lkml.org 
[lkml]   [2003]   [May]   [10]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [RFC] new syscall to allow notification when arbitrary pids die
On Sat, May 10, 2003 at 02:29:54AM -0400, Chris Friesen wrote:

> I see two immediate uses for this. One would be to enable a "watcher"
> process which can do useful things on the death of processes which
> registered with it (logging, respawning, notifying other processes,
> etc).

Do it from user space, kill(pid, 0), check for ESRCH. I might see the
benefit of a new system call if it was synchronous (wait() semantics),
but since signal delivery is asynch anyway....
> The second would be to enable mutual
> suicide pacts between processes. (I'm not sure when I would use this, but
> it sounds kind of fun.)

Same thing, kill(pid, 0).

> Anyone have any opinions on this?

There's already a well established way to do what you want (get
non-immediate notification of process death). What benefit would your
approach give?
--
Muli Ben-Yehuda
http://www.mulix.org

[unhandled content-type:application/pgp-signature]
\
 
 \ /
  Last update: 2005-03-22 13:35    [from the cache]
©2003-2011 Jasper Spaans