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From: Sam <batmanustc@gmail.com>
Date: Fri, 25 Aug 2017 10:11:59 +0800
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Subject: [Qemu-devel] [QGA] Bug of qga?
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To: qemu-devel@nongnu.org

Hi all,

I'm using qga to send `route -n` and `ping` command to guest. But I found
SOMETIMES, the second `ping` command's result is the same as `route -n`
command.

So I guess is there some cache mechanism of qga command result? So when I
send the second command, and receive from qga socket, I receive the result
of first command.

Or is this bug happened because of I use async mechanism of python code to
operate qga socket?

This is the python code I use to operate on this qga socket:

try:
>         sock=socket(AF_UNIX, SOCK_STREAM)
>         sock.settimeout(20)
>         sock.connect(vm_qga_sockpath)
>         sock.send(cmd)
>         while True:
>             res = sock.recv(1024)
>             if len(res):
>                 break
>     except Exception as e:
>         res = -1
>     finally:
>         sock.settimeout(None)
>         sock.close()