# This is an example of an awk script

exec awk -f Example.awk Trace.tr > out

# Example.awk
BEGIN {
   maxpac_id=0;
}
{
   evento = $1;
   tempo = $2;
   pac_id = $12;
   if ( pac_id > maxpac_id ) maxpac_id = pac_id;
   if ( ! ( pac_id in tempIn ) ) tempIn[pac_id] = tempo;
   if ( evento != "d" ) {
        if ( evento == "r" ) tempoFim[pac_id] = tempo;
   } else tempoFim[pac_id] = 0;
}
END {
  for ( pac_id = 0; pac_id <= maxpac_id + 1; pac_id++ ) {
      duracao =  tempoFim[pac_id] - tempIn[pac_id];
      if ( duracao > 0 ) printf("End-to-end delay for packet %d = %.6f s
\n", pac_id, duracao);
  }
exit 0
}