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. Neither the name of the University nor the names of its contributors
  14  *    may be used to endorse or promote products derived from this software
  15  *    without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  *
  29  *      @(#)unistd.h    8.12 (Berkeley) 4/27/95
  30  * $FreeBSD: src/include/unistd.h,v 1.93 2009/03/14 19:11:08 das Exp $
  31  */
  32
  33 #ifndef _UNISTD_H_
  34 #define _UNISTD_H_
  35
  36 #include <sys/cdefs.h>
  37 #include <sys/types.h>                  /* XXX adds too much pollution. */
  38 #include <sys/unistd.h>
  39 #include <sys/_null.h>
  40
  41 #ifndef _GID_T_DECLARED
  42 typedef __uint32_t      gid_t;          /* XXX __gid_t */
  43 #define _GID_T_DECLARED
  44 #endif
  45
  46 #ifndef _OFF_T_DECLARED
  47 typedef __off_t         off_t;
  48 #define _OFF_T_DECLARED
  49 #endif
  50
  51 #ifndef _PID_T_DECLARED
  52 typedef __pid_t         pid_t;
  53 #define _PID_T_DECLARED
  54 #endif
  55
  56 #ifndef _SIZE_T_DECLARED
  57 typedef __size_t        size_t;         /* _GCC_SIZE_T OK */
  58 #define _SIZE_T_DECLARED
  59 #endif
  60
  61 #ifndef _SSIZE_T_DECLARED
  62 typedef __ssize_t       ssize_t;
  63 #define _SSIZE_T_DECLARED
  64 #endif
  65
  66 #ifndef _UID_T_DECLARED
  67 typedef __uint32_t      uid_t;          /* XXX __uid_t */
  68 #define _UID_T_DECLARED
  69 #endif
  70
  71 #define  STDIN_FILENO   0       /* standard input file descriptor */
  72 #define STDOUT_FILENO   1       /* standard output file descriptor */
  73 #define STDERR_FILENO   2       /* standard error file descriptor */
  74
  75 #if __XSI_VISIBLE || __POSIX_VISIBLE >= 200112
  76 #define F_ULOCK         0       /* unlock locked section */
  77 #define F_LOCK          1       /* lock a section for exclusive use */
  78 #define F_TLOCK         2       /* test and lock a section for exclusive use */
  79 #define F_TEST          3       /* test a section for locks by other procs */
  80 #endif
  81
  82 /*
  83  * Extended API support (DragonFly specific)
  84  */
  85 #if __BSD_VISIBLE
  86
  87 #define _HAVE_EXTEXIT           1
  88 #define _HAVE_EXTPREAD          1
  89 #define _HAVE_EXTPREADV         1
  90 #define _HAVE_EXTPWRITE         1
  91 #define _HAVE_EXTPWRITEV        1
  92
  93 #endif
  94
  95 /*
  96  * POSIX options and option groups we unconditionally do or don't
  97  * implement.  This list includes those options which are exclusively
  98  * implemented (or not) in user mode.  Please keep this list in
  99  * alphabetical order.
 100  *
 101  * Anything which is defined as zero below **must** have an
 102  * implementation for the corresponding sysconf() which is able to
 103  * determine conclusively whether or not the feature is supported.
 104  * Anything which is defined as other than -1 below **must** have
 105  * complete headers, types, and function declarations as specified by
 106  * the POSIX standard; however, if the relevant sysconf() function
 107  * returns -1, the functions may be stubbed out.
