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