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* devices.h (FH_ERROR): New value. (iscons_dev): Extend to detect all the console device types. * devices.in: Set aside storage for FH_ERROR. * dtable.cc (dtable::init_std_file_from_handle): Use iscons_dev to detect when device is a console. (fh_alloc): Pass device to console constructor. (build_fh_pc): Short circuit when we detect that the constructor saw an error. * fhandler.h (fhandler_console::fhandler_console): Accept fh_devices parameter. (get_tty_stuff): Change to void. * fhandler_console (fhandler_console::set_unit): Set device to FH_ERROR on attempt to access anything other than the current console. (fhandler_console::get_tty_stuff): Change to void return. (fhandler_console::open): Return EPERM on FH_ERROR device type. (fhandler_console::fhandler_console): Set the device type appropriately before calling get_tty_stuff and rely on that function to reset it if necessary.
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