 108  */
 109 #define _POSIX_READER_WRITER_LOCKS      200112L
 110 #define _POSIX_REGEXP                   1       /* mandatory */
 111 #define _POSIX_SHELL                    1       /* mandatory */
 112 #define _POSIX_SPAWN                    200112L /* [SPN] */
 113 #define _POSIX_THREAD_ATTR_STACKADDR    200112L /* [TSA] */
 114 #define _POSIX_THREAD_ATTR_STACKSIZE    200112L /* [TSS] */
 115 #define _POSIX_THREAD_PRIO_INHERIT      200112L /* [TPI] */
 116 #define _POSIX_THREAD_PRIO_PROTECT      200112L /* [TPP] */
 117 #define _POSIX_THREAD_PRIORITY_SCHEDULING 200112L /* [TPS] */
 118 #define _POSIX_THREAD_PROCESS_SHARED    -1      /* [TSH] */
 119 #define _POSIX_THREAD_ROBUST_PRIO_INHERIT -1    /* [RPI] */
 120 #define _POSIX_THREAD_ROBUST_PRIO_PROTECT -1    /* [RPP] */
 121 #define _POSIX_THREAD_SAFE_FUNCTIONS    -1
 122 #define _POSIX_THREAD_SPORADIC_SERVER   -1      /* [TSP] */
 123 #define _POSIX_THREADS                  200112L
 124 #define _POSIX_TRACE                    -1      /* [TRC] obsolescent */
 125 #define _POSIX_TRACE_EVENT_FILTER       -1      /* [TEF] obsolescent */
 126 #define _POSIX_TRACE_INHERIT            -1      /* [TRI] obsolescent */
 127 #define _POSIX_TRACE_LOG                -1      /* [TRL] obsolescent */
 128
 129 #define _POSIX2_C_BIND                  200809L /* mandatory */
 130 #define _POSIX2_C_DEV                   200809L /* [CD] */
 131 #define _POSIX2_CHAR_TERM               1
 132 #define _POSIX2_FORT_DEV                -1      /* [FD] need fort77 utility */
 133 #define _POSIX2_FORT_RUN                200809L /* [FR] */
 134 #define _POSIX2_LOCALEDEF               200809L
 135 #define _POSIX2_PBS                     -1      /* [BE] obsolescent */
 136 #define _POSIX2_PBS_ACCOUNTING          -1      /* [BE] obsolescent */
 137 #define _POSIX2_PBS_CHECKPOINT          -1      /* [BE] obsolescent */
 138 #define _POSIX2_PBS_LOCATE              -1      /* [BE] obsolescent */
 139 #define _POSIX2_PBS_MESSAGE             -1      /* [BE] obsolescent */
 140 #define _POSIX2_PBS_TRACK               -1      /* [BE] obsolescent */
 141 #define _POSIX2_SW_DEV                  200809L /* [SD] */
 142 #define _POSIX2_UPE                     200809L /* [UP] */
 143
 144 #define _V6_ILP32_OFF32                 -1
 145 #define _V6_ILP32_OFFBIG                0
 146 #define _V6_LP64_OFF64                  0
 147 #define _V6_LPBIG_OFFBIG                -1
 148
 149 #define _V7_ILP32_OFF32                 -1
 150 #define _V7_ILP32_OFFBIG                0
 151 #define _V7_LP64_OFF64                  0
 152 #define _V7_LPBIG_OFFBIG                -1
 153
 154 #if __XSI_VISIBLE
 155 #define _XOPEN_CRYPT                    -1 /* XXX ??? */
 156 #define _XOPEN_ENH_I18N                 -1 /* mandatory in XSI */
 157 #define _XOPEN_LEGACY                   -1
 158 #define _XOPEN_REALTIME                 -1
 159 #define _XOPEN_REALTIME_THREADS         -1
 160 #define _XOPEN_UNIX                     -1
 161 #endif
 162
 163 /* Define the POSIX.2 version we target for compliance. */
 164 #define _POSIX2_VERSION         199212L
 165
 166 /*
 167  * POSIX-style system configuration variable accessors (for the
 168  * sysconf function).  The kernel does not directly implement the
 169  * sysconf() interface; rather, a C library stub translates references
 170  * to sysconf() into calls to sysctl() using a giant switch statement.
 171  * Those that are marked `user' are implemented entirely in the C
 172  * library and never query the kernel.  pathconf() is implemented
 173  * directly by the kernel so those are not defined here.
