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_root
[PATH_MAX
];
43 char udev_db_filename
[PATH_MAX
+NAME_MAX
];
44 char udev_permissions_filename
[PATH_MAX
+NAME_MAX
];
45 char udev_rules_filename
[PATH_MAX
+NAME_MAX
];
46 char udev_config_filename
[PATH_MAX
+NAME_MAX
];
47 char default_mode_str
[NAME_MAX
];
50 static void init_variables(void)
52 /* fill up the defaults.
53 * If any config values are specified, they will
54 * override these values. */
55 strfieldcpy(udev_root
, UDEV_ROOT
);
56 strfieldcpy(udev_db_filename
, UDEV_DB
);
57 strfieldcpy(udev_config_filename
, UDEV_CONFIG_FILE
);
58 strfieldcpy(udev_rules_filename
, UDEV_RULES_FILE
);
59 strfieldcpy(udev_permissions_filename
, UDEV_PERMISSION_FILE
);
62 #define set_var(_name, _var) \
63 if (strcasecmp(variable, _name) == 0) { \
64 dbg_parse("%s = '%s'", _name, value); \
65 strncpy(_var, value, sizeof(_var)); \
68 static int parse_config_file(void)
78 fd
= fopen(udev_config_filename
, "r");
80 dbg("reading '%s' as config file", udev_config_filename
);
82 dbg("can't open '%s' as config file", udev_config_filename
);
86 /* loop through the whole file */
89 temp
= fgets(line
, sizeof(line
), fd
);
94 dbg_parse("read '%s'", temp
);
96 /* eat the whitespace at the beginning of the line */
97 while (isspace(*temp
))
104 /* see if this is a comment */
105 if (*temp
== COMMENT_CHARACTER
)
108 retval
= get_pair(&temp
, &variable
, &value
);
112 dbg_parse("variable = '%s', value = '%s'", variable
, value
);
114 set_var("udev_root", udev_root
);
115 set_var("udev_db", udev_db_filename
);
116 set_var("udev_rules", udev_rules_filename
);
117 set_var("udev_permissions", udev_permissions_filename
);
118 set_var("default_mode", default_mode_str
);
120 dbg_parse("%s:%d:%Zd: error parsing '%s'", udev_config_filename
,
121 lineno
, temp
- line
, temp
);
127 static void get_dirs(void)
132 retval
= sysfs_get_mnt_path(sysfs_path
, SYSFS_PATH_MAX
);
134 dbg("sysfs_get_mnt_path failed");
136 /* see if we should try to override any of the default values */
137 temp
= getenv("UDEV_TEST");
139 /* hm testing is happening, use the specified values, if they are present */
140 temp
= getenv("SYSFS_PATH");
142 strfieldcpy(sysfs_path
, temp
);
143 temp
= getenv("UDEV_CONFIG_FILE");
145 strfieldcpy(udev_config_filename
, temp
);
147 dbg("sysfs_path='%s'", sysfs_path
);
149 dbg_parse("udev_root = %s", udev_root
);
150 dbg_parse("udev_config_filename = %s", udev_config_filename
);
151 dbg_parse("udev_db_filename = %s", udev_db_filename
);
152 dbg_parse("udev_rules_filename = %s", udev_rules_filename
);
153 dbg_parse("udev_permissions_filename = %s", udev_permissions_filename
);
156 dbg_parse("udev_root = %s", udev_root
);
157 dbg_parse("udev_config_filename = %s", udev_config_filename
);
158 dbg_parse("udev_db_filename = %s", udev_db_filename
);
159 dbg_parse("udev_rules_filename = %s", udev_rules_filename
);
160 dbg_parse("udev_permissions_filename = %s", udev_permissions_filename
);
163 void udev_init_config(void)