+ # we used to do this as a nice pipeline, but the problem is that $r fails to
+ # to be set properly if the tcpdump core dumps.
+ $r = system "../tcpdump 2>/dev/null -n -r $input $options >NEW/$output";
+ if($r == 0x100) {
+ # this means tcpdump exited with code 1.
+ open(OUTPUT, ">>"."NEW/$output") || die "fail to open $output\n";
+ printf OUTPUT "EXIT CODE %08x\n", $r;
+ close(OUTPUT);
+ $r = 0;
+ }
+ if($r == 0) {
+ $r = system "cat NEW/$output | diff $output - >DIFF/$output.diff";
+ }
+ #print sprintf("END: %08x\n", $r);