2 This file is part of systemd.
4 Copyright 2012 Kay Sievers <kay@vrfy.org>
6 systemd is free software; you can redistribute it and/or modify it
7 under the terms of the GNU Lesser General Public License as published by
8 the Free Software Foundation; either version 2.1 of the License, or
9 (at your option) any later version.
11 systemd is distributed in the hope that it will be useful, but
12 WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Lesser General Public License for more details.
16 You should have received a copy of the GNU Lesser General Public License
17 along with systemd; If not, see <http://www.gnu.org/licenses/>.
31 static struct udev_hwdb *hwdb;
33 int udev_builtin_hwdb_lookup(struct udev_device *dev,
34 const char *modalias, const char *filter, bool test) {
35 struct udev_list_entry *entry;
41 udev_list_entry_foreach(entry, udev_hwdb_get_properties_list_entry(hwdb, modalias, 0)) {
42 if (filter && fnmatch(filter, udev_list_entry_get_name(entry), FNM_NOESCAPE) != 0)
45 if (udev_builtin_add_property(dev, test,
46 udev_list_entry_get_name(entry),
47 udev_list_entry_get_value(entry)) < 0)
54 static const char *modalias_usb(struct udev_device *dev, char *s, size_t size) {
58 v = udev_device_get_sysattr_value(dev, "idVendor");
61 p = udev_device_get_sysattr_value(dev, "idProduct");
64 vn = strtol(v, NULL, 16);
67 pn = strtol(p, NULL, 16);
70 snprintf(s, size, "usb:v%04Xp%04X*", vn, pn);
74 static int udev_builtin_hwdb_search(struct udev_device *dev, struct udev_device *srcdev,
75 const char *subsystem, const char *filter, bool test) {
76 struct udev_device *d;
80 for (d = srcdev; d; d = udev_device_get_parent(d)) {
82 const char *modalias = NULL;
84 dsubsys = udev_device_get_subsystem(d);
88 /* look only at devices of a specific subsystem */
89 if (subsystem && !streq(dsubsys, subsystem))
92 /* the usb_device does not have a modalias, compose one */
93 if (streq(dsubsys, "usb"))
94 modalias = modalias_usb(d, s, sizeof(s));
97 modalias = udev_device_get_property_value(d, "MODALIAS");
102 n = udev_builtin_hwdb_lookup(dev, modalias, filter, test);
110 static int builtin_hwdb(struct udev_device *dev, int argc, char *argv[], bool test) {
111 static const struct option options[] = {
112 { "filter", required_argument, NULL, 'f' },
113 { "device", required_argument, NULL, 'd' },
114 { "subsystem", required_argument, NULL, 's' },
117 const char *filter = NULL;
118 const char *device = NULL;
119 const char *subsystem = NULL;
120 struct udev_device *srcdev;
128 option = getopt_long(argc, argv, "s", options, NULL);
147 /* read data from another device than the device we will store the data */
149 srcdev = udev_device_new_from_device_id(udev_device_get_udev(dev), device);
155 if (udev_builtin_hwdb_search(dev, srcdev, subsystem, filter, test) < 0)
160 /* called at udev startup and reload */
161 static int builtin_hwdb_init(struct udev *udev)
165 hwdb = udev_hwdb_new(udev);
171 /* called on udev shutdown and reload request */
172 static void builtin_hwdb_exit(struct udev *udev)
174 hwdb = udev_hwdb_unref(hwdb);
177 /* called every couple of seconds during event activity; 'true' if config has changed */
178 static bool builtin_hwdb_validate(struct udev *udev)
180 return udev_hwdb_validate(hwdb);
183 const struct udev_builtin udev_builtin_hwdb = {
186 .init = builtin_hwdb_init,
187 .exit = builtin_hwdb_exit,
188 .validate = builtin_hwdb_validate,
189 .help = "hardware database",