6 * Copyright (C) 2003 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 static int parse_config_file(void)
81 fd = fopen(udev_config_filename, "r");
83 dbg("reading '%s' as config file", udev_config_filename);
85 dbg("can't open '%s' as config file", udev_config_filename);
89 /* loop through the whole file */
92 temp = fgets(line, sizeof(line), fd);
97 dbg_parse("read '%s'", temp);
99 /* eat the whitespace at the beginning of the line */
100 while (isspace(*temp))
107 /* see if this is a comment */
108 if (*temp == COMMENT_CHARACTER)
111 retval = get_pair(&temp, &variable, &value);
115 dbg_parse("variable = '%s', value = '%s'", variable, value);
117 set_var("udev_root", udev_root);
118 set_var("udev_db", udev_db_filename);
119 set_var("udev_rules", udev_rules_filename);
120 set_var("udev_permissions", udev_permissions_filename);
121 set_var("default_mode", default_mode_str);
122 set_var("default_owner", default_owner_str);
123 set_var("default_group", default_group_str);
125 dbg_parse("%s:%d:%Zd: error parsing '%s'", udev_config_filename,
126 lineno, temp - line, temp);
132 static void get_dirs(void)
137 retval = sysfs_get_mnt_path(sysfs_path, SYSFS_PATH_MAX);
139 dbg("sysfs_get_mnt_path failed");
141 /* see if we should try to override any of the default values */
142 temp = getenv("UDEV_TEST");
144 /* hm testing is happening, use the specified values, if they are present */
145 temp = getenv("SYSFS_PATH");
147 strfieldcpy(sysfs_path, temp);
148 temp = getenv("UDEV_CONFIG_FILE");
150 strfieldcpy(udev_config_filename, temp);
152 dbg("sysfs_path='%s'", sysfs_path);
154 dbg_parse("udev_root = %s", udev_root);
155 dbg_parse("udev_config_filename = %s", udev_config_filename);
156 dbg_parse("udev_db_filename = %s", udev_db_filename);
157 dbg_parse("udev_rules_filename = %s", udev_rules_filename);
158 dbg_parse("udev_permissions_filename = %s", udev_permissions_filename);
161 dbg_parse("udev_root = %s", udev_root);
162 dbg_parse("udev_config_filename = %s", udev_config_filename);
163 dbg_parse("udev_db_filename = %s", udev_db_filename);
164 dbg_parse("udev_rules_filename = %s", udev_rules_filename);
165 dbg_parse("udev_permissions_filename = %s", udev_permissions_filename);
168 void udev_init_config(void)