From mboxrd@z Thu Jan  1 00:00:00 1970
From: ebiederm-aS9lmoZGLiVWk0Htik3J/w@public.gmane.org (Eric W. Biederman)
Subject: Re: [PATCH 0/4] devpts: fix devpts mount behavior
Date: Sun, 23 Sep 2012 10:42:32 -0700
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To: "H. Peter Anvin" <hpa-YMNOUZJC4hwAvxtiuMwx3w@public.gmane.org>
Cc: Greg Kroah-Hartman <gregkh-hQyY1W1yCW8ekmWlsbkhG0B+6BGkLq7r@public.gmane.org>, containers-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org, Kay Sievers <kay.sievers-tD+1rO4QERM@public.gmane.org>, Dave Hansen <haveblue-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org>, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, Al Viro <viro-RmSDqhL/yNMiFSDQTTA3OLVCufUGDwFn@public.gmane.org>, Andy Whitcroft <apw-Z7WLFzj8eWMS+FvcfC7Uqw@public.gmane.org>, sukadev-23VcF4HTsmIX0ybBhKVfKdBPR1lH4CV8@public.gmane.org, Linus Torvalds <torvalds-de/tnXTf+JLsfHDXvbKv3WD2FQJk+8+b@public.gmane.org>, Alan Cox <alan-qBU/x9rampVanCEyBjwyrvXRex20P6io@public.gmane.org>
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"H. Peter Anvin" <hpa-YMNOUZJC4hwAvxtiuMwx3w@public.gmane.org> writes:

> On 09/22/2012 08:47 PM, Eric W. Biederman wrote:
>> Making /dev/ptmx a symlink sounds simple, but in practice no one could
>> actually figure out how to make it happen.
>
> This feels particularly ridiculous since udev now requires devtmpfs
> (as in it will no longer work without it), which means this is all
> done in the kernel, so we should just be able to fix this in the
> kernel.

Some versions of udev require devtmpfs.  At best we could have something
conditional in the kernel that does this.

> Greg, Kay, any idea how to make ptmx show up in devtmpfs as a symlink
> to pts/pmtx instead of as a device node?

The conversation stalled in January with that very question.

What I am proposing doesn't conflict with any effort like that.

Eric