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 */
36 #include "udev_version.h"
39 #include "libsysfs/libsysfs.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];
53 static void init_variables(void)
55 /* fill up the defaults.
56 * If any config values are specified, they will
57 * override these values. */
58 strfieldcpy(udev_root, UDEV_ROOT);
59 strfieldcpy(udev_db_filename, UDEV_DB);
60 strfieldcpy(udev_config_filename, UDEV_CONFIG_FILE);
61 strfieldcpy(udev_rules_filename, UDEV_RULES_FILE);
62 strfieldcpy(udev_permissions_filename, UDEV_PERMISSION_FILE);
65 #define set_var(_name, _var) \
66 if (strcasecmp(variable, _name) == 0) { \
67 dbg_parse("%s = '%s'", _name, value); \
68 strncpy(_var, value, sizeof(_var)); \
71 int parse_get_pair(char **orig_string, char **left, char **right)
74 char *string = *orig_string;
79 /* eat any whitespace */
80 while (isspace(*string) || *string == ',')
83 /* split based on '=' */
84 temp = strsep(&string, "=");
89 /* take the right side and strip off the '"' */
90 while (isspace(*string))
97 temp = strsep(&string, "\"");
98 if (!string || *temp == '\0')
101 *orig_string = string;
106 static int parse_config_file(void)
116 fd = fopen(udev_config_filename, "r");
118 dbg("reading '%s' as config file", udev_config_filename);
120 dbg("can't open '%s' as config file", udev_config_filename);
124 /* loop through the whole file */
127 temp = fgets(line, sizeof(line), fd);
132 dbg_parse("read '%s'", temp);
134 /* eat the whitespace at the beginning of the line */
135 while (isspace(*temp))
142 /* see if this is a comment */
143 if (*temp == COMMENT_CHARACTER)
146 retval = parse_get_pair(&temp, &variable, &value);
150 dbg_parse("variable = '%s', value = '%s'", variable, value);
152 set_var("udev_root", udev_root);
153 set_var("udev_db", udev_db_filename);
154 set_var("udev_rules", udev_rules_filename);
155 set_var("udev_permissions", udev_permissions_filename);
156 set_var("default_mode", default_mode_str);
157 set_var("default_owner", default_owner_str);
158 set_var("default_group", default_group_str);
160 dbg_parse("%s:%d:%Zd: error parsing '%s'", udev_config_filename,
161 lineno, temp - line, temp);
167 static void get_dirs(void)
172 retval = sysfs_get_mnt_path(sysfs_path, SYSFS_PATH_MAX);
174 dbg("sysfs_get_mnt_path failed");
176 /* see if we should try to override any of the default values */
177 temp = getenv("UDEV_TEST");
179 /* hm testing is happening, use the specified values, if they are present */
180 temp = getenv("SYSFS_PATH");
182 strfieldcpy(sysfs_path, temp);
183 temp = getenv("UDEV_CONFIG_FILE");
185 strfieldcpy(udev_config_filename, temp);
187 dbg("sysfs_path='%s'", sysfs_path);
189 dbg_parse("udev_root = %s", udev_root);
190 dbg_parse("udev_config_filename = %s", udev_config_filename);
191 dbg_parse("udev_db_filename = %s", udev_db_filename);
192 dbg_parse("udev_rules_filename = %s", udev_rules_filename);
193 dbg_parse("udev_permissions_filename = %s", udev_permissions_filename);
196 dbg_parse("udev_root = %s", udev_root);
197 dbg_parse("udev_config_filename = %s", udev_config_filename);
198 dbg_parse("udev_db_filename = %s", udev_db_filename);
199 dbg_parse("udev_rules_filename = %s", udev_rules_filename);
200 dbg_parse("udev_permissions_filename = %s", udev_permissions_filename);
203 void udev_init_config(void)