protect_fd         87 maint/gnulib/lib/freopen-safer.c   if (protect_in && !protect_fd (STDIN_FILENO))
protect_fd         89 maint/gnulib/lib/freopen-safer.c   else if (protect_out && !protect_fd (STDOUT_FILENO))
protect_fd         91 maint/gnulib/lib/freopen-safer.c   else if (protect_err && !protect_fd (STDERR_FILENO))