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Subject:	Re: Issue with system command in Octave 4.0.0 GUI
To:	cygwin AT cygwin DOT com
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From:	Marco Atzeri <marco DOT atzeri AT gmail DOT com>
Message-ID:	<5626438A.2080006@gmail.com>
Date:	Tue, 20 Oct 2015 15:37:14 +0200
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On 19/10/2015 21:11, James R. Phillips wrote:
> Hello,
>
> The new Octave 4.0.0 GUI is very impressive. I did discover an issue, though.
>
> Using the system command with 'bash" as an argument, i.e,
>
>> system('bash')
>
> should yield a bash command prompt in the command window. However, this causes the command line interface to hang.
>
> This works in the command-line version..
>
> The system command with other legal bash commands (e.g. 'ls') seems to work fine in the GUI.
>
> I am running 64-bit Cygwin. Output of cygcheck attached.
>
> Regards
>
> James R. Phillips
>

Hi James,
yes, your old package is grown up a bit.

About your question, I am not so sure that it is expected to work.
https://www.gnu.org/software/octave/doc/interpreter/Controlling-Subprocesses.html

The bash process is not run in a proper terminal so it has no access to 
command inputs, while octave is waiting for its termination.

If you use system("xterm"), than bash works in a separate terminal
and octave does not hang.

Regards
Marco





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