# This test assumes that whatever mechanism cd -P uses to determine the
# pathname to the current directory if it is longer than PATH_MAX requires
# read permission on all parent directories. It also works if this
# requirement always applies.

set -e
L=$(getconf PATH_MAX / 2>/dev/null) || L=4096
[ "$L" -lt 100000 ] 2>/dev/null || L=4096
L=$((L+100))
T=$(mktemp -d ${TMPDIR:-/tmp}/sh-test.XXXXXX)
trap 'chmod u+r ${T}; rm -rf ${T}' 0
cd -Pe $T
D=$(pwd)
chmod u-r "$D"
if [ -r "$D" ]; then
	# Running as root, cannot test.
	exit 0
fi
set +e
while [ ${#D} -lt $L ]; do
	mkdir veryverylongdirectoryname || exit
	cd -Pe veryverylongdirectoryname 2>/dev/null
	r=$?
	[ $r -gt 1 ] && exit $r
	if [ $r -eq 1 ]; then
		# Verify that the directory was changed correctly.
		cd -Pe .. || exit
		[ "$(pwd)" = "$D" ] || exit
		# Verify that omitting -e results in success.
		cd -P veryverylongdirectoryname 2>/dev/null || exit
		exit 0
	fi
	D=$D/veryverylongdirectoryname
done
echo "cd -Pe never returned 1"
exit 0