-
-
Notifications
You must be signed in to change notification settings - Fork 1.4k
/
__init__.py
1138 lines (990 loc) · 34.4 KB
/
__init__.py
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
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
# -*- coding: utf-8 -*-
# Copyright (c) 2009, Giampaolo Rodola'. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
"""
Test utilities.
"""
from __future__ import print_function
import atexit
import contextlib
import ctypes
import errno
import functools
import os
import random
import re
import select
import shutil
import socket
import stat
import subprocess
import sys
import tempfile
import textwrap
import threading
import time
import traceback
import warnings
from socket import AF_INET
from socket import AF_INET6
from socket import SOCK_STREAM
import psutil
from psutil import AIX
from psutil import MACOS
from psutil import POSIX
from psutil import SUNOS
from psutil import WINDOWS
from psutil._common import supports_ipv6
from psutil._compat import ChildProcessError
from psutil._compat import FileExistsError
from psutil._compat import FileNotFoundError
from psutil._compat import PY3
from psutil._compat import u
from psutil._compat import unicode
from psutil._compat import which
if sys.version_info < (2, 7):
import unittest2 as unittest # requires "pip install unittest2"
else:
import unittest
try:
from unittest import mock # py3
except ImportError:
with warnings.catch_warnings():
warnings.simplefilter("ignore")
import mock # NOQA - requires "pip install mock"
if sys.version_info >= (3, 4):
import enum
else:
enum = None
__all__ = [
# constants
'APPVEYOR', 'DEVNULL', 'GLOBAL_TIMEOUT', 'MEMORY_TOLERANCE', 'NO_RETRIES',
'PYPY', 'PYTHON_EXE', 'ROOT_DIR', 'SCRIPTS_DIR', 'TESTFILE_PREFIX',
'TESTFN', 'TESTFN_UNICODE', 'TOX', 'TRAVIS', 'CIRRUS', 'CI_TESTING',
'VALID_PROC_STATUSES',
"HAS_CPU_AFFINITY", "HAS_CPU_FREQ", "HAS_ENVIRON", "HAS_PROC_IO_COUNTERS",
"HAS_IONICE", "HAS_MEMORY_MAPS", "HAS_PROC_CPU_NUM", "HAS_RLIMIT",
"HAS_SENSORS_BATTERY", "HAS_BATTERY", "HAS_SENSORS_FANS",
"HAS_SENSORS_TEMPERATURES", "HAS_MEMORY_FULL_INFO",
# subprocesses
'pyrun', 'reap_children', 'get_test_subprocess', 'create_zombie_proc',
'create_proc_children_pair',
# threads
'ThreadTask'
# test utils
'unittest', 'skip_on_access_denied', 'skip_on_not_implemented',
'retry_on_failure',
# install utils
'install_pip', 'install_test_deps',
# fs utils
'chdir', 'safe_rmpath', 'create_exe', 'decode_path', 'encode_path',
'unique_filename',
# os
'get_winver', 'get_kernel_version',
# sync primitives
'call_until', 'wait_for_pid', 'wait_for_file',
# network
'check_net_address',
'get_free_port', 'unix_socket_path', 'bind_socket', 'bind_unix_socket',
'tcp_socketpair', 'unix_socketpair', 'create_sockets',
# compat
'reload_module', 'import_module_by_path',
# others
'warn', 'copyload_shared_lib', 'is_namedtuple',
]
# ===================================================================
# --- constants
# ===================================================================
# --- platforms
TOX = os.getenv('TOX') or '' in ('1', 'true')
PYPY = '__pypy__' in sys.builtin_module_names
# whether we're running this test suite on a Continuous Integration service
TRAVIS = bool(os.environ.get('TRAVIS'))
APPVEYOR = bool(os.environ.get('APPVEYOR'))
CIRRUS = bool(os.environ.get('CIRRUS'))
CI_TESTING = TRAVIS or APPVEYOR or CIRRUS
# --- configurable defaults
# how many times retry_on_failure() decorator will retry
NO_RETRIES = 10
# bytes tolerance for system-wide memory related tests
MEMORY_TOLERANCE = 500 * 1024 # 500KB
# the timeout used in functions which have to wait
GLOBAL_TIMEOUT = 5
# be more tolerant if we're on travis / appveyor in order to avoid
# false positives
if TRAVIS or APPVEYOR:
NO_RETRIES *= 3
GLOBAL_TIMEOUT *= 3
# --- files
TESTFILE_PREFIX = '$testfn'
if os.name == 'java':
# Jython disallows @ in module names
TESTFILE_PREFIX = '$psutil-test-'
else:
TESTFILE_PREFIX = '@psutil-test-'
TESTFN = os.path.join(os.path.realpath(os.getcwd()), TESTFILE_PREFIX)
