/*      $OpenBSD: unistd.h,v 1.113 2025/10/07 12:02:21 brynet Exp $ */
/*      $NetBSD: unistd.h,v 1.26.4.1 1996/05/28 02:31:51 mrg Exp $      */

/*-
 * Copyright (c) 1991 The Regents of the University of California.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 *      @(#)unistd.h    5.13 (Berkeley) 6/17/91
 */

#ifndef _UNISTD_H_
#define _UNISTD_H_

#include <sys/_null.h>
#include <sys/types.h>
#include <sys/unistd.h>

#define STDIN_FILENO    0       /* standard input file descriptor */
#define STDOUT_FILENO   1       /* standard output file descriptor */
#define STDERR_FILENO   2       /* standard error file descriptor */

#if __XPG_VISIBLE || __POSIX_VISIBLE >= 200112
#define F_ULOCK         0       /* unlock locked section */
#define F_LOCK          1       /* lock a section for exclusive use */
#define F_TLOCK         2       /* test and lock a section for exclusive use */
#define F_TEST          3       /* test a section for locks by other procs */
#endif

/*
 * POSIX options and option groups we unconditionally do or don't
 * implement.  Please keep this list in alphabetical order.
 *
 * Anything which is defined as zero below **must** have an
 * implementation for the corresponding sysconf() which is able to
 * determine conclusively whether or not the feature is supported.
 * Anything which is defined as other than -1 below **must** have
 * complete headers, types, and function declarations as specified by
 * the POSIX standard; however, if the relevant sysconf() function
 * returns -1, the functions may be stubbed out.
 */
#define _POSIX_ADVISORY_INFO                    (-1)
#define _POSIX_ASYNCHRONOUS_IO                  (-1)
#define _POSIX_BARRIERS                         200112L
#define _POSIX_CHOWN_RESTRICTED                 1
#define _POSIX_CLOCK_SELECTION                  (-1)
#define _POSIX_CPUTIME                          200809L
#define _POSIX_FSYNC                            200112L
#define _POSIX_IPV6                             0
#define _POSIX_JOB_CONTROL                      1
#define _POSIX_MAPPED_FILES                     200112L
#define _POSIX_MEMLOCK                          200112L
#define _POSIX_MEMLOCK_RANGE                    200112L
#define _POSIX_MEMORY_PROTECTION                200112L
#define _POSIX_MESSAGE_PASSING                  (-1)
#define _POSIX_MONOTONIC_CLOCK                  200112L
#define _POSIX_NO_TRUNC                         1
#define _POSIX_PRIORITIZED_IO                   (-1)
#define _POSIX_PRIORITY_SCHEDULING              (-1)
#define _POSIX_RAW_SOCKETS                      200112L
#define _POSIX_READER_WRITER_LOCKS              200112L
#define _POSIX_REALTIME_SIGNALS                 (-1)
#define _POSIX_REGEXP                           1
#define _POSIX_SAVED_IDS                        1
#define _POSIX_SEMAPHORES                       200112L
#define _POSIX_SHARED_MEMORY_OBJECTS            200809L
#define _POSIX_SHELL                            1
#define _POSIX_SPAWN                            200112L
#define _POSIX_SPIN_LOCKS                       200112L
#define _POSIX_SPORADIC_SERVER                  (-1)
#define _POSIX_SYNCHRONIZED_IO                  (-1)
#define _POSIX_THREAD_ATTR_STACKADDR            200112L
#define _POSIX_THREAD_ATTR_STACKSIZE            200112L
#define _POSIX_THREAD_CPUTIME                   200809L
#define _POSIX_THREAD_PRIO_INHERIT              (-1)
#define _POSIX_THREAD_PRIO_PROTECT              (-1)
#define _POSIX_THREAD_PRIORITY_SCHEDULING       (-1)
#define _POSIX_THREAD_PROCESS_SHARED            (-1)
#define _POSIX_THREAD_ROBUST_PRIO_INHERIT       (-1)
#define _POSIX_THREAD_ROBUST_PRIO_PROTECT       (-1)
#define _POSIX_THREAD_SAFE_FUNCTIONS            200112L
#define _POSIX_THREAD_SPORADIC_SERVER           (-1)
#define _POSIX_THREADS                          200112L
#define _POSIX_TIMEOUTS                         200112L
#define _POSIX_TIMERS                           (-1)
#define _POSIX_TRACE                            (-1)
#define _POSIX_TRACE_EVENT_FILTER               (-1)
#define _POSIX_TRACE_INHERIT                    (-1)
#define _POSIX_TRACE_LOG                        (-1)
#define _POSIX_TYPED_MEMORY_OBJECTS             (-1)
#define _POSIX2_C_BIND                          200112L
#define _POSIX2_C_DEV                           (-1) /* need C99 utility */
#define _POSIX2_CHAR_TERM                       1
#define _POSIX2_FORT_DEV                        (-1) /* need fort77 utility */
#define _POSIX2_FORT_RUN                        (-1) /* need asa utility */
#define _POSIX2_LOCALEDEF                       (-1)
#define _POSIX2_PBS                             (-1)
#define _POSIX2_PBS_ACCOUNTING                  (-1)
#define _POSIX2_PBS_CHECKPOINT                  (-1)
#define _POSIX2_PBS_LOCATE                      (-1)
#define _POSIX2_PBS_MESSAGE                     (-1)
#define _POSIX2_PBS_TRACK                       (-1)
#define _POSIX2_SW_DEV                          200112L
#define _POSIX2_UPE                             200112L
#define _POSIX_V6_ILP32_OFF32                   (-1)
#define _POSIX_V6_ILP32_OFFBIG                  0
#define _POSIX_V6_LP64_OFF64                    0
#define _POSIX_V6_LPBIG_OFFBIG                  0
#define _POSIX_V7_ILP32_OFF32                   (-1)
#define _POSIX_V7_ILP32_OFFBIG                  0
#define _POSIX_V7_LP64_OFF64                    0
#define _POSIX_V7_LPBIG_OFFBIG                  0

