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cpython/Lib/test/test_os.py

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# As a test suite for the os module, this is woefully inadequate, but this
# does add tests for a few functions which have been determined to be more
# portable than they had been thought to be.
import os
import errno
import unittest
import warnings
import sys
import signal
import subprocess
import time
from test import test_support
import mmap
import uuid
warnings.filterwarnings("ignore", "tempnam", RuntimeWarning, __name__)
warnings.filterwarnings("ignore", "tmpnam", RuntimeWarning, __name__)
# Tests creating TESTFN
class FileTests(unittest.TestCase):
def setUp(self):
if os.path.exists(test_support.TESTFN):
os.unlink(test_support.TESTFN)
tearDown = setUp
def test_access(self):
f = os.open(test_support.TESTFN, os.O_CREAT|os.O_RDWR)
os.close(f)
self.assertTrue(os.access(test_support.TESTFN, os.W_OK))
def test_closerange(self):
first = os.open(test_support.TESTFN, os.O_CREAT|os.O_RDWR)
# We must allocate two consecutive file descriptors, otherwise
# it will mess up other file descriptors (perhaps even the three
# standard ones).
second = os.dup(first)
try:
retries = 0
while second != first + 1:
os.close(first)
retries += 1
if retries > 10:
# XXX test skipped
self.skipTest("couldn't allocate two consecutive fds")
first, second = second, os.dup(second)
finally:
os.close(second)
# close a fd that is open, and one that isn't
os.closerange(first, first + 2)
self.assertRaises(OSError, os.write, first, "a")
@test_support.cpython_only
def test_rename(self):
path = unicode(test_support.TESTFN)
old = sys.getrefcount(path)
self.assertRaises(TypeError, os.rename, path, 0)
new = sys.getrefcount(path)
self.assertEqual(old, new)
class TemporaryFileTests(unittest.TestCase):
def setUp(self):
self.files = []
os.mkdir(test_support.TESTFN)
def tearDown(self):
for name in self.files:
os.unlink(name)
os.rmdir(test_support.TESTFN)
def check_tempfile(self, name):
# make sure it doesn't already exist:
self.assertFalse(os.path.exists(name),
"file already exists for temporary file")
# make sure we can create the file
open(name, "w")
self.files.append(name)
def test_tempnam(self):
if not hasattr(os, "tempnam"):
return
with warnings.catch_warnings():
warnings.filterwarnings("ignore", "tempnam", RuntimeWarning,
r"test_os$")
warnings.filterwarnings("ignore", "tempnam", DeprecationWarning)
self.check_tempfile(os.tempnam())
name = os.tempnam(test_support.TESTFN)
self.check_tempfile(name)
name = os.tempnam(test_support.TESTFN, "pfx")
self.assertTrue(os.path.basename(name)[:3] == "pfx")
self.check_tempfile(name)
def test_tmpfile(self):
if not hasattr(os, "tmpfile"):
return
# As with test_tmpnam() below, the Windows implementation of tmpfile()
# attempts to create a file in the root directory of the current drive.
# On Vista and Server 2008, this test will always fail for normal users
# as writing to the root directory requires elevated privileges. With
# XP and below, the semantics of tmpfile() are the same, but the user
# running the test is more likely to have administrative privileges on
# their account already. If that's the case, then os.tmpfile() should
# work. In order to make this test as useful as possible, rather than
# trying to detect Windows versions or whether or not the user has the
# right permissions, just try and create a file in the root directory
# and see if it raises a 'Permission denied' OSError. If it does, then
# test that a subsequent call to os.tmpfile() raises the same error. If
# it doesn't, assume we're on XP or below and the user running the test
# has administrative privileges, and proceed with the test as normal.
with warnings.catch_warnings():
warnings.filterwarnings("ignore", "tmpfile", DeprecationWarning)
if sys.platform == 'win32':
name = '\\python_test_os_test_tmpfile.txt'
if os.path.exists(name):
os.remove(name)
try:
fp = open(name, 'w')
except IOError, first:
