xref: /minix/sys/sys/unistd.h (revision 0a6a1f1d)
1 /*	$NetBSD: unistd.h,v 1.55 2013/12/19 19:11:50 rmind 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 #if !defined(__minix)
66 /*
67  * We support the posix_spawn() family of functions (unconditionally).
68  */
69 #define	_POSIX_SPAWN			200809L
70 #endif /* !defined(__minix) */
71 
72 /* execution-time symbolic constants */
73 
74 /*
75  * POSIX options and option groups we unconditionally do or don't
76  * implement.  Those options which are implemented (or not) entirely
77  * in user mode are defined in <unistd.h>.  Please keep this list in
78  * alphabetical order.
79  *
80  * Anything which is defined as zero below **must** have an
81  * implementation for the corresponding sysconf() which is able to
82  * determine conclusively whether or not the feature is supported.
83  * Anything which is defined as other than -1 below **must** have
84  * complete headers, types, and function declarations as specified by
85  * the POSIX standard; however, if the relevant sysconf() function
86  * returns -1, the functions may be stubbed out.
87  */
88 					/* Advisory information */
89 #undef	_POSIX_ADVISORY_INFO
90 					/* asynchronous I/O is available */
91 #define	_POSIX_ASYNCHRONOUS_IO		200112L
92 					/* barriers */
93 #define	_POSIX_BARRIERS			200112L
94 					/* chown requires correct privileges */
95 #define	_POSIX_CHOWN_RESTRICTED		1
96 					/* clock selection */
97 #define	_POSIX_CLOCK_SELECTION		-1
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 					/* _r functions */
151 #define	_POSIX_THREAD_SAFE_FUNCTIONS	200112L
152 					/* timeouts */
153 #undef	_POSIX_TIMEOUTS
154 					/* timers */
155 #define	_POSIX_TIMERS			200112L
156 					/* typed memory objects */
157 #undef	_POSIX_TYPED_MEMORY_OBJECTS
158 					/* may disable terminal spec chars */
159 #define	_POSIX_VDISABLE			__CAST(unsigned char, '\377')
160 
161 					/* C binding */
162 #define	_POSIX2_C_BIND			200112L
163 
164 					/* XPG4.2 shared memory */
165 #define	_XOPEN_SHM			0
166 
167 /* access function */
168 #define	F_OK		0	/* test for existence of file */
169 #define	X_OK		0x01	/* test for execute or search permission */
170 #define	W_OK		0x02	/* test for write permission */
171 #define	R_OK		0x04	/* test for read permission */
172 
173 /* whence values for lseek(2) */
174 #define	SEEK_SET	0	/* set file offset to offset */
175 #define	SEEK_CUR	1	/* set file offset to current plus offset */
176 #define	SEEK_END	2	/* set file offset to EOF plus offset */
177 
178 #if defined(_NETBSD_SOURCE)
179 /* whence values for lseek(2); renamed by POSIX 1003.1 */
180 #define	L_SET		SEEK_SET
181 #define	L_INCR		SEEK_CUR
182 #define	L_XTND		SEEK_END
183 
184 /*
185  * fsync_range values.
186  *
187  * Note the following flag values were chosen to not overlap
188  * values for SEEK_XXX flags.  While not currently implemented,
189  * it is possible to extend this call to respect SEEK_CUR and
190  * SEEK_END offset addressing modes.
191  */
192 #define	FDATASYNC	0x0010	/* sync data and minimal metadata */
193 #define	FFILESYNC	0x0020	/* sync data and metadata */
194 #define	FDISKSYNC	0x0040	/* flush disk caches after sync */
195 #endif
196 
197 /* configurable pathname variables; use as argument to pathconf(3) */
198 #define	_PC_LINK_MAX		 1
199 #define	_PC_MAX_CANON		 2
200 #define	_PC_MAX_INPUT		 3
201 #define	_PC_NAME_MAX		 4
202 #define	_PC_PATH_MAX		 5
203 #define	_PC_PIPE_BUF		 6
204 #define	_PC_CHOWN_RESTRICTED	 7
205 #define	_PC_NO_TRUNC		 8
206 #define	_PC_VDISABLE		 9
207 #define	_PC_SYNC_IO		10
208 #define	_PC_FILESIZEBITS	11
209 #define	_PC_SYMLINK_MAX		12
210 #define	_PC_2_SYMLINKS		13
211 #define	_PC_ACL_EXTENDED	14
212 
213 /* From OpenSolaris, used by SEEK_DATA/SEEK_HOLE. */
214 #define	_PC_MIN_HOLE_SIZE	15
215 
216 /* configurable system variables; use as argument to sysconf(3) */
217 /*
218  * XXX The value of _SC_CLK_TCK is embedded in <time.h>.
219  * XXX The value of _SC_PAGESIZE is embedded in <sys/shm.h>.