 174  */
 175 #define _SC_ARG_MAX              1
 176 #define _SC_CHILD_MAX            2
 177 #define _SC_CLK_TCK              3
 178 #define _SC_NGROUPS_MAX          4
 179 #define _SC_OPEN_MAX             5
 180 #define _SC_JOB_CONTROL          6
 181 #define _SC_SAVED_IDS            7
 182 #define _SC_VERSION              8
 183 #define _SC_BC_BASE_MAX          9 /* user */
 184 #define _SC_BC_DIM_MAX          10 /* user */
 185 #define _SC_BC_SCALE_MAX        11 /* user */
 186 #define _SC_BC_STRING_MAX       12 /* user */
 187 #define _SC_COLL_WEIGHTS_MAX    13 /* user */
 188 #define _SC_EXPR_NEST_MAX       14 /* user */
 189 #define _SC_LINE_MAX            15 /* user */
 190 #define _SC_RE_DUP_MAX          16 /* user */
 191 #define _SC_2_VERSION           17 /* user */
 192 #define _SC_2_C_BIND            18 /* user */
 193 #define _SC_2_C_DEV             19 /* user */
 194 #define _SC_2_CHAR_TERM         20 /* user */
 195 #define _SC_2_FORT_DEV          21 /* user */
 196 #define _SC_2_FORT_RUN          22 /* user */
 197 #define _SC_2_LOCALEDEF         23 /* user */
 198 #define _SC_2_SW_DEV            24 /* user */
 199 #define _SC_2_UPE               25 /* user */
 200 #define _SC_STREAM_MAX          26 /* user */
 201 #define _SC_TZNAME_MAX          27 /* user */
 202
 203 #if __POSIX_VISIBLE >= 199309
 204 #define _SC_ASYNCHRONOUS_IO     28
 205 #define _SC_MAPPED_FILES        29
 206 #define _SC_MEMLOCK             30
 207 #define _SC_MEMLOCK_RANGE       31
 208 #define _SC_MEMORY_PROTECTION   32
 209 #define _SC_MESSAGE_PASSING     33
 210 #define _SC_PRIORITIZED_IO      34
 211 #define _SC_PRIORITY_SCHEDULING 35
 212 #define _SC_REALTIME_SIGNALS    36
 213 #define _SC_SEMAPHORES          37
 214 #define _SC_FSYNC               38
 215 #define _SC_SHARED_MEMORY_OBJECTS 39
 216 #define _SC_SYNCHRONIZED_IO     40
 217 #define _SC_TIMERS              41
 218 #define _SC_AIO_LISTIO_MAX      42
 219 #define _SC_AIO_MAX             43
 220 #define _SC_AIO_PRIO_DELTA_MAX  44
 221 #define _SC_DELAYTIMER_MAX      45
 222 #define _SC_MQ_OPEN_MAX         46
 223 #define _SC_PAGESIZE            47
 224 #define _SC_RTSIG_MAX           48
 225 #define _SC_SEM_NSEMS_MAX       49
 226 #define _SC_SEM_VALUE_MAX       50
 227 #define _SC_SIGQUEUE_MAX        51
 228 #define _SC_TIMER_MAX           52
 229 #endif
 230
 231 #if __POSIX_VISIBLE >= 200112
 232 #define _SC_2_PBS               59 /* user */
 233 #define _SC_2_PBS_ACCOUNTING    60 /* user */
 234 #define _SC_2_PBS_CHECKPOINT    61 /* user */
 235 #define _SC_2_PBS_LOCATE        62 /* user */
 236 #define _SC_2_PBS_MESSAGE       63 /* user */
 237 #define _SC_2_PBS_TRACK         64 /* user */
 238 #define _SC_ADVISORY_INFO       65
 239 #define _SC_BARRIERS            66 /* user */
 240 #define _SC_CLOCK_SELECTION     67
 241 #define _SC_CPUTIME             68
 242 #define _SC_FILE_LOCKING        69
 243 #define _SC_GETGR_R_SIZE_MAX    70 /* user */
