xref: /openbsd/include/unistd.h (revision 9b7c3dbb)
1 /*	$OpenBSD: unistd.h,v 1.101 2016/05/23 00:12:58 guenther Exp $ */
2 /*	$NetBSD: unistd.h,v 1.26.4.1 1996/05/28 02:31:51 mrg Exp $	*/
3 
4 /*-
5  * Copyright (c) 1991 The Regents of the University of California.
6  * All rights reserved.
7  *
8  * Redistribution and use in source and binary forms, with or without
9  * modification, are permitted provided that the following conditions
10  * are met:
11  * 1. Redistributions of source code must retain the above copyright
12  *    notice, this list of conditions and the following disclaimer.
13  * 2. Redistributions in binary form must reproduce the above copyright
14  *    notice, this list of conditions and the following disclaimer in the
15  *    documentation and/or other materials provided with the distribution.
16  * 3. Neither the name of the University nor the names of its contributors
17  *    may be used to endorse or promote products derived from this software
18  *    without specific prior written permission.
19  *
20  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30  * SUCH DAMAGE.
31  *
32  *	@(#)unistd.h	5.13 (Berkeley) 6/17/91
33  */
34 
35 #ifndef _UNISTD_H_
36 #define	_UNISTD_H_
37 
38 #include <sys/types.h>
39 #include <sys/unistd.h>
40 
41 #define	STDIN_FILENO	0	/* standard input file descriptor */
42 #define	STDOUT_FILENO	1	/* standard output file descriptor */
43 #define	STDERR_FILENO	2	/* standard error file descriptor */
44 
45 #if __XPG_VISIBLE || __POSIX_VISIBLE >= 200112
46 #define F_ULOCK         0	/* unlock locked section */
47 #define F_LOCK          1	/* lock a section for exclusive use */
48 #define F_TLOCK         2	/* test and lock a section for exclusive use */
49 #define F_TEST          3	/* test a section for locks by other procs */
50 #endif
51 
52 /*
53  * POSIX options and option groups we unconditionally do or don't
54  * implement.  Please keep this list in alphabetical order.
55  *
56  * Anything which is defined as zero below **must** have an
57  * implementation for the corresponding sysconf() which is able to
58  * determine conclusively whether or not the feature is supported.
59  * Anything which is defined as other than -1 below **must** have
60  * complete headers, types, and function declarations as specified by
61  * the POSIX standard; however, if the relevant sysconf() function
62  * returns -1, the functions may be stubbed out.
63  */
64 #define _POSIX_ADVISORY_INFO			(-1)
