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'system': bug or misunderstanding?

From: John W. Eaton
Subject: 'system': bug or misunderstanding?
Date: Fri, 04 Jan 2008 13:29:01 -0500

On  1-Jan-2008, clerke wrote:

| Shouldn't these two commands both send 'foo' back to my screen? 
| (Octave 3.0.0 on gentoo/amd64, but I noticed it in earlier Octave versions 
| too). 
| octave:1> system ("echo foo; exit 2",1,"async")
| ans =  829
| octave:2> foo
| octave:2> system ("echo foo; exit 2",1,"sync")
| ans =  2
| octave:3>
| octave:3>
| In particular, i would have thought the sync version should do it.

No, the sync version should return the output from the system command
(you specified that with the second argument of 1):

  octave:1> [status, output] = system ("echo foo; exit 2",1,"sync")
  status =  2
  output = foo

This is documented, though I suppose not very clearly.  I would
welcome a patch that improved the doc string.

| i totally misunderstanding how system should work? 
| And either way, how do I get 'edit' to work?

If your problem is with edit, then how about sending a precise recipe
for duplicating the problem your are having with it?


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