f2aa0f3e2f
This script is connected directly to calling process, so any output here will disrupt qrexec service data. For example in case of qubes.OpenInVM this will be prepended to modified file while sending it back to the source VM - in case of no modification, it will override that file in the source VM...
163 lines
6.4 KiB
Python
Executable File
163 lines
6.4 KiB
Python
Executable File
#!/usr/bin/python2
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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) 2010 Rafal Wojtczuk <rafal@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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import os
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import subprocess
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import sys
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import fcntl
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import shutil
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import time
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from qubes.qubes import QubesVmCollection
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from qubes.qubes import QubesException
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from qubes.qubes import QubesDaemonPidfile
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from qubes.qubes import QubesDispVmLabels
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from qubes.notify import tray_notify,tray_notify_error,tray_notify_init
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current_savefile = '/var/run/qubes/current-savefile'
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current_dvm_conf = '/var/run/qubes/current-dvm.conf'
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current_savefile_vmdir = '/var/lib/qubes/dvmdata/vmdir'
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class QfileDaemonDvm:
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def __init__(self, name):
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self.name = name
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def get_disp_templ(self):
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vmdir = os.readlink(current_savefile_vmdir)
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return vmdir.split('/')[-1]
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def do_get_dvm(self):
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tray_notify("Starting new DispVM...", "red")
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qvm_collection = QubesVmCollection()
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qvm_collection.lock_db_for_writing()
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tar_process = subprocess.Popen(['bsdtar', '-C', current_savefile_vmdir,
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'-xSUf', os.path.join(current_savefile_vmdir, 'saved-cows.tar')])
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qvm_collection.load()
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print >>sys.stderr, "time=%s, collection loaded" % (str(time.time()))
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vm = qvm_collection.get_vm_by_name(self.name)
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if vm is None:
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sys.stderr.write( 'Domain ' + self.name + ' does not exist ?')
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qvm_collection.unlock_db()
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return None
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label = vm.label
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if len(sys.argv) > 4 and len(sys.argv[4]) > 0:
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assert sys.argv[4] in QubesDispVmLabels.keys(), "Invalid label"
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label = QubesDispVmLabels[sys.argv[4]]
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disp_templ = self.get_disp_templ()
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vm_disptempl = qvm_collection.get_vm_by_name(disp_templ)
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if vm_disptempl is None:
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sys.stderr.write( 'Domain ' + disp_templ + ' does not exist ?')
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qvm_collection.unlock_db()
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return None
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dispvm=qvm_collection.add_new_vm('QubesDisposableVm', disp_template=vm_disptempl, label=label)
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print >>sys.stderr, "time=%s, VM created" % (str(time.time()))
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# By default inherit firewall rules from calling VM
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if os.path.exists(vm.firewall_conf):
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disp_firewall_conf = '/var/run/qubes/%s-firewall.xml' % dispvm.name
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shutil.copy(vm.firewall_conf, disp_firewall_conf)
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dispvm.firewall_conf = disp_firewall_conf
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if len(sys.argv) > 5 and len(sys.argv[5]) > 0:
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assert os.path.exists(sys.argv[5]), "Invalid firewall.conf location"
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dispvm.firewall_conf = sys.argv[5]
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if vm.qid != 0:
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dispvm.netvm = vm.dispvm_netvm
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# Wait for tar to finish
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if tar_process.wait() != 0:
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sys.stderr.write('Failed to unpack saved-cows.tar')
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qvm_collection.unlock_db()
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return None
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print >>sys.stderr, "time=%s, VM starting" % (str(time.time()))
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dispvm.start()
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print >>sys.stderr, "time=%s, VM started" % (str(time.time()))
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qvm_collection.save()
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qvm_collection.unlock_db()
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# Reload firewall rules
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print >>sys.stderr, "time=%s, reloading firewall" % (str(time.time()))
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for vm in qvm_collection.values():
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if vm.is_proxyvm() and vm.is_running():
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vm.write_iptables_qubesdb_entry()
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return dispvm
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def dvm_setup_ok(self):
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dvmdata_dir = '/var/lib/qubes/dvmdata/'
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if not os.path.isfile(current_savefile):
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return False
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if not os.path.isfile(dvmdata_dir+'default-savefile') or not os.path.isfile(dvmdata_dir+'savefile-root'):
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return False
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dvm_mtime = os.stat(current_savefile).st_mtime
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root_mtime = os.stat(dvmdata_dir+'savefile-root').st_mtime
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if dvm_mtime < root_mtime:
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template_name = os.path.basename(os.path.dirname(os.readlink(dvmdata_dir+'savefile-root')))
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if subprocess.call(["xl", "domid", template_name],
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stdout=open(os.devnull, "w")) == 0:
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tray_notify("For optimum performance, you should not "
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"start DispVM when its template is running.", "red")
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return False
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return True
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def get_dvm(self):
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if not self.dvm_setup_ok():
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if os.system("/usr/lib/qubes/qubes-update-dispvm-savefile-with-progress.sh >/dev/null </dev/null" ) != 0:
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tray_notify_error("DVM savefile creation failed")
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return None
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return self.do_get_dvm()
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def remove_disposable_from_qdb(self, name):
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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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vm = qvm_collection.get_vm_by_name(name)
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if vm is None:
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qvm_collection.unlock_db()
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return False
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qvm_collection.pop(vm.qid)
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qvm_collection.save()
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qvm_collection.unlock_db()
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def main():
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global notify_object
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exec_index = sys.argv[1]
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src_vmname = sys.argv[2]
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user = sys.argv[3]
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#accessed directly by get_dvm()
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# sys.argv[4] - override label
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# sys.argv[5] - override firewall
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print >>sys.stderr, "time=%s, qfile-daemon-dvm init" % (str(time.time()))
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tray_notify_init()
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print >>sys.stderr, "time=%s, creating DispVM" % (str(time.time()))
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qfile = QfileDaemonDvm(src_vmname)
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dispvm = qfile.get_dvm()
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if dispvm is not None:
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print >>sys.stderr, "time=%s, starting VM process" % (str(time.time()))
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subprocess.call(['/usr/lib/qubes/qrexec-client', '-d', dispvm.name,
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user+':exec /usr/lib/qubes/qubes-rpc-multiplexer ' + exec_index + " " + src_vmname])
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dispvm.force_shutdown()
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qfile.remove_disposable_from_qdb(dispvm.name)
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main()
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