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    SubjectRe: CD writing in future Linux (stirring up a hornets' nest)
    On Fri, 10 Feb 2006, Greg KH wrote:

    > On Fri, Feb 10, 2006 at 04:06:39PM -0500, Bill Davidsen wrote:
    > >
    > > The kernel could provide a list of devices by category. It doesn't have
    > > to name them, run scripts, give descriptions, or paint them blue. Just a
    > > list of all block devices, tapes, by major/minor and category (ie.
    > > block, optical, floppy) would give the application layer a chance to do
    > > it's own interpretation.
    >
    > It does so today in sysfs, that is what it is there for.

    sysfs doesn't do quite that level of categorization; if it did, cdrom_id
    would be unnecessary. It would be nice if you could do
    "grep 1 /sys/block/*/burns_cds" and get a list of all the block devices in
    your system that burn cds. (You can currently get a list of all of the
    removable block devices in your system, but not much else.)

    The kernel must know a bunch of this sort of stuff, and it would be nice
    if the information available. (In fact, there's a lot that's in /proc/ide
    that isn't in /sys, which is a bit annoying, since it would be useful in
    /sys, especially if it would mean that you could ignore details of what
    kind of bus things were on.)

    -Daniel
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