xtt(1M)            UNIX System V(Layers Windowing Utilities)            xtt(1M)


NAME
      xtt - extract and print xt driver packet traces

SYNOPSIS
      xtt [-f] [-o]

DESCRIPTION
      The xtt command is a debugging tool for the xt(7) driver.  It performs an
      XTIOCTRACE ioctl(2) call on its standard input file to turn on tracing
      and extract the circular packet trace buffer for the attached group of
      channels.  This call will fail if the standard input is not attached to
      an active xt(7) channel.  The packets are printed on the standard output.

      The optional flags are:

      -f    Causes a ``formfeed'' character to be put out at the end of the
            output, for the benefit of page-display programs.

      -o    Turns off further driver tracing.

DIAGNOSTICS
      Returns 0 upon successful completion, 1 otherwise.

NOTES
      If driver tracing has not been turned on for the terminal session by
      invoking layers(1) with the -t option, xtt will not generate any output
      the first time it is executed.

SEE ALSO
      layers(1) in the User's Reference Manual
      xts(1M), ioctl(2), xtproto(5)
      xt(7) in the Programmer's Guide: STREAMS






















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