Java Code Examples for com.jcraft.jsch.ChannelExec#setInputStream()

The following examples show how to use com.jcraft.jsch.ChannelExec#setInputStream() . These examples are extracted from open source projects. You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may check out the related API usage on the sidebar.
Example 1
/**
 * Connect to a remote host via SSH and execute a command.
 * 
 * @param host
 *          Host to connect to
 * @param user
 *          User to login with
 * @param password
 *          Password for the user
 * @param command
 *          Command to execute
 * @return The result of the command execution
 */
private Result executeSshCommand(final String host, final String user,
    final String password, final String command) {
  
  StringBuilder result = new StringBuilder();
  
  try {
    JSch jsch = new JSch();
    Session session = jsch.getSession(user, host, 22);
    session.setUserInfo(createUserInfo(password));
    session.connect(5000);

    ChannelExec channel = (ChannelExec) session.openChannel("exec");
    channel.setCommand(command);
    channel.setInputStream(null);
    channel.setErrStream(System.err);
    InputStream in = channel.getInputStream();

    channel.connect();

    byte[] tmp = new byte[1024];
    while (true) {
      while (in.available() > 0) {
        int i = in.read(tmp, 0, 1024);
        if (i < 0)
          break;
        result.append(new String(tmp, 0, i));
      }
      if (channel.isClosed()) {
        break;
      }
    }
    channel.disconnect();
    session.disconnect();
  } catch (Exception jex) {
    return createResult(Result.Status.ERROR, jex.getMessage());
  }
 
  return createResult(Result.Status.OK, result.toString());
}
 
Example 2
Source Project: ats-framework   File: JschSshClient.java    License: Apache License 2.0 5 votes vote down vote up
/**
 *
 * @param command SSH command to execute
 * @return the exit code
 */
public int execute( String command, boolean waitForCompletion ) {

    try {
        this.command = command;

        execChannel = (ChannelExec) session.openChannel("exec");

        execChannel.setCommand(command);
        execChannel.setInputStream(null);
        execChannel.setPty(true); // Allocate a Pseudo-Terminal. Thus it supports login sessions. (eg. /bin/bash
                                  // -l)

        execChannel.connect(); // there is a bug in the other method channel.connect( TIMEOUT );

        stdoutThread = new StreamReader(execChannel.getInputStream(), execChannel, "STDOUT");
        stderrThread = new StreamReader(execChannel.getErrStream(), execChannel, "STDERR");
        stdoutThread.start();
        stderrThread.start();

        if (waitForCompletion) {

            stdoutThread.getContent();
            stderrThread.getContent();
            return execChannel.getExitStatus();
        }

    } catch (Exception e) {

        throw new JschSshClientException(e.getMessage(), e);
    } finally {

        if (waitForCompletion && execChannel != null) {
            execChannel.disconnect();
        }
    }

    return -1;
}
 
Example 3
/**
 * Connect to a remote host via SSH and execute a command.
 * 
 * @param host
 *          Host to connect to
 * @param user
 *          User to login with
 * @param password
 *          Password for the user
 * @param command
 *          Command to execute
 * @return The result of the command execution
 */
private Result executeSshCommand(final String host, final String user,
    final String password, final String command) {
  
  StringBuilder result = new StringBuilder();
  
  try {
    JSch jsch = new JSch();
    Session session = jsch.getSession(user, host, 22);
    session.setUserInfo(createUserInfo(password));
    session.connect(5000);

    ChannelExec channel = (ChannelExec) session.openChannel("exec");
    channel.setCommand(command);
    channel.setInputStream(null);
    channel.setErrStream(System.err);
    InputStream in = channel.getInputStream();

    channel.connect();

    byte[] tmp = new byte[1024];
    while (true) {
      while (in.available() > 0) {
        int i = in.read(tmp, 0, 1024);
        if (i < 0)
          break;
        result.append(new String(tmp, 0, i));
      }
      if (channel.isClosed()) {
        break;
      }
    }
    channel.disconnect();
    session.disconnect();
  } catch (Exception jex) {
    return createResult(Result.Status.ERROR, jex.getMessage());
  }
 
  return createResult(Result.Status.OK, result.toString());
}
 
Example 4
Source Project: parallec   File: SshProvider.java    License: Apache License 2.0 5 votes vote down vote up
/**
  * Session connect generate channel.
  *
  * @param session
  *            the session
  * @return the channel
  * @throws JSchException
  *             the j sch exception
  */
 public Channel sessionConnectGenerateChannel(Session session)
         throws JSchException {
 	// set timeout
     session.connect(sshMeta.getSshConnectionTimeoutMillis());
     
