How to figure out if a command executed using JSch in Java has successfully completed?

Question

I am not able to figure out whether a command has completed its execution or not before sending the next command using the JSch library in Java.

Code snippet

// Opens a new channel of type 'exec'
Channel channel = sesConnection.openChannel("exec"); 
// sets the command to be executed
((ChannelExec) channel).setCommand(command); 
// Gets an input stream for this channel
InputStream commandOutput = channel.getInputStream(); 
channel.connect();

user_850848 · Answer

When executing commands, there are two sources you can use to decide if the command failed:

Command exit code. That's Channel.getExitStatus in JSch. Note that the method returns an actual exit code, once the command finishes only.
Command error output. That's Channel.getExtInputStream in JSch.

For an example how to read both, see How to read JSch command output?

How to figure out if a command executed using JSch in Java has successfully completed?

1 Answers