180 lines
7.0 KiB
Python
180 lines
7.0 KiB
Python
import contextlib
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import sys
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import unittest
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from test import support
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import time
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resource = support.import_module('resource')
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# This test is checking a few specific problem spots with the resource module.
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class ResourceTest(unittest.TestCase):
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def test_args(self):
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self.assertRaises(TypeError, resource.getrlimit)
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self.assertRaises(TypeError, resource.getrlimit, 42, 42)
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self.assertRaises(TypeError, resource.setrlimit)
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self.assertRaises(TypeError, resource.setrlimit, 42, 42, 42)
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@unittest.skipIf(sys.platform == "vxworks",
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"setting RLIMIT_FSIZE is not supported on VxWorks")
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def test_fsize_ismax(self):
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try:
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(cur, max) = resource.getrlimit(resource.RLIMIT_FSIZE)
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except AttributeError:
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pass
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else:
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# RLIMIT_FSIZE should be RLIM_INFINITY, which will be a really big
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# number on a platform with large file support. On these platforms,
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# we need to test that the get/setrlimit functions properly convert
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# the number to a C long long and that the conversion doesn't raise
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# an error.
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self.assertEqual(resource.RLIM_INFINITY, max)
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resource.setrlimit(resource.RLIMIT_FSIZE, (cur, max))
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def test_fsize_enforced(self):
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try:
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(cur, max) = resource.getrlimit(resource.RLIMIT_FSIZE)
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except AttributeError:
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pass
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else:
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# Check to see what happens when the RLIMIT_FSIZE is small. Some
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# versions of Python were terminated by an uncaught SIGXFSZ, but
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# pythonrun.c has been fixed to ignore that exception. If so, the
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# write() should return EFBIG when the limit is exceeded.
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# At least one platform has an unlimited RLIMIT_FSIZE and attempts
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# to change it raise ValueError instead.
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try:
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try:
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resource.setrlimit(resource.RLIMIT_FSIZE, (1024, max))
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limit_set = True
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except ValueError:
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limit_set = False
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f = open(support.TESTFN, "wb")
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try:
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f.write(b"X" * 1024)
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try:
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f.write(b"Y")
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f.flush()
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# On some systems (e.g., Ubuntu on hppa) the flush()
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# doesn't always cause the exception, but the close()
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# does eventually. Try flushing several times in
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# an attempt to ensure the file is really synced and
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# the exception raised.
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for i in range(5):
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time.sleep(.1)
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f.flush()
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except OSError:
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if not limit_set:
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raise
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if limit_set:
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# Close will attempt to flush the byte we wrote
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# Restore limit first to avoid getting a spurious error
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resource.setrlimit(resource.RLIMIT_FSIZE, (cur, max))
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finally:
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f.close()
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finally:
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if limit_set:
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resource.setrlimit(resource.RLIMIT_FSIZE, (cur, max))
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support.unlink(support.TESTFN)
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def test_fsize_toobig(self):
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# Be sure that setrlimit is checking for really large values
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too_big = 10**50
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try:
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(cur, max) = resource.getrlimit(resource.RLIMIT_FSIZE)
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except AttributeError:
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pass
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else:
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try:
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resource.setrlimit(resource.RLIMIT_FSIZE, (too_big, max))
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except (OverflowError, ValueError):
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pass
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try:
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resource.setrlimit(resource.RLIMIT_FSIZE, (max, too_big))
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except (OverflowError, ValueError):
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pass
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def test_getrusage(self):
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self.assertRaises(TypeError, resource.getrusage)
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self.assertRaises(TypeError, resource.getrusage, 42, 42)
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usageself = resource.getrusage(resource.RUSAGE_SELF)
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usagechildren = resource.getrusage(resource.RUSAGE_CHILDREN)
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# May not be available on all systems.
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try:
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usageboth = resource.getrusage(resource.RUSAGE_BOTH)
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except (ValueError, AttributeError):
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pass
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try:
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usage_thread = resource.getrusage(resource.RUSAGE_THREAD)
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except (ValueError, AttributeError):
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pass
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# Issue 6083: Reference counting bug
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@unittest.skipIf(sys.platform == "vxworks",
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"setting RLIMIT_CPU is not supported on VxWorks")
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def test_setrusage_refcount(self):
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try:
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limits = resource.getrlimit(resource.RLIMIT_CPU)
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except AttributeError:
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pass
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else:
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class BadSequence:
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def __len__(self):
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return 2
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def __getitem__(self, key):
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if key in (0, 1):
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return len(tuple(range(1000000)))
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raise IndexError
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resource.setrlimit(resource.RLIMIT_CPU, BadSequence())
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def test_pagesize(self):
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pagesize = resource.getpagesize()
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self.assertIsInstance(pagesize, int)
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self.assertGreaterEqual(pagesize, 0)
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@unittest.skipUnless(sys.platform == 'linux', 'test requires Linux')
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def test_linux_constants(self):
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for attr in ['MSGQUEUE', 'NICE', 'RTPRIO', 'RTTIME', 'SIGPENDING']:
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with contextlib.suppress(AttributeError):
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self.assertIsInstance(getattr(resource, 'RLIMIT_' + attr), int)
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def test_freebsd_contants(self):
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for attr in ['SWAP', 'SBSIZE', 'NPTS']:
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with contextlib.suppress(AttributeError):
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self.assertIsInstance(getattr(resource, 'RLIMIT_' + attr), int)
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@unittest.skipUnless(hasattr(resource, 'prlimit'), 'no prlimit')
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@support.requires_linux_version(2, 6, 36)
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def test_prlimit(self):
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self.assertRaises(TypeError, resource.prlimit)
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self.assertRaises(ProcessLookupError, resource.prlimit,
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-1, resource.RLIMIT_AS)
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limit = resource.getrlimit(resource.RLIMIT_AS)
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self.assertEqual(resource.prlimit(0, resource.RLIMIT_AS), limit)
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self.assertEqual(resource.prlimit(0, resource.RLIMIT_AS, limit),
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limit)
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# Issue 20191: Reference counting bug
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@unittest.skipUnless(hasattr(resource, 'prlimit'), 'no prlimit')
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@support.requires_linux_version(2, 6, 36)
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def test_prlimit_refcount(self):
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class BadSeq:
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def __len__(self):
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return 2
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def __getitem__(self, key):
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return limits[key] - 1 # new reference
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limits = resource.getrlimit(resource.RLIMIT_AS)
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self.assertEqual(resource.prlimit(0, resource.RLIMIT_AS, BadSeq()),
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limits)
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def test_main(verbose=None):
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support.run_unittest(ResourceTest)
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if __name__ == "__main__":
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test_main()
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