Merged revisions 68763,68773 via svnmerge from

svn+ssh://pythondev@svn.python.org/python/trunk

........
  r68763 | kristjan.jonsson | 2009-01-19 07:10:27 -0600 (Mon, 19 Jan 2009) | 2 lines

  Issue 4957
  Let os.ftruncate raise OSError like documented.
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  r68773 | benjamin.peterson | 2009-01-19 09:51:27 -0600 (Mon, 19 Jan 2009) | 1 line

  simplify code
........

Lib/test/test_os.py

@@ -624,10 +624,9 @@ class TestInvalidFD(unittest.TestCase):
         if hasattr(os, "fpathconf"):
             self.assertRaises(OSError, os.fpathconf, 10, "PC_NAME_MAX")
 
-    #this is a weird one, it raises IOError unlike the others
     def test_ftruncate(self):
         if hasattr(os, "ftruncate"):
-            self.assertRaises(IOError, os.ftruncate, 10, 0)
+            self.assertRaises(OSError, os.ftruncate, 10, 0)
 
     def test_lseek(self):
         if hasattr(os, "lseek"):

Modules/posixmodule.c

@@ -5114,10 +5114,8 @@ posix_ftruncate(PyObject *self, PyObject *args)
 	Py_BEGIN_ALLOW_THREADS
 	res = ftruncate(fd, length);
 	Py_END_ALLOW_THREADS
-	if (res < 0) {
-		PyErr_SetFromErrno(PyExc_IOError);
-		return NULL;
-	}
+	if (res < 0)
+		return posix_error();
 	Py_INCREF(Py_None);
 	return Py_None;
 }