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cpython/Lib/test/test_posix.py
Ronald Oussoren bb4d9f6c3d Merged revisions 83643 via svnmerge from 
svn+ssh://pythondev@svn.python.org/python/branches/release27-maint

................
  r83643 | ronald.oussoren | 2010-08-03 09:31:12 +0200 (Tue, 03 Aug 2010) | 13 lines

  Merged revisions 83431 via svnmerge from
  svn+ssh://pythondev@svn.python.org/python/branches/py3k

  ........
    r83431 | ronald.oussoren | 2010-08-01 21:18:13 +0200 (Sun, 01 Aug 2010) | 6 lines


    test_getgroups as introduced with issue7900 failed on systems
    where 'id -G' and posix.getgroups() returned the same information,
    but one of the sources contains duplicate information. Rewrite the
    check using sets instead of lists.
  ........
................
2010-08-03 08:07:18 +00:00

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"Test posix functions"
from test import test_support
try:
import posix
except ImportError:
raise test_support.TestSkipped, "posix is not available"
import errno
import sys
import time
import os
import pwd
import shutil
import sys
import unittest
import warnings
warnings.filterwarnings('ignore', '.* potential security risk .*',
RuntimeWarning)
class PosixTester(unittest.TestCase):
def setUp(self):
# create empty file
fp = open(test_support.TESTFN, 'w+')
fp.close()
def tearDown(self):
os.unlink(test_support.TESTFN)
def testNoArgFunctions(self):
# test posix functions which take no arguments and have
# no side-effects which we need to cleanup (e.g., fork, wait, abort)
NO_ARG_FUNCTIONS = [ "ctermid", "getcwd", "getcwdu", "uname",
"times", "getloadavg", "tmpnam",
"getegid", "geteuid", "getgid", "getgroups",
"getpid", "getpgrp", "getppid", "getuid",
]
for name in NO_ARG_FUNCTIONS:
posix_func = getattr(posix, name, None)
if posix_func is not None:
posix_func()
self.assertRaises(TypeError, posix_func, 1)
def test_statvfs(self):
if hasattr(posix, 'statvfs'):
self.assert_(posix.statvfs(os.curdir))
def test_fstatvfs(self):
if hasattr(posix, 'fstatvfs'):
fp = open(test_support.TESTFN)
try:
self.assert_(posix.fstatvfs(fp.fileno()))
finally:
fp.close()
def test_ftruncate(self):
if hasattr(posix, 'ftruncate'):
fp = open(test_support.TESTFN, 'w+')
try:
# we need to have some data to truncate
fp.write('test')
fp.flush()
posix.ftruncate(fp.fileno(), 0)
finally:
fp.close()
def test_dup(self):
if hasattr(posix, 'dup'):
fp = open(test_support.TESTFN)
try:
fd = posix.dup(fp.fileno())
self.assert_(isinstance(fd, int))
os.close(fd)
finally:
fp.close()
def test_confstr(self):
if hasattr(posix, 'confstr'):
self.assertRaises(ValueError, posix.confstr, "CS_garbage")
self.assertEqual(len(posix.confstr("CS_PATH")) > 0, True)
def test_dup2(self):
if hasattr(posix, 'dup2'):
fp1 = open(test_support.TESTFN)
fp2 = open(test_support.TESTFN)
try:
posix.dup2(fp1.fileno(), fp2.fileno())
finally:
fp1.close()
fp2.close()
def fdopen_helper(self, *args):
fd = os.open(test_support.TESTFN, os.O_RDONLY)
fp2 = posix.fdopen(fd, *args)
fp2.close()
def test_fdopen(self):
if hasattr(posix, 'fdopen'):
self.fdopen_helper()
self.fdopen_helper('r')
self.fdopen_helper('r', 100)
def test_osexlock(self):
if hasattr(posix, "O_EXLOCK"):
fd = os.open(test_support.TESTFN,
os.O_WRONLY|os.O_EXLOCK|os.O_CREAT)
self.assertRaises(OSError, os.open, test_support.TESTFN,
