使用python和paramiko在交互式远程shell中运行commnad

Posted 2021-02-26

It is necessary on occasion to execute a command in interactive shell. (I needed to to get access to some env vars... ) While there are many way to accomplish this I opted to run my cmd in interactive mode.
To do so I had to write this little wrapper snippet and figured it might be useful for someone else.

def interExecute(host,port,username,password,cmd):
        """Execute the given commands in an interactive shell."""
        transport = paramiko.Transport((host, port))            
        transport.connect(username = username, password = password)
        chan = paramiko.transport.open_session()
        chan.setblocking(0)
        chan.invoke_shell()
 
        out = ''
 
        chan.send(cmd+'
')
 
        tCheck = 0
 
        # Wait for it.....
        while not chan.recv_ready():
            time.sleep(10)
            tCheck+=1
            if tCheck >= 6:
                print 'time out'#TODO: add exeption here 
                return False
        out = chan.recv(1024)
 
        return out