include/unistd.h

   1 /*-
   2  * Copyright (c) 1991, 1993, 1994
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. All advertising materials mentioning features or use of this software
  14  *    must display the following acknowledgement:
  15  *      This product includes software developed by the University of
  16  *      California, Berkeley and its contributors.
  17  * 4. Neither the name of the University nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  *
  33  *      @(#)unistd.h    8.12 (Berkeley) 4/27/95
  34  * $FreeBSD: src/include/unistd.h,v 1.93 2009/03/14 19:11:08 das Exp $
  35  */
  36
  37 #ifndef _UNISTD_H_
  38 #define _UNISTD_H_
  39
  40 #include <sys/cdefs.h>
  41 #include <sys/types.h>                  /* XXX adds too much pollution. */
  42 #include <sys/unistd.h>
  43 #include <sys/_null.h>
  44
  45 #ifndef _GID_T_DECLARED
  46 typedef __gid_t         gid_t;
  47 #define _GID_T_DECLARED
  48 #endif
  49
  50 #ifndef _OFF_T_DECLARED
  51 typedef __off_t         off_t;
  52 #define _OFF_T_DECLARED
  53 #endif
  54
  55 #ifndef _PID_T_DECLARED
  56 typedef __pid_t         pid_t;
  57 #define _PID_T_DECLARED
  58 #endif
  59
  60 #ifndef _SIZE_T_DECLARED
  61 typedef __size_t        size_t;
  62 #define _SIZE_T_DECLARED
  63 #endif
  64
  65 #ifndef _SSIZE_T_DECLARED
  66 typedef __ssize_t       ssize_t;
  67 #define _SSIZE_T_DECLARED
  68 #endif
  69
  70 #ifndef _UID_T_DECLARED
  71 typedef __uid_t         uid_t;
  72 #define _UID_T_DECLARED
  73 #endif
  74
  75 #define  STDIN_FILENO   0       /* standard input file descriptor */
  76 #define STDOUT_FILENO   1       /* standard output file descriptor */
  77 #define STDERR_FILENO   2       /* standard error file descriptor */
  78
  79 #if __XSI_VISIBLE || __POSIX_VISIBLE >= 200112
  80 #define F_ULOCK         0       /* unlock locked section */
  81 #define F_LOCK          1       /* lock a section for exclusive use */
  82 #define F_TLOCK         2       /* test and lock a section for exclusive use */
  83 #define F_TEST          3       /* test a section for locks by other procs */
  84 #endif
  85
  86 /*
  87  * POSIX options and option groups we unconditionally do or don't
  88  * implement.  This list includes those options which are exclusively
  89  * implemented (or not) in user mode.  Please keep this list in
  90  * alphabetical order.
  91  *
  92  * Anything which is defined as zero below **must** have an
  93  * implementation for the corresponding sysconf() which is able to
  94  * determine conclusively whether or not the feature is supported.
  95  * Anything which is defined as other than -1 below **must** have
  96  * complete headers, types, and function declarations as specified by
  97  * the POSIX standard; however, if the relevant sysconf() function
  98  * returns -1, the functions may be stubbed out.
