22 struct stdio_dev {  struct
29 	int (*start)(struct stdio_dev *dev);	/* To start the device */  argument
30 	int (*stop)(struct stdio_dev *dev);	/* To stop the device */  argument
35 	void (*putc)(struct stdio_dev *dev, const char c);  argument
37 	void (*puts)(struct stdio_dev *dev, const char *s);  argument
40 	void (*clear)(struct stdio_dev *dev);  argument
45 	int (*tstc)(struct stdio_dev *dev);  argument
46 	int (*getc)(struct stdio_dev *dev);	/* To get that char */  argument
75 extern struct stdio_dev *stdio_devices[];
81 int	stdio_register (struct stdio_dev * dev);
82 int stdio_register_dev(struct stdio_dev *dev, struct stdio_dev **devp);
109 int stdio_deregister_dev(struct stdio_dev *dev, int force);
112 struct stdio_dev* stdio_get_by_name(const char* name);
113 struct stdio_dev* stdio_clone(struct stdio_dev *dev);