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Close #10142: Support for SEEK_HOLE/SEEK_DATA

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This commit is contained in:
Jesus Cea 2012-04-26 16:39:35 +02:00
parent 790a9b4c19
commit 2b47f0a23f
8 changed files with 60 additions and 12 deletions
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20
Lib/test/test_posix.py
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@ -1009,6 +1009,26 @@ class PosixTester(unittest.TestCase):
posix.RTLD_GLOBAL
posix.RTLD_LOCAL
@unittest.skipUnless('PC_MIN_HOLE_SIZE' in os.pathconf_names,
"test needs an OS that reports file holes")
def test_fs_holes(self) :
# Even if the filesystem doesn't report holes,
# if the OS supports it the SEEK_* constants
# will be defined and will have a consistent
# behaviour:
# os.SEEK_DATA = current position
# os.SEEK_HOLE = end of file position
with open(support.TESTFN, 'r+b') as fp :
fp.write(b"hello")
fp.flush()
size = fp.tell()
fno = fp.fileno()
for i in range(size) :
self.assertEqual(i, os.lseek(fno, i, os.SEEK_DATA))
self.assertLessEqual(size, os.lseek(fno, i, os.SEEK_HOLE))
self.assertRaises(OSError, os.lseek, fno, size, os.SEEK_DATA)
self.assertRaises(OSError, os.lseek, fno, size, os.SEEK_HOLE)
class PosixGroupsTester(unittest.TestCase):
def setUp(self):