 244 #define _SC_GETPW_R_SIZE_MAX    71 /* user */
 245 #define _SC_HOST_NAME_MAX       72
 246 #define _SC_LOGIN_NAME_MAX      73
 247 #define _SC_MONOTONIC_CLOCK     74
 248 #define _SC_MQ_PRIO_MAX         75
 249 #define _SC_READER_WRITER_LOCKS 76 /* user */
 250 #define _SC_REGEXP              77 /* user */
 251 #define _SC_SHELL               78 /* user */
 252 #define _SC_SPAWN               79 /* user */
 253 #define _SC_SPIN_LOCKS          80 /* user */
 254 #define _SC_SPORADIC_SERVER     81
 255 #define _SC_THREAD_ATTR_STACKADDR 82 /* user */
 256 #define _SC_THREAD_ATTR_STACKSIZE 83 /* user */
 257 #define _SC_THREAD_CPUTIME      84 /* user */
 258 #define _SC_THREAD_DESTRUCTOR_ITERATIONS 85 /* user */
 259 #define _SC_THREAD_KEYS_MAX     86 /* user */
 260 #define _SC_THREAD_PRIO_INHERIT 87 /* user */
 261 #define _SC_THREAD_PRIO_PROTECT 88 /* user */
 262 #define _SC_THREAD_PRIORITY_SCHEDULING 89 /* user */
 263 #define _SC_THREAD_PROCESS_SHARED 90 /* user */
 264 #define _SC_THREAD_SAFE_FUNCTIONS 91 /* user */
 265 #define _SC_THREAD_SPORADIC_SERVER 92 /* user */
 266 #define _SC_THREAD_STACK_MIN    93 /* user */
 267 #define _SC_THREAD_THREADS_MAX  94 /* user */
 268 #define _SC_TIMEOUTS            95 /* user */
 269 #define _SC_THREADS             96 /* user */
 270 #define _SC_TRACE               97 /* user */
 271 #define _SC_TRACE_EVENT_FILTER  98 /* user */
 272 #define _SC_TRACE_INHERIT       99 /* user */
 273 #define _SC_TRACE_LOG           100 /* user */
 274 #define _SC_TTY_NAME_MAX        101 /* user */
 275 #define _SC_TYPED_MEMORY_OBJECTS 102
 276 #define _SC_V6_ILP32_OFF32      103 /* user */
 277 #define _SC_V6_ILP32_OFFBIG     104 /* user */
 278 #define _SC_V6_LP64_OFF64       105 /* user */
 279 #define _SC_V6_LPBIG_OFFBIG     106 /* user */
 280 #define _SC_IPV6                118
 281 #define _SC_RAW_SOCKETS         119
 282 #define _SC_SYMLOOP_MAX         120
 283 #endif
 284
 285 #if __XSI_VISIBLE
 286 #define _SC_ATEXIT_MAX          107 /* user */
 287 #define _SC_IOV_MAX             56
 288 #define _SC_PAGE_SIZE           _SC_PAGESIZE
 289 #define _SC_XOPEN_CRYPT         108 /* user */
 290 #define _SC_XOPEN_ENH_I18N      109 /* user */
 291 #define _SC_XOPEN_LEGACY        110 /* user */
 292 #define _SC_XOPEN_REALTIME      111
 293 #define _SC_XOPEN_REALTIME_THREADS 112
 294 #define _SC_XOPEN_SHM           113
 295 #define _SC_XOPEN_STREAMS       114
 296 #define _SC_XOPEN_UNIX          115
 297 #define _SC_XOPEN_VERSION       116
 298 #define _SC_XOPEN_XCU_VERSION   117 /* user */
 299 #endif
 300
 301 #if __BSD_VISIBLE
 302 #define _SC_NPROCESSORS_CONF    57
 303 #define _SC_NPROCESSORS_ONLN    58
 304 #define _SC_LEVEL1_DCACHE_LINESIZE 128
 305 #endif
 306
 307 /* Extensions found in Solaris and Linux. */
 308 #define _SC_PHYS_PAGES          121
 309
 310 #if __POSIX_VISIBLE >= 200809
 311 #define _SC_V7_ILP32_OFF32      122 /* user */
 312 #define _SC_V7_ILP32_OFFBIG     123 /* user */
