xref: /freebsd/include/unistd.h (revision b9f654b163bce26de79705e77b872427c9f2afa1)
1 /*-
2  * SPDX-License-Identifier: BSD-3-Clause
3  *
4  * Copyright (c) 1991, 1993, 1994
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	8.12 (Berkeley) 4/27/95
32  * $FreeBSD$
33  */
34 
35 #ifndef _UNISTD_H_
36 #define	_UNISTD_H_
37 
38 #include <sys/cdefs.h>
39 #include <sys/types.h>			/* XXX adds too much pollution. */
40 #include <sys/unistd.h>
41 #include <sys/_null.h>
42 #include <sys/_types.h>
43 
44 #ifndef _GID_T_DECLARED
45 typedef	__gid_t		gid_t;
46 #define	_GID_T_DECLARED
47 #endif
48 
49 #ifndef _OFF_T_DECLARED
50 typedef	__off_t		off_t;
51 #define	_OFF_T_DECLARED
52 #endif
53 
54 #ifndef _PID_T_DECLARED
55 typedef	__pid_t		pid_t;
56 #define	_PID_T_DECLARED
57 #endif
58 
59 #ifndef _SIZE_T_DECLARED
60 typedef	__size_t	size_t;
61 #define	_SIZE_T_DECLARED
62 #endif
63 
64 #ifndef _SSIZE_T_DECLARED
65 typedef	__ssize_t	ssize_t;
66 #define	_SSIZE_T_DECLARED
67 #endif
68 
69 #ifndef _UID_T_DECLARED
70 typedef	__uid_t		uid_t;
71 #define	_UID_T_DECLARED
72 #endif
73 
74 #ifndef _USECONDS_T_DECLARED
75 typedef	__useconds_t	useconds_t;
76 #define	_USECONDS_T_DECLARED
77 #endif
78 
79 #define	STDIN_FILENO	0	/* standard input file descriptor */
80 #define	STDOUT_FILENO	1	/* standard output file descriptor */
81 #define	STDERR_FILENO	2	/* standard error file descriptor */
82 
83 #if __XSI_VISIBLE || __POSIX_VISIBLE >= 200112
84 #define	F_ULOCK		0	/* unlock locked section */
85 #define	F_LOCK		1	/* lock a section for exclusive use */
86 #define	F_TLOCK		2	/* test and lock a section for exclusive use */
87 #define	F_TEST		3	/* test a section for locks by other procs */
88 #endif
89 
90 /*
91  * POSIX options and option groups we unconditionally do or don't
92  * implement.  This list includes those options which are exclusively
93  * implemented (or not) in user mode.  Please keep this list in
94  * alphabetical order.
95  *
96  * Anything which is defined as zero below **must** have an
97  * implementation for the corresponding sysconf() which is able to
98  * determine conclusively whether or not the feature is supported.
99  * Anything which is defined as other than -1 below **must** have
100  * complete headers, types, and function declarations as specified by
101  * the POSIX standard; however, if the relevant sysconf() function
102  * returns -1, the functions may be stubbed out.