  99  */
 100 #define _POSIX_READER_WRITER_LOCKS      200112L
 101 #define _POSIX_REGEXP                   1
 102 #define _POSIX_SHELL                    1
 103 #define _POSIX_SPAWN                    200112L
 104 #define _POSIX_THREAD_ATTR_STACKADDR    200112L
 105 #define _POSIX_THREAD_ATTR_STACKSIZE    200112L
 106 #define _POSIX_THREAD_CPUTIME           -1
 107 #define _POSIX_THREAD_PRIO_INHERIT      200112L
 108 #define _POSIX_THREAD_PRIO_PROTECT      200112L
 109 #define _POSIX_THREAD_PRIORITY_SCHEDULING 200112L
 110 #define _POSIX_THREAD_PROCESS_SHARED    -1
 111 #define _POSIX_THREAD_SAFE_FUNCTIONS    -1
 112 #define _POSIX_THREAD_SPORADIC_SERVER   -1
 113 #define _POSIX_THREADS                  200112L
 114 #define _POSIX_TRACE                    -1
 115 #define _POSIX_TRACE_EVENT_FILTER       -1
 116 #define _POSIX_TRACE_INHERIT            -1
 117 #define _POSIX_TRACE_LOG                -1
 118 #define _POSIX2_C_BIND                  200112L /* mandatory */
 119 #define _POSIX2_C_DEV                   -1 /* need c99 utility */
 120 #define _POSIX2_CHAR_TERM               1
 121 #define _POSIX2_FORT_DEV                -1 /* need fort77 utility */
 122 #define _POSIX2_FORT_RUN                200112L
 123 #define _POSIX2_LOCALEDEF               -1
 124 #define _POSIX2_PBS                     -1
 125 #define _POSIX2_PBS_ACCOUNTING          -1
 126 #define _POSIX2_PBS_CHECKPOINT          -1
 127 #define _POSIX2_PBS_LOCATE              -1
 128 #define _POSIX2_PBS_MESSAGE             -1
 129 #define _POSIX2_PBS_TRACK               -1
 130 #define _POSIX2_SW_DEV                  -1 /* XXX ??? */
 131 #define _POSIX2_UPE                     200112L
 132 #define _V6_ILP32_OFF32                 -1
 133 #define _V6_ILP32_OFFBIG                0
 134 #define _V6_LP64_OFF64                  0
 135 #define _V6_LPBIG_OFFBIG                -1
 136
 137 #if __XSI_VISIBLE
 138 #define _XOPEN_CRYPT                    -1 /* XXX ??? */
 139 #define _XOPEN_ENH_I18N                 -1 /* mandatory in XSI */
 140 #define _XOPEN_LEGACY                   -1
 141 #define _XOPEN_REALTIME                 -1
 142 #define _XOPEN_REALTIME_THREADS         -1
 143 #define _XOPEN_UNIX                     -1
 144 #endif
 145
 146 /* Define the POSIX.2 version we target for compliance. */
 147 #define _POSIX2_VERSION         199212L
 148
 149 /*
 150  * POSIX-style system configuration variable accessors (for the
 151  * sysconf function).  The kernel does not directly implement the
 152  * sysconf() interface; rather, a C library stub translates references
 153  * to sysconf() into calls to sysctl() using a giant switch statement.
 154  * Those that are marked `user' are implemented entirely in the C
 155  * library and never query the kernel.  pathconf() is implemented
 156  * directly by the kernel so those are not defined here.
 157  */
 158 #define _SC_ARG_MAX              1
 159 #define _SC_CHILD_MAX            2
 160 #define _SC_CLK_TCK              3
 161 #define _SC_NGROUPS_MAX          4
