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2024-01-25linuxnamespaces.run_in_fork: use os._exit instead of sys.exitHelmut Grohne
When using sys.exit, we actually raise a SystemExit exception and as a consequence exit all context managers. If a particular context manager pertains only the process at hand, we don't really care, because our process is supposed to vanish. If a context manager changes external state such as tempfile.NamedTemporaryFile, this is very bad and unexpected. We need to ensure that such cleanup is not performed. This also simplifies the test suite that had to emulate this behaviour already as pytest uses a context manager.
2024-01-22provide default for IDAllocation.allocation map arg targetHelmut Grohne
Most frequently, the root user is allocated.
2024-01-19add convenience function unshare_user_idmap_nohelperHelmut Grohne
2024-01-18initial checkinHelmut Grohne