#!/usr/bin/python2
#
# The Qubes OS Project, http://www.qubes-os.org
#
# Copyright (C) 2011  Marek Marczykowski <marmarek@invisiblethingslab.com>
#
# This program 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 2
# of the License, or (at your option) any later version.
#
# This program 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 this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
#
#

from qubes.qubes import QubesVmCollection,QubesException
from qubes.qubes import shutdown_counter_max
from optparse import OptionParser;
import sys
import time

def main():
    usage = "usage: %prog [options] <vm-name>"
    parser = OptionParser (usage)
    
    parser.add_option ("-q", "--quiet", action="store_false", dest="verbose", default=True)
    parser.add_option ("--force", action="store_true", dest="force", default=False,
                      help="Force operation, even if may damage other VMs (eg shutdown of NetVM)")
    parser.add_option ("--wait", action="store_true", dest="wait_for_shutdown", default=False,
                      help="Wait for the VM(s) to shutdown")

    (options, args) = parser.parse_args ()
    if (len (args) != 1):
        parser.error ("You must specify VM name!")
    vmname = args[0]

    qvm_collection = QubesVmCollection()
    qvm_collection.lock_db_for_reading()
    qvm_collection.load()
    qvm_collection.unlock_db()

    vm = qvm_collection.get_vm_by_name(vmname)
    if vm is None:
        print >> sys.stderr, "A VM with the name '{0}' does not exist in the system.".format(vmname)
        exit(1)

    try:
        vm.shutdown(force=options.force)
    except (IOError, OSError, QubesException) as err:
        print >> sys.stderr, "ERROR: {0}".format(err)
        exit (1)

    if options.wait_for_shutdown:
        if options.verbose:
            print >> sys.stderr, "Waiting for the VM(s) to shutdown..."
        shutdown_counter = 0

        while vm.is_running():
            if shutdown_counter > shutdown_counter_max:
                # kill the VM
                if options.verbose:
                    print >> sys.stderr, "Killing the (apparently hanging) VM '{0}'...".format(vm.name)
                vm.force_shutdown()

            shutdown_counter += 1
            time.sleep (1)

main()