core-admin/qvm-tools/qubes-set-updates

#!/usr/bin/python2

import os
import sys
from qubes.qubes import QubesVmCollection
from qubes.qubesutils import updates_vms_toggle,updates_dom0_toggle,\
    updates_dom0_status

def usage():
    print "Usage: qubes-set-updates enable|disable|status"
    print "  Enable or disable globally checking for updates (both dom0 and VM)"
    print "  Status option checks only dom0 updates status"

def main():
    if len(sys.argv) < 2:
        usage()
        return 1
    
    action = sys.argv[1]
    if action not in ['enable', 'disable', 'status']:
        usage()
        return 1

    qvm_collection = QubesVmCollection()
    if action == 'status':
        qvm_collection.lock_db_for_reading()
    else:
        qvm_collection.lock_db_for_writing()
    qvm_collection.load()
    if action == 'enable':
        updates_dom0_toggle(qvm_collection, True)
        updates_vms_toggle(qvm_collection, True)
    elif action == 'disable':
        updates_dom0_toggle(qvm_collection, False)
        updates_vms_toggle(qvm_collection, False)
    else:
        if updates_dom0_status(qvm_collection):
            print "enabled"
        else:
            print "disabled"

    if action != 'status':
        qvm_collection.save()
    qvm_collection.unlock_db()

if __name__ == "__main__":
    main()