Examples with ChannelExec com.jcraft.jsch.ChannelExec used on opensource projects

Example 6 with ChannelExec

use of com.jcraft.jsch.ChannelExec in project voltdb by VoltDB.

the class SFTPSession method exec.

public String exec(String command, int timeout) {
    ChannelExec channel = null;
    BufferedReader outStrBufRdr = null;
    BufferedReader errStrBufRdr = null;
    StringBuilder result = new StringBuilder(2048);
    try {
        try {
            channel = (ChannelExec) m_session.openChannel("exec");
        } catch (JSchException jex) {
            throw new SSHException("opening ssh exec channel", jex);
        }
        // Direct stdout output of command
        try {
            InputStream out = channel.getInputStream();
            InputStreamReader outStrRdr = new InputStreamReader(out, "UTF-8");
            outStrBufRdr = new BufferedReader(outStrRdr);
        } catch (IOException ioex) {
            throw new SSHException("geting exec channel input stream", ioex);
        }
        // Direct stderr output of command
        try {
            InputStream err = channel.getErrStream();
            InputStreamReader errStrRdr = new InputStreamReader(err, "UTF-8");
            errStrBufRdr = new BufferedReader(errStrRdr);
        } catch (IOException ioex) {
            throw new SSHException("getting exec channel error stream", ioex);
        }
        channel.setCommand(command);
        StringBuffer stdout = new StringBuffer();
        StringBuffer stderr = new StringBuffer();
        try {
            channel.connect(timeout);
            int retries = timeout / 100;
            while (!channel.isClosed() && retries-- > 0) {
                // Read from both streams here so that they are not blocked,
                // if they are blocked because the buffer is full, channel.isClosed() will never
                // be true.
                int ch;
                try {
                    while (outStrBufRdr.ready() && (ch = outStrBufRdr.read()) > -1) {
                        stdout.append((char) ch);
                    }
                } catch (IOException ioex) {
                    throw new SSHException("capturing '" + command + "' output", ioex);
                }
                try {
                    while (errStrBufRdr.ready() && (ch = errStrBufRdr.read()) > -1) {
                        stderr.append((char) ch);
                    }
                } catch (IOException ioex) {
                    throw new SSHException("capturing '" + command + "' error", ioex);
                }
                try {
                    Thread.sleep(100);
                } catch (InterruptedException ignoreIt) {
                }
            }
            if (retries < 0) {
                throw new SSHException("'" + command + "' timed out");
            }
        } catch (JSchException jex) {
            throw new SSHException("executing '" + command + "'", jex);
        }
        // In case there's still some more stuff in the buffers, read them
        int ch;
        try {
            while ((ch = outStrBufRdr.read()) > -1) {
                stdout.append((char) ch);
            }
        } catch (IOException ioex) {
            throw new SSHException("capturing '" + command + "' output", ioex);
        }
        try {
            while ((ch = errStrBufRdr.read()) > -1) {
                stderr.append((char) ch);
            }
        } catch (IOException ioex) {
            throw new SSHException("capturing '" + command + "' error", ioex);
        }
        if (stderr.length() > 0) {
            throw new SSHException(stderr.toString());
        }
        result.append(stdout.toString());
        result.append(stderr.toString());
    } finally {
        if (outStrBufRdr != null)
            try {
                outStrBufRdr.close();
            } catch (Exception ignoreIt) {
            }
        if (errStrBufRdr != null)
            try {
                errStrBufRdr.close();
            } catch (Exception ignoreIt) {
            }
        if (channel != null && channel.isConnected()) {
            // Shutdown the connection
            channel.disconnect();
        }
    }
    return result.toString();
}

Example 7 with ChannelExec

use of com.jcraft.jsch.ChannelExec in project gerrit by GerritCodeReview.

the class SshSession method exec.

@SuppressWarnings("resource")
public String exec(String command, InputStream opt) throws JSchException, IOException {
    ChannelExec channel = (ChannelExec) getSession().openChannel("exec");
    try {
        channel.setCommand(command);
        channel.setInputStream(opt);
        InputStream in = channel.getInputStream();
        InputStream err = channel.getErrStream();
        channel.connect();
        Scanner s = new Scanner(err).useDelimiter("\\A");
        error = s.hasNext() ? s.next() : null;
        s = new Scanner(in).useDelimiter("\\A");
        return s.hasNext() ? s.next() : "";
    } finally {
        channel.disconnect();
    }
}

Example 8 with ChannelExec

use of com.jcraft.jsch.ChannelExec in project gerrit by GerritCodeReview.

the class SshSession method exec2.

public InputStream exec2(String command, InputStream opt) throws JSchException, IOException {
    ChannelExec channel = (ChannelExec) getSession().openChannel("exec");
    channel.setCommand(command);
    channel.setInputStream(opt);
    InputStream in = channel.getInputStream();
    channel.connect();
    return in;
}

Example 9 with ChannelExec

use of com.jcraft.jsch.ChannelExec in project che by eclipse.

the class JschSshClient method execAndGetOutput.

private String execAndGetOutput(String command) throws JSchException, MachineException, IOException {
    ChannelExec exec = (ChannelExec) session.openChannel("exec");
    exec.setCommand(command);
    try (BufferedReader reader = new BufferedReader(new InputStreamReader(exec.getInputStream()));
        InputStream erStream = exec.getErrStream()) {
        exec.connect(connectionTimeout);
        ListLineConsumer listLineConsumer = new ListLineConsumer();
        String line;
        while ((line = reader.readLine()) != null) {
            listLineConsumer.writeLine(line);
        }
        // read stream to wait until command finishes its work
        IoUtil.readStream(erStream);
        if (exec.getExitStatus() != 0) {
            throw new MachineException(format("Error code: %s. Error: %s", exec.getExitStatus(), IoUtil.readAndCloseQuietly(exec.getErrStream())));
        }
        return listLineConsumer.getText();
    } finally {
        exec.disconnect();
    }
}

Example 10 with ChannelExec

use of com.jcraft.jsch.ChannelExec in project che by eclipse.

the class JschSshClient method execAndGetCode.

private int execAndGetCode(String command) throws JSchException, IOException {
    ChannelExec exec = (ChannelExec) session.openChannel("exec");
    exec.setCommand(command);
    try (InputStream inStream = exec.getInputStream();
        InputStream erStream = exec.getErrStream()) {
        exec.connect(connectionTimeout);
        // read streams to wait until command finishes its work
        IoUtil.readStream(inStream);
        IoUtil.readStream(erStream);
    } finally {
        exec.disconnect();
    }
    return exec.getExitStatus();
}