On Wed, Mar 09, 2022 at 03:04:00PM +0100, Kevin P wrote: > Good evening everyone. > I would like a nspawn container on my Raspberry Pi (Raspbian, systemd 247) > to access a RTL2838 DVB-T USB stick. > Inside the container, dump1090 will run and feed aircraft data (piaware and > adsbexchange projects). > > lsusb gives: > Bus 001 Device 005: ID 0bda:2838 Realtek Semiconductor Corp. RTL2838 DVB-T > > file /dev/bus/usb/001/005 returns: > /dev/bus/usb/001/005: character special (189/4) > > And finally grep 189 /proc/devices shows: > 189 usb_device > > I edited both the .nspawn file and the .service file, of which I'm > reporting the relevant parts below. > /etc/systemd/nspawn/ads-b.nspawn > [Files] > Bind=/dev/bus/usb/001/005 > > systemd-nspawn@ads-b.service > [Service] > DeviceAllow=/dev/bus/usb/001/005 rwm > DeviceAllow=usb_device rwm > > However I feel like I am doing something wrong, as starting dump1090 from > within the container returns permission denied. > I'll gladly take any advice :)
Odds are the program wants to access the device node for the driver, not the "raw" USB device /dev/bus/usb/*, right? What does strace show is failing exactly when you run the program? thanks, greg k-h