I have a program, init-jm, that forks and executes /usr/lib/systemd/systemd in the parent (using execl() ) while the child collects some stats in a loop.
The child sets its argv[0][0] to ‘@’. init-jm is invoked using the “init” kernel parameter on a switch-root system (it’s Fedora 41). Can someone explain why systemd (PID 1) sends SIGHUP to the child? This happens just before the statement log_execution_mode(&first_boot) is executed inside main(). Sending SIGHUP to the child seems to be particular to the re-execution of the systemd binary during switch-root because it is not sent when init-jm is invoked using “rdinit”. Thanks, -James M
