Show hostname, MAC, and IPs on the OLED from boot - #15
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New
little-internet-oled.servicepaints the node's identity on the panel from boot: hostname in the yellow strip, eth0's MAC and each interface's IPv4 in the blue body (live:(down)/(no IPv4)states). Script lives intools/status-oled, installed to/opt/little-internetby a new07-run.shstage.The on-demand scripts (
arp_oled.py, oled tests) share the panel via a claim file in/run/little-internet(root:i2c 0775, so no sudo): they create it to pause the status display and remove it on exit to resume. The service wakes the panel on resume (luma's atexit powers the display off) and removes stale claims whose writer PID is dead. On-demand scripts trap SIGTERM sofinallycleanup runs.Tested on pi-foo-01/02: manual service install, claim handoff, SIGTERM kill, stale-claim recovery, and boot via reboot. The pi-gen stage itself is validated by the next image build.