"Yes, but what will you do with a..." <- Whatever this function does: https://github.com/dotnet/runtime/blob/958b1e046cbfff5c0bc647f531b4fcf9eb197a6c/src/libraries/Common/src/Interop/Unix/System.Native/Interop.DeviceFiles.cs#L25 Also, what's the thing about `dev_t` not existing on Haiku? It's specified in POSIX: https://pubs.opengroup.org/onlinepubs/9699919799/ And in the Haiku source: https://xref.landonf.org/source/xref/haiku/headers/posix/sys/types.h#35