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import unittest
import os.path
import sys
import test.support
from ctypes import *
from ctypes.util import find_library
# On some systems, loading the OpenGL libraries needs the RTLD_GLOBAL mode.
class Test_OpenGL_libs(unittest.TestCase):
@classmethod
def setUpClass(cls):
lib_gl = lib_glu = lib_gle = None
if sys.platform == "win32":
lib_gl = find_library("OpenGL32")
lib_glu = find_library("Glu32")
elif sys.platform == "darwin":
lib_gl = lib_glu = find_library("OpenGL")
else:
lib_gl = find_library("GL")
lib_glu = find_library("GLU")
lib_gle = find_library("gle")
## print, for debugging
if test.support.verbose:
print("OpenGL libraries:")
for item in (("GL", lib_gl),
("GLU", lib_glu),
("gle", lib_gle)):
print("\t", item)
cls.gl = cls.glu = cls.gle = None
if lib_gl:
try:
cls.gl = CDLL(lib_gl, mode=RTLD_GLOBAL)
except OSError:
pass
if lib_glu:
try:
cls.glu = CDLL(lib_glu, RTLD_GLOBAL)
except OSError:
pass
if lib_gle:
try:
cls.gle = CDLL(lib_gle)
except OSError:
pass
@classmethod
def tearDownClass(cls):
cls.gl = cls.glu = cls.gle = None
def test_gl(self):
if self.gl is None:
self.skipTest('lib_gl not available')
self.gl.glClearIndex
def test_glu(self):
if self.glu is None:
self.skipTest('lib_glu not available')
self.glu.gluBeginCurve
def test_gle(self):
if self.gle is None:
self.skipTest('lib_gle not available')
self.gle.gleGetJoinStyle
def test_shell_injection(self):
result = find_library('; echo Hello shell > ' + test.support.TESTFN)
self.assertFalse(os.path.lexists(test.support.TESTFN))
self.assertIsNone(result)
@unittest.skipUnless(sys.platform.startswith('linux'),
'Test only valid for Linux')
class LibPathFindTest(unittest.TestCase):
def test_find_on_libpath(self):
import subprocess
import tempfile
try:
p = subprocess.Popen(['gcc', '--version'], stdout=subprocess.PIPE,
stderr=subprocess.DEVNULL)
out, _ = p.communicate()
except OSError:
raise unittest.SkipTest('gcc, needed for test, not available')
with tempfile.TemporaryDirectory() as d:
# create an empty temporary file
srcname = os.path.join(d, 'dummy.c')
libname = 'py_ctypes_test_dummy'
dstname = os.path.join(d, 'lib%s.so' % libname)
with open(srcname, 'w') as f:
pass
self.assertTrue(os.path.exists(srcname))
# compile the file to a shared library
cmd = ['gcc', '-o', dstname, '--shared',
'-Wl,-soname,lib%s.so' % libname, srcname]
out = subprocess.check_output(cmd)
self.assertTrue(os.path.exists(dstname))
# now check that the .so can't be found (since not in
# LD_LIBRARY_PATH)
self.assertIsNone(find_library(libname))
# now add the location to LD_LIBRARY_PATH
with test.support.EnvironmentVarGuard() as env:
KEY = 'LD_LIBRARY_PATH'
if KEY not in env:
v = d
else:
v = '%s:%s' % (env[KEY], d)
env.set(KEY, v)
# now check that the .so can be found (since in
# LD_LIBRARY_PATH)
self.assertEqual(find_library(libname), 'lib%s.so' % libname)
if __name__ == "__main__":
unittest.main()