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 /* Close the log.  Currently a NOP. */
12 #define SYSLOG_ACTION_CLOSE          0
13 /* Open the log. Currently a NOP. */
14 #define SYSLOG_ACTION_OPEN           1
15 /* Read from the log. */
16 #define SYSLOG_ACTION_READ           2
17 /* Read all messages remaining in the ring buffer. */
18 #define SYSLOG_ACTION_READ_ALL       3
19 /* Read and clear all messages remaining in the ring buffer */
20 #define SYSLOG_ACTION_READ_CLEAR     4
21 /* Clear ring buffer. */
22 #define SYSLOG_ACTION_CLEAR          5
23 /* Disable printk's to console */
24 #define SYSLOG_ACTION_CONSOLE_OFF    6
25 /* Enable printk's to console */
26 #define SYSLOG_ACTION_CONSOLE_ON     7
27 /* Set level of messages printed to console */
28 #define SYSLOG_ACTION_CONSOLE_LEVEL  8
29 /* Return number of unread characters in the log buffer */
30 #define SYSLOG_ACTION_SIZE_UNREAD    9
31 /* Return size of the log buffer */
32 #define SYSLOG_ACTION_SIZE_BUFFER   10
33 
34 #define SYSLOG_FROM_READER           0
35 #define SYSLOG_FROM_PROC             1
36 
37 int do_syslog(int type, char __user *buf, int count, int source);
38 
39 #endif /* _LINUX_SYSLOG_H */
40