In several Ubuntu CI jobs I noticed timeouts in TEST-69, which are
apparently caused by a very stubborn bash/login process:
$ journalctl -o short-monotonic --no-hostname --file artifacts/TEST-69-SHUTDOWN.journal
[ 2011.698430] systemd[1]: shutdown.target: starting held back, waiting for: veritysetup.target
[ 2011.698473] systemd[1]: sysinit.target: stopping held back, waiting for: user@0.service
[ 2045.884982] systemd[1]: systemd-oomd.service: Got notification message from PID 54 (WATCHDOG=1)
[ 2071.576424] systemd[1]: Received SIGCHLD from PID 65 (bash).
[ 2071.576941] systemd[1]: Child 65 (bash) died (code=killed, status=1/HUP)
[ 2071.577026] systemd[1]: session-13.scope: Child 65 belongs to session-13.scope.
[ 2071.577100] systemd[1]: session-13.scope: cgroup is empty
[ 2071.577249] systemd[1]: session-13.scope: Deactivated successfully.
$ journalctl -o short-monotonic --no-hostname --file artifacts/TEST-69-SHUTDOWN.journal _PID=65
[ 3038.661488] login[65]: ROOT LOGIN on '/dev/pts/0'
Since, in this case, we really care only about the actual shutdown,
let's shorten the service stop/abort timeouts to let systemd SIGKILL all
remaining processes in the 60s `expect` window.
/etc/bash.bashrc appears to be Debian-specific[0] (or specific to bash
versions compiled with -DSYS_BASHRC), which doesn't seem to be the case
for C8S. Let's use ~/.bashrc instead to make the CIs happy again.
[0] https://sources.debian.org/src/bash/5.1-6/debian/README/#L50-L56
Wraps nspawn to be able to use pexpect. The test logs in on the console
and runs screen. In one screen window it types in shutdown commands and
checks whether a wall message was sent to the other.
