OS detection

os-detection.sh

case "${OSTYPE}" in
    freebsd*|darwin*|linux*)
        [ -z "$PS1" ] && return
        stty -ixon
        stty start undef
        stty stop undef
        OS=`uname -s`
        REV=`uname -r`
        MACH=`uname -m`
        function GetVersionFromFile () {
            VERSION=`cat $1 | tr "\n" ' ' | sed s/.*VERSION.*=\ // `
        }
        if [ "${OS}" = "SunOS" ] ; then
            OS=Solaris
            ARCH=`uname -p`
            OSSTR="${OS} ${REV}(${ARCH} `uname -v`)"
        elif [ "${OS}" = "AIX" ] ; then
            OSSTR="${OS} `oslevel` (`oslevel -r`)"
        elif [ "${OS}" = "Linux" ] ; then
            KERNEL=`uname -r`
            if [ -f /etc/redhat-release ] ; then
                DIST='RedHat'
                DIST_VERSION=''
                DIST2=''
                PSUEDONAME=`cat /etc/redhat-release | sed -e 's/.*(//' | sed -e 's/)//'`
                REV=`cat /etc/redhat-release | sed -e 's/.*release //' | sed -e 's/ .*//'`
            elif [ -f /etc/SUSE-release ] ; then
                DIST="SUSE"
                DIST_VERSION=''
                DIST2=`cat /etc/SUSE-release | tr "\n" ' '| sed -e 's/VERSION.*//'`
                PSUEDONAME=''
                REV=`cat /etc/SUSE-release | tr "\n" ' ' | sed -e 's/.*= //'`
            elif [ -f /etc/mandrake-release ] ; then
                DIST='Mandrake'
                DIST_VERSION=''
                DIST2=''
                PSUEDONAME=`cat /etc/mandrake-release | sed -e 's/.*(//' | sed -e 's/)//'`
                REV=`cat /etc/mandrake-release | sed -e 's/.*release //' | sed -e 's/ .*//'`
            elif [ -f /etc/debian_version ] ; then
                if ! type -p lsb_release > /dev/null; then
                    sudo apt-get install -y lsb-release
                fi
                DIST="$(lsb_release -i -s)"
                DIST_VERSION="$(lsb_release -s -r)"
                DIST2="Debian `cat /etc/debian_version`"
                PSUEDONAME=''
                REV=""
            fi
            if [ -f /etc/UnitedLinux-release ] ; then
                DIST="${DIST}[`cat /etc/UnitedLinux-release | tr "\n" ' ' | sed -e 's/VERSION.*//'`]"
            fi
            OSSTR="${OS} ${DIST} ${REV}(${PSUEDONAME} ${KERNEL} ${MACH})"
        fi
esac