thesis-vm - Launches a serial console enabled VM and connects to ttyS0 with gnu screen Andres Hernandez - tonejito September 2013

thesis-vm

#!/bin/bash
#	thesis-vm - Launches a serial console enabled VM and connects to ttyS0 with gnu screen
#	Andres Hernandez - tonejito
#	September 2013

RM=rm
TEE=tee
SED=sed
GREP=grep
ECHO=echo
SLEEP=sleep
CLEAR=clear
RESET=reset
SOCAT=socat
SCREEN=screen
MKTEMP=mktemp
KILLALL=killall
VBOXHEADLESS=VBoxHeadless

# Get a random tmp filename
PASSTHROUGH=`$MKTEMP`
# Sleep for a couple seconds
SECS=2

# Virtual Machine name and location
VM_NAME=Thesis
VIRTUALBOX_VMs="$HOME/VirtualBox VMs"
VM_NAME_VBOX="$VIRTUALBOX_VMs/$VM_NAME/$VM_NAME.vbox"

# Filter used with socat output
FILTER='.*N\ PTY\ is\ '
# Pattern to find at $VM_NAME_VBOX
PATTERN='^\ \+<Port\ slot=\"[[:digit:]]\"\ enabled=\"true\"\ IOBase=\"0x[32]f8\"\ IRQ=\"[43]\" server=\"true\"\ path=\"\(.*\)\"\ hostMode=\"HostPipe\"\/>\ *$'

# Get the UNIX domain socket names
UNIX_NAME=`$GREP "$PATTERN" "$VM_NAME_VBOX" | $SED -e "s/$PATTERN/\1/g" | $SED -n "1p"`

# Start the VM if the socket is not found
if [ ! -x $UNIX_NAME ]
then
  $VBOXHEADLESS --startvm $VM_NAME &
  $SLEEP $SECS
fi

# Detach any existing PTY
$KILLALL $SOCAT 

# Map the UNIX domain socket to a PTY and get its name
$SOCAT -d -d $UNIX_NAME PTY,wait-slave 2>&1 | $TEE $PASSTHROUGH &>/dev/null &
$SLEEP $SECS
PTY_NAME=`$GREP "$FILTER" $PASSTHROUGH | $SED -e "s/$FILTER//g"`

# Attach to serial console or die
if [ -n "$PTY_NAME" ]
then
  $SCREEN $PTY_NAME
  $RM $UNIX_NAME
else
  $ECHO "= T - T ="
  exit 1
fi