# open() failed, assert tmpfile() fails in the same way.
# Although open() raises an IOError and os.tmpfile() raises an
# OSError(), 'args' will be (13, 'Permission denied') in both
# cases.
try:
fp = os.tmpfile()
except OSError, second:
self.assertEqual(first.args, second.args)
else:
self.fail("expected os.tmpfile() to raise OSError")
return
else:
# open() worked, therefore, tmpfile() should work. Close our
# dummy file and proceed with the test as normal.
fp.close()
os.remove(name)
fp = os.tmpfile()
fp.write("foobar")
fp.seek(0,0)
s = fp.read()
fp.close()
self.assertTrue(s == "foobar")
def test_tmpnam(self):
if not hasattr(os, "tmpnam"):
return
with warnings.catch_warnings():
warnings.filterwarnings("ignore", "tmpnam", RuntimeWarning,
r"test_os$")
warnings.filterwarnings("ignore", "tmpnam", DeprecationWarning)
name = os.tmpnam()
if sys.platform in ("win32",):
# The Windows tmpnam() seems useless. From the MS docs:
#
# The character string that tmpnam creates consists of
# the path prefix, defined by the entry P_tmpdir in the
# file STDIO.H, followed by a sequence consisting of the
# digit characters '0' through '9'; the numerical value
# of this string is in the range 1 - 65,535. Changing the
# definitions of L_tmpnam or P_tmpdir in STDIO.H does not
# change the operation of tmpnam.
#
# The really bizarre part is that, at least under MSVC6,
# P_tmpdir is "\\". That is, the path returned refers to
# the root of the current drive. That's a terrible place to
# put temp files, and, depending on privileges, the user
# may not even be able to open a file in the root directory.
self.assertFalse(os.path.exists(name),
"file already exists for temporary file")
else:
self.check_tempfile(name)
# Test attributes on return values from os.*stat* family.
class StatAttributeTests(unittest.TestCase):
def setUp(self):
os.mkdir(test_support.TESTFN)
self.fname = os.path.join(test_support.TESTFN, "f1")
f = open(self.fname, 'wb')
f.write("ABC")
f.close()
def tearDown(self):
os.unlink(self.fname)
os.rmdir(test_support.TESTFN)
def test_stat_attributes(self):
if not hasattr(os, "stat"):
return
import stat
result = os.stat(self.fname)
# Make sure direct access works
self.assertEqual(result[stat.ST_SIZE], 3)
self.assertEqual(result.st_size, 3)
# Make sure all the attributes are there
members = dir(result)
for name in dir(stat):
if name[:3] == 'ST_':
attr = name.lower()
if name.endswith("TIME"):
def trunc(x): return int(x)
else:
def trunc(x): return x
self.assertEqual(trunc(getattr(result, attr)),
result[getattr(stat, name)])
self.assertIn(attr, members)
try:
result[200]
self.fail("No exception thrown")
except IndexError:
pass
# Make sure that assignment fails
try:
result.st_mode = 1
self.fail("No exception thrown")
except (AttributeError, TypeError):
pass
try:
result.st_rdev = 1
self.fail("No exception thrown")
except (AttributeError, TypeError):
pass
try:
result.parrot = 1
self.fail("No exception thrown")
except AttributeError:
pass
# Use the stat_result constructor with a too-short tuple.
try:
result2 = os.stat_result((10,))
self.fail("No exception thrown")
except TypeError:
pass
# Use the constructor with a too-long tuple.
try:
result2 = os.stat_result((0,1,2,3,4,5,6,7,8,9,10,11,12,13,14))
except TypeError:
pass
def test_statvfs_attributes(self):
if not hasattr(os, "statvfs"):
return
try:
result = os.statvfs(self.fname)
except OSError, e:
# On AtheOS, glibc always returns ENOSYS
if e.errno == errno.ENOSYS:
return
# Make sure direct access works
self.assertEqual(result.f_bfree, result[3])
# Make sure all the attributes are there.
members = ('bsize', 'frsize', 'blocks', 'bfree', 'bavail', 'files',
'ffree', 'favail', 'flag', 'namemax')
for value, member in enumerate(members):
self.assertEqual(getattr(result, 'f_' + member), result[value])
# Make sure that assignment really fails
try:
result.f_bfree = 1
self.fail("No exception thrown")
except TypeError:
pass
try:
result.parrot = 1
self.fail("No exception thrown")
except AttributeError:
