core-admin/qvm-tools/qvm-run

#!/usr/bin/python2
#
# The Qubes OS Project, http://www.qubes-os.org
#
# Copyright (C) 2010  Joanna Rutkowska <joanna@invisiblethingslab.com>
# Copyright (C) 2010  Rafal Wojtczuk  <rafal@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.guihelpers import notify_error_qubes_manager
from optparse import OptionParser
import subprocess
import socket
import errno
import dbus
import time
import sys
import os
import os.path

notify_object = None

# how long (in sec) to wait for VMs to shutdown
# before killing them (when used with --wait option)
from qubes.qubes import defaults

def tray_notify(str, label, timeout = 3000):
    if notify_object:
        notify_object.Notify("Qubes", 0, label.icon, "Qubes", str, [], [], timeout, dbus_interface="org.freedesktop.Notifications")

def tray_notify_error(str, timeout = 3000):
    if notify_object:
        notify_object.Notify("Qubes", 0, "dialog-error", "Qubes", str, [], [], timeout, dbus_interface="org.freedesktop.Notifications")

def vm_run_cmd(vm, cmd, options):
    if options.shutdown:
        if options.verbose:
            print >> sys.stderr, "Shutting down VM: '{0}'...".format(vm.name)
        try:
            vm.shutdown(force=options.force)
        except (QubesException) as err:
            # "There are other VMs connected to this VM:"
            print >> sys.stderr, "ERROR: {0}".format(err)
            if str(err).startswith("There are other VMs connected"):
                print >> sys.stderr, "Shutdown them first or use --force switch"
            exit(1)
        return 0

    if options.pause:
        if options.verbose:
            print >> sys.stderr, "Pausing VM: '{0}'...".format(vm.name)
        vm.pause()
        return 0

    if options.unpause:
        if options.verbose:
            print >> sys.stderr, "UnPausing VM: '{0}'...".format(vm.name)
        vm.unpause()
        return 0

    if options.verbose:
        print >> sys.stderr, "Running command on VM: '{0}'...".format(vm.name)
    if options.passio and options.color_output:
        print "\033[0;31m",

    try:
        def tray_notify_generic(level, str):
            if level == "info":
                tray_notify(str, label=vm.label)
            elif level == "error":
                tray_notify_error(str)

        return vm.run(cmd, autostart = options.auto,
            verbose = options.verbose,
            user = options.user,
            notify_function = tray_notify_generic if options.tray else None,
            wait = options.passio, localcmd = options.localcmd,
            gui = options.gui, filter_esc = options.filter_esc)
    except QubesException as err:
        if options.passio and options.color_output:
            print "\033[0m",
        if options.tray:
            tray_notify_error(str(err))
            notify_error_qubes_manager(vm.name, str(err))
        print >> sys.stderr, "ERROR(%s): %s" % (str(vm.name), str(err))
        return 1
    finally:
        if options.passio and options.color_output:
            print "\033[0m",

def main():
    usage = "usage: %prog [options] [<vm-name>] [<cmd>]"
    parser = OptionParser (usage)
    parser.add_option ("-q", "--quiet", action="store_false", dest="verbose", default=True)
    parser.add_option ("-a", "--auto", action="store_true", dest="auto", default=False,
                       help="Auto start the VM if not running")
    parser.add_option ("-u", "--user", action="store", dest="user", default=None,
                       help="Run command in a VM as a specified user")
    parser.add_option ("--tray", action="store_true", dest="tray", default=False,
                       help="Use tray notifications instead of stdout" )

    parser.add_option ("--all", action="store_true", dest="run_on_all_running", default=False,
                      help="Run command on all currently running VMs (or all paused, in case of --unpause)")

    parser.add_option ("--exclude", action="append", dest="exclude_list",
                       help="When --all is used: exclude this VM name (may be "
                            "repeated)")

    parser.add_option ("--wait", action="store_true", dest="wait_for_shutdown", default=False,
                      help="Wait for the VM(s) to shutdown")

    parser.add_option ("--shutdown", action="store_true", dest="shutdown", default=False,
                      help="(deprecated) Do 'xl shutdown' for the VM(s) (can be combined this with --all and --wait)")

    parser.add_option ("--pause", action="store_true", dest="pause", default=False,
                      help="Do 'xl pause' for the VM(s) (can be combined this with --all and --wait)")

    parser.add_option ("--unpause", action="store_true", dest="unpause", default=False,
                      help="Do 'xl unpause' for the VM(s) (can be combined this with --all and --wait)")

    parser.add_option ("-p", "--pass-io", action="store_true", dest="passio", default=False,
                      help="Pass stdin/stdout/stderr from remote program (implies -q)")

    parser.add_option ("--localcmd", action="store", dest="localcmd", default=None,
                      help="With --pass-io, pass stdin/stdout/stderr to the given program")

