bash-completion/lsblk

_lsblk_module()
{
	local cur prev OPTS
	COMPREPLY=()
	cur="${COMP_WORDS[COMP_CWORD]}"
	prev="${COMP_WORDS[COMP_CWORD-1]}"

	LSBLK_COLS_ALL="NAME KNAME MAJ:MIN FSTYPE MOUNTPOINT
		LABEL UUID PARTTYPE PARTLABEL PARTUUID PARTFLAGS
		RA RO RM
		MODEL SIZE STATE OWNER GROUP MODE
		ALIGNMENT MIN-IO OPT-IO PHY-SEC LOG-SEC
		ROTA SCHED RQ-SIZE TYPE DISC-ALN
		DISC-GRAN DISC-MAX DISC-ZERO WSAME WWN
		RAND PKNAME HCTL TRAN REV VENDOR"

	case $prev in
		'-e'|'--exclude'|'-I'|'--include')
			local realcur prefix MAJOR_ALL MAJOR I J
			realcur="${cur##*,}"
			prefix="${cur%$realcur}"
			for I in /sys/dev/block/*; do
				J=${I##*/}
				MAJOR_ALL="$MAJOR_ALL ${J%%:*}"
			done
			for WORD in $MAJOR_ALL; do
				if ! [[ $prefix == *"$WORD"* ]]; then
					MAJOR="$WORD $MAJOR"
				fi
			done
			compopt -o nospace
			COMPREPLY=( $(compgen -P "$prefix" -W "$MAJOR" -S ',' -- $realcur) )
			return 0
			;;
		'-o'|'--output')
			local prefix realcur LSBLK_COLS
			realcur="${cur##*,}"
			prefix="${cur%$realcur}"
			for WORD in $LSBLK_COLS_ALL; do
				if ! [[ $prefix == *"$WORD"* ]]; then
					LSBLK_COLS="$WORD $LSBLK_COLS"
				fi
			done
			compopt -o nospace
			COMPREPLY=( $(compgen -P "$prefix" -W "$LSBLK_COLS" -S ',' -- $realcur) )
			return 0
			;;
		'-x'|'--sort')
			compopt -o nospace
			COMPREPLY=( $(compgen -W "$LSBLK_COLS_ALL"  -- $cur) )
			return 0
			;;
		'-h'|'--help'|'-V'|'--version')
			return 0
			;;
	esac
	case $cur in
		-*)
			OPTS="--all
				--bytes
				--nodeps
				--discard
				--exclude
				--fs
				--help
				--include
				--ascii
				--list
				--perms
				--noheadings
				--output
				--pairs
				--raw
				--inverse
				--topology
				--scsi
				--sort
				--help
				--version"
			COMPREPLY=( $(compgen -W "${OPTS[*]}" -- $cur) )
			return 0
			;;
	esac
	COMPREPLY=( $(compgen -W "$($1 -pnro name)" -- $cur) )
	return 0
}
complete -F _lsblk_module lsblk