pass
# Use the constructor with a too-short tuple.
try:
result2 = os.statvfs_result((10,))
self.fail("No exception thrown")
except TypeError:
pass
# Use the constructor with a too-long tuple.
try:
result2 = os.statvfs_result((0,1,2,3,4,5,6,7,8,9,10,11,12,13,14))
except TypeError:
pass
def test_utime_dir(self):
delta = 1000000
st = os.stat(test_support.TESTFN)
# round to int, because some systems may support sub-second
# time stamps in stat, but not in utime.
os.utime(test_support.TESTFN, (st.st_atime, int(st.st_mtime-delta)))
st2 = os.stat(test_support.TESTFN)
self.assertEqual(st2.st_mtime, int(st.st_mtime-delta))
# Restrict test to Win32, since there is no guarantee other
# systems support centiseconds
if sys.platform == 'win32':
def get_file_system(path):
root = os.path.splitdrive(os.path.abspath(path))[0] + '\\'
import ctypes
kernel32 = ctypes.windll.kernel32
buf = ctypes.create_string_buffer("", 100)
if kernel32.GetVolumeInformationA(root, None, 0, None, None, None, buf, len(buf)):
return buf.value
if get_file_system(test_support.TESTFN) == "NTFS":
def test_1565150(self):
t1 = 1159195039.25
os.utime(self.fname, (t1, t1))
self.assertEqual(os.stat(self.fname).st_mtime, t1)
def test_large_time(self):
t1 = 5000000000 # some day in 2128
os.utime(self.fname, (t1, t1))
self.assertEqual(os.stat(self.fname).st_mtime, t1)
def test_1686475(self):
# Verify that an open file can be stat'ed
try:
os.stat(r"c:\pagefile.sys")
except WindowsError, e:
if e.errno == 2: # file does not exist; cannot run test
return
self.fail("Could not stat pagefile.sys")
from test import mapping_tests
class EnvironTests(mapping_tests.BasicTestMappingProtocol):
"""check that os.environ object conform to mapping protocol"""
type2test = None
def _reference(self):
return {"KEY1":"VALUE1", "KEY2":"VALUE2", "KEY3":"VALUE3"}
def _empty_mapping(self):
os.environ.clear()
return os.environ
def setUp(self):
self.__save = dict(os.environ)
os.environ.clear()
def tearDown(self):
os.environ.clear()
os.environ.update(self.__save)
# Bug 1110478
def test_update2(self):
if os.path.exists("/bin/sh"):
os.environ.update(HELLO="World")
with os.popen("/bin/sh -c 'echo $HELLO'") as popen:
value = popen.read().strip()
self.assertEqual(value, "World")
# On FreeBSD < 7 and OS X < 10.6, unsetenv() doesn't return a value (issue
# #13415).
@unittest.skipIf(sys.platform.startswith(('freebsd', 'darwin')),
"due to known OS bug: see issue #13415")
def test_unset_error(self):
if sys.platform == "win32":
# an environment variable is limited to 32,767 characters
key = 'x' * 50000
self.assertRaises(ValueError, os.environ.__delitem__, key)
else:
# "=" is not allowed in a variable name
key = 'key='
self.assertRaises(OSError, os.environ.__delitem__, key)
class WalkTests(unittest.TestCase):
"""Tests for os.walk()."""
def test_traversal(self):
import os
from os.path import join
# Build:
# TESTFN/
# TEST1/ a file kid and two directory kids
# tmp1
# SUB1/ a file kid and a directory kid
# tmp2
# SUB11/ no kids
# SUB2/ a file kid and a dirsymlink kid
# tmp3
# link/ a symlink to TESTFN.2
# TEST2/
# tmp4 a lone file
walk_path = join(test_support.TESTFN, "TEST1")
sub1_path = join(walk_path, "SUB1")
sub11_path = join(sub1_path, "SUB11")
sub2_path = join(walk_path, "SUB2")
tmp1_path = join(walk_path, "tmp1")
tmp2_path = join(sub1_path, "tmp2")
tmp3_path = join(sub2_path, "tmp3")
link_path = join(sub2_path, "link")
t2_path = join(test_support.TESTFN, "TEST2")
tmp4_path = join(test_support.TESTFN, "TEST2", "tmp4")
