1/*
 2 * Copyright (C) 2000, 2001 Jeff Dike (jdike@karaya.com)
 3 * Licensed under the GPL
 4 */
 5
 6#ifndef __CHAN_USER_H__
 7#define __CHAN_USER_H__
 8
 9#include "init.h"
10
11struct chan_opts {
12	void (*const announce)(char *dev_name, int dev);
13	char *xterm_title;
14	const int raw;
15};
16
17enum chan_init_pri { INIT_STATIC, INIT_ALL, INIT_ONE };
18
19struct chan_ops {
20	char *type;
21	void *(*init)(char *, int, const struct chan_opts *);
22	int (*open)(int, int, int, void *, char **);
23	void (*close)(int, void *);
24	int (*read)(int, char *, void *);
25	int (*write)(int, const char *, int, void *);
26	int (*console_write)(int, const char *, int);
27	int (*window_size)(int, void *, unsigned short *, unsigned short *);
28	void (*free)(void *);
29	int winch;
30};
31
32extern const struct chan_ops fd_ops, null_ops, port_ops, pts_ops, pty_ops,
33	tty_ops, xterm_ops;
34
35extern void generic_close(int fd, void *unused);
36extern int generic_read(int fd, char *c_out, void *unused);
37extern int generic_write(int fd, const char *buf, int n, void *unused);
38extern int generic_console_write(int fd, const char *buf, int n);
39extern int generic_window_size(int fd, void *unused, unsigned short *rows_out,
40			       unsigned short *cols_out);
41extern void generic_free(void *data);
42
43struct tty_struct;
44extern void register_winch(int fd,  struct tty_struct *tty);
45extern void register_winch_irq(int fd, int tty_fd, int pid,
46			       struct tty_struct *tty, unsigned long stack);
47
48#define __channel_help(fn, prefix) \
49__uml_help(fn, prefix "[0-9]*=<channel description>\n" \
50"    Attach a console or serial line to a host channel.  See\n" \
51"    http://user-mode-linux.sourceforge.net/old/input.html for a complete\n" \
52"    description of this switch.\n\n" \
53);
54
55#endif