65 #define _POSIX_ASYNCHRONOUS_IO			(-1)
66 #define _POSIX_BARRIERS				200112L
67 #define _POSIX_CHOWN_RESTRICTED			1
68 #define _POSIX_CLOCK_SELECTION			(-1)
69 #define _POSIX_CPUTIME				200809L
70 #define _POSIX_FSYNC				200112L
71 #define _POSIX_IPV6				0
72 #define _POSIX_JOB_CONTROL			1
73 #define _POSIX_MAPPED_FILES			200112L
74 #define _POSIX_MEMLOCK				200112L
75 #define _POSIX_MEMLOCK_RANGE			200112L
76 #define _POSIX_MEMORY_PROTECTION		200112L
77 #define _POSIX_MESSAGE_PASSING			(-1)
78 #define _POSIX_MONOTONIC_CLOCK			200112L
79 #define _POSIX_NO_TRUNC				1
80 #define _POSIX_PRIORITIZED_IO			(-1)
81 #define _POSIX_PRIORITY_SCHEDULING		(-1)
82 #define _POSIX_RAW_SOCKETS			200112L
83 #define _POSIX_READER_WRITER_LOCKS		200112L
84 #define _POSIX_REALTIME_SIGNALS			(-1)
85 #define _POSIX_REGEXP				1
86 #define _POSIX_SAVED_IDS			1
87 #define _POSIX_SEMAPHORES			200112L
88 #define _POSIX_SHARED_MEMORY_OBJECTS		200809L
89 #define _POSIX_SHELL				1
90 #define _POSIX_SPAWN				200112L
91 #define _POSIX_SPIN_LOCKS			200112L
92 #define _POSIX_SPORADIC_SERVER			(-1)
93 #define _POSIX_SYNCHRONIZED_IO			(-1)
94 #define _POSIX_THREAD_ATTR_STACKADDR		200112L
95 #define _POSIX_THREAD_ATTR_STACKSIZE		200112L
96 #define _POSIX_THREAD_CPUTIME			200809L
97 #define _POSIX_THREAD_PRIO_INHERIT		(-1)
98 #define _POSIX_THREAD_PRIO_PROTECT		(-1)
99 #define _POSIX_THREAD_PRIORITY_SCHEDULING	(-1)
100 #define _POSIX_THREAD_PROCESS_SHARED		(-1)
101 #define _POSIX_THREAD_ROBUST_PRIO_INHERIT	(-1)
102 #define _POSIX_THREAD_ROBUST_PRIO_PROTECT	(-1)
103 #define _POSIX_THREAD_SAFE_FUNCTIONS		200112L
104 #define _POSIX_THREAD_SPORADIC_SERVER		(-1)
105 #define _POSIX_THREADS				200112L
106 #define _POSIX_TIMEOUTS				200112L
107 #define _POSIX_TIMERS				(-1)
108 #define _POSIX_TRACE				(-1)
109 #define _POSIX_TRACE_EVENT_FILTER		(-1)
110 #define _POSIX_TRACE_INHERIT			(-1)
111 #define _POSIX_TRACE_LOG			(-1)
112 #define _POSIX_TYPED_MEMORY_OBJECTS		(-1)
113 #define _POSIX2_C_BIND				200112L
114 #define _POSIX2_C_DEV				(-1) /* need C99 utility */
115 #define _POSIX2_CHAR_TERM			1
116 #define _POSIX2_FORT_DEV			(-1) /* need fort77 utility */
117 #define _POSIX2_FORT_RUN			(-1) /* need asa utility */
118 #define _POSIX2_LOCALEDEF			(-1)
119 #define _POSIX2_PBS				(-1)
120 #define _POSIX2_PBS_ACCOUNTING			(-1)
121 #define _POSIX2_PBS_CHECKPOINT			(-1)
122 #define _POSIX2_PBS_LOCATE			(-1)
123 #define _POSIX2_PBS_MESSAGE			(-1)
124 #define _POSIX2_PBS_TRACK			(-1)
125 #define _POSIX2_SW_DEV				200112L
