Re: timeout chpst -L

[Gerrit Pape <pape@smarden.org>]

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On Mon, Feb 13, 2006 at 10:18:07PM +0200, Alex Efros wrote:
> On Mon, Feb 13, 2006 at 06:30:54PM +0200, Alex Efros wrote:
> > Is there exists some standard utility to run other process with timeout?
> > ulimit isn't suitable because it can only limit used CPU time, while I'm
> > speaking about real time.
> 
> I've just discovered `tryto`. Sadly, but looks like there some race
> condition bug in it when tryto used to run some process which exit
> very quickly. I've tried to run `tryto chpst -l`, noticed strange
> results and moved to more simple examples like `tryto true` (see
> details below).

> powerman@home ~/tmp $ for i in $(seq 1 10); do echo "i=$i"; tryto -v -t 2 bash -c 'true'; done
> i=1
> tryto: warning: child "bash" timed out. sending TERM...
> tryto: warning: child "bash" not terminated. sending KILL...
> tryto: fatal: child timed out, giving up.

Yes, it's a race, the patch below should help.  Thanks, Gerrit.

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Index: src/tryto.c
===================================================================
RCS file: /var/lib/cvs/socklog/src/tryto.c,v
retrieving revision 1.8
diff -u -r1.8 tryto.c
--- src/tryto.c	6 Feb 2005 11:36:50 -0000	1.8
+++ src/tryto.c	13 Feb 2006 20:42:13 -0000
@@ -104,6 +104,7 @@
   taia_now(&now);
   taia_uint(&deadline, timeout);
   taia_add(&deadline, &now, &deadline);
+  timeout =0;
 
   for (;;) {
     int iopausefds;