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364 lines
13 KiB
Python
364 lines
13 KiB
Python
#!/usr/bin/env python3
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# -*- coding: utf-8 -*-
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# Copyright (c) 2009, Giampaolo Rodola'. All rights reserved.
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# Use of this source code is governed by a BSD-style license that can be
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# found in the LICENSE file.
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"""
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Notes about unicode handling in psutil
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======================================
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Starting from version 5.3.0 psutil adds unicode support, see:
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https://github.com/giampaolo/psutil/issues/1040
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The notes below apply to *any* API returning a string such as
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process exe(), cwd() or username():
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* all strings are encoded by using the OS filesystem encoding
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(sys.getfilesystemencoding()) which varies depending on the platform
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(e.g. "UTF-8" on macOS, "mbcs" on Win)
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* no API call is supposed to crash with UnicodeDecodeError
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* instead, in case of badly encoded data returned by the OS, the
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following error handlers are used to replace the corrupted characters in
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the string:
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* Python 3: sys.getfilesystemencodeerrors() (PY 3.6+) or
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"surrogatescape" on POSIX and "replace" on Windows
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* Python 2: "replace"
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* on Python 2 all APIs return bytes (str type), never unicode
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* on Python 2, you can go back to unicode by doing:
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>>> unicode(p.exe(), sys.getdefaultencoding(), errors="replace")
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For a detailed explanation of how psutil handles unicode see #1040.
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Tests
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=====
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List of APIs returning or dealing with a string:
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('not tested' means they are not tested to deal with non-ASCII strings):
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* Process.cmdline()
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* Process.connections('unix')
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* Process.cwd()
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* Process.environ()
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* Process.exe()
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* Process.memory_maps()
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* Process.name()
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* Process.open_files()
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* Process.username() (not tested)
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* disk_io_counters() (not tested)
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* disk_partitions() (not tested)
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* disk_usage(str)
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* net_connections('unix')
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* net_if_addrs() (not tested)
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* net_if_stats() (not tested)
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* net_io_counters() (not tested)
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* sensors_fans() (not tested)
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* sensors_temperatures() (not tested)
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* users() (not tested)
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* WindowsService.binpath() (not tested)
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* WindowsService.description() (not tested)
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* WindowsService.display_name() (not tested)
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* WindowsService.name() (not tested)
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* WindowsService.status() (not tested)
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* WindowsService.username() (not tested)
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In here we create a unicode path with a funky non-ASCII name and (where
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possible) make psutil return it back (e.g. on name(), exe(), open_files(),
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etc.) and make sure that:
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* psutil never crashes with UnicodeDecodeError
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* the returned path matches
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"""
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import os
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import shutil
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import traceback
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import warnings
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from contextlib import closing
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from psutil import BSD
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from psutil import OPENBSD
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from psutil import POSIX
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from psutil import WINDOWS
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from psutil._compat import PY3
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from psutil._compat import u
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from psutil.tests import APPVEYOR
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from psutil.tests import ASCII_FS
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from psutil.tests import bind_unix_socket
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from psutil.tests import chdir
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from psutil.tests import CI_TESTING
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from psutil.tests import CIRRUS
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from psutil.tests import copyload_shared_lib
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from psutil.tests import create_exe
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from psutil.tests import get_testfn
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from psutil.tests import HAS_CONNECTIONS_UNIX
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from psutil.tests import HAS_ENVIRON
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from psutil.tests import HAS_MEMORY_MAPS
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from psutil.tests import INVALID_UNICODE_SUFFIX
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from psutil.tests import PsutilTestCase
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from psutil.tests import PYPY
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from psutil.tests import safe_mkdir
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from psutil.tests import safe_rmpath
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from psutil.tests import serialrun
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from psutil.tests import skip_on_access_denied
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from psutil.tests import spawn_testproc
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from psutil.tests import terminate
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from psutil.tests import TESTFN_PREFIX
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from psutil.tests import UNICODE_SUFFIX
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from psutil.tests import unittest
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import psutil
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if APPVEYOR:
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def safe_rmpath(path): # NOQA
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# TODO - this is quite random and I'm not sure why it happens,
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# nor I can reproduce it locally:
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# https://ci.appveyor.com/project/giampaolo/psutil/build/job/
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# jiq2cgd6stsbtn60
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# safe_rmpath() happens after reap_children() so this is weird
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# Perhaps wait_procs() on Windows is broken? Maybe because
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# of STILL_ACTIVE?
