kmsg.c (002345925e6c45861f60db6f4fc6236713fd8847) kmsg.c (d78ca3cd733d8a2c3dcd88471beb1a15d973eed8)
1/*
2 * linux/fs/proc/kmsg.c
3 *
4 * Copyright (C) 1992 by Linus Torvalds
5 *
6 */
7
8#include <linux/types.h>

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16
17#include <asm/uaccess.h>
18#include <asm/io.h>
19
20extern wait_queue_head_t log_wait;
21
22static int kmsg_open(struct inode * inode, struct file * file)
23{
1/*
2 * linux/fs/proc/kmsg.c
3 *
4 * Copyright (C) 1992 by Linus Torvalds
5 *
6 */
7
8#include <linux/types.h>

--- 7 unchanged lines hidden (view full) ---

16
17#include <asm/uaccess.h>
18#include <asm/io.h>
19
20extern wait_queue_head_t log_wait;
21
22static int kmsg_open(struct inode * inode, struct file * file)
23{
24 return do_syslog(1, NULL, 0, SYSLOG_FROM_FILE);
24 return do_syslog(SYSLOG_ACTION_OPEN, NULL, 0, SYSLOG_FROM_FILE);
25}
26
27static int kmsg_release(struct inode * inode, struct file * file)
28{
25}
26
27static int kmsg_release(struct inode * inode, struct file * file)
28{
29 (void) do_syslog(0, NULL, 0, SYSLOG_FROM_FILE);
29 (void) do_syslog(SYSLOG_ACTION_CLOSE, NULL, 0, SYSLOG_FROM_FILE);
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) &&
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) &&
37 !do_syslog(9, NULL, 0, SYSLOG_FROM_FILE))
37 !do_syslog(SYSLOG_ACTION_SIZE_UNREAD, NULL, 0, SYSLOG_FROM_FILE))
38 return -EAGAIN;
38 return -EAGAIN;
39 return do_syslog(2, buf, count, SYSLOG_FROM_FILE);
39 return do_syslog(SYSLOG_ACTION_READ, buf, count, SYSLOG_FROM_FILE);
40}
41
42static unsigned int kmsg_poll(struct file *file, poll_table *wait)
43{
44 poll_wait(file, &log_wait, wait);
40}
41
42static unsigned int kmsg_poll(struct file *file, poll_table *wait)
43{
44 poll_wait(file, &log_wait, wait);
45 if (do_syslog(9, NULL, 0, SYSLOG_FROM_FILE))
45 if (do_syslog(SYSLOG_ACTION_SIZE_UNREAD, NULL, 0, SYSLOG_FROM_FILE))
46 return POLLIN | POLLRDNORM;
47 return 0;
48}
49
50
51static const struct file_operations proc_kmsg_operations = {
52 .read = kmsg_read,
53 .poll = kmsg_poll,
54 .open = kmsg_open,
55 .release = kmsg_release,
56};
57
58static int __init proc_kmsg_init(void)
59{
60 proc_create("kmsg", S_IRUSR, NULL, &proc_kmsg_operations);
61 return 0;
62}
63module_init(proc_kmsg_init);
46 return POLLIN | POLLRDNORM;
47 return 0;
48}
49
50
51static const struct file_operations proc_kmsg_operations = {
52 .read = kmsg_read,
53 .poll = kmsg_poll,
54 .open = kmsg_open,
55 .release = kmsg_release,
56};
57
58static int __init proc_kmsg_init(void)
59{
60 proc_create("kmsg", S_IRUSR, NULL, &proc_kmsg_operations);
61 return 0;
62}
63module_init(proc_kmsg_init);