master
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 * @(#)unistd.h 8.2 (Berkeley) 1/7/94
32 */
33
34#ifndef _SYS_UNISTD_H_
35#define _SYS_UNISTD_H_
36
37#include <sys/cdefs.h>
38
39/*
40 * POSIX options and option groups we unconditionally do or don't
41 * implement. Those options which are implemented (or not) entirely
42 * in user mode are defined in <unistd.h>. Please keep this list in
43 * alphabetical order.
44 *
45 * Anything which is defined as zero below **must** have an
46 * implementation for the corresponding sysconf() which is able to
47 * determine conclusively whether or not the feature is supported.
48 * Anything which is defined as other than -1 below **must** have
49 * complete headers, types, and function declarations as specified by
50 * the POSIX standard; however, if the relevant sysconf() function
51 * returns -1, the functions may be stubbed out.
52 */
53#define _POSIX_ADVISORY_INFO 200112L
54#define _POSIX_ASYNCHRONOUS_IO 200112L
55#define _POSIX_CHOWN_RESTRICTED 1
56#define _POSIX_CLOCK_SELECTION (-1)
57#define _POSIX_CPUTIME 200112L
58#define _POSIX_FSYNC 200112L
59#define _POSIX_IPV6 0
60#define _POSIX_JOB_CONTROL 1
61#define _POSIX_MAPPED_FILES 200112L
62#define _POSIX_MEMLOCK (-1)
63#define _POSIX_MEMLOCK_RANGE 200112L
64#define _POSIX_MEMORY_PROTECTION 200112L
65#define _POSIX_MESSAGE_PASSING 200112L
66#define _POSIX_MONOTONIC_CLOCK 200112L
67#define _POSIX_NO_TRUNC 1
68#define _POSIX_PRIORITIZED_IO (-1)
69#define _POSIX_PRIORITY_SCHEDULING 0
70#define _POSIX_RAW_SOCKETS 200112L
71#define _POSIX_REALTIME_SIGNALS 200112L
72#define _POSIX_SEMAPHORES 200112L
73#define _POSIX_SHARED_MEMORY_OBJECTS 200112L
74#define _POSIX_SPORADIC_SERVER (-1)
75#define _POSIX_SYNCHRONIZED_IO (-1)
76#define _POSIX_TIMEOUTS 200112L
77#define _POSIX_TIMERS 200112L
78#define _POSIX_TYPED_MEMORY_OBJECTS (-1)
79#define _POSIX_VDISABLE 0xff
80
81#if __XSI_VISIBLE
82#define _XOPEN_SHM 1
83#define _XOPEN_STREAMS (-1)
84#endif
85
86/*
87 * Although we have saved user/group IDs, we do not use them in setuid
88 * as described in POSIX 1003.1, because the feature does not work for
89 * root. We use the saved IDs in seteuid/setegid, which are not currently
90 * part of the POSIX 1003.1 specification. XXX revisit for 1003.1-2001
91 * as this is now mandatory.
92 */
93#ifdef _NOT_AVAILABLE
94#define _POSIX_SAVED_IDS 1 /* saved set-user-ID and set-group-ID */
95#endif
96
97/* Define the POSIX.1 version we target for compliance. */
98#define _POSIX_VERSION 200112L
99
100/* access function */
101#define F_OK 0 /* test for existence of file */
102#define X_OK 0x01 /* test for execute or search permission */
103#define W_OK 0x02 /* test for write permission */
104#define R_OK 0x04 /* test for read permission */
105
106/* whence values for lseek(2) */
107#ifndef SEEK_SET
108#define SEEK_SET 0 /* set file offset to offset */
109#define SEEK_CUR 1 /* set file offset to current plus offset */
110#define SEEK_END 2 /* set file offset to EOF plus offset */
111#endif
112#if __BSD_VISIBLE
113#define SEEK_DATA 3 /* set file offset to next data past offset */
114#define SEEK_HOLE 4 /* set file offset to next hole past offset */
115#endif
116
117#ifndef _POSIX_SOURCE
118/* whence values for lseek(2); renamed by POSIX 1003.1 */
119#define L_SET SEEK_SET
