[SOLVED] Where to obtain info if /proc/bus/usb is deprecated !

intmail01 · 09-29-2014, 02:28 PM

Hello,

I have got he last kernel 3.16.3 and it seems that the usbfs disapear then the files /proc/bus/usb/devices is no longer maintained. Could sone can tell me where to get now info about usb devices ?

Thank you

Didier Spaier · 09-29-2014, 05:44 PM

Hello,

See /sys/bus/usb/devices instead.

intmail01 · 09-30-2014, 05:34 AM

Quote:

Originally Posted by Didier Spaier

Hello,

See /sys/bus/usb/devices instead.

Hi Didier Spaier

Thanks for you post but the link is a directory not a file.
I did cat /sys/bus/usb/devices but nothing. I tried to mount it as usbfs but error occurs.

Didier Spaier · 09-30-2014, 05:41 AM

Quote:

Originally Posted by intmail01

Hi Didier Spaier

Thanks for you post but the link is a directory not a file.
I did cat /sys/bus/usb/devices but nothing. I tried to mount it as usbfs but error occurs.

This is because this directory only contains symlinks to /sys/devices/<files>.
To check try:

Code:

ls -l /sys/bus/usb/devices

intmail01 · 11-11-2014, 05:33 AM

nothing to do with /proc/bus/usb. udev is the new functionality.

Didier Spaier · 11-11-2014, 06:56 AM

Quote:

Originally Posted by intmail01

nothing to do with /proc/bus/usb. udev is the new functionality.

What do you mean?

udev has mostly replaced devfs for managing devices nodes found in /dev (hot-plugging), and is intended to replace neither /proc nor /sys.

Also udev is not new at all: the udev-0.1 source tarball still available here is dated 11-Apr-2003.

/sys is supposed to eventually completely supersede /proc, but that will need a lot of time as so many programs still rely on /proc