103  */
104 #define	_POSIX_BARRIERS			200112L
105 #define	_POSIX_CPUTIME			200112L
106 #define	_POSIX_READER_WRITER_LOCKS	200112L
107 #define	_POSIX_REGEXP			1
108 #define	_POSIX_SHELL			1
109 #define	_POSIX_SPAWN			200112L
110 #define	_POSIX_SPIN_LOCKS		200112L
111 #define	_POSIX_THREAD_ATTR_STACKADDR	200112L
112 #define	_POSIX_THREAD_ATTR_STACKSIZE	200112L
113 #define	_POSIX_THREAD_CPUTIME		200112L
114 #define	_POSIX_THREAD_PRIO_INHERIT	200112L
115 #define	_POSIX_THREAD_PRIO_PROTECT	200112L
116 #define	_POSIX_THREAD_PRIORITY_SCHEDULING 200112L
117 #define	_POSIX_THREAD_PROCESS_SHARED	200112L
118 #define	_POSIX_THREAD_SAFE_FUNCTIONS	-1
119 #define	_POSIX_THREAD_SPORADIC_SERVER	-1
120 #define	_POSIX_THREADS			200112L
121 #define	_POSIX_TRACE			-1
122 #define	_POSIX_TRACE_EVENT_FILTER	-1
123 #define	_POSIX_TRACE_INHERIT		-1
124 #define	_POSIX_TRACE_LOG		-1
125 #define	_POSIX2_C_BIND			200112L	/* mandatory */
126 #define	_POSIX2_C_DEV			-1 /* need c99 utility */
127 #define	_POSIX2_CHAR_TERM		1
128 #define	_POSIX2_FORT_DEV		-1 /* need fort77 utility */
129 #define	_POSIX2_FORT_RUN		200112L
130 #define	_POSIX2_LOCALEDEF		-1
131 #define	_POSIX2_PBS			-1
132 #define	_POSIX2_PBS_ACCOUNTING		-1
133 #define	_POSIX2_PBS_CHECKPOINT		-1
134 #define	_POSIX2_PBS_LOCATE		-1
135 #define	_POSIX2_PBS_MESSAGE		-1
136 #define	_POSIX2_PBS_TRACK		-1
137 #define	_POSIX2_SW_DEV			-1 /* XXX ??? */
138 #define	_POSIX2_UPE			200112L
139 #define	_V6_ILP32_OFF32			-1
140 #define	_V6_ILP32_OFFBIG		0
141 #define	_V6_LP64_OFF64			0
142 #define	_V6_LPBIG_OFFBIG		-1
143 
144 #if __XSI_VISIBLE
145 #define	_XOPEN_CRYPT			-1 /* XXX ??? */
146 #define	_XOPEN_ENH_I18N			-1 /* mandatory in XSI */
147 #define	_XOPEN_LEGACY			-1
148 #define	_XOPEN_REALTIME			-1
149 #define	_XOPEN_REALTIME_THREADS		-1
150 #define	_XOPEN_UNIX			-1
151 #endif
152 
153 /* Define the POSIX.2 version we target for compliance. */
154 #define	_POSIX2_VERSION		199212L
155 
156 /*
157  * POSIX-style system configuration variable accessors (for the
158  * sysconf function).  The kernel does not directly implement the
159  * sysconf() interface; rather, a C library stub translates references
160  * to sysconf() into calls to sysctl() using a giant switch statement.
161  * Those that are marked `user' are implemented entirely in the C
162  * library and never query the kernel.  pathconf() is implemented
163  * directly by the kernel so those are not defined here.
164  */
165 #define	_SC_ARG_MAX		 1
166 #define	_SC_CHILD_MAX		 2
167 #define	_SC_CLK_TCK		 3
168 #define	_SC_NGROUPS_MAX		 4
169 #define	_SC_OPEN_MAX		 5
170 #define	_SC_JOB_CONTROL		 6
