Messages in this thread | | | From | Kay Sievers <> | Date | Sat, 28 Jan 2012 22:32:06 +0100 | Subject | Re: [RFC] fix devpts mount behavior |
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On Sat, Jan 28, 2012 at 21:52, Eric W. Biederman <ebiederm@xmission.com> wrote: > Serge Hallyn <serge.hallyn@canonical.com> writes: > >> Quoting Kay Sievers (kay.sievers@vrfy.org): >>> We might also thing about changing /sys/class/tty/ptmx/, and have the >>> kernel create the symlink? The loops through userspace to setup >>> default kernel stuff are kind of crazy ...
>> sorry, there is something I'm missing here. Without a target kobj >> to link to, how would we go about telling the kernel that /dev/ptmx >> should be a symlink to /dev/pts/ptmx? Is there a way to do that?
There is no support for symlinks in the core at the moment. But I guess we could just add support for it to the driver core and devtmpfs to create a symlink in /dev instead of a device node.
The ptmx device would need to pass that information along to the driver core call when creating the ptmx device.
> There is precedent in the /dev/fd symlinks, so I expect you want > to look and see where the configuration for that comes from.
That's a static list of stuff created at startup. But it's easier to do in usersace, because /proc is not configurable or optional for usual use cases, so we can just do it unconditionally in userspace. They also can not conflict with device nodes.
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