1/* $NetBSD: unistd.h,v 1.65 2023/10/25 08:22:25 simonb Exp $ */
2
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/featuretest.h>
38
39/* compile-time symbolic constants */
40#define _POSIX_JOB_CONTROL 1
41 /* implementation supports job control */
42
43/*
44 * According to POSIX 1003.1:
45 * "The saved set-user-ID capability allows a program to regain the
46 * effective user ID established at the last exec call."
47 * However, the setuid/setgid function as specified by POSIX 1003.1 does
48 * not allow changing the effective ID from the super-user without also
49 * changed the saved ID, so it is impossible to get super-user privileges
50 * back later. Instead we provide this feature independent of the current
51 * effective ID through the seteuid/setegid function. In addition, we do
52 * not use the saved ID as specified by POSIX 1003.1 in setuid/setgid,
53 * because this would make it impossible for a set-user-ID executable
54 * owned by a user other than the super-user to permanently revoke its
55 * extra privileges.
56 */
57#ifdef _NOT_AVAILABLE
58#define _POSIX_SAVED_IDS 1
59 /* saved set-user-ID and set-group-ID */
60#endif
61
62#define _POSIX_VERSION 200112L
63#define _POSIX2_VERSION 200112L
64
65/*
66 * We support the posix_spawn() family of functions (unconditionally).
67 */
68#define _POSIX_SPAWN 200809L
69
70/* execution-time symbolic constants */
71
72/*
73 * POSIX options and option groups we unconditionally do or don't
74 * implement. Those options which are implemented (or not) entirely
75 * in user mode are defined in <unistd.h>. Please keep this list in
76 * alphabetical order.
77 *
78 * Anything which is defined as zero below **must** have an
79 * implementation for the corresponding sysconf() which is able to
80 * determine conclusively whether or not the feature is supported.
81 * Anything which is defined as other than -1 below **must** have
82 * complete headers, types, and function declarations as specified by
83 * the POSIX standard; however, if the relevant sysconf() function
84 * returns -1, the functions may be stubbed out.
85 */
86 /* Advisory information */
87#undef _POSIX_ADVISORY_INFO
88 /* asynchronous I/O is available */
89#define _POSIX_ASYNCHRONOUS_IO 200112L
90 /* barriers */
91#define _POSIX_BARRIERS 200112L
92 /* chown requires correct privileges */
93#define _POSIX_CHOWN_RESTRICTED 1
94 /* clock selection */
95#define _POSIX_CLOCK_SELECTION -1
96 /* cputime clock */
97#define _POSIX_CPUTIME 200112L
98 /* CPU type */
99#undef _POSIX_CPUTYPE
100 /* file synchronization is available */
101#define _POSIX_FSYNC 1
102 /* support IPv6 */
103#define _POSIX_IPV6 0
104 /* job control is available */
105#define _POSIX_JOB_CONTROL 1
106 /* memory mapped files */
107#define _POSIX_MAPPED_FILES 1
108 /* memory locking whole address space */
109#define _POSIX_MEMLOCK 1
110 /* memory locking address ranges */
111#define _POSIX_MEMLOCK_RANGE 1
112 /* memory access protections */
113#define _POSIX_MEMORY_PROTECTION 1
114 /* message passing is available */
115#define _POSIX_MESSAGE_PASSING 200112L
116 /* monotonic clock */
117#define _POSIX_MONOTONIC_CLOCK 200112L
118 /* too-long path comp generate errors */
119#define _POSIX_NO_TRUNC 1
120 /* prioritized I/O */
121#define _POSIX_PRIORITIZED_IO -1
122 /* priority scheduling */
123#define _POSIX_PRIORITY_SCHEDULING 200112L
124 /* raw sockets */
