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 * 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;

enum chan_init_pri { INIT_STATIC, INIT_ALL, INIT_ONE };

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_struct;
extern void register_winch(int fd,  struct tty_struct *tty);
extern void register_winch_irq(int fd, int tty_fd, int pid,
                         struct tty_struct *tty, unsigned long stack);

#define __channel_help(fn, prefix) \
__uml_help(fn, prefix "[0-9]*=<channel description>\n" \
"    Attach a console or serial line to a host channel.  See\n" \
"    http://user-mode-linux.sourceforge.net/old/input.html for a complete\n" \
"    description of this switch.\n\n" \


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