[Mageia-dev] dropping /proc/bus/sub (Re: [changelog] [RPM] cauldron core/release systemd-189-2.mga3)

Thu Aug 30 11:39:16 CEST 2012

On 29 August 2012 16:16, Thierry Vignaud <thierry.vignaud at gmail.com> wrote:
+>>>>> Yeah because we're now on kernel 3.5 we can no longer do certain things
+>>>>> relating to this mount point.
+>>>>>
+>>>>> IIRC some ldetect stuff used it and some of the 3G and/or
+>>>>> printer/scanner stuff might also depend on it and need to be migrated
+>>>>> too. I don't know that code very well, but I know some folks complained
+>>>>> when we stopped mounting it by default, so I've no doubt that it's use
+>>>>> is lurking somewhere!
+>>>>>
+>>>>> I would guess that in some cases /dev/bus/usb/ might be sufficient for
+>>>>> what is needed.
+>>>>
+>>>> Humm...
+>>>> I've still around a patch making ldetect using libusb.
+>>>> Sadly, we're missing some data...
+>>>> Basically we would miss the kernel driver name binded with each usb device.
+>>>>
+>>>> We cannot workaround it since libusb misses with the ability to either
+>>>> query the sysfs device path or to got the Port number
+>>>> ("Port" in /proc/bus/usb/devices).
+>>>> (I miss the Port number in order to compute the
+>>>> /sys/bus/devices/usb/foobar path)
+>>>>
+>>>> W/o that I cannot retrieve the modalias which would help me to get the kernel
+>>>> driver name.
+>>>>
+>>>> I guess I'll have to resurect that work and try harder to find some
+>>>> workaround...
+>>>
+>>> Why not using sysfs for everything directly?
+
+(...)
+
+> See also http://sourceforge.net/apps/trac/libusbx/ticket/24
+
+I've put a simple fix at https://bugs.mageia.org/show_bug.cgi?id=7248
+