# Disambiguate TESTFN for parallel testing, while letting it remain a valid
# module name.
TESTFN = TESTFN + str(os.getpid())
_TESTFN = TESTFN + '-internal'
TESTFN_UNICODE = TESTFN + u("-ƒőő")
ASCII_FS = sys.getfilesystemencoding().lower() in ('ascii', 'us-ascii')
# --- paths
ROOT_DIR = os.path.realpath(
os.path.join(os.path.dirname(__file__), '..', '..'))
SCRIPTS_DIR = os.path.join(ROOT_DIR, 'scripts')
HERE = os.path.realpath(os.path.dirname(__file__))
# --- support
HAS_CONNECTIONS_UNIX = POSIX and not SUNOS
HAS_CPU_AFFINITY = hasattr(psutil.Process, "cpu_affinity")
HAS_CPU_FREQ = hasattr(psutil, "cpu_freq")
HAS_GETLOADAVG = hasattr(psutil, "getloadavg")
HAS_ENVIRON = hasattr(psutil.Process, "environ")
HAS_IONICE = hasattr(psutil.Process, "ionice")
HAS_MEMORY_MAPS = hasattr(psutil.Process, "memory_maps")
HAS_NET_IO_COUNTERS = hasattr(psutil, "net_io_counters")
HAS_PROC_CPU_NUM = hasattr(psutil.Process, "cpu_num")
HAS_PROC_IO_COUNTERS = hasattr(psutil.Process, "io_counters")
HAS_RLIMIT = hasattr(psutil.Process, "rlimit")
HAS_SENSORS_BATTERY = hasattr(psutil, "sensors_battery")
HAS_DISK_SWAPS = hasattr(psutil, "disk_swaps")
try:
HAS_BATTERY = HAS_SENSORS_BATTERY and bool(psutil.sensors_battery())
except Exception:
HAS_BATTERY = True
HAS_SENSORS_FANS = hasattr(psutil, "sensors_fans")
HAS_SENSORS_TEMPERATURES = hasattr(psutil, "sensors_temperatures")
HAS_THREADS = hasattr(psutil.Process, "threads")
SKIP_SYSCONS = (MACOS or AIX) and os.getuid() != 0
# --- misc
def _get_py_exe():
def attempt(exe):
try:
subprocess.check_call(
[exe, "-V"], stdout=subprocess.PIPE, stderr=subprocess.PIPE)
except Exception:
return None
else:
return exe
if MACOS:
exe = \
attempt(sys.executable) or \
attempt(os.path.realpath(sys.executable)) or \
attempt(which("python%s.%s" % sys.version_info[:2])) or \
attempt(psutil.Process().exe())
if not exe:
raise ValueError("can't find python exe real abspath")
return exe
else:
exe = os.path.realpath(sys.executable)
assert os.path.exists(exe), exe
return exe
PYTHON_EXE = _get_py_exe()
DEVNULL = open(os.devnull, 'r+')
VALID_PROC_STATUSES = [getattr(psutil, x) for x in dir(psutil)
if x.startswith('STATUS_')]
AF_UNIX = getattr(socket, "AF_UNIX", object())
_subprocesses_started = set()
_pids_started = set()
_testfiles_created = set()
@atexit.register
def cleanup_test_files():
DEVNULL.close()
for name in os.listdir(u('.')):
if isinstance(name, unicode):
prefix = u(TESTFILE_PREFIX)
else:
prefix = TESTFILE_PREFIX
if name.startswith(prefix):
try:
safe_rmpath(name)
except Exception:
traceback.print_exc()
for path in _testfiles_created:
try:
safe_rmpath(path)
except Exception:
traceback.print_exc()
# this is executed first
@atexit.register
def cleanup_test_procs():
reap_children(recursive=True)
# ===================================================================
# --- threads
# ===================================================================
class ThreadTask(threading.Thread):
"""A thread task which does nothing expect staying alive."""
