From bug-octave-request at bevo dot che dot wisc dot edu  Mon Aug  7 10:08:44 2000
Subject: Re: popen-pclose
From: "Stef Pillaert (KAHO)" <stef dot pillaert at kahosl dot be>
To: "bug-octave" <bug-octave at bevo dot che dot wisc dot edu>
Date: Mon, 7 Aug 2000 17:06:03 +0200

[Sorry for the late reply...]
----- Original Message -----
From: John W. Eaton <jwe at bevo dot che dot wisc dot edu>
To: Stef Pillaert <stef dot pillaert at kahosl dot be>
Cc: <bug-octave at bevo dot che dot wisc dot edu>
Sent: Monday, June 26, 2000 7:46 PM
Subject: popen-pclose


> On 22-Jun-2000, Stef Pillaert <stef dot pillaert at kahosl dot be> wrote:
>
> | To: bug-octave at bevo dot che dot wisc dot edu
> | Cc: stef
> | Subject: popen (or pclose?) errors.
> | --------
> | Bug report for Octave 2.1.30 configured for
%OCTAVE_CONF_CANONICAL_HOST_TYPE%
> |
> | Description:
> | -----------
> | I always have problems with popen-pclose
> |
> | Repeat-By:
> | ---------
> |
> | octave:2> fid=popen("ls","r")
> | fid =
> | {
> |   id = 4
> |   name = ls
> |   mode = r
> |   arch = native
> |   status = open
> | }
> | octave:3> pclose(fid)
> | ans = 0
> | octave:4> fid
> | fid =
> | {
> |   id = 4
> |   name = ls
> |   mode = r
> |   arch = native
> |   status = closed
> | }
> | octave:5> fid=popen("ls","r")
> | panic: Segmentation fault -- stopping myself...
> | attempting to save variables to `octave-core'...
> | warning: save: wrong type argument `file'
> | save to `octave-core' complete
> | Segmentation fault (core dumped)
>
> I'm unable to reproduce this with my current sources, so perhaps it
> has been fixed.
>
> jwe
I recently installed 2.1.31, and I still have the same problem. Could this
be related to the problems I also have with popen2 (see a recent bug-report
I did send a few days ago)?

Don't know if it is relevant, but neither the popen-close problem, nor the
popen2 problem happens with 2.0.16: here everything works fine...
 (but I would prefer to use the 2.1.31, because I adopted all my
.oct-functions to the 2.1.?? version...)

Thanks for your time,

Stef.



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