1/* Define POSIX options for Linux.
2 Copyright (C) 1996-2026 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#ifndef _BITS_POSIX_OPT_H
20#define _BITS_POSIX_OPT_H 1
21
22/* Job control is supported. */
23#define _POSIX_JOB_CONTROL 1
24
25/* Processes have a saved set-user-ID and a saved set-group-ID. */
26#define _POSIX_SAVED_IDS 1
27
28/* Priority scheduling is not supported with the correct semantics,
29 but GNU/Linux applications expect that the corresponding interfaces
30 are available, even though the semantics do not meet the POSIX
31 requirements. See glibc bug 14829. */
32#define _POSIX_PRIORITY_SCHEDULING 200809L
33
34/* Synchronizing file data is supported. */
35#define _POSIX_SYNCHRONIZED_IO 200809L
36
37/* The fsync function is present. */
38#define _POSIX_FSYNC 200809L
39
40/* Mapping of files to memory is supported. */
41#define _POSIX_MAPPED_FILES 200809L
42
43/* Locking of all memory is supported. */
44#define _POSIX_MEMLOCK 200809L
45
46/* Locking of ranges of memory is supported. */
47#define _POSIX_MEMLOCK_RANGE 200809L
48
49/* Setting of memory protections is supported. */
50#define _POSIX_MEMORY_PROTECTION 200809L
51
52/* Some filesystems allow all users to change file ownership. */
53#define _POSIX_CHOWN_RESTRICTED 0
54
55/* `c_cc' member of 'struct termios' structure can be disabled by
56 using the value _POSIX_VDISABLE. */
57#define _POSIX_VDISABLE 0
58
59/* Filenames are not silently truncated. */
60#define _POSIX_NO_TRUNC 1
61
62/* X/Open realtime support is available. */
63#define _XOPEN_REALTIME 1
64
65/* X/Open thread realtime support is available. */
66#define _XOPEN_REALTIME_THREADS 1
67
68/* XPG4.2 shared memory is supported. */
69#define _XOPEN_SHM 1
70
71/* Tell we have POSIX threads. */
72#define _POSIX_THREADS 200809L
73
74/* We have the reentrant functions described in POSIX. */
75#define _POSIX_REENTRANT_FUNCTIONS 1
76#define _POSIX_THREAD_SAFE_FUNCTIONS 200809L
77
78/* We provide priority scheduling for threads. */
79#define _POSIX_THREAD_PRIORITY_SCHEDULING 200809L
80
81/* We support user-defined stack sizes. */
82#define _POSIX_THREAD_ATTR_STACKSIZE 200809L
83
84/* We support user-defined stacks. */
85#define _POSIX_THREAD_ATTR_STACKADDR 200809L
86
87/* We support priority inheritance. */
88#define _POSIX_THREAD_PRIO_INHERIT 200809L
89
90/* We support priority protection, though only for non-robust
91 mutexes. */
92#define _POSIX_THREAD_PRIO_PROTECT 200809L
93
94#ifdef __USE_XOPEN2K8
95/* We support priority inheritance for robust mutexes. */
96# define _POSIX_THREAD_ROBUST_PRIO_INHERIT 200809L
97
98/* We do not support priority protection for robust mutexes. */
99# define _POSIX_THREAD_ROBUST_PRIO_PROTECT -1
100#endif
101
102/* We support POSIX.1b semaphores. */
103#define _POSIX_SEMAPHORES 200809L
104
105/* Real-time signals are supported. */
106#define _POSIX_REALTIME_SIGNALS 200809L
107
108/* We support asynchronous I/O. */
109#define _POSIX_ASYNCHRONOUS_IO 200809L
110#define _POSIX_ASYNC_IO 1
111/* Alternative name for Unix98. */
112#define _LFS_ASYNCHRONOUS_IO 1
113/* Support for prioritization is also available. */
114#define _POSIX_PRIORITIZED_IO 200809L
115
116/* The LFS support in asynchronous I/O is also available. */
117#define _LFS64_ASYNCHRONOUS_IO 1
118
119/* The rest of the LFS is also available. */
120#define _LFS_LARGEFILE 1
121#define _LFS64_LARGEFILE 1
122#define _LFS64_STDIO 1
123
124/* POSIX shared memory objects are implemented. */
125#define _POSIX_SHARED_MEMORY_OBJECTS 200809L
126
127/* CPU-time clocks support needs to be checked at runtime. */
128#define _POSIX_CPUTIME 0
129
130/* Clock support in threads must be also checked at runtime. */
131#define _POSIX_THREAD_CPUTIME 0
132
133/* GNU libc provides regular expression handling. */
134#define _POSIX_REGEXP 1
135
136/* Reader/Writer locks are available. */
137#define _POSIX_READER_WRITER_LOCKS 200809L
138
139/* We have a POSIX shell. */
140#define _POSIX_SHELL 1
141
142/* We support the Timeouts option. */
143#define _POSIX_TIMEOUTS 200809L
144
145/* We support spinlocks. */
146#define _POSIX_SPIN_LOCKS 200809L
147
148/* The `spawn' function family is supported. */
149#define _POSIX_SPAWN 200809L
150
151/* We have POSIX timers. */
152#define _POSIX_TIMERS 200809L
153
154/* The barrier functions are available. */
155#define _POSIX_BARRIERS 200809L
156
157/* POSIX message queues are available. */
158#define _POSIX_MESSAGE_PASSING 200809L
159
160/* Thread process-shared synchronization is supported. */
161#define _POSIX_THREAD_PROCESS_SHARED 200809L
162
163/* The monotonic clock might be available. */
164#define _POSIX_MONOTONIC_CLOCK 0
165
166/* The clock selection interfaces are available. */
167#define _POSIX_CLOCK_SELECTION 200809L
168
169/* Advisory information interfaces are available. */
170#define _POSIX_ADVISORY_INFO 200809L
171
172/* IPv6 support is available. */
173#define _POSIX_IPV6 200809L
174
175/* Raw socket support is available. */
176#define _POSIX_RAW_SOCKETS 200809L
177
178/* We have at least one terminal. */
179#define _POSIX2_CHAR_TERM 200809L
180
181/* Neither process nor thread sporadic server interfaces is available. */
182#define _POSIX_SPORADIC_SERVER -1
183#define _POSIX_THREAD_SPORADIC_SERVER -1
184
185/* trace.h is not available. */
186#define _POSIX_TRACE -1
187#define _POSIX_TRACE_EVENT_FILTER -1
188#define _POSIX_TRACE_INHERIT -1
189#define _POSIX_TRACE_LOG -1
190
191/* Typed memory objects are not available. */
192#define _POSIX_TYPED_MEMORY_OBJECTS -1
193
194#endif /* bits/posix_opt.h */