Sorry for being a bit off topic here but I'm hoping some of the clever people on this list can help me out with a systemd-udev issue here.I'm hoping this is a solved issue in fedora that maybe hasn't made its way upstream yet.
I have a custom usb devive that I want a certain group of users to have full access to when it is plugged in . For CentOS 6 & 7 I just add a rule to /etc/udev/rules.d like
SUBSYSTEM=="usb", ATTR{idVendor}=="03eb", ATTR{idProduct}=="2017", GROUP="atmel", MODE="666"
and Bob is your uncle. The created usb device ( /dev/bus/usb/.../... gets permissions 666 as user root and group atmel .
However, I cannot get this to work the same way with CentOS 8 / Rocky Linux 8 / ( RHEL 8 ) and I cannot figure out why not. The device in /dev/bus/usb is being created but only root can access it as the ownersip is set to root:root and the mode to 664 . The logs report an : unhandled action 'bind' on /sys/devices/pci0000:00/0000:00:14.0/usb1/1-1 ( or similar depending on the port used ) and systemd-udev retuns : invalid SUBSYSTEM operation which doesn't tell me a lot.
Removing the MODE and GROUP from the rule makes the error messages go away but ownership and permissions are set to the default root and 664
Trying to replace MODE and GROUP ith a RUN=+some_script also fails ( with or without including the ACTION=="add" keyword. The script never starts as far as I can tell.
Anybody knows what is going on here ? Does systemd-udevd not have root permissions ????? I can of course set the mode as user root or use sudo but really ?
systemd is version 239 which is probably outdated by fedora standards but it is what comes with RHEL 8.5 clones.
peter
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Peter Skensved