IOCTL(2)                 HP Integral PC                  IOCTL(2)
     IOCTL(2)                 HP Integral PC                  IOCTL(2)
     IOCTL(2)                 HP Integral PC                  IOCTL(2)
     IOCTL(2)                 HP Integral PC                  IOCTL(2)



     NAME
     NAME
     NAME
     NAME
          ioctl - control device

     SYNOPSIS
     SYNOPSIS
     SYNOPSIS
     SYNOPSIS
          #include <sys/ioctl.h>

          ioctl(fildes, request, arg)

     DESCRIPTION
     DESCRIPTION
     DESCRIPTION
     DESCRIPTION
          Ioctl performs a variety of functions on character special
          files (devices).  The writeups of various devices in Section
          4 discuss how ioctl applies to them.

          Ioctl will fail if one or more of the following are true:

               Fildes is not a valid open file descriptor.  [EBADF]

               Fildes is not associated with a character special
               device.  [ENOTTY]

               Request or arg is not valid.  See tty (4).  [EINVAL]

     RETURN VALUE
     RETURN VALUE
     RETURN VALUE
     RETURN VALUE
          If an error has occurred, a value of -1 is returned and
          errno is set to indicate the error.

     SEE ALSO
     SEE ALSO
     SEE ALSO
     SEE ALSO
          tty(4).



























     Hewlett-Packard               - 1 -            (printed 12/12/84)