Messages in this thread | | | Date | Sun, 2 Oct 2005 15:47:02 +0200 | From | Willy Tarreau <> | Subject | Re: Why no XML in the Kernel? |
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On Sun, Oct 02, 2005 at 12:02:49PM +0100, James Courtier-Dutton wrote: > Nick Piggin wrote: > > >Ahmad Reza Cheraghi wrote: > > > >>Can somebody tell me why the Kernel-Development dont > >>wanne have XML is being used in the Kernel?? > >> > > > >Because nobody has come up with a good reason why it > >should be. Same as anything that isn't in the kernel. > > > >Nick > > > 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.
Yes, look at /proc/meminfo for instance. Everytime you need to return multiple values from a single file, you can easily do it with one key per line using the following syntax :
key: value [value ...]
It's also how SMTP and HTTP works and servers often send data that most clients simply ignore.
Regards, Willy
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