def __init__(self):
threading.Thread.__init__(self)
self._running = False
self._interval = 0.001
self._flag = threading.Event()
def __repr__(self):
name = self.__class__.__name__
return '<%s running=%s at %#x>' % (name, self._running, id(self))
def __enter__(self):
self.start()
return self
def __exit__(self, *args, **kwargs):
self.stop()
def start(self):
"""Start thread and keep it running until an explicit
stop() request. Polls for shutdown every 'timeout' seconds.
"""
if self._running:
raise ValueError("already started")
threading.Thread.start(self)
self._flag.wait()
def run(self):
self._running = True
self._flag.set()
while self._running:
time.sleep(self._interval)
def stop(self):
"""Stop thread execution and and waits until it is stopped."""
if not self._running:
raise ValueError("already stopped")
self._running = False
self.join()
# ===================================================================
# --- subprocesses
# ===================================================================
def _reap_children_on_err(fun):
@functools.wraps(fun)
def wrapper(*args, **kwargs):
try:
return fun(*args, **kwargs)
except Exception:
reap_children()
raise
return wrapper
@_reap_children_on_err
def get_test_subprocess(cmd=None, **kwds):
"""Creates a python subprocess which does nothing for 60 secs and
return it as subprocess.Popen instance.
If "cmd" is specified that is used instead of python.
By default stdin and stdout are redirected to /dev/null.
It also attemps to make sure the process is in a reasonably
initialized state.
The process is registered for cleanup on reap_children().
"""
kwds.setdefault("stdin", DEVNULL)
kwds.setdefault("stdout", DEVNULL)
kwds.setdefault("cwd", os.getcwd())
kwds.setdefault("env", os.environ)
if WINDOWS:
# Prevents the subprocess to open error dialogs. This will also
# cause stderr to be suppressed, which is suboptimal in order
# to debug broken tests.
CREATE_NO_WINDOW = 0x8000000
kwds.setdefault("creationflags", CREATE_NO_WINDOW)
if cmd is None:
safe_rmpath(_TESTFN)
pyline = "from time import sleep;" \
"open(r'%s', 'w').close();" \
"sleep(60);" % _TESTFN
cmd = [PYTHON_EXE, "-c", pyline]
sproc = subprocess.Popen(cmd, **kwds)
_subprocesses_started.add(sproc)
wait_for_file(_TESTFN, delete=True, empty=True)
else:
sproc = subprocess.Popen(cmd, **kwds)
_subprocesses_started.add(sproc)
wait_for_pid(sproc.pid)
return sproc
@_reap_children_on_err
def create_proc_children_pair():
"""Create a subprocess which creates another one as in:
A (us) -> B (child) -> C (grandchild).
Return a (child, grandchild) tuple.
The 2 processes are fully initialized and will live for 60 secs
and are registered for cleanup on reap_children().
"""
_TESTFN2 = os.path.basename(_TESTFN) + '2' # need to be relative
s = textwrap.dedent("""\
import subprocess, os, sys, time
s = "import os, time;"
s += "f = open('%s', 'w');"
s += "f.write(str(os.getpid()));"
s += "f.close();"
s += "time.sleep(60);"
p = subprocess.Popen([r'%s', '-c', s])
p.wait()
""" % (_TESTFN2, PYTHON_EXE))
# On Windows if we create a subprocess with CREATE_NO_WINDOW flag
# set (which is the default) a "conhost.exe" extra process will be
# spawned as a child. We don't want that.
if WINDOWS:
subp = pyrun(s, creationflags=0)
else:
subp = pyrun(s)
child1 = psutil.Process(subp.pid)
data = wait_for_file(_TESTFN2, delete=False, empty=False)
safe_rmpath(_TESTFN2)
child2_pid = int(data)
_pids_started.add(child2_pid)
child2 = psutil.Process(child2_pid)
return (child1, child2)
def create_zombie_proc():
"""Create a zombie process and return its PID."""
