pylibfdt: Support setting the name of a node

Add a method to call fdt_set_name().

Signed-off-by: Simon Glass <sjg@chromium.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>

pylibfdt/libfdt.i

@@ -535,6 +535,23 @@ class Fdt:
         """
         return check_err(fdt_parent_offset(self._fdt, nodeoffset), quiet)
 
+    def set_name(self, nodeoffset, name, quiet=()):
+        """Set the name of a node
+
+        Args:
+            nodeoffset: Node offset of node to update
+            name: New node name (string without \0)
+
+        Returns:
+            Error code, or 0 if OK
+
+        Raises:
+            FdtException if no parent found or other error occurs
+        """
+        if chr(0) in name:
+            raise ValueError('Property contains embedded nul characters')
+        return check_err(fdt_set_name(self._fdt, nodeoffset, name), quiet)
+
     def setprop(self, nodeoffset, prop_name, val, quiet=()):
         """Set the value of a property
 

tests/pylibfdt_tests.py

@@ -465,6 +465,21 @@ class PyLibfdtTests(unittest.TestCase):
         self.assertEquals(TEST_STRING_3,
                           self.fdt.getprop(node, prop).as_str())
 
+    def testSetName(self):
+        """Test that we can update a node name"""
+        node = self.fdt.path_offset('/subnode@1')
+        old_val = self.fdt.get_name(node)
+        self.fdt.set_name(node, 'test')
+        self.assertEquals('test', self.fdt.get_name(node))
+
+        with self.assertRaises(ValueError) as e:
+            self.fdt.set_name(node, 'some\0name')
+        self.assertIn('embedded nul', str(e.exception))
+
+        with self.assertRaises(ValueError) as e:
+            self.fdt.set_name(node, 'name\0')
+        self.assertIn('embedded nul', str(e.exception))
+
 
 if __name__ == "__main__":
     unittest.main()