Simplify

#!/usr/bin/env bash

set -eu

if /run/install.sh; then

echo "Starting QEMU..."

else

  echo "Failed to start (code $?)" && exit 81

fi

source /run/disk.sh

[ -z "${KVM_DISK_OPTS}" ] && echo "Error: Failed to setup disks..." && exit 83

source /run/network.sh

[ -z "${KVM_NET_OPTS}" ] && echo "Error: Failed to setup network..." && exit 84

KVM_SERIAL_OPTS="\

    -serial mon:stdio \

    -device virtio-serial-pci,id=virtio-serial0,bus=pcie.0,addr=0x3"

source /run/power.sh

[ -z "${KVM_MON_OPTS}" ] && echo "Error: Failed to setup monitor..." && exit 87

. /run/install.sh

. /run/disk.sh

. /run/network.sh

. /run/power.sh

KVM_ACC_OPTS=""

[ -z "${KVM_ACC_OPTS}" ] && echo "Error: KVM acceleration is disabled.." && exit 88

RAM_SIZE=$(echo "${RAM_SIZE}" | sed 's/MB/M/g;s/GB/G/g;s/TB/T/g')

KVM_SERIAL_OPTS="-serial mon:stdio -device virtio-serial-pci,id=virtio-serial0,bus=pcie.0,addr=0x3"

EXTRA_OPTS="-nographic -object rng-random,id=rng0,filename=/dev/urandom -device virtio-rng-pci,rng=rng0 -device virtio-balloon-pci,id=balloon0,bus=pcie.0,addr=0x4"

ARGS="-m ${RAM_SIZE} -smp ${CPU_CORES} ${KVM_ACC_OPTS} ${EXTRA_OPTS} ${KVM_MON_OPTS} ${KVM_SERIAL_OPTS} ${KVM_NET_OPTS} ${KVM_DISK_OPTS}"

set -m

(

  for _SIGNAL in {1..64}; do trap "echo Caught trap ${_SIGNAL} for the QEMU process" "${_SIGNAL}"; done

  for _SIGNAL in {1..64}; do

    trap "echo Caught trap ${_SIGNAL} for the QEMU process" "${_SIGNAL}";

  done

  qemu-system-x86_64 ${ARGS} & echo $! > ${_QEMU_PID}

)

set +m