GNU bug report logs - #26371
[PATCH 0/1] tty: do not provide conflicting information

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Message #13 received at 26371-done <at> debbugs.gnu.org (full text, mbox):

From: Paul Eggert <eggert <at> cs.ucla.edu>
To: Christian Brauner <christian.brauner <at> ubuntu.com>, coreutils <at> gnu.org,
 26371-done <at> debbugs.gnu.org, stgraber <at> ubuntu.com, serge <at> hallyn.com
Subject: Re: bug#26371: [PATCH 0/1] tty: do not provide conflicting information
Date: Wed, 5 Apr 2017 11:40:15 -0700

[Message part 1 (text/plain, inline)]

Thanks for the bug report. The situation you describe seems to be a 
platform that does not conform to POSIX, since POSIX doesn't allow for 
isatty to succeed but ttyname to fail. So I expect you'll run into 
problems other than with the tty program, as other software will make 
the same assumptions that tty is making.

That being said, tty could do a better job about the situation. I 
installed the attached somewhat-more-ambitious patch, so that tty will 
do more-extensive checking of the results of isatty and/or ttyname (and 
so that it never needs to call both functions and worry about whether 
their results are consistent :-). Please give it a try on your platform.

[0001-tty-handle-misconfigured-namespaces.patch (application/x-patch, attachment)]

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