[RFC][PATCH 7/8]: Auto-create ptmx node when mounting devpts

H. Peter Anvin hpa at zytor.com
Thu Aug 21 11:36:47 PDT 2008

Eric W. Biederman wrote:
> The point of making it a bind is to address the concerns about
> backwards compatibility in user space.  In particular security
> conscious applications and applications that perform sanity checks
> are known to ignore things if they are the wrong type in the filesystem.

A.k.a. broken applications...

>> This is *only* required to support back-and-forth, and can be introduced at any
>> time after this patch is in the kernel -- or even before.
> You can use a file bind mount just as easily as a symlink.
> As for udev I haven't seen a version that is accessible to mere mortals yet
> and it doesn't seem like they plan on it being so.  Eventually I will get
> around to making sense of it as we need to make it work in a container
> but so far it seems to be much more complex then it should be.

I have not had that experience... I find it relatively simple to deal 
with.  The biggest problem is the fact that the rules aren't bundled 
with the kernel, which causes nasty chicken and egg problems.


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