_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