Index: Modules/posixmodule.c
===================================================================
--- Modules/posixmodule.c	(revision 74738)
+++ Modules/posixmodule.c	(working copy)
@@ -2001,9 +2013,11 @@
 static PyObject *
 posix_getcwdu(PyObject *self, PyObject *noargs)
 {
-	char buf[1026];
-	char *res;
-
+	int bufsize_incr = 1024;
+	int bufsize = 0;
+	char *tmpbuf = null;
+	char *res = null;
+	PyObject *dynamic_return;
 #ifdef MS_WINDOWS
 	DWORD len;
 	wchar_t wbuf[1026];
@@ -2034,15 +2048,27 @@
 #endif /* MS_WINDOWS */
 
 	Py_BEGIN_ALLOW_THREADS
+	do {
+		bufsize = bufsize + bufsize_incr;
+		tmpbuf = malloc(bufsize);
+		if(tmpbuf == null)
+			break;
 #if defined(PYOS_OS2) && defined(PYCC_GCC)
-	res = _getcwd2(buf, sizeof buf);
+		res = _getcwd2(tmpbuf, bufsize);
 #else
-	res = getcwd(buf, sizeof buf);
+		res = getcwd(tmpbuf, bufsize);
 #endif
+		if (res == NULL) {
+			free(tmpbuf);
+		}
+	} while ((res == NULL) && (errno == ERANGE));
 	Py_END_ALLOW_THREADS
-	if (res == NULL)
+	if (res == NULL) {
 		return posix_error();
-	return PyUnicode_Decode(buf, strlen(buf), Py_FileSystemDefaultEncoding,"strict");
+	}
+	dynamic_return = PyUnicode_Decode(tmpbuf, strlen(tmpbuf), Py_FileSystemDefaultEncoding,"strict");
+	free(tmpbuf);
+	return dynamic_return;
 }
 #endif /* Py_USING_UNICODE */
 #endif /* HAVE_GETCWD */