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	const unsigned long tramp_stack;
16	const int in_kernel;
17};
18
19enum chan_init_pri { INIT_STATIC, INIT_ALL, INIT_ONE };
20
21struct chan_ops {
22	char *type;
23	void *(*init)(char *, int, const struct chan_opts *);
24	int (*open)(int, int, int, void *, char **);
25	void (*close)(int, void *);
26	int (*read)(int, char *, void *);
27	int (*write)(int, const char *, int, void *);
28	int (*console_write)(int, const char *, int);
29	int (*window_size)(int, void *, unsigned short *, unsigned short *);
30	void (*free)(void *);
31	int winch;
32};
33
34extern const struct chan_ops fd_ops, null_ops, port_ops, pts_ops, pty_ops,
35	tty_ops, xterm_ops;
36
37extern void generic_close(int fd, void *unused);
38extern int generic_read(int fd, char *c_out, void *unused);
39extern int generic_write(int fd, const char *buf, int n, void *unused);
40extern int generic_console_write(int fd, const char *buf, int n);
41extern int generic_window_size(int fd, void *unused, unsigned short *rows_out,
42			       unsigned short *cols_out);
43extern void generic_free(void *data);
44
45struct tty_struct;
46extern void register_winch(int fd,  struct tty_struct *tty);
47extern void register_winch_irq(int fd, int tty_fd, int pid, struct tty_struct *tty);
48
49#define __channel_help(fn, prefix) \
50__uml_help(fn, prefix "[0-9]*=<channel description>\n" \
51"    Attach a console or serial line to a host channel.  See\n" \
52"    http://user-mode-linux.sourceforge.net/input.html for a complete\n" \
53"    description of this switch.\n\n" \
54);
55
56#endif
57