126 #define _POSIX2_UPE				200112L
127 #define _POSIX_V6_ILP32_OFF32			(-1)
128 #define _POSIX_V6_ILP32_OFFBIG			0
129 #define _POSIX_V6_LP64_OFF64			0
130 #define _POSIX_V6_LPBIG_OFFBIG			0
131 #define _POSIX_V7_ILP32_OFF32			(-1)
132 #define _POSIX_V7_ILP32_OFFBIG			0
133 #define _POSIX_V7_LP64_OFF64			0
134 #define _POSIX_V7_LPBIG_OFFBIG			0
135 
136 #define _XOPEN_CRYPT				1
137 #define _XOPEN_ENH_I18N				(-1) /* mandatory in XSI */
138 #define _XOPEN_LEGACY				(-1)
139 #define _XOPEN_REALTIME				(-1)
140 #define _XOPEN_REALTIME_THREADS			(-1)
141 #define _XOPEN_SHM				1
142 #define _XOPEN_STREAMS				(-1)
143 #define _XOPEN_UUCP				(-1)
144 #define _XOPEN_UNIX				(-1)
145 
146 /* Define the POSIX.2 version we target for compliance. */
147 #define _POSIX2_VERSION				200809L
148 
149 /* the sysconf(3) variable values are part of the ABI */
150 
151 /* configurable system variables */
152 #define	_SC_ARG_MAX		 1
153 #define	_SC_CHILD_MAX		 2
154 #define	_SC_CLK_TCK		 3
155 #define	_SC_NGROUPS_MAX		 4
156 #define	_SC_OPEN_MAX		 5
157 #define	_SC_JOB_CONTROL		 6
158 #define	_SC_SAVED_IDS		 7
159 #define	_SC_VERSION		 8
160 #define	_SC_BC_BASE_MAX		 9
161 #define	_SC_BC_DIM_MAX		10
162 #define	_SC_BC_SCALE_MAX	11
163 #define	_SC_BC_STRING_MAX	12
164 #define	_SC_COLL_WEIGHTS_MAX	13
165 #define	_SC_EXPR_NEST_MAX	14
166 #define	_SC_LINE_MAX		15
167 #define	_SC_RE_DUP_MAX		16
168 #define	_SC_2_VERSION		17
169 #define	_SC_2_C_BIND		18
170 #define	_SC_2_C_DEV		19
171 #define	_SC_2_CHAR_TERM		20
172 #define	_SC_2_FORT_DEV		21
173 #define	_SC_2_FORT_RUN		22
174 #define	_SC_2_LOCALEDEF		23
175 #define	_SC_2_SW_DEV		24
176 #define	_SC_2_UPE		25
177 #define	_SC_STREAM_MAX		26
178 #define	_SC_TZNAME_MAX		27
179 #define	_SC_PAGESIZE		28
180 #define	_SC_PAGE_SIZE		_SC_PAGESIZE	/* 1170 compatibility */
181 #define	_SC_FSYNC		29
182 #define	_SC_XOPEN_SHM		30
183 #define	_SC_SEM_NSEMS_MAX	31
184 #define	_SC_SEM_VALUE_MAX	32
185 #define	_SC_HOST_NAME_MAX	33
186 #define	_SC_MONOTONIC_CLOCK	34
187 #define	_SC_2_PBS		35
188 #define	_SC_2_PBS_ACCOUNTING	36
189 #define	_SC_2_PBS_CHECKPOINT	37
190 #define	_SC_2_PBS_LOCATE	38
191 #define	_SC_2_PBS_MESSAGE	39
192 #define	_SC_2_PBS_TRACK		40
193 #define	_SC_ADVISORY_INFO	41
194 #define	_SC_AIO_LISTIO_MAX	42
195 #define	_SC_AIO_MAX		43
196 #define	_SC_AIO_PRIO_DELTA_MAX	44
197 #define	_SC_ASYNCHRONOUS_IO	45
198 #define	_SC_ATEXIT_MAX		46
199 #define	_SC_BARRIERS		47
200 #define	_SC_CLOCK_SELECTION	48
201 #define	_SC_CPUTIME		49
