110 lines
3.3 KiB
Python
Executable File
110 lines
3.3 KiB
Python
Executable File
#!/usr/bin/python2.6
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#
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# The Qubes OS Project, http://www.qubes-os.org
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#
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# Copyright (C) 2011 Marek Marczykowski <marmarek@mimuw.edu.pl>
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#
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# This program is free software; you can redistribute it and/or
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# modify it under the terms of the GNU General Public License
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# as published by the Free Software Foundation; either version 2
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# of the License, or (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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#
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#
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from qubes.qubes import QubesVmCollection
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from qubes.qubes import QubesException
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from optparse import OptionParser
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import subprocess
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import os
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import re
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qvm_run_path = "/usr/bin/qvm-run"
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def parse_size(size):
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units = [ ('K', 1024), ('KB', 1024),
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('M', 1024*1024), ('MB', 1024*1024),
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('G', 1024*1024*1024), ('GB', 1024*1024*1024),
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]
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size = size.strip().upper()
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if size.isdigit():
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return size
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for unit, multiplier in units:
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if size.endswith(unit):
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size = size[:-len(unit)].strip()
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return int(size)*multiplier
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print "Invalid size: {0}.".format(size)
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exit(1)
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def main():
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usage = "usage: %prog <vm-name> <size>"
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parser = OptionParser (usage)
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(options, args) = parser.parse_args ()
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if (len (args) != 2):
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parser.error ("You must specify VM name and new size!")
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vmname = args[0]
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size = args[1]
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qvm_collection = QubesVmCollection()
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qvm_collection.lock_db_for_reading()
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qvm_collection.load()
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qvm_collection.unlock_db()
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vm = qvm_collection.get_vm_by_name(vmname)
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if vm is None:
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print "A VM with the name '{0}' does not exist in the system.".format(vmname)
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exit(1)
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if vm.is_running() and os.geteuid() != 0:
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print "You must be root to grow private.img on running VM."
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exit(1)
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size_bytes = parse_size(size)
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if size_bytes < vm.get_private_img_sz():
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print "Cannot shrink private.img ({0} < {1})".format(size_bytes, vm.get_private_img_sz())
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exit(1)
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try:
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vm.resize_private_img(size_bytes)
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except (IOError, OSError, QubesException) as err:
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print "ERROR: {0}".format(err)
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exit (1)
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if vm.is_running():
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# find loop device
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p = subprocess.Popen (["losetup", "--associated", vm.private_img],
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stdout=subprocess.PIPE)
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result = p.communicate()
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m = re.match(r"^(/dev/loop\d+):\s", result[0])
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if m is None:
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print "ERROR: Cannot find loop device!"
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exit(1)
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loop_dev = m.group(1)
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# resize loop device
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retcode = subprocess.check_call(["losetup", "--set-capacity", loop_dev])
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retcode = subprocess.check_call([qvm_run_path, "-uroot", vmname,
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"while [ \"`blockdev --getsize64 /dev/xvdb`\" -lt {0} ]; do sleep 0.2; done; resize2fs /dev/xvdb".format(size_bytes) ])
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else:
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retcode = subprocess.check_call(["resize2fs", "-f", vm.private_img])
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exit (0)
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main()
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