assert psutil.POSIX
unix_file = tempfile.mktemp(prefix=TESTFILE_PREFIX) if MACOS else TESTFN
src = textwrap.dedent("""\
import os, sys, time, socket, contextlib
child_pid = os.fork()
if child_pid > 0:
time.sleep(3000)
else:
# this is the zombie process
s = socket.socket(socket.AF_UNIX)
with contextlib.closing(s):
s.connect('%s')
if sys.version_info < (3, ):
pid = str(os.getpid())
else:
pid = bytes(str(os.getpid()), 'ascii')
s.sendall(pid)
""" % unix_file)
with contextlib.closing(socket.socket(socket.AF_UNIX)) as sock:
sock.settimeout(GLOBAL_TIMEOUT)
sock.bind(unix_file)
sock.listen(5)
pyrun(src)
conn, _ = sock.accept()
try:
select.select([conn.fileno()], [], [], GLOBAL_TIMEOUT)
zpid = int(conn.recv(1024))
_pids_started.add(zpid)
zproc = psutil.Process(zpid)
call_until(lambda: zproc.status(), "ret == psutil.STATUS_ZOMBIE")
return zpid
finally:
conn.close()
@_reap_children_on_err
def pyrun(src, **kwds):
"""Run python 'src' code string in a separate interpreter.
Returns a subprocess.Popen instance.
"""
kwds.setdefault("stdout", None)
kwds.setdefault("stderr", None)
with tempfile.NamedTemporaryFile(
prefix=TESTFILE_PREFIX, mode="wt", delete=False) as f:
_testfiles_created.add(f.name)
f.write(src)
f.flush()
subp = get_test_subprocess([PYTHON_EXE, f.name], **kwds)
wait_for_pid(subp.pid)
return subp
@_reap_children_on_err
def sh(cmd, **kwds):
"""run cmd in a subprocess and return its output.
raises RuntimeError on error.
"""
shell = True if isinstance(cmd, (str, unicode)) else False
# Prevents subprocess to open error dialogs in case of error.
flags = 0x8000000 if WINDOWS and shell else 0
kwds.setdefault("shell", shell)
kwds.setdefault("stdout", subprocess.PIPE)
kwds.setdefault("stderr", subprocess.PIPE)
kwds.setdefault("universal_newlines", True)
kwds.setdefault("creationflags", flags)
p = subprocess.Popen(cmd, **kwds)
_subprocesses_started.add(p)
if PY3:
stdout, stderr = p.communicate(timeout=GLOBAL_TIMEOUT)
else:
stdout, stderr = p.communicate()
if p.returncode != 0:
raise RuntimeError(stderr)
if stderr:
warn(stderr)
if stdout.endswith('\n'):
stdout = stdout[:-1]
return stdout
def reap_children(recursive=False):
"""Terminate and wait() any subprocess started by this test suite
and ensure that no zombies stick around to hog resources and
create problems when looking for refleaks.
If resursive is True it also tries to terminate and wait()
all grandchildren started by this process.
"""
# This is here to make sure wait_procs() behaves properly and
# investigate:
# https://ci.appveyor.com/project/giampaolo/psutil/build/job/
# jiq2cgd6stsbtn60
def assert_gone(pid):
assert not psutil.pid_exists(pid), pid
assert pid not in psutil.pids(), pid
try:
p = psutil.Process(pid)
assert not p.is_running(), pid
except psutil.NoSuchProcess:
pass
else:
assert 0, "pid %s is not gone" % pid
# Get the children here, before terminating the children sub
# processes as we don't want to lose the intermediate reference
# in case of grandchildren.
if recursive:
children = set(psutil.Process().children(recursive=True))
else:
children = set()
