openwrt/package/base-files/files/etc/hotplug2-init.rules

DEVICENAME ~~ (null|full|ptmx|tty|zero) {
	nothrottle
	makedev /dev/%DEVICENAME% 0666
	next
}

DEVICENAME ~~ (tun|tap[0-9]) {
	nothrottle
	makedev /dev/net/%DEVICENAME% 0644
	next
}

DEVICENAME ~~ (ppp) {
	nothrottle
	makedev /dev/%DEVICENAME% 0600
	next
}

DEVICENAME ~~ (controlC[0-9]|pcmC0D0*) {
	nothrottle
	makedev /dev/snd/%DEVICENAME% 0644
	next
}

DEVPATH is set {
	nothrottle
	makedev /dev/%DEVICENAME% 0644
}


SUBSYSTEM ~~ button {
	exec kill -USR1 1 ;
}