lib/unistd.in.h

   1 /* Substitute for and wrapper around <unistd.h>.
   2    Copyright (C) 2003-2016 Free Software Foundation, Inc.
   3
   4    This program is free software; you can redistribute it and/or modify
   5    it under the terms of the GNU General Public License as published by
   6    the Free Software Foundation; either version 3, or (at your option)
   7    any later version.
   8
   9    This program is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12    GNU General Public License for more details.
  13
  14    You should have received a copy of the GNU General Public License
  15    along with this program; if not, see <http://www.gnu.org/licenses/>.  */
  16
  17 #ifndef _@GUARD_PREFIX@_UNISTD_H
  18
  19 #if __GNUC__ >= 3
  20 @PRAGMA_SYSTEM_HEADER@
  21 #endif
  22 @PRAGMA_COLUMNS@
  23
  24 #ifdef _GL_INCLUDING_UNISTD_H
  25 /* Special invocation convention:
  26    - On Mac OS X 10.3.9 we have a sequence of nested includes
  27      <unistd.h> -> <signal.h> -> <pthread.h> -> <unistd.h>
  28      In this situation, the functions are not yet declared, therefore we cannot
  29      provide the C++ aliases.  */
  30
  31 #@INCLUDE_NEXT@ @NEXT_UNISTD_H@
  32
  33 #else
  34 /* Normal invocation convention.  */
  35
  36 /* The include_next requires a split double-inclusion guard.  */
  37 #if @HAVE_UNISTD_H@
  38 # define _GL_INCLUDING_UNISTD_H
  39 # @INCLUDE_NEXT@ @NEXT_UNISTD_H@
  40 # undef _GL_INCLUDING_UNISTD_H
  41 #endif
  42
  43 /* Get all possible declarations of gethostname().  */
  44 #if @GNULIB_GETHOSTNAME@ && @UNISTD_H_HAVE_WINSOCK2_H@ \
  45   && !defined _GL_INCLUDING_WINSOCK2_H
  46 # define _GL_INCLUDING_WINSOCK2_H
  47 # include <winsock2.h>
  48 # undef _GL_INCLUDING_WINSOCK2_H
  49 #endif
  50
  51 #if !defined _@GUARD_PREFIX@_UNISTD_H && !defined _GL_INCLUDING_WINSOCK2_H
  52 #define _@GUARD_PREFIX@_UNISTD_H
  53
  54 /* NetBSD 5.0 mis-defines NULL.  Also get size_t.  */
  55 #include <stddef.h>
  56
  57 /* mingw doesn't define the SEEK_* or *_FILENO macros in <unistd.h>.  */
  58 /* Cygwin 1.7.1 declares symlinkat in <stdio.h>, not in <unistd.h>.  */
  59 /* But avoid namespace pollution on glibc systems.  */
  60 #if (!(defined SEEK_CUR && defined SEEK_END && defined SEEK_SET) \
  61      || ((@GNULIB_SYMLINKAT@ || defined GNULIB_POSIXCHECK) \
  62          && defined __CYGWIN__)) \
  63     && ! defined __GLIBC__
  64 # include <stdio.h>
  65 #endif
  66
  67 /* Cygwin 1.7.1 declares unlinkat in <fcntl.h>, not in <unistd.h>.  */
  68 /* But avoid namespace pollution on glibc systems.  */
  69 #if (@GNULIB_UNLINKAT@ || defined GNULIB_POSIXCHECK) && defined __CYGWIN__ \
  70     && ! defined __GLIBC__
  71 # include <fcntl.h>
  72 #endif
  73
  74 /* mingw fails to declare _exit in <unistd.h>.  */
  75 /* mingw, MSVC, BeOS, Haiku declare environ in <stdlib.h>, not in
  76    <unistd.h>.  */
  77 /* Solaris declares getcwd not only in <unistd.h> but also in <stdlib.h>.  */
  78 /* OSF Tru64 Unix cannot see gnulib rpl_strtod when system <stdlib.h> is
  79    included here.  */
  80 /* But avoid namespace pollution on glibc systems.  */
  81 #if !defined __GLIBC__ && !defined __osf__
  82 # define __need_system_stdlib_h
  83 # include <stdlib.h>
  84 # undef __need_system_stdlib_h
  85 #endif
  86
  87 /* Native Windows platforms declare chdir, getcwd, rmdir in
  88    <io.h> and/or <direct.h>, not in <unistd.h>.
  89    They also declare access(), chmod(), close(), dup(), dup2(), isatty(),
  90    lseek(), read(), unlink(), write() in <io.h>.  */
  91 #if ((@GNULIB_CHDIR@ || @GNULIB_GETCWD@ || @GNULIB_RMDIR@ \
  92       || defined GNULIB_POSIXCHECK) \
  93      && ((defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__))
  94 # include <io.h>     /* mingw32, mingw64 */
  95 # include <direct.h> /* mingw64, MSVC 9 */
  96 #elif (@GNULIB_CLOSE@ || @GNULIB_DUP@ || @GNULIB_DUP2@ || @GNULIB_ISATTY@ \
  97        || @GNULIB_LSEEK@ || @GNULIB_READ@ || @GNULIB_UNLINK@ || @GNULIB_WRITE@ \
  98        || defined GNULIB_POSIXCHECK) \
  99       && ((defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__)
 100 # include <io.h>
 101 #endif
 102
 103 /* AIX and OSF/1 5.1 declare getdomainname in <netdb.h>, not in <unistd.h>.
 104    NonStop Kernel declares gethostname in <netdb.h>, not in <unistd.h>.  */
 105 /* But avoid namespace pollution on glibc systems.  */
 106 #if ((@GNULIB_GETDOMAINNAME@ && (defined _AIX || defined __osf__)) \
 107      || (@GNULIB_GETHOSTNAME@ && defined __TANDEM)) \
 108     && !defined __GLIBC__
 109 # include <netdb.h>
 110 #endif
 111
 112 /* MSVC defines off_t in <sys/types.h>.
 113    May also define off_t to a 64-bit type on native Windows.  */
 114 #if !@HAVE_UNISTD_H@ || @WINDOWS_64_BIT_OFF_T@
 115 /* Get off_t.  */
 116 # include <sys/types.h>
 117 #endif
 118
 119 #if (@GNULIB_READ@ || @GNULIB_WRITE@ \
 120      || @GNULIB_READLINK@ || @GNULIB_READLINKAT@ \
 121      || @GNULIB_PREAD@ || @GNULIB_PWRITE@ || defined GNULIB_POSIXCHECK)
 122 /* Get ssize_t.  */
 123 # include <sys/types.h>
 124 #endif
 125
 126 /* Get getopt(), optarg, optind, opterr, optopt.
 127    But avoid namespace pollution on glibc systems.  */
 128 #if @GNULIB_UNISTD_H_GETOPT@ && !defined __GLIBC__ && !defined _GL_SYSTEM_GETOPT
 129 # define __need_getopt
 130 # include <getopt.h>
 131 #endif
 132
 133 #ifndef _GL_INLINE_HEADER_BEGIN
 134  #error "Please include config.h first."