 313 #define _SC_V7_LP64_OFF64       124 /* user */
 314 #define _SC_V7_LPBIG_OFFBIG     125 /* user */
 315 #define _SC_THREAD_ROBUST_PRIO_INHERIT 126 /* user */
 316 #define _SC_THREAD_ROBUST_PRIO_PROTECT 127 /* user */
 317 #endif
 318
 319 /* Keys for the confstr(3) function. */
 320 #if __POSIX_VISIBLE >= 199209
 321 #define _CS_PATH                1       /* default value of PATH */
 322 #endif
 323
 324 #if __POSIX_VISIBLE >= 200112
 325 #define _CS_POSIX_V6_ILP32_OFF32_CFLAGS         2
 326 #define _CS_POSIX_V6_ILP32_OFF32_LDFLAGS        3
 327 #define _CS_POSIX_V6_ILP32_OFF32_LIBS           4
 328 #define _CS_POSIX_V6_ILP32_OFFBIG_CFLAGS        5
 329 #define _CS_POSIX_V6_ILP32_OFFBIG_LDFLAGS       6
 330 #define _CS_POSIX_V6_ILP32_OFFBIG_LIBS          7
 331 #define _CS_POSIX_V6_LP64_OFF64_CFLAGS          8
 332 #define _CS_POSIX_V6_LP64_OFF64_LDFLAGS         9
 333 #define _CS_POSIX_V6_LP64_OFF64_LIBS            10
 334 #define _CS_POSIX_V6_LPBIG_OFFBIG_CFLAGS        11
 335 #define _CS_POSIX_V6_LPBIG_OFFBIG_LDFLAGS       12
 336 #define _CS_POSIX_V6_LPBIG_OFFBIG_LIBS          13
 337 #define _CS_POSIX_V6_WIDTH_RESTRICTED_ENVS      14
 338 #endif
 339
 340 #if __POSIX_VISIBLE >= 200809
 341 #define _CS_POSIX_V7_ILP32_OFF32_CFLAGS         15
 342 #define _CS_POSIX_V7_ILP32_OFF32_LDFLAGS        16
 343 #define _CS_POSIX_V7_ILP32_OFF32_LIBS           17
 344 #define _CS_POSIX_V7_ILP32_OFFBIG_CFLAGS        18
 345 #define _CS_POSIX_V7_ILP32_OFFBIG_LDFLAGS       19
 346 #define _CS_POSIX_V7_ILP32_OFFBIG_LIBS          20
 347 #define _CS_POSIX_V7_LP64_OFF64_CFLAGS          21
 348 #define _CS_POSIX_V7_LP64_OFF64_LDFLAGS         22
 349 #define _CS_POSIX_V7_LP64_OFF64_LIBS            23
 350 #define _CS_POSIX_V7_LPBIG_OFFBIG_CFLAGS        24
 351 #define _CS_POSIX_V7_LPBIG_OFFBIG_LDFLAGS       25
 352 #define _CS_POSIX_V7_LPBIG_OFFBIG_LIBS          26
 353 #define _CS_POSIX_V7_WIDTH_RESTRICTED_ENVS      27
 354 #endif
 355
 356 __BEGIN_DECLS
 357 /* 1003.1-1990 */
 358 void     _exit(int) __dead2;
 359 int      access(const char *, int);
 360 unsigned int     alarm(unsigned int);
 361 int      chdir(const char *);
 362 int      chown(const char *, uid_t, gid_t);
 363 int      close(int);
 364 int      dup(int);
 365 int      dup2(int, int);
 366 #if __BSD_VISIBLE
 367 int      eaccess(const char *, int);
 368 #endif
 369 int      execl(const char *, const char *, ...);
 370 int      execle(const char *, const char *, ...);
 371 int      execlp(const char *, const char *, ...);
 372 int      execv(const char *, char * const *);
 373 int      execve(const char *, char * const *, char * const *);
 374 int      execvp(const char *, char * const *);
 375 pid_t    fork(void);
 376 long     fpathconf(int, int);
 377 char    *getcwd(char *, size_t);
 378 gid_t    getegid(void);
 379 uid_t    geteuid(void);
 380 gid_t    getgid(void);
 381 int      getgroups(int, gid_t []);
 382 char    *getlogin(void);
 383 pid_t    getpgrp(void);
