path);
246 dbg("udev_rules_filename='%s'", udev_rules_filename);
247 dbg("udev_log=%d", udev_log);