 135 #endif
 136 _GL_INLINE_HEADER_BEGIN
 137 #ifndef _GL_UNISTD_INLINE
 138 # define _GL_UNISTD_INLINE _GL_INLINE
 139 #endif
 140
 141 /* The definitions of _GL_FUNCDECL_RPL etc. are copied here.  */
 142
 143 /* The definition of _GL_ARG_NONNULL is copied here.  */
 144
 145 /* The definition of _GL_WARN_ON_USE is copied here.  */
 146
 147
 148 /* Hide some function declarations from <winsock2.h>.  */
 149
 150 #if @GNULIB_GETHOSTNAME@ && @UNISTD_H_HAVE_WINSOCK2_H@
 151 # if !defined _@GUARD_PREFIX@_SYS_SOCKET_H
 152 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 153 #   undef socket
 154 #   define socket              socket_used_without_including_sys_socket_h
 155 #   undef connect
 156 #   define connect             connect_used_without_including_sys_socket_h
 157 #   undef accept
 158 #   define accept              accept_used_without_including_sys_socket_h
 159 #   undef bind
 160 #   define bind                bind_used_without_including_sys_socket_h
 161 #   undef getpeername
 162 #   define getpeername         getpeername_used_without_including_sys_socket_h
 163 #   undef getsockname
 164 #   define getsockname         getsockname_used_without_including_sys_socket_h
 165 #   undef getsockopt
 166 #   define getsockopt          getsockopt_used_without_including_sys_socket_h
 167 #   undef listen
 168 #   define listen              listen_used_without_including_sys_socket_h
 169 #   undef recv
 170 #   define recv                recv_used_without_including_sys_socket_h
 171 #   undef send
 172 #   define send                send_used_without_including_sys_socket_h
 173 #   undef recvfrom
 174 #   define recvfrom            recvfrom_used_without_including_sys_socket_h
 175 #   undef sendto
 176 #   define sendto              sendto_used_without_including_sys_socket_h
 177 #   undef setsockopt
 178 #   define setsockopt          setsockopt_used_without_including_sys_socket_h
 179 #   undef shutdown
 180 #   define shutdown            shutdown_used_without_including_sys_socket_h
 181 #  else
 182     _GL_WARN_ON_USE (socket,
 183                      "socket() used without including <sys/socket.h>");
 184     _GL_WARN_ON_USE (connect,
 185                      "connect() used without including <sys/socket.h>");
 186     _GL_WARN_ON_USE (accept,
 187                      "accept() used without including <sys/socket.h>");
 188     _GL_WARN_ON_USE (bind,
 189                      "bind() used without including <sys/socket.h>");
 190     _GL_WARN_ON_USE (getpeername,
 191                      "getpeername() used without including <sys/socket.h>");
 192     _GL_WARN_ON_USE (getsockname,
 193                      "getsockname() used without including <sys/socket.h>");
 194     _GL_WARN_ON_USE (getsockopt,
 195                      "getsockopt() used without including <sys/socket.h>");
 196     _GL_WARN_ON_USE (listen,
 197                      "listen() used without including <sys/socket.h>");
 198     _GL_WARN_ON_USE (recv,
 199                      "recv() used without including <sys/socket.h>");
 200     _GL_WARN_ON_USE (send,
 201                      "send() used without including <sys/socket.h>");
 202     _GL_WARN_ON_USE (recvfrom,
 203                      "recvfrom() used without including <sys/socket.h>");
 204     _GL_WARN_ON_USE (sendto,
 205                      "sendto() used without including <sys/socket.h>");
 206     _GL_WARN_ON_USE (setsockopt,
 207                      "setsockopt() used without including <sys/socket.h>");
 208     _GL_WARN_ON_USE (shutdown,
 209                      "shutdown() used without including <sys/socket.h>");
 210 #  endif
 211 # endif
 212 # if !defined _@GUARD_PREFIX@_SYS_SELECT_H
 213 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 214 #   undef select
 215 #   define select              select_used_without_including_sys_select_h
 216 #  else
 217     _GL_WARN_ON_USE (select,
 218                      "select() used without including <sys/select.h>");
 219 #  endif
 220 # endif
 221 #endif
 222
 223
 224 /* OS/2 EMX lacks these macros.  */
 225 #ifndef STDIN_FILENO
 226 # define STDIN_FILENO 0
 227 #endif
 228 #ifndef STDOUT_FILENO
 229 # define STDOUT_FILENO 1
 230 #endif
 231 #ifndef STDERR_FILENO
 232 # define STDERR_FILENO 2
 233 #endif
 234
 235 /* Ensure *_OK macros exist.  */
 236 #ifndef F_OK
 237 # define F_OK 0
 238 # define X_OK 1
 239 # define W_OK 2
 240 # define R_OK 4
 241 #endif
 242
 243
 244 /* Declare overridden functions.  */
 245
 246
 247 #if defined GNULIB_POSIXCHECK
 248 /* The access() function is a security risk.  */
 249 _GL_WARN_ON_USE (access, "the access function is a security risk - "
 250                  "use the gnulib module faccessat instead");
 251 #endif
 252
 253
 254 #if @GNULIB_CHDIR@
 255 _GL_CXXALIAS_SYS (chdir, int, (const char *file) _GL_ARG_NONNULL ((1)));
 256 _GL_CXXALIASWARN (chdir);
 257 #elif defined GNULIB_POSIXCHECK
 258 # undef chdir
 259 # if HAVE_RAW_DECL_CHDIR
 260 _GL_WARN_ON_USE (chown, "chdir is not always in <unistd.h> - "
 261                  "use gnulib module chdir for portability");
 262 # endif
 263 #endif
 264
 265
 266 #if @GNULIB_CHOWN@
 267 /* Change the owner of FILE to UID (if UID is not -1) and the group of FILE
 268    to GID (if GID is not -1).  Follow symbolic links.
 269    Return 0 if successful, otherwise -1 and errno set.
 270    See the POSIX:2008 specification
 271    <http://pubs.opengroup.org/onlinepubs/9699919799/functions/chown.html.  */
 272 # if @REPLACE_CHOWN@
 273 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 274 #   undef chown
 275 #   define chown rpl_chown
 276 #  endif
 277 _GL_FUNCDECL_RPL (chown, int, (const char *file, uid_t uid, gid_t gid)
 278                               _GL_ARG_NONNULL ((1)));
 279 _GL_CXXALIAS_RPL (chown, int, (const char *file, uid_t uid, gid_t gid));
 280 # else
 281 #  if !@HAVE_CHOWN@
 282 _GL_FUNCDECL_SYS (chown, int, (const char *file, uid_t uid, gid_t gid)
 283                               _GL_ARG_NONNULL ((1)));
 284 #  endif
 285 _GL_CXXALIAS_SYS (chown, int, (const char *file, uid_t uid, gid_t gid));
 286 # endif
 287 _GL_CXXALIASWARN (chown);
 288 #elif defined GNULIB_POSIXCHECK
 289 # undef chown
 290 # if HAVE_RAW_DECL_CHOWN
 291 _GL_WARN_ON_USE (chown, "chown fails to follow symlinks on some systems and "
 292                  "doesn't treat a uid or gid of -1 on some systems - "
 293                  "use gnulib module chown for portability");
 294 # endif
 295 #endif
 296
 297
 298 #if @GNULIB_CLOSE@
 299 # if @REPLACE_CLOSE@
 300 /* Automatically included by modules that need a replacement for close.  */
 301 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 302 #   undef close
 303 #   define close rpl_close
 304 #  endif
 305 _GL_FUNCDECL_RPL (close, int, (int fd));
 306 _GL_CXXALIAS_RPL (close, int, (int fd));
 307 # else
 308 _GL_CXXALIAS_SYS (close, int, (int fd));
 309 # endif
 310 _GL_CXXALIASWARN (close);
 311 #elif @UNISTD_H_HAVE_WINSOCK2_H_AND_USE_SOCKETS@
 312 # undef close
 313 # define close close_used_without_requesting_gnulib_module_close
 314 #elif defined GNULIB_POSIXCHECK
 315 # undef close
 316 /* Assume close is always declared.  */
 317 _GL_WARN_ON_USE (close, "close does not portably work on sockets - "
 318                  "use gnulib module close for portability");
 319 #endif
 320
 321
 322 #if @GNULIB_DUP@
 323 # if @REPLACE_DUP@
 324 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 325 #   define dup rpl_dup
 326 #  endif
 327 _GL_FUNCDECL_RPL (dup, int, (int oldfd));
 328 _GL_CXXALIAS_RPL (dup, int, (int oldfd));
 329 # else
 330 _GL_CXXALIAS_SYS (dup, int, (int oldfd));
 331 # endif
 332 _GL_CXXALIASWARN (dup);
 333 #elif defined GNULIB_POSIXCHECK
 334 # undef dup
 335 # if HAVE_RAW_DECL_DUP
 336 _GL_WARN_ON_USE (dup, "dup is unportable - "
 337                  "use gnulib module dup for portability");
 338 # endif
 339 #endif
 340
 341
 342 #if @GNULIB_DUP2@
 343 /* Copy the file descriptor OLDFD into file descriptor NEWFD.  Do nothing if
 344    NEWFD = OLDFD, otherwise close NEWFD first if it is open.
 345    Return newfd if successful, otherwise -1 and errno set.
 346    See the POSIX:2008 specification
 347    <http://pubs.opengroup.org/onlinepubs/9699919799/functions/dup2.html>.  */
 348 # if @REPLACE_DUP2@
 349 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 350 #   define dup2 rpl_dup2
 351 #  endif
 352 _GL_FUNCDECL_RPL (dup2, int, (int oldfd, int newfd));
 353 _GL_CXXALIAS_RPL (dup2, int, (int oldfd, int newfd));
 354 # else
 355 #  if !@HAVE_DUP2@
 356 _GL_FUNCDECL_SYS (dup2, int, (int oldfd, int newfd));
 357 #  endif
 358 _GL_CXXALIAS_SYS (dup2, int, (int oldfd, int newfd));
 359 # endif
 360 _GL_CXXALIASWARN (dup2);
 361 #elif defined GNULIB_POSIXCHECK
 362 # undef dup2
 363 # if HAVE_RAW_DECL_DUP2
 364 _GL_WARN_ON_USE (dup2, "dup2 is unportable - "
 365                  "use gnulib module dup2 for portability");
 366 # endif
 367 #endif
 368
 369
 370 #if @GNULIB_DUP3@
 371 /* Copy the file descriptor OLDFD into file descriptor NEWFD, with the
 372    specified flags.
 373    The flags are a bitmask, possibly including O_CLOEXEC (defined in <fcntl.h>)
 374    and O_TEXT, O_BINARY (defined in "binary-io.h").