171 #define	_SC_SAVED_IDS		 7
172 #define	_SC_VERSION		 8
173 #define	_SC_BC_BASE_MAX		 9 /* user */
174 #define	_SC_BC_DIM_MAX		10 /* user */
175 #define	_SC_BC_SCALE_MAX	11 /* user */
176 #define	_SC_BC_STRING_MAX	12 /* user */
177 #define	_SC_COLL_WEIGHTS_MAX	13 /* user */
178 #define	_SC_EXPR_NEST_MAX	14 /* user */
179 #define	_SC_LINE_MAX		15 /* user */
180 #define	_SC_RE_DUP_MAX		16 /* user */
181 #define	_SC_2_VERSION		17 /* user */
182 #define	_SC_2_C_BIND		18 /* user */
183 #define	_SC_2_C_DEV		19 /* user */
184 #define	_SC_2_CHAR_TERM		20 /* user */
185 #define	_SC_2_FORT_DEV		21 /* user */
186 #define	_SC_2_FORT_RUN		22 /* user */
187 #define	_SC_2_LOCALEDEF		23 /* user */
188 #define	_SC_2_SW_DEV		24 /* user */
189 #define	_SC_2_UPE		25 /* user */
190 #define	_SC_STREAM_MAX		26 /* user */
191 #define	_SC_TZNAME_MAX		27 /* user */
192 
193 #if __POSIX_VISIBLE >= 199309
194 #define	_SC_ASYNCHRONOUS_IO	28
195 #define	_SC_MAPPED_FILES	29
196 #define	_SC_MEMLOCK		30
197 #define	_SC_MEMLOCK_RANGE	31
198 #define	_SC_MEMORY_PROTECTION	32
199 #define	_SC_MESSAGE_PASSING	33
200 #define	_SC_PRIORITIZED_IO	34
201 #define	_SC_PRIORITY_SCHEDULING	35
202 #define	_SC_REALTIME_SIGNALS	36
203 #define	_SC_SEMAPHORES		37
204 #define	_SC_FSYNC		38
205 #define	_SC_SHARED_MEMORY_OBJECTS 39
206 #define	_SC_SYNCHRONIZED_IO	40
207 #define	_SC_TIMERS		41
208 #define	_SC_AIO_LISTIO_MAX	42
209 #define	_SC_AIO_MAX		43
210 #define	_SC_AIO_PRIO_DELTA_MAX	44
211 #define	_SC_DELAYTIMER_MAX	45
212 #define	_SC_MQ_OPEN_MAX		46
213 #define	_SC_PAGESIZE		47
214 #define	_SC_RTSIG_MAX		48
215 #define	_SC_SEM_NSEMS_MAX	49
216 #define	_SC_SEM_VALUE_MAX	50
217 #define	_SC_SIGQUEUE_MAX	51
218 #define	_SC_TIMER_MAX		52
219 #endif
220 
221 #if __POSIX_VISIBLE >= 200112
222 #define	_SC_2_PBS		59 /* user */
223 #define	_SC_2_PBS_ACCOUNTING	60 /* user */
224 #define	_SC_2_PBS_CHECKPOINT	61 /* user */
225 #define	_SC_2_PBS_LOCATE	62 /* user */
226 #define	_SC_2_PBS_MESSAGE	63 /* user */
227 #define	_SC_2_PBS_TRACK		64 /* user */
228 #define	_SC_ADVISORY_INFO	65
229 #define	_SC_BARRIERS		66 /* user */
230 #define	_SC_CLOCK_SELECTION	67
231 #define	_SC_CPUTIME		68
232 #define	_SC_FILE_LOCKING	69
233 #define	_SC_GETGR_R_SIZE_MAX	70 /* user */
234 #define	_SC_GETPW_R_SIZE_MAX	71 /* user */
235 #define	_SC_HOST_NAME_MAX	72
236 #define	_SC_LOGIN_NAME_MAX	73
237 #define	_SC_MONOTONIC_CLOCK	74
238 #define	_SC_MQ_PRIO_MAX		75
239 #define	_SC_READER_WRITER_LOCKS	76 /* user */
240 #define	_SC_REGEXP		77 /* user */
241 #define	_SC_SHELL		78 /* user */
242 #define	_SC_SPAWN		79 /* user */
243 #define	_SC_SPIN_LOCKS		80 /* user */