 384 pid_t    getpid(void);
 385 pid_t    getppid(void);
 386 uid_t    getuid(void);
 387 int      isatty(int);
 388 int      link(const char *, const char *);
 389 off_t    lseek(int, off_t, int);
 390 long     pathconf(const char *, int);
 391 int      pause(void);
 392 int      pipe(int *);
 393 int      pipe2(int *, int);
 394 ssize_t  read(int, void *, size_t);
 395 int      rmdir(const char *);
 396 int      setgid(gid_t);
 397 int      setpgid(pid_t, pid_t);
 398 pid_t    setsid(void);
 399 int      setuid(uid_t);
 400 unsigned int     sleep(unsigned int);
 401 long     sysconf(int);
 402 pid_t    tcgetpgrp(int);
 403 int      tcsetpgrp(int, pid_t);
 404 char    *ttyname(int);
 405 int      ttyname_r(int, char *, size_t);
 406 int      unlink(const char *);
 407 ssize_t  write(int, const void *, size_t);
 408
 409 /* 1003.2-1992 */
 410 #if __POSIX_VISIBLE >= 199209 || __XSI_VISIBLE
 411 size_t   confstr(int, char *, size_t);
 412 #ifndef _GETOPT_DECLARED
 413 #define _GETOPT_DECLARED
 414 int      getopt(int, char * const [], const char *);
 415
 416 extern char *optarg;                    /* getopt(3) external variables */
 417 extern int optind, opterr, optopt;
 418 #endif /* _GETOPT_DECLARED */
 419 #endif
 420
 421 /* ISO/IEC 9945-1: 1996 */
 422 #if __POSIX_VISIBLE >= 199506 || __XSI_VISIBLE
 423 int      fsync(int);
 424
 425 /*
 426  * ftruncate() was in the POSIX Realtime Extension (it's used for shared
 427  * memory), but truncate() was not.
 428  */
 429 int      ftruncate(int, off_t);
 430 #endif
 431
 432 #if __POSIX_VISIBLE >= 199506
 433 int      getlogin_r(char *, int);
 434 #endif
 435
 436 /* 1003.1-2001 */
 437 #if __POSIX_VISIBLE >= 200112 || __XSI_VISIBLE
 438 int      fchown(int, uid_t, gid_t);
 439 ssize_t  readlink(const char * __restrict, char * __restrict, size_t);
 440 #endif
 441 #if __POSIX_VISIBLE >= 200112
 442 int      gethostname(char *, size_t);
 443 int      setegid(gid_t);
 444 int      seteuid(uid_t);
 445 #endif
 446
 447 /* 1003.1-2008 */
 448 #if __POSIX_VISIBLE >= 200809 || __XSI_VISIBLE
 449 int      getsid(pid_t _pid);
 450 int      fchdir(int);
 451 int      getpgid(pid_t _pid);
 452 int      lchown(const char *, uid_t, gid_t);
 453 #ifndef _MKDTEMP_DECLARED
 454 char    *mkdtemp(char *);
 455 #define _MKDTEMP_DECLARED
 456 #endif
 457 #ifndef _MKSTEMP_DECLARED
 458 int      mkstemp(char *);
 459 #define _MKSTEMP_DECLARED
 460 #endif
 461 ssize_t  pread(int, void *, size_t, off_t);
 462 ssize_t  pwrite(int, const void *, size_t, off_t);
 463
 464 /* See comment at ftruncate() above. */
 465 int      truncate(const char *, off_t);
 466 #endif /* __POSIX_VISIBLE >= 200809 || __XSI_VISIBLE */
 467
 468 #if __POSIX_VISIBLE >= 200809
 469 int     faccessat(int, const char *, int, int);
 470 int     fchownat(int, const char *, uid_t, gid_t, int);
 471 #if 0
 472 int     fexecve(int, char *const [], char *const []);
 473 #endif
 474 int     linkat(int, const char *, int, const char *, int);
