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Re: [Qemu-discuss] How to run qemu with -nographic and -monitor but stil

From: Thomas Huth
Subject: Re: [Qemu-discuss] How to run qemu with -nographic and -monitor but still be able to send Ctrl+C to the guest?
Date: Tue, 10 Apr 2018 07:27:29 +0200
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.6.0

On 10.04.2018 02:10, Ciro Santilli wrote:
> On Mon, Apr 9, 2018 at 1:33 PM, Thomas Huth <address@hidden> wrote:
>> On 08.04.2018 12:39, Ciro Santilli wrote:
>>> Is there a way to both keep my `Ctrl-C` and `-monitor` working with
>>> `-nographic`?
>>> Full QEMU command:
>>>     qemu-system-x86_64 -append 'root=/dev/vda console=ttyS0' -kernel
>>> 'bzImage' -drive file='rootfs.ext2.qcow2,if=virtio,format=qcow2'
>>> -nographic -monitor telnet::45454,server,nowait
>> I think you need a chardev with signal=off for that. Try something like:
>> qemu-system-x86_64  -nographic -monitor telnet::45454,server,nowait \
>>   -chardev stdio,id=s1,signal=off \
>>   -serial none -device isa-serial,chardev=s1
> I tried that and Ctrl+C does get passed to the guest as I wanted.
> However, when I do this, I noticed that I can't pass Ctrl+A X to
> easily quit QEMU (I know I can do quit on the monitor).
> Is there a way to also keep Ctrl+A X working, in addition to having
> Ctrl+C passed to the guest?

Yes, you need to multiplex the stdio output with a HMP monitor:

qemu-system-x86_64  -nographic -monitor telnet::45454,server,nowait \
     -chardev stdio,id=s1,signal=off,mux=on -serial none \
     -device isa-serial,chardev=s1 -mon chardev=s1,mode=readline


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