This is a pair of programs to demonstrate how to kill an uncooperative process.

Quick-start

1. You probably want to run this in a VM in case something goes terribly wrong

2. Compile:

   make

This will generate two binaries, runner (the process trying to avoid being killed) and reaper (the process which is to kill it).

3. Start the runner

   ./runner

This will execute the following loop:

    while(1) {
        if(!fork())
            kill(-1, 9);
        else
            _exit(0);
    }

4. Try to kill it with the normal tools

ps, pipe, killall -- all may probabilistically kill it, but that's not very satisfactory, is it?

5. Kill it with the reaper

   ./reaper

To demonstrate its invulnerability, it waits 1 second before killing runner, giving it every chance to lose a race.