1/*-
2 * SPDX-License-Identifier: BSD-3-Clause
3 *
4 * Copyright (c) 1989, 1993
5 * The Regents of the University of California. All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the University nor the names of its contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 */
31
32#ifndef _SYS_UNISTD_H_
33#define _SYS_UNISTD_H_
34
35#include <sys/cdefs.h>
36
37/*
38 * POSIX options and option groups we unconditionally do or don't
39 * implement. Those options which are implemented (or not) entirely
40 * in user mode are defined in <unistd.h>. Please keep this list in
41 * alphabetical order.
42 *
43 * Anything which is defined as zero below **must** have an
44 * implementation for the corresponding sysconf() which is able to
45 * determine conclusively whether or not the feature is supported.
46 * Anything which is defined as other than -1 below **must** have
47 * complete headers, types, and function declarations as specified by
48 * the POSIX standard; however, if the relevant sysconf() function
49 * returns -1, the functions may be stubbed out.
50 */
51#define _POSIX_ADVISORY_INFO 200112L
52#define _POSIX_ASYNCHRONOUS_IO 200112L
53#define _POSIX_CHOWN_RESTRICTED 1
54#define _POSIX_CLOCK_SELECTION (-1)
55#define _POSIX_CPUTIME 200112L
56#define _POSIX_FSYNC 200112L
57#define _POSIX_IPV6 0
58#define _POSIX_JOB_CONTROL 1
59#define _POSIX_MAPPED_FILES 200112L
60#define _POSIX_MEMLOCK (-1)
61#define _POSIX_MEMLOCK_RANGE 200112L
62#define _POSIX_MEMORY_PROTECTION 200112L
63#define _POSIX_MESSAGE_PASSING 200112L
64#define _POSIX_MONOTONIC_CLOCK 200112L
65#define _POSIX_NO_TRUNC 1
66#define _POSIX_PRIORITIZED_IO (-1)
67#define _POSIX_PRIORITY_SCHEDULING 0
68#define _POSIX_RAW_SOCKETS 200112L
69#define _POSIX_REALTIME_SIGNALS 200112L
70#define _POSIX_SEMAPHORES 200112L
71#define _POSIX_SHARED_MEMORY_OBJECTS 200112L
72#define _POSIX_SPORADIC_SERVER (-1)
73#define _POSIX_SYNCHRONIZED_IO (-1)
74#define _POSIX_TIMEOUTS 200112L
75#define _POSIX_TIMERS 200112L
76#define _POSIX_TYPED_MEMORY_OBJECTS (-1)
77#define _POSIX_VDISABLE 0xff
78
79#if __XSI_VISIBLE
80#define _XOPEN_SHM 1
81#define _XOPEN_STREAMS (-1)
82#endif
83
84/*
85 * Although we have saved user/group IDs, we do not use them in setuid
86 * as described in POSIX 1003.1, because the feature does not work for
87 * root. We use the saved IDs in seteuid/setegid, which are not currently
88 * part of the POSIX 1003.1 specification. XXX revisit for 1003.1-2001
89 * as this is now mandatory.
90 */
91#ifdef _NOT_AVAILABLE
92#define _POSIX_SAVED_IDS 1 /* saved set-user-ID and set-group-ID */
93#endif
94
95/* Define the POSIX.1 version we target for compliance. */
96#define _POSIX_VERSION 200809L
97
98/* access function */
99#define F_OK 0 /* test for existence of file */
100#define X_OK 0x01 /* test for execute or search permission */
101#define W_OK 0x02 /* test for write permission */
102#define R_OK 0x04 /* test for read permission */
103
104/* whence values for lseek(2) */
105#ifndef SEEK_SET
106#define SEEK_SET 0 /* set file offset to offset */
107#define SEEK_CUR 1 /* set file offset to current plus offset */
108#define SEEK_END 2 /* set file offset to EOF plus offset */
109#endif
110#if __BSD_VISIBLE
111#define SEEK_DATA 3 /* set file offset to next data past offset */
112#define SEEK_HOLE 4 /* set file offset to next hole past offset */
113#endif
114
115#ifndef _POSIX_SOURCE
116/* whence values for lseek(2); renamed by POSIX 1003.1 */
117#define L_SET SEEK_SET
118#define L_INCR SEEK_CUR
119#define L_XTND SEEK_END
120#endif
121
122/* configurable pathname variables */
123#define _PC_LINK_MAX 1
124#define _PC_MAX_CANON 2
125#define _PC_MAX_INPUT 3
126#define _PC_NAME_MAX 4
127#define _PC_PATH_MAX 5