#define _XOPEN_CRYPT                            1
#define _XOPEN_ENH_I18N                         (-1) /* mandatory in XSI */
#define _XOPEN_LEGACY                           (-1)
#define _XOPEN_REALTIME                         (-1)
#define _XOPEN_REALTIME_THREADS                 (-1)
#define _XOPEN_SHM                              1
#define _XOPEN_STREAMS                          (-1)
#define _XOPEN_UUCP                             (-1)
#define _XOPEN_UNIX                             (-1)

/* Define the POSIX.2 version we target for compliance. */
#define _POSIX2_VERSION                         200809L

/* the sysconf(3) variable values are part of the ABI */

/* configurable system variables */
#define _SC_ARG_MAX              1
#define _SC_CHILD_MAX            2
#define _SC_CLK_TCK              3
#define _SC_NGROUPS_MAX          4
#define _SC_OPEN_MAX             5
#define _SC_JOB_CONTROL          6
#define _SC_SAVED_IDS            7
#define _SC_VERSION              8
#define _SC_BC_BASE_MAX          9
#define _SC_BC_DIM_MAX          10
#define _SC_BC_SCALE_MAX        11
#define _SC_BC_STRING_MAX       12
#define _SC_COLL_WEIGHTS_MAX    13
#define _SC_EXPR_NEST_MAX       14
#define _SC_LINE_MAX            15
#define _SC_RE_DUP_MAX          16
#define _SC_2_VERSION           17
#define _SC_2_C_BIND            18
#define _SC_2_C_DEV             19
#define _SC_2_CHAR_TERM         20
#define _SC_2_FORT_DEV          21
#define _SC_2_FORT_RUN          22
#define _SC_2_LOCALEDEF         23
#define _SC_2_SW_DEV            24
#define _SC_2_UPE               25
#define _SC_STREAM_MAX          26
#define _SC_TZNAME_MAX          27
#define _SC_PAGESIZE            28
#define _SC_PAGE_SIZE           _SC_PAGESIZE    /* 1170 compatibility */
#define _SC_FSYNC               29
#define _SC_XOPEN_SHM           30
#define _SC_SEM_NSEMS_MAX       31
#define _SC_SEM_VALUE_MAX       32
#define _SC_HOST_NAME_MAX       33
#define _SC_MONOTONIC_CLOCK     34
#define _SC_2_PBS               35
#define _SC_2_PBS_ACCOUNTING    36
#define _SC_2_PBS_CHECKPOINT    37
#define _SC_2_PBS_LOCATE        38
#define _SC_2_PBS_MESSAGE       39
#define _SC_2_PBS_TRACK         40
#define _SC_ADVISORY_INFO       41
#define _SC_AIO_LISTIO_MAX      42
#define _SC_AIO_MAX             43
#define _SC_AIO_PRIO_DELTA_MAX  44
#define _SC_ASYNCHRONOUS_IO     45
#define _SC_ATEXIT_MAX          46
#define _SC_BARRIERS            47
#define _SC_CLOCK_SELECTION     48
#define _SC_CPUTIME             49
#define _SC_DELAYTIMER_MAX      50
#define _SC_IOV_MAX             51
#define _SC_IPV6                52