 162 #define _SC_OPEN_MAX             5
 163 #define _SC_JOB_CONTROL          6
 164 #define _SC_SAVED_IDS            7
 165 #define _SC_VERSION              8
 166 #define _SC_BC_BASE_MAX          9 /* user */
 167 #define _SC_BC_DIM_MAX          10 /* user */
 168 #define _SC_BC_SCALE_MAX        11 /* user */
 169 #define _SC_BC_STRING_MAX       12 /* user */
 170 #define _SC_COLL_WEIGHTS_MAX    13 /* user */
 171 #define _SC_EXPR_NEST_MAX       14 /* user */
 172 #define _SC_LINE_MAX            15 /* user */
 173 #define _SC_RE_DUP_MAX          16 /* user */
 174 #define _SC_2_VERSION           17 /* user */
 175 #define _SC_2_C_BIND            18 /* user */
 176 #define _SC_2_C_DEV             19 /* user */
 177 #define _SC_2_CHAR_TERM         20 /* user */
 178 #define _SC_2_FORT_DEV          21 /* user */
 179 #define _SC_2_FORT_RUN          22 /* user */
 180 #define _SC_2_LOCALEDEF         23 /* user */
 181 #define _SC_2_SW_DEV            24 /* user */
 182 #define _SC_2_UPE               25 /* user */
 183 #define _SC_STREAM_MAX          26 /* user */
 184 #define _SC_TZNAME_MAX          27 /* user */
 185
 186 #if __POSIX_VISIBLE >= 199309
 187 #define _SC_ASYNCHRONOUS_IO     28
 188 #define _SC_MAPPED_FILES        29
 189 #define _SC_MEMLOCK             30
 190 #define _SC_MEMLOCK_RANGE       31
 191 #define _SC_MEMORY_PROTECTION   32
 192 #define _SC_MESSAGE_PASSING     33
 193 #define _SC_PRIORITIZED_IO      34
 194 #define _SC_PRIORITY_SCHEDULING 35
 195 #define _SC_REALTIME_SIGNALS    36
 196 #define _SC_SEMAPHORES          37
 197 #define _SC_FSYNC               38
 198 #define _SC_SHARED_MEMORY_OBJECTS 39
 199 #define _SC_SYNCHRONIZED_IO     40
 200 #define _SC_TIMERS              41
 201 #define _SC_AIO_LISTIO_MAX      42
 202 #define _SC_AIO_MAX             43
 203 #define _SC_AIO_PRIO_DELTA_MAX  44
 204 #define _SC_DELAYTIMER_MAX      45
 205 #define _SC_MQ_OPEN_MAX         46
 206 #define _SC_PAGESIZE            47
 207 #define _SC_RTSIG_MAX           48
 208 #define _SC_SEM_NSEMS_MAX       49
 209 #define _SC_SEM_VALUE_MAX       50
 210 #define _SC_SIGQUEUE_MAX        51
 211 #define _SC_TIMER_MAX           52
 212 #endif
 213
 214 #if __POSIX_VISIBLE >= 200112
 215 #define _SC_2_PBS               59 /* user */
 216 #define _SC_2_PBS_ACCOUNTING    60 /* user */
 217 #define _SC_2_PBS_CHECKPOINT    61 /* user */
 218 #define _SC_2_PBS_LOCATE        62 /* user */
 219 #define _SC_2_PBS_MESSAGE       63 /* user */
 220 #define _SC_2_PBS_TRACK         64 /* user */
 221 #define _SC_ADVISORY_INFO       65
 222 #define _SC_BARRIERS            66 /* user */
 223 #define _SC_CLOCK_SELECTION     67
 224 #define _SC_CPUTIME             68
 225 #define _SC_FILE_LOCKING        69
 226 #define _SC_GETGR_R_SIZE_MAX    70 /* user */
 227 #define _SC_GETPW_R_SIZE_MAX    71 /* user */
 228 #define _SC_HOST_NAME_MAX       72
 229 #define _SC_LOGIN_NAME_MAX      73
 230 #define _SC_MONOTONIC_CLOCK     74
 231 #define _SC_MQ_PRIO_MAX         75
 232 #define _SC_READER_WRITER_LOCKS 76 /* user */
