From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from [140.186.70.92] (port=60833 helo=eggs.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1PGf9O-0002Vn-LR for qemu-devel@nongnu.org; Thu, 11 Nov 2010 16:57:47 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1PGf9M-0006sF-PJ for qemu-devel@nongnu.org; Thu, 11 Nov 2010 16:57:46 -0500 Received: from sj-iport-5.cisco.com ([171.68.10.87]:44835) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1PGf9M-0006rq-Il for qemu-devel@nongnu.org; Thu, 11 Nov 2010 16:57:44 -0500 Message-ID: <4CDC66D5.6000003@cisco.com> Date: Thu, 11 Nov 2010 14:57:41 -0700 From: "David S. Ahern" MIME-Version: 1.0 Subject: Re: [Qemu-devel] Log Console Output to File References: <1289454632425616500@rkmorris.us> <4CDC2666.5000705@cisco.com> <1289507845918233500@rkmorris.us> <4CDC5D75.2040500@mail.berlios.de> In-Reply-To: <4CDC5D75.2040500@mail.berlios.de> Content-Type: text/plain; charset=ISO-8859-15 Content-Transfer-Encoding: 7bit List-Id: qemu-devel.nongnu.org List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Stefan Weil Cc: Russell Morris , qemu-devel@nongnu.org On 11/11/10 14:17, Stefan Weil wrote: > Am 11.11.2010 21:37, schrieb Russell Morris: >> Hi, >> >> Thanks for the pointer! I tried this, but I get an error message, as >> follows ... >> *chardev: opening backent "stdio" failed* >> *qemu: could not open serial device 'stdio': Inappropriate ioctl for >> device.* >> >> Thoughts? > > Hi, > > I assume that you tried this (as it was suggested by an earlier mail): > > qemu -serial stdio -nographic ... > > This results in an error message for me, too: > > chardev: opening backend "stdio" failed > qemu: could not open serial device 'stdio': No such file or directory > > Try this variant (which works for me): > > qemu -nographic ... > > It will redirect the serial output (first serial port) of your guest os to > standard output, so you can write it to a file with the usual methods, > for example this one: > > qemu -nographic ... | tee log.txt > > Regards > > Stefan Weil > On one host I am using qemu-kvm from qemu-system-x86-0.13.0-1.fc14.x86_64, and on another /usr/local/qemu-kvm.latest/bin/qemu-kvm where latest was qemu-kvm.git on Oct 11. Both work fine. I like this route (using screen and stdio -- no piping) so that I still have a usable console. Maybe it's a difference between qemu and qemu-kvm. David