# We are in the only process.
printf STDERR ("pid = %d\n", $$) if $DEBUG;

$pid = fork();
die("fork failed!\n") unless (defined($pid));
if (!fork())
{
   # We are in the child process.
   printf STDERR ("child pid = %d\n", $$) if $DEBUG;

   exec(...);
   # We'll never reach here if exec() worked.

   # Avoiding die(); we don't want eval{} catching this.
   print STDERR "exec failed!\n";
   exit(2);
}

# We are in the parent.
printf STDERR ("parent (pid = %d) successfully spawned child (pid = %d).\n", $$, $pid) if $DEBUG;