util-linux/bash-completion/cfdisk

_cfdisk_module()
{
	local cur prev OPTS
	COMPREPLY=()
	cur="${COMP_WORDS[COMP_CWORD]}"
	prev="${COMP_WORDS[COMP_CWORD-1]}"
	case $prev in
		'-c')
			COMPREPLY=( $(compgen -W "cylinders" -- $cur) )
			return 0
			;;
		'-h')
			COMPREPLY=( $(compgen -W "heads" -- $cur) )
			return 0
			;;
		'-s')
			COMPREPLY=( $(compgen -W "sectors" -- $cur) )
			return 0
			;;
		'-v')
			return 0
			;;
	esac
	case $cur in
		-*)
			OPTS="-a -z -c -h -s"
			COMPREPLY=( $(compgen -W "${OPTS[*]}" -- $cur) )
			return 0
			;;
	esac
	local DEV TYPE DEVICES=''
	while read DEV TYPE; do
		[ $TYPE = 'disk' ] && DEVICES+="$DEV "
	done < <(lsblk -pnro name,type)
	COMPREPLY=( $(compgen -W "$DEVICES" -- $cur) )
	return 0
}
complete -F _cfdisk_module cfdisk