2002-06-25 Roland McGrath <roland@frob.com>

	* main.c (trivfs_runtime_argp): New variable.
	(options): Add --name/-N and --type/-T options.
	(parse_opt): Collect parsed options in temporary storage and apply
	them only at final success.  For T_HURDIO, allow absent arg.
	For non-startup parsing call, allow any missing args.
	(tty_type_names): New const variable.
	(trivfs_append_args): New function.
	(main): Open underlying node with O_RDWR.
	* hurdio.c (wait_for_dtr): If tty_arg is null, use termctl->underlying
	instead of opening a node by name.
	(hurdio_desert_dtr): If tty_arg is null, don't deallocate ioport.

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