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

[Tobias Boege]

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!

Regards,
Tobi