125#define _POSIX_RAW_SOCKETS 200112L
126 /* read/write locks */
127#define _POSIX_READER_WRITER_LOCKS 200112L
128 /* realtime signals */
129#undef _POSIX_REALTIME_SIGNALS
130 /* regular expressions */
131#define _POSIX_REGEXP 1
132 /* semaphores */
133#define _POSIX_SEMAPHORES 0
134 /* shared memory objects */
135#define _POSIX_SHARED_MEMORY_OBJECTS 0
136 /* shell */
137#define _POSIX_SHELL 1
138 /* spin locks */
139#define _POSIX_SPIN_LOCKS 200112L
140 /* sporadic server */
141#undef _POSIX_SPORADIC_SERVER
142 /* synchronized I/O is available */
143#define _POSIX_SYNCHRONIZED_IO 1
144 /* threads */
145#define _POSIX_THREADS 200112L
146 /* pthread_attr for stack size */
147#define _POSIX_THREAD_ATTR_STACKSIZE 200112L
148 /* pthread_attr for stack address */
149#define _POSIX_THREAD_ATTR_STACKADDR 200112L
150 /* thread cputime clock */
151#define _POSIX_THREAD_CPUTIME 200112L
152 /* _r functions */
153#define _POSIX_THREAD_PRIO_PROTECT 200112L
154 /* PTHREAD_PRIO_PROTECT */
155#define _POSIX_THREAD_SAFE_FUNCTIONS 200112L
156 /* timeouts */
157#undef _POSIX_TIMEOUTS
158 /* timers */
159#define _POSIX_TIMERS 200112L
160 /* typed memory objects */
161#undef _POSIX_TYPED_MEMORY_OBJECTS
162 /* may disable terminal spec chars */
163#define _POSIX_VDISABLE __CAST(unsigned char, '\377')
164
165 /* C binding */
166#define _POSIX2_C_BIND 200112L
167
168 /* XPG4.2 shared memory */
169#define _XOPEN_SHM 0
170
171/* access function */
172#define F_OK 0 /* test for existence of file */
173#define X_OK 0x01 /* test for execute or search permission */
174#define W_OK 0x02 /* test for write permission */
175#define R_OK 0x04 /* test for read permission */
176
177/* whence values for lseek(2) */
178#define SEEK_SET 0 /* set file offset to offset */
179#define SEEK_CUR 1 /* set file offset to current plus offset */
180#define SEEK_END 2 /* set file offset to EOF plus offset */
181
182#if defined(_NETBSD_SOURCE)
183/* whence values for lseek(2); renamed by POSIX 1003.1 */
184#define L_SET SEEK_SET
185#define L_INCR SEEK_CUR
186#define L_XTND SEEK_END
187
188/*
189 * fsync_range values.
190 *
191 * Note the following flag values were chosen to not overlap
192 * values for SEEK_XXX flags. While not currently implemented,
193 * it is possible to extend this call to respect SEEK_CUR and
194 * SEEK_END offset addressing modes.
195 */
196#define FDATASYNC 0x0010 /* sync data and minimal metadata */
197#define FFILESYNC 0x0020 /* sync data and metadata */
198#define FDISKSYNC 0x0040 /* flush disk caches after sync */
199#endif
200
201/* configurable pathname variables; use as argument to pathconf(3) */
202#define _PC_LINK_MAX 1
203#define _PC_MAX_CANON 2
204#define _PC_MAX_INPUT 3
205#define _PC_NAME_MAX 4
206#define _PC_PATH_MAX 5
207#define _PC_PIPE_BUF 6
208#define _PC_CHOWN_RESTRICTED 7
209#define _PC_NO_TRUNC 8
210#define _PC_VDISABLE 9
211#define _PC_SYNC_IO 10
212#define _PC_FILESIZEBITS 11
213#define _PC_SYMLINK_MAX 12
214#define _PC_2_SYMLINKS 13
215#define _PC_ACL_EXTENDED 14
216
217/* From OpenSolaris, used by SEEK_DATA/SEEK_HOLE. */
218#define _PC_MIN_HOLE_SIZE 15
219
220#ifdef _NETBSD_SOURCE
221#define _PC_ACL_PATH_MAX 16
222#define _PC_ACL_NFS4 17
223#endif
224
225/* configurable system variables; use as argument to sysconf(3) */
226/*
227 * XXX The value of _SC_CLK_TCK is embedded in <time.h>.
228 * XXX The value of _SC_PAGESIZE is embedded in <sys/shm.h>.