# Create stuff.
os.makedirs(sub11_path)
os.makedirs(sub2_path)
os.makedirs(t2_path)
for path in tmp1_path, tmp2_path, tmp3_path, tmp4_path:
f = file(path, "w")
f.write("I'm " + path + " and proud of it. Blame test_os.\n")
f.close()
if hasattr(os, "symlink"):
os.symlink(os.path.abspath(t2_path), link_path)
sub2_tree = (sub2_path, ["link"], ["tmp3"])
else:
sub2_tree = (sub2_path, [], ["tmp3"])
# Walk top-down.
all = list(os.walk(walk_path))
self.assertEqual(len(all), 4)
# We can't know which order SUB1 and SUB2 will appear in.
# Not flipped: TESTFN, SUB1, SUB11, SUB2
# flipped: TESTFN, SUB2, SUB1, SUB11
flipped = all[0][1][0] != "SUB1"
all[0][1].sort()
self.assertEqual(all[0], (walk_path, ["SUB1", "SUB2"], ["tmp1"]))
self.assertEqual(all[1 + flipped], (sub1_path, ["SUB11"], ["tmp2"]))
self.assertEqual(all[2 + flipped], (sub11_path, [], []))
self.assertEqual(all[3 - 2 * flipped], sub2_tree)
# Prune the search.
all = []
for root, dirs, files in os.walk(walk_path):
all.append((root, dirs, files))
# Don't descend into SUB1.
if 'SUB1' in dirs:
# Note that this also mutates the dirs we appended to all!
dirs.remove('SUB1')
self.assertEqual(len(all), 2)
self.assertEqual(all[0], (walk_path, ["SUB2"], ["tmp1"]))
self.assertEqual(all[1], sub2_tree)
# Walk bottom-up.
all = list(os.walk(walk_path, topdown=False))
self.assertEqual(len(all), 4)
# We can't know which order SUB1 and SUB2 will appear in.
# Not flipped: SUB11, SUB1, SUB2, TESTFN
# flipped: SUB2, SUB11, SUB1, TESTFN
flipped = all[3][1][0] != "SUB1"
all[3][1].sort()
self.assertEqual(all[3], (walk_path, ["SUB1", "SUB2"], ["tmp1"]))
self.assertEqual(all[flipped], (sub11_path, [], []))
self.assertEqual(all[flipped + 1], (sub1_path, ["SUB11"], ["tmp2"]))
self.assertEqual(all[2 - 2 * flipped], sub2_tree)
if hasattr(os, "symlink"):
# Walk, following symlinks.
for root, dirs, files in os.walk(walk_path, followlinks=True):
if root == link_path:
self.assertEqual(dirs, [])
self.assertEqual(files, ["tmp4"])
break
else:
self.fail("Didn't follow symlink with followlinks=True")
def tearDown(self):
# Tear everything down. This is a decent use for bottom-up on
# Windows, which doesn't have a recursive delete command. The
# (not so) subtlety is that rmdir will fail unless the dir's
# kids are removed first, so bottom up is essential.
for root, dirs, files in os.walk(test_support.TESTFN, topdown=False):
for name in files:
os.remove(os.path.join(root, name))
for name in dirs:
dirname = os.path.join(root, name)
if not os.path.islink(dirname):
os.rmdir(dirname)
else:
os.remove(dirname)
os.rmdir(test_support.TESTFN)
class MakedirTests (unittest.TestCase):
def setUp(self):
os.mkdir(test_support.TESTFN)
def test_makedir(self):
base = test_support.TESTFN
path = os.path.join(base, 'dir1', 'dir2', 'dir3')
os.makedirs(path) # Should work
path = os.path.join(base, 'dir1', 'dir2', 'dir3', 'dir4')
os.makedirs(path)
# Try paths with a '.' in them
self.assertRaises(OSError, os.makedirs, os.curdir)
path = os.path.join(base, 'dir1', 'dir2', 'dir3', 'dir4', 'dir5', os.curdir)
os.makedirs(path)
path = os.path.join(base, 'dir1', os.curdir, 'dir2', 'dir3', 'dir4',
'dir5', 'dir6')
os.makedirs(path)
def tearDown(self):
path = os.path.join(test_support.TESTFN, 'dir1', 'dir2', 'dir3',
'dir4', 'dir5', 'dir6')
