// SPDX-License-Identifier: GPL-2.0/* * Copyright (C) 2002 - 2007 Jeff Dike (jdike@{linux.intel,addtoit}.com) */ #include <stddef.h>#include <errno.h>#include <fcntl.h>#include "chan_user.h"#include <os.h> /* This address is used only as a unique identifier */static int null_chan; static void *null_init(char *str, int device, const struct chan_opts *opts){	return &null_chan;} static int null_open(int input, int output, int primary, void *d,		     char **dev_out){	int fd; 	*dev_out = NULL; 	fd = open(DEV_NULL, O_RDWR);	return (fd < 0) ? -errno : fd;} static int null_read(int fd, __u8 *c_out, void *unused){	return -ENODEV;} static void null_free(void *data){} const struct chan_ops null_ops = {	.type		= "null",	.init		= null_init,	.open		= null_open,	.close		= generic_close,	.read		= null_read,	.write		= generic_write,	.console_write	= generic_console_write,	.window_size	= generic_window_size,	.free		= null_free,	.winch		= 0,};