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bug#33154: 27.0.50; create_process on Darwin should not invoke setsid()


From: Filipp Gunbin
Subject: bug#33154: 27.0.50; create_process on Darwin should not invoke setsid() after vfork() [PATCH]
Date: Sun, 11 Nov 2018 20:14:33 +0300
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/27.0.50 (darwin)

On 10/11/2018 09:09 -0800, Paul Eggert wrote:

> Filipp Gunbin wrote:
>> On 09/11/2018 12:16 +0100, Andreas Schwab wrote:
>>
>>> On Nov 09 2018, Filipp Gunbin <address@hidden> wrote:
>>>
>>>> I have one failing case: "M-x shell-command sudo ls -la" reports "sudo:
>>>> no tty present and no askpass program specified".
>>>
>>> That's not a bug.  If shell-command runs the command synchronously it
>>> doesn't allocate a tty.
>>
>> Are there any reasons for not allocating a pty in this case?  A
>> synchronous program may be interactive.
>
> How would the interaction work, though? I can see potential problems with
> existing Lisp code that runs synchronous commands if we allocate ptys
> for them.

Yes, I see, there's no way to interact.  Without interaction, there's no
sense in allocating pty.

> At any rate, that case has always failed the same way on Ubuntu 18.04 etc., so
> if this is a problem it's not limited to macOS and someone should file a new 
> bug
> report for it.

No need for that.

Thanks.





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