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