I'd think that this is expected behavior. "top" needs a Terminal emulation in order to move the cursor around etc -- but ChannelExec just provides a raw input and output stream without terminal emulation.
You'll need ChannelShell if you want to run top. And, a Terminal emulation connected to your Streams such as PuTTY or the Terminal component from our Eclipse Open Source project: http://www.eclipse.org/dsdp/tm/ Cheers, -- Martin Oberhuber, Senior Member of Technical Staff, Wind River Target Management Project Lead, DSDP PMC Member http://www.eclipse.org/dsdp/tm > -----Original Message----- > From: Amol Kulkarni [mailto:[EMAIL PROTECTED] > Sent: Wednesday, September 24, 2008 10:28 AM > To: [email protected] > Subject: [JSch-users] ChannelExec unable to execute top command > > Hi, > > I want to execute system command using ChannelExec on remote Linux > machine. I am not able to execute "top" command. I am able to execute > "top -b" (batch mode) command properly. I want to use ChannelExec to > avoid getting garbage characters that I receive when I use > ChannelShell. > On the error stream, it writes the following: > > TERM environment variable not set. > > Here is the sample application: > > package com.appperfect.common.main; > > import java.io.BufferedReader; > import java.io.InputStreamReader; > import java.io.OutputStream; > > import com.jcraft.jsch.Channel; > import com.jcraft.jsch.ChannelExec; > import com.jcraft.jsch.ChannelShell; > import com.jcraft.jsch.JSch; > import com.jcraft.jsch.Logger; > import com.jcraft.jsch.Session; > import com.jcraft.jsch.UserInfo; > > public class SSHSample > { > private static class MyUserInfo implements UserInfo > { > private String passwd; > > MyUserInfo(String passwd) > { > this.passwd = passwd; > } > > public String getPassword() > { > return passwd; > } > > public boolean promptYesNo(String str) > { > return true; > } > > public String getPassphrase() > { > return null; > } > > public boolean promptPassphrase(String message) > { > return true; > } > > public boolean promptPassword(String message) > { > return true; > } > > public void showMessage(String message) > { > } > } > > > > public static void main(String[] args) > { > if(args.length != 4) > { > System.out.println("Usage : SSHSample > hostName UserName Password Type"); > System.exit(0); > } > > final String hostName = args[0]; > final String userName = args[1]; > final String password = args[2]; > final String channelTye = args[3]; > > JSch.setLogger(new Logger() > { > > public boolean isEnabled(int level) > {return true;} > > public void log(int level, String message) { > System.out.println(message); > } > }); > > final String command = "top"; > final JSch jsch = new JSch(); > Session session = null; > Channel channel = null; > boolean exec = channelTye.equals("exec"); > try > { > session = jsch.getSession(userName, > hostName, 22); > session.setUserInfo(new MyUserInfo(password)); > session.setDaemonThread(false); > session.connect(); > channel = session.openChannel(channelTye); > OutputStream os = channel.getOutputStream(); > BufferedReader lineReader = new > BufferedReader(new > InputStreamReader(channel.getInputStream())); > if (exec) > { > > ((ChannelExec)channel).setErrStream(System.err); > > ((ChannelExec)channel).setCommand(command); > } > channel.connect(); > if (!exec) > { > > os.write("PS1=\"MY_PROMPT>\"".getBytes()); > os.write("\n".getBytes()); > os.write("TERM=ansi".getBytes()); > os.write("\n".getBytes()); > os.write(command.getBytes()); > os.write("\n".getBytes()); > os.flush(); > } > Thread.sleep(2000); > while (lineReader.ready()) > { > > System.out.println(lineReader.readLine()); > if (!lineReader.ready()) > { > Thread.sleep(2000); > } > } > if(channel.isClosed()) > { > System.out.println("exit-status: " + > channel.getExitStatus()); > } > channel.disconnect(); > } > catch (Exception e) > { > e.printStackTrace(System.out); > } > finally > { > if (session != null) > { > session.disconnect(); > } > } > > > } > } > > > Note, when we run just a top command it is not started in "batch" > mode. Any idea how handle this case. If ChannelShell is the only way, > then how to get rid of garbage (formatting) characters. > > > Thanks & Regards, > Amol > > -------------------------------------------------------------- > ----------- > This SF.Net email is sponsored by the Moblin Your Move > Developer's challenge > Build the coolest Linux based applications with Moblin SDK & > win great prizes > Grand prize is a trip for two to an Open Source event > anywhere in the world > http://moblin-contest.org/redirect.php?banner_id=100&url=/ > _______________________________________________ > JSch-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/jsch-users > ------------------------------------------------------------------------- This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/ _______________________________________________ JSch-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/jsch-users