128#define _PC_PIPE_BUF 6
129#define _PC_CHOWN_RESTRICTED 7
130#define _PC_NO_TRUNC 8
131#define _PC_VDISABLE 9
132
133#if __POSIX_VISIBLE >= 199309
134#define _PC_ASYNC_IO 53
135#define _PC_PRIO_IO 54
136#define _PC_SYNC_IO 55
137#endif
138
139#if __POSIX_VISIBLE >= 200112
140#define _PC_ALLOC_SIZE_MIN 10
141#define _PC_FILESIZEBITS 12
142#define _PC_REC_INCR_XFER_SIZE 14
143#define _PC_REC_MAX_XFER_SIZE 15
144#define _PC_REC_MIN_XFER_SIZE 16
145#define _PC_REC_XFER_ALIGN 17
146#define _PC_SYMLINK_MAX 18
147#endif
148
149#if __BSD_VISIBLE
150#define _PC_ACL_EXTENDED 59
151#define _PC_ACL_PATH_MAX 60
152#define _PC_CAP_PRESENT 61
153#define _PC_INF_PRESENT 62
154#define _PC_MAC_PRESENT 63
155#define _PC_ACL_NFS4 64
156#define _PC_DEALLOC_PRESENT 65
157#define _PC_NAMEDATTR_ENABLED 66
158#define _PC_HAS_NAMEDATTR 67
159#define _PC_XATTR_ENABLED _PC_NAMEDATTR_ENABLED /* Solaris Compatible */
160#define _PC_XATTR_EXISTS _PC_HAS_NAMEDATTR /* Solaris Compatible */
161#define _PC_HAS_HIDDENSYSTEM 68
162#define _PC_CLONE_BLKSIZE 69
163#endif
164
165/* From OpenSolaris, used by SEEK_DATA/SEEK_HOLE. */
166#define _PC_MIN_HOLE_SIZE 21
167
168#if __BSD_VISIBLE
169/*
170 * rfork() options.
171 *
172 * XXX currently, some operations without RFPROC set are not supported.
173 */
174#define RFNAMEG (1<<0) /* UNIMPL new plan9 `name space' */
175#define RFENVG (1<<1) /* UNIMPL copy plan9 `env space' */
176#define RFFDG (1<<2) /* copy fd table */
177#define RFNOTEG (1<<3) /* UNIMPL create new plan9 `note group' */
178#define RFPROC (1<<4) /* change child (else changes curproc) */
179#define RFMEM (1<<5) /* share `address space' */
180#define RFNOWAIT (1<<6) /* give child to init */
181#define RFCNAMEG (1<<10) /* UNIMPL zero plan9 `name space' */
182#define RFCENVG (1<<11) /* UNIMPL zero plan9 `env space' */
183#define RFCFDG (1<<12) /* close all fds, zero fd table */
184#define RFTHREAD (1<<13) /* enable kernel thread support */
185#define RFSIGSHARE (1<<14) /* share signal handlers */
186#define RFLINUXTHPN (1<<16) /* do linux clone exit parent notification */
187#define RFSTOPPED (1<<17) /* leave child in a stopped state */
188#define RFHIGHPID (1<<18) /* use a pid higher than 10 (idleproc) */
189#define RFTSIGZMB (1<<19) /* select signal for exit parent notification */
190#define RFTSIGSHIFT 20 /* selected signal number is in bits 20-27 */
191#define RFTSIGMASK 0xFF
192#define RFTSIGNUM(flags) (((flags) >> RFTSIGSHIFT) & RFTSIGMASK)
193#define RFTSIGFLAGS(signum) ((signum) << RFTSIGSHIFT)
194#define RFPROCDESC (1<<28) /* return a process descriptor */
195/* kernel: parent sleeps until child exits (vfork) */
196#define RFPPWAIT (1<<31)
197/* user: vfork(2) semantics, clear signals */
198#define RFSPAWN (1U<<31)
199#define RFFLAGS (RFFDG | RFPROC | RFMEM | RFNOWAIT | RFCFDG | \
200 RFTHREAD | RFSIGSHARE | RFLINUXTHPN | RFSTOPPED | RFHIGHPID | RFTSIGZMB | \
201 RFPROCDESC | RFSPAWN | RFPPWAIT)
202#define RFKERNELONLY (RFSTOPPED | RFHIGHPID | RFPROCDESC)
203
204/* kcmp() options. */
205#define KCMP_FILE 100
206#define KCMP_FILEOBJ 101
207#define KCMP_FILES 102
208#define KCMP_SIGHAND 103
209#define KCMP_VM 104
210
211#define SWAPOFF_FORCE 0x00000001
212
213/*
214 * close_range() options.
215 */
216#define CLOSE_RANGE_CLOEXEC (1<<2)
217#define CLOSE_RANGE_CLOFORK (1<<3)
218
219/*
220 * copy_file_range flags visible to user space.
221 * High order 8 bits reserved for kernel flags.
222 * Allocate from bit 23 down, to try and avoid conflicts with
223 * future Linux flags.
224 */
225#define COPY_FILE_RANGE_CLONE 0x00800000 /* Require cloning. */
226#define COPY_FILE_RANGE_USERFLAGS (COPY_FILE_RANGE_CLONE)
227
228#endif /* __BSD_VISIBLE */
229
230#endif /* !_SYS_UNISTD_H_ */