 375    Close NEWFD first if it is open.
 376    Return newfd if successful, otherwise -1 and errno set.
 377    See the Linux man page at
 378    <http://www.kernel.org/doc/man-pages/online/pages/man2/dup3.2.html>.  */
 379 # if @HAVE_DUP3@
 380 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 381 #   define dup3 rpl_dup3
 382 #  endif
 383 _GL_FUNCDECL_RPL (dup3, int, (int oldfd, int newfd, int flags));
 384 _GL_CXXALIAS_RPL (dup3, int, (int oldfd, int newfd, int flags));
 385 # else
 386 _GL_FUNCDECL_SYS (dup3, int, (int oldfd, int newfd, int flags));
 387 _GL_CXXALIAS_SYS (dup3, int, (int oldfd, int newfd, int flags));
 388 # endif
 389 _GL_CXXALIASWARN (dup3);
 390 #elif defined GNULIB_POSIXCHECK
 391 # undef dup3
 392 # if HAVE_RAW_DECL_DUP3
 393 _GL_WARN_ON_USE (dup3, "dup3 is unportable - "
 394                  "use gnulib module dup3 for portability");
 395 # endif
 396 #endif
 397
 398
 399 #if @GNULIB_ENVIRON@
 400 # if !@HAVE_DECL_ENVIRON@
 401 /* Set of environment variables and values.  An array of strings of the form
 402    "VARIABLE=VALUE", terminated with a NULL.  */
 403 #  if defined __APPLE__ && defined __MACH__
 404 #   include <TargetConditionals.h>
 405 #   if !TARGET_OS_IPHONE && !TARGET_IPHONE_SIMULATOR
 406 #    define _GL_USE_CRT_EXTERNS
 407 #   endif
 408 #  endif
 409 #  ifdef _GL_USE_CRT_EXTERNS
 410 #   include <crt_externs.h>
 411 #   define environ (*_NSGetEnviron ())
 412 #  else
 413 #   ifdef __cplusplus
 414 extern "C" {
 415 #   endif
 416 extern char **environ;
 417 #   ifdef __cplusplus
 418 }
 419 #   endif
 420 #  endif
 421 # endif
 422 #elif defined GNULIB_POSIXCHECK
 423 # if HAVE_RAW_DECL_ENVIRON
 424 _GL_UNISTD_INLINE char ***
 425 rpl_environ (void)
 426 {
 427   return &environ;
 428 }
 429 _GL_WARN_ON_USE (rpl_environ, "environ is unportable - "
 430                  "use gnulib module environ for portability");
 431 #  undef environ
 432 #  define environ (*rpl_environ ())
 433 # endif
 434 #endif
 435
 436
 437 #if @GNULIB_EUIDACCESS@
 438 /* Like access(), except that it uses the effective user id and group id of
 439    the current process.  */
 440 # if !@HAVE_EUIDACCESS@
 441 _GL_FUNCDECL_SYS (euidaccess, int, (const char *filename, int mode)
 442                                    _GL_ARG_NONNULL ((1)));
 443 # endif
 444 _GL_CXXALIAS_SYS (euidaccess, int, (const char *filename, int mode));
 445 _GL_CXXALIASWARN (euidaccess);
 446 # if defined GNULIB_POSIXCHECK
 447 /* Like access(), this function is a security risk.  */
 448 _GL_WARN_ON_USE (euidaccess, "the euidaccess function is a security risk - "
 449                  "use the gnulib module faccessat instead");
 450 # endif
 451 #elif defined GNULIB_POSIXCHECK
 452 # undef euidaccess
 453 # if HAVE_RAW_DECL_EUIDACCESS
 454 _GL_WARN_ON_USE (euidaccess, "euidaccess is unportable - "
 455                  "use gnulib module euidaccess for portability");
 456 # endif
 457 #endif
 458
 459
 460 #if @GNULIB_FACCESSAT@
 461 # if !@HAVE_FACCESSAT@
 462 _GL_FUNCDECL_SYS (faccessat, int,
 463                   (int fd, char const *file, int mode, int flag)
 464                   _GL_ARG_NONNULL ((2)));
 465 # endif
 466 _GL_CXXALIAS_SYS (faccessat, int,
 467                   (int fd, char const *file, int mode, int flag));
 468 _GL_CXXALIASWARN (faccessat);
 469 #elif defined GNULIB_POSIXCHECK
 470 # undef faccessat
 471 # if HAVE_RAW_DECL_FACCESSAT
 472 _GL_WARN_ON_USE (faccessat, "faccessat is not portable - "
 473                  "use gnulib module faccessat for portability");
 474 # endif
 475 #endif
 476
 477
 478 #if @GNULIB_FCHDIR@
 479 /* Change the process' current working directory to the directory on which
 480    the given file descriptor is open.
 481    Return 0 if successful, otherwise -1 and errno set.
 482    See the POSIX:2008 specification
 483    <http://pubs.opengroup.org/onlinepubs/9699919799/functions/fchdir.html>.  */
 484 # if ! @HAVE_FCHDIR@
 485 _GL_FUNCDECL_SYS (fchdir, int, (int /*fd*/));
 486
 487 /* Gnulib internal hooks needed to maintain the fchdir metadata.  */
 488 _GL_EXTERN_C int _gl_register_fd (int fd, const char *filename)
 489      _GL_ARG_NONNULL ((2));
 490 _GL_EXTERN_C void _gl_unregister_fd (int fd);
 491 _GL_EXTERN_C int _gl_register_dup (int oldfd, int newfd);
 492 _GL_EXTERN_C const char *_gl_directory_name (int fd);
 493
 494 # else
 495 #  if !@HAVE_DECL_FCHDIR@
 496 _GL_FUNCDECL_SYS (fchdir, int, (int /*fd*/));
 497 #  endif
 498 # endif
 499 _GL_CXXALIAS_SYS (fchdir, int, (int /*fd*/));
 500 _GL_CXXALIASWARN (fchdir);
 501 #elif defined GNULIB_POSIXCHECK
 502 # undef fchdir
 503 # if HAVE_RAW_DECL_FCHDIR
 504 _GL_WARN_ON_USE (fchdir, "fchdir is unportable - "
 505                  "use gnulib module fchdir for portability");
 506 # endif
 507 #endif
 508
 509
 510 #if @GNULIB_FCHOWNAT@
 511 # if @REPLACE_FCHOWNAT@
 512 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 513 #   undef fchownat
 514 #   define fchownat rpl_fchownat
 515 #  endif
 516 _GL_FUNCDECL_RPL (fchownat, int, (int fd, char const *file,
 517                                   uid_t owner, gid_t group, int flag)
 518                                  _GL_ARG_NONNULL ((2)));
 519 _GL_CXXALIAS_RPL (fchownat, int, (int fd, char const *file,
 520                                   uid_t owner, gid_t group, int flag));
 521 # else
 522 #  if !@HAVE_FCHOWNAT@
 523 _GL_FUNCDECL_SYS (fchownat, int, (int fd, char const *file,
 524                                   uid_t owner, gid_t group, int flag)
 525                                  _GL_ARG_NONNULL ((2)));
 526 #  endif
 527 _GL_CXXALIAS_SYS (fchownat, int, (int fd, char const *file,
 528                                   uid_t owner, gid_t group, int flag));
 529 # endif
 530 _GL_CXXALIASWARN (fchownat);
 531 #elif defined GNULIB_POSIXCHECK
 532 # undef fchownat
 533 # if HAVE_RAW_DECL_FCHOWNAT
 534 _GL_WARN_ON_USE (fchownat, "fchownat is not portable - "
 535                  "use gnulib module openat for portability");
 536 # endif
 537 #endif
 538
 539
 540 #if @GNULIB_FDATASYNC@
 541 /* Synchronize changes to a file.
 542    Return 0 if successful, otherwise -1 and errno set.
 543    See POSIX:2008 specification
 544    <http://pubs.opengroup.org/onlinepubs/9699919799/functions/fdatasync.html>.  */
 545 # if !@HAVE_FDATASYNC@ || !@HAVE_DECL_FDATASYNC@
 546 _GL_FUNCDECL_SYS (fdatasync, int, (int fd));
 547 # endif
 548 _GL_CXXALIAS_SYS (fdatasync, int, (int fd));
 549 _GL_CXXALIASWARN (fdatasync);
 550 #elif defined GNULIB_POSIXCHECK
 551 # undef fdatasync
 552 # if HAVE_RAW_DECL_FDATASYNC
 553 _GL_WARN_ON_USE (fdatasync, "fdatasync is unportable - "
 554                  "use gnulib module fdatasync for portability");
 555 # endif
 556 #endif
 557
 558
 559 #if @GNULIB_FSYNC@
 560 /* Synchronize changes, including metadata, to a file.
 561    Return 0 if successful, otherwise -1 and errno set.
 562    See POSIX:2008 specification
 563    <http://pubs.opengroup.org/onlinepubs/9699919799/functions/fsync.html>.  */
 564 # if !@HAVE_FSYNC@
 565 _GL_FUNCDECL_SYS (fsync, int, (int fd));
 566 # endif
 567 _GL_CXXALIAS_SYS (fsync, int, (int fd));
 568 _GL_CXXALIASWARN (fsync);
 569 #elif defined GNULIB_POSIXCHECK
 570 # undef fsync
 571 # if HAVE_RAW_DECL_FSYNC
 572 _GL_WARN_ON_USE (fsync, "fsync is unportable - "
 573                  "use gnulib module fsync for portability");
 574 # endif
 575 #endif
 576
 577
 578 #if @GNULIB_FTRUNCATE@
 579 /* Change the size of the file to which FD is opened to become equal to LENGTH.
 580    Return 0 if successful, otherwise -1 and errno set.
 581    See the POSIX:2008 specification
 582    <http://pubs.opengroup.org/onlinepubs/9699919799/functions/ftruncate.html>.  */
 583 # if @REPLACE_FTRUNCATE@
 584 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 585 #   undef ftruncate
 586 #   define ftruncate rpl_ftruncate
 587 #  endif
 588 _GL_FUNCDECL_RPL (ftruncate, int, (int fd, off_t length));
 589 _GL_CXXALIAS_RPL (ftruncate, int, (int fd, off_t length));
 590 # else
 591 #  if !@HAVE_FTRUNCATE@
 592 _GL_FUNCDECL_SYS (ftruncate, int, (int fd, off_t length));
 593 #  endif
 594 _GL_CXXALIAS_SYS (ftruncate, int, (int fd, off_t length));
 595 # endif
 596 _GL_CXXALIASWARN (ftruncate);
 597 #elif defined GNULIB_POSIXCHECK
 598 # undef ftruncate
 599 # if HAVE_RAW_DECL_FTRUNCATE
 600 _GL_WARN_ON_USE (ftruncate, "ftruncate is unportable - "
 601                  "use gnulib module ftruncate for portability");
 602 # endif
 603 #endif
 604
 605
 606 #if @GNULIB_GETCWD@
 607 /* Get the name of the current working directory, and put it in SIZE bytes
 608    of BUF.
