# Define function wrapper for ls(1) with --color option if LS_COLORS is set;
# checks that color is available in the terminal within the function
if [[ ! -n $LS_COLORS ]] ; then
    return
fi

# Define function proper
ls() {
    local -i colors=$( {
        tput Co || tput colors
    } 2>/dev/null )
    if ((colors >= 8)) ; then
        command ls --color=auto "$@"
    else
        command ls "$@"
    fi
}