1/*
2 * Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
3 * Licensed under the GPL
4 */
5
6#include <stdlib.h>
7#include <errno.h>
8#include "chan_user.h"
9#include "os.h"
10
11/* This address is used only as a unique identifer */
12static int null_chan;
13
14static void *null_init(char *str, int device, const struct chan_opts *opts)
15{
16	return(&null_chan);
17}
18
19static int null_open(int input, int output, int primary, void *d,
20		     char **dev_out)
21{
22	*dev_out = NULL;
23	return(os_open_file(DEV_NULL, of_rdwr(OPENFLAGS()), 0));
24}
25
26static int null_read(int fd, char *c_out, void *unused)
27{
28	return(-ENODEV);
29}
30
31static void null_free(void *data)
32{
33}
34
35const struct chan_ops null_ops = {
36	.type		= "null",
37	.init		= null_init,
38	.open		= null_open,
39	.close		= generic_close,
40	.read		= null_read,
41	.write		= generic_write,
42	.console_write	= generic_console_write,
43	.window_size	= generic_window_size,
44	.free		= null_free,
45	.winch		= 0,
46};
47
48/*
49 * Overrides for Emacs so that we follow Linus's tabbing style.
50 * Emacs will notice this stuff at the end of the file and automatically
51 * adjust the settings for this buffer only.  This must remain at the end
52 * of the file.
53 * ---------------------------------------------------------------------------
54 * Local variables:
55 * c-file-style: "linux"
56 * End:
57 */
58