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From: Alan Somers <asomers@freebsd.org>
Date: Tue, 28 Aug 2018 08:46:15 -0600
Message-ID: <CAOtMX2jA6VZZLf6cbQZsE+LVL-1ea3Jk_C0KAwjZfk_D9z-gVw@mail.gmail.com>
Subject: Re: angel(2) system call, the quest for immortality, aka kill(2) with
 SIGSTOP/SIGKILL will *not* work
To: warmwhitewolf@gmail.com
Cc: "freebsd-hackers@freebsd.org" <freebsd-hackers@freebsd.org>
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On Tue, Aug 28, 2018 at 2:59 AM Warm White Wolf <warmwhitewolf@gmail.com>
wrote:

> Greetings !
>
> I have developed a new system call, be it named angel(2),
> on Linux operating system (this is what I know), which makes
> a program invulnerable to kill(2) calls, including SIGKILL and
> SIGSTOP.
>
> The uses may involve fork() + angel(), daemon() + angel(),
> setsid() + angel(), exec*() + angel().
>
> Use the intellectual property I give you, as a gift to the BSD
> operating system, using 4- 3- 2- BSD licence. That's it, name
> me in the sources.
>
> Thank you, FreeBSD !
> You are a great Unix operating system !
>

What are the applications?  Blocking SIGKILL is pretty extreme.
-Alan