1/* Minimum guaranteed maximum values for system limits. Linux version.
2 Copyright (C) 1993-2024 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public License as
7 published by the Free Software Foundation; either version 2.1 of the
8 License, or (at your option) any later version.
9
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; see the file COPYING.LIB. If
17 not, see <https://www.gnu.org/licenses/>. */
18
19/* The kernel header pollutes the namespace with the NR_OPEN symbol
20 and defines LINK_MAX although filesystems have different maxima. A
21 similar thing is true for OPEN_MAX: the limit can be changed at
22 runtime and therefore the macro must not be defined. Remove this
23 after including the header if necessary. */
24#ifndef NR_OPEN
25# define __undef_NR_OPEN
26#endif
27#ifndef LINK_MAX
28# define __undef_LINK_MAX
29#endif
30#ifndef OPEN_MAX
31# define __undef_OPEN_MAX
32#endif
33#ifndef ARG_MAX
34# define __undef_ARG_MAX
35#endif
36
37/* The kernel sources contain a file with all the needed information. */
38#include <linux/limits.h>
39
40/* Have to remove NR_OPEN? */
41#ifdef __undef_NR_OPEN
42# undef NR_OPEN
43# undef __undef_NR_OPEN
44#endif
45/* Have to remove LINK_MAX? */
46#ifdef __undef_LINK_MAX
47# undef LINK_MAX
48# undef __undef_LINK_MAX
49#endif
50/* Have to remove OPEN_MAX? */
51#ifdef __undef_OPEN_MAX
52# undef OPEN_MAX
53# undef __undef_OPEN_MAX
54#endif
55/* Have to remove ARG_MAX? */
56#ifdef __undef_ARG_MAX
57# undef ARG_MAX
58# undef __undef_ARG_MAX
59#endif
60
61/* The number of data keys per process. */
62#define _POSIX_THREAD_KEYS_MAX 128
63/* This is the value this implementation supports. */
64#define PTHREAD_KEYS_MAX 1024
65
66/* Controlling the iterations of destructors for thread-specific data. */
67#define _POSIX_THREAD_DESTRUCTOR_ITERATIONS 4
68/* Number of iterations this implementation does. */
69#define PTHREAD_DESTRUCTOR_ITERATIONS _POSIX_THREAD_DESTRUCTOR_ITERATIONS
70
71/* The number of threads per process. */
72#define _POSIX_THREAD_THREADS_MAX 64
73/* We have no predefined limit on the number of threads. */
74#undef PTHREAD_THREADS_MAX
75
76/* Maximum amount by which a process can decrease its asynchronous I/O
77 priority level. */
78#define AIO_PRIO_DELTA_MAX 20
79
80/* Arrange for the definition of PTHREAD_STACK_MIN. */
81#include <bits/pthread_stack_min-dynamic.h>
82
83/* Maximum number of timer expiration overruns. */
84#define DELAYTIMER_MAX 2147483647
85
86/* Maximum tty name length. */
87#define TTY_NAME_MAX 32
88
89/* Maximum login name length. This is arbitrary. */
90#define LOGIN_NAME_MAX 256
91
92/* Maximum host name length. */
93#define HOST_NAME_MAX 64
94
95/* Maximum message queue priority level. */
96#define MQ_PRIO_MAX 32768
97
98/* Maximum value the semaphore can have. */
99#define SEM_VALUE_MAX (2147483647)
100