dom0/qvm-tools: new qubes-prefs tool for system-wide preferences (#421)
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Marek Marczykowski
parent
8689368a11
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1a35b98e16
152
dom0/qvm-tools/qubes-prefs
Executable file
152
dom0/qvm-tools/qubes-prefs
Executable file
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#!/usr/bin/python
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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) 2012 Marek Marczykowski <marmarek@invisiblethingslab.com>
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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 QubesHost
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from qubes.qubes import qubes_kernels_base_dir
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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 sys
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def handle_vm(vms, label, new_value = None):
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functions = { # label: [ getter, setter ],
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'default-netvm': [ 'get_default_netvm_vm', 'set_default_netvm_vm' ],
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'default-fw-netvm': [ 'get_default_fw_netvm_vm', 'set_default_fw_netvm_vm' ],
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'default-template': [ 'get_default_template_vm', 'set_default_template_vm' ],
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'clockvm': [ 'get_clockvm_vm', 'set_clockvm_vm' ],
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'updatevm': [ 'get_updatevm_vm', 'set_updatevm_vm' ],
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}
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assert label in functions.keys()
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if new_value:
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vm = vms.get_vm_by_name (new_value)
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if vm is None:
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print >> sys.stderr, "A VM with the name '{0}' does not exist in the system.".format(new_value)
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exit(1)
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# Additional checks
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if label in [ 'default-netvm', 'default-fw-netvm' ] and not vm.is_netvm():
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print >> sys.stderr, "VM '{0}' is not a NetVM".format(new_value)
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exit (1)
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if label in [ 'default-templatevm' ] and not vm.is_template():
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print >> sys.stderr, "VM '{0}' is not a template".format(new_value)
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exit (1)
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vms.__getattribute__(functions[label][1])(vm)
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else:
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vm = vms.__getattribute__(functions[label][0])()
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if vm is not None:
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return vm.name
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else:
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return "none"
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def handle_kernel(vms, label, new_value = None):
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if new_value is not None:
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if not os.path.exists(qubes_kernels_base_dir + '/' + new_value):
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print >> sys.stderr, "Kernel version {0} not installed.".format(new_value)
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print >> sys.stderr, "Available versions:"
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for k in os.listdir(qubes_kernels_base_dir):
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print >> sys.stderr, " -", k
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exit(1)
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vms.set_default_kernel(new_value)
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else:
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return vms.get_default_kernel()
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preferences = {
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"default-netvm": handle_vm,
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"default-fw-netvm": handle_vm,
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"default-template": handle_vm,
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"clockvm": handle_vm,
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"updatevm": handle_vm,
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"default-kernel": handle_kernel,
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}
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def do_list(vms):
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label_width = 18
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fmt="{{0:<{0}}}: {{1}}".format(label_width)
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for pref in sorted(preferences.items()):
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print fmt.format (pref[0], pref[1](vms, pref[0]))
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def main():
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usage = "usage: %prog [-l]\n"\
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"usage: %prog [-g] <property>\n"\
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"usage: %prog [-s] <property> <new-value>\n"\
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"List/set various global properties."
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parser = OptionParser (usage)
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parser.add_option ("-l", "--list", action="store_true", dest="do_list", default=False)
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parser.add_option ("-s", "--set", action="store_true", dest="do_set", default=False)
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parser.add_option ("-g", "--get", action="store_true", dest="do_get", default=False)
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(options, args) = parser.parse_args ()
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if options.do_list + options.do_set + options.do_get > 1:
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print >> sys.stderr, "You can provide only one action at once!"
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exit (1)
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# Select action based on args count:
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if not options.do_list and not options.do_get and not options.do_set:
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if (len (args) < 1):
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options.do_list = True
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elif (len (args) == 1):
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options.do_get = True
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else:
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options.do_set = True
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if options.do_set:
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qvm_collection = QubesVmCollection()
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qvm_collection.lock_db_for_writing()
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qvm_collection.load()
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else:
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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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if options.do_set:
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if len (args) < 2:
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print >> sys.stderr, "You must specify the property and the new value you wish to set..."
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print >> sys.stderr, "Available properties:"
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for p in sorted(preferences.keys()):
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print >> sys.stderr, "--> '{0}'".format(p)
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exit (1)
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pref = args[0]
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new_value = args[1]
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preferences[pref](qvm_collection, pref, new_value)
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qvm_collection.save()
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qvm_collection.unlock_db()
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elif options.do_get:
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if len (args) < 1:
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print >> sys.stderr, "You must specify the property you wish to get..."
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print >> sys.stderr, "Available properties:"
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for p in sorted(preferences.keys()):
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print >> sys.stderr, "--> '{0}'".format(p)
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exit (1)
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pref = args[0]
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print preferences[pref](qvm_collection, pref)
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else:
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# do_list
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do_list(qvm_collection)
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main()
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