# Terminate subprocess.Popen instances "cleanly" by closing their
# fds and wiat()ing for them in order to avoid zombies.
while _subprocesses_started:
subp = _subprocesses_started.pop()
_pids_started.add(subp.pid)
try:
subp.terminate()
except OSError as err:
if WINDOWS and err.winerror == 6: # "invalid handle"
pass
elif err.errno != errno.ESRCH:
raise
if subp.stdout:
subp.stdout.close()
if subp.stderr:
subp.stderr.close()
try:
# Flushing a BufferedWriter may raise an error.
if subp.stdin:
subp.stdin.close()
finally:
# Wait for the process to terminate, to avoid zombies.
try:
subp.wait()
except ChildProcessError:
pass
# Terminate started pids.
while _pids_started:
pid = _pids_started.pop()
try:
p = psutil.Process(pid)
except psutil.NoSuchProcess:
assert_gone(pid)
else:
children.add(p)
# Terminate children.
if children:
for p in children:
try:
p.terminate()
except psutil.NoSuchProcess:
pass
gone, alive = psutil.wait_procs(children, timeout=GLOBAL_TIMEOUT)
for p in alive:
warn("couldn't terminate process %r; attempting kill()" % p)
try:
p.kill()
except psutil.NoSuchProcess:
pass
gone, alive = psutil.wait_procs(alive, timeout=GLOBAL_TIMEOUT)
if alive:
for p in alive:
warn("process %r survived kill()" % p)
for p in children:
assert_gone(p.pid)
# ===================================================================
# --- OS
# ===================================================================
def get_kernel_version():
"""Return a tuple such as (2, 6, 36)."""
if not POSIX:
raise NotImplementedError("not POSIX")
s = ""
uname = os.uname()[2]
for c in uname:
if c.isdigit() or c == '.':
s += c
else:
break
if not s:
raise ValueError("can't parse %r" % uname)
minor = 0
micro = 0
nums = s.split('.')
major = int(nums[0])
if len(nums) >= 2:
minor = int(nums[1])
if len(nums) >= 3:
micro = int(nums[2])
return (major, minor, micro)
def get_winver():
if not WINDOWS:
raise NotImplementedError("not WINDOWS")
wv = sys.getwindowsversion()
if hasattr(wv, 'service_pack_major'): # python >= 2.7
sp = wv.service_pack_major or 0
else:
r = re.search(r"\s\d$", wv[4])
if r:
sp = int(r.group(0))
else:
sp = 0
return (wv[0], wv[1], sp)
# ===================================================================
# --- sync primitives
# ===================================================================
class retry(object):
"""A retry decorator."""
def __init__(self,
exception=Exception,
timeout=None,
retries=None,
interval=0.001,
logfun=None,
):
if timeout and retries:
raise ValueError("timeout and retries args are mutually exclusive")
self.exception = exception
self.timeout = timeout
self.retries = retries
self.interval = interval
self.logfun = logfun
def __iter__(self):
if self.timeout:
stop_at = time.time() + self.timeout
while time.time() < stop_at:
yield
elif self.retries:
for _ in range(self.retries):
yield
else:
while True:
yield
def sleep(self):
if self.interval is not None:
time.sleep(self.interval)
def __call__(self, fun):
@functools.wraps(fun)
def wrapper(*args, **kwargs):
exc = None
for _ in self:
try:
return fun(*args, **kwargs)
except self.exception as _: # NOQA
exc = _
if self.logfun is not None:
self.logfun(exc)
self.sleep()
continue
if PY3:
raise exc
else:
raise
# This way the user of the decorated function can change config
# parameters.
wrapper.decorator = self
return wrapper
@retry(exception=psutil.NoSuchProcess, logfun=None, timeout=GLOBAL_TIMEOUT,
interval=0.001)
def wait_for_pid(pid):
"""Wait for pid to show up in the process list then return.
Used in the test suite to give time the sub process to initialize.