os.O_WRONLY|os.O_EXLOCK|os.O_NONBLOCK)
os.close(fd)
if hasattr(posix, "O_SHLOCK"):
fd = os.open(test_support.TESTFN,
os.O_WRONLY|os.O_SHLOCK|os.O_CREAT)
self.assertRaises(OSError, os.open, test_support.TESTFN,
os.O_WRONLY|os.O_EXLOCK|os.O_NONBLOCK)
os.close(fd)
def test_osshlock(self):
if hasattr(posix, "O_SHLOCK"):
fd1 = os.open(test_support.TESTFN,
os.O_WRONLY|os.O_SHLOCK|os.O_CREAT)
fd2 = os.open(test_support.TESTFN,
os.O_WRONLY|os.O_SHLOCK|os.O_CREAT)
os.close(fd2)
os.close(fd1)
if hasattr(posix, "O_EXLOCK"):
fd = os.open(test_support.TESTFN,
os.O_WRONLY|os.O_SHLOCK|os.O_CREAT)
self.assertRaises(OSError, os.open, test_support.TESTFN,
os.O_RDONLY|os.O_EXLOCK|os.O_NONBLOCK)
os.close(fd)
def test_fstat(self):
if hasattr(posix, 'fstat'):
fp = open(test_support.TESTFN)
try:
self.assert_(posix.fstat(fp.fileno()))
finally:
fp.close()
def test_stat(self):
if hasattr(posix, 'stat'):
self.assert_(posix.stat(test_support.TESTFN))
def _test_all_chown_common(self, chown_func, first_param):
"""Common code for chown, fchown and lchown tests."""
if os.getuid() == 0:
try:
# Many linux distros have a nfsnobody user as MAX_UID-2
# that makes a good test case for signedness issues.
# http://bugs.python.org/issue1747858
# This part of the test only runs when run as root.
# Only scary people run their tests as root.
ent = pwd.getpwnam('nfsnobody')
chown_func(first_param, ent.pw_uid, ent.pw_gid)
except KeyError:
pass
else:
# non-root cannot chown to root, raises OSError
self.assertRaises(OSError, chown_func,
first_param, 0, 0)
# test a successful chown call
chown_func(first_param, os.getuid(), os.getgid())
def _test_chown(self):
# raise an OSError if the file does not exist
os.unlink(test_support.TESTFN)
self.assertRaises(OSError, posix.chown, test_support.TESTFN, -1, -1)
# re-create the file
open(test_support.TESTFN, 'w').close()
self._test_all_chown_common(posix.chown, test_support.TESTFN)
if hasattr(posix, 'chown'):
test_chown = _test_chown
def _test_fchown(self):
os.unlink(test_support.TESTFN)
# re-create the file
test_file = open(test_support.TESTFN, 'w')
try:
fd = test_file.fileno()
self._test_all_chown_common(posix.fchown, fd)
finally:
test_file.close()
if hasattr(posix, 'fchown'):
test_fchown = _test_fchown
def _test_lchown(self):
os.unlink(test_support.TESTFN)
# create a symlink
os.symlink('/tmp/dummy-symlink-target', test_support.TESTFN)
self._test_all_chown_common(posix.lchown, test_support.TESTFN)
if hasattr(posix, 'lchown'):
test_lchown = _test_lchown
def test_chdir(self):
if hasattr(posix, 'chdir'):
posix.chdir(os.curdir)
self.assertRaises(OSError, posix.chdir, test_support.TESTFN)
def test_lsdir(self):
if hasattr(posix, 'lsdir'):
self.assert_(test_support.TESTFN in posix.lsdir(os.curdir))
def test_access(self):
if hasattr(posix, 'access'):
self.assert_(posix.access(test_support.TESTFN, os.R_OK))
def test_umask(self):
if hasattr(posix, 'umask'):
old_mask = posix.umask(0)
self.assert_(isinstance(old_mask, int))
posix.umask(old_mask)
def test_strerror(self):
if hasattr(posix, 'strerror'):
self.assert_(posix.strerror(0))
def test_pipe(self):
if hasattr(posix, 'pipe'):
reader, writer = posix.pipe()
os.close(reader)
os.close(writer)
def test_tempnam(self):
if hasattr(posix, 'tempnam'):
self.assert_(posix.tempnam())
self.assert_(posix.tempnam(os.curdir))
self.assert_(posix.tempnam(os.curdir, 'blah'))
