How to send a command while ssh_exec_wait is not finnished. about ssh HOT 3 CLOSED

I don't understand what you are asking. Can you please include example R code?

from ssh.

Sorry if I wasn't clear. What I want is to operate the remote data in EMR with Spark Shell.

Typically, I use xshell to connect to the EMR server, after connected, the to the prompt symbol is [user@ip]$ , here I can execute the linux command interactively. when I input command SCALAstart (like input python in windows cmd and enable python command) , it will be shift to the Spark shell with prompt symbol scala>, and then I can input Scala code interactively, such as var i=1.

When I used ssh package, it can connect to the server successfully.

library(ssh)
session<-ssh_connect("user@ip",keyfile="e:\\user.pem")

Then I can execute the linux command successfully.

ssh_exec_wait(session, command = "date")

But when I execute the start command of spark shell,

ssh_exec_wait(session,command="SCALAstart")

it start up successfully and end with the symbol scala> wating for scala codes.

but I can not send new command to the server interactively. So, I guess it is because that the command ssh_exec_wait is just waiting the end mark of command SCALAstar (A red stop button is in top right conner of r studio consol window), and new command of Scala code is not allowed to input.

#invalid code after ssh_exec_wait(session,command="SCALAstart")
ssh_exec_wait(session, command = "var i=1")
var i=1
ssh_exec_wait(session, command = ":quit")
#in xshell, the codes below is valid after command: SCALAstart
var i=1
:quit

My question is "Can I input the scala code interactively during command SCALAstart is not finished? " like xshell, running on the spark shell prompt scala>, when SCALAstart running on the linux prompt[user@ip]$". (same as running python code under python prompt>>> with "python interpreter command" is just running on windows CMD prompt> . )

from ssh.

Currently you can only run scripts, there is no way to setup an interactive shell. I'm actually surprised SCALAstart doesn't recognize that it is in a non-interactive shell and hence freezes waiting for user input. I'll open a new issue for this: #23 but I won't be able to look at it any time soon.

from ssh.