From 2e659ce36f9f48abc7515f83037274fbfb1f779e Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Kristj=C3=A1n=20Valur=20J=C3=B3nsson?=
 <kristjan@ccpgames.com>
Date: Mon, 19 Jan 2009 13:10:27 +0000
Subject: [PATCH] Issue 4957 Let os.ftruncate raise OSError like documented.

---
 Lib/test/test_os.py   | 3 +--
 Modules/posixmodule.c | 2 +-
 2 files changed, 2 insertions(+), 3 deletions(-)

diff --git a/Lib/test/test_os.py b/Lib/test/test_os.py
index 2c9d9bff693..5c94d7dbf8a 100644
--- a/Lib/test/test_os.py
+++ b/Lib/test/test_os.py
@@ -570,10 +570,9 @@ 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"):
diff --git a/Modules/posixmodule.c b/Modules/posixmodule.c
index a1c344465d0..915d30d3dfb 100644
--- a/Modules/posixmodule.c
+++ b/Modules/posixmodule.c
@@ -6633,7 +6633,7 @@ posix_ftruncate(PyObject *self, PyObject *args)
 	res = ftruncate(fd, length);
 	Py_END_ALLOW_THREADS
 	if (res < 0) {
-		PyErr_SetFromErrno(PyExc_IOError);
+		posix_error();
 		return NULL;
 	}
 	Py_INCREF(Py_None);