#define _SC_MAPPED_FILES        53
#define _SC_MEMLOCK             54
#define _SC_MEMLOCK_RANGE       55
#define _SC_MEMORY_PROTECTION   56
#define _SC_MESSAGE_PASSING     57
#define _SC_MQ_OPEN_MAX         58
#define _SC_MQ_PRIO_MAX         59
#define _SC_PRIORITIZED_IO      60
#define _SC_PRIORITY_SCHEDULING 61
#define _SC_RAW_SOCKETS         62
#define _SC_READER_WRITER_LOCKS 63
#define _SC_REALTIME_SIGNALS    64
#define _SC_REGEXP              65
#define _SC_RTSIG_MAX           66
#define _SC_SEMAPHORES          67
#define _SC_SHARED_MEMORY_OBJECTS 68
#define _SC_SHELL               69
#define _SC_SIGQUEUE_MAX        70
#define _SC_SPAWN               71
#define _SC_SPIN_LOCKS          72
#define _SC_SPORADIC_SERVER     73
#define _SC_SS_REPL_MAX         74
#define _SC_SYNCHRONIZED_IO     75
#define _SC_SYMLOOP_MAX         76
#define _SC_THREAD_ATTR_STACKADDR 77
#define _SC_THREAD_ATTR_STACKSIZE 78
#define _SC_THREAD_CPUTIME      79
#define _SC_THREAD_DESTRUCTOR_ITERATIONS 80
#define _SC_THREAD_KEYS_MAX     81
#define _SC_THREAD_PRIO_INHERIT 82
#define _SC_THREAD_PRIO_PROTECT 83
#define _SC_THREAD_PRIORITY_SCHEDULING 84
#define _SC_THREAD_PROCESS_SHARED 85
#define _SC_THREAD_ROBUST_PRIO_INHERIT 86
#define _SC_THREAD_ROBUST_PRIO_PROTECT 87
#define _SC_THREAD_SPORADIC_SERVER 88
#define _SC_THREAD_STACK_MIN    89
#define _SC_THREAD_THREADS_MAX  90
#define _SC_THREADS             91
#define _SC_TIMEOUTS            92
#define _SC_TIMER_MAX           93
#define _SC_TIMERS              94
#define _SC_TRACE               95
#define _SC_TRACE_EVENT_FILTER  96
#define _SC_TRACE_EVENT_NAME_MAX 97
#define _SC_TRACE_INHERIT       98
#define _SC_TRACE_LOG           99
#define _SC_GETGR_R_SIZE_MAX    100
#define _SC_GETPW_R_SIZE_MAX    101
#define _SC_LOGIN_NAME_MAX      102
#define _SC_THREAD_SAFE_FUNCTIONS 103
#define _SC_TRACE_NAME_MAX      104
#define _SC_TRACE_SYS_MAX       105
#define _SC_TRACE_USER_EVENT_MAX 106
#define _SC_TTY_NAME_MAX        107
#define _SC_TYPED_MEMORY_OBJECTS 108
#define _SC_V6_ILP32_OFF32      109
#define _SC_V6_ILP32_OFFBIG     110
#define _SC_V6_LP64_OFF64       111
#define _SC_V6_LPBIG_OFFBIG     112
#define _SC_V7_ILP32_OFF32      113
#define _SC_V7_ILP32_OFFBIG     114
#define _SC_V7_LP64_OFF64       115
#define _SC_V7_LPBIG_OFFBIG     116
#define _SC_XOPEN_CRYPT         117
#define _SC_XOPEN_ENH_I18N      118
#define _SC_XOPEN_LEGACY        119
#define _SC_XOPEN_REALTIME      120
#define _SC_XOPEN_REALTIME_THREADS 121
#define _SC_XOPEN_STREAMS       122
#define _SC_XOPEN_UNIX          123
#define _SC_XOPEN_UUCP          124
#define _SC_XOPEN_VERSION       125

