bug#41788: 28.0.50; emacsclient -t doesn't work with vipe from moreutils

[Andreas Schwab <schwab@linux-m68k.org>]

On Jun 06 2022, Lars Ingebrigtsen wrote:

> Platon Pronko <platon7pronko@gmail.com> writes:
>
>> $ echo a | EDITOR='emacsclient -t' vipe
>> *ERROR*: Could not open file: /dev/tty
>> emacsclient -t exited nonzero, aborting
>>
>> (vipe is a tool from moreutils, used to insert an editor in the middle of
>> the pipeline)
>>
>> Looking inside vipe source I see that it reopens stdin before calling
>> the EDITOR:
>>
>> close STDIN;
>> open(STDIN, "</dev/tty") || die "reopen stdin: $!";
>>
>> If I use for example nano instead of emacsclient -t then everything works correctly.
>
> (I'm going through old bug reports that unfortunately weren't resolved
> at the time.)
>
> This problem is still present in Emacs 29.  Does anybody understand
> where the misbehaviour between this STDIN redirect and what emacsclient
> is complaining about can be fixed?

It's not emacsclient that is complaining, it just displays the error
raised by emacs.  But it is hard to guess what's going on without
knowing the exact command line.

-- 
Andreas Schwab, schwab@linux-m68k.org
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