linux-kernel - Re: [RFC PATCH 0/8] signals: Support more than 64 signals

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Message-ID: <YdiUiHAhLyfgpvVY@cello>
Date:   Fri, 7 Jan 2022 22:29:12 +0300
From:   Arseny Maslennikov <ar@...msu.ru>
To:     Walt Drummond <walt@...mmond.us>
Cc:     Theodore Ts'o <tytso@....edu>,
        "Eric W. Biederman" <ebiederm@...ssion.com>, aacraid@...rosemi.com,
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Subject: Re: [RFC PATCH 0/8] signals: Support more than 64 signals

On Tue, Jan 04, 2022 at 02:31:44PM -0800, Walt Drummond wrote:
> The only standard tools that support SIGINFO are sleep, dd and ping,
> (and kill, for obvious reasons) so it's not like there's a vast hole
> in the tooling or something, nor is there a large legacy software base
> just waiting for SIGINFO to appear.   So while I very much enjoyed
> figuring out how to make SIGINFO work ...

As far as I recall, GNU make on *BSD does support SIGINFO (Not a
standard tool, but obviously an established one).

The developers of strace have expressed interest in SIGINFO support
to print tracer status messages (unfortunately, not on a public list).
Computational software can use this instead of stderr progress spam, if
run in an interactive fashion on a terminal, as it frequently is. There
is a user base, it's just not very vocal on kernel lists. :)

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