Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
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
11static int null_chan;
12
13static void *null_init(char *str, int device, struct chan_opts *opts)
14{
15 return(&null_chan);
16}
17
18static int null_open(int input, int output, int primary, void *d,
19 char **dev_out)
20{
21 *dev_out = NULL;
22 return(os_open_file(DEV_NULL, of_rdwr(OPENFLAGS()), 0));
23}
24
25static int null_read(int fd, char *c_out, void *unused)
26{
27 return(-ENODEV);
28}
29
30static void null_free(void *data)
31{
32}
33
34struct chan_ops null_ops = {
35 .type = "null",
36 .init = null_init,
37 .open = null_open,
38 .close = generic_close,
39 .read = null_read,
40 .write = generic_write,
41 .console_write = generic_console_write,
42 .window_size = generic_window_size,
43 .free = null_free,
44 .winch = 0,
45};
46
47/*
48 * Overrides for Emacs so that we follow Linus's tabbing style.
49 * Emacs will notice this stuff at the end of the file and automatically
50 * adjust the settings for this buffer only. This must remain at the end
51 * of the file.
52 * ---------------------------------------------------------------------------
53 * Local variables:
54 * c-file-style: "linux"
55 * End:
56 */