Re: help understand a script

[ZHAO Wei <zhaoway@public1.ptt.js.cn>]

Thanks a great lot!

Previously I thought this was probably caused by a combination of the 
awk macro and run macro! Thanks for pointing out the correct direction!
Thanks,
zw

stktrc wrote:
> ZHAO Wei <zhaoway@public1.ptt.js.cn> writes:
>
> > The following script. I can't understand the output which is only two
> > "yes" without "haha". I think there should be a "haha" in the
> > output. Please help me clarify! Thank you!
> >
> > #! /usr/bin/scsh \
> > -o threads -e main -s
> > !#
> >
> > (define (main ignore)
> >   (let* ((headache (lambda ()
> >                      (spawn (lambda ()
> >                               (run (begin (display "haha") (newline)))))))
> >          (watcher (lambda ()
> >                    (awk (read-line) (line) ()
> >                         (#t (display line) (newline)
> >                             (headache)
> >                             (display line) (newline))))))
> >     (run (| (echo "yes") (begin (watcher))))
> >     (sleep (* 3600 1000))))
> I believe there is a SCSH bug, but I'm not sure.  A work around is to
> add a (sleep 1) immediately after the spawn.
>
> Change this:
>
>  (spawn (lambda ()
>           (run (begin (display "haha") (newline)))))))
>
> to:
>
>  (spawn (lambda ()
>           (run (begin (display "haha") (newline)))))
>  (sleep 1)))
>
> Does this work around fix it for you?
--
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