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: 7+ 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
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 a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox