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 * $FreeBSD$ 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/_types.h> 44 45 #ifndef _GID_T_DECLARED 46 typedef __gid_t gid_t; 47 #define _GID_T_DECLARED 48 #endif 49 50 #ifndef _SIZE_T_DECLARED 51 typedef __size_t size_t; 52 #define _SIZE_T_DECLARED 53 #endif 54 55 #ifndef _SSIZE_T_DECLARED 56 typedef __ssize_t ssize_t; 57 #define _SSIZE_T_DECLARED 58 #endif 59 60 #ifndef _UID_T_DECLARED 61 typedef __uid_t_ uid_t; 62 #define _UID_T_DECLARED 63 #endif 64 65 /* 66 * XXX missing type definitions for off_t, pid_t and useconds_t. 67 */ 68 69 #define STDIN_FILENO 0 /* standard input file descriptor */ 70 #define STDOUT_FILENO 1 /* standard output file descriptor */ 71 #define STDERR_FILENO 2 /* standard error file descriptor */ 72 73 #ifndef NULL 74 #define NULL 0 /* null pointer constant */ 75 #endif 76 77 #if __XSI_VISIBLE || __POSIX_VISIBLE >= 200112 78 #define F_ULOCK 0 /* unlock locked section */ 79 #define F_LOCK 1 /* lock a section for exclusive use */ 80 #define F_TLOCK 2 /* test and lock a section for exclusive use */ 81 #define F_TEST 3 /* test a section for locks by other procs */ 82 #endif 83 84 /* 85 * POSIX options and option groups we unconditionally do or don't 86 * implement. This list includes those options which are exclusively 87 * implemented (or not) in user mode. Please keep this list in 88 * alphabetical order. 89 * 90 * Anything which is defined as zero below **must** have an 91 * implementation for the corresponding sysconf() which is able to 92 * determine conclusively whether or not the feature is supported. 93 * Anything which is defined as other than -1 below **must** have 94 * complete headers, types, and function declarations as specified by 95 * the POSIX standard; however, if the relevant sysconf() function 96 * returns -1, the functions may be stubbed out. 97 */ 98 #define _POSIX_BARRIERS -1 99 #define _POSIX_READER_WRITER_LOCKS 200112L 100 #define _POSIX_REGEXP 1 101 #define _POSIX_SHELL 1 102 #define _POSIX_SPAWN -1 103 #define _POSIX_SPIN_LOCKS -1 104 #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 /* Keys for the confstr(3) function. */ 290 #if __POSIX_VISIBLE >= 199209 291 #define _CS_PATH 1 /* default value of PATH */ 292 #endif 293 294 #if __POSIX_VISIBLE >= 200112 295 #define _CS_POSIX_V6_ILP32_OFF32_CFLAGS 2 296 #define _CS_POSIX_V6_ILP32_OFF32_LDFLAGS 3 297 #define _CS_POSIX_V6_ILP32_OFF32_LIBS 4 298 #define _CS_POSIX_V6_ILP32_OFFBIG_CFLAGS 5 299 #define _CS_POSIX_V6_ILP32_OFFBIG_LDFLAGS 6 300 #define _CS_POSIX_V6_ILP32_OFFBIG_LIBS 7 301 #define _CS_POSIX_V6_LP64_OFF64_CFLAGS 8 302 #define _CS_POSIX_V6_LP64_OFF64_LDFLAGS 9 303 #define _CS_POSIX_V6_LP64_OFF64_LIBS 10 304 #define _CS_POSIX_V6_LPBIG_OFFBIG_CFLAGS 11 305 #define _CS_POSIX_V6_LPBIG_OFFBIG_LDFLAGS 12 306 #define _CS_POSIX_V6_LPBIG_OFFBIG_LIBS 13 307 #define _CS_POSIX_V6_WIDTH_RESTRICTED_ENVS 14 308 #endif 309 310 __BEGIN_DECLS 311 /* 1003.1-1990 */ 312 void _exit(int) __dead2; 313 int access(const char *, int); 314 unsigned int alarm(unsigned int); 315 int chdir(const char *); 316 int chown(const char *, uid_t, gid_t); 317 int close(int); 318 int dup(int); 319 int dup2(int, int); 320 int eaccess(const char *, int); 321 int execl(const char *, const char *, ...); 322 int execle(const char *, const char *, ...); 323 int execlp(const char *, const char *, ...); 324 int execv(const char *, char * const *); 325 int execve(const char *, char * const *, char * const *); 326 int execvp(const char *, char * const *); 327 pid_t fork(void); 328 long fpathconf(int, int); 329 char *getcwd(char *, size_t); 330 gid_t getegid(void); 331 uid_t geteuid(void); 332 gid_t getgid(void); 333 int getgroups(int, gid_t []); 334 char *getlogin(void); 335 pid_t getpgrp(void); 336 pid_t getpid(void); 337 pid_t getppid(void); 338 uid_t getuid(void); 339 int isatty(int); 340 int link(const char *, const char *); 341 #ifndef _LSEEK_DECLARED 342 #define _LSEEK_DECLARED 343 off_t lseek(int, off_t, int); 344 #endif 345 long pathconf(const char *, int); 346 int pause(void); 347 int pipe(int *); 348 ssize_t read(int, void *, size_t); 349 int rmdir(const char *); 350 int setgid(gid_t); 351 int setpgid(pid_t, pid_t); 352 void setproctitle(const char *_fmt, ...) __printf0like(1, 2); 353 pid_t setsid(void); 354 int setuid(uid_t); 355 unsigned int sleep(unsigned int); 356 long sysconf(int); 357 pid_t tcgetpgrp(int); 358 int tcsetpgrp(int, pid_t); 359 char *ttyname(int); 360 int unlink(const char *); 361 ssize_t write(int, const void *, size_t); 362 363 /* 1003.2-1992 */ 364 #if __POSIX_VISIBLE >= 199209 365 size_t confstr(int, char *, size_t); 366 int getopt(int, char * const [], const char *); 367 368 extern char *optarg; /* getopt(3) external variables */ 369 extern int optind, opterr, optopt; 370 #endif 371 372 /* ISO/IEC 9945-1: 1996 */ 373 #if __POSIX_VISIBLE >= 199506 374 int fsync(int); 375 376 /* 377 * ftruncate() was in the POSIX Realtime Extension (it's used for shared 378 * memory), but truncate() was not. 379 */ 380 #ifndef _FTRUNCATE_DECLARED 381 #define _FTRUNCATE_DECLARED 382 int ftruncate(int, off_t); 383 #endif 384 385 int getlogin_r(char *, int); 386 #endif 387 388 /* 1003.1-2001 */ 389 #if __POSIX_VISIBLE >= 200112 390 int fchown(int, uid_t, gid_t); 391 int gethostname(char *, int /* socklen_t */); 392 int setegid(gid_t); 393 int seteuid(uid_t); 394 #endif 395 396 /* 397 * symlink() was originally in POSIX.1a, which was withdrawn after 398 * being overtaken by events (1003.1-2001). It was in XPG4.2, and of 399 * course has been in BSD since 4.2. 400 */ 401 #if __POSIX_VISIBLE >= 200112 || __XSI_VISIBLE >= 402 || __BSD_VISIBLE 402 int symlink(const char * __restrict, const char * __restrict); 403 #endif 404 405 /* X/Open System Interfaces */ 406 #if __XSI_VISIBLE 407 char *crypt(const char *, const char *); 408 /* char *ctermid(char *); */ /* XXX ??? */ 409 int encrypt(char *, int); 410 int fchdir(int); 411 int getpgid(pid_t _pid); 412 int getsid(pid_t _pid); 413 char *getwd(char *); /* LEGACY: obsoleted by getcwd() */ 414 int lchown(const char *, uid_t, gid_t); 415 int lockf(int, int, off_t); 416 int nice(int); 417 ssize_t pread(int, void *, size_t, off_t); 418 ssize_t pwrite(int, const void *, size_t, off_t); 419 int setpgrp(pid_t _pid, pid_t _pgrp); /* obsoleted by setpgid() */ 420 int setregid(gid_t, gid_t); 421 int setreuid(uid_t, uid_t); 422 /* void swab(const void * __restrict, void * __restrict, ssize_t); */ 423 void sync(void); 424 unsigned int ualarm(unsigned int, unsigned int); 425 int usleep(unsigned int); 426 pid_t vfork(void); 427 428 /* See comment at ftruncate() above. */ 429 #ifndef _TRUNCATE_DECLARED 430 #define _TRUNCATE_DECLARED 431 int truncate(const char *, off_t); 432 #endif 433 #endif /* __XSI_VISIBLE */ 434 435 #if __BSD_VISIBLE 436 struct