Hello. I came across the following: The manpage reboot(2) says, that inside of a pid namespace, a reboot call that normally would trigger restart actually triggers sending sighup to the init of a namespace, and sigint is sent in case of halt/poweroff. I have verified that reboot actually triggers sighup. does it mean you cannot "reboot -f" in a pid namespace, because it will actually trigger something like "systemctl daemon-reload"? (confusing behavior)... About poweroff, I used unshare -Upfr and then typed poweroff -f, and the bash started by unshare exited. Bash does not exit on sigint, so not sure what was sent? sigkill? Also, how does systemd handle this case when you tell systemd to power off/reboot? it probably exits instead of calling reboot(2), but does it make it possible to distinguish reboot from power off? Sorry for such an partially offtopic question.
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