Sync

run/run.sh

@@ -3,12 +3,12 @@ set -eu
 
 # Docker environment variabeles
 
-: ${BOOT:=''}.                     # URL of the ISO file
+: ${BOOT:=''}.                  # URL of the ISO file
 : ${DEBUG:=''}.               # Enable debug mode
 : ${ALLOCATE:='Y'}       # Preallocate diskspace
-: ${CPU_CORES:='1'}     # vCPU count
-: ${DISK_SIZE:='16G'}    # Initial disk size
-: ${RAM_SIZE:='512M'} # Amount of RAM
+: ${CPU_CORES:='1'}     # Amount of CPU cores
+: ${DISK_SIZE:='16G'}    # Initial data disk size
+: ${RAM_SIZE:='512M'} # Maximum RAM amount
 
 echo "Starting QEMU for Docker v${VERSION}..."
 
@@ -32,7 +32,7 @@ fi
 KVM_OPTS=""
 
 if [ -e /dev/kvm ] && sh -c 'echo -n > /dev/kvm' &> /dev/null; then
-  if [[ $(grep -e vmx -e svm /proc/cpuinfo) ]]; then
+  if grep -q -e vmx -e svm /proc/cpuinfo; then
     KVM_OPTS=",accel=kvm -enable-kvm -cpu host"
   fi
 fi
@@ -52,7 +52,7 @@ ARGS="${DEF_OPTS} ${CPU_OPTS} ${RAM_OPTS} ${KVM_OPTS} ${MON_OPTS} ${SERIAL_OPTS}
 
 set -m
 (
-  qemu-system-x86_64 ${ARGS} & echo $! > ${_QEMU_PID}
+  qemu-system-x86_64 ${ARGS:+ $ARGS} & echo $! > "${_QEMU_PID}"
 )
 set +m