From wpdster@gmail.com Tue Sep 13 17:04:17 2011 Received: from mail-fx0-f44.google.com ([209.85.161.44]) by stoneboat.aleph1.co.uk with esmtps (TLS1.0:RSA_ARCFOUR_SHA1:16) (Exim 4.72) (envelope-from ) id 1R3VSy-00066O-UX for balloon@balloonboard.org; Tue, 13 Sep 2011 17:04:17 +0100 Received: by fxd18 with SMTP id 18so785512fxd.31 for ; Tue, 13 Sep 2011 09:04:03 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:from:date:message-id:subject:to :cc:content-type:content-transfer-encoding; bh=jmB7I+i0/jW8Gcs9tHEuOWKhGq6VooLg22nFJfiPEBw=; b=U2PycE6d9xN2S+Ly3zvWJy79IHBJgF7Ekci3oQAH1y2xmd4+6EQeMy8Rdyi0yfkyNJ X60yNZpQ0GapulDYA1fr0N7EQHgOv20KmuJGmci6c5tl66MfgXo76fIUuIszXji6naKT 7mpYKv108WKJtv+qKO2rNB9srYPutYVLvAYG4= Received: by 10.223.49.213 with SMTP id w21mr1896779faf.44.1315929843187; Tue, 13 Sep 2011 09:04:03 -0700 (PDT) MIME-Version: 1.0 Received: by 10.223.108.199 with HTTP; Tue, 13 Sep 2011 09:03:43 -0700 (PDT) In-Reply-To: <20110913155324.GA11212@earth.li> References: <20110913155324.GA11212@earth.li> From: Patrick Doyle Date: Tue, 13 Sep 2011 12:03:43 -0400 Message-ID: To: Jonathan McDowell Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable X-SA-Exim-Connect-IP: 209.85.161.44 X-SA-Exim-Mail-From: wpdster@gmail.com X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on stoneboat.aleph1.co.uk X-Spam-Level: X-Spam-Status: No, score=-3.1 required=4.5 tests=AWL,BAYES_00,FREEMAIL_FROM, RCVD_IN_DNSWL_LOW,SPF_PASS autolearn=ham version=3.3.1 X-SA-Exim-Version: 4.2.1 (built Mon, 22 Mar 2010 06:51:10 +0000) X-SA-Exim-Scanned: Yes (on stoneboat.aleph1.co.uk) Cc: balloon@balloonboard.org Subject: Re: [Balloon] Redirect console to ssh pty X-BeenThere: balloon@balloonboard.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Balloon List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 13 Sep 2011 16:04:17 -0000 On Tue, Sep 13, 2011 at 11:53 AM, Jonathan McDowell wrot= e: > On Tue, Sep 13, 2011 at 10:37:04AM -0400, Patrick Doyle wrote: >> OK, I'm stumped... >> >> I would like to redirect the console output (specifically printk >> messages) away from ttyS2 (over which I'm running ppp) and onto the >> pty associated with my ssh login. >> >> Is this possible? =A0If so, how would I do it? =A0Everything I've seen i= n >> the kernel documentation is related to switching consoles between VTs >> on a PC and the frame buffer. =A0This is a little different. > > Not quite what you asked for, but you might want to investigate > netconsole, which will output kernel console output over the network. Hi Jonathan, Thank you for your reply.... Basically, I'm trying to spend some time now in order that I might be lazy later :-) Right now, I do: # insmod mymodule.ko; dmesg | tail; # look at printk messages # rmmod mymodule (go fix mymodule and try again) I would like to do # setconsole mypty (once, when I log in) (repeatedly, as I debug my module) # insmod mymodule.ko (see printk messages spewing back at me -- I happen to be logged in via ssh= ) # rmmod mymodule (go fix mymodule and try again) Look at all of those pesky "dmesg | tail" I don't have to type anymore. As I said, I'm just trying to be lazy here, and thought I recalled an ioctl for redirecting the console (such as is done with a Konsole window in KDE, and I've read is done with screen as well). I figured I couldn't be the first person to be that lazy, but I guess I'm asking the wrong group :-) --wpd