From: Jeremy Jackson <jerj@coplanar.net>
To: linux-kernel@vger.kernel.org
Subject: signal to PID 1 from serial console like KeyboardRequest or CAD
Date: Fri, 25 Mar 2011 13:41:40 -0400 [thread overview]
Message-ID: <4D8CD3D4.90900@coplanar.net> (raw)
Hi,
Sent to linux-console with no reply for over a week...
I ran into a problem recently on a Linux server with a remote serial
console. /sbin/init (actually Upstart) was in a state where nothing
(useful) was running. I had to power cycle the machine to get back to
the boot prompt. This has the side-effect of triggering raid rebuilds.
It would be nice to have what Ctrl-Alt-Del does at the VGA console with
PS/2 or USB keyboard. This sends a SIGINT to PID 1, and most distros
have this set to do "shutdown -r now" which attempts a clean reboot.
Once upon a time there was KeyboardRequest, which would send a SIGWINCH
to PID 1 (when pressing Alt-UP_arrow?). I don't see any sign of this
feature in Linux 2.6.32 though.
Looking at the Sysrq handlers in the kernel I don't see any keystrokes
that send SIGINT to PID 1 either.
So, I'm wondering if it makes sense to add a Sysrq key to send a signal
to PID1 ?
--
Coplanar Networks
http://www.coplanar.net
(519)489-4903
next reply other threads:[~2011-03-25 18:18 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-03-25 17:41 Jeremy Jackson [this message]
2011-03-31 19:57 ` signal to PID 1 from serial console like KeyboardRequest or CAD Randy Dunlap
2011-04-01 5:37 ` Dmitry Torokhov
2011-04-01 15:39 ` Jeremy Jackson
2011-04-01 15:42 ` Randy Dunlap
2011-04-01 15:47 ` Jeremy Jackson
2011-04-01 15:59 ` Dmitry Torokhov
-- strict thread matches above, loose matches on Subject: below --
2011-03-11 13:43 Jeremy Jackson
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=4D8CD3D4.90900@coplanar.net \
--to=jerj@coplanar.net \
--cc=linux-kernel@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.