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/>.
30 static struct udev_hwdb
*hwdb
;
32 int udev_builtin_hwdb_lookup(struct udev_device
*dev
, const char *modalias
, bool test
) {
33 struct udev_list_entry
*entry
;
39 udev_list_entry_foreach(entry
, udev_hwdb_get_properties_list_entry(hwdb
, modalias
, 0)) {
40 if (udev_builtin_add_property(dev
, test
,
41 udev_list_entry_get_name(entry
),
42 udev_list_entry_get_value(entry
)) < 0)
49 static const char *modalias_usb(struct udev_device
*dev
, char *s
, size_t size
) {
53 v
= udev_device_get_sysattr_value(dev
, "idVendor");
56 p
= udev_device_get_sysattr_value(dev
, "idProduct");
59 vn
= strtol(v
, NULL
, 16);
62 pn
= strtol(p
, NULL
, 16);
65 snprintf(s
, size
, "usb:v%04Xp%04X*", vn
, pn
);
69 static int udev_builtin_hwdb_search(struct udev_device
*dev
, const char *subsystem
, bool test
) {
70 struct udev_device
*d
;
74 for (d
= dev
; d
; d
= udev_device_get_parent(d
)) {
76 const char *modalias
= NULL
;
78 dsubsys
= udev_device_get_subsystem(d
);
82 /* look only at devices of a specific subsystem */
83 if (subsystem
&& !streq(dsubsys
, subsystem
))
86 /* the usb_device does not have a modalias, compose one */
87 if (streq(dsubsys
, "usb"))
88 modalias
= modalias_usb(dev
, s
, sizeof(s
));
91 modalias
= udev_device_get_property_value(d
, "MODALIAS");
95 n
= udev_builtin_hwdb_lookup(dev
, modalias
, test
);
103 static int builtin_hwdb(struct udev_device
*dev
, int argc
, char *argv
[], bool test
) {
104 static const struct option options
[] = {
105 { "subsystem", required_argument
, NULL
, 's' },
108 const char *subsystem
= NULL
;
116 option
= getopt_long(argc
, argv
, "s", options
, NULL
);
127 if (udev_builtin_hwdb_search(dev
, subsystem
, test
) < 0)
132 /* called at udev startup and reload */
133 static int builtin_hwdb_init(struct udev
*udev
)
137 hwdb
= udev_hwdb_new(udev
);
143 /* called on udev shutdown and reload request */
144 static void builtin_hwdb_exit(struct udev
*udev
)
146 hwdb
= udev_hwdb_unref(hwdb
);
149 /* called every couple of seconds during event activity; 'true' if config has changed */
150 static bool builtin_hwdb_validate(struct udev
*udev
)
152 return udev_hwdb_validate(hwdb
);
155 const struct udev_builtin udev_builtin_hwdb
= {
158 .init
= builtin_hwdb_init
,
159 .exit
= builtin_hwdb_exit
,
160 .validate
= builtin_hwdb_validate
,
161 .help
= "hardware database",