+ static const char *usage =
+ "Usage: udevadm info OPTIONS\n"
+ " --query=<type> query device information:\n"
+ " name name of device node\n"
+ " symlink pointing to node\n"
+ " path sys device path\n"
+ " property the device properties\n"
+ " all all values\n"
+ " --path=<syspath> sys device path used for query or attribute walk\n"
+ " --name=<name> node or symlink name used for query or attribute walk\n"
+ " --root prepend dev directory to path names\n"
+ " --attribute-walk print all key matches while walking along the chain\n"
+ " of parent devices\n"
+ " --device-id-of-file=<file> print major:minor of device containing this file\n"
+ " --export export key/value pairs\n"
+ " --export-prefix export the key name with a prefix\n"
+ " --export-db export the content of the udev database\n"
+ " --cleanup-db cleanup the udev database\n"
+ " --help\n";
+