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];
53 static int string_is_true(const char *str)
55 if (strcasecmp(str, "true") == 0)
57 if (strcasecmp(str, "yes") == 0)
59 if (strcasecmp(str, "1") == 0)
64 static void init_variables(void)
68 /* If any config values are specified, they will override these values. */
69 strcpy(udev_root, UDEV_ROOT);
70 strcpy(udev_db_path, UDEV_DB);
71 strcpy(udev_config_filename, UDEV_CONFIG_FILE);
72 strcpy(udev_rules_filename, UDEV_RULES_FILE);
74 udev_log = string_is_true(UDEV_LOG_DEFAULT);
77 env = getenv("UDEV_NO_DEVD");
78 if (env && string_is_true(env))
82 env = getenv("UDEV_NO_HOTPLUGD");
83 if (env && string_is_true(env))
87 static int parse_config_file(void)
101 if (file_map(udev_config_filename, &buf, &bufsize) == 0) {
102 dbg("reading '%s' as config file", udev_config_filename);
104 dbg("can't open '%s' as config file", udev_config_filename);
108 /* loop through the whole file */
111 while (cur < bufsize) {
112 count = buf_get_line(buf, bufsize, cur);
117 if (count >= LINE_SIZE) {
118 info("line too long, conf line skipped %s, line %d",
119 udev_config_filename, lineno);
123 /* eat the whitespace */
124 while ((count > 0) && isspace(bufline[0])) {
131 /* see if this is a comment */
132 if (bufline[0] == COMMENT_CHARACTER)
135 strncpy(line, bufline, count);
138 dbg_parse("read '%s'", temp);
140 retval = parse_get_pair(&temp, &variable, &value);
142 info("%s:%d:%Zd: error parsing '%s'",
143 udev_config_filename, lineno, temp-line, temp);
145 dbg_parse("variable='%s', value='%s'", variable, value);
147 if (strcasecmp(variable, "udev_root") == 0) {
148 strfieldcpy(udev_root, value);
149 no_trailing_slash(udev_root);
153 if (strcasecmp(variable, "udev_db") == 0) {
154 strfieldcpy(udev_db_path, value);
155 no_trailing_slash(udev_db_path);
159 if (strcasecmp(variable, "udev_rules") == 0) {
160 strfieldcpy(udev_rules_filename, value);
161 no_trailing_slash(udev_rules_filename);
165 if (strcasecmp(variable, "udev_log") == 0) {
166 udev_log = string_is_true(value);
171 file_unmap(buf, bufsize);
175 static void get_dirs(void)
180 retval = sysfs_get_mnt_path(sysfs_path, SYSFS_PATH_MAX);
182 dbg("sysfs_get_mnt_path failed");
184 /* see if we should try to override any of the default values */
185 if (getenv("UDEV_TEST") != NULL) {
186 temp = getenv("SYSFS_PATH");
188 strfieldcpy(sysfs_path, temp);
189 no_trailing_slash(sysfs_path);
192 temp = getenv("UDEV_CONFIG_FILE");
194 strfieldcpy(udev_config_filename, temp);
198 dbg("sysfs_path='%s'", sysfs_path);
199 dbg("udev_root='%s'", udev_root);
200 dbg("udev_config_filename='%s'", udev_config_filename);
201 dbg("udev_db_path='%s'", udev_db_path);
202 dbg("udev_rules_filename='%s'", udev_rules_filename);
203 dbg("udev_log=%d", udev_log);
206 void udev_init_config(void)