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"
38 #include "libsysfs/libsysfs.h"
40 /* global variables */
41 char sysfs_path[SYSFS_PATH_MAX];
42 char udev_config_dir[PATH_MAX];
43 char udev_root[PATH_MAX];
44 char udev_db_filename[PATH_MAX+NAME_MAX];
45 char udev_permission_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[NAME_MAX];
51 static void init_variables(void)
53 strfieldcpy(udev_root, UDEV_ROOT);
54 strfieldcpy(udev_config_dir, UDEV_CONFIG_DIR);
57 #define set_var(_name, _var) \
58 if (strcasecmp(variable, _name) == 0) { \
59 dbg_parse("%s = '%s'", _name, value); \
60 strncpy(_var, value, sizeof(_var)); \
63 static int parse_config_file(void)
73 fd = fopen(udev_config_filename, "r");
75 dbg("reading '%s' as config file", udev_config_filename);
77 dbg("can't open '%s' as config file", udev_config_filename);
81 /* loop through the whole file */
84 temp = fgets(line, sizeof(line), fd);
89 dbg_parse("read '%s'", temp);
91 /* eat the whitespace at the beginning of the line */
92 while (isspace(*temp))
99 /* see if this is a comment */
100 if (*temp == COMMENT_CHARACTER)
103 retval = get_pair(&temp, &variable, &value);
107 dbg_parse("variable = '%s', value = '%s'", variable, value);
109 set_var("udev_root", udev_root);
110 set_var("udev_db", udev_db_filename);
111 set_var("udev_rules", udev_rules_filename);
112 set_var("udev_permissions", udev_permission_filename);
113 set_var("default_mode", default_mode_str);
115 dbg_parse("%s:%d:%Zd: error parsing '%s'", udev_config_filename,
116 lineno, temp - line, temp);
122 static void get_dirs(void)
125 char *udev_db = UDEV_DB;
126 char *udev_config = UDEV_CONFIG_FILE;
127 char *udev_rules = UDEV_RULES_FILE;
128 char *udev_permission = UDEV_PERMISSION_FILE;
131 retval = sysfs_get_mnt_path(sysfs_path, SYSFS_PATH_MAX);
133 dbg("sysfs_get_mnt_path failed");
135 /* see if we should try to override any of the default values */
136 temp = getenv("UDEV_TEST");
138 /* hm testing is happening, use the specified values, if they are present */
139 temp = getenv("SYSFS_PATH");
141 strfieldcpy(sysfs_path, temp);
142 temp = getenv("UDEV_CONFIG_DIR");
144 strfieldcpy(udev_config_dir, temp);
145 temp = getenv("UDEV_ROOT");
147 strfieldcpy(udev_root, temp);
148 temp = getenv("UDEV_DB");
151 temp = getenv("UDEV_CONFIG_FILE");
154 temp = getenv("UDEV_RULES_FILE");
157 temp = getenv("UDEV_PERMISSION_FILE");
159 udev_permission = temp;
161 dbg("sysfs_path='%s'", sysfs_path);
163 strncpy(udev_db_filename, udev_root, sizeof(udev_db_filename));
164 strncat(udev_db_filename, udev_db, sizeof(udev_db_filename));
166 strncpy(udev_config_filename, udev_config_dir, sizeof(udev_config_filename));
167 strncat(udev_config_filename, udev_config, sizeof(udev_config_filename));
169 strncpy(udev_rules_filename, udev_config_dir, sizeof(udev_permission_filename));
170 strncat(udev_rules_filename, udev_rules, sizeof(udev_permission_filename));
172 strncpy(udev_permission_filename, udev_config_dir, sizeof(udev_permission_filename));
173 strncat(udev_permission_filename, udev_permission, sizeof(udev_permission_filename));
175 dbg_parse("udev_root = %s", udev_root);
176 dbg_parse("udev_config_filename = %s", udev_config_filename);
177 dbg_parse("udev_db_filename = %s", udev_db_filename);
178 dbg_parse("udev_rules_filename = %s", udev_rules_filename);
179 dbg_parse("udev_permission_filename = %s", udev_permission_filename);
182 dbg_parse("udev_root = %s", udev_root);
183 dbg_parse("udev_config_filename = %s", udev_config_filename);
184 dbg_parse("udev_db_filename = %s", udev_db_filename);
185 dbg_parse("udev_rules_filename = %s", udev_rules_filename);
186 dbg_parse("udev_permission_filename = %s", udev_permission_filename);
189 void udev_init_config(void)