mdev and usb device node creation
Greetings: I am using an older version of busybox (1.7.0) with a newer linux kernel (3.10) and trying to get it to discover and dynamically create usb device nodes underneath /dev/bus/usb. This doesn't seem to work when I execute mdev with the -s option. Can someone please tell me if this capability is supported in newer versions of busybox? Thanks, Dallas ___ busybox mailing list busybox@busybox.net http://lists.busybox.net/mailman/listinfo/busybox
Re: mdev and usb device node creation
On Tue, Mar 10, 2015 at 4:48 PM, Harald Becker ra...@gmx.de wrote: Hi Dallas ! I am using an older version of busybox (1.7.0) with a newer linux kernel (3.10) and trying to get it to discover and dynamically create usb device nodes underneath /dev/bus/usb. This doesn't seem to work when I execute mdev with the -s option. And were is the rest of your setup? What matching entries in /etc/mdev.conf belong to your concern? Can someone please tell me if this capability is supported in newer versions of busybox? mdev -s scans the sys file system for devices and setup the /dev entries. If you want dynamic setup you should use the hotplug feature, but the device node handling of both depend on the entries in /etc/mdev.conf. So what happens and when, what is wrong in your eyes? May be you just need to enter your correct device setup. -- Harald ___ busybox mailing list busybox@busybox.net http://lists.busybox.net/mailman/listinfo/busybox Hi Harald, I was sort of expecting a mdev scan to discover and create device nodes for usb. Sounds like I need some rules defined in /etc/mdev.conf. I just have a default one. In the meantime, I have been dynamically adding / removing the usb device nodes triggered off of hotplug events. Seems to be working fine so far. ___ busybox mailing list busybox@busybox.net http://lists.busybox.net/mailman/listinfo/busybox
Re: mdev and usb device node creation
Hi Dallas ! Hi Harald, I was sort of expecting a mdev scan to discover and create device nodes for usb. Sounds like I need some rules defined in /etc/mdev.conf. I just have a default one. What consider you a default one? There are so many distros and systems out in the wild, even the Busybox snapshot archives contain two or three different mdev configurations (as examples). SO I can't tell you anything specific, without seeing what your configuration describes. mdev either scans /sys/class/... for devices entries or picks up hotplug event messages, then search the /etc/mdev.conf for a matching device entry. Then it does create/remove device nodes according to the given information. This includes moving location (e.g. into a subdirectory), creating symlinks, setting owner, group and permissions. Everything mdev does is controlled by the rules in mdev.conf, but it may contain catch all rules to do some default action. A short search on the net gave me the following line: $DEVNAME=bus/usb/([0-9]+)/([0-9]+) root:plugdev 0660 =bus/usb/%1/%2 Put this in your mdev.conf, may be it catches the names of your kernel. .. Harald ___ busybox mailing list busybox@busybox.net http://lists.busybox.net/mailman/listinfo/busybox
