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625dce659a
This is the utility changes from #9968, which were easier to rebase first. I (@Ericson2314) didn't write this code; I just rebased it. Co-Authored-By: Artemis Tosini <me@artem.ist> Co-Authored-By: Audrey Dutcher <audrey@rhelmot.io>
35 lines
692 B
C++
35 lines
692 B
C++
#pragma once
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///@file
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#include <optional>
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#include "nix/util/types.hh"
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namespace nix {
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/**
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* Save the current mount namespace. Ignored if called more than
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* once.
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*/
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void saveMountNamespace();
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/**
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* Restore the mount namespace saved by saveMountNamespace(). Ignored
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* if saveMountNamespace() was never called.
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*/
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void restoreMountNamespace();
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/**
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* Cause this thread to try to not share any FS attributes with the main
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* thread, because this causes setns() in restoreMountNamespace() to
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* fail.
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*
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* This is best effort -- EPERM and ENOSYS failures are just ignored.
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*/
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void tryUnshareFilesystem();
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bool userNamespacesSupported();
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bool mountAndPidNamespacesSupported();
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}
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