xtt(1M)           MISC. REFERENCE MANUAL PAGES            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 pro-
          grams.

     -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(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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