220  */
221 #define	_SC_ARG_MAX		 1
222 #define	_SC_CHILD_MAX		 2
223 #define	_O_SC_CLK_TCK		 3 /* Old version, always 100 */
224 #define	_SC_NGROUPS_MAX		 4
225 #define	_SC_OPEN_MAX		 5
226 #define	_SC_JOB_CONTROL		 6
227 #define	_SC_SAVED_IDS		 7
228 #define	_SC_VERSION		 8
229 #define	_SC_BC_BASE_MAX		 9
230 #define	_SC_BC_DIM_MAX		10
231 #define	_SC_BC_SCALE_MAX	11
232 #define	_SC_BC_STRING_MAX	12
233 #define	_SC_COLL_WEIGHTS_MAX	13
234 #define	_SC_EXPR_NEST_MAX	14
235 #define	_SC_LINE_MAX		15
236 #define	_SC_RE_DUP_MAX		16
237 #define	_SC_2_VERSION		17
238 #define	_SC_2_C_BIND		18
239 #define	_SC_2_C_DEV		19
240 #define	_SC_2_CHAR_TERM		20
241 #define	_SC_2_FORT_DEV		21
242 #define	_SC_2_FORT_RUN		22
243 #define	_SC_2_LOCALEDEF		23
244 #define	_SC_2_SW_DEV		24
245 #define	_SC_2_UPE		25
246 #define	_SC_STREAM_MAX		26
247 #define	_SC_TZNAME_MAX		27
248 #define	_SC_PAGESIZE		28
249 #define	_SC_PAGE_SIZE		_SC_PAGESIZE	/* 1170 compatibility */
250 #define	_SC_FSYNC		29
251 #define	_SC_XOPEN_SHM		30
252 #define	_SC_SYNCHRONIZED_IO	31
253 #define	_SC_IOV_MAX		32
254 #define	_SC_MAPPED_FILES	33
255 #define	_SC_MEMLOCK		34
256 #define	_SC_MEMLOCK_RANGE	35
257 #define	_SC_MEMORY_PROTECTION	36
258 #define	_SC_LOGIN_NAME_MAX	37
259 #define	_SC_MONOTONIC_CLOCK	38
260 #define	_SC_CLK_TCK		39 /* New, variable version */
261 #define	_SC_ATEXIT_MAX		40
262 #define	_SC_THREADS		41
263 #define	_SC_SEMAPHORES		42
264 #define	_SC_BARRIERS		43
265 #define	_SC_TIMERS		44
266 #define	_SC_SPIN_LOCKS		45
267 #define	_SC_READER_WRITER_LOCKS	46
268 #define	_SC_GETGR_R_SIZE_MAX	47
269 #define	_SC_GETPW_R_SIZE_MAX	48
270 #define	_SC_CLOCK_SELECTION	49
271 #define	_SC_ASYNCHRONOUS_IO	50
272 #define	_SC_AIO_LISTIO_MAX	51
273 #define	_SC_AIO_MAX		52
274 #define	_SC_MESSAGE_PASSING	53
275 #define	_SC_MQ_OPEN_MAX		54
276 #define	_SC_MQ_PRIO_MAX		55
277 #define	_SC_PRIORITY_SCHEDULING	56
278 #define	_SC_THREAD_DESTRUCTOR_ITERATIONS 57
279 #define	_SC_THREAD_KEYS_MAX		58
280 #define	_SC_THREAD_STACK_MIN		59
281 #define	_SC_THREAD_THREADS_MAX		60
282 #define	_SC_THREAD_ATTR_STACKADDR	61
283 #define	_SC_THREAD_ATTR_STACKSIZE 	62
284 #define	_SC_THREAD_PRIORITY_SCHEDULING	63
285 #define	_SC_THREAD_PRIO_INHERIT 	64
286 #define	_SC_THREAD_PRIO_PROTECT		65
287 #define	_SC_THREAD_PROCESS_SHARED	66
288 #define	_SC_THREAD_SAFE_FUNCTIONS	67
289 #define	_SC_TTY_NAME_MAX		68
290 #define	_SC_HOST_NAME_MAX		69
291 #define	_SC_PASS_MAX			70
292 #define	_SC_REGEXP			71
293 #define	_SC_SHELL			72
294 #define	_SC_SYMLOOP_MAX			73
295 
296 /* Actually, they are not supported or implemented yet */
297 #define	_SC_V6_ILP32_OFF32		74
298 #define	_SC_V6_ILP32_OFFBIG		75
299 #define	_SC_V6_LP64_OFF64		76
300 #define	_SC_V6_LPBIG_OFFBIG		77
301 #define	_SC_2_PBS			80
302 #define	_SC_2_PBS_ACCOUNTING		81
303 #define	_SC_2_PBS_CHECKPOINT		82
304 #define	_SC_2_PBS_LOCATE		83
305 #define	_SC_2_PBS_MESSAGE		84
306 #define	_SC_2_PBS_TRACK			85
307 
308 /* These are implemented */
309 #define	_SC_SPAWN			86
310 #define	_SC_SHARED_MEMORY_OBJECTS	87
311 
312 /* Extensions found in Solaris and Linux. */
313 #define	_SC_PHYS_PAGES		121
314 
315 #ifdef _NETBSD_SOURCE
316 /* Commonly provided sysconf() extensions */
317 #define	_SC_NPROCESSORS_CONF	1001
318 #define	_SC_NPROCESSORS_ONLN	1002
319 /* Native variables */
320 #define	_SC_SCHED_RT_TS		2001
321 #define	_SC_SCHED_PRI_MIN	2002
322 #define	_SC_SCHED_PRI_MAX	2003
323 #endif	/* _NETBSD_SOURCE */
324 
325 /* configurable system strings */
326 #define	_CS_PATH		 1
327 
328 #endif /* !_SYS_UNISTD_H_ */
329