1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* 3 * Copyright (C) 2000, 2001 Jeff Dike (jdike@karaya.com) 4 */ 5 6 #ifndef __CHAN_USER_H__ 7 #define __CHAN_USER_H__ 8 9 #include <init.h> 10 #include <linux/types.h> 11 12 struct chan_opts { 13 void (*const announce)(char *dev_name, int dev); 14 char *xterm_title; 15 int raw; 16 }; 17 18 struct chan_ops { 19 char *type; 20 void *(*init)(char *, int, const struct chan_opts *); 21 int (*open)(int, int, int, void *, char **); 22 void (*close)(int, void *); 23 int (*read)(int, __u8 *, void *); 24 int (*write)(int, const __u8 *, size_t, void *); 25 int (*console_write)(int, const char *, int); 26 int (*window_size)(int, void *, unsigned short *, unsigned short *); 27 void (*free)(void *); 28 int winch; 29 }; 30 31 extern const struct chan_ops fd_ops, null_ops, port_ops, pts_ops, pty_ops, 32 tty_ops, xterm_ops; 33 34 extern void generic_close(int fd, void *unused); 35 extern int generic_read(int fd, __u8 *c_out, void *unused); 36 extern int generic_write(int fd, const __u8 *buf, size_t n, void *unused); 37 extern int generic_console_write(int fd, const char *buf, int n); 38 extern int generic_window_size(int fd, void *unused, unsigned short *rows_out, 39 unsigned short *cols_out); 40 extern void generic_free(void *data); 41 42 struct tty_port; 43 extern void register_winch(int fd, struct tty_port *port); 44 extern void register_winch_irq(int fd, int tty_fd, int pid, 45 struct tty_port *port, unsigned long stack); 46 47 #define __channel_help(fn, prefix) \ 48 __uml_help(fn, prefix "[0-9]*=<channel description>\n" \ 49 " Attach a console or serial line to a host channel. See\n" \ 50 " http://user-mode-linux.sourceforge.net/old/input.html for a complete\n" \ 51 " description of this switch.\n\n" \ 52 ); 53 54 #endif 55