check for system arch, returns [64|32]

getarg.bash

# check for system arch, returns [64|32]

function getarch()
{   
    [ -z "$MACHTYPE" ] && _arch_var_arch=$(uname -m) || _arch_var_arch=$(printf "%s\\n" "$MACHTYPE" | cut -d- -f1)

    case $_arch_var_arch in
        x86_64)
            _arch_var_arch=64;
            ;;
        i686)
            _arch_var_arch=32;
            ;;
        *)
            return 1
            ;;
    esac

    printf "%s\\n" "$_arch_var_arch"
}