244 #define	_SC_SPORADIC_SERVER	81
245 #define	_SC_THREAD_ATTR_STACKADDR 82 /* user */
246 #define	_SC_THREAD_ATTR_STACKSIZE 83 /* user */
247 #define	_SC_THREAD_CPUTIME	84 /* user */
248 #define	_SC_THREAD_DESTRUCTOR_ITERATIONS 85 /* user */
249 #define	_SC_THREAD_KEYS_MAX	86 /* user */
250 #define	_SC_THREAD_PRIO_INHERIT	87 /* user */
251 #define	_SC_THREAD_PRIO_PROTECT	88 /* user */
252 #define	_SC_THREAD_PRIORITY_SCHEDULING 89 /* user */
253 #define	_SC_THREAD_PROCESS_SHARED 90 /* user */
254 #define	_SC_THREAD_SAFE_FUNCTIONS 91 /* user */
255 #define	_SC_THREAD_SPORADIC_SERVER 92 /* user */
256 #define	_SC_THREAD_STACK_MIN	93 /* user */
257 #define	_SC_THREAD_THREADS_MAX	94 /* user */
258 #define	_SC_TIMEOUTS		95 /* user */
259 #define	_SC_THREADS		96 /* user */
260 #define	_SC_TRACE		97 /* user */
261 #define	_SC_TRACE_EVENT_FILTER	98 /* user */
262 #define	_SC_TRACE_INHERIT	99 /* user */
263 #define	_SC_TRACE_LOG		100 /* user */
264 #define	_SC_TTY_NAME_MAX	101 /* user */
265 #define	_SC_TYPED_MEMORY_OBJECTS 102
266 #define	_SC_V6_ILP32_OFF32	103 /* user */
267 #define	_SC_V6_ILP32_OFFBIG	104 /* user */
268 #define	_SC_V6_LP64_OFF64	105 /* user */
269 #define	_SC_V6_LPBIG_OFFBIG	106 /* user */
270 #define	_SC_IPV6		118
271 #define	_SC_RAW_SOCKETS		119
272 #define	_SC_SYMLOOP_MAX		120
273 #endif
274 
275 #if __XSI_VISIBLE
276 #define	_SC_ATEXIT_MAX		107 /* user */
277 #define	_SC_IOV_MAX		56
278 #define	_SC_PAGE_SIZE		_SC_PAGESIZE
279 #define	_SC_XOPEN_CRYPT		108 /* user */
280 #define	_SC_XOPEN_ENH_I18N	109 /* user */
281 #define	_SC_XOPEN_LEGACY	110 /* user */
282 #define	_SC_XOPEN_REALTIME	111
283 #define	_SC_XOPEN_REALTIME_THREADS 112
284 #define	_SC_XOPEN_SHM		113
285 #define	_SC_XOPEN_STREAMS	114
286 #define	_SC_XOPEN_UNIX		115
287 #define	_SC_XOPEN_VERSION	116
288 #define	_SC_XOPEN_XCU_VERSION	117 /* user */
289 #endif
290 
291 #if __BSD_VISIBLE
292 #define	_SC_NPROCESSORS_CONF	57
293 #define	_SC_NPROCESSORS_ONLN	58
294 #define	_SC_CPUSET_SIZE		122
295 #endif
296 
297 /* Extensions found in Solaris and Linux. */
298 #define	_SC_PHYS_PAGES		121
299 
300 /* Keys for the confstr(3) function. */
301 #if __POSIX_VISIBLE >= 199209
302 #define	_CS_PATH		1	/* default value of PATH */
303 #endif
304 
305 #if __POSIX_VISIBLE >= 200112
306 #define	_CS_POSIX_V6_ILP32_OFF32_CFLAGS		2
307 #define	_CS_POSIX_V6_ILP32_OFF32_LDFLAGS	3
308 #define	_CS_POSIX_V6_ILP32_OFF32_LIBS		4
309 #define	_CS_POSIX_V6_ILP32_OFFBIG_CFLAGS	5
310 #define	_CS_POSIX_V6_ILP32_OFFBIG_LDFLAGS	6
311 #define	_CS_POSIX_V6_ILP32_OFFBIG_LIBS		7
312 #define	_CS_POSIX_V6_LP64_OFF64_CFLAGS		8
