if uname -s Darwin then alias ls ls -FG elif ls --version grep Stallma

if [ `uname -s` = Darwin ]; then
    alias ls="ls -FG"
elif ls --version | grep Stallman >/dev/null; then
    alias ls="ls --color=auto -phs"
else
    alias ls="ls -phs"
fi

if grep --version | grep GNU >/dev/null; then
    export GREP_OPTIONS='--color=auto --directories=recurse'
fi