static struct udev_hwdb *hwdb;
int udev_builtin_hwdb_lookup(struct udev_device *dev,
- const char *modalias, const char *filter, bool test) {
+ const char *prefix, const char *modalias,
+ const char *filter, bool test) {
+ struct udev_list_entry *list;
struct udev_list_entry *entry;
int n = 0;
if (!hwdb)
return -ENOENT;
- udev_list_entry_foreach(entry, udev_hwdb_get_properties_list_entry(hwdb, modalias, 0)) {
+ if (prefix) {
+ _cleanup_free_ const char *lookup;
+
+ lookup = strjoin(prefix, modalias, NULL);
+ if (!lookup)
+ return -ENOMEM;
+ list = udev_hwdb_get_properties_list_entry(hwdb, lookup, 0);
+ } else
+ list = udev_hwdb_get_properties_list_entry(hwdb, modalias, 0);
+
+ udev_list_entry_foreach(entry, list) {
if (filter && fnmatch(filter, udev_list_entry_get_name(entry), FNM_NOESCAPE) != 0)
continue;
}
static int udev_builtin_hwdb_search(struct udev_device *dev, struct udev_device *srcdev,
- const char *subsystem, const char *filter, bool test) {
+ const char *subsystem, const char *prefix,
+ const char *filter, bool test) {
struct udev_device *d;
char s[16];
- int n = 0;
+ bool last = false;
+ int r = 0;
- for (d = srcdev; d; d = udev_device_get_parent(d)) {
+ for (d = srcdev; d && !last; d = udev_device_get_parent(d)) {
const char *dsubsys;
const char *modalias = NULL;
if (subsystem && !streq(dsubsys, subsystem))
continue;
- /* the usb_device does not have a modalias, compose one */
- if (streq(dsubsys, "usb"))
- modalias = modalias_usb(d, s, sizeof(s));
+ modalias = udev_device_get_property_value(d, "MODALIAS");
- if (!modalias)
- modalias = udev_device_get_property_value(d, "MODALIAS");
+ if (streq(dsubsys, "usb") && streq_ptr(udev_device_get_devtype(d), "usb_device")) {
+ /* if the usb_device does not have a modalias, compose one */
+ if (!modalias)
+ modalias = modalias_usb(d, s, sizeof(s));
+
+ /* avoid looking at any parent device, they are usually just a USB hub */
+ last = true;
+ }
if (!modalias)
continue;
- n = udev_builtin_hwdb_lookup(dev, modalias, filter, test);
- if (n > 0)
+ r = udev_builtin_hwdb_lookup(dev, prefix, modalias, filter, test);
+ if (r > 0)
break;
}
- return n;
+ return r;
}
static int builtin_hwdb(struct udev_device *dev, int argc, char *argv[], bool test) {
{ "filter", required_argument, NULL, 'f' },
{ "device", required_argument, NULL, 'd' },
{ "subsystem", required_argument, NULL, 's' },
+ { "lookup-prefix", required_argument, NULL, 'p' },
{}
};
const char *filter = NULL;
const char *device = NULL;
const char *subsystem = NULL;
+ const char *prefix = NULL;
struct udev_device *srcdev;
if (!hwdb)
for (;;) {
int option;
- option = getopt_long(argc, argv, "s", options, NULL);
+ option = getopt_long(argc, argv, "f:d:s:p:", options, NULL);
if (option == -1)
break;
case 's':
subsystem = optarg;
break;
+
+ case 'p':
+ prefix = optarg;
+ break;
}
}
+ /* query a specific key given as argument */
+ if (argv[optind]) {
+ if (udev_builtin_hwdb_lookup(dev, prefix, argv[optind], filter, test) > 0)
+ return EXIT_SUCCESS;
+ return EXIT_FAILURE;
+ }
+
/* read data from another device than the device we will store the data */
if (device) {
srcdev = udev_device_new_from_device_id(udev_device_get_udev(dev), device);
} else
srcdev = dev;
- if (udev_builtin_hwdb_search(dev, srcdev, subsystem, filter, test) < 0)
- return EXIT_FAILURE;
- return EXIT_SUCCESS;
+ if (udev_builtin_hwdb_search(dev, srcdev, subsystem, prefix, filter, test) > 0)
+ return EXIT_SUCCESS;
+ return EXIT_FAILURE;
}
/* called at udev startup and reload */
-static int builtin_hwdb_init(struct udev *udev)
-{
+static int builtin_hwdb_init(struct udev *udev) {
if (hwdb)
return 0;
hwdb = udev_hwdb_new(udev);
}
/* called on udev shutdown and reload request */
-static void builtin_hwdb_exit(struct udev *udev)
-{
+static void builtin_hwdb_exit(struct udev *udev) {
hwdb = udev_hwdb_unref(hwdb);
}
/* called every couple of seconds during event activity; 'true' if config has changed */
-static bool builtin_hwdb_validate(struct udev *udev)
-{
+static bool builtin_hwdb_validate(struct udev *udev) {
return udev_hwdb_validate(hwdb);
}