"""
psutil.Process(pid)
if WINDOWS:
# give it some more time to allow better initialization
time.sleep(0.01)
@retry(exception=(EnvironmentError, AssertionError), logfun=None,
timeout=GLOBAL_TIMEOUT, interval=0.001)
def wait_for_file(fname, delete=True, empty=False):
"""Wait for a file to be written on disk with some content."""
with open(fname, "rb") as f:
data = f.read()
if not empty:
assert data
if delete:
safe_rmpath(fname)
return data
@retry(exception=AssertionError, logfun=None, timeout=GLOBAL_TIMEOUT,
interval=0.001)
def call_until(fun, expr):
"""Keep calling function for timeout secs and exit if eval()
expression is True.
"""
ret = fun()
assert eval(expr)
return ret
# ===================================================================
# --- fs
# ===================================================================
def safe_rmpath(path):
"Convenience function for removing temporary test files or dirs"
def retry_fun(fun):
# On Windows it could happen that the file or directory has
# open handles or references preventing the delete operation
# to succeed immediately, so we retry for a while. See:
# https://bugs.python.org/issue33240
stop_at = time.time() + 1
while time.time() < stop_at:
try:
return fun()
except FileNotFoundError:
pass
except WindowsError as _:
err = _
warn("ignoring %s" % (str(err)))
time.sleep(0.01)
raise err
try:
st = os.stat(path)
if stat.S_ISDIR(st.st_mode):
fun = functools.partial(shutil.rmtree, path)
else:
fun = functools.partial(os.remove, path)
if POSIX:
fun()
else:
retry_fun(fun)
except FileNotFoundError:
pass
def safe_mkdir(dir):
"Convenience function for creating a directory"
try:
os.mkdir(dir)
except FileExistsError:
pass
@contextlib.contextmanager
def chdir(dirname):
"Context manager which temporarily changes the current directory."
curdir = os.getcwd()
try:
os.chdir(dirname)
yield
finally:
os.chdir(curdir)
def create_exe(outpath, c_code=None):
"""Creates an executable file in the given location."""
assert not os.path.exists(outpath), outpath
if c_code:
if not which("gcc"):
raise ValueError("gcc is not installed")
if isinstance(c_code, bool): # c_code is True
c_code = textwrap.dedent(
"""
#include <unistd.h>
int main() {
pause();
return 1;
}
""")
assert isinstance(c_code, str), c_code
with tempfile.NamedTemporaryFile(
suffix='.c', delete=False, mode='wt') as f:
f.write(c_code)
try:
subprocess.check_call(["gcc", f.name, "-o", outpath])
finally:
safe_rmpath(f.name)
else:
# copy python executable
shutil.copyfile(PYTHON_EXE, outpath)
if POSIX:
st = os.stat(outpath)
os.chmod(outpath, st.st_mode | stat.S_IEXEC)
def unique_filename(prefix=TESTFILE_PREFIX, suffix=""):
return tempfile.mktemp(prefix=prefix, suffix=suffix)
# ===================================================================
# --- testing
# ===================================================================
class TestCase(unittest.TestCase):
# Print a full path representation of the single unit tests
# being run.
def __str__(self):
fqmod = self.__class__.__module__
if not fqmod.startswith('psutil.'):
fqmod = 'psutil.tests.' + fqmod
return "%s.%s.%s" % (
fqmod, self.__class__.__name__, self._testMethodName)
# assertRaisesRegexp renamed to assertRaisesRegex in 3.3;
# add support for the new name.
if not hasattr(unittest.TestCase, 'assertRaisesRegex'):
assertRaisesRegex = unittest.TestCase.assertRaisesRegexp
# override default unittest.TestCase
unittest.TestCase = TestCase
def retry_on_failure(retries=NO_RETRIES):
"""Decorator which runs a test function and retries N times before
actually failing.