120#define L_INCR SEEK_CUR
121#define L_XTND SEEK_END
122#endif
123
124/* configurable pathname variables */
125#define _PC_LINK_MAX 1
126#define _PC_MAX_CANON 2
127#define _PC_MAX_INPUT 3
128#define _PC_NAME_MAX 4
129#define _PC_PATH_MAX 5
130#define _PC_PIPE_BUF 6
131#define _PC_CHOWN_RESTRICTED 7
132#define _PC_NO_TRUNC 8
133#define _PC_VDISABLE 9
134
135#if __POSIX_VISIBLE >= 199309
136#define _PC_ASYNC_IO 53
137#define _PC_PRIO_IO 54
138#define _PC_SYNC_IO 55
139#endif
140
141#if __POSIX_VISIBLE >= 200112
142#define _PC_ALLOC_SIZE_MIN 10
143#define _PC_FILESIZEBITS 12
144#define _PC_REC_INCR_XFER_SIZE 14
145#define _PC_REC_MAX_XFER_SIZE 15
146#define _PC_REC_MIN_XFER_SIZE 16
147#define _PC_REC_XFER_ALIGN 17
148#define _PC_SYMLINK_MAX 18
149#endif
150
151#if __BSD_VISIBLE
152#define _PC_ACL_EXTENDED 59
153#define _PC_ACL_PATH_MAX 60
154#define _PC_CAP_PRESENT 61
155#define _PC_INF_PRESENT 62
156#define _PC_MAC_PRESENT 63
157#define _PC_ACL_NFS4 64
158#define _PC_DEALLOC_PRESENT 65
159#endif
160
161/* From OpenSolaris, used by SEEK_DATA/SEEK_HOLE. */
162#define _PC_MIN_HOLE_SIZE 21
163
164#if __BSD_VISIBLE
165/*
166 * rfork() options.
167 *
168 * XXX currently, some operations without RFPROC set are not supported.
169 */
170#define RFNAMEG (1<<0) /* UNIMPL new plan9 `name space' */
171#define RFENVG (1<<1) /* UNIMPL copy plan9 `env space' */
172#define RFFDG (1<<2) /* copy fd table */
173#define RFNOTEG (1<<3) /* UNIMPL create new plan9 `note group' */
174#define RFPROC (1<<4) /* change child (else changes curproc) */
175#define RFMEM (1<<5) /* share `address space' */
176#define RFNOWAIT (1<<6) /* give child to init */
177#define RFCNAMEG (1<<10) /* UNIMPL zero plan9 `name space' */
178#define RFCENVG (1<<11) /* UNIMPL zero plan9 `env space' */
179#define RFCFDG (1<<12) /* close all fds, zero fd table */
180#define RFTHREAD (1<<13) /* enable kernel thread support */
181#define RFSIGSHARE (1<<14) /* share signal handlers */
182#define RFLINUXTHPN (1<<16) /* do linux clone exit parent notification */
183#define RFSTOPPED (1<<17) /* leave child in a stopped state */
184#define RFHIGHPID (1<<18) /* use a pid higher than 10 (idleproc) */
185#define RFTSIGZMB (1<<19) /* select signal for exit parent notification */
186#define RFTSIGSHIFT 20 /* selected signal number is in bits 20-27 */
187#define RFTSIGMASK 0xFF
188#define RFTSIGNUM(flags) (((flags) >> RFTSIGSHIFT) & RFTSIGMASK)
189#define RFTSIGFLAGS(signum) ((signum) << RFTSIGSHIFT)
190#define RFPROCDESC (1<<28) /* return a process descriptor */
191/* kernel: parent sleeps until child exits (vfork) */
192#define RFPPWAIT (1<<31)
193/* user: vfork(2) semantics, clear signals */
194#define RFSPAWN (1U<<31)
195#define RFFLAGS (RFFDG | RFPROC | RFMEM | RFNOWAIT | RFCFDG | \
196 RFTHREAD | RFSIGSHARE | RFLINUXTHPN | RFSTOPPED | RFHIGHPID | RFTSIGZMB | \
197 RFPROCDESC | RFSPAWN | RFPPWAIT)
198#define RFKERNELONLY (RFSTOPPED | RFHIGHPID | RFPROCDESC)
199
200/* kcmp() options. */
201#define KCMP_FILE 100
202#define KCMP_FILEOBJ 101
203#define KCMP_FILES 102
204#define KCMP_SIGHAND 103
205#define KCMP_VM 104
206
207#define SWAPOFF_FORCE 0x00000001
208
209/*
210 * close_range() options.
211 */
212#define CLOSE_RANGE_CLOEXEC (1<<2)
213
214#endif /* __BSD_VISIBLE */
215
216#endif /* !_SYS_UNISTD_H_ */