clean up after failed unpack

[hallyn]

If you 'umoci unpack --image x:y dest', and there is an error in the x:y config, then dest will remain on disk, partially unpacked. There may be reasons not to, but offhand it seems most intuitive to clean up.

[cyphar]

Yes, that makes sense. Especially since if you're an unprivileged user then rm -rf might not actually work, and you need umoci to be clever about emulating CAP_DAC_OVERRIDE.

[hallyn]

Right. Well you can "just" do the equivalent of bottom=$(awk -F: '/serge/ { print $2 }' /etc/subuid) range=$(awk -F: '/serge/ { print $3 }' /etc/subuid) lxc-userns-exec -m b:0:$(id-u):1 -m b:1:${bottom}:${range} rm -rf rootfs but not having to do that is so much nicer :)