 609    Return BUF if successful, or NULL if the directory couldn't be determined
 610    or SIZE was too small.
 611    See the POSIX:2008 specification
 612    <http://pubs.opengroup.org/onlinepubs/9699919799/functions/getcwd.html>.
 613    Additionally, the gnulib module 'getcwd' guarantees the following GNU
 614    extension: If BUF is NULL, an array is allocated with 'malloc'; the array
 615    is SIZE bytes long, unless SIZE == 0, in which case it is as big as
 616    necessary.  */
 617 # if @REPLACE_GETCWD@
 618 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 619 #   define getcwd rpl_getcwd
 620 #  endif
 621 _GL_FUNCDECL_RPL (getcwd, char *, (char *buf, size_t size));
 622 _GL_CXXALIAS_RPL (getcwd, char *, (char *buf, size_t size));
 623 # else
 624 /* Need to cast, because on mingw, the second parameter is
 625                                                    int size.  */
 626 _GL_CXXALIAS_SYS_CAST (getcwd, char *, (char *buf, size_t size));
 627 # endif
 628 _GL_CXXALIASWARN (getcwd);
 629 #elif defined GNULIB_POSIXCHECK
 630 # undef getcwd
 631 # if HAVE_RAW_DECL_GETCWD
 632 _GL_WARN_ON_USE (getcwd, "getcwd is unportable - "
 633                  "use gnulib module getcwd for portability");
 634 # endif
 635 #endif
 636
 637
 638 #if @GNULIB_GETDOMAINNAME@
 639 /* Return the NIS domain name of the machine.
 640    WARNING! The NIS domain name is unrelated to the fully qualified host name
 641             of the machine.  It is also unrelated to email addresses.
 642    WARNING! The NIS domain name is usually the empty string or "(none)" when
 643             not using NIS.
 644
 645    Put up to LEN bytes of the NIS domain name into NAME.
 646    Null terminate it if the name is shorter than LEN.
 647    If the NIS domain name is longer than LEN, set errno = EINVAL and return -1.
 648    Return 0 if successful, otherwise set errno and return -1.  */
 649 # if @REPLACE_GETDOMAINNAME@
 650 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 651 #   undef getdomainname
 652 #   define getdomainname rpl_getdomainname
 653 #  endif
 654 _GL_FUNCDECL_RPL (getdomainname, int, (char *name, size_t len)
 655                                       _GL_ARG_NONNULL ((1)));
 656 _GL_CXXALIAS_RPL (getdomainname, int, (char *name, size_t len));
 657 # else
 658 #  if !@HAVE_DECL_GETDOMAINNAME@
 659 _GL_FUNCDECL_SYS (getdomainname, int, (char *name, size_t len)
 660                                       _GL_ARG_NONNULL ((1)));
 661 #  endif
 662 _GL_CXXALIAS_SYS (getdomainname, int, (char *name, size_t len));
 663 # endif
 664 _GL_CXXALIASWARN (getdomainname);
 665 #elif defined GNULIB_POSIXCHECK
 666 # undef getdomainname
 667 # if HAVE_RAW_DECL_GETDOMAINNAME
 668 _GL_WARN_ON_USE (getdomainname, "getdomainname is unportable - "
 669                  "use gnulib module getdomainname for portability");
 670 # endif
 671 #endif
 672
 673
 674 #if @GNULIB_GETDTABLESIZE@
 675 /* Return the maximum number of file descriptors in the current process.
 676    In POSIX, this is same as sysconf (_SC_OPEN_MAX).  */
 677 # if @REPLACE_GETDTABLESIZE@
 678 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 679 #   undef getdtablesize
 680 #   define getdtablesize rpl_getdtablesize
 681 #  endif
 682 _GL_FUNCDECL_RPL (getdtablesize, int, (void));
 683 _GL_CXXALIAS_RPL (getdtablesize, int, (void));
 684 # else
 685 #  if !@HAVE_GETDTABLESIZE@
 686 _GL_FUNCDECL_SYS (getdtablesize, int, (void));
 687 #  endif
 688 _GL_CXXALIAS_SYS (getdtablesize, int, (void));
 689 # endif
 690 _GL_CXXALIASWARN (getdtablesize);
 691 #elif defined GNULIB_POSIXCHECK
 692 # undef getdtablesize
 693 # if HAVE_RAW_DECL_GETDTABLESIZE
 694 _GL_WARN_ON_USE (getdtablesize, "getdtablesize is unportable - "
 695                  "use gnulib module getdtablesize for portability");
 696 # endif
 697 #endif
 698
 699
 700 #if @GNULIB_GETGROUPS@
 701 /* Return the supplemental groups that the current process belongs to.
 702    It is unspecified whether the effective group id is in the list.
 703    If N is 0, return the group count; otherwise, N describes how many
 704    entries are available in GROUPS.  Return -1 and set errno if N is
 705    not 0 and not large enough.  Fails with ENOSYS on some systems.  */
 706 # if @REPLACE_GETGROUPS@
 707 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 708 #   undef getgroups
 709 #   define getgroups rpl_getgroups
 710 #  endif
 711 _GL_FUNCDECL_RPL (getgroups, int, (int n, gid_t *groups));
 712 _GL_CXXALIAS_RPL (getgroups, int, (int n, gid_t *groups));
 713 # else
 714 #  if !@HAVE_GETGROUPS@
 715 _GL_FUNCDECL_SYS (getgroups, int, (int n, gid_t *groups));
 716 #  endif
 717 _GL_CXXALIAS_SYS (getgroups, int, (int n, gid_t *groups));
 718 # endif
 719 _GL_CXXALIASWARN (getgroups);
 720 #elif defined GNULIB_POSIXCHECK
 721 # undef getgroups
 722 # if HAVE_RAW_DECL_GETGROUPS
 723 _GL_WARN_ON_USE (getgroups, "getgroups is unportable - "
 724                  "use gnulib module getgroups for portability");
 725 # endif
 726 #endif
 727
 728
 729 #if @GNULIB_GETHOSTNAME@
 730 /* Return the standard host name of the machine.
 731    WARNING! The host name may or may not be fully qualified.
 732
 733    Put up to LEN bytes of the host name into NAME.
 734    Null terminate it if the name is shorter than LEN.
 735    If the host name is longer than LEN, set errno = EINVAL and return -1.
 736    Return 0 if successful, otherwise set errno and return -1.  */
 737 # if @UNISTD_H_HAVE_WINSOCK2_H@
 738 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 739 #   undef gethostname
 740 #   define gethostname rpl_gethostname
 741 #  endif
 742 _GL_FUNCDECL_RPL (gethostname, int, (char *name, size_t len)
 743                                     _GL_ARG_NONNULL ((1)));
 744 _GL_CXXALIAS_RPL (gethostname, int, (char *name, size_t len));
 745 # else
 746 #  if !@HAVE_GETHOSTNAME@
 747 _GL_FUNCDECL_SYS (gethostname, int, (char *name, size_t len)
 748                                     _GL_ARG_NONNULL ((1)));
 749 #  endif
 750 /* Need to cast, because on Solaris 10 and OSF/1 5.1 systems, the second
 751    parameter is
 752                                                       int len.  */
 753 _GL_CXXALIAS_SYS_CAST (gethostname, int, (char *name, size_t len));
 754 # endif
 755 _GL_CXXALIASWARN (gethostname);
 756 #elif @UNISTD_H_HAVE_WINSOCK2_H@
 757 # undef gethostname
 758 # define gethostname gethostname_used_without_requesting_gnulib_module_gethostname
 759 #elif defined GNULIB_POSIXCHECK
 760 # undef gethostname
 761 # if HAVE_RAW_DECL_GETHOSTNAME
 762 _GL_WARN_ON_USE (gethostname, "gethostname is unportable - "
 763                  "use gnulib module gethostname for portability");
 764 # endif
 765 #endif
 766
 767
 768 #if @GNULIB_GETLOGIN@
 769 /* Returns the user's login name, or NULL if it cannot be found.  Upon error,
 770    returns NULL with errno set.
 771
 772    See <http://www.opengroup.org/susv3xsh/getlogin.html>.
 773
 774    Most programs don't need to use this function, because the information is
 775    available through environment variables:
 776      ${LOGNAME-$USER}        on Unix platforms,
 777      $USERNAME               on native Windows platforms.
 778  */
 779 # if !@HAVE_GETLOGIN@
 780 _GL_FUNCDECL_SYS (getlogin, char *, (void));
 781 # endif
 782 _GL_CXXALIAS_SYS (getlogin, char *, (void));
 783 _GL_CXXALIASWARN (getlogin);
 784 #elif defined GNULIB_POSIXCHECK
 785 # undef getlogin
 786 # if HAVE_RAW_DECL_GETLOGIN
 787 _GL_WARN_ON_USE (getlogin, "getlogin is unportable - "
 788                  "use gnulib module getlogin for portability");
 789 # endif
 790 #endif
 791
 792
 793 #if @GNULIB_GETLOGIN_R@
 794 /* Copies the user's login name to NAME.
