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[3.12] gh-109981: Fix support.fd_count() on macOS 14 (GH-112797)#112824
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Use scanning "/dev/fd/" on macOS in support.fd_count(). That's both more efficient than scanning all possible file descriptors, and avoids crashing the interpreter when there are open "guarded" file descriptors."Guarded" file descriptors are a macOS feature where file descriptors used by system libraries are marked and cause hard crashes when used by "user" code.(cherry picked from commit953ee62)Co-authored-by: Ronald Oussoren <ronaldoussoren@mac.com>Co-authored-by: Victor Stinner <vstinner@python.org>
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Use scanning "/dev/fd/" on macOS in support.fd_count(). That's both more efficient than scanning all possible file descriptors, and avoids crashing the interpreter when there are open "guarded" file descriptors.
"Guarded" file descriptors are a macOS feature where file descriptors used by system libraries are marked and cause hard crashes when used by "user" code.
(cherry picked from commit953ee62)
Co-authored-by: Ronald Oussorenronaldoussoren@mac.com
Co-authored-by: Victor Stinnervstinner@python.org