 233 #define _SC_REGEXP              77 /* user */
 234 #define _SC_SHELL               78 /* user */
 235 #define _SC_SPAWN               79 /* user */
 236 #define _SC_SPIN_LOCKS          80 /* user */
 237 #define _SC_SPORADIC_SERVER     81
 238 #define _SC_THREAD_ATTR_STACKADDR 82 /* user */
 239 #define _SC_THREAD_ATTR_STACKSIZE 83 /* user */
 240 #define _SC_THREAD_CPUTIME      84 /* user */
 241 #define _SC_THREAD_DESTRUCTOR_ITERATIONS 85 /* user */
 242 #define _SC_THREAD_KEYS_MAX     86 /* user */
 243 #define _SC_THREAD_PRIO_INHERIT 87 /* user */
 244 #define _SC_THREAD_PRIO_PROTECT 88 /* user */
 245 #define _SC_THREAD_PRIORITY_SCHEDULING 89 /* user */
 246 #define _SC_THREAD_PROCESS_SHARED 90 /* user */
 247 #define _SC_THREAD_SAFE_FUNCTIONS 91 /* user */
 248 #define _SC_THREAD_SPORADIC_SERVER 92 /* user */
 249 #define _SC_THREAD_STACK_MIN    93 /* user */
 250 #define _SC_THREAD_THREADS_MAX  94 /* user */
 251 #define _SC_TIMEOUTS            95 /* user */
 252 #define _SC_THREADS             96 /* user */
 253 #define _SC_TRACE               97 /* user */
 254 #define _SC_TRACE_EVENT_FILTER  98 /* user */
 255 #define _SC_TRACE_INHERIT       99 /* user */
 256 #define _SC_TRACE_LOG           100 /* user */
 257 #define _SC_TTY_NAME_MAX        101 /* user */
 258 #define _SC_TYPED_MEMORY_OBJECTS 102
 259 #define _SC_V6_ILP32_OFF32      103 /* user */
 260 #define _SC_V6_ILP32_OFFBIG     104 /* user */
 261 #define _SC_V6_LP64_OFF64       105 /* user */
 262 #define _SC_V6_LPBIG_OFFBIG     106 /* user */
 263 #define _SC_IPV6                118
 264 #define _SC_RAW_SOCKETS         119
 265 #define _SC_SYMLOOP_MAX         120
 266 #endif
 267
 268 #if __XSI_VISIBLE
 269 #define _SC_ATEXIT_MAX          107 /* user */
 270 #define _SC_IOV_MAX             56
 271 #define _SC_PAGE_SIZE           _SC_PAGESIZE
 272 #define _SC_XOPEN_CRYPT         108 /* user */
 273 #define _SC_XOPEN_ENH_I18N      109 /* user */
 274 #define _SC_XOPEN_LEGACY        110 /* user */
 275 #define _SC_XOPEN_REALTIME      111
 276 #define _SC_XOPEN_REALTIME_THREADS 112
 277 #define _SC_XOPEN_SHM           113
 278 #define _SC_XOPEN_STREAMS       114
 279 #define _SC_XOPEN_UNIX          115
 280 #define _SC_XOPEN_VERSION       116
 281 #define _SC_XOPEN_XCU_VERSION   117 /* user */
 282 #endif
 283
 284 #if __BSD_VISIBLE
 285 #define _SC_NPROCESSORS_CONF    57
 286 #define _SC_NPROCESSORS_ONLN    58
 287 #endif
 288
 289 /* Extensions found in Solaris and Linux. */
 290 #define _SC_PHYS_PAGES          121
 291
 292 /* Keys for the confstr(3) function. */
 293 #if __POSIX_VISIBLE >= 199209
 294 #define _CS_PATH                1       /* default value of PATH */
 295 #endif
 296
 297 #if __POSIX_VISIBLE >= 200112
 298 #define _CS_POSIX_V6_ILP32_OFF32_CFLAGS         2
 299 #define _CS_POSIX_V6_ILP32_OFF32_LDFLAGS        3
 300 #define _CS_POSIX_V6_ILP32_OFF32_LIBS           4
 301 #define _CS_POSIX_V6_ILP32_OFFBIG_CFLAGS        5
 302 #define _CS_POSIX_V6_ILP32_OFFBIG_LDFLAGS       6
