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Raise an exception when src and dst refer to the same file via a hard link or a

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symbolic link (bug #851123 / patch #854853, thanks Gregory Ball).
This commit is contained in:
Johannes Gijsbers 2004-08-14 13:30:02 +00:00
parent 404b06814c
commit 46f1459860
2 changed files with 32 additions and 5 deletions
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21
Lib/test/test_shutil.py
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@ -6,6 +6,7 @@ import tempfile
import os
import os.path
from test import test_support
from test.test_support import TESTFN
class TestShutil(unittest.TestCase):
def test_rmtree_errors(self):
@ -26,6 +27,26 @@ class TestShutil(unittest.TestCase):
except:
pass
if hasattr(os, "symlink"):
def test_dont_copy_file_onto_link_to_itself(self):
# bug 851123.
os.mkdir(TESTFN)
src = os.path.join(TESTFN,'cheese')
dst = os.path.join(TESTFN,'shop')
try:
f = open(src,'w')
f.write('cheddar')
f.close()
for funcname in 'link','symlink':
getattr(os, funcname)(src, dst)
self.assertRaises(shutil.Error, shutil.copyfile, src, dst)
self.assertEqual(open(src,'r').read(), 'cheddar')
os.remove(dst)
finally:
try:
shutil.rmtree(TESTFN)
except OSError:
pass
def test_main():