timeval; /* select(2) */ 437 int acct(const char *); 438 int async_daemon(void); 439 int brk(const void *); 440 int check_utility_compat(const char *); 441 int chroot(const char *); 442 const char * 443 crypt_get_format(void); 444 int crypt_set_format(const char *); 445 int des_cipher(const char *, char *, long, int); 446 int des_setkey(const char *key); 447 void endusershell(void); 448 int exect(const char *, char * const *, char * const *); 449 char *fflagstostr(u_long); 450 int getdomainname(char *, int); 451 int getdtablesize(void); 452 int getgrouplist(const char *, gid_t, gid_t *, int *); 453 long gethostid(void); 454 mode_t getmode(const void *, mode_t); 455 int getpagesize(void) __pure2; 456 char *getpass(const char *); 457 int getpeereid(int, uid_t *, gid_t *); 458 int getresgid(gid_t *, gid_t *, gid_t *); 459 int getresuid(uid_t *, uid_t *, uid_t *); 460 char *getusershell(void); 461 int initgroups(const char *, gid_t); 462 int iruserok(unsigned long, int, const char *, const char *); 463 int iruserok_sa(const void *, int, int, const char *, const char *); 464 int issetugid(void); 465 char *mkdtemp(char *); 466 int mknod(const char *, mode_t, dev_t); 467 #ifndef _MKSTEMP_DECLARED 468 int mkstemp(char *); 469 #define _MKSTEMP_DECLARED 470 #endif 471 int mkstemps(char *, int); 472 #ifndef _MKTEMP_DECLARED 473 char *mktemp(char *); 474 #define _MKTEMP_DECLARED 475 #endif 476 int nfsclnt(int, void *); 477 int nfssvc(int, void *); 478 int profil(char *, size_t, vm_offset_t, int); 479 int rcmd(char **, int, const char *, const char *, const char *, int *); 480 int rcmd_af(char **, int, const char *, 481 const char *, const char *, int *, int); 482 int rcmdsh(char **, int, const char *, 483 const char *, const char *, const char *); 484 char *re_comp(const char *); 485 int re_exec(const char *); 486 int readlink(const char *, char *, int); 487 int reboot(int); 488 int revoke(const char *); 489 pid_t rfork(int); 490 pid_t rfork_thread(int, void *, int (*)(void *), void *); 491 int rresvport(int *); 492 int rresvport_af(int *, int); 493 int ruserok(const char *, int, const char *, const char *); 494 void *sbrk(intptr_t); 495 #if __BSD_VISIBLE 496 #ifndef _SELECT_DECLARED 497 #define _SELECT_DECLARED 498 int select(int, fd_set *, fd_set *, fd_set *, struct timeval *); 499 #endif 500 #endif 501 int setdomainname(const char *, int); 502 int setgroups(int, const gid_t *); 503 void sethostid(long); 504 int sethostname(const char *, int); 505 #ifndef _SETKEY_DECLARED 506 int setkey(const char *); 507 #define _SETKEY_DECLARED 508 #endif 509 int setlogin(const char *); 510 void *setmode(const char *); 511 int setresgid(gid_t, gid_t, gid_t); 512 int setresuid(uid_t, uid_t, uid_t); 513 int setrgid(gid_t); 514 int setruid(uid_t); 515 void setusershell(void); 516 int strtofflags(char **, u_long *, u_long *); 517 int swapon(const char *); 518 int syscall(int, ...); 519 off_t __syscall(quad_t, ...); 520 int ttyslot(void); 521 int undelete(const char *); 522 int unwhiteout(const char *); 523 void *valloc(size_t); /* obsoleted by malloc() */ 524 525 extern char *suboptarg; /* getsubopt(3) external variable */ 526 #ifndef _GETSUBOPT_DECLARED 527 int getsubopt(char **, char * const *, char **); 528 #define _GETSUBOPT_DECLARED 529 #endif 530 extern int optreset; /* getopt(3) external variable */ 531 #endif /* __BSD_VISIBLE */ 532 __END_DECLS 533 534 #endif /* !_UNISTD_H_ */ 535