In article <20051128130306.GJ1943@NetBSD.org>,
Emmanuel Dreyfus  <manu@netbsd.org> wrote:
>Hi
>
>Linux's exit_group system call is meant to exit a whole group of processes. 
>In order to emulate it correctly, I must be able to cause a process to exit
>from another process. 
>
>How could this be done correctly? I tried sending SIGKILL to the members
>of the program group, but that does not work very well, as it fires an
>unwanted SIGCHLD to the parent. 
>
>Calling sys_exit(l, v, retval) within the context of a lwp different than
>l does not work. What alternative do I have?

If it does not need to exit immediately, you can set a flag in the process
struct and have it exit the next time it gets rescheduled.

christos