 475 ssize_t readlinkat(int, const char * __restrict, char * __restrict, size_t);
 476 int     symlinkat(const char *, int, const char *);
 477 int     unlinkat(int, const char *, int);
 478 #endif /* __POSIX_VISIBLE >= 200809 */
 479
 480 /*
 481  * symlink() was originally in POSIX.1a, which was withdrawn after
 482  * being overtaken by events (1003.1-2001).  It was in XPG4.2, and of
 483  * course has been in BSD since 4.2.
 484  */
 485 #if __POSIX_VISIBLE >= 200112 || __XSI_VISIBLE >= 402
 486 int      symlink(const char * __restrict, const char * __restrict);
 487 #endif
 488
 489 /* X/Open System Interfaces */
 490 #if __XSI_VISIBLE
 491 char    *crypt(const char *, const char *);
 492 int      encrypt(char *, int);
 493 long     gethostid(void);
 494 int      lockf(int, int, off_t);
 495 int      nice(int);
 496 int      setpgrp(pid_t _pid, pid_t _pgrp); /* obsoleted by setpgid() */
 497 int      setregid(gid_t, gid_t);
 498 int      setreuid(uid_t, uid_t);
 499
 500 #ifndef _SWAB_DECLARED
 501 #define _SWAB_DECLARED
 502 void     swab(const void * __restrict, void * __restrict, ssize_t);
 503 #endif /* _SWAB_DECLARED */
 504
 505 void     sync(void);
 506
 507 #endif /* __XSI_VISIBLE */
 508
 509 #if (__XSI_VISIBLE && __XSI_VISIBLE <= 500) || __BSD_VISIBLE
 510 int      brk(const void *);
 511 int      chroot(const char *);
 512 int      chroot_kernel(const char *);
 513 int      getdtablesize(void);
 514 int      getpagesize(void) __pure2;
 515 char    *getpass(const char *);
 516 void    *sbrk(intptr_t);
 517 #endif
 518
 519 #if (__XSI_VISIBLE && __XSI_VISIBLE <= 600) || __BSD_VISIBLE
 520 char    *getwd(char *);                 /* LEGACY (obsoleted by getcwd()) */
 521 unsigned int
 522          ualarm(unsigned int, unsigned int);
 523 int      usleep(unsigned int);
 524 pid_t    vfork(void) __returns_twice;
 525 #endif
 526
 527 #if __BSD_VISIBLE
 528 struct iovec;
 529 int      acct(const char *);
 530 int      async_daemon(void);
 531 int      closefrom(int);
 532 const char *
 533          crypt_get_format(void);
 534 int      crypt_set_format(const char *);
 535 void     endusershell(void);
 536 int      exect(const char *, char * const *, char * const *);
 537 int      execvP(const char *, const char *, char * const *);
 538 void     extexit(int, int, void *);
 539 ssize_t  extpread(int, void *, size_t, int, off_t);
 540 ssize_t  extpreadv(int, const struct iovec *, u_int, int, off_t);
 541 ssize_t  extpwrite(int, const void *, size_t, int, off_t);
 542 ssize_t  extpwritev(int, const struct iovec *, u_int, int, off_t);
 543 char    *fflagstostr(u_long);
 544 int      getdomainname(char *, int);
 545 int      getgrouplist(const char *, gid_t, gid_t *, int *);
 546 mode_t   getmode(const void *, mode_t);
 547 int      getosreldate(void);
 548 int      getpeereid(int, uid_t *, gid_t *);
 549 int      getresgid(gid_t *, gid_t *, gid_t *);
 550 int      getresuid(uid_t *, uid_t *, uid_t *);