#define _SC_PHYS_PAGES          500
#define _SC_AVPHYS_PAGES        501
#define _SC_NPROCESSORS_CONF    502
#define _SC_NPROCESSORS_ONLN    503

/* configurable system strings */
#define _CS_PATH                                 1
#define _CS_POSIX_V6_ILP32_OFF32_CFLAGS          2
#define _CS_POSIX_V6_ILP32_OFF32_LDFLAGS         3
#define _CS_POSIX_V6_ILP32_OFF32_LIBS            4
#define _CS_POSIX_V6_ILP32_OFFBIG_CFLAGS         5
#define _CS_POSIX_V6_ILP32_OFFBIG_LDFLAGS        6
#define _CS_POSIX_V6_ILP32_OFFBIG_LIBS           7
#define _CS_POSIX_V6_LP64_OFF64_CFLAGS           8
#define _CS_POSIX_V6_LP64_OFF64_LDFLAGS          9
#define _CS_POSIX_V6_LP64_OFF64_LIBS            10
#define _CS_POSIX_V6_LPBIG_OFFBIG_CFLAGS        11
#define _CS_POSIX_V6_LPBIG_OFFBIG_LDFLAGS       12
#define _CS_POSIX_V6_LPBIG_OFFBIG_LIBS          13
#define _CS_POSIX_V6_WIDTH_RESTRICTED_ENVS      14
#define _CS_V6_ENV                              15
#define _CS_POSIX_V7_ILP32_OFF32_CFLAGS         16
#define _CS_POSIX_V7_ILP32_OFF32_LDFLAGS        17
#define _CS_POSIX_V7_ILP32_OFF32_LIBS           18
#define _CS_POSIX_V7_ILP32_OFFBIG_CFLAGS        19
#define _CS_POSIX_V7_ILP32_OFFBIG_LDFLAGS       20
#define _CS_POSIX_V7_ILP32_OFFBIG_LIBS          21
#define _CS_POSIX_V7_LP64_OFF64_CFLAGS          22
#define _CS_POSIX_V7_LP64_OFF64_LDFLAGS         23
#define _CS_POSIX_V7_LP64_OFF64_LIBS            24
#define _CS_POSIX_V7_LPBIG_OFFBIG_CFLAGS        25
#define _CS_POSIX_V7_LPBIG_OFFBIG_LDFLAGS       26
#define _CS_POSIX_V7_LPBIG_OFFBIG_LIBS          27
#define _CS_POSIX_V7_THREADS_CFLAGS             28
#define _CS_POSIX_V7_THREADS_LDFLAGS            29
#define _CS_POSIX_V7_WIDTH_RESTRICTED_ENVS      30
#define _CS_V7_ENV                              31

#ifndef _INTPTR_T_DEFINED_
#define _INTPTR_T_DEFINED_
typedef __intptr_t              intptr_t;
#endif

