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321 lines
10 KiB
Python
321 lines
10 KiB
Python
#!/usr/bin/env python3
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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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"""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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* sys.getfilesystemencodeerrors() or "surrogatescape" on POSIX and
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"replace" on Windows.
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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.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.net_connections('unix')
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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 warnings
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from contextlib import closing
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import psutil
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from psutil import BSD
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from psutil import MACOS
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from psutil import NETBSD
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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.tests import ASCII_FS
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from psutil.tests import CI_TESTING
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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 HAS_NET_CONNECTIONS_UNIX
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from psutil.tests import INVALID_UNICODE_SUFFIX
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from psutil.tests import PYPY
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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 PsutilTestCase
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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 copyload_shared_lib
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from psutil.tests import create_py_exe
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from psutil.tests import get_testfn
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from psutil.tests import pytest
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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 skip_on_access_denied
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from psutil.tests import spawn_subproc
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from psutil.tests import terminate
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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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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_py_exe(testfn)
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sproc = spawn_subproc(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, OSError):
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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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class BaseUnicodeTest(PsutilTestCase):
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funky_suffix = None
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@classmethod
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def setUpClass(cls):
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super().setUpClass()
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cls.skip_tests = False
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cls.funky_name = None
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if cls.funky_suffix is not None:
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if not try_unicode(cls.funky_suffix):
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cls.skip_tests = True
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else:
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cls.funky_name = get_testfn(suffix=cls.funky_suffix)
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create_py_exe(cls.funky_name)
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def setUp(self):
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super().setUp()
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if self.skip_tests:
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raise pytest.skip("can't handle unicode str")
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@pytest.mark.xdist_group(name="serial")
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@pytest.mark.skipif(ASCII_FS, reason="ASCII fs")
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class TestFSAPIs(BaseUnicodeTest):
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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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with warnings.catch_warnings():
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warnings.simplefilter("ignore")
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return self.funky_name in os.listdir(".")
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# ---
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def test_proc_exe(self):
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cmd = [
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self.funky_name,
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"-c",
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"import time; [time.sleep(0.1) for x in range(100)]",
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]
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subp = self.spawn_subproc(cmd)
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p = psutil.Process(subp.pid)
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exe = p.exe()
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assert isinstance(exe, str)
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if self.expect_exact_path_match():
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assert os.path.normcase(exe) == os.path.normcase(self.funky_name)
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def test_proc_name(self):
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cmd = [
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self.funky_name,
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"-c",
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"import time; [time.sleep(0.1) for x in range(100)]",
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]
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subp = self.spawn_subproc(cmd)
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name = psutil.Process(subp.pid).name()
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assert isinstance(name, str)
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if self.expect_exact_path_match():
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assert name == os.path.basename(self.funky_name)
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def test_proc_cmdline(self):
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cmd = [
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self.funky_name,
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"-c",
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"import time; [time.sleep(0.1) for x in range(100)]",
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]
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subp = self.spawn_subproc(cmd)
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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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assert isinstance(part, str)
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if self.expect_exact_path_match():
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assert cmdline == cmd
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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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assert isinstance(p.cwd(), str)
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if self.expect_exact_path_match():
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assert cwd == dname
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@pytest.mark.skipif(PYPY and WINDOWS, reason="fails on PYPY + WINDOWS")
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@pytest.mark.skipif(
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NETBSD or OPENBSD, reason="broken on NETBSD or OPENBSD"
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)
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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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assert isinstance(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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raise pytest.skip("open_files on BSD is broken")
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if self.expect_exact_path_match():
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assert os.path.normcase(path) == os.path.normcase(self.funky_name)
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@pytest.mark.skipif(not POSIX, reason="POSIX only")
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def test_proc_net_connections(self):
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name = self.get_testfn(suffix=self.funky_suffix)
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sock = bind_unix_socket(name)
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with closing(sock):
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conn = psutil.Process().net_connections('unix')[0]
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assert isinstance(conn.laddr, str)
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if not conn.laddr and MACOS and CI_TESTING:
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raise pytest.skip("unreliable on OSX")
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assert conn.laddr == name
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@pytest.mark.skipif(not POSIX, reason="POSIX only")
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@pytest.mark.skipif(
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not HAS_NET_CONNECTIONS_UNIX, reason="can't list UNIX sockets"
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)
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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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sock = bind_unix_socket(name)
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with closing(sock):
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cons = psutil.net_connections(kind='unix')
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conn = find_sock(cons)
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assert isinstance(conn.laddr, str)
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assert 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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@pytest.mark.skipif(not HAS_MEMORY_MAPS, reason="not supported")
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def test_memory_maps(self):
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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 = [
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normpath(x.path) for x in psutil.Process().memory_maps()
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]
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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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assert normpath(funky_path) in libpaths
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for path in libpaths:
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assert isinstance(path, str)
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@pytest.mark.skipif(CI_TESTING, reason="unreliable on CI")
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class TestFSAPIsWithInvalidPath(TestFSAPIs):
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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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def expect_exact_path_match(self):
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return not MACOS
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# ===================================================================
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# Non fs APIs
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# ===================================================================
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class TestNonFSAPIS(BaseUnicodeTest):
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"""Unicode tests for non fs-related APIs."""
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funky_suffix = UNICODE_SUFFIX
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@pytest.mark.skipif(not HAS_ENVIRON, reason="not supported")
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@pytest.mark.skipif(PYPY and WINDOWS, reason="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.
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env = os.environ.copy()
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env['FUNNY_ARG'] = self.funky_suffix
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sproc = self.spawn_subproc(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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assert isinstance(k, str)
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assert isinstance(v, str)
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assert env['FUNNY_ARG'] == self.funky_suffix
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