 303 #define _CS_POSIX_V6_ILP32_OFFBIG_LIBS          7
 304 #define _CS_POSIX_V6_LP64_OFF64_CFLAGS          8
 305 #define _CS_POSIX_V6_LP64_OFF64_LDFLAGS         9
 306 #define _CS_POSIX_V6_LP64_OFF64_LIBS            10
 307 #define _CS_POSIX_V6_LPBIG_OFFBIG_CFLAGS        11
 308 #define _CS_POSIX_V6_LPBIG_OFFBIG_LDFLAGS       12
 309 #define _CS_POSIX_V6_LPBIG_OFFBIG_LIBS          13
 310 #define _CS_POSIX_V6_WIDTH_RESTRICTED_ENVS      14
 311 #endif
 312
 313 __BEGIN_DECLS
 314 /* 1003.1-1990 */
 315 void     _exit(int) __dead2;
 316 int      access(const char *, int);
 317 unsigned int     alarm(unsigned int);
 318 int      chdir(const char *);
 319 int      chown(const char *, uid_t, gid_t);
 320 int      close(int);
 321 int      dup(int);
 322 int      dup2(int, int);
 323 #if __BSD_VISIBLE
 324 int      eaccess(const char *, int);
 325 #endif
 326 int      execl(const char *, const char *, ...);
 327 int      execle(const char *, const char *, ...);
 328 int      execlp(const char *, const char *, ...);
 329 int      execv(const char *, char * const *);
 330 int      execve(const char *, char * const *, char * const *);
 331 int      execvp(const char *, char * const *);
 332 pid_t    fork(void);
 333 long     fpathconf(int, int);
 334 char    *getcwd(char *, size_t);
 335 gid_t    getegid(void);
 336 uid_t    geteuid(void);
 337 gid_t    getgid(void);
 338 int      getgroups(int, gid_t []);
 339 char    *getlogin(void);
 340 pid_t    getpgrp(void);
 341 pid_t    getpid(void);
 342 pid_t    getppid(void);
 343 uid_t    getuid(void);
 344 int      isatty(int);
 345 int      link(const char *, const char *);
 346 #ifndef _LSEEK_DECLARED
 347 #define _LSEEK_DECLARED
 348 off_t    lseek(int, off_t, int);
 349 #endif
 350 long     pathconf(const char *, int);
 351 int      pause(void);
 352 int      pipe(int *);
 353 int      pipe2(int *, int);
 354 ssize_t  read(int, void *, size_t);
 355 int      rmdir(const char *);
 356 int      setgid(gid_t);
 357 int      setpgid(pid_t, pid_t);
 358 pid_t    setsid(void);
 359 int      setuid(uid_t);
 360 unsigned int     sleep(unsigned int);
 361 long     sysconf(int);
 362 pid_t    tcgetpgrp(int);
 363 int      tcsetpgrp(int, pid_t);
 364 char    *ttyname(int);
 365 int      ttyname_r(int, char *, size_t);
 366 int      unlink(const char *);
 367 ssize_t  write(int, const void *, size_t);
 368
 369 /* 1003.2-1992 */
 370 #if __POSIX_VISIBLE >= 199209 || __XSI_VISIBLE
 371 size_t   confstr(int, char *, size_t);
 372 #ifndef _GETOPT_DECLARED
 373 #define _GETOPT_DECLARED
 374 int      getopt(int, char * const [], const char *);
 375
 376 extern char *optarg;                    /* getopt(3) external variables */
 377 extern int optind, opterr, optopt;
 378 #endif /* _GETOPT_DECLARED */
 379 #endif
 380
 381 /* ISO/IEC 9945-1: 1996 */
 382 #if __POSIX_VISIBLE >= 199506 || __XSI_VISIBLE
 383 int      fsync(int);
 384
 385 /*
 386  * ftruncate() was in the POSIX Realtime Extension (it's used for shared
 387  * memory), but truncate() was not.
