/usr/lib/python2.7/dist-packages/ubuntu-kylin-sso-client/ubuntu_kylin_sso/utils/runner/tx.py is in python-ubuntu-kylin-sso-client 0.1.2.5.
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 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 | # -*- 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 mainloop."""
import os
import sys
from twisted.internet import utils
from ubuntu_kylin_sso.logger import setup_logging
from ubuntu_kylin_sso.utils import compat
logger = setup_logging("ubuntu_kylin_sso.utils.runner.tx")
NO_SUCH_FILE_OR_DIR = 'OSError: [Errno 2]'
EXE_EXT = ''
if sys.platform == 'win32':
EXE_EXT = '.exe'
def spawn_program(args, reply_handler, error_handler):
"""Spawn the program specified by 'args' using the twisted reactor.
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.
"""
def child_watch(args):
"""Handle child termination."""
stdout, stderr, exit_code = args
if stdout:
logger.debug('Returned stdout is (exit code was %r): %r',
exit_code, stdout)
if stderr:
logger.warning('Returned stderr is (exit code was %r): %r',
exit_code, stderr)
if OSError.__name__ in stderr:
failed_to_start = NO_SUCH_FILE_OR_DIR in stderr
error_handler(msg=stderr, failed_to_start=failed_to_start)
else:
reply_handler(exit_code)
def handle_error(failure):
"""Handle error when spawning the process."""
error_handler(msg=failure.getErrorMessage())
args = list(args)
program = args[0]
argv = args[1:]
bytes_args = []
for arg in argv:
if isinstance(arg, compat.text_type):
arg = arg.encode('utf-8')
if not isinstance(arg, compat.basestring):
arg = compat.binary_type(arg)
bytes_args.append(arg)
if program and not os.access(program, os.X_OK):
# handle searching the executable in the PATH, since
# twisted will not solve that for us :-/
paths = os.environ['PATH'].split(os.pathsep)
for path in paths:
target = os.path.join(path, program)
if not target.endswith(EXE_EXT):
target += EXE_EXT
if os.access(target, os.X_OK):
program = target
break
try:
d = utils.getProcessOutputAndValue(program, bytes_args, env=os.environ)
except OSError as e:
error_handler(msg=e, failed_to_start=True)
except Exception as e:
error_handler(msg=e, failed_to_start=False)
else:
logger.debug('Spawning the program %r with the twisted reactor '
'(returned deferred is %r).', repr(args), d)
d.addCallback(child_watch)
d.addErrback(handle_error)
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