trace: avoid SystemTap dtrace(1) warnings on empty files

[mirror_qemu.git] / scripts / qmp / qom-tree

#!/usr/bin/python
##
# QEMU Object Model test tools
#
# Copyright IBM, Corp. 2011
# Copyright (c) 2013 SUSE LINUX Products GmbH
#
# Authors:
#  Anthony Liguori   <aliguori@amazon.com>
#  Andreas Faerber   <afaerber@suse.de>
#
# This work is licensed under the terms of the GNU GPL, version 2 or later.  See
# the COPYING file in the top-level directory.
##

from __future__ import print_function
import sys
import os
from qmp import QEMUMonitorProtocol

cmd, args = sys.argv[0], sys.argv[1:]
socket_path = None
path = None
prop = None

def usage():
    return '''environment variables:
    QMP_SOCKET=<path | addr:port>
usage:
    %s [-h] [-s <QMP socket path | addr:port>] [<path>]
''' % cmd

def usage_error(error_msg = "unspecified error"):
    sys.stderr.write('%s\nERROR: %s\n' % (usage(), error_msg))
    exit(1)

if len(args) > 0:
    if args[0] == "-h":
        print(usage())
        exit(0);
    elif args[0] == "-s":
        try:
            socket_path = args[1]
        except:
            usage_error("missing argument: QMP socket path or address");
        args = args[2:]

if not socket_path:
    if 'QMP_SOCKET' in os.environ:
        socket_path = os.environ['QMP_SOCKET']
    else:
        usage_error("no QMP socket path or address given");

srv = QEMUMonitorProtocol(socket_path)
srv.connect()

def list_node(path):
    print('%s' % path)
    items = srv.command('qom-list', path=path)
    for item in items:
        if not item['type'].startswith('child<'):
            try:
                print('  %s: %s (%s)' % (item['name'], srv.command('qom-get', path=path, property=item['name']), item['type']))
            except:
                print('  %s: <EXCEPTION> (%s)' % (item['name'], item['type']))
    print('')
    for item in items:
        if item['type'].startswith('child<'):
            list_node((path if (path != '/') else '')  + '/' + item['name'])

if len(args) == 0:
    path = '/'
else:
    path = args[0]

list_node(path)