file-descriptors remain open when stop() is called

Mininet does not close all file descriptors if it is stopped by function Mininet.stop(). This is because the pipes of the Pseduo-TTY remain open when the network shuts down. Implementation of Node.startShell() opens these pipes, but they are not closed when the network is stopped:

        self.master, self.slave = pty.openpty()
        self.shell = self._popen( cmd, stdin=self.slave, stdout=self.slave, stderr=self.slave,
                                  close_fds=False )
        self.stdin = os.fdopen( self.master, 'rw' )

A possible solution for this bug could be an extension of Node.cleanup():

def cleanup( self ):
        self.shell = None 

        """close pipes of shell"""
        if self.master: 
            os.close(self.master)
            self.master = None
        if self.slave: 
            os.close(self.slave)
            self.slave = None

[cw299]

The problem is actually not the master, but stdin When both slave and stdin are closed, it works:

def cleanup( self ):
        self.shell = None 

        """close pipes of shell"""
        if self.slave: 
            os.close(self.slave)
            self.slave = None
        self.stdin.close()

[lantz]

closing - fixed in master