# If the tests failed, the bottom-most directory ('../dir6')
# may not have been created, so we look for the outermost directory
# that exists.
while not os.path.exists(path) and path != test_support.TESTFN:
path = os.path.dirname(path)
os.removedirs(path)
class DevNullTests (unittest.TestCase):
def test_devnull(self):
f = file(os.devnull, 'w')
f.write('hello')
f.close()
f = file(os.devnull, 'r')
self.assertEqual(f.read(), '')
f.close()
class URandomTests (unittest.TestCase):
def test_urandom_length(self):
self.assertEqual(len(os.urandom(0)), 0)
self.assertEqual(len(os.urandom(1)), 1)
self.assertEqual(len(os.urandom(10)), 10)
self.assertEqual(len(os.urandom(100)), 100)
self.assertEqual(len(os.urandom(1000)), 1000)
def test_urandom_value(self):
data1 = os.urandom(16)
data2 = os.urandom(16)
self.assertNotEqual(data1, data2)
def get_urandom_subprocess(self, count):
code = '\n'.join((
'import os, sys',
'data = os.urandom(%s)' % count,
'sys.stdout.write(data)',
'sys.stdout.flush()'))
cmd_line = [sys.executable, '-c', code]
p = subprocess.Popen(cmd_line, stdin=subprocess.PIPE,
stdout=subprocess.PIPE, stderr=subprocess.STDOUT)
out, err = p.communicate()
out = test_support.strip_python_stderr(out)
self.assertEqual(len(out), count)
return out
def test_urandom_subprocess(self):
data1 = self.get_urandom_subprocess(16)
data2 = self.get_urandom_subprocess(16)
self.assertNotEqual(data1, data2)
def test_execvpe_with_bad_arglist(self):
self.assertRaises(ValueError, os.execvpe, 'notepad', [], None)
class Win32ErrorTests(unittest.TestCase):
def test_rename(self):
self.assertRaises(WindowsError, os.rename, test_support.TESTFN, test_support.TESTFN+".bak")
def test_remove(self):
self.assertRaises(WindowsError, os.remove, test_support.TESTFN)
def test_chdir(self):
self.assertRaises(WindowsError, os.chdir, test_support.TESTFN)
def test_mkdir(self):
f = open(test_support.TESTFN, "w")
try:
self.assertRaises(WindowsError, os.mkdir, test_support.TESTFN)
finally:
f.close()
os.unlink(test_support.TESTFN)
def test_utime(self):
self.assertRaises(WindowsError, os.utime, test_support.TESTFN, None)
def test_chmod(self):
self.assertRaises(WindowsError, os.chmod, test_support.TESTFN, 0)
class TestInvalidFD(unittest.TestCase):
singles = ["fchdir", "fdopen", "dup", "fdatasync", "fstat",
"fstatvfs", "fsync", "tcgetpgrp", "ttyname"]
#singles.append("close")
#We omit close because it doesn'r raise an exception on some platforms
def get_single(f):
def helper(self):
if hasattr(os, f):
self.check(getattr(os, f))
return helper
for f in singles:
locals()["test_"+f] = get_single(f)
def check(self, f, *args):
try:
f(test_support.make_bad_fd(), *args)
except OSError as e:
self.assertEqual(e.errno, errno.EBADF)
else:
self.fail("%r didn't raise a OSError with a bad file descriptor"
% f)
def test_isatty(self):
if hasattr(os, "isatty"):
self.assertEqual(os.isatty(test_support.make_bad_fd()), False)
def test_closerange(self):
if hasattr(os, "closerange"):
fd = test_support.make_bad_fd()
