1/*
2 *  linux/fs/proc/kmsg.c
3 *
4 *  Copyright (C) 1992  by Linus Torvalds
5 *
6 */
7
8#include <linux/types.h>
9#include <linux/errno.h>
10#include <linux/time.h>
11#include <linux/kernel.h>
12#include <linux/poll.h>
13#include <linux/fs.h>
14
15#include <asm/uaccess.h>
16#include <asm/io.h>
17
18extern wait_queue_head_t log_wait;
19
20extern int do_syslog(int type, char __user *bug, int count);
21
22static int kmsg_open(struct inode * inode, struct file * file)
23{
24	return do_syslog(1,NULL,0);
25}
26
27static int kmsg_release(struct inode * inode, struct file * file)
28{
29	(void) do_syslog(0,NULL,0);
30	return 0;
31}
32
33static ssize_t kmsg_read(struct file *file, char __user *buf,
34			 size_t count, loff_t *ppos)
35{
36	if ((file->f_flags & O_NONBLOCK) && !do_syslog(9, NULL, 0))
37		return -EAGAIN;
38	return do_syslog(2, buf, count);
39}
40
41static unsigned int kmsg_poll(struct file *file, poll_table *wait)
42{
43	poll_wait(file, &log_wait, wait);
44	if (do_syslog(9, NULL, 0))
45		return POLLIN | POLLRDNORM;
46	return 0;
47}
48
49
50const struct file_operations proc_kmsg_operations = {
51	.read		= kmsg_read,
52	.poll		= kmsg_poll,
53	.open		= kmsg_open,
54	.release	= kmsg_release,
55};
56