Lennart Poettering
f2c1d491a5
So far, we invoked pivot_root() specifying /mnt/ as second argument, which then unmounted right-after. We'd create /mnt/ if needed. This sucks, because it means /mnt/ must strictly be pre-created on immutable images. Remove this limitation, by using pivot_root() with "." as source and target, which will result in two stacked mounts afterwards: the new one underneath, the old one ontop. We can then simply unmount the top one, and have what we want without needing any extra /mnt/ dir. Since we don't need /mnt/ anymore we can get rid of the extra unmount_old_root parameter and simply specify it as NULL if we don't want the old mount to stick around.
System and Service Manager
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