int bufferSize;
        if (initialCapacity > 0 && initialCapacity <= MAX_BUF_SIZE) {
            bufferSize = initialCapacity;
        } else {
            bufferSize = DEFAULT_BUF_SIZE;
        }
        char[] buf = new char[bufferSize];
        int size = 0;
        int len;
        try {
            while ((len = reader.read(buf, size, bufferSize - size)) != -1) {

     * @return The buffer size
     */
    public int getBufferSize() {
        return bufferSize;
    }

    /**
     * Sets the buffer size for data transfers.
     *
     * @param bufferSize The buffer size
     */
    public void setBufferSize(final int bufferSize) {
        this.bufferSize = bufferSize;
    }

    /**
     * Gets the local IP address for passive mode FTP.
     *

     *
     * @param sessionId unique identifier for the process session
     * @param cmdList list of command and arguments to execute
     * @param pbCall callback to configure the ProcessBuilder
     * @param bufferSize size of the buffer for process output
     * @param outputCallback callback to handle process output lines
     * @return JobProcess representing the started process