IFS=,

SPECIAL="break,\
	:,\
	continue,\
	. /dev/null,\
	eval,\
	exec,\
	export -p,\
	readonly -p,\
	set,\
	shift 0,\
	times,\
	trap,\
	unset foo"

UTILS="alias,\
	bg,\
	bind,\
	cd,\
	command echo,\
	echo,\
	false,\
	fc -l,\
	fg,\
	getopts a var,\
	hash,\
	jobs,\
	printf a,\
	pwd,\
	read var < /dev/null,\
	test,\
	true,\
	type ls,\
	ulimit,\
	umask,\
	unalias -a,\
	wait"

set -e

# With 'command', variable assignments do not affect the shell environment.

set -- ${SPECIAL}
for cmd in "$@"
do
	${SH} -c "VAR=0; VAR=1 command ${cmd}; exit \${VAR}" >/dev/null 2>&1
done

set -- ${UTILS}
for cmd in "$@"
do
	${SH} -c "VAR=0; VAR=1 command ${cmd}; exit \${VAR}" >/dev/null 2>&1
done