 795    The array pointed to by NAME has room for SIZE bytes.
 796
 797    Returns 0 if successful.  Upon error, an error number is returned, or -1 in
 798    the case that the login name cannot be found but no specific error is
 799    provided (this case is hopefully rare but is left open by the POSIX spec).
 800
 801    See <http://www.opengroup.org/susv3xsh/getlogin.html>.
 802
 803    Most programs don't need to use this function, because the information is
 804    available through environment variables:
 805      ${LOGNAME-$USER}        on Unix platforms,
 806      $USERNAME               on native Windows platforms.
 807  */
 808 # if @REPLACE_GETLOGIN_R@
 809 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 810 #   define getlogin_r rpl_getlogin_r
 811 #  endif
 812 _GL_FUNCDECL_RPL (getlogin_r, int, (char *name, size_t size)
 813                                    _GL_ARG_NONNULL ((1)));
 814 _GL_CXXALIAS_RPL (getlogin_r, int, (char *name, size_t size));
 815 # else
 816 #  if !@HAVE_DECL_GETLOGIN_R@
 817 _GL_FUNCDECL_SYS (getlogin_r, int, (char *name, size_t size)
 818                                    _GL_ARG_NONNULL ((1)));
 819 #  endif
 820 /* Need to cast, because on Solaris 10 systems, the second argument is
 821                                                      int size.  */
 822 _GL_CXXALIAS_SYS_CAST (getlogin_r, int, (char *name, size_t size));
 823 # endif
 824 _GL_CXXALIASWARN (getlogin_r);
 825 #elif defined GNULIB_POSIXCHECK
 826 # undef getlogin_r
 827 # if HAVE_RAW_DECL_GETLOGIN_R
 828 _GL_WARN_ON_USE (getlogin_r, "getlogin_r is unportable - "
 829                  "use gnulib module getlogin_r for portability");
 830 # endif
 831 #endif
 832
 833
 834 #if @GNULIB_GETPAGESIZE@
 835 # if @REPLACE_GETPAGESIZE@
 836 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 837 #   define getpagesize rpl_getpagesize
 838 #  endif
 839 _GL_FUNCDECL_RPL (getpagesize, int, (void));
 840 _GL_CXXALIAS_RPL (getpagesize, int, (void));
 841 # else
 842 #  if !@HAVE_GETPAGESIZE@
 843 #   if !defined getpagesize
 844 /* This is for POSIX systems.  */
 845 #    if !defined _gl_getpagesize && defined _SC_PAGESIZE
 846 #     if ! (defined __VMS && __VMS_VER < 70000000)
 847 #      define _gl_getpagesize() sysconf (_SC_PAGESIZE)
 848 #     endif
 849 #    endif
 850 /* This is for older VMS.  */
 851 #    if !defined _gl_getpagesize && defined __VMS
 852 #     ifdef __ALPHA
 853 #      define _gl_getpagesize() 8192
 854 #     else
 855 #      define _gl_getpagesize() 512
 856 #     endif
 857 #    endif
 858 /* This is for BeOS.  */
 859 #    if !defined _gl_getpagesize && @HAVE_OS_H@
 860 #     include <OS.h>
 861 #     if defined B_PAGE_SIZE
 862 #      define _gl_getpagesize() B_PAGE_SIZE
 863 #     endif
 864 #    endif
 865 /* This is for AmigaOS4.0.  */
 866 #    if !defined _gl_getpagesize && defined __amigaos4__
 867 #     define _gl_getpagesize() 2048
 868 #    endif
 869 /* This is for older Unix systems.  */
 870 #    if !defined _gl_getpagesize && @HAVE_SYS_PARAM_H@
 871 #     include <sys/param.h>
 872 #     ifdef EXEC_PAGESIZE
 873 #      define _gl_getpagesize() EXEC_PAGESIZE
 874 #     else
 875 #      ifdef NBPG
 876 #       ifndef CLSIZE
 877 #        define CLSIZE 1
 878 #       endif
 879 #       define _gl_getpagesize() (NBPG * CLSIZE)
 880 #      else
 881 #       ifdef NBPC
 882 #        define _gl_getpagesize() NBPC
 883 #       endif
 884 #      endif
 885 #     endif
 886 #    endif
 887 #    if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 888 #     define getpagesize() _gl_getpagesize ()
 889 #    else
 890 #     if !GNULIB_defined_getpagesize_function
 891 _GL_UNISTD_INLINE int
 892 getpagesize ()
 893 {
 894   return _gl_getpagesize ();
 895 }
 896 #      define GNULIB_defined_getpagesize_function 1
 897 #     endif
 898 #    endif
 899 #   endif
 900 #  endif
 901 /* Need to cast, because on Cygwin 1.5.x systems, the return type is size_t.  */
 902 _GL_CXXALIAS_SYS_CAST (getpagesize, int, (void));
 903 # endif
 904 # if @HAVE_DECL_GETPAGESIZE@
 905 _GL_CXXALIASWARN (getpagesize);
 906 # endif
 907 #elif defined GNULIB_POSIXCHECK
 908 # undef getpagesize
 909 # if HAVE_RAW_DECL_GETPAGESIZE
 910 _GL_WARN_ON_USE (getpagesize, "getpagesize is unportable - "
 911                  "use gnulib module getpagesize for portability");
 912 # endif
 913 #endif
 914
 915
 916 #if @GNULIB_GETUSERSHELL@
 917 /* Return the next valid login shell on the system, or NULL when the end of
 918    the list has been reached.  */
 919 # if !@HAVE_DECL_GETUSERSHELL@
 920 _GL_FUNCDECL_SYS (getusershell, char *, (void));
 921 # endif
 922 _GL_CXXALIAS_SYS (getusershell, char *, (void));
 923 _GL_CXXALIASWARN (getusershell);
 924 #elif defined GNULIB_POSIXCHECK
 925 # undef getusershell
 926 # if HAVE_RAW_DECL_GETUSERSHELL
 927 _GL_WARN_ON_USE (getusershell, "getusershell is unportable - "
 928                  "use gnulib module getusershell for portability");
 929 # endif
 930 #endif
 931
 932 #if @GNULIB_GETUSERSHELL@
 933 /* Rewind to pointer that is advanced at each getusershell() call.  */
 934 # if !@HAVE_DECL_GETUSERSHELL@
 935 _GL_FUNCDECL_SYS (setusershell, void, (void));
 936 # endif
 937 _GL_CXXALIAS_SYS (setusershell, void, (void));
 938 _GL_CXXALIASWARN (setusershell);
 939 #elif defined GNULIB_POSIXCHECK
 940 # undef setusershell
 941 # if HAVE_RAW_DECL_SETUSERSHELL
 942 _GL_WARN_ON_USE (setusershell, "setusershell is unportable - "
 943                  "use gnulib module getusershell for portability");
 944 # endif
 945 #endif
 946
 947 #if @GNULIB_GETUSERSHELL@
 948 /* Free the pointer that is advanced at each getusershell() call and
 949    associated resources.  */
 950 # if !@HAVE_DECL_GETUSERSHELL@
 951 _GL_FUNCDECL_SYS (endusershell, void, (void));
 952 # endif
 953 _GL_CXXALIAS_SYS (endusershell, void, (void));
 954 _GL_CXXALIASWARN (endusershell);
 955 #elif defined GNULIB_POSIXCHECK
 956 # undef endusershell
 957 # if HAVE_RAW_DECL_ENDUSERSHELL
 958 _GL_WARN_ON_USE (endusershell, "endusershell is unportable - "
 959                  "use gnulib module getusershell for portability");
 960 # endif
 961 #endif
 962
 963
 964 #if @GNULIB_GROUP_MEMBER@
 965 /* Determine whether group id is in calling user's group list.  */
 966 # if !@HAVE_GROUP_MEMBER@
 967 _GL_FUNCDECL_SYS (group_member, int, (gid_t gid));
 968 # endif
 969 _GL_CXXALIAS_SYS (group_member, int, (gid_t gid));
 970 _GL_CXXALIASWARN (group_member);
 971 #elif defined GNULIB_POSIXCHECK
 972 # undef group_member
 973 # if HAVE_RAW_DECL_GROUP_MEMBER
 974 _GL_WARN_ON_USE (group_member, "group_member is unportable - "
 975                  "use gnulib module group-member for portability");
 976 # endif
 977 #endif
 978
 979
 980 #if @GNULIB_ISATTY@
 981 # if @REPLACE_ISATTY@
 982 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 983 #   undef isatty
 984 #   define isatty rpl_isatty
 985 #  endif
 986 _GL_FUNCDECL_RPL (isatty, int, (int fd));
 987 _GL_CXXALIAS_RPL (isatty, int, (int fd));
 988 # else
 989 _GL_CXXALIAS_SYS (isatty, int, (int fd));
 990 # endif
 991 _GL_CXXALIASWARN (isatty);
 992 #elif defined GNULIB_POSIXCHECK
 993 # undef isatty
 994 # if HAVE_RAW_DECL_ISATTY
 995 _GL_WARN_ON_USE (isatty, "isatty has portability problems on native Windows - "
 996                  "use gnulib module isatty for portability");
 997 # endif
 998 #endif
 999
1000
1001 #if @GNULIB_LCHOWN@
1002 /* Change the owner of FILE to UID (if UID is not -1) and the group of FILE
1003    to GID (if GID is not -1).  Do not follow symbolic links.
