vi50_open(3)                        CLIX                        vi50_open(3)



  NAME

    vi50_open - Opens a VI50 channel

  LIBRARY

    Intergraph Device Library (libix.a)

  SYNOPSIS

    #include <sys/xio/xerr.h>

    int vi50_open(
      int channel );

  PARAMETERS

    channel
           Specifies the VI50 channel to open.

  DESCRIPTION

    The vi50_open() function opens the specified VI50 channel.  Only one
    process is allowed to open a VI50 channel at a time.  Each VI50 device is
    represented by a channel number, such that channel 0 refers to the device
    whose EVME adapter card is located in the lowest slot on the SRX bus.
    Once a process has successfully opened a channel, it may grant access to
    his children with the vi50_ioctl() call.

  RETURN VALUES

    The vi50_open() function returns a value of 0 if successful.  If not
    successful, one of the failure codes listed in the ERRORS section is
    returned.

  ERRORS

    The vi50_open() function fails if one of the following is true:

    [XIO_FAILURE]
           The system does not contain the driver needed to support the
           request.

    [VI50_INVALID_DEVICE]
           There is no hardware corresponding to the channel.

    [VI50_IN_USE]
           The channel has already been opened by a process.

  RELATED INFORMATION




  2/94 - Intergraph Corporation                                              1

  vi50_open(3)                        CLIX                        vi50_open(3)



    Functions:  vi50_close(3), vi50_ioctl(3)

    Files:  xvi50(7)



















































  2                                              Intergraph Corporation - 2/94