 388  */
 389 #ifndef _FTRUNCATE_DECLARED
 390 #define _FTRUNCATE_DECLARED
 391 int      ftruncate(int, off_t);
 392 #endif
 393 #endif
 394
 395 #if __POSIX_VISIBLE >= 199506
 396 int      getlogin_r(char *, int);
 397 #endif
 398
 399 /* 1003.1-2001 */
 400 #if __POSIX_VISIBLE >= 200112 || __XSI_VISIBLE
 401 int      fchown(int, uid_t, gid_t);
 402 ssize_t  readlink(const char * __restrict, char * __restrict, size_t);
 403 #endif
 404 #if __POSIX_VISIBLE >= 200112
 405 int      gethostname(char *, size_t);
 406 int      setegid(gid_t);
 407 int      seteuid(uid_t);
 408 #endif
 409
 410 /* 1003.1-2008 */
 411 #if __POSIX_VISIBLE >= 200809 || __XSI_VISIBLE
 412 int      getsid(pid_t _pid);
 413 int      fchdir(int);
 414 int      getpgid(pid_t _pid);
 415 int      lchown(const char *, uid_t, gid_t);
 416 ssize_t  pread(int, void *, size_t, off_t);
 417 ssize_t  pwrite(int, const void *, size_t, off_t);
 418
 419 /* See comment at ftruncate() above. */
 420 #ifndef _TRUNCATE_DECLARED
 421 #define _TRUNCATE_DECLARED
 422 int      truncate(const char *, off_t);
 423 #endif
 424 #endif /* __POSIX_VISIBLE >= 200809 || __XSI_VISIBLE */
 425
 426 #if __POSIX_VISIBLE >= 200809
 427 int     faccessat(int, const char *, int, int);
 428 int     fchownat(int, const char *, uid_t, gid_t, int);
 429 #if 0
 430 int     fexecve(int, char *const [], char *const []);
 431 #endif
 432 int     linkat(int, const char *, int, const char *, int);
 433 ssize_t readlinkat(int, const char * __restrict, char * __restrict, size_t);
 434 int     symlinkat(const char *, int, const char *);
 435 int     unlinkat(int, const char *, int);
 436 #endif /* __POSIX_VISIBLE >= 200809 */
 437
 438 /*
 439  * symlink() was originally in POSIX.1a, which was withdrawn after
 440  * being overtaken by events (1003.1-2001).  It was in XPG4.2, and of
 441  * course has been in BSD since 4.2.
 442  */
 443 #if __POSIX_VISIBLE >= 200112 || __XSI_VISIBLE >= 402
 444 int      symlink(const char * __restrict, const char * __restrict);
 445 #endif
 446
 447 /* X/Open System Interfaces */
 448 #if __XSI_VISIBLE
 449 char    *crypt(const char *, const char *);
 450 /* char *ctermid(char *); */            /* XXX ??? */
 451 int      encrypt(char *, int);
 452 long     gethostid(void);
 453 int      lockf(int, int, off_t);
 454 int      nice(int);
 455 int      setpgrp(pid_t _pid, pid_t _pgrp); /* obsoleted by setpgid() */
 456 int      setregid(gid_t, gid_t);
 457 int      setreuid(uid_t, uid_t);
 458
 459 #ifndef _SWAB_DECLARED
 460 #define _SWAB_DECLARED
 461 void     swab(const void * __restrict, void * __restrict, ssize_t);
 462 #endif /* _SWAB_DECLARED */
 463
 464 void     sync(void);
 465
 466 #endif /* __XSI_VISIBLE */
 467
 468 #if (__XSI_VISIBLE && __XSI_VISIBLE <= 500) || __BSD_VISIBLE
 469 int      brk(const void *);
 470 int      chroot(const char *);
 471 int      chroot_kernel(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 *);                 /* LEGACY (obsoleted by getcwd()) */
 480 unsigned int
 481          ualarm(unsigned int, unsigned int);
 482 int      usleep(unsigned int);
 483 pid_t    vfork(void) __returns_twice;
 484 #endif
 485
 486 #if __BSD_VISIBLE
 487 struct iovec;
 488 int      acct(const char *);
 489 int      async_daemon(void);
 490 int      closefrom(int);
 491 const char *
 492          crypt_get_format(void);
 493 int      crypt_set_format(const char *);
 494 void     endusershell(void);
 495 int      exect(const char *, char * const *, char * const *);
 496 int      execvP(const char *, const char *, char * const *);
 497 void     extexit(int, int, void *);
 498 ssize_t  extpread(int, void *, size_t, int, off_t);