202 #define	_SC_DELAYTIMER_MAX	50
203 #define	_SC_IOV_MAX		51
204 #define	_SC_IPV6		52
205 #define	_SC_MAPPED_FILES	53
206 #define	_SC_MEMLOCK		54
207 #define	_SC_MEMLOCK_RANGE	55
208 #define	_SC_MEMORY_PROTECTION	56
209 #define	_SC_MESSAGE_PASSING	57
210 #define	_SC_MQ_OPEN_MAX		58
211 #define	_SC_MQ_PRIO_MAX		59
212 #define	_SC_PRIORITIZED_IO	60
213 #define	_SC_PRIORITY_SCHEDULING	61
214 #define	_SC_RAW_SOCKETS		62
215 #define	_SC_READER_WRITER_LOCKS	63
216 #define	_SC_REALTIME_SIGNALS	64
217 #define	_SC_REGEXP		65
218 #define	_SC_RTSIG_MAX		66
219 #define	_SC_SEMAPHORES		67
220 #define	_SC_SHARED_MEMORY_OBJECTS 68
221 #define	_SC_SHELL		69
222 #define	_SC_SIGQUEUE_MAX	70
223 #define	_SC_SPAWN		71
224 #define	_SC_SPIN_LOCKS		72
225 #define	_SC_SPORADIC_SERVER	73
226 #define	_SC_SS_REPL_MAX		74
227 #define	_SC_SYNCHRONIZED_IO	75
228 #define	_SC_SYMLOOP_MAX		76
229 #define	_SC_THREAD_ATTR_STACKADDR 77
230 #define	_SC_THREAD_ATTR_STACKSIZE 78
231 #define	_SC_THREAD_CPUTIME	79
232 #define	_SC_THREAD_DESTRUCTOR_ITERATIONS 80
233 #define	_SC_THREAD_KEYS_MAX	81
234 #define	_SC_THREAD_PRIO_INHERIT	82
235 #define	_SC_THREAD_PRIO_PROTECT	83
236 #define	_SC_THREAD_PRIORITY_SCHEDULING 84
237 #define	_SC_THREAD_PROCESS_SHARED 85
238 #define	_SC_THREAD_ROBUST_PRIO_INHERIT 86
239 #define	_SC_THREAD_ROBUST_PRIO_PROTECT 87
240 #define	_SC_THREAD_SPORADIC_SERVER 88
241 #define	_SC_THREAD_STACK_MIN	89
242 #define	_SC_THREAD_THREADS_MAX	90
243 #define	_SC_THREADS		91
244 #define	_SC_TIMEOUTS		92
245 #define	_SC_TIMER_MAX		93
246 #define	_SC_TIMERS		94
247 #define	_SC_TRACE		95
248 #define	_SC_TRACE_EVENT_FILTER	96
249 #define	_SC_TRACE_EVENT_NAME_MAX 97
250 #define	_SC_TRACE_INHERIT	98
251 #define	_SC_TRACE_LOG		99
252 #define	_SC_GETGR_R_SIZE_MAX	100
253 #define	_SC_GETPW_R_SIZE_MAX	101
254 #define	_SC_LOGIN_NAME_MAX	102
255 #define	_SC_THREAD_SAFE_FUNCTIONS 103
256 #define	_SC_TRACE_NAME_MAX      104
257 #define	_SC_TRACE_SYS_MAX       105
258 #define	_SC_TRACE_USER_EVENT_MAX 106
259 #define	_SC_TTY_NAME_MAX	107
260 #define	_SC_TYPED_MEMORY_OBJECTS 108
261 #define	_SC_V6_ILP32_OFF32	109
262 #define	_SC_V6_ILP32_OFFBIG	110
263 #define	_SC_V6_LP64_OFF64	111
264 #define	_SC_V6_LPBIG_OFFBIG	112
265 #define	_SC_V7_ILP32_OFF32	113
266 #define	_SC_V7_ILP32_OFFBIG	114
267 #define	_SC_V7_LP64_OFF64	115
268 #define	_SC_V7_LPBIG_OFFBIG	116
269 #define	_SC_XOPEN_CRYPT		117
270 #define	_SC_XOPEN_ENH_I18N	118
271 #define	_SC_XOPEN_LEGACY	119
272 #define	_SC_XOPEN_REALTIME	120
273 #define	_SC_XOPEN_REALTIME_THREADS 121
