def METHOD_NAME(cmd, args=''):
    pipein, pipeout = os.popen4('%s %s' % (cmd, args))
    try:
        firstline = pipeout.readline()
        if (re.search(r'(not recognized|No such file|not found)', firstline,
                      re.IGNORECASE)):
            raise IOError('%s must be on your system path.' % cmd)
        output = firstline + pipeout.read()
    finally:
        pipeout.close()
    return output