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#!/bin/bash
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# Check which virtualization technology to use
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# We prefer kvm, kqemu, userspace in that order.
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export PATH=/sbin:/bin:/usr/sbin:/usr/bin
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[[ -x /usr/bin/qemu ]] && BIN=/usr/bin/qemu && ARGS="-cpu max"
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$(lsmod | grep -q '^kqemu ') && BIN=/usr/bin/qemu && ARGS="-kernel-kqemu -cpu host"
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[[ -c /dev/kvm && -x /usr/bin/kvm ]] && BIN=/usr/bin/kvm && ARGS="-cpu host"
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[[ -c /dev/kvm && -x /usr/bin/qemu-kvm ]] && BIN=/usr/bin/qemu-kvm && ARGS="-cpu host"
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[[ -c /dev/kvm && -x /usr/libexec/qemu-kvm ]] && BIN=/usr/libexec/qemu-kvm && ARGS="-cpu host"
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[[ -x /usr/bin/qemu-system-$(uname -i) ]] && BIN=/usr/bin/qemu-system-$(uname -i) && ARGS="-cpu max"
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[[ -c /dev/kvm && -x /usr/bin/qemu-system-$(uname -i) ]] && BIN=/usr/bin/qemu-system-$(uname -i) && ARGS="-enable-kvm -cpu host"
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[[ $BIN ]] || {
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echo "Could not find a working KVM or QEMU to test with!" >&2
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echo "Please install kvm or qemu." >&2
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exit 1
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}
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# Provide rng device sourcing the hosts /dev/urandom and other standard parameters
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ARGS="$ARGS -smp 2 -m 512 -nodefaults -vga none -display none -no-reboot -device virtio-rng-pci"
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if ! [[ $* = *-daemonize* ]] && ! [[ $* = *-daemonize* ]]; then
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ARGS="$ARGS -serial stdio"
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fi
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KVERSION=${KVERSION-$(uname -r)}
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VMLINUZ="/lib/modules/${KVERSION}/vmlinuz"
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if ! [ -f "$VMLINUZ" ]; then
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[[ -f /etc/machine-id ]] && read MACHINE_ID < /etc/machine-id
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if [[ $MACHINE_ID ]] && ( [[ -d /boot/${MACHINE_ID} ]] || [[ -L /boot/${MACHINE_ID} ]] ); then
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VMLINUZ="/boot/${MACHINE_ID}/$KVERSION/linux"
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else
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VMLINUZ="/boot/vmlinuz-${KVERSION}"
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fi
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fi
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exec $BIN $ARGS -kernel $VMLINUZ "$@"
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