# Make sure none of the descriptors we are about to close are
# currently valid (issue 6542).
for i in range(10):
try: os.fstat(fd+i)
except OSError:
pass
else:
break
if i < 2:
raise unittest.SkipTest(
"Unable to acquire a range of invalid file descriptors")
self.assertEqual(os.closerange(fd, fd + i-1), None)
def test_dup2(self):
if hasattr(os, "dup2"):
self.check(os.dup2, 20)
def test_fchmod(self):
if hasattr(os, "fchmod"):
self.check(os.fchmod, 0)
def test_fchown(self):
if hasattr(os, "fchown"):
self.check(os.fchown, -1, -1)
def test_fpathconf(self):
if hasattr(os, "fpathconf"):
self.check(os.fpathconf, "PC_NAME_MAX")
def test_ftruncate(self):
if hasattr(os, "ftruncate"):
self.check(os.ftruncate, 0)
def test_lseek(self):
if hasattr(os, "lseek"):
self.check(os.lseek, 0, 0)
def test_read(self):
if hasattr(os, "read"):
self.check(os.read, 1)
def test_tcsetpgrpt(self):
if hasattr(os, "tcsetpgrp"):
self.check(os.tcsetpgrp, 0)
def test_write(self):
if hasattr(os, "write"):
self.check(os.write, " ")
if sys.platform != 'win32':
class Win32ErrorTests(unittest.TestCase):
pass
class PosixUidGidTests(unittest.TestCase):
if hasattr(os, 'setuid'):
def test_setuid(self):
if os.getuid() != 0:
self.assertRaises(os.error, os.setuid, 0)
self.assertRaises(OverflowError, os.setuid, 1<<32)
if hasattr(os, 'setgid'):
def test_setgid(self):
if os.getuid() != 0:
self.assertRaises(os.error, os.setgid, 0)
self.assertRaises(OverflowError, os.setgid, 1<<32)
if hasattr(os, 'seteuid'):
def test_seteuid(self):
if os.getuid() != 0:
self.assertRaises(os.error, os.seteuid, 0)
self.assertRaises(OverflowError, os.seteuid, 1<<32)
if hasattr(os, 'setegid'):
def test_setegid(self):
if os.getuid() != 0:
self.assertRaises(os.error, os.setegid, 0)
self.assertRaises(OverflowError, os.setegid, 1<<32)
if hasattr(os, 'setreuid'):
def test_setreuid(self):
if os.getuid() != 0:
self.assertRaises(os.error, os.setreuid, 0, 0)
self.assertRaises(OverflowError, os.setreuid, 1<<32, 0)
self.assertRaises(OverflowError, os.setreuid, 0, 1<<32)
def test_setreuid_neg1(self):
# Needs to accept -1. We run this in a subprocess to avoid
# altering the test runner's process state (issue8045).
subprocess.check_call([
sys.executable, '-c',
'import os,sys;os.setreuid(-1,-1);sys.exit(0)'])
if hasattr(os, 'setregid'):
def test_setregid(self):
if os.getuid() != 0:
self.assertRaises(os.error, os.setregid, 0, 0)
self.assertRaises(OverflowError, os.setregid, 1<<32, 0)
self.assertRaises(OverflowError, os.setregid, 0, 1<<32)
def test_setregid_neg1(self):
# Needs to accept -1. We run this in a subprocess to avoid
# altering the test runner's process state (issue8045).
subprocess.check_call([
sys.executable, '-c',
'import os,sys;os.setregid(-1,-1);sys.exit(0)'])
else:
class PosixUidGidTests(unittest.TestCase):
pass
@unittest.skipUnless(sys.platform == "win32", "Win32 specific tests")
class Win32KillTests(unittest.TestCase):
def _kill(self, sig):
