Date:        Sun, 27 Aug 2000 00:30:32 -0400 (EDT)
    From:        James Chacon <jchacon@genuity.net>
    Message-ID:  <200008270430.AAA11118@dragon.tools.gtei.net>

  | There's already code sprinkled throughout the kernel to treat init special
  | so why not make it immune to this as well?

It is, and has been since well before NetBSD existed.   init ignores
any signal whose current state is SIG_DFL (and any which is SIG_IGN of
course).   All that is left are those that it has arranged to catch.

Since SIGKILL can't be changed from SIG_DFL, init always ignores that one,
the only effect of "kill -9 1" is that (if the kernel has DIAGNOSTIC set)
it prints "Process (pid 1) got signal 9" (on the console & via syslog).

kre