def send(self, content):
try:<EOL><INDENT>self.process.stdin.write(content)<EOL><DEDENT>except IOError as e:<EOL><INDENT>raise ProxyCommandFailure("<STR_LIT:U+0020>".join(self.cmd), e.strerror)<EOL><DEDENT>return len(content)<EOL>
Write the content received from the SSH client to the standard
input of the forked command.

:param str content: string to be sent to the forked command