OS utility functions.

utils.sh

#!/bin/bash

get_os() {

    local os=""
    local kernelName=""

    # - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

    kernelName="$(uname -s)"

    if [ "$kernelName" == "Darwin" ]; then
        os="macos"
    elif [ "$kernelName" == "Linux" ] && [ -e "/etc/lsb-release" ]; then
        if [ "$(cat < '/etc/lsb-release' | grep DISTRIB_ID | grep -o Ubuntu)" == "Ubuntu" ]; then
            os="ubuntu"
        elif [ "$(bash <(cat /etc/os-release; echo "echo ${ID/*, /}"))" == "kali" ]; then
            os="kali-linux"
        fi
    else
        os="$kernelName"
    fi

    printf "%s" "$os"

}

get_os_version() {

    local os=""
    local os_version=""

    # - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

    os="$(get_os)"

    if [ "$os" == "macos" ]; then
        os_version="$(sw_vers -productVersion)"
    elif [ "$os" == "ubuntu" ]; then
        os_version="$(lsb_release -d | cut -f2 | cut -d' ' -f2)"
    elif [ "$os" == "kali-linux" ]; then
        os_version="$(bash <(cat /etc/os-release; echo "echo ${VERSION/*, /}"))"
    fi

    printf "%s" "$os_version"

}