Re: more run, scheme code, and exit values questions

[Bill Sommerfeld <sommerfeld@apollo.hp.com>]

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   With a run pipeline, I'd like the final component of the
   pipeline to be a scheme proc like so:
   
   (run (| (unixcmd)
        (scheme-proc)))
   
   And I would like to return a non-zero value from the scheme-proc
   to indicate an error condition just like with a unix cmd.
   
   But it looks like run will not return the non-zero value
   for the scheme proc.

Ideally, the final form in a pipeline should be invoked in the parent
scsh process rather than in a subprocess.

The Korn shell behaves this way; the ksh script:

        sum=
        (echo one; echo two; echo three) | while read line
        do
                sum="$sum $line"
        done
        echo $sum

prints "one two three"

Scsh does not behave this way, and this complicates script writing ...


                                                - Bill




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