_wdctl_module()
{
	local cur prev OPTS
	COMPREPLY=()
	cur="${COMP_WORDS[COMP_CWORD]}"
	prev="${COMP_WORDS[COMP_CWORD-1]}"
	case $prev in
		'-f'|'--flags')
			local FLAGS
			FLAGS="ALARMONLY
				CARDRESET
				EXTERN1
				EXTERN2
				FANFAULT
				KEEPALIVEPING
				MAGICCLOSE
				OVERHEAT
				POWEROVER
				POWERUNDER
				PRETIMEOUT
				SETTIMEOUT"
			COMPREPLY=( $(compgen -W "$FLAGS" -- $cur) )
			return 0
			;;
		'-o'|'--output')
			# FIXME: how to append to a string with compgen?
			local OUTPUT
			OUTPUT="FLAG DESCRIPTION STATUS BOOT-STATUS DEVICE"
			compopt -o nospace
			COMPREPLY=( $(compgen -W "$OUTPUT" -S ',' -- $cur) )
			return 0
			;;
		'-s'|'--settimeout')
			COMPREPLY=( $(compgen -W "seconds" -- $cur) )
			return 0
			;;
		'-h'|'--help'|'-V'|'--version')
			return 0
			;;
	esac
	case $cur in
		-*)
			OPTS="--flags
				--noflags
				--noident
				--noheadings
				--oneline
				--output
				--raw
				--notimeouts
				--settimeout
				--flags-only
				--help
				--version"
			COMPREPLY=( $(compgen -W "${OPTS[*]}" -- $cur) )
			return 0
			;;
	esac
	local IFS=$'\n'
	compopt -o filenames
	COMPREPLY=( $(compgen -f -- ${cur:-"/dev/"}) )
	return 0
}
complete -F _wdctl_module wdctl