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    SubjectRe: CD writing in future Linux (stirring up a hornets' nest)
    Date
    On Tuesday 14 February 2006 13:59, Joerg Schilling wrote:
    > Greg KH <greg@kroah.com> wrote:
    > > On Mon, Feb 13, 2006 at 02:26:54PM +0100, Joerg Schilling wrote:
    > > > Greg KH <greg@kroah.com> 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.
    > > >
    > > > Do you really whant libscg to open _every_ non-directory file under
    > > > /sys?
    > >
    > > Of course not. Here's one line of bash that gets you the major:minor
    > > file of every block device in the system:
    > > block_devices="$(echo /sys/block/*/dev /sys/block/*/*/dev)"
    > >
    > > The block devices are all in a specific location.
    >
    > Are you sure you understand the problem?
    >
    > It isd most unlikely that all SCSI devices are there.
    >
    > Jörg

    Which is why there is also /sys/class/scsi_host and /sys/class/scsi_device
    those two, together with the block device data available via /sys/block should
    be enough to enumerate every ATAPI and SCSI device on the system.

    DRH
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