229 */
230#define _SC_ARG_MAX 1
231#define _SC_CHILD_MAX 2
232#define _O_SC_CLK_TCK 3 /* Old version, always 100 */
233#define _SC_NGROUPS_MAX 4
234#define _SC_OPEN_MAX 5
235#define _SC_JOB_CONTROL 6
236#define _SC_SAVED_IDS 7
237#define _SC_VERSION 8
238#define _SC_BC_BASE_MAX 9
239#define _SC_BC_DIM_MAX 10
240#define _SC_BC_SCALE_MAX 11
241#define _SC_BC_STRING_MAX 12
242#define _SC_COLL_WEIGHTS_MAX 13
243#define _SC_EXPR_NEST_MAX 14
244#define _SC_LINE_MAX 15
245#define _SC_RE_DUP_MAX 16
246#define _SC_2_VERSION 17
247#define _SC_2_C_BIND 18
248#define _SC_2_C_DEV 19
249#define _SC_2_CHAR_TERM 20
250#define _SC_2_FORT_DEV 21
251#define _SC_2_FORT_RUN 22
252#define _SC_2_LOCALEDEF 23
253#define _SC_2_SW_DEV 24
254#define _SC_2_UPE 25
255#define _SC_STREAM_MAX 26
256#define _SC_TZNAME_MAX 27
257#define _SC_PAGESIZE 28
258#define _SC_PAGE_SIZE _SC_PAGESIZE /* 1170 compatibility */
259#define _SC_FSYNC 29
260#define _SC_XOPEN_SHM 30
261#define _SC_SYNCHRONIZED_IO 31
262#define _SC_IOV_MAX 32
263#define _SC_MAPPED_FILES 33
264#define _SC_MEMLOCK 34
265#define _SC_MEMLOCK_RANGE 35
266#define _SC_MEMORY_PROTECTION 36
267#define _SC_LOGIN_NAME_MAX 37
268#define _SC_MONOTONIC_CLOCK 38
269#define _SC_CLK_TCK 39 /* New, variable version */
270#define _SC_ATEXIT_MAX 40
271#define _SC_THREADS 41
272#define _SC_SEMAPHORES 42
273#define _SC_BARRIERS 43
274#define _SC_TIMERS 44
275#define _SC_SPIN_LOCKS 45
276#define _SC_READER_WRITER_LOCKS 46
277#define _SC_GETGR_R_SIZE_MAX 47
278#define _SC_GETPW_R_SIZE_MAX 48
279#define _SC_CLOCK_SELECTION 49
280#define _SC_ASYNCHRONOUS_IO 50
281#define _SC_AIO_LISTIO_MAX 51
282#define _SC_AIO_MAX 52
283#define _SC_MESSAGE_PASSING 53
284#define _SC_MQ_OPEN_MAX 54
285#define _SC_MQ_PRIO_MAX 55
286#define _SC_PRIORITY_SCHEDULING 56
287#define _SC_THREAD_DESTRUCTOR_ITERATIONS 57
288#define _SC_THREAD_KEYS_MAX 58
289#define _SC_THREAD_STACK_MIN 59
290#define _SC_THREAD_THREADS_MAX 60
291#define _SC_THREAD_ATTR_STACKADDR 61
292#define _SC_THREAD_ATTR_STACKSIZE 62
293#define _SC_THREAD_PRIORITY_SCHEDULING 63
294#define _SC_THREAD_PRIO_INHERIT 64
295#define _SC_THREAD_PRIO_PROTECT 65
296#define _SC_THREAD_PROCESS_SHARED 66
297#define _SC_THREAD_SAFE_FUNCTIONS 67
298#define _SC_TTY_NAME_MAX 68
299#define _SC_HOST_NAME_MAX 69
300#define _SC_PASS_MAX 70
301#define _SC_REGEXP 71
302#define _SC_SHELL 72
303#define _SC_SYMLOOP_MAX 73
304
305/* Actually, they are not supported or implemented yet */
306#define _SC_V6_ILP32_OFF32 74
307#define _SC_V6_ILP32_OFFBIG 75
308#define _SC_V6_LP64_OFF64 76
309#define _SC_V6_LPBIG_OFFBIG 77
310#define _SC_2_PBS 80
311#define _SC_2_PBS_ACCOUNTING 81
312#define _SC_2_PBS_CHECKPOINT 82
313#define _SC_2_PBS_LOCATE 83
314#define _SC_2_PBS_MESSAGE 84
315#define _SC_2_PBS_TRACK 85
316
317/* These are implemented */
318#define _SC_SPAWN 86
319#define _SC_SHARED_MEMORY_OBJECTS 87
320
321#define _SC_TIMER_MAX 88
322#define _SC_SEM_NSEMS_MAX 89
323#define _SC_CPUTIME 90
324#define _SC_THREAD_CPUTIME 91
325#define _SC_DELAYTIMER_MAX 92
326#define _SC_SIGQUEUE_MAX 93
327#define _SC_REALTIME_SIGNALS 94
328#define _SC_RTSIG_MAX 95
329
330/* Extensions found in Solaris and Linux. */
331#define _SC_PHYS_PAGES 121
332#define _SC_AVPHYS_PAGES 122
333
334#ifdef _NETBSD_SOURCE
335/* Commonly provided sysconf() extensions */
336#define _SC_NPROCESSORS_CONF 1001
337#define _SC_NPROCESSORS_ONLN 1002
338/* Native variables */
339#define _SC_SCHED_RT_TS 2001
340#define _SC_SCHED_PRI_MIN 2002
341#define _SC_SCHED_PRI_MAX 2003
342#endif /* _NETBSD_SOURCE */
343
344/* configurable system strings */
345#define _CS_PATH 1
346
347#endif /* !_SYS_UNISTD_H_ */