# Calculate comment=# ini(container.type)==host path=/usr/libexec chmod=0755
#!/bin/bash

ACTION="$1" 
DEVNAME="$2" 
MAJOR="$3" 
MINOR="$4" 
SUBSYSTEM="$5" 

if [[ -z $MINOR ]] || [[ -z $DEVNAME ]]
then
	exit 0
fi

shift 5
COMPS="$*"

process_device() {
	local comp=$1
	if [[ "$ACTION" == "add" ]]
	then
		lxc-device -n ${comp} -- add $DEVNAME
		lxc-attach -n ${comp} $(stat -L -c "chmod %a %n" $DEVNAME)
		lxc-attach -n ${comp} $(stat -L -c "chown %u:%g %n" $DEVNAME)
		udevadm trigger --action=change --name-match=$DEVNAME
	fi
	if [[ "$ACTION" == "remove" ]]
	then
		lxc-attach -n ${comp} -- rm $DEVNAME
		if [[ -n $MAJOR ]] && [[ -n $MINOR ]]
		then
			if [[ $SUBSYSTEM == "block" ]]
			then
				lxc-cgroup -n ${comp} devices.deny "b $MAJOR:$MINOR rwm" 
			else
				lxc-cgroup -n ${comp} devices.deny "c $MAJOR:$MINOR rwm" 
			fi
		fi
		udevadm trigger --action=remove --name-match=$DEVNAME
	fi
}

if [[ $COMPS == "all" ]]
then
	for COMP in $(lxc-ls -1q 2>/dev/null)
	do
		if lxc-info -n $COMP -c lxc.environment | grep LXC_DESKTOP=1 &>/dev/null
		then
			process_device $COMP
		fi
	done
else
	for COMP in $COMPS
	do
		if [[ -n $(lxc-info -pH -n $COMP) ]]
		then
			process_device $COMP
		fi
	done
fi