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

[Benoît Minisini]

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".

-- 
Benoît Minisini