core-admin/qvm-tools/qvm-grow-root

#!/usr/bin/python2
# -*- encoding: utf8 -*-
#
# The Qubes OS Project, http://www.qubes-os.org
#
# Copyright (C) 2014  Marek Marczykowski-Górecki <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
from qubes.qubes import QubesException
from qubes.qubesutils import parse_size
from optparse import OptionParser
import subprocess
import os
import re
import sys

def main():
    usage = "usage: %prog <vm-name> <size>"
    parser = OptionParser (usage)

    parser.add_option("--allow-start", action="store_true",
                      dest="allow_start", default=False,
                      help="Allow VM to be started to complete the operation")

    (options, args) = parser.parse_args ()
    if (len (args) != 2):
        parser.error ("You must specify VM name and new size!")
    vmname = args[0]
    size = args[1]

    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)

    size_bytes = parse_size(size)

    if not hasattr(vm, 'resize_root_img'):
        print >> sys.stderr, "Operation not supported for this VM type"
        exit(1)

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

    exit (0)


main()