char *minor = hotplug_msg_find_var(msg, "MINOR");
char *major = hotplug_msg_find_var(msg, "MAJOR");
char *subsystem = hotplug_msg_find_var(msg, "SUBSYSTEM");
char *minor = hotplug_msg_find_var(msg, "MINOR");
char *major = hotplug_msg_find_var(msg, "MAJOR");
char *subsystem = hotplug_msg_find_var(msg, "SUBSYSTEM");