def test_tmpfile(self):
if hasattr(posix, 'tmpfile'):
fp = posix.tmpfile()
fp.close()
def test_utime(self):
if hasattr(posix, 'utime'):
now = time.time()
posix.utime(test_support.TESTFN, None)
self.assertRaises(TypeError, posix.utime, test_support.TESTFN, (None, None))
self.assertRaises(TypeError, posix.utime, test_support.TESTFN, (now, None))
self.assertRaises(TypeError, posix.utime, test_support.TESTFN, (None, now))
posix.utime(test_support.TESTFN, (int(now), int(now)))
posix.utime(test_support.TESTFN, (now, now))
def test_chflags(self):
if hasattr(posix, 'chflags'):
st = os.stat(test_support.TESTFN)
if hasattr(st, 'st_flags'):
posix.chflags(test_support.TESTFN, st.st_flags)
def test_lchflags(self):
if hasattr(posix, 'lchflags'):
st = os.stat(test_support.TESTFN)
if hasattr(st, 'st_flags'):
posix.lchflags(test_support.TESTFN, st.st_flags)
def test_getcwd_long_pathnames(self):
if hasattr(posix, 'getcwd'):
dirname = 'getcwd-test-directory-0123456789abcdef-01234567890abcdef'
curdir = os.getcwd()
base_path = os.path.abspath(test_support.TESTFN) + '.getcwd'
try:
os.mkdir(base_path)
os.chdir(base_path)
except:
# Just returning nothing instead of the TestSkipped exception,
# because the test results in Error in that case.
# Is that ok?
# raise test_support.TestSkipped, "cannot create directory for testing"
return
try:
def _create_and_do_getcwd(dirname, current_path_length = 0):
try:
os.mkdir(dirname)
except:
raise test_support.TestSkipped, "mkdir cannot create directory sufficiently deep for getcwd test"
os.chdir(dirname)
try:
os.getcwd()
if current_path_length < 4099:
_create_and_do_getcwd(dirname, current_path_length + len(dirname) + 1)
except OSError as e:
expected_errno = errno.ENAMETOOLONG
if 'sunos' in sys.platform or 'openbsd' in sys.platform:
expected_errno = errno.ERANGE # Issue 9185
self.assertEqual(e.errno, expected_errno)
finally:
os.chdir('..')
os.rmdir(dirname)
_create_and_do_getcwd(dirname)
finally:
os.chdir(curdir)
shutil.rmtree(base_path)
def test_getgroups(self):
with os.popen('id -G 2>/dev/null') as idg:
groups = idg.read().strip()
if not groups:
# This test needs 'id -G'
return
# 'id -G' and 'os.getgroups()' should return the same
# groups, ignoring order and duplicates.
self.assertEqual(
set([int(x) for x in groups.split()]),
set(posix.getgroups()))
class PosixGroupsTester(unittest.TestCase):
if posix.getuid() == 0 and hasattr(posix, 'getgroups') and sys.platform != 'darwin':
def setUp(self):
self.saved_groups = posix.getgroups()
def tearDown(self):
if hasattr(posix, 'setgroups'):
posix.setgroups(self.saved_groups)
elif hasattr(posix, 'initgroups'):
name = pwd.getpwuid(posix.getuid()).pw_name
posix.initgroups(name, self.saved_groups[0])
if hasattr(posix, 'initgroups'):
def test_initgroups(self):
# find missing group
groups = sorted(self.saved_groups)
for g1,g2 in zip(groups[:-1], groups[1:]):
g = g1 + 1
if g < g2:
break
else:
g = g2 + 1
name = pwd.getpwuid(posix.getuid()).pw_name
posix.initgroups(name, g)
self.assertIn(g, posix.getgroups())
if hasattr(posix, 'setgroups'):
def test_setgroups(self):
for groups in [[0], range(16)]:
posix.setgroups(groups)
self.assertListEqual(groups, posix.getgroups())
def test_main():
test_support.run_unittest(PosixTester, PosixGroupsTester)
if __name__ == '__main__':
test_main()
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