Spawning A Child Process With Tty In Node.js

I am trying to do some work on a remote server using ssh--and ssh is called on the local machine from node.js A stripped down version of the script looks like this: var execSync =

Solution 1:

There's a few options:

• If you don't mind re-using stdin/stdout/stderr of the parent process (assuming it has access to a real tty) for your child process, you can use stdio: 'inherit' (or only inherit individual streams if you want) in your spawn() options.

• Create and use a pseudo-tty via the pty module. This allows you to create a "fake" tty that allows you to run programs like sudo without actually hooking them up to a real tty. The benefit to this is that you can programmatically control/access stdin/stdout/stderr.

• Use an ssh module like ssh2 that doesn't involve child processes at all (and has greater flexibility). With ssh2 you can simply pass the pty: true option to exec() and sudo will work just fine.

Solution 2:

ssh -qt user@remote.machine -- "sudo mv ./this.thing /to/here/;"

Per the ssh man page:

-t Force pseudo-terminal allocation. This can be used to execute arbitrary screen-based programs on a remote machine, which can be very useful, e.g. when implementing menu services. Multiple -t options force tty allocation, even if ssh has no local tty.

When you run ssh interactively, it has a local tty, so the "-t" option causes it to allocate a remote tty. But when you run ssh within this script, it doesn't have a local tty. The single "-t" causes it to skip allocating a remote tty. Specify "-t" twice, and it should allocate a remote tty:

ssh -qtt user@remote.machine -- "sudo mv ./this.thing /to/here/;"^^-- Note

Solution 3:

Some programs must be running tty. "child_process" library working bad when tty inputs. I have tried for docker ( docker run command like ssh need tty), with microsoft node-pty library https://github.com/microsoft/node-pty

And this is worked me.

let command = "ssh"let args = '-qt user@remote.machine -- "sudo mv ./this.thing /to/here/;"'const pty = require("node-pty");
let ssh = pty.spawn( command , args.split(" ") )
ssh.on('data', (e)=>console.log(e));
ssh.write("any_input_on_runngin_this_program");