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Date: Thu, 11 Nov 2010 22:17:41 +0100
From: Stefan Weil <weil@mail.berlios.de>
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Subject: Re: [Qemu-devel] Log Console Output to File
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To: Russell Morris <rmorris@rkmorris.us>
Cc: qemu-devel@nongnu.org, "David S. Ahern" <daahern@cisco.com>

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