313 #define	_CS_POSIX_V6_LP64_OFF64_LDFLAGS		9
314 #define	_CS_POSIX_V6_LP64_OFF64_LIBS		10
315 #define	_CS_POSIX_V6_LPBIG_OFFBIG_CFLAGS	11
316 #define	_CS_POSIX_V6_LPBIG_OFFBIG_LDFLAGS	12
317 #define	_CS_POSIX_V6_LPBIG_OFFBIG_LIBS		13
318 #define	_CS_POSIX_V6_WIDTH_RESTRICTED_ENVS	14
319 #endif
320 
321 __BEGIN_DECLS
322 /* 1003.1-1990 */
323 void	 _exit(int) __dead2;
324 int	 access(const char *, int);
325 unsigned int	 alarm(unsigned int);
326 int	 chdir(const char *);
327 int	 chown(const char *, uid_t, gid_t);
328 int	 close(int);
329 void	 closefrom(int);
330 int	 dup(int);
331 int	 dup2(int, int);
332 int	 execl(const char *, const char *, ...) __null_sentinel;
333 int	 execle(const char *, const char *, ...);
334 int	 execlp(const char *, const char *, ...) __null_sentinel;
335 int	 execv(const char *, char * const *);
336 int	 execve(const char *, char * const *, char * const *);
337 int	 execvp(const char *, char * const *);
338 pid_t	 fork(void);
339 long	 fpathconf(int, int);
340 char	*getcwd(char *, size_t);
341 gid_t	 getegid(void);
342 uid_t	 geteuid(void);
343 gid_t	 getgid(void);
344 int	 getgroups(int, gid_t []);
345 char	*getlogin(void);
346 pid_t	 getpgrp(void);
347 pid_t	 getpid(void);
348 pid_t	 getppid(void);
349 uid_t	 getuid(void);
350 int	 isatty(int);
351 int	 link(const char *, const char *);
352 #ifndef _LSEEK_DECLARED
353 #define	_LSEEK_DECLARED
354 off_t	 lseek(int, off_t, int);
355 #endif
356 long	 pathconf(const char *, int);
357 int	 pause(void);
358 int	 pipe(int *);
359 ssize_t	 read(int, void *, size_t);
360 int	 rmdir(const char *);
361 int	 setgid(gid_t);
362 int	 setpgid(pid_t, pid_t);
363 pid_t	 setsid(void);
364 int	 setuid(uid_t);
365 unsigned int	 sleep(unsigned int);
366 long	 sysconf(int);
367 pid_t	 tcgetpgrp(int);
368 int	 tcsetpgrp(int, pid_t);
369 char	*ttyname(int);
370 int	ttyname_r(int, char *, size_t);
371 int	 unlink(const char *);
372 ssize_t	 write(int, const void *, size_t);
373 
374 /* 1003.2-1992 */
375 #if __POSIX_VISIBLE >= 199209 || __XSI_VISIBLE
376 size_t	 confstr(int, char *, size_t);
377 #ifndef _GETOPT_DECLARED
378 #define	_GETOPT_DECLARED
379 int	 getopt(int, char * const [], const char *);
380 
381 extern char *optarg;			/* getopt(3) external variables */
382 extern int optind, opterr, optopt;
383 #endif /* _GETOPT_DECLARED */
384 #endif
385 
386 /* ISO/IEC 9945-1: 1996 */
387 #if __POSIX_VISIBLE >= 199506 || __XSI_VISIBLE
388 int	 fsync(int);
389 int	 fdatasync(int);
390 
391 /*
392  * ftruncate() was in the POSIX Realtime Extension (it's used for shared
393  * memory), but truncate() was not.
