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

The following examples show how to use com.jcraft.jsch.ChannelExec#setErrStream() . 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: vividus   File: SshExecutor.java    License: Apache License 2.0 6 votes vote down vote up
@Override
protected SshOutput executeCommand(ServerConfiguration serverConfig, Commands commands, ChannelExec channel)
        throws JSchException, IOException
{
    channel.setAgentForwarding(serverConfig.isAgentForwarding());
    SshOutput executionOutput = new SshOutput();
    try (ByteArrayOutputStream errorStream = new ByteArrayOutputStream())
    {
        channel.setCommand(commands.getJoinedCommands());
        channel.setErrStream(errorStream);
        channel.connect();
        executionOutput.setOutputStream(readChannelInputStream(channel));
        executionOutput.setErrorStream(new String(errorStream.toByteArray(), StandardCharsets.UTF_8));
        executionOutput.setExitStatus(channel.getExitStatus());
    }
    return executionOutput;
}
 
Example 3
/**
 * Runs that java app with the specified command and then takes the console output from target to host machine
 *
 * @param path
 * @param cmd
 * @throws IOException
 */
private void runJavaApp(@NotNull final String path, @NotNull final String cmd) throws IOException, RuntimeConfigurationException {
    consoleView.print(NEW_LINE + EmbeddedLinuxJVMBundle.getString("pi.deployment.build") + NEW_LINE + NEW_LINE, ConsoleViewContentType.SYSTEM_OUTPUT);
    Session session = connect(ssh.get());
    consoleView.setSession(session);
    try {
        ChannelExec channelExec = (ChannelExec) session.openChannel("exec");
        channelExec.setOutputStream(System.out, true);
        channelExec.setErrStream(System.err, true);
        List<String> commands = Arrays.asList(
                String.format("%s kill -9 $(ps -efww | grep \"%s\"| grep -v grep | tr -s \" \"| cut -d\" \" -f2)", params.isRunAsRoot() ? "sudo" : "", params.getMainclass()),
                String.format("cd %s", path),
                String.format("tar -xvf %s.tar", consoleView.getProject().getName()),
                "rm *.tar",
                cmd);
        for (String command : commands) {
            consoleView.print(EmbeddedLinuxJVMBundle.getString("pi.deployment.command") + command + NEW_LINE, ConsoleViewContentType.SYSTEM_OUTPUT);
        }
        channelExec.setCommand(LinuxCommand.builder().commands(commands).build().toString());
        channelExec.connect();
        checkOnProcess(channelExec);
    } catch (JSchException e) {
        setErrorOnUI(e.getMessage());
    }
}
 
Example 4
/**
 * 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 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;
	}
}
 
Example 8
Source Project: parallec   File: SshProvider.java    License: Apache License 2.0 4 votes vote down vote up
/**
 * Seems there are bad naming in the library the sysout is in
 * channel.getInputStream(); the syserr is in
 * ((ChannelExec)channel).setErrStream(os);
 *
 * @param channel
 *            the channel
 * @return the response on singe request
 */
public ResponseOnSingeRequest executeAndGenResponse(ChannelExec channel) {
    ResponseOnSingeRequest sshResponse = new ResponseOnSingeRequest();

    InputStream in = null;
    OutputStream outputStreamStdErr = new ByteArrayOutputStream();
    StringBuilder sbStdOut = new StringBuilder();
    try {

        in = channel.getInputStream();
        channel.setErrStream(outputStreamStdErr);

        byte[] tmp = new byte[ParallecGlobalConfig.sshBufferSize];
        while (true) {
            while (in.available() > 0) {
                int i = in.read(tmp, 0, ParallecGlobalConfig.sshBufferSize);
                if (i < 0)
                    break;
                sbStdOut.append(new String(tmp, 0, i));

            }

            if (channel.isClosed()) {
                if (in.available() > 0)
                    continue;
                sshResponse.setFailObtainResponse(false);

                // exit 0 is good
                int exitStatus = channel.getExitStatus();
                sshResponse.setStatusCodeInt(exitStatus);
                sshResponse.setStatusCode(Integer.toString(exitStatus));
                break;
            }

            Thread.sleep(ParallecGlobalConfig.sshSleepMIllisBtwReadBuffer);
        }

        sshResponse.setResponseBody(sbStdOut.toString());
        sshResponse.setErrorMessage(outputStreamStdErr.toString());
        sshResponse.setReceiveTimeNow();
    } catch (Exception t) {
        throw new RuntimeException(t);
    }

    return sshResponse;
}