/*

   * Copyright (C) 2000, 2001 Jeff Dike (jdike@karaya.com)
   * Licensed under the GPL
   */
  
  #ifndef __CHAN_USER_H__
  #define __CHAN_USER_H__

  #include <init.h>

  
  struct chan_opts {

  	void (*const announce)(char *dev_name, int dev);

  	char *xterm_title;

  	const int raw;

  };

  struct chan_ops {
  	char *type;

  	void *(*init)(char *, int, const struct chan_opts *);

  	int (*open)(int, int, int, void *, char **);
  	void (*close)(int, void *);
  	int (*read)(int, char *, void *);
  	int (*write)(int, const char *, int, void *);

  	int (*console_write)(int, const char *, int);

  	int (*window_size)(int, void *, unsigned short *, unsigned short *);
  	void (*free)(void *);
  	int winch;
  };

  extern const struct chan_ops fd_ops, null_ops, port_ops, pts_ops, pty_ops,
  	tty_ops, xterm_ops;

  
  extern void generic_close(int fd, void *unused);
  extern int generic_read(int fd, char *c_out, void *unused);
  extern int generic_write(int fd, const char *buf, int n, void *unused);

  extern int generic_console_write(int fd, const char *buf, int n);

  extern int generic_window_size(int fd, void *unused, unsigned short *rows_out,
  			       unsigned short *cols_out);
  extern void generic_free(void *data);

  struct tty_port;
  extern void register_winch(int fd,  struct tty_port *port);

  extern void register_winch_irq(int fd, int tty_fd, int pid,

  			       struct tty_port *port, unsigned long stack);

  
  #define __channel_help(fn, prefix) \
  __uml_help(fn, prefix "[0-9]*=<channel description>
  " \
  "    Attach a console or serial line to a host channel.  See
  " \

  "    http://user-mode-linux.sourceforge.net/old/input.html for a complete
  " \

  "    description of this switch.
  
  " \
  );
  
  #endif