/usr/lib/python2.7/dist-packages/ubuntu-sso-client/ubuntu_sso/utils/runner/qt.py is in python-ubuntu-sso-client 13.10-0ubuntu6.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 | # -*- coding: utf-8 -*-
#
# Copyright 2012 Canonical Ltd.
#
# This program is free software: you can redistribute it and/or modify it
# under the terms of the GNU General Public License version 3, as published
# by the Free Software Foundation.
#
# This program is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranties of
# MERCHANTABILITY, SATISFACTORY QUALITY, 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, see <http://www.gnu.org/licenses/>.
#
# In addition, as a special exception, the copyright holders give
# permission to link the code of portions of this program with the
# OpenSSL library under certain conditions as described in each
# individual source file, and distribute linked combinations
# including the two.
# You must obey the GNU General Public License in all respects
# for all of the code used other than OpenSSL. If you modify
# file(s) with this exception, you may extend this exception to your
# version of the file(s), but you are not obligated to do so. If you
# do not wish to do so, delete this exception statement from your
# version. If you delete this exception statement from all source
# files in the program, then also delete it here.
"""Utility to spawn another program from a plain Qt mainloop."""
from PyQt4 import QtCore
from ubuntu_sso.logger import setup_logging
logger = setup_logging("ubuntu_sso.utils.runner.qt")
# pylint: disable=C0103
# the set below is a workaround to hold to object references to avoid
# garbage collection before the processes finish executing
_processes = set()
def spawn_program(args, reply_handler, error_handler):
"""Spawn the program specified by 'args' using the Qt mainloop.
When the program finishes, 'reply_handler' will be called with a single
argument that will be the porgram status code.
If there is an error, error_handler will be called with an instance of
SpawnError.
"""
process = QtCore.QProcess()
_processes.add(process)
def print_pid():
"""Add a debug log message."""
pid = process.pid()
logger.debug('Spawning the program %r with the qt mainloop '
'(returned pid is %r).', args, pid)
def child_watch(status):
"""Handle child termination."""
reply_handler(status)
_processes.remove(process)
def handle_error(process_error):
"""Handle error when spawning the process."""
failed_to_start = (process_error == process.FailedToStart)
msg = 'ProcessError is %r' % process_error
error_handler(msg=msg, failed_to_start=failed_to_start)
_processes.remove(process)
process.started.connect(print_pid)
process.finished.connect(child_watch)
process.error.connect(handle_error)
args = list(args)
program = args[0]
argv = args[1:]
process.start(program, argv)
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