274 #define	_SC_XOPEN_STREAMS	122
275 #define	_SC_XOPEN_UNIX		123
276 #define	_SC_XOPEN_UUCP		124
277 #define	_SC_XOPEN_VERSION	125
278 
279 #define	_SC_PHYS_PAGES		500
280 #define	_SC_AVPHYS_PAGES	501
281 #define	_SC_NPROCESSORS_CONF	502
282 #define	_SC_NPROCESSORS_ONLN	503
283 
284 /* configurable system strings */
285 #define	_CS_PATH				 1
286 #define	_CS_POSIX_V6_ILP32_OFF32_CFLAGS		 2
287 #define	_CS_POSIX_V6_ILP32_OFF32_LDFLAGS	 3
288 #define	_CS_POSIX_V6_ILP32_OFF32_LIBS		 4
289 #define	_CS_POSIX_V6_ILP32_OFFBIG_CFLAGS	 5
290 #define	_CS_POSIX_V6_ILP32_OFFBIG_LDFLAGS	 6
291 #define	_CS_POSIX_V6_ILP32_OFFBIG_LIBS		 7
292 #define	_CS_POSIX_V6_LP64_OFF64_CFLAGS		 8
293 #define	_CS_POSIX_V6_LP64_OFF64_LDFLAGS		 9
294 #define	_CS_POSIX_V6_LP64_OFF64_LIBS		10
295 #define	_CS_POSIX_V6_LPBIG_OFFBIG_CFLAGS	11
296 #define	_CS_POSIX_V6_LPBIG_OFFBIG_LDFLAGS	12
297 #define	_CS_POSIX_V6_LPBIG_OFFBIG_LIBS		13
298 #define	_CS_POSIX_V6_WIDTH_RESTRICTED_ENVS	14
299 #define	_CS_V6_ENV				15
300 #define	_CS_POSIX_V7_ILP32_OFF32_CFLAGS		16
301 #define	_CS_POSIX_V7_ILP32_OFF32_LDFLAGS	17
302 #define	_CS_POSIX_V7_ILP32_OFF32_LIBS		18
303 #define	_CS_POSIX_V7_ILP32_OFFBIG_CFLAGS	19
304 #define	_CS_POSIX_V7_ILP32_OFFBIG_LDFLAGS	20
305 #define	_CS_POSIX_V7_ILP32_OFFBIG_LIBS		21
306 #define	_CS_POSIX_V7_LP64_OFF64_CFLAGS		22
307 #define	_CS_POSIX_V7_LP64_OFF64_LDFLAGS		23
308 #define	_CS_POSIX_V7_LP64_OFF64_LIBS		24
309 #define	_CS_POSIX_V7_LPBIG_OFFBIG_CFLAGS	25
310 #define	_CS_POSIX_V7_LPBIG_OFFBIG_LDFLAGS	26
311 #define	_CS_POSIX_V7_LPBIG_OFFBIG_LIBS		27
312 #define	_CS_POSIX_V7_THREADS_CFLAGS		28
313 #define	_CS_POSIX_V7_THREADS_LDFLAGS		29
314 #define	_CS_POSIX_V7_WIDTH_RESTRICTED_ENVS	30
315 #define	_CS_V7_ENV				31
316 
317 
318 #ifndef NULL
319 #ifdef 	__GNUG__
320 #define	NULL	__null
321 #elif defined(__cplusplus)
322 #define	NULL	0L
323 #else
324 #define	NULL	((void *)0)
325 #endif
326 #endif
327 
328 #ifndef	_INTPTR_T_DEFINED_
329 #define	_INTPTR_T_DEFINED_
330 typedef	__intptr_t		intptr_t;
331 #endif
332 
333 __BEGIN_DECLS
334 __dead void	 _exit(int);
335 int	 access(const char *, int);
336 unsigned int alarm(unsigned int);
337 int	 chdir(const char *);
338 int	 chown(const char *, uid_t, gid_t);
339 int	 close(int);
340 int	 dup(int);
341 int	 dup2(int, int);
342 int	 execl(const char *, const char *, ...)
343 	    __attribute__((__sentinel__));
344 int	 execle(const char *, const char *, ...);
345 int	 execlp(const char *, const char *, ...)
