From mboxrd@z Thu Jan  1 00:00:00 1970
From: Eric Schulte <schulte.eric@gmail.com>
Subject: Re: Bug: babel: results switch (output vs. value) has no or wrong
 effect for sh source block [7.7 (release_7.7.107.g7a82)]
Date: Fri, 19 Aug 2011 07:33:54 -0600
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References: <CALPHr6w_hwhh7q-pGtqgHx43OUUJQpQKE+2jnLOUazD+AmzgVg@mail.gmail.com>
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To: Andras Major <andras.g.major@gmail.com>
Cc: emacs-orgmode@gnu.org

Andras Major <andras.g.major@gmail.com> writes:

> Hello, here is an example of apparently erroneous behaviour of the
> :results switch.  In this example, we use an sh block, but it also
> appears to affect other languages (will need more investigation).
>
> Example Org code:
>
> #+begin_src sh :exports output
>   echo "Hello World 1"
> #+end_src
>
> #+results:
> : Hello World 1
>
> #+begin_src sh :exports value
>   echo "Hello World 2"
> #+end_src
>
> #+results:
> : Hello World 2
>
> Am I missing something here or should the second instance really
> output something like an integer exit value from echo?
>

Hi Andr=C3=A1s,

If we did return the value of shell scripts then ":results value" would
almost always simply return 0 (or possibly an error message).  For this
reason shell code blocks do not implement value returns, but rather will
always collect results from STDOUT.

Best -- Eric

--=20
Eric Schulte
http://cs.unm.edu/~eschulte/