[linux-audio-dev] Re: [Jackit-devel] [ANN] das_watchdog 0.0.1 and jack_capture v0.2.3

[Florian Schmidt]

On Sun, 12 Feb 2006 20:46:08 -0800 (PST)
"Kjetil S. Matheussen" <kjetil at ccrma.stanford.edu> wrote:

> Das_Watchdog
> ============
> 
> ABOUT
> -----
> Das_Watchdog is a program heavily and shamefully inspired by the 
> rt_watchdog program made by Florian Schmidt: 
> http://tapas.affenbande.org/?page_id=38

Hehe, why shamefully? This is open source, baby. So i'm glad there's
some alternative to my messy code ;) And btw: the two programs are still
a bit different. rt_watchdog is a daemon. I have wondered about how to
make it known to the user that it has kicked in. The only solution i
found was to write into the logs. Opening an xwindow is an interesting
solution. Does linux maybe even have a standardized way for this kinda
stuff?

> However, this one has some improvements:
> 
> 1. It works with 2.4 kernels as well as 2.6. (well, at least I think it
>     works with 2.6...)
> 2. Instead of permanently setting all realtime processes to run
>     non-realtime, das_watchdog only sets them temporary.
> 3. When the watchdog kicks in, an X window should pop up that tells you
>     whats happening. (just close it after reading the message).
> 
> 
> INSTALLING
> ----------
> make
> cp das_watchdog /usr/local/sbin/
> echo '/usr/local/sbin/das_watchdog & >/dev/null' >>/etc/rc.local

This assumes an initscript style that's not used on all linux systems. 

> reboot

Also i wonder: Is it safe to simply use a static int as "event counter"?
Might this not fail on SMP boxes?

I think i make a similar mistake by using a volatile int (not as a
counter, just as a exit state indicator) instead. Any gurus care to
comment?

Flo

-- 
Palimm Palimm!
http://tapas.affenbande.org


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