[Gambas-user] Strange problem with running Shell on Fedora (code works in IDE but not in executable!!)

[Willy Raets]

On Sat, 2013-03-30 at 15:21 +0100, Benoît Minisini wrote:
> Le 30/03/2013 15:18, Willy Raets a écrit :
> > On Sat, 2013-03-30 at 13:14 +0100, Tobias Boege wrote:
> >> On Sat, 30 Mar 2013, Beno?t Minisini wrote:
> >>> Le 30/03/2013 12:11, Tobias Boege a ?crit :
> >>>> On Sat, 30 Mar 2013, Tobias Boege wrote:
> >>>>> Hmm. I have sudo-1.8.6p7 in use (more accurately, the error comes from the
> >>>>> 'sudoers' plugin but it has the same version here) on Arch Linux and, as I
> >>>>> said, my test program works.
> >>>>>
> >>>>> Well, I had another look at the source code and it seems that there's a
> >>>>> certain variable 'def_requiretty' which is zero in my system's package and
> >>>>> prevents checking /dev/tty at all. This finally explains why all test cases
> >>>>> worked on my system even though there was no /dev/tty accessible from
> >>>>> Desktop. See sudoers(5) for a description and how to deactivate this in the
> >>>>> sudoers configuration.
> >>>>>
> >>>>> Since editing user configurations to make programs work is often not
> >>>>> desirable, I experimented with a patched sudo that requires the tty et
> >>>>> voila! Got the same error as yours when running from desktop. However, now
> >>>>> I can't solve it either :-)
> >>>>>
> >>>>> I'll start another thread to attract Benoit's attention again...
> >>>>>
> >>>>
> >>>> Hmm, nevermind. You can use the Exec instruction to get it to work:
> >>>>
> >>>> hProcess = Exec ["sudo", "-s", "id", "-u" ] For Input Output As "Process"
> >>>>
> >>>> This is how the IDE does it and as you mentioned, the IDE gets it correctly.
> >>>> Maybe someone can enlighten us why it doesn't work with Shell but it's not
> >>>> that important to me.
> >>>>
> >>>> Regards,
> >>>> Tobi
> >>>>
> >>>
> >>> SHELL "a b c" ...
> >>>
> >>> is equivalent to:
> >>>
> >>> EXEC [ System.Shell, "-c", "a b c" ]
> >>>
> >>> with a call to setpgid(0,0) to create its own session like an
> >>> independant shell.
> >>>
> >>> As for virtual terminal creation, they work both the same.
> >>>
> >>> - "For Input Output" => create a virtual terminal for the i/o of the
> >>> child process, and get the i/o of the child process through it.
> >>>
> >>> - "For Read Write" => Just redirect the i/o of the child process to get
> >>> them in the parent process.
> >>>
> >>> Can you try to replace "SHELL ..." by "EXEC [ System.Shell, "-c", ... ]"
> >>> and tell me if it works better?
> >>>
> >>
> >> Exec [System.Shell, "-c", "sudo -s id -u"] For Input Output
> >>
> >> It works!
> >
> > NOT on the Fedora 17 - LXDE 0.5.12 - Gambas 3.4.0 when run from
> > executable. Same error again
> >
> > Screen01.png -> Running executable with error message
> > Screen02.png -> changed code using Exec [System.Shell .....]
> >
> > Somehow it is impossible to use sudo on the Fedora box from Gambas
> > executable.
> > Although all works when done directly in terminal by hand or when done
> > from Gambas 3 app run in IDE. The Gambas 3 executables just refuse to
> > work...
> >
> > On my Linux Mint 13 all works just fine.
> >
> 
> Sorry, but you must use "For Input Output", not "For Read Write".

Well I used Read Write because when replacing Read Write with Input
Output the application does nothing but keep the system busy!!

Source Archive attached (made by Tobias, adapted by me)


-- 
Kind regards,

Willy (aka gbWilly)

http://gambasshowcase.org/
http://howtogambas.org
http://gambos.org



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