"""
def logfun(exc):
print("%r, retrying" % exc, file=sys.stderr)
return retry(exception=AssertionError, timeout=None, retries=retries,
logfun=logfun)
def skip_on_access_denied(only_if=None):
"""Decorator to Ignore AccessDenied exceptions."""
def decorator(fun):
@functools.wraps(fun)
def wrapper(*args, **kwargs):
try:
return fun(*args, **kwargs)
except psutil.AccessDenied:
if only_if is not None:
if not only_if:
raise
raise unittest.SkipTest("raises AccessDenied")
return wrapper
return decorator
def skip_on_not_implemented(only_if=None):
"""Decorator to Ignore NotImplementedError exceptions."""
def decorator(fun):
@functools.wraps(fun)
def wrapper(*args, **kwargs):
try:
return fun(*args, **kwargs)
except NotImplementedError:
if only_if is not None:
if not only_if:
raise
msg = "%r was skipped because it raised NotImplementedError" \
% fun.__name__
raise unittest.SkipTest(msg)
return wrapper
return decorator
# ===================================================================
# --- network
# ===================================================================
def get_free_port(host='127.0.0.1'):
"""Return an unused TCP port."""
with contextlib.closing(socket.socket()) as sock:
sock.bind((host, 0))
return sock.getsockname()[1]
@contextlib.contextmanager
def unix_socket_path(suffix=""):
"""A context manager which returns a non-existent file name
and tries to delete it on exit.
"""
assert psutil.POSIX
path = unique_filename(suffix=suffix)
try:
yield path
finally:
try:
os.unlink(path)
except OSError:
pass
def bind_socket(family=AF_INET, type=SOCK_STREAM, addr=None):
"""Binds a generic socket."""
if addr is None and family in (AF_INET, AF_INET6):
addr = ("", 0)
sock = socket.socket(family, type)
try:
if os.name not in ('nt', 'cygwin'):
sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
sock.bind(addr)
if type == socket.SOCK_STREAM:
sock.listen(5)
return sock
except Exception:
sock.close()
raise
def bind_unix_socket(name, type=socket.SOCK_STREAM):
"""Bind a UNIX socket."""
assert psutil.POSIX
assert not os.path.exists(name), name
sock = socket.socket(socket.AF_UNIX, type)
try:
sock.bind(name)
if type == socket.SOCK_STREAM:
sock.listen(5)
except Exception:
sock.close()
raise
return sock
def tcp_socketpair(family, addr=("", 0)):
"""Build a pair of TCP sockets connected to each other.
Return a (server, client) tuple.
"""
with contextlib.closing(socket.socket(family, SOCK_STREAM)) as ll:
ll.bind(addr)
ll.listen(5)
addr = ll.getsockname()
c = socket.socket(family, SOCK_STREAM)
try:
c.connect(addr)
caddr = c.getsockname()
while True:
a, addr = ll.accept()
# check that we've got the correct client
if addr == caddr:
return (a, c)
a.close()
except OSError:
c.close()
raise
def unix_socketpair(name):
"""Build a pair of UNIX sockets connected to each other through
the same UNIX file name.
Return a (server, client) tuple.
"""
assert psutil.POSIX
server = client = None
try:
server = bind_unix_socket(name, type=socket.SOCK_STREAM)
server.setblocking(0)
client = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)
client.setblocking(0)
client.connect(name)
# new = server.accept()
except Exception:
if server is not None:
server.close()
if client is not None:
client.close()
raise
return (server, client)
@contextlib.contextmanager
def create_sockets():
"""Open as many socket families / types as possible."""
socks = []
fname1 = fname2 = None
try:
socks.append(bind_socket(socket.AF_INET, socket.SOCK_STREAM))
socks.append(bind_socket(socket.AF_INET, socket.SOCK_DGRAM))
if supports_ipv6():
socks.append(bind_socket(socket.AF_INET6, socket.SOCK_STREAM))
socks.append(bind_socket(socket.AF_INET6, socket.SOCK_DGRAM))
if POSIX and HAS_CONNECTIONS_UNIX:
fname1 = unix_socket_path().__enter__()
fname2 = unix_socket_path().__enter__()
s1, s2 = unix_socketpair(fname1)
s3 = bind_unix_socket(fname2, type=socket.SOCK_DGRAM)
# self.addCleanup(safe_rmpath, fname1)
# self.addCleanup(safe_rmpath, fname2)
for s in (s1, s2, s3):
socks.append(s)
yield socks
finally:
for s in socks:
s.close()
if fname1 is not None:
safe_rmpath(fname1)
if fname2 is not None:
safe_rmpath(fname2)
def check_net_address(addr, family):
"""Check a net address validity. Supported families are IPv4,