# Start sys.executable as a subprocess and communicate from the
# subprocess to the parent that the interpreter is ready. When it
# becomes ready, send *sig* via os.kill to the subprocess and check
# that the return code is equal to *sig*.
import ctypes
from ctypes import wintypes
import msvcrt
# Since we can't access the contents of the process' stdout until the
# process has exited, use PeekNamedPipe to see what's inside stdout
# without waiting. This is done so we can tell that the interpreter
# is started and running at a point where it could handle a signal.
PeekNamedPipe = ctypes.windll.kernel32.PeekNamedPipe
PeekNamedPipe.restype = wintypes.BOOL
PeekNamedPipe.argtypes = (wintypes.HANDLE, # Pipe handle
ctypes.POINTER(ctypes.c_char), # stdout buf
wintypes.DWORD, # Buffer size
ctypes.POINTER(wintypes.DWORD), # bytes read
ctypes.POINTER(wintypes.DWORD), # bytes avail
ctypes.POINTER(wintypes.DWORD)) # bytes left
msg = "running"
proc = subprocess.Popen([sys.executable, "-c",
"import sys;"
"sys.stdout.write('{}');"
"sys.stdout.flush();"
"input()".format(msg)],
stdout=subprocess.PIPE,
stderr=subprocess.PIPE,
stdin=subprocess.PIPE)
self.addCleanup(proc.stdout.close)
self.addCleanup(proc.stderr.close)
self.addCleanup(proc.stdin.close)
count, max = 0, 100
while count < max and proc.poll() is None:
# Create a string buffer to store the result of stdout from the pipe
buf = ctypes.create_string_buffer(len(msg))
# Obtain the text currently in proc.stdout
# Bytes read/avail/left are left as NULL and unused
rslt = PeekNamedPipe(msvcrt.get_osfhandle(proc.stdout.fileno()),
buf, ctypes.sizeof(buf), None, None, None)
self.assertNotEqual(rslt, 0, "PeekNamedPipe failed")
if buf.value:
self.assertEqual(msg, buf.value)
break
time.sleep(0.1)
count += 1
else:
self.fail("Did not receive communication from the subprocess")
os.kill(proc.pid, sig)
self.assertEqual(proc.wait(), sig)
def test_kill_sigterm(self):
# SIGTERM doesn't mean anything special, but make sure it works
self._kill(signal.SIGTERM)
def test_kill_int(self):
# os.kill on Windows can take an int which gets set as the exit code
self._kill(100)
def _kill_with_event(self, event, name):
tagname = "test_os_%s" % uuid.uuid1()
m = mmap.mmap(-1, 1, tagname)
m[0] = '0'
# Run a script which has console control handling enabled.
proc = subprocess.Popen([sys.executable,
os.path.join(os.path.dirname(__file__),
"win_console_handler.py"), tagname],
creationflags=subprocess.CREATE_NEW_PROCESS_GROUP)
# Let the interpreter startup before we send signals. See #3137.
count, max = 0, 20
while count < max and proc.poll() is None:
if m[0] == '1':
break
time.sleep(0.5)
count += 1
else:
self.fail("Subprocess didn't finish initialization")
os.kill(proc.pid, event)
# proc.send_signal(event) could also be done here.
# Allow time for the signal to be passed and the process to exit.
time.sleep(0.5)
if not proc.poll():
# Forcefully kill the process if we weren't able to signal it.
os.kill(proc.pid, signal.SIGINT)
self.fail("subprocess did not stop on {}".format(name))
@unittest.skip("subprocesses aren't inheriting CTRL+C property")
def test_CTRL_C_EVENT(self):
from ctypes import wintypes
import ctypes
# Make a NULL value by creating a pointer with no argument.
NULL = ctypes.POINTER(ctypes.c_int)()
SetConsoleCtrlHandler = ctypes.windll.kernel32.SetConsoleCtrlHandler
SetConsoleCtrlHandler.argtypes = (ctypes.POINTER(ctypes.c_int),
wintypes.BOOL)
SetConsoleCtrlHandler.restype = wintypes.BOOL
# Calling this with NULL and FALSE causes the calling process to
# handle CTRL+C, rather than ignore it. This property is inherited
# by subprocesses.
SetConsoleCtrlHandler(NULL, 0)
self._kill_with_event(signal.CTRL_C_EVENT, "CTRL_C_EVENT")
def test_CTRL_BREAK_EVENT(self):
self._kill_with_event(signal.CTRL_BREAK_EVENT, "CTRL_BREAK_EVENT")
def test_main():
test_support.run_unittest(
FileTests,
TemporaryFileTests,
StatAttributeTests,
EnvironTests,
WalkTests,
MakedirTests,
DevNullTests,
URandomTests,
Win32ErrorTests,
TestInvalidFD,
PosixUidGidTests,
Win32KillTests
)
if __name__ == "__main__":
test_main()
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