2 * SPDX-License-Identifier: BSD-3-Clause
4 * Copyright (c) 1989, 1993
5 * The Regents of the University of California. All rights reserved.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
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.
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
31 * @(#)unistd.h 8.2 (Berkeley) 1/7/94
35 #ifndef _SYS_UNISTD_H_
36 #define _SYS_UNISTD_H_
38 #include <sys/cdefs.h>
41 * POSIX options and option groups we unconditionally do or don't
42 * implement. Those options which are implemented (or not) entirely
43 * in user mode are defined in <unistd.h>. Please keep this list in
46 * Anything which is defined as zero below **must** have an
47 * implementation for the corresponding sysconf() which is able to
48 * determine conclusively whether or not the feature is supported.
49 * Anything which is defined as other than -1 below **must** have
50 * complete headers, types, and function declarations as specified by
51 * the POSIX standard; however, if the relevant sysconf() function
52 * returns -1, the functions may be stubbed out.
54 #define _POSIX_ADVISORY_INFO 200112L
55 #define _POSIX_ASYNCHRONOUS_IO 200112L
56 #define _POSIX_CHOWN_RESTRICTED 1
57 #define _POSIX_CLOCK_SELECTION (-1)
58 #define _POSIX_CPUTIME 200112L
59 #define _POSIX_FSYNC 200112L
61 #define _POSIX_JOB_CONTROL 1
62 #define _POSIX_MAPPED_FILES 200112L
63 #define _POSIX_MEMLOCK (-1)
64 #define _POSIX_MEMLOCK_RANGE 200112L
65 #define _POSIX_MEMORY_PROTECTION 200112L
66 #define _POSIX_MESSAGE_PASSING 200112L
67 #define _POSIX_MONOTONIC_CLOCK 200112L
68 #define _POSIX_NO_TRUNC 1
69 #define _POSIX_PRIORITIZED_IO (-1)
70 #define _POSIX_PRIORITY_SCHEDULING 0
71 #define _POSIX_RAW_SOCKETS 200112L
72 #define _POSIX_REALTIME_SIGNALS 200112L
73 #define _POSIX_SEMAPHORES 200112L
74 #define _POSIX_SHARED_MEMORY_OBJECTS 200112L
75 #define _POSIX_SPORADIC_SERVER (-1)
76 #define _POSIX_SYNCHRONIZED_IO (-1)
77 #define _POSIX_TIMEOUTS 200112L
78 #define _POSIX_TIMERS 200112L
79 #define _POSIX_TYPED_MEMORY_OBJECTS (-1)
80 #define _POSIX_VDISABLE 0xff
84 #define _XOPEN_STREAMS (-1)
88 * Although we have saved user/group IDs, we do not use them in setuid
89 * as described in POSIX 1003.1, because the feature does not work for
90 * root. We use the saved IDs in seteuid/setegid, which are not currently
91 * part of the POSIX 1003.1 specification. XXX revisit for 1003.1-2001
92 * as this is now mandatory.
95 #define _POSIX_SAVED_IDS 1 /* saved set-user-ID and set-group-ID */
98 /* Define the POSIX.1 version we target for compliance. */
99 #define _POSIX_VERSION 200112L
101 /* access function */
102 #define F_OK 0 /* test for existence of file */
103 #define X_OK 0x01 /* test for execute or search permission */
104 #define W_OK 0x02 /* test for write permission */
105 #define R_OK 0x04 /* test for read permission */
107 /* whence values for lseek(2) */
109 #define SEEK_SET 0 /* set file offset to offset */
110 #define SEEK_CUR 1 /* set file offset to current plus offset */
111 #define SEEK_END 2 /* set file offset to EOF plus offset */
114 #define SEEK_DATA 3 /* set file offset to next data past offset */
115 #define SEEK_HOLE 4 /* set file offset to next hole past offset */
118 #ifndef _POSIX_SOURCE
119 /* whence values for lseek(2); renamed by POSIX 1003.1 */
120 #define L_SET SEEK_SET
121 #define L_INCR SEEK_CUR
122 #define L_XTND SEEK_END
125 /* configurable pathname variables */
126 #define _PC_LINK_MAX 1
127 #define _PC_MAX_CANON 2
128 #define _PC_MAX_INPUT 3
129 #define _PC_NAME_MAX 4
130 #define _PC_PATH_MAX 5
131 #define _PC_PIPE_BUF 6
132 #define _PC_CHOWN_RESTRICTED 7
133 #define _PC_NO_TRUNC 8
134 #define _PC_VDISABLE 9
136 #if __POSIX_VISIBLE >= 199309
137 #define _PC_ASYNC_IO 53
138 #define _PC_PRIO_IO 54
139 #define _PC_SYNC_IO 55
142 #if __POSIX_VISIBLE >= 200112
143 #define _PC_ALLOC_SIZE_MIN 10
144 #define _PC_FILESIZEBITS 12
145 #define _PC_REC_INCR_XFER_SIZE 14
146 #define _PC_REC_MAX_XFER_SIZE 15
147 #define _PC_REC_MIN_XFER_SIZE 16
148 #define _PC_REC_XFER_ALIGN 17
149 #define _PC_SYMLINK_MAX 18
153 #define _PC_ACL_EXTENDED 59
154 #define _PC_ACL_PATH_MAX 60
155 #define _PC_CAP_PRESENT 61
156 #define _PC_INF_PRESENT 62
157 #define _PC_MAC_PRESENT 63
158 #define _PC_ACL_NFS4 64
161 /* From OpenSolaris, used by SEEK_DATA/SEEK_HOLE. */
162 #define _PC_MIN_HOLE_SIZE 21
168 * XXX currently, some operations without RFPROC set are not supported.
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)
200 #endif /* __BSD_VISIBLE */
202 #endif /* !_SYS_UNISTD_H_ */