1/* Tunable type information.
2
3 Copyright (C) 2016-2020 Free Software Foundation, Inc.
4 This file is part of the GNU C Library.
5
6 The GNU C Library is free software; you can redistribute it and/or
7 modify it under the terms of the GNU Lesser General Public
8 License as published by the Free Software Foundation; either
9 version 2.1 of the License, or (at your option) any later version.
10
11 The GNU C Library is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Lesser General Public License for more details.
15
16 You should have received a copy of the GNU Lesser General Public
17 License along with the GNU C Library; if not, see
18 <https://www.gnu.org/licenses/>. */
19
20#ifndef _TUNABLE_TYPES_H_
21# define _TUNABLE_TYPES_H_
22#include <stddef.h>
23
24typedef enum
25{
26 TUNABLE_TYPE_INT_32,
27 TUNABLE_TYPE_UINT_64,
28 TUNABLE_TYPE_SIZE_T,
29 TUNABLE_TYPE_STRING
30} tunable_type_code_t;
31
32typedef struct
33{
34 tunable_type_code_t type_code;
35 int64_t min;
36 int64_t max;
37} tunable_type_t;
38
39typedef union
40{
41 int64_t numval;
42 const char *strval;
43} tunable_val_t;
44
45typedef void (*tunable_callback_t) (tunable_val_t *);
46
47/* Security level for tunables. This decides what to do with individual
48 tunables for AT_SECURE binaries. */
49typedef enum
50{
51 /* Erase the tunable for AT_SECURE binaries so that child processes don't
52 read it. */
53 TUNABLE_SECLEVEL_SXID_ERASE = 0,
54 /* Ignore the tunable for AT_SECURE binaries, but don't erase it, so that
55 child processes can read it. */
56 TUNABLE_SECLEVEL_SXID_IGNORE = 1,
57 /* Read the tunable. */
58 TUNABLE_SECLEVEL_NONE = 2,
59} tunable_seclevel_t;
60
61
62#endif
63