From 5f32ec0a16b5a07c401493032c7402a8289a2878 Mon Sep 17 00:00:00 2001
From: Arthur de Jong <arthur@arthurdejong.org>
Date: Wed, 29 Dec 2010 21:50:17 +0000
Subject: add an experimental (currently partial) Python implementation of
 nslcd to see if we can get the same features with easier to maintain code

git-svn-id: http://arthurdejong.org/svn/nss-pam-ldapd/nss-pam-ldapd@1347 ef36b2f9-881f-0410-afb5-c4e39611909c
---
 pynslcd/tio.py | 98 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 98 insertions(+)
 create mode 100644 pynslcd/tio.py

(limited to 'pynslcd/tio.py')

diff --git a/pynslcd/tio.py b/pynslcd/tio.py
new file mode 100644
index 0000000..acba81f
--- /dev/null
+++ b/pynslcd/tio.py
@@ -0,0 +1,98 @@
+
+# tio.py - I/O functions
+#
+# Copyright (C) 2010 Arthur de Jong
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+# 02110-1301 USA
+
+import struct
+import os
+import socket
+import errno
+
+# definition for reading and writing INT32 values
+_int32 = struct.Struct('i')
+
+# FIXME: use something from config.py to determine the correct size
+_uid_t = struct.Struct('i')
+
+# FIXME: use something from config.py to determine the correct size
+_gid_t = struct.Struct('i')
+
+# FIXME: use something from config.py to determine the correct size
+_struct_timeval = struct.Struct('ll')
+
+class TIOStreamError(Exception):
+    pass
+
+class TIOStream(object):
+    """File-like object that allows reading and writing nslcd-protocol
+    entities."""
+
+    def __init__(self, conn):
+        conn.setblocking(1)
+        conn.setsockopt(socket.SOL_SOCKET, socket.SO_RCVTIMEO, _struct_timeval.pack(0, 500000))
+        conn.setsockopt(socket.SOL_SOCKET, socket.SO_SNDTIMEO, _struct_timeval.pack(60, 0))
+        self.fp = os.fdopen(conn.fileno(), 'w+b', 1024*1024)
+
+    def read(self, size):
+        return self.fp.read(size)
+
+    def read_int32(self):
+        return _int32.unpack(self.read(_int32.size))[0]
+
+    def read_uid_t(self):
+        return _uid_t.unpack(self.read(_uid_t.size))[0]
+
+    def read_gid_t(self):
+        return _gid_t.unpack(self.read(_gid_t.size))[0]
+
+    def read_string(self, maxsize=None):
+        len = self.read_int32()
+        if maxsize and len >= maxsize:
+            raise TIOStreamError()
+        return self.read(len)
+
+    def write(self, value):
+        self.fp.write(value)
+
+    def write_int32(self, value):
+        self.write(_int32.pack(value))
+
+    def write_uid_t(self, value):
+        self.write(_uid_t.pack(value))
+
+    def write_gid_t(self, value):
+        self.write(_gid_t.pack(value))
+
+    def write_string(self, value):
+        self.write_int32(len(value))
+        self.write(value)
+
+    def write_stringlist(self, value):
+        lst = tuple(value)
+        self.write_int32(len(lst))
+        for string in lst:
+            self.write_string(string)
+
+    def close(self):
+        try:
+            self.fp.close()
+        except IOError:
+            pass
+
+    def __del__(self):
+        self.close()
-- 
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