#!/bin/sh
#
# 2014 Daniel Heule  (hda at sfs.biz)
# 2014 Thomas Oettli (otho at sfs.biz)
#
# This file is part of cdist.
#
# cdist is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# cdist is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with cdist. If not, see <http://www.gnu.org/licenses/>.
#
#

# FIXME: other system types (not linux ...)

if [ -d "/proc/vz" -a ! -d "/proc/bc" ]; then
    echo openvz
    exit
fi

if [ -e "/proc/1/environ" ] &&
    cat "/proc/1/environ" | tr '\000' '\n' | grep -Eiq '^container='; then
    echo lxc
    exit
fi

if [ -r /proc/cpuinfo ]; then
    # this should only exist on virtual guest machines,
    # tested on vmware, xen, kvm
    if grep -q "hypervisor" /proc/cpuinfo; then
        # this file is aviable in xen guest systems
        if [ -r /sys/hypervisor/type ]; then
            if grep -q -i "xen" /sys/hypervisor/type; then
                echo virtual_by_xen
                exit 
            fi
        else
            if [ -r /sys/class/dmi/id/product_name ]; then
                if grep -q -i 'vmware' /sys/class/dmi/id/product_name; then
                    echo "virtual_by_vmware"
                    exit
                elif grep -q -i 'bochs' /sys/class/dmi/id/product_name; then
                    echo "virtual_by_kvm"
                    exit 
                elif grep -q -i 'virtualbox' /sys/class/dmi/id/product_name; then
                    echo "virtual_by_virtualbox"
                    exit 
                fi
            fi
        fi
        echo "virtual_by_unknown"
    else
        echo "physical"
    fi
else
    echo "unknown"
fi