Re: Why no XML in the Kernel?

[Bas Westerbaan]

Hello Nick,

 In case /proc or /sys wouldn't be preffered, a simple key value
binary format would do.

 First a key/value pair count. Followed by the key/value pairs, which
consist out of the value and key prefixed by their size.

 Your user and kernel code could ignore keys they don't regognize.

 A better way though, is negotiate what types of structures to pass.

 The user space program would support all previous version of the kernel module.

  Bas

On 10/2/05, Nick Piggin <nickpiggin@xxxxxxxxxxxx> wrote:
> James Courtier-Dutton wrote:
>
> > I have a requirement to pass information from the kernel to user space.
> > The information is passed fairly rarely, but over time extra parameters
> > are added. At the moment we just use a struct, but that means that the
> > kernel and the userspace app have to both keep in step. If something
> > like XML was used, we could implement new parameters in the kernel, and
> > the user space could just ignore them, until the user space is upgraded.
> > XML would initially seem a good idea for this, but are there any methods
> > currently used in the kernel that could handle these parameter changes
> > over time.
> >
> > For example, should the sysfs be used for this?
> >
> > Any comments?
> >
>
> Yes use sysfs (or procfs if the information is related to a process).
> Using ASCII text representation, and a single value per file is
> noramlly the preferred method to do this I think.
>
> Nick
>
> --
> SUSE Labs, Novell Inc.
>
>
> Send instant messages to your online friends http://au.messenger.yahoo.com
>
> -
> To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
> the body of a message to majordomo@xxxxxxxxxxxxxxx
> More majordomo info at  http://vger.kernel.org/majordomo-info.html
> Please read the FAQ at  http://www.tux.org/lkml/
>



--
Bas Westerbaan
http://blog.w-nz.com/
GPG Public Keys: http://w-nz.com/keys/bas.westerbaan.asc
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/