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os: os.Root: use O_NOFOLLOW_ANY on macOS #73079

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os: os.Root: use O_NOFOLLOW_ANY on macOS#73079
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LibraryProposalIssues describing a requested change to the Go standard library or x/ libraries, but not to a toolNeedsFixThe path to resolution is known, but the work has not been done.OS-DarwinPerformance
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@neild
neild
opened on Mar 27, 2025

macOS 11 and later's openat supports an O_NOFOLLOW_ANY flag which causes resolution to fail if any path component contains a symlink. We can use this to implement a fast-path for os.Root operations in the common case when the path does not contain a symlink.

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    LibraryProposalIssues describing a requested change to the Go standard library or x/ libraries, but not to a toolNeedsFixThe path to resolution is known, but the work has not been done.OS-DarwinPerformance

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