1004    Return 0 if successful, otherwise -1 and errno set.
1005    See the POSIX:2008 specification
1006    <http://pubs.opengroup.org/onlinepubs/9699919799/functions/lchown.html>.  */
1007 # if @REPLACE_LCHOWN@
1008 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1009 #   undef lchown
1010 #   define lchown rpl_lchown
1011 #  endif
1012 _GL_FUNCDECL_RPL (lchown, int, (char const *file, uid_t owner, gid_t group)
1013                                _GL_ARG_NONNULL ((1)));
1014 _GL_CXXALIAS_RPL (lchown, int, (char const *file, uid_t owner, gid_t group));
1015 # else
1016 #  if !@HAVE_LCHOWN@
1017 _GL_FUNCDECL_SYS (lchown, int, (char const *file, uid_t owner, gid_t group)
1018                                _GL_ARG_NONNULL ((1)));
1019 #  endif
1020 _GL_CXXALIAS_SYS (lchown, int, (char const *file, uid_t owner, gid_t group));
1021 # endif
1022 _GL_CXXALIASWARN (lchown);
1023 #elif defined GNULIB_POSIXCHECK
1024 # undef lchown
1025 # if HAVE_RAW_DECL_LCHOWN
1026 _GL_WARN_ON_USE (lchown, "lchown is unportable to pre-POSIX.1-2001 systems - "
1027                  "use gnulib module lchown for portability");
1028 # endif
1029 #endif
1030
1031
1032 #if @GNULIB_LINK@
1033 /* Create a new hard link for an existing file.
1034    Return 0 if successful, otherwise -1 and errno set.
1035    See POSIX:2008 specification
1036    <http://pubs.opengroup.org/onlinepubs/9699919799/functions/link.html>.  */
1037 # if @REPLACE_LINK@
1038 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1039 #   define link rpl_link
1040 #  endif
1041 _GL_FUNCDECL_RPL (link, int, (const char *path1, const char *path2)
1042                              _GL_ARG_NONNULL ((1, 2)));
1043 _GL_CXXALIAS_RPL (link, int, (const char *path1, const char *path2));
1044 # else
1045 #  if !@HAVE_LINK@
1046 _GL_FUNCDECL_SYS (link, int, (const char *path1, const char *path2)
1047                              _GL_ARG_NONNULL ((1, 2)));
1048 #  endif
1049 _GL_CXXALIAS_SYS (link, int, (const char *path1, const char *path2));
1050 # endif
1051 _GL_CXXALIASWARN (link);
1052 #elif defined GNULIB_POSIXCHECK
1053 # undef link
1054 # if HAVE_RAW_DECL_LINK
1055 _GL_WARN_ON_USE (link, "link is unportable - "
1056                  "use gnulib module link for portability");
1057 # endif
1058 #endif
1059
1060
1061 #if @GNULIB_LINKAT@
1062 /* Create a new hard link for an existing file, relative to two
1063    directories.  FLAG controls whether symlinks are followed.
1064    Return 0 if successful, otherwise -1 and errno set.  */
1065 # if @REPLACE_LINKAT@
1066 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1067 #   undef linkat
1068 #   define linkat rpl_linkat
1069 #  endif
1070 _GL_FUNCDECL_RPL (linkat, int,
1071                   (int fd1, const char *path1, int fd2, const char *path2,
1072                    int flag)
1073                   _GL_ARG_NONNULL ((2, 4)));
1074 _GL_CXXALIAS_RPL (linkat, int,
1075                   (int fd1, const char *path1, int fd2, const char *path2,
1076                    int flag));
1077 # else
1078 #  if !@HAVE_LINKAT@
1079 _GL_FUNCDECL_SYS (linkat, int,
1080                   (int fd1, const char *path1, int fd2, const char *path2,
1081                    int flag)
1082                   _GL_ARG_NONNULL ((2, 4)));
1083 #  endif
1084 _GL_CXXALIAS_SYS (linkat, int,
1085                   (int fd1, const char *path1, int fd2, const char *path2,
1086                    int flag));
1087 # endif
1088 _GL_CXXALIASWARN (linkat);
1089 #elif defined GNULIB_POSIXCHECK
1090 # undef linkat
1091 # if HAVE_RAW_DECL_LINKAT
1092 _GL_WARN_ON_USE (linkat, "linkat is unportable - "
1093                  "use gnulib module linkat for portability");
1094 # endif
1095 #endif
1096
1097
1098 #if @GNULIB_LSEEK@
1099 /* Set the offset of FD relative to SEEK_SET, SEEK_CUR, or SEEK_END.
1100    Return the new offset if successful, otherwise -1 and errno set.
1101    See the POSIX:2008 specification
1102    <http://pubs.opengroup.org/onlinepubs/9699919799/functions/lseek.html>.  */
1103 # if @REPLACE_LSEEK@
1104 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1105 #   define lseek rpl_lseek
1106 #  endif
1107 _GL_FUNCDECL_RPL (lseek, off_t, (int fd, off_t offset, int whence));
1108 _GL_CXXALIAS_RPL (lseek, off_t, (int fd, off_t offset, int whence));
1109 # else
1110 _GL_CXXALIAS_SYS (lseek, off_t, (int fd, off_t offset, int whence));
1111 # endif
1112 _GL_CXXALIASWARN (lseek);
1113 #elif defined GNULIB_POSIXCHECK
1114 # undef lseek
1115 # if HAVE_RAW_DECL_LSEEK
1116 _GL_WARN_ON_USE (lseek, "lseek does not fail with ESPIPE on pipes on some "
1117                  "systems - use gnulib module lseek for portability");
1118 # endif
1119 #endif
1120
1121
1122 #if @GNULIB_PIPE@
1123 /* Create a pipe, defaulting to O_BINARY mode.
1124    Store the read-end as fd[0] and the write-end as fd[1].
1125    Return 0 upon success, or -1 with errno set upon failure.  */
1126 # if !@HAVE_PIPE@
1127 _GL_FUNCDECL_SYS (pipe, int, (int fd[2]) _GL_ARG_NONNULL ((1)));
1128 # endif
1129 _GL_CXXALIAS_SYS (pipe, int, (int fd[2]));
1130 _GL_CXXALIASWARN (pipe);
1131 #elif defined GNULIB_POSIXCHECK
1132 # undef pipe
1133 # if HAVE_RAW_DECL_PIPE
1134 _GL_WARN_ON_USE (pipe, "pipe is unportable - "
1135                  "use gnulib module pipe-posix for portability");
1136 # endif
1137 #endif
1138
1139
1140 #if @GNULIB_PIPE2@
1141 /* Create a pipe, applying the given flags when opening the read-end of the
1142    pipe and the write-end of the pipe.
1143    The flags are a bitmask, possibly including O_CLOEXEC (defined in <fcntl.h>)
1144    and O_TEXT, O_BINARY (defined in "binary-io.h").
1145    Store the read-end as fd[0] and the write-end as fd[1].
1146    Return 0 upon success, or -1 with errno set upon failure.
1147    See also the Linux man page at
1148    <http://www.kernel.org/doc/man-pages/online/pages/man2/pipe2.2.html>.  */
1149 # if @HAVE_PIPE2@
1150 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1151 #   define pipe2 rpl_pipe2
1152 #  endif
1153 _GL_FUNCDECL_RPL (pipe2, int, (int fd[2], int flags) _GL_ARG_NONNULL ((1)));
1154 _GL_CXXALIAS_RPL (pipe2, int, (int fd[2], int flags));
1155 # else
1156 _GL_FUNCDECL_SYS (pipe2, int, (int fd[2], int flags) _GL_ARG_NONNULL ((1)));
1157 _GL_CXXALIAS_SYS (pipe2, int, (int fd[2], int flags));
1158 # endif
1159 _GL_CXXALIASWARN (pipe2);
1160 #elif defined GNULIB_POSIXCHECK
1161 # undef pipe2
1162 # if HAVE_RAW_DECL_PIPE2
1163 _GL_WARN_ON_USE (pipe2, "pipe2 is unportable - "
1164                  "use gnulib module pipe2 for portability");
1165 # endif
1166 #endif
1167
1168
1169 #if @GNULIB_PREAD@
1170 /* Read at most BUFSIZE bytes from FD into BUF, starting at OFFSET.
1171    Return the number of bytes placed into BUF if successful, otherwise
1172    set errno and return -1.  0 indicates EOF.
