[project @ Arch-1:robey@lag.net--2003-public%secsh--dev--1.0--patch-122]

symlink, readlink
add support for symlink command, and finish support for readlink.  (i guess
i started readlink a while ago but forgot to add the right method to the
SFTPServerInterface class.)

paramiko/sftp_server.py

@@ -324,6 +324,10 @@ class SFTPServer (BaseSFTP, SubsystemHandler):
                 self._response(request_number, CMD_NAME, 1, resp, '', SFTPAttributes())
             else:
                 self._send_status(request_number, resp)
+        elif t == CMD_SYMLINK:
+            path = msg.get_string()
+            target_path = msg.get_string()
+            self._send_status(request_number, self.server.symlink(path, target_path))
         elif t == CMD_REALPATH:
             path = msg.get_string()
             rpath = self.server.canonicalize(path)

paramiko/sftp_si.py

@@ -261,3 +261,33 @@ class SFTPServerInterface (object):
         else:
             return os.path.normpath('/' + path)
     
+    def readlink(self, path):
+        """
+        Return the target of a symbolic link (or shortcut) on the server.
+        If the specified path doesn't refer to a symbolic link, an error
+        should be returned.
+        
+        @param path: path (relative or absolute) of the symbolic link.
+        @type path: str
+        @return: the target path of the symbolic link, or an error code like
+            L{SFTP_NO_SUCH_FILE}.
+        @rtype: str I{or error code}
+        """
+        return SFTP_OP_UNSUPPORTED
+    
+    def symlink(self, path, target_path):
+        """
+        Create a symbolic link on the server, as new pathname C{path},
+        with C{target_path} as the target of the link.
+        
+        @param path: path (relative or absolute) of the symbolic link to
+            create.
+        @type path: str
+        @param target_path: path (relative or absolute) of the target for
+            this new symbolic link.
+        @type target_path: str
+        @return: an error code like C{SFTP_OK}.
+        @rtype: int
+        """
+        return SFTP_OP_UNSUPPORTED
+

tests/test_sftp.py

@@ -295,6 +295,7 @@ class SFTPTest (unittest.TestCase):
             self.assertEqual(f.readlines(), [ 'original\n' ])
             f.close()
             self.assertEqual(sftp.lstat(FOLDER + '/link.txt').st_size, 12)
+            self.assertEqual(sftp.stat(FOLDER + '/link.txt').st_size, 9)
             self.assertEqual(sftp.stat(FOLDER + '/original.txt').st_size, 9)
         finally:
             try: