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

From: Andreas Schwab <[email-masked]>
Date: Mon, 06 Jun 2022 18:25:00 +0200

On Jun 06 2022, Lars Ingebrigtsen wrote:

> open(STDIN, "</dev/tty") || die "reopen stdin: $!";
> open(OUT, ">&STDOUT") || die "save stdout: $!";
> close STDOUT;
> open(STDOUT, ">/dev/tty") || die "reopen stdout: $!";

That associates the process with /dev/tty, not the real terminal.  But
the running Emacs process usually does not have a controlling terminal,
thus it cannot open /dev/tty.  It needs to know the real terminal to be
able to open a tty frame on it.

-- 
Andreas Schwab, [email-masked]
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