S_IRGRP

Undocumented in source but is binding to C. You might be able to learn more by searching the web for its name.
  1. auto S_IRGRP;
  2. auto S_IRGRP;
    version(!linux && OSX)
    extern (C) const
    auto S_IRGRP = S_IRUSR >> 3;
  3. auto S_IRGRP;

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