1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 /*  Syslog internals
3  *
4  *  Copyright 2010 Canonical, Ltd.
5  *  Author: Kees Cook <kees.cook@canonical.com>
6  */
7 
8 #ifndef _LINUX_SYSLOG_H
9 #define _LINUX_SYSLOG_H
10 
11 #include <linux/wait.h>
12 
13 /* Close the log.  Currently a NOP. */
14 #define SYSLOG_ACTION_CLOSE          0
15 /* Open the log. Currently a NOP. */
16 #define SYSLOG_ACTION_OPEN           1
17 /* Read from the log. */
18 #define SYSLOG_ACTION_READ           2
19 /* Read all messages remaining in the ring buffer. */
20 #define SYSLOG_ACTION_READ_ALL       3
21 /* Read and clear all messages remaining in the ring buffer */
22 #define SYSLOG_ACTION_READ_CLEAR     4
23 /* Clear ring buffer. */
24 #define SYSLOG_ACTION_CLEAR          5
25 /* Disable printk's to console */
26 #define SYSLOG_ACTION_CONSOLE_OFF    6
27 /* Enable printk's to console */
28 #define SYSLOG_ACTION_CONSOLE_ON     7
29 /* Set level of messages printed to console */
30 #define SYSLOG_ACTION_CONSOLE_LEVEL  8
31 /* Return number of unread characters in the log buffer */
32 #define SYSLOG_ACTION_SIZE_UNREAD    9
33 /* Return size of the log buffer */
34 #define SYSLOG_ACTION_SIZE_BUFFER   10
35 
36 #define SYSLOG_FROM_READER           0
37 #define SYSLOG_FROM_PROC             1
38 
39 int do_syslog(int type, char __user *buf, int count, int source);
40 extern wait_queue_head_t log_wait;
41 
42 #endif /* _LINUX_SYSLOG_H */
43