346 	    __attribute__((__sentinel__));
347 int	 execv(const char *, char *const *);
348 int	 execve(const char *, char *const *, char *const *);
349 int	 execvp(const char *, char *const *);
350 #if __BSD_VISIBLE
351 int	 execvpe(const char *, char *const *, char *const *);
352 #endif
353 pid_t	 fork(void);
354 long	 fpathconf(int, int);
355 char	*getcwd(char *, size_t)
356 		__attribute__((__bounded__(__string__,1,2)));
357 gid_t	 getegid(void);
358 uid_t	 geteuid(void);
359 gid_t	 getgid(void);
360 int	 getgroups(int, gid_t *);
361 char	*getlogin(void);
362 pid_t	 getpgrp(void);
363 pid_t	 getpid(void);
364 pid_t	 getppid(void);
365 uid_t	 getuid(void);
366 int	 isatty(int);
367 int	 link(const char *, const char *);
368 off_t	 lseek(int, off_t, int);
369 long	 pathconf(const char *, int);
370 int	 pause(void);
371 int	 pipe(int *);
372 ssize_t	 read(int, void *, size_t)
373 		__attribute__((__bounded__(__buffer__,2,3)));
374 int	 rmdir(const char *);
375 int	 setgid(gid_t);
376 int	 setuid(uid_t);
377 unsigned int sleep(unsigned int);
378 long	 sysconf(int);
379 pid_t	 tcgetpgrp(int);
380 int	 tcsetpgrp(int, pid_t);
381 char	*ttyname(int);
382 int	 unlink(const char *);
383 ssize_t	 write(int, const void *, size_t)
384 		__attribute__((__bounded__(__buffer__,2,3)));
385 
386 #if __POSIX_VISIBLE || __XPG_VISIBLE >= 300
387 pid_t	 setsid(void);
388 int	 setpgid(pid_t, pid_t);
389 #endif
390 
391 #if __POSIX_VISIBLE >= 199209 || __XPG_VISIBLE
392 size_t	 confstr(int, char *, size_t)
393 		__attribute__((__bounded__(__string__,2,3)));
394 #ifndef _GETOPT_DEFINED_
395 #define _GETOPT_DEFINED_
396 int	 getopt(int, char * const *, const char *);
397 extern	 char *optarg;			/* getopt(3) external variables */
398 extern	 int opterr, optind, optopt, optreset;
399 #endif /* _GETOPT_DEFINED_ */
400 #endif
401 
402 #if __POSIX_VISIBLE >= 199506 || __XPG_VISIBLE
403 int	 fsync(int);
404 int	 ftruncate(int, off_t);
405 int	 getlogin_r(char *, size_t)
406 		__attribute__((__bounded__(__string__,1,2)));
407 ssize_t	 readlink(const char * __restrict, char * __restrict, size_t)
408 		__attribute__ ((__bounded__(__string__,2,3)));
409 #endif
410 #if __POSIX_VISIBLE >= 199506
411 int	 fdatasync(int);
412 #endif
413 
414 #if __XPG_VISIBLE || __BSD_VISIBLE
415 char	*crypt(const char *, const char *);
416 int	 fchdir(int);
417 int	 fchown(int, uid_t, gid_t);
418 long	 gethostid(void);
419 char	*getwd(char *)
420 		__attribute__ ((__bounded__(__minbytes__,1,1024)));
421 int	 lchown(const char *, uid_t, gid_t);
422 int	 mkstemp(char *);
423 char	*mktemp(char *);
424 int	 nice(int);
425 int	 setregid(gid_t, gid_t);
426 int	 setreuid(uid_t, uid_t);
427 void	 swab(const void *__restrict, void *__restrict, ssize_t);
428 void	 sync(void);
429 int	 truncate(const char *, off_t);
430 useconds_t	 ualarm(useconds_t, useconds_t);
431 int	 usleep(useconds_t);
432 pid_t	 vfork(void);
433 #endif
434 
435 #if __POSIX_VISIBLE >= 200809 || __XPG_VISIBLE >= 420
436 pid_t	 getpgid(pid_t);
437 pid_t	 getsid(pid_t);
438 #endif
439 
440 #if __XPG_VISIBLE >= 500
441 ssize_t  pread(int, void *, size_t, off_t)
442 		__attribute__((__bounded__(__buffer__,2,3)));
443 ssize_t  pwrite(int, const void *, size_t, off_t)
444 		__attribute__((__bounded__(__buffer__,2,3)));
445 int	 ttyname_r(int, char *, size_t)
446 	    __attribute__((__bounded__(__string__,2,3)));
447 #endif
448 
449 #if __BSD_VISIBLE ||  __XPG_VISIBLE <= 500
450 /* Interfaces withdrawn by X/Open Issue 5 Version 0 */
