T=`mktemp -d "${TMPDIR:-/tmp}/sh-test.XXXXXXXX"` || exit
trap 'rm -rf "${T}"' 0
cat <<EOF >"$T/testshellproc"
printf 'this '
echo is a test
EOF
chmod 755 "$T/testshellproc"
PATH=$T:$PATH
[ "`testshellproc`" = "this is a test" ]