_dup2              55 maint/gnulib/lib/dup2.c       result = _dup2 (fd, desired_fd);
_dup2              67 maint/gnulib/lib/dup2.c #  define dup2_nothrow _dup2
_dup2             491 maint/gnulib/lib/unistd.in.h #   define dup2 _dup2
_dup2             511 maint/gnulib/lib/unistd.in.h #   define dup2 _dup2