XTT(ADM)                             UNIX System V



     Name
          xtt - extract and print xt driver packet traces


     Syntax
          xtt [-f] [-o]


     Description
          The xtt command is a debugging tool for the  xt(HW)  driver.
          It  performs  an  XTIOCTRACE  ioctl(S)  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 tracing has not  been  configured  in
          the  driver,  or  the  standard  input is not attached to an
          xt(HW) 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.


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


     See Also
          layers(C), xtd(ADM), xts(ADM), xt(HW), ioctl(S), layers(M)


     (printed 2/15/90)                                   XTT(ADM)