__BEGIN_DECLS
__dead void      _exit(int);
int      access(const char *, int);
unsigned int alarm(unsigned int);
int      chdir(const char *);
int      chown(const char *, uid_t, gid_t);
int      close(int);
int      dup(int);
int      dup2(int, int);
int      execl(const char *, const char *, ...) 
            __attribute__((__sentinel__));
int      execle(const char *, const char *, ...);
int      execlp(const char *, const char *, ...) 
            __attribute__((__sentinel__));
int      execv(const char *, char *const *);
int      execve(const char *, char *const *, char *const *);
int      execvp(const char *, char *const *);
#if __BSD_VISIBLE
int      execvpe(const char *, char *const *, char *const *);
#endif
pid_t    fork(void);
long     fpathconf(int, int);
char    *getcwd(char *, size_t)
                __attribute__((__bounded__(__string__,1,2)));
gid_t    getegid(void);
uid_t    geteuid(void);
gid_t    getgid(void);
int      getgroups(int, gid_t *);
char    *getlogin(void);
pid_t    getpgrp(void);
pid_t    getpid(void);
pid_t    getppid(void);
uid_t    getuid(void);
int      isatty(int);
int      link(const char *, const char *);
off_t    lseek(int, off_t, int);
long     pathconf(const char *, int);
#if __BSD_VISIBLE
long     pathconfat(int, const char *, int, int);
#endif
int      pause(void);
int      pipe(int *);
ssize_t  read(int, void *, size_t)
                __attribute__((__bounded__(__buffer__,2,3)));
int      rmdir(const char *);
int      setgid(gid_t);
int      setuid(uid_t);
unsigned int sleep(unsigned int);
long     sysconf(int);
pid_t    tcgetpgrp(int);
int      tcsetpgrp(int, pid_t);
char    *ttyname(int);
int      unlink(const char *);
ssize_t  write(int, const void *, size_t)
                __attribute__((__bounded__(__buffer__,2,3)));

#if __POSIX_VISIBLE || __XPG_VISIBLE >= 300
pid_t    setsid(void);
int      setpgid(pid_t, pid_t);
#endif

#if __POSIX_VISIBLE >= 199209 || __XPG_VISIBLE
size_t   confstr(int, char *, size_t)
                __attribute__((__bounded__(__string__,2,3)));
#ifndef _GETOPT_DEFINED_
#define _GETOPT_DEFINED_
int      getopt(int, char * const *, const char *);
extern   char *optarg;                  /* getopt(3) external variables */
extern   int opterr, optind, optopt, optreset;
#endif /* _GETOPT_DEFINED_ */
#endif

#if __POSIX_VISIBLE >= 199506 || __XPG_VISIBLE
int      fsync(int);
int      ftruncate(int, off_t);
int      getlogin_r(char *, size_t)
                __attribute__((__bounded__(__string__,1,2)));
ssize_t  readlink(const char * __restrict, char * __restrict, size_t)
                __attribute__ ((__bounded__(__string__,2,3)));
#endif
#if __POSIX_VISIBLE >= 199506
int      fdatasync(int);
#endif

#if __XPG_VISIBLE || __BSD_VISIBLE
char    *crypt(const char *, const char *);
int      fchdir(int);
int      fchown(int, uid_t, gid_t);
long     gethostid(void);
char    *getwd(char *)
                __attribute__ ((__bounded__(__minbytes__,1,1024)));
int      lchown(const char *, uid_t, gid_t);
int      mkstemp(char *);
char    *mktemp(char *);
int      nice(int);
int      setregid(gid_t, gid_t);
int      setreuid(uid_t, uid_t);
void     swab(const void *__restrict, void *__restrict, ssize_t);
void     sync(void);
int      truncate(const char *, off_t);
useconds_t       ualarm(useconds_t, useconds_t);
int      usleep(useconds_t);
pid_t    vfork(void);
#endif

#if __POSIX_VISIBLE >= 200809 || __XPG_VISIBLE >= 420
pid_t    getpgid(pid_t);
pid_t    getsid(pid_t);
#endif

#if __XPG_VISIBLE >= 500
ssize_t  pread(int, void *, size_t, off_t)
                __attribute__((__bounded__(__buffer__,2,3)));
ssize_t  pwrite(int, const void *, size_t, off_t)
                __attribute__((__bounded__(__buffer__,2,3)));
int      ttyname_r(int, char *, size_t)
            __attribute__((__bounded__(__string__,2,3)));
#endif