394  */
395 #ifndef _FTRUNCATE_DECLARED
396 #define	_FTRUNCATE_DECLARED
397 int	 ftruncate(int, off_t);
398 #endif
399 #endif
400 
401 #if __POSIX_VISIBLE >= 199506
402 int	 getlogin_r(char *, int);
403 #endif
404 
405 /* 1003.1-2001 */
406 #if __POSIX_VISIBLE >= 200112 || __XSI_VISIBLE
407 int	 fchown(int, uid_t, gid_t);
408 ssize_t	 readlink(const char * __restrict, char * __restrict, size_t);
409 #endif
410 #if __POSIX_VISIBLE >= 200112
411 int	 gethostname(char *, size_t);
412 int	 setegid(gid_t);
413 int	 seteuid(uid_t);
414 #endif
415 
416 /* 1003.1-2008 */
417 #if __POSIX_VISIBLE >= 200809 || __XSI_VISIBLE
418 int	 getsid(pid_t _pid);
419 int	 fchdir(int);
420 int	 getpgid(pid_t _pid);
421 int	 lchown(const char *, uid_t, gid_t);
422 ssize_t	 pread(int, void *, size_t, off_t);
423 ssize_t	 pwrite(int, const void *, size_t, off_t);
424 
425 /* See comment at ftruncate() above. */
426 #ifndef _TRUNCATE_DECLARED
427 #define	_TRUNCATE_DECLARED
428 int	 truncate(const char *, off_t);
429 #endif
430 #endif /* __POSIX_VISIBLE >= 200809 || __XSI_VISIBLE */
431 
432 #if __POSIX_VISIBLE >= 200809
433 int	faccessat(int, const char *, int, int);
434 int	fchownat(int, const char *, uid_t, gid_t, int);
435 int	fexecve(int, char *const [], char *const []);
436 int	linkat(int, const char *, int, const char *, int);
437 ssize_t	readlinkat(int, const char * __restrict, char * __restrict, size_t);
438 int	symlinkat(const char *, int, const char *);
439 int	unlinkat(int, const char *, int);
440 #endif /* __POSIX_VISIBLE >= 200809 */
441 
442 /*
443  * symlink() was originally in POSIX.1a, which was withdrawn after
444  * being overtaken by events (1003.1-2001).  It was in XPG4.2, and of
445  * course has been in BSD since 4.2.
446  */
447 #if __POSIX_VISIBLE >= 200112 || __XSI_VISIBLE >= 402
448 int	 symlink(const char * __restrict, const char * __restrict);
449 #endif
450 
451 /* X/Open System Interfaces */
452 #if __XSI_VISIBLE
453 char	*crypt(const char *, const char *);
454 long	 gethostid(void);
455 int	 lockf(int, int, off_t);
456 int	 nice(int);
457 int	 setregid(gid_t, gid_t);
458 int	 setreuid(uid_t, uid_t);
459 
460 #ifndef _SWAB_DECLARED
461 #define _SWAB_DECLARED
462 void	 swab(const void * __restrict, void * __restrict, ssize_t);
463 #endif /* _SWAB_DECLARED */
464 
465 void	 sync(void);
466 
467 #endif /* __XSI_VISIBLE */
468 
469 #if (__XSI_VISIBLE && __XSI_VISIBLE <= 500) || __BSD_VISIBLE
470 int	 brk(const void *);
471 int	 chroot(const char *);
472 int	 getdtablesize(void);
473 int	 getpagesize(void) __pure2;
474 char	*getpass(const char *);
475 void	*sbrk(intptr_t);
476 #endif
477 
478 #if (__XSI_VISIBLE && __XSI_VISIBLE <= 600) || __BSD_VISIBLE
479 char	*getwd(char *);			/* obsoleted by getcwd() */
480 useconds_t
481 	 ualarm(useconds_t, useconds_t);
482 int	 usleep(useconds_t);
483 pid_t	 vfork(void) __returns_twice;
484 #endif
485 
486 #if __BSD_VISIBLE
487 struct timeval;				/* select(2) */
488 
489 struct crypt_data {
490 	int	initialized;	/* For compatibility with glibc. */
491 	char	__buf[256];	/* Buffer returned by crypt_r(). */
492 };
493 
494 int	 acct(const char *);
495 int	 async_daemon(void);
496 int	 check_utility_compat(const char *);
497 const char *
498 	 crypt_get_format(void);
499 char	*crypt_r(const char *, const char *, struct crypt_data *);
500 int	 crypt_set_format(const char *);
501 int	 dup3(int, int, int);
502 int	 eaccess(const char *, int);
503 void	 endusershell(void);
