From: Bruce Dubbs <bruce.dubbs@gmail.com>
To: Jan Schaumann <jschauma@netmeister.org>, util-linux-ng@vger.kernel.org
Subject: Re: more(1) may attempt to tcsetattr(3) despite lacking controlling terminal
Date: Thu, 13 Oct 2016 14:14:02 -0500 [thread overview]
Message-ID: <57FFDCFA.4070407@gmail.com> (raw)
In-Reply-To: <20161013143932.GA29451@netmeister.org>
Jan Schaumann wrote:
> Hello,
>
> Yesterday I reported the following bug to the Debian maintainers of the
> 'util-linux' package. They suggested I should bring it up here:
>
>
> more(1) may attempt to call tsetattr(3) on stderr even if its process is
> not in a process group with a controlling terminal. As a result,
> SIGTTOU will be generated, suspending the process.
>
> The following example illustrates the issue:
>
> $ /bin/sh -c "timeout 60 /bin/sh -c \"ls | more\""
>
> This command will now hang until the timeout, since the shell, ls(1) and
> more(1) commands invoked by timeout(1) will be suspended.
It does not hang for me, but then I don't use systemd. Perhaps systemd
should be fixed.
-- Bruce
next prev parent reply other threads:[~2016-10-13 19:14 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-10-13 14:39 more(1) may attempt to tcsetattr(3) despite lacking controlling terminal Jan Schaumann
2016-10-13 19:14 ` Bruce Dubbs [this message]
2016-10-13 20:18 ` Jakob Unterwurzacher
2016-10-13 20:52 ` Bruce Dubbs
2016-10-19 9:53 ` Karel Zak
2016-10-19 10:09 ` Karel Zak
2016-10-20 14:56 ` Sami Kerola
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