_dup               40 maint/gnulib/lib/dup.c       result = _dup (fd);
_dup               52 maint/gnulib/lib/dup.c #  define dup_nothrow _dup
_dup              446 maint/gnulib/lib/unistd.in.h #   define dup _dup
_dup              466 maint/gnulib/lib/unistd.in.h #   define dup _dup