 499 ssize_t  extpreadv(int, const struct iovec *, u_int, int, off_t);
 500 ssize_t  extpwrite(int, const void *, size_t, int, off_t);
 501 ssize_t  extpwritev(int, const struct iovec *, u_int, int, off_t);
 502 char    *fflagstostr(u_long);
 503 int      getdomainname(char *, int);
 504 int      getgrouplist(const char *, gid_t, gid_t *, int *);
 505 mode_t   getmode(const void *, mode_t);
 506 int      getosreldate(void);
 507 int      getpeereid(int, uid_t *, gid_t *);
 508 int      getresgid(gid_t *, gid_t *, gid_t *);
 509 int      getresuid(uid_t *, uid_t *, uid_t *);
 510 char    *getusershell(void);
 511 int      initgroups(const char *, gid_t);
 512 int      iruserok(unsigned long, int, const char *, const char *);
 513 int      iruserok_sa(const void *, int, int, const char *, const char *);
 514 int      issetugid(void);
 515 long     lpathconf(const char *, int);
 516 int      lwp_create(struct lwp_params *);
 517 lwpid_t  lwp_gettid(void);
 518 #ifndef _MKDTEMP_DECLARED
 519 char    *mkdtemp(char *);
 520 #define _MKDTEMP_DECLARED
 521 #endif
 522 #ifndef _MKNOD_DECLARED
 523 int      mknod(const char *, mode_t, dev_t);
 524 #define _MKNOD_DECLARED
 525 #endif
 526 #ifndef _MKSTEMP_DECLARED
 527 int      mkstemp(char *);
 528 #define _MKSTEMP_DECLARED
 529 #endif
 530 int      mkstemps(char *, int);
 531 #ifndef _MKTEMP_DECLARED
 532 char    *mktemp(char *);
 533 #define _MKTEMP_DECLARED
 534 #endif
 535 int      nfssvc(int, void *);
 536 int      profil(char *, size_t, vm_offset_t, int);
 537 int      rcmd(char **, int, const char *, const char *, const char *, int *);
 538 int      rcmd_af(char **, int, const char *, const char *, const char *, int *,
 539                  int);
 540 int      rcmdsh(char **, int, const char *, const char *, const char *,
 541                 const char *);
 542 char    *re_comp(const char *);
 543 int      re_exec(const char *);
 544 int      reboot(int);
 545 int      revoke(const char *);
 546 pid_t    rfork(int);
 547 pid_t    rfork_thread(int, void *, int (*)(void *), void *);
 548 int      rresvport(int *);
 549 int      rresvport_af(int *, int);
 550 int      ruserok(const char *, int, const char *, const char *);
 551 int      setdomainname(const char *, int);
 552 int      setgroups(int, const gid_t *);
 553 void     sethostid(long);
 554 int      sethostname(const char *, int);
 555 int      setlogin(const char *);
 556 void    *setmode(const char *);
 557 void     setproctitle(const char *_fmt, ...) __printf0like(1, 2);
 558 int      setresgid(gid_t, gid_t, gid_t);
 559 int      setresuid(uid_t, uid_t, uid_t);
 560 int      setrgid(gid_t);
 561 int      setruid(uid_t);
 562 void     setusershell(void);
 563 int      strtofflags(char **, u_long *, u_long *);
 564 int      swapoff(const char *);
 565 int      swapon(const char *);
 566 int      syscall(int, ...);
 567 off_t    __syscall(quad_t, ...);
 568 int      ttyslot(void);
 569 int      umtx_sleep(volatile const int *, int , int);
 570 int      umtx_wakeup(volatile const int *, int);
 571 int      undelete(const char *);
 572 int      unwhiteout(const char *);
 573 void    *valloc(size_t);                        /* obsoleted by malloc() */
 574 int      varsym_get(int, const char *, char *, int);
 575 int      varsym_list(int, char *, int, int *);
 576 int      varsym_set(int, const char *, const char *);
 577
 578 #ifndef _OPTRESET_DECLARED
 579 #define _OPTRESET_DECLARED
 580 extern int optreset;                    /* getopt(3) external variable */
 581 #endif
 582 #endif /* __BSD_VISIBLE */
 583 __END_DECLS
 584
 585 #endif /* !_UNISTD_H_ */