 551 char    *getusershell(void);
 552 int      initgroups(const char *, gid_t);
 553 int      iruserok(unsigned long, int, const char *, const char *);
 554 int      iruserok_sa(const void *, int, int, const char *, const char *);
 555 int      issetugid(void);
 556 long     lpathconf(const char *, int);
 557 #ifndef _LWP_GETTID_DECLARED
 558 lwpid_t  lwp_gettid(void);
 559 #define _LWP_GETTID_DECLARED
 560 #endif
 561 #ifndef _LWP_SETNAME_DECLARED
 562 int     lwp_setname(lwpid_t, const char *);
 563 #define _LWP_SETNAME_DECLARED
 564 #endif
 565 #ifndef _MKNOD_DECLARED
 566 int      mknod(const char *, mode_t, dev_t);
 567 #define _MKNOD_DECLARED
 568 #endif
 569 int      mkstemps(char *, int);
 570 #ifndef _MKTEMP_DECLARED
 571 char    *mktemp(char *);
 572 #define _MKTEMP_DECLARED
 573 #endif
 574 int      nfssvc(int, void *);
 575 int      profil(char *, size_t, vm_offset_t, int);
 576 int      rcmd(char **, int, const char *, const char *, const char *, int *);
 577 int      rcmd_af(char **, int, const char *, const char *, const char *, int *,
 578                  int);
 579 int      rcmdsh(char **, int, const char *, const char *, const char *,
 580                 const char *);
 581 char    *re_comp(const char *);
 582 int      re_exec(const char *);
 583 int      reboot(int);
 584 int      revoke(const char *);
 585 pid_t    rfork(int);
 586 pid_t    rfork_thread(int, void *, int (*)(void *), void *);
 587 int      rresvport(int *);
 588 int      rresvport_af(int *, int);
 589 int      ruserok(const char *, int, const char *, const char *);
 590 int      setdomainname(const char *, int);
 591 int      setgroups(int, const gid_t *);
 592 void     sethostid(long);
 593 int      sethostname(const char *, int);
 594 int      setlogin(const char *);
 595 void    *setmode(const char *);
 596 void     setproctitle(const char *_fmt, ...) __printf0like(1, 2);
 597 int      setresgid(gid_t, gid_t, gid_t);
 598 int      setresuid(uid_t, uid_t, uid_t);
 599 int      setrgid(gid_t);
 600 int      setruid(uid_t);
 601 void     setusershell(void);
 602 int      strtofflags(char **, u_long *, u_long *);
 603 int      swapoff(const char *);
 604 int      swapon(const char *);
 605 int      syscall(int, ...);
 606 off_t    __syscall(quad_t, ...);
 607 int      ttyslot(void);
 608 int      umtx_sleep(volatile const int *, int , int);
 609 int      umtx_wakeup(volatile const int *, int);
 610 int      undelete(const char *);
 611 void    *valloc(size_t);                        /* obsoleted by malloc() */
 612 int      varsym_get(int, const char *, char *, int);
 613 int      varsym_list(int, char *, int, int *);
 614 int      varsym_set(int, const char *, const char *);
 615
 616 #ifndef _OPTRESET_DECLARED
 617 #define _OPTRESET_DECLARED
 618 extern int optreset;                    /* getopt(3) external variable */
 619 #endif
 620 #endif /* __BSD_VISIBLE */
 621 __END_DECLS
 622
 623 #endif /* !_UNISTD_H_ */