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# https://github.com/giampaolo/psutil/blob/
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# 68c7a70728a31d8b8b58f4be6c4c0baa2f449eda/psutil/arch/
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# windows/process_info.c#L146
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from psutil.tests import safe_rmpath as _rm
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try:
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return _rm(path)
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except WindowsError:
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traceback.print_exc()
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def try_unicode(suffix):
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"""Return True if both the fs and the subprocess module can
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deal with a unicode file name.
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"""
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if PY3:
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return True
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sproc = None
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testfn = get_testfn(suffix=suffix)
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try:
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safe_rmpath(testfn)
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create_exe(testfn)
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sproc = spawn_testproc(cmd=[testfn])
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shutil.copyfile(testfn, testfn + '-2')
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safe_rmpath(testfn + '-2')
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except (UnicodeEncodeError, IOError):
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return False
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else:
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return True
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finally:
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if sproc is not None:
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terminate(sproc)
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safe_rmpath(testfn)
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# ===================================================================
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# FS APIs
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# ===================================================================
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@serialrun
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@unittest.skipIf(ASCII_FS, "ASCII fs")
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@unittest.skipIf(PYPY and not PY3, "too much trouble on PYPY2")
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class _BaseFSAPIsTests(object):
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funky_suffix = None
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@classmethod
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def setUpClass(cls):
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cls.funky_name = get_testfn(suffix=cls.funky_suffix)
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create_exe(cls.funky_name)
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@classmethod
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def tearDownClass(cls):
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safe_rmpath(cls.funky_name)
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def expect_exact_path_match(self):
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raise NotImplementedError("must be implemented in subclass")
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# ---
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def test_proc_exe(self):
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subp = self.spawn_testproc(cmd=[self.funky_name])
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p = psutil.Process(subp.pid)
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exe = p.exe()
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self.assertIsInstance(exe, str)
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if self.expect_exact_path_match():
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self.assertEqual(os.path.normcase(exe),
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os.path.normcase(self.funky_name))
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def test_proc_name(self):
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subp = self.spawn_testproc(cmd=[self.funky_name])
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name = psutil.Process(subp.pid).name()
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self.assertIsInstance(name, str)
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if self.expect_exact_path_match():
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self.assertEqual(name, os.path.basename(self.funky_name))
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def test_proc_cmdline(self):
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subp = self.spawn_testproc(cmd=[self.funky_name])
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p = psutil.Process(subp.pid)
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cmdline = p.cmdline()
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for part in cmdline:
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self.assertIsInstance(part, str)
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if self.expect_exact_path_match():
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self.assertEqual(cmdline, [self.funky_name])
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def test_proc_cwd(self):
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dname = self.funky_name + "2"
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self.addCleanup(safe_rmpath, dname)
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safe_mkdir(dname)
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with chdir(dname):
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p = psutil.Process()
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cwd = p.cwd()
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self.assertIsInstance(p.cwd(), str)
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if self.expect_exact_path_match():
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self.assertEqual(cwd, dname)
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@unittest.skipIf(PYPY and WINDOWS, "fails on PYPY + WINDOWS")
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def test_proc_open_files(self):
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p = psutil.Process()
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start = set(p.open_files())
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with open(self.funky_name, 'rb'):
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new = set(p.open_files())
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path = (new - start).pop().path
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self.assertIsInstance(path, str)
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if BSD and not path:
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# XXX - see https://github.com/giampaolo/psutil/issues/595
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return self.skipTest("open_files on BSD is broken")
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if self.expect_exact_path_match():
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self.assertEqual(os.path.normcase(path),
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os.path.normcase(self.funky_name))
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@unittest.skipIf(not POSIX, "POSIX only")
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def test_proc_connections(self):
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name = self.get_testfn(suffix=self.funky_suffix)
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try:
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sock = bind_unix_socket(name)
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except UnicodeEncodeError:
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if PY3:
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raise
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else:
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raise unittest.SkipTest("not supported")
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with closing(sock):
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conn = psutil.Process().connections('unix')[0]
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self.assertIsInstance(conn.laddr, str)
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# AF_UNIX addr not set on OpenBSD
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if not OPENBSD and not CIRRUS: # XXX
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self.assertEqual(conn.laddr, name)
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@unittest.skipIf(not POSIX, "POSIX only")
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@unittest.skipIf(not HAS_CONNECTIONS_UNIX, "can't list UNIX sockets")
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@skip_on_access_denied()
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def test_net_connections(self):
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def find_sock(cons):
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for conn in cons:
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if os.path.basename(conn.laddr).startswith(TESTFN_PREFIX):
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return conn
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raise ValueError("connection not found")
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name = self.get_testfn(suffix=self.funky_suffix)
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try:
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sock = bind_unix_socket(name)
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except UnicodeEncodeError:
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if PY3:
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raise
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else:
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raise unittest.SkipTest("not supported")
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with closing(sock):
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cons = psutil.net_connections(kind='unix')
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# AF_UNIX addr not set on OpenBSD
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if not OPENBSD:
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conn = find_sock(cons)
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self.assertIsInstance(conn.laddr, str)
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self.assertEqual(conn.laddr, name)
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def test_disk_usage(self):
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dname = self.funky_name + "2"
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self.addCleanup(safe_rmpath, dname)
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safe_mkdir(dname)
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psutil.disk_usage(dname)
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@unittest.skipIf(not HAS_MEMORY_MAPS, "not supported")
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@unittest.skipIf(not PY3, "ctypes does not support unicode on PY2")
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@unittest.skipIf(PYPY and WINDOWS,
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"copyload_shared_lib() unsupported on PYPY + WINDOWS")
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def test_memory_maps(self):
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# XXX: on Python 2, using ctypes.CDLL with a unicode path
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# opens a message box which blocks the test run.
