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"
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_filename[PATH_MAX+NAME_MAX];
46 char udev_permissions_filename[PATH_MAX+NAME_MAX];
47 char udev_rules_filename[PATH_MAX+NAME_MAX];
48 char udev_config_filename[PATH_MAX+NAME_MAX];
49 char default_mode_str[MODE_SIZE];
50 char default_owner_str[OWNER_SIZE];
51 char default_group_str[GROUP_SIZE];
57 static int string_is_true(char *str)
59 if (strcasecmp(str, "true") == 0)
61 if (strcasecmp(str, "yes") == 0)
66 static void init_variables(void)
68 /* fill up the defaults.
69 * If any config values are specified, they will
70 * override these values. */
71 strfieldcpy(udev_root, UDEV_ROOT);
72 strfieldcpy(udev_db_filename, UDEV_DB);
73 strfieldcpy(udev_config_filename, UDEV_CONFIG_FILE);
74 strfieldcpy(udev_rules_filename, UDEV_RULES_FILE);
75 strfieldcpy(udev_permissions_filename, UDEV_PERMISSION_FILE);
76 udev_log = string_is_true(UDEV_LOG_DEFAULT);
79 if (getenv("UDEV_NO_SLEEP") != NULL)
83 if (getenv("UDEV_NO_DEVD") != NULL)
87 #define set_var(_name, _var) \
88 if (strcasecmp(variable, _name) == 0) { \
89 dbg_parse("%s='%s'", _name, value); \
90 strfieldcpy(_var, value);\
93 #define set_bool(_name, _var) \
94 if (strcasecmp(variable, _name) == 0) { \
95 dbg_parse("%s='%s'", _name, value); \
96 _var = string_is_true(value); \
99 int parse_get_pair(char **orig_string, char **left, char **right)
102 char *string = *orig_string;
107 /* eat any whitespace */
108 while (isspace(*string) || *string == ',')
111 /* split based on '=' */
112 temp = strsep(&string, "=");
117 /* take the right side and strip off the '"' */
118 while (isspace(*string))
125 temp = strsep(&string, "\"");
126 if (!string || *temp == '\0')
129 *orig_string = string;
134 static int parse_config_file(void)
147 if (file_map(udev_config_filename, &buf, &bufsize) == 0) {
148 dbg("reading '%s' as config file", udev_config_filename);
150 dbg("can't open '%s' as config file", udev_config_filename);
154 /* loop through the whole file */
158 count = buf_get_line(buf, bufsize, cur);
160 strncpy(line, buf + cur, count);
169 dbg_parse("read '%s'", temp);
171 /* eat the whitespace at the beginning of the line */
172 while (isspace(*temp))
179 /* see if this is a comment */
180 if (*temp == COMMENT_CHARACTER)
183 retval = parse_get_pair(&temp, &variable, &value);
187 dbg_parse("variable = '%s', value = '%s'", variable, value);
189 set_var("udev_root", udev_root);
190 set_var("udev_db", udev_db_filename);
191 set_var("udev_rules", udev_rules_filename);
192 set_var("udev_permissions", udev_permissions_filename);
193 set_var("default_mode", default_mode_str);
194 set_var("default_owner", default_owner_str);
195 set_var("default_group", default_group_str);
196 set_bool("udev_log", udev_log);
198 dbg_parse("%s:%d:%Zd: error parsing '%s'", udev_config_filename,
199 lineno, temp - line, temp);
201 file_unmap(buf, bufsize);
205 static void get_dirs(void)
210 retval = sysfs_get_mnt_path(sysfs_path, SYSFS_PATH_MAX);
212 dbg("sysfs_get_mnt_path failed");
214 /* see if we should try to override any of the default values */
215 temp = getenv("UDEV_TEST");
217 /* hm testing is happening, use the specified values, if they are present */
218 temp = getenv("SYSFS_PATH");
220 strfieldcpy(sysfs_path, temp);
221 temp = getenv("UDEV_CONFIG_FILE");
223 strfieldcpy(udev_config_filename, temp);
225 dbg("sysfs_path='%s'", sysfs_path);
227 dbg_parse("udev_root = %s", udev_root);
228 dbg_parse("udev_config_filename = %s", udev_config_filename);
229 dbg_parse("udev_db_filename = %s", udev_db_filename);
230 dbg_parse("udev_rules_filename = %s", udev_rules_filename);
231 dbg_parse("udev_permissions_filename = %s", udev_permissions_filename);
232 dbg_parse("udev_log = %d", udev_log);
235 dbg_parse("udev_root = %s", udev_root);
236 dbg_parse("udev_config_filename = %s", udev_config_filename);
237 dbg_parse("udev_db_filename = %s", udev_db_filename);
238 dbg_parse("udev_rules_filename = %s", udev_rules_filename);
239 dbg_parse("udev_permissions_filename = %s", udev_permissions_filename);
240 dbg_parse("udev_log_str = %d", udev_log);
243 void udev_init_config(void)