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))