Lennart Poettering
8d6e80343a
Previously, systemd-detect-virt was unable to detect "systemd-nspawn -a" container environments, i.e. where PID 1 is a stub process running in host context, as in that case /proc/1/environ was inherited from the host. Let's improve that, and add an additional check for container environments where /proc/1/environ is not cleaned up and does not contain the $container environment variable: The /proc/1/sched file shows the host PID in the first line. if this is not 1, we know we are running in a PID namespace (but not which implementation). With these changes we should be able to detect container environments that don't set $container at all.
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