Background writes in csh
Esa K Viitala
esa at tglobe2.tollpost-globe
Tue Oct 2 21:31:25 AEST 1990
In article <90Oct1195212*Harald.Eikrem at elab-runit.sintef.no> Harald.Eikrem at elab-runit.sintef.no writes:
>Joe Wells <jbw at bu.edu> responding to Gordon C. Galligher <gorpong at ping.uucp>:
>================
> >
> > alias ls 'ls -FC \!* |more'
> >
> >This works fine, however sometimes it stops both tasks and puts them in
> >the background, (this is on various Suns using csh and tcsh). Typing
> >fg restarts the listing. This is really irritating, typing fg and all.
> >
> More(1) is the problem here. I have not quite figured it out, but I had a
>I suspect you're wrong, because there is a known problem with Sun's csh
>that causes this problem with pipelines in general. It's a race condition
>during the setup of the pipeline by the csh. I suspect that less works
>because it has a larger executable file and thus takes slightly longer for
>SunOS to load.
>
>I dont know. I experience this problem somewhat different on a Sun Sparc
>490 with os 4.0.3. I always use tcsh 5.12, btw. I think in nearly half
>the cases I pipe something into less, less hangs indefinitely and I have to
>suspend it with a ^Z and then fg. Nothing whatsoever gets written to my tty
>What is going on?
>
>--Harald E
Same thing on my SPARCstation 1 & Sun 3/80, it has been going for some
time now. I thought it was our "Cable Guys" causing problems on my LAN,
because they've been doing some installing. A closer look into it
reveals that I experience the same pipeline trouble as others.
Sometimes the i/o gets going in a while (in a few seconds) but it happens
I have to use ^Z + fg, too.
On the Sparcstation I run: SunOS Release 4.0.3c,
on Sun 3/80: SunOS Release 4.0.3_EXPORT
Any cure for this available?
--
Esa Viitala
TOLLPOST-GLOBE A/S, Systemavdeling, PO Box 100, N6301 ]ndalsnes, Norway
Tel: (+47 72) 21211 / 264, Fax: (+47 72) 22161 ...!mcsun!nuug!tglobe2!esa
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