    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 ("--nogui", action="store_false", dest="gui", default=True,
                      help="Run command without gui")

    parser.add_option ("--filter-escape-chars", action="store_true",
                       dest="filter_esc",
                       default=os.isatty(sys.stdout.fileno()),
                       help="Filter terminal escape sequences (default if "
                            "output is terminal)")
    parser.add_option("--no-filter-escape-chars", action="store_false",
                      dest="filter_esc",
                      help="Do not filter terminal escape sequences - "
                           "overrides --filter-escape-chars, DANGEROUS when "
                           "output is terminal")

    parser.add_option("--no-color-output", action="store_false",
                      dest="color_output", default=None,
                      help="Disable marking VM output with red color")

    (options, args) = parser.parse_args ()

    if options.passio and options.run_on_all_running:
        parser.error ("Options --all and --pass-io cannot be used together")

    if options.passio:
        options.verbose = False

    if options.color_output is None:
        options.color_output = os.isatty(sys.stdout.fileno())

    if options.shutdown:
        print >>sys.stderr, "WARNING: --shutdown is deprecated. Use qvm-shutdown instead."

    if (options.shutdown or options.pause or options.unpause):
        takes_cmd_argument = False
    else:
        takes_cmd_argument = True

    if options.run_on_all_running:
        if len(args) < 1 and takes_cmd_argument:
            parser.error ("You must provide a command to execute on all the VMs.")
        if len(args) > 1 or ((not takes_cmd_argument) and len(args) > 0):
            parser.error ("To many arguments...")
        cmdstr = args[0] if takes_cmd_argument else None
    else:
        if len (args) < 1 and not takes_cmd_argument:
            parser.error ("You must specify the VM name to shutdown/pause/unpause.")
        if len (args) < 2 and takes_cmd_argument:
            parser.error ("You must specify the VM name and the command to execute in the VM.")
        if len (args) > 2 or ((not takes_cmd_argument) and len(args) > 1):
            parser.error ("To many arguments...")
        vmname = args[0]
        cmdstr = args[1] if takes_cmd_argument else None

    if options.tray:
        global notify_object
        try:
            notify_object = dbus.SessionBus().get_object("org.freedesktop.Notifications", "/org/freedesktop/Notifications")
        except dbus.DBusException as ex:
            print >>sys.stderr, "WARNING: failed connect to tray notification service: %s" % str(ex)

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

    vms_list = []
    if options.run_on_all_running:
        all_vms = [vm for vm in qvm_collection.values()]
        for vm in all_vms:
            if options.exclude_list is not None and vm.name in options.exclude_list:
                continue
            if vm.qid == 0:
                continue
            if (options.unpause and vm.is_paused()) or (not options.unpause and  vm.is_running()):
                vms_list.append (vm)
        # disable options incompatible with --all
        options.passio = False
    else:
        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)
        vms_list.append(vm)

    retcode = 0
    for vm in vms_list:
        r = vm_run_cmd(vm, cmdstr, options)
        retcode = max(r, retcode)

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

        while len (vms_list):
            if options.verbose:
                print >> sys.stderr, "Waiting for VMs: ", [vm.name for vm in vms_list]
            for vm in vms_list:
                if not vm.is_running():
                    vms_list.remove (vm)
                if shutdown_counter > defaults["shutdown_counter_max"]:
                    # kill the VM
                    if options.verbose:
                        print >> sys.stderr, "Killing the (apparently hanging) VM '{0}'...".format(vm.name)
                    vm.force_shutdown()
                    #vms_list.remove(vm)

            shutdown_counter += 1
            time.sleep (1)
        exit (0) # there is no point in executing the other daemons in the case of --wait
    exit(retcode)

main()