1173    See the POSIX:2008 specification
1174    <http://pubs.opengroup.org/onlinepubs/9699919799/functions/pread.html>.  */
1175 # if @REPLACE_PREAD@
1176 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1177 #   undef pread
1178 #   define pread rpl_pread
1179 #  endif
1180 _GL_FUNCDECL_RPL (pread, ssize_t,
1181                   (int fd, void *buf, size_t bufsize, off_t offset)
1182                   _GL_ARG_NONNULL ((2)));
1183 _GL_CXXALIAS_RPL (pread, ssize_t,
1184                   (int fd, void *buf, size_t bufsize, off_t offset));
1185 # else
1186 #  if !@HAVE_PREAD@
1187 _GL_FUNCDECL_SYS (pread, ssize_t,
1188                   (int fd, void *buf, size_t bufsize, off_t offset)
1189                   _GL_ARG_NONNULL ((2)));
1190 #  endif
1191 _GL_CXXALIAS_SYS (pread, ssize_t,
1192                   (int fd, void *buf, size_t bufsize, off_t offset));
1193 # endif
1194 _GL_CXXALIASWARN (pread);
1195 #elif defined GNULIB_POSIXCHECK
1196 # undef pread
1197 # if HAVE_RAW_DECL_PREAD
1198 _GL_WARN_ON_USE (pread, "pread is unportable - "
1199                  "use gnulib module pread for portability");
1200 # endif
1201 #endif
1202
1203
1204 #if @GNULIB_PWRITE@
1205 /* Write at most BUFSIZE bytes from BUF into FD, starting at OFFSET.
1206    Return the number of bytes written if successful, otherwise
1207    set errno and return -1.  0 indicates nothing written.  See the
1208    POSIX:2008 specification
1209    <http://pubs.opengroup.org/onlinepubs/9699919799/functions/pwrite.html>.  */
1210 # if @REPLACE_PWRITE@
1211 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1212 #   undef pwrite
1213 #   define pwrite rpl_pwrite
1214 #  endif
1215 _GL_FUNCDECL_RPL (pwrite, ssize_t,
1216                   (int fd, const void *buf, size_t bufsize, off_t offset)
1217                   _GL_ARG_NONNULL ((2)));
1218 _GL_CXXALIAS_RPL (pwrite, ssize_t,
1219                   (int fd, const void *buf, size_t bufsize, off_t offset));
1220 # else
1221 #  if !@HAVE_PWRITE@
1222 _GL_FUNCDECL_SYS (pwrite, ssize_t,
1223                   (int fd, const void *buf, size_t bufsize, off_t offset)
1224                   _GL_ARG_NONNULL ((2)));
1225 #  endif
1226 _GL_CXXALIAS_SYS (pwrite, ssize_t,
1227                   (int fd, const void *buf, size_t bufsize, off_t offset));
1228 # endif
1229 _GL_CXXALIASWARN (pwrite);
1230 #elif defined GNULIB_POSIXCHECK
1231 # undef pwrite
1232 # if HAVE_RAW_DECL_PWRITE
1233 _GL_WARN_ON_USE (pwrite, "pwrite is unportable - "
1234                  "use gnulib module pwrite for portability");
1235 # endif
1236 #endif
1237
1238
1239 #if @GNULIB_READ@
1240 /* Read up to COUNT bytes from file descriptor FD into the buffer starting
1241    at BUF.  See the POSIX:2008 specification
1242    <http://pubs.opengroup.org/onlinepubs/9699919799/functions/read.html>.  */
1243 # if @REPLACE_READ@
1244 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1245 #   undef read
1246 #   define read rpl_read
1247 #  endif
1248 _GL_FUNCDECL_RPL (read, ssize_t, (int fd, void *buf, size_t count)
1249                                  _GL_ARG_NONNULL ((2)));
1250 _GL_CXXALIAS_RPL (read, ssize_t, (int fd, void *buf, size_t count));
1251 # else
1252 /* Need to cast, because on mingw, the third parameter is
1253                                                           unsigned int count
1254    and the return type is 'int'.  */
1255 _GL_CXXALIAS_SYS_CAST (read, ssize_t, (int fd, void *buf, size_t count));
1256 # endif
1257 _GL_CXXALIASWARN (read);
1258 #endif
1259
1260
1261 #if @GNULIB_READLINK@
1262 /* Read the contents of the symbolic link FILE and place the first BUFSIZE
1263    bytes of it into BUF.  Return the number of bytes placed into BUF if
1264    successful, otherwise -1 and errno set.
1265    See the POSIX:2008 specification
1266    <http://pubs.opengroup.org/onlinepubs/9699919799/functions/readlink.html>.  */
1267 # if @REPLACE_READLINK@
1268 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1269 #   define readlink rpl_readlink
1270 #  endif
1271 _GL_FUNCDECL_RPL (readlink, ssize_t,
1272                   (const char *file, char *buf, size_t bufsize)
1273                   _GL_ARG_NONNULL ((1, 2)));
1274 _GL_CXXALIAS_RPL (readlink, ssize_t,
1275                   (const char *file, char *buf, size_t bufsize));
1276 # else
1277 #  if !@HAVE_READLINK@
1278 _GL_FUNCDECL_SYS (readlink, ssize_t,
1279                   (const char *file, char *buf, size_t bufsize)
1280                   _GL_ARG_NONNULL ((1, 2)));
1281 #  endif
1282 _GL_CXXALIAS_SYS (readlink, ssize_t,
1283                   (const char *file, char *buf, size_t bufsize));
1284 # endif
1285 _GL_CXXALIASWARN (readlink);
1286 #elif defined GNULIB_POSIXCHECK
1287 # undef readlink
1288 # if HAVE_RAW_DECL_READLINK
1289 _GL_WARN_ON_USE (readlink, "readlink is unportable - "
1290                  "use gnulib module readlink for portability");
1291 # endif
1292 #endif
1293
1294
1295 #if @GNULIB_READLINKAT@
1296 # if @REPLACE_READLINKAT@
1297 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1298 #   define readlinkat rpl_readlinkat
1299 #  endif
1300 _GL_FUNCDECL_RPL (readlinkat, ssize_t,
1301                   (int fd, char const *file, char *buf, size_t len)
1302                   _GL_ARG_NONNULL ((2, 3)));
1303 _GL_CXXALIAS_RPL (readlinkat, ssize_t,
1304                   (int fd, char const *file, char *buf, size_t len));
1305 # else
1306 #  if !@HAVE_READLINKAT@
1307 _GL_FUNCDECL_SYS (readlinkat, ssize_t,
1308                   (int fd, char const *file, char *buf, size_t len)
1309                   _GL_ARG_NONNULL ((2, 3)));
1310 #  endif
1311 _GL_CXXALIAS_SYS (readlinkat, ssize_t,
1312                   (int fd, char const *file, char *buf, size_t len));
1313 # endif
1314 _GL_CXXALIASWARN (readlinkat);
1315 #elif defined GNULIB_POSIXCHECK
1316 # undef readlinkat
1317 # if HAVE_RAW_DECL_READLINKAT
1318 _GL_WARN_ON_USE (readlinkat, "readlinkat is not portable - "
1319                  "use gnulib module readlinkat for portability");
1320 # endif
1321 #endif
1322
1323
1324 #if @GNULIB_RMDIR@
1325 /* Remove the directory DIR.  */
1326 # if @REPLACE_RMDIR@
1327 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1328 #   define rmdir rpl_rmdir
1329 #  endif
1330 _GL_FUNCDECL_RPL (rmdir, int, (char const *name) _GL_ARG_NONNULL ((1)));
1331 _GL_CXXALIAS_RPL (rmdir, int, (char const *name));
1332 # else
1333 _GL_CXXALIAS_SYS (rmdir, int, (char const *name));
1334 # endif
1335 _GL_CXXALIASWARN (rmdir);
1336 #elif defined GNULIB_POSIXCHECK
1337 # undef rmdir
1338 # if HAVE_RAW_DECL_RMDIR
1339 _GL_WARN_ON_USE (rmdir, "rmdir is unportable - "
1340                  "use gnulib module rmdir for portability");
1341 # endif
1342 #endif
1343
1344
1345 #if @GNULIB_SETHOSTNAME@
1346 /* Set the host name of the machine.
1347    The host name may or may not be fully qualified.
1348
1349    Put LEN bytes of NAME into the host name.
1350    Return 0 if successful, otherwise, set errno and return -1.
1351
1352    Platforms with no ability to set the hostname return -1 and set
1353    errno = ENOSYS.  */
1354 # if !@HAVE_SETHOSTNAME@ || !@HAVE_DECL_SETHOSTNAME@
1355 _GL_FUNCDECL_SYS (sethostname, int, (const char *name, size_t len)
1356                                     _GL_ARG_NONNULL ((1)));
1357 # endif
1358 /* Need to cast, because on Solaris 11 2011-10, Mac OS X 10.5, IRIX 6.5
1359    and FreeBSD 6.4 the second parameter is int.  On Solaris 11
1360    2011-10, the first parameter is not const.  */
1361 _GL_CXXALIAS_SYS_CAST (sethostname, int, (const char *name, size_t len));
1362 _GL_CXXALIASWARN (sethostname);
1363 #elif defined GNULIB_POSIXCHECK
1364 # undef sethostname
1365 # if HAVE_RAW_DECL_SETHOSTNAME
1366 _GL_WARN_ON_USE (sethostname, "sethostname is unportable - "
1367                  "use gnulib module sethostname for portability");
1368 # endif
1369 #endif
1370
1371
1372 #if @GNULIB_SLEEP@
1373 /* Pause the execution of the current thread for N seconds.
