Android™
Android™
Set a TTY Mode for an SSH PTY Request
See more SSH Examples
Demonstrates the Chilkat Ssh.SetTtyMode method, which adds or updates one TTY mode to be included in a later SendReqPty request. The first argument is the mode name and the second is its integer value. Call it once per mode, before requesting the PTY.
Background: TTY modes are the terminal settings a PTY is created with — the same knobs
stty exposes. The classic use is SetTtyMode("ECHO", 0), which stops the terminal from echoing input; that is how a password prompt keeps typed characters off the screen. Modes accumulate on the object and are sent with the next PTY request.Chilkat Android™ Downloads
// Important: Don't forget to include the call to System.loadLibrary
// as shown at the bottom of this code sample.
package com.test;
import android.app.Activity;
import com.chilkatsoft.*;
import android.widget.TextView;
import android.os.Bundle;
public class SimpleActivity extends Activity {
private static final String TAG = "Chilkat";
// Called when the activity is first created.
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
boolean success = false;
// Demonstrates the Ssh.SetTtyMode method, which adds or updates one TTY mode to be included in
// a later SendReqPty request. The 1st argument is the mode name and the 2nd is its integer
// value. Call it once per mode, before SendReqPty.
CkSsh ssh = new CkSsh();
int sshPort = 22;
success = ssh.Connect("ssh.example.com",sshPort);
if (success == false) {
Log.i(TAG, ssh.lastErrorText());
return;
}
// Normally you would not hard-code the password in source. You should instead obtain it
// from an interactive prompt, environment variable, or a secrets vault.
String password = "mySshPassword";
success = ssh.AuthenticatePw("mySshLogin",password);
if (success == false) {
Log.i(TAG, ssh.lastErrorText());
return;
}
// Open a session channel. A negative return value indicates failure.
int channelNum = ssh.OpenSessionChannel();
if (channelNum < 0) {
Log.i(TAG, ssh.lastErrorText());
return;
}
// Request that the allocated terminal not echo input.
success = ssh.SetTtyMode("ECHO",0);
if (success == false) {
Log.i(TAG, ssh.lastErrorText());
return;
}
// The modes set above are included in the PTY request.
success = ssh.SendReqPty(channelNum,"xterm",80,24,0,0);
if (success == false) {
Log.i(TAG, ssh.lastErrorText());
return;
}
success = ssh.SendReqShell(channelNum);
if (success == false) {
Log.i(TAG, ssh.lastErrorText());
return;
}
ssh.Disconnect();
}
static {
System.loadLibrary("chilkat");
// Note: If the incorrect library name is passed to System.loadLibrary,
// then you will see the following error message at application startup:
//"The application <your-application-name> has stopped unexpectedly. Please try again."
}
}