I'm trying to capture the output of diff with org-babel, but for some reason it's not working. For the files
1
a b c
2
a c b
diff 1 2 called from the command line returns
1c1
< a b c
---
> a c b
But with org-babel, nothing:
#+begin_src sh
diff 1 2
#+end_src
#+RESULTS:
The minibuffer reads "Code block produced no output". The org-babel error output window is empty. Other commands such as ls show the output as expected. I'm not familiar with org-babel.
I tried using :results output verbatim, no changes. I also tried using :results output replace as suggested here. Didn't help.
I could reproduce your problem (on OSX).
The strange thing is that executing the babel block will open the Org-babel Error Output buffer, as if something were going to STDERR.
If you add any other output after diff, results will display OK. For example,
#+begin_src sh :results output
diff 1 2
echo
#+end_src
If you force diff's results to stdout, results will also display:
#+begin_src sh :results output
diff 1 2 | cat
#+end_src