Re: [PATCH 2/5] VT binding: Add sysfs support

On Fri, Jun 09, 2006 at 04:39:51PM +0800, Antonino A. Daplas wrote:

Add sysfs attributes for binding and unbinding VT console drivers. The
attributes are located in /sys/class/tty/console and are namely:

    A. backend - list registered drivers in the following format:

    "I C: Description"

No, this violates the "one value per file" issue with sysfs.  How do you
know you will not overflow the buffer passed to you?

    Where: I  = ID number of the driver
           C  = status of the driver which can be:

		S = system driver
		B = bound modular driver
		U = unbound modular driver

	   Description - text description of the driver

    B. bind - binds a driver to the console layer

       echo <ID> > /sys/class/tty/console/bind

    C. unbind - unbinds a driver from the console layer

       echo <ID> > /sys/class/tty/console/unbind

The tty layer does nothing to these attributes except create them and punt all
requests to the VT layer.

Why is this needed?  What is wrong with the current scheme of binding
ttys to the console?

thanks,

greg k-h