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_version.h"
41 /* global variables */
42 char sysfs_path[SYSFS_PATH_MAX];
43 char udev_root[PATH_MAX];
44 char udev_db_filename[PATH_MAX+NAME_MAX];
45 char udev_permissions_filename[PATH_MAX+NAME_MAX];
46 char udev_rules_filename[PATH_MAX+NAME_MAX];
47 char udev_config_filename[PATH_MAX+NAME_MAX];
48 char default_mode_str[MODE_SIZE];
49 char default_owner_str[OWNER_SIZE];
50 char default_group_str[GROUP_SIZE];
55 static int string_is_true(char *str)
57 if (strcasecmp(str, "true") == 0)
59 if (strcasecmp(str, "yes") == 0)
64 static void init_variables(void)
66 /* fill up the defaults.
67 * If any config values are specified, they will
68 * override these values. */
69 strfieldcpy(udev_root, UDEV_ROOT);
70 strfieldcpy(udev_db_filename, UDEV_DB);
71 strfieldcpy(udev_config_filename, UDEV_CONFIG_FILE);
72 strfieldcpy(udev_rules_filename, UDEV_RULES_FILE);
73 strfieldcpy(udev_permissions_filename, UDEV_PERMISSION_FILE);
74 udev_log = string_is_true(UDEV_LOG_DEFAULT);
77 if (getenv("UDEV_NO_SLEEP") != NULL)
81 #define set_var(_name, _var) \
82 if (strcasecmp(variable, _name) == 0) { \
83 dbg_parse("%s = '%s'", _name, value); \
84 strfieldcpymax(_var, value, sizeof(_var));\
87 #define set_bool(_name, _var) \
88 if (strcasecmp(variable, _name) == 0) { \
89 dbg_parse("%s = '%s'", _name, value); \
90 _var = string_is_true(value); \
93 int parse_get_pair(char **orig_string, char **left, char **right)
96 char *string = *orig_string;
101 /* eat any whitespace */
102 while (isspace(*string) || *string == ',')
105 /* split based on '=' */
106 temp = strsep(&string, "=");
111 /* take the right side and strip off the '"' */
112 while (isspace(*string))
119 temp = strsep(&string, "\"");
120 if (!string || *temp == '\0')
123 *orig_string = string;
128 static int parse_config_file(void)
138 fd = fopen(udev_config_filename, "r");
140 dbg("reading '%s' as config file", udev_config_filename);
142 dbg("can't open '%s' as config file", udev_config_filename);
146 /* loop through the whole file */
149 temp = fgets(line, sizeof(line), fd);
154 dbg_parse("read '%s'", temp);
156 /* eat the whitespace at the beginning of the line */
157 while (isspace(*temp))
164 /* see if this is a comment */
165 if (*temp == COMMENT_CHARACTER)
168 retval = parse_get_pair(&temp, &variable, &value);
172 dbg_parse("variable = '%s', value = '%s'", variable, value);
174 set_var("udev_root", udev_root);
175 set_var("udev_db", udev_db_filename);
176 set_var("udev_rules", udev_rules_filename);
177 set_var("udev_permissions", udev_permissions_filename);
178 set_var("default_mode", default_mode_str);
179 set_var("default_owner", default_owner_str);
180 set_var("default_group", default_group_str);
181 set_bool("udev_log", udev_log);
183 dbg_parse("%s:%d:%Zd: error parsing '%s'", udev_config_filename,
184 lineno, temp - line, temp);
190 static void get_dirs(void)
195 retval = sysfs_get_mnt_path(sysfs_path, SYSFS_PATH_MAX);
197 dbg("sysfs_get_mnt_path failed");
199 /* see if we should try to override any of the default values */
200 temp = getenv("UDEV_TEST");
202 /* hm testing is happening, use the specified values, if they are present */
203 temp = getenv("SYSFS_PATH");
205 strfieldcpy(sysfs_path, temp);
206 temp = getenv("UDEV_CONFIG_FILE");
208 strfieldcpy(udev_config_filename, temp);
210 dbg("sysfs_path='%s'", sysfs_path);
212 dbg_parse("udev_root = %s", udev_root);
213 dbg_parse("udev_config_filename = %s", udev_config_filename);
214 dbg_parse("udev_db_filename = %s", udev_db_filename);
215 dbg_parse("udev_rules_filename = %s", udev_rules_filename);
216 dbg_parse("udev_permissions_filename = %s", udev_permissions_filename);
217 dbg_parse("udev_log = %d", udev_log);
220 dbg_parse("udev_root = %s", udev_root);
221 dbg_parse("udev_config_filename = %s", udev_config_filename);
222 dbg_parse("udev_db_filename = %s", udev_db_filename);
223 dbg_parse("udev_rules_filename = %s", udev_rules_filename);
224 dbg_parse("udev_permissions_filename = %s", udev_permissions_filename);
225 dbg_parse("udev_log_str = %d", udev_log);
228 void udev_init_config(void)