[Gambas-user] Capricious Shell instruction

[Tobias Boege]

On Sun, 06 Jan 2013, Beno?t Minisini wrote:
> Le 06/01/2013 01:40, Tobias Boege a ?crit :
> > Hi Benoit,
> >
> > we came across some strange symptoms with the Shell instruction. Namely, the
> > amount of output is quite different depending on
> >
> > a) whether a Process is created or the Shell ... To syntax is used;
> > b) how much commands are specified and how long each one executes;
> > c) where the output is sent to.
> >
> > I prepared a test suite. The single case Hans originally pointed out can be
> > reproduced here: it is case "aca" in the demonstration project. It gives
> > only a small percentage of the total output of the "env" command. The
> > other ones I added are reliably reproducible on my system: Gambas rev#5492.
> > Though, the numbers of lines vary from time to time where not the full
> > output is shown.
> >
> > There is one control window and the big text window on its right is one of
> > the two "output targets". The smaller text window below the main one is to
> > display descriptions of the test case and the symptoms observed over here.
> >
> > I hope it is reproducible on other machines and that the project is readable
> > enough for you. Sorry if these errors are due to wrong assumptions I made
> > concerning the Shell instruction.
> >
> > Regards,
> > Tobi
> >
> 
> Apparently this is a bug introduced in Line Input since it has been 
> optimized, that prevents the process output to be flushed when the 
> process has been killed
> 
> Replace 'Line Input' by 'Read', and Shell should work as expected in all 
> cases.
> 
> By the way, you should never use Line Input to read a process stream, as 
> Line Input blocks if it does not receive the end-of-line character.
> 

Oh, yes. Works perfectly now.

I supposedly never did something more overkill than this project :-)

Thanks,
Tobi