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From: Laurent Vivier <laurent@vivier.eu>
References: <20190118213122.22865-1-richard.henderson@linaro.org>
	<20190118213122.22865-48-richard.henderson@linaro.org>
	<86bae9b3-75c8-64df-92d1-b4efc35b646c@vivier.eu>
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Date: Wed, 13 Feb 2019 14:46:59 +0100
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Subject: Re: [Qemu-devel] [PATCH v6 48/49] linux-user: Split out ioctl
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To: Richard Henderson <richard.henderson@linaro.org>, qemu-devel@nongnu.org

On 13/02/2019 14:09, Laurent Vivier wrote:
> Hi,
> 
> this one is really a cut'n'paste but it introduces a problem with 
> qemu-alpha, I don't know how/why:
> 
>   $ sudo unshare --ipc --uts --pid --fork --kill-child --mount chroot chroot/alpha/sid/
>   Unsupported ioctl: cmd=0x80047476
> 
> And then it hangs.
> 
> I'll try to debug.

In fact it happens with sid, with ppc64 too, but not with m68k and sh4.

And only with "unshare --pid --fork".

Without "unshare", the result is:

  Unsupported ioctl: cmd=0x80047476
  bash: cannot set terminal process group (11507): Function not implemented
  bash: no job control in this shell
  Unsupported ioctl: cmd=0x80087467
  Unsupported ioctl: cmd=0x80087467
  Unsupported ioctl: cmd=0x802c7415

Thanks,
Laurent