     ChannelExec channel = (ChannelExec) session.openChannel("exec");
     channel.setCommand(sshMeta.getCommandLine());

     // if run as super user, assuming the input stream expecting a password
     if (sshMeta.isRunAsSuperUser()) {
     	try {
             channel.setInputStream(null, true);

             OutputStream out = channel.getOutputStream();
             channel.setOutputStream(System.out, true);
             channel.setExtOutputStream(System.err, true);
             channel.setPty(true);
             channel.connect();
             
          out.write((sshMeta.getPassword()+"\n").getBytes());
          out.flush();
} catch (IOException e) {
	logger.error("error in sessionConnectGenerateChannel for super user", e);
}
     } else {
     	channel.setInputStream(null);
     	channel.connect();
     }

     return channel;

 }
 
Example 5
Source Project: commons-vfs   File: SftpFileSystem.java    License: Apache License 2.0 5 votes vote down vote up
/**
 * Executes a command and returns the (standard) output through a StringBuilder.
 *
 * @param command The command
 * @param output  The output
 * @return The exit code of the command
 * @throws JSchException       if a JSch error is detected.
 * @throws FileSystemException if a session cannot be created.
 * @throws IOException         if an I/O error is detected.
 */
private int executeCommand(final String command, final StringBuilder output) throws JSchException, IOException {
    final ChannelExec channel = (ChannelExec) getSession().openChannel("exec");
    try {
        channel.setCommand(command);
        channel.setInputStream(null);
        try (final InputStreamReader stream = new InputStreamReader(channel.getInputStream())) {
            channel.setErrStream(System.err, true);
            channel.connect(connectTimeoutMillis);

            // Read the stream
            final char[] buffer = new char[EXEC_BUFFER_SIZE];
            int read;
            while ((read = stream.read(buffer, 0, buffer.length)) >= 0) {
                output.append(buffer, 0, read);
            }
        }

        // Wait until the command finishes (should not be long since we read the output stream)
        while (!channel.isClosed()) {
            try {
                Thread.sleep(SLEEP_MILLIS);
            } catch (final Exception ee) {
                // TODO: swallow exception, really?
            }
        }
    } finally {
        channel.disconnect();
    }
    return channel.getExitStatus();
}
 
Example 6
/**
 *
 * {@link  org.apache.commons.vfs2.provider.sftp.SftpFileSystem#executeCommand(java.lang.String, java.lang.StringBuilder) }
 */
private int executeCommand( String command, StringBuilder output ) throws JSchException, IOException {
  this.ensureSession();
  ChannelExec channel = (ChannelExec) this.session.openChannel( "exec" );
  channel.setCommand( command );
  channel.setInputStream( (InputStream) null );
  InputStreamReader stream = new InputStreamReader( channel.getInputStream() );
  channel.setErrStream( System.err, true );
  channel.connect();
  char[] buffer = new char[128];

  int read;
  while ( ( read = stream.read( buffer, 0, buffer.length ) ) >= 0 ) {
    output.append( buffer, 0, read );
  }

  stream.close();

  while ( !channel.isClosed() ) {
    try {
      Thread.sleep( 100L );
    } catch ( Exception exc ) {
      log.logMinimal( "Warning: Error session closing. " + exc.getMessage() );
    }
  }

  channel.disconnect();
  return channel.getExitStatus();
}
 
Example 7
Source Project: BigDataScript   File: Ssh.java    License: Apache License 2.0 5 votes vote down vote up
/**
 * Connect via ssh and execute a command (e.g. execute "ls -al" in remote host)
 *
 * Reference: http://www.jcraft.com/jsch/examples/Exec.java.html
 */
public String exec(String command) {
	// Open ssh session
	try {
		Gpr.debug("COMMAND: " + command);
		channel = connect("exec", command);
		ChannelExec chexec = (ChannelExec) channel;
		chexec.setInputStream(null);
		chexec.setPty(true); // Allocate pseudo-tty (same as "ssh -t")

		if (debug) {
			// Show only in debug mode
			chexec.setErrStream(System.err);
			chexec.setOutputStream(System.out);
		}

		// Connect channel
		chexec.connect();

		// Read input
		String result = readChannel(true);

		disconnect(false); // Disconnect and get exit code
		return result;
	} catch (Exception e) {
		e.printStackTrace();
		return null;
	}
}