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with copyload_shared_lib(suffix=self.funky_suffix) as funky_path:
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def normpath(p):
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return os.path.realpath(os.path.normcase(p))
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libpaths = [normpath(x.path)
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for x in psutil.Process().memory_maps()]
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# ...just to have a clearer msg in case of failure
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libpaths = [x for x in libpaths if TESTFN_PREFIX in x]
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self.assertIn(normpath(funky_path), libpaths)
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for path in libpaths:
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self.assertIsInstance(path, str)
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# https://travis-ci.org/giampaolo/psutil/jobs/440073249
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# @unittest.skipIf(PYPY and TRAVIS, "unreliable on PYPY + TRAVIS")
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# @unittest.skipIf(MACOS and TRAVIS, "unreliable on TRAVIS") # TODO
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@unittest.skipIf(not try_unicode(UNICODE_SUFFIX),
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"can't deal with unicode str")
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class TestFSAPIs(_BaseFSAPIsTests, PsutilTestCase):
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"""Test FS APIs with a funky, valid, UTF8 path name."""
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funky_suffix = UNICODE_SUFFIX
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def expect_exact_path_match(self):
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# Do not expect psutil to correctly handle unicode paths on
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# Python 2 if os.listdir() is not able either.
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here = '.' if isinstance(self.funky_name, str) else u('.')
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with warnings.catch_warnings():
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warnings.simplefilter("ignore")
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return self.funky_name in os.listdir(here)
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@unittest.skipIf(CI_TESTING, "unreliable on CI")
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@unittest.skipIf(not try_unicode(INVALID_UNICODE_SUFFIX),
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"can't deal with invalid unicode str")
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class TestFSAPIsWithInvalidPath(_BaseFSAPIsTests, PsutilTestCase):
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"""Test FS APIs with a funky, invalid path name."""
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funky_suffix = INVALID_UNICODE_SUFFIX
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@classmethod
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def expect_exact_path_match(cls):
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# Invalid unicode names are supposed to work on Python 2.
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return True
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# ===================================================================
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# Non fs APIs
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# ===================================================================
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class TestNonFSAPIS(PsutilTestCase):
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"""Unicode tests for non fs-related APIs."""
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@unittest.skipIf(not HAS_ENVIRON, "not supported")
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@unittest.skipIf(PYPY and WINDOWS, "segfaults on PYPY + WINDOWS")
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def test_proc_environ(self):
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# Note: differently from others, this test does not deal
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# with fs paths. On Python 2 subprocess module is broken as
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# it's not able to handle with non-ASCII env vars, so
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# we use "è", which is part of the extended ASCII table
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# (unicode point <= 255).
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env = os.environ.copy()
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funky_str = UNICODE_SUFFIX if PY3 else 'è'
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env['FUNNY_ARG'] = funky_str
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sproc = self.spawn_testproc(env=env)
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p = psutil.Process(sproc.pid)
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env = p.environ()
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for k, v in env.items():
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self.assertIsInstance(k, str)
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self.assertIsInstance(v, str)
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self.assertEqual(env['FUNNY_ARG'], funky_str)
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if __name__ == '__main__':
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from psutil.tests.runner import run_from_name
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run_from_name(__file__)
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