Is that "once per boot", "once per interface appearance", or "once per physical NIC lifetime"? Can the command check its effects directly (i.e. check whether a setting has been set, or whatever the task is)?
If it's once per boot, a flag file in /run/thing_done.$ifname would be a common solution... If it needs to be done again if the interface disappears and reappears – udev ENV{thing_done}="1".
On Sat, Jul 15, 2023, 19:20 Demi Marie Obenour <demi@xxxxxxxxxxxxxxxxxxxxxx> wrote:
What is the appropriate solution for running a non-idempotent command
from udev? One command needs to be run exactly once when a network
interface appears, and another command needs to be run exactly once when
a network interface disappears. Both commands need to run after
network-pre.target, but that can be handled in the script themselves.
--
Sincerely,
Demi Marie Obenour (she/her/hers)
Invisible Things Lab