504 int	 exect(const char *, char * const *, char * const *);
505 int	 execvP(const char *, const char *, char * const *);
506 int	 feature_present(const char *);
507 char	*fflagstostr(u_long);
508 int	 getdomainname(char *, int);
509 int	 getentropy(void *, size_t);
510 int	 getgrouplist(const char *, gid_t, gid_t *, int *);
511 int	 getloginclass(char *, size_t);
512 mode_t	 getmode(const void *, mode_t);
513 int	 getosreldate(void);
514 int	 getpeereid(int, uid_t *, gid_t *);
515 int	 getresgid(gid_t *, gid_t *, gid_t *);
516 int	 getresuid(uid_t *, uid_t *, uid_t *);
517 char	*getusershell(void);
518 int	 initgroups(const char *, gid_t);
519 int	 iruserok(unsigned long, int, const char *, const char *);
520 int	 iruserok_sa(const void *, int, int, const char *, const char *);
521 int	 issetugid(void);
522 void	__FreeBSD_libc_enter_restricted_mode(void);
523 long	 lpathconf(const char *, int);
524 #ifndef _MKDTEMP_DECLARED
525 char	*mkdtemp(char *);
526 #define	_MKDTEMP_DECLARED
527 #endif
528 #ifndef	_MKNOD_DECLARED
529 int	 mknod(const char *, mode_t, dev_t);
530 #define	_MKNOD_DECLARED
531 #endif
532 #ifndef _MKSTEMP_DECLARED
533 int	 mkstemp(char *);
534 #define	_MKSTEMP_DECLARED
535 #endif
536 int	 mkstemps(char *, int);
537 #ifndef _MKTEMP_DECLARED
538 char	*mktemp(char *);
539 #define	_MKTEMP_DECLARED
540 #endif
541 int	 nfssvc(int, void *);
542 int	 nlm_syscall(int, int, int, char **);
543 int	 pipe2(int *, int);
544 int	 profil(char *, size_t, vm_offset_t, int);
545 int	 rcmd(char **, int, const char *, const char *, const char *, int *);
546 int	 rcmd_af(char **, int, const char *,
547 		const char *, const char *, int *, int);
548 int	 rcmdsh(char **, int, const char *,
549 		const char *, const char *, const char *);
550 char	*re_comp(const char *);
551 int	 re_exec(const char *);
552 int	 reboot(int);
553 int	 revoke(const char *);
554 pid_t	 rfork(int);
555 pid_t	 rfork_thread(int, void *, int (*)(void *), void *);
556 int	 rresvport(int *);
557 int	 rresvport_af(int *, int);
558 int	 ruserok(const char *, int, const char *, const char *);
559 #if __BSD_VISIBLE
560 #ifndef _SELECT_DECLARED
561 #define	_SELECT_DECLARED
562 int	 select(int, fd_set *, fd_set *, fd_set *, struct timeval *);
563 #endif
564 #endif
565 int	 setdomainname(const char *, int);
566 int	 setgroups(int, const gid_t *);
567 void	 sethostid(long);
568 int	 sethostname(const char *, int);
569 int	 setlogin(const char *);
570 int	 setloginclass(const char *);
571 void	*setmode(const char *);
572 int	 setpgrp(pid_t, pid_t);			/* obsoleted by setpgid() */
573 void	 setproctitle(const char *_fmt, ...) __printf0like(1, 2);
574 void	 setproctitle_fast(const char *_fmt, ...) __printf0like(1, 2);
575 int	 setresgid(gid_t, gid_t, gid_t);
576 int	 setresuid(uid_t, uid_t, uid_t);
577 int	 setrgid(gid_t);
578 int	 setruid(uid_t);
579 void	 setusershell(void);
580 int	 strtofflags(char **, u_long *, u_long *);
581 int	 swapon(const char *);
582 int	 swapoff(const char *);
583 int	 syscall(int, ...);
584 off_t	 __syscall(quad_t, ...);
585 int	 undelete(const char *);
586 int	 unwhiteout(const char *);
587 void	*valloc(size_t);			/* obsoleted by malloc() */
588 int	 funlinkat(int, const char *, int, int);
589 
590 #ifndef _OPTRESET_DECLARED
591 #define	_OPTRESET_DECLARED
592 extern int optreset;			/* getopt(3) external variable */
593 #endif
594 #endif /* __BSD_VISIBLE */
595 __END_DECLS
596 
597 #endif /* !_UNISTD_H_ */
598