cs(7)                               CLIX                               cs(7)



  NAME

    cs - Console interface driver

  DESCRIPTION

    The cs driver is the console interface driver.  The cs driver supports the
    features described in termio.

    The cs driver automatically configures the system console at boot time.
    On Intergraph graphic workstations, the console is a window on the
    graphics screen.  On 200-, 2000-, and 6000-series servers, the console is
    connected to serial port 0 and on 300- and 400-series servers, the console
    is connected to serial port 2.

    The ioctl() function ioctl(fildes, request, arg) can be used with cs,
    where fildes is the file descriptor returned by open(), and request is one
    of the ioctl() requests defined in <sys/cs.h>.  Currently only the
    following request is defined for the console driver:

    REMOTE_DIAG
           Quits remote diagnostic services.  The console is moved back to the
           local console and the modem hangs up the phone.  The variable errno
           is set to ENXIO if not in a remote diagnostic session.

    A remote diagnostic session may be started at boot time.  When in the
    remote diagnostic session, the console is configured to be an aux port
    which has a modem connected.  A second device is used as a local console.
    This can be either a second aux port or the standard console window (for
    machines with graphics).  The /dev/localcs file is a device that can be
    used to communicate between the remote console and the local console.  All
    data displayed on the remote console will also be displayed on the local
    console.  The localcs driver supports the features described in termio(7).
    When performing a read() from localcs, data comes from the local console.
    When performing a write() to /dev/localcs, data is displayed on the local
    console.  The open() function fails, with errno set to ENXIO if the system
    is not in a remote diagnostic session.

  FILES

    /dev/console   System console device.

    /dev/localcs   Device that communicates between remote and local consoles.

  RELATED INFORMATION

    Files:  aux(7), termio(7)







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