1374    Returns the number of seconds left to sleep.
1375    See the POSIX:2008 specification
1376    <http://pubs.opengroup.org/onlinepubs/9699919799/functions/sleep.html>.  */
1377 # if @REPLACE_SLEEP@
1378 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1379 #   undef sleep
1380 #   define sleep rpl_sleep
1381 #  endif
1382 _GL_FUNCDECL_RPL (sleep, unsigned int, (unsigned int n));
1383 _GL_CXXALIAS_RPL (sleep, unsigned int, (unsigned int n));
1384 # else
1385 #  if !@HAVE_SLEEP@
1386 _GL_FUNCDECL_SYS (sleep, unsigned int, (unsigned int n));
1387 #  endif
1388 _GL_CXXALIAS_SYS (sleep, unsigned int, (unsigned int n));
1389 # endif
1390 _GL_CXXALIASWARN (sleep);
1391 #elif defined GNULIB_POSIXCHECK
1392 # undef sleep
1393 # if HAVE_RAW_DECL_SLEEP
1394 _GL_WARN_ON_USE (sleep, "sleep is unportable - "
1395                  "use gnulib module sleep for portability");
1396 # endif
1397 #endif
1398
1399
1400 #if @GNULIB_SYMLINK@
1401 # if @REPLACE_SYMLINK@
1402 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1403 #   undef symlink
1404 #   define symlink rpl_symlink
1405 #  endif
1406 _GL_FUNCDECL_RPL (symlink, int, (char const *contents, char const *file)
1407                                 _GL_ARG_NONNULL ((1, 2)));
1408 _GL_CXXALIAS_RPL (symlink, int, (char const *contents, char const *file));
1409 # else
1410 #  if !@HAVE_SYMLINK@
1411 _GL_FUNCDECL_SYS (symlink, int, (char const *contents, char const *file)
1412                                 _GL_ARG_NONNULL ((1, 2)));
1413 #  endif
1414 _GL_CXXALIAS_SYS (symlink, int, (char const *contents, char const *file));
1415 # endif
1416 _GL_CXXALIASWARN (symlink);
1417 #elif defined GNULIB_POSIXCHECK
1418 # undef symlink
1419 # if HAVE_RAW_DECL_SYMLINK
1420 _GL_WARN_ON_USE (symlink, "symlink is not portable - "
1421                  "use gnulib module symlink for portability");
1422 # endif
1423 #endif
1424
1425
1426 #if @GNULIB_SYMLINKAT@
1427 # if @REPLACE_SYMLINKAT@
1428 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1429 #   undef symlinkat
1430 #   define symlinkat rpl_symlinkat
1431 #  endif
1432 _GL_FUNCDECL_RPL (symlinkat, int,
1433                   (char const *contents, int fd, char const *file)
1434                   _GL_ARG_NONNULL ((1, 3)));
1435 _GL_CXXALIAS_RPL (symlinkat, int,
1436                   (char const *contents, int fd, char const *file));
1437 # else
1438 #  if !@HAVE_SYMLINKAT@
1439 _GL_FUNCDECL_SYS (symlinkat, int,
1440                   (char const *contents, int fd, char const *file)
1441                   _GL_ARG_NONNULL ((1, 3)));
1442 #  endif
1443 _GL_CXXALIAS_SYS (symlinkat, int,
1444                   (char const *contents, int fd, char const *file));
1445 # endif
1446 _GL_CXXALIASWARN (symlinkat);
1447 #elif defined GNULIB_POSIXCHECK
1448 # undef symlinkat
1449 # if HAVE_RAW_DECL_SYMLINKAT
1450 _GL_WARN_ON_USE (symlinkat, "symlinkat is not portable - "
1451                  "use gnulib module symlinkat for portability");
1452 # endif
1453 #endif
1454
1455
1456 #if @GNULIB_TTYNAME_R@
1457 /* Store at most BUFLEN characters of the pathname of the terminal FD is
1458    open on in BUF.  Return 0 on success, otherwise an error number.  */
1459 # if @REPLACE_TTYNAME_R@
1460 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1461 #   undef ttyname_r
1462 #   define ttyname_r rpl_ttyname_r
1463 #  endif
1464 _GL_FUNCDECL_RPL (ttyname_r, int,
1465                   (int fd, char *buf, size_t buflen) _GL_ARG_NONNULL ((2)));
1466 _GL_CXXALIAS_RPL (ttyname_r, int,
1467                   (int fd, char *buf, size_t buflen));
1468 # else
1469 #  if !@HAVE_DECL_TTYNAME_R@
1470 _GL_FUNCDECL_SYS (ttyname_r, int,
1471                   (int fd, char *buf, size_t buflen) _GL_ARG_NONNULL ((2)));
1472 #  endif
1473 _GL_CXXALIAS_SYS (ttyname_r, int,
1474                   (int fd, char *buf, size_t buflen));
1475 # endif
1476 _GL_CXXALIASWARN (ttyname_r);
1477 #elif defined GNULIB_POSIXCHECK
1478 # undef ttyname_r
1479 # if HAVE_RAW_DECL_TTYNAME_R
1480 _GL_WARN_ON_USE (ttyname_r, "ttyname_r is not portable - "
1481                  "use gnulib module ttyname_r for portability");
1482 # endif
1483 #endif
1484
1485
1486 #if @GNULIB_UNLINK@
1487 # if @REPLACE_UNLINK@
1488 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1489 #   undef unlink
1490 #   define unlink rpl_unlink
1491 #  endif
1492 _GL_FUNCDECL_RPL (unlink, int, (char const *file) _GL_ARG_NONNULL ((1)));
1493 _GL_CXXALIAS_RPL (unlink, int, (char const *file));
1494 # else
1495 _GL_CXXALIAS_SYS (unlink, int, (char const *file));
1496 # endif
1497 _GL_CXXALIASWARN (unlink);
1498 #elif defined GNULIB_POSIXCHECK
1499 # undef unlink
1500 # if HAVE_RAW_DECL_UNLINK
1501 _GL_WARN_ON_USE (unlink, "unlink is not portable - "
1502                  "use gnulib module unlink for portability");
1503 # endif
1504 #endif
1505
1506
1507 #if @GNULIB_UNLINKAT@
1508 # if @REPLACE_UNLINKAT@
1509 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1510 #   undef unlinkat
1511 #   define unlinkat rpl_unlinkat
1512 #  endif
1513 _GL_FUNCDECL_RPL (unlinkat, int, (int fd, char const *file, int flag)
1514                                  _GL_ARG_NONNULL ((2)));
1515 _GL_CXXALIAS_RPL (unlinkat, int, (int fd, char const *file, int flag));
1516 # else
1517 #  if !@HAVE_UNLINKAT@
1518 _GL_FUNCDECL_SYS (unlinkat, int, (int fd, char const *file, int flag)
1519                                  _GL_ARG_NONNULL ((2)));
1520 #  endif
1521 _GL_CXXALIAS_SYS (unlinkat, int, (int fd, char const *file, int flag));
1522 # endif
1523 _GL_CXXALIASWARN (unlinkat);
1524 #elif defined GNULIB_POSIXCHECK
1525 # undef unlinkat
1526 # if HAVE_RAW_DECL_UNLINKAT
1527 _GL_WARN_ON_USE (unlinkat, "unlinkat is not portable - "
1528                  "use gnulib module openat for portability");
1529 # endif
1530 #endif
1531
1532
1533 #if @GNULIB_USLEEP@
1534 /* Pause the execution of the current thread for N microseconds.
1535    Returns 0 on completion, or -1 on range error.
1536    See the POSIX:2001 specification
1537    <http://www.opengroup.org/susv3xsh/usleep.html>.  */
1538 # if @REPLACE_USLEEP@
1539 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1540 #   undef usleep
1541 #   define usleep rpl_usleep
1542 #  endif
1543 _GL_FUNCDECL_RPL (usleep, int, (useconds_t n));
1544 _GL_CXXALIAS_RPL (usleep, int, (useconds_t n));
1545 # else
1546 #  if !@HAVE_USLEEP@
1547 _GL_FUNCDECL_SYS (usleep, int, (useconds_t n));
1548 #  endif
1549 _GL_CXXALIAS_SYS (usleep, int, (useconds_t n));
1550 # endif
1551 _GL_CXXALIASWARN (usleep);
1552 #elif defined GNULIB_POSIXCHECK
1553 # undef usleep
1554 # if HAVE_RAW_DECL_USLEEP
1555 _GL_WARN_ON_USE (usleep, "usleep is unportable - "
1556                  "use gnulib module usleep for portability");
1557 # endif
1558 #endif
1559
1560
1561 #if @GNULIB_WRITE@
1562 /* Write up to COUNT bytes starting at BUF to file descriptor FD.
1563    See the POSIX:2008 specification
1564    <http://pubs.opengroup.org/onlinepubs/9699919799/functions/write.html>.  */
1565 # if @REPLACE_WRITE@
1566 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1567 #   undef write
1568 #   define write rpl_write
1569 #  endif
1570 _GL_FUNCDECL_RPL (write, ssize_t, (int fd, const void *buf, size_t count)
1571                                   _GL_ARG_NONNULL ((2)));
1572 _GL_CXXALIAS_RPL (write, ssize_t, (int fd, const void *buf, size_t count));
1573 # else
1574 /* Need to cast, because on mingw, the third parameter is
1575                                                              unsigned int count
1576    and the return type is 'int'.  */
1577 _GL_CXXALIAS_SYS_CAST (write, ssize_t, (int fd, const void *buf, size_t count));
1578 # endif
1579 _GL_CXXALIASWARN (write);
1580 #endif
1581
1582 _GL_INLINE_HEADER_END
1583
1584 #endif /* _@GUARD_PREFIX@_UNISTD_H */
1585 #endif /* _GL_INCLUDING_UNISTD_H */
1586 #endif /* _@GUARD_PREFIX@_UNISTD_H */