#if __BSD_VISIBLE ||  __XPG_VISIBLE <= 500
/* Interfaces withdrawn by X/Open Issue 5 Version 0 */
int      brk(void *);
int      chroot(const char *);
int      getdtablesize(void);
int      getpagesize(void);
char    *getpass(const char *);
void    *sbrk(int);
#endif

#if __POSIX_VISIBLE >= 200112 || __XPG_VISIBLE >= 420
int     lockf(int, int, off_t);
#endif

#if __POSIX_VISIBLE >= 200112 || __XPG_VISIBLE >= 420 || __BSD_VISIBLE
int      symlink(const char *, const char *);
int      gethostname(char *, size_t)
                __attribute__ ((__bounded__(__string__,1,2)));
int      setegid(gid_t);
int      seteuid(uid_t);
#endif

#if __POSIX_VISIBLE >= 200809
int     faccessat(int, const char *, int, int);
int     fchownat(int, const char *, uid_t, gid_t, int);
int     linkat(int, const char *, int, const char *, int);
ssize_t readlinkat(int, const char *, char *, size_t)
                __attribute__ ((__bounded__(__string__,3,4)));
int     symlinkat(const char *, int, const char *);
int     unlinkat(int, const char *, int);
#endif

#if __POSIX_VISIBLE >= 202405 || __BSD_VISIBLE
int     getentropy(void *, size_t);
#endif
#if __XPG_VISIBLE >= 800 || __BSD_VISIBLE
int     getresgid(gid_t *, gid_t *, gid_t *);
int     getresuid(uid_t *, uid_t *, uid_t *);
int     setresgid(gid_t, gid_t, gid_t);
int     setresuid(uid_t, uid_t, uid_t);
#endif

#if __BSD_VISIBLE
int     dup3(int, int, int);
int     pipe2(int [2], int);
#endif

#if __BSD_VISIBLE
int      acct(const char *);
int      closefrom(int);
int      crypt_checkpass(const char *, const char *);
int      crypt_newhash(const char *, const char *, char *, size_t);
void     endusershell(void);
char    *fflagstostr(u_int32_t);
int      getdomainname(char *, size_t)
                __attribute__ ((__bounded__(__string__,1,2)));
int      getdtablecount(void);
int      getgrouplist(const char *, gid_t, gid_t *, int *);
mode_t   getmode(const void *, mode_t);
pid_t    getthrid(void);
int      getthrname(pid_t, char *, size_t);
char    *getusershell(void);
int      initgroups(const char *, gid_t);
int      issetugid(void);
char    *mkdtemp(char *);
int      mkstemps(char *, int);
int      nfssvc(int, void *);
int      profil(void *, size_t, size_t, unsigned long, unsigned int, int)
                __attribute__ ((__bounded__(__string__,1,2)));
int      quotactl(const char *, int, int, char *);
int      rcmd(char **, int, const char *,
            const char *, const char *, int *);
int      rcmd_af(char **, int, const char *,
            const char *, const char *, int *, int);
int      rcmdsh(char **, int, const char *,
            const char *, const char *, char *);
int      reboot(int);
int      revoke(const char *);
int      rresvport(int *);
int      rresvport_af(int *, int);
int      ruserok(const char *, int, const char *, const char *);
int      setdomainname(const char *, size_t);
int      setgroups(int, const gid_t *);
int      sethostid(long);
int      sethostname(const char *, size_t);
int      setlogin(const char *);
void    *setmode(const char *);
int      setpgrp(pid_t _pid, pid_t _pgrp);      /* BSD compat version */
int      setthrname(pid_t, const char *);
void     setusershell(void);
int      strtofflags(char **, u_int32_t *, u_int32_t *);
int      swapctl(int, const void *, int);
int      pledge(const char *, const char *);
int      unveil(const char *, const char *);
pid_t    __tfork_thread(const struct __tfork *, size_t, void (*)(void *),
            void *);
#endif /* __BSD_VISIBLE */
__END_DECLS

#endif /* !_UNISTD_H_ */