451 int	 brk(void *);
452 int	 chroot(const char *);
453 int	 getdtablesize(void);
454 int	 getpagesize(void);
455 char	*getpass(const char *);
456 void	*sbrk(int);
457 #endif
458 
459 #if __POSIX_VISIBLE >= 200112 || __XPG_VISIBLE >= 420
460 int     lockf(int, int, off_t);
461 #endif
462 
463 #if __POSIX_VISIBLE >= 200112 || __XPG_VISIBLE >= 420 || __BSD_VISIBLE
464 int	 symlink(const char *, const char *);
465 int	 gethostname(char *, size_t)
466 		__attribute__ ((__bounded__(__string__,1,2)));
467 int	 setegid(gid_t);
468 int	 seteuid(uid_t);
469 #endif
470 
471 #if __POSIX_VISIBLE >= 200809
472 int	faccessat(int, const char *, int, int);
473 int	fchownat(int, const char *, uid_t, gid_t, int);
474 int	linkat(int, const char *, int, const char *, int);
475 ssize_t	readlinkat(int, const char *, char *, size_t)
476 		__attribute__ ((__bounded__(__string__,3,4)));
477 int	symlinkat(const char *, int, const char *);
478 int	unlinkat(int, const char *, int);
479 #endif
480 
481 #if __BSD_VISIBLE
482 int	dup3(int, int, int);
483 int	pipe2(int [2], int);
484 #endif
485 
486 #if __BSD_VISIBLE
487 int	 acct(const char *);
488 int	 closefrom(int);
489 int	 crypt_checkpass(const char *, const char *);
490 int	 crypt_newhash(const char *, const char *, char *, size_t);
491 void	 endusershell(void);
492 char	*fflagstostr(u_int32_t);
493 int	 getdomainname(char *, size_t)
494 		__attribute__ ((__bounded__(__string__,1,2)));
495 int	 getdtablecount(void);
496 int	 getgrouplist(const char *, gid_t, gid_t *, int *);
497 mode_t	 getmode(const void *, mode_t);
498 int	 getresgid(gid_t *, gid_t *, gid_t *);
499 int	 getresuid(uid_t *, uid_t *, uid_t *);
500 pid_t	 getthrid(void);
501 char	*getusershell(void);
502 int	 initgroups(const char *, gid_t);
503 int	 issetugid(void);
504 char	*mkdtemp(char *);
505 int	 mkstemps(char *, int);
506 int	 nfssvc(int, void *);
507 int	 profil(char *, size_t, unsigned long, unsigned int)
508 		__attribute__ ((__bounded__(__string__,1,2)));
509 int	 quotactl(const char *, int, int, char *);
510 int	 rcmd(char **, int, const char *,
511 	    const char *, const char *, int *);
512 int	 rcmd_af(char **, int, const char *,
513 	    const char *, const char *, int *, int);
514 int	 rcmdsh(char **, int, const char *,
515 	    const char *, const char *, char *);
516 int	 reboot(int);
517 int	 revoke(const char *);
518 int	 rresvport(int *);
519 int	 rresvport_af(int *, int);
520 int	 ruserok(const char *, int, const char *, const char *);
521 #ifndef _SELECT_DEFINED_
522 #define _SELECT_DEFINED_
523 struct timeval;
524 int	 select(int, fd_set *, fd_set *, fd_set *, struct timeval *);
525 #endif
526 int	 setdomainname(const char *, size_t);
527 int	 setgroups(int, const gid_t *);
528 int	 sethostid(long);
529 int	 sethostname(const char *, size_t);
530 int	 setlogin(const char *);
531 void	*setmode(const char *);
532 int	 setpgrp(pid_t _pid, pid_t _pgrp);	/* BSD compat version */
533 int	 setresgid(gid_t, gid_t, gid_t);
534 int	 setresuid(uid_t, uid_t, uid_t);
535 void	 setusershell(void);
536 int	 strtofflags(char **, u_int32_t *, u_int32_t *);
537 int	 swapctl(int cmd, const void *arg, int misc);
538 int	 syscall(int, ...);
539 int	 getentropy(void *, size_t);
540 int	 pledge(const char *, const char **paths);
541 pid_t	 __tfork_thread(const struct __tfork *, size_t, void (*)(void *),
542 	    void *);
543 #endif /* __BSD_VISIBLE */
544 __END_DECLS
545 
546 #endif /* !_UNISTD_H_ */
547