lib/unistd.in.h

   1 /* Substitute for and wrapper around <unistd.h>.
   2    Copyright (C) 2003-2011 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 Lesser General Public License as published by
   6    the Free Software Foundation; either version 2, 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 Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public License
  15    along with this program; if not, write to the Free Software Foundation,
  16    Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */
  17
  18 #if __GNUC__ >= 3
  19 @PRAGMA_SYSTEM_HEADER@
  20 #endif
  21 @PRAGMA_COLUMNS@
  22
  23 /* Special invocation convention:
  24    - On mingw, several headers, including <winsock2.h>, include <unistd.h>,
  25      but we need to ensure that both the system <unistd.h> and <winsock2.h>
  26      are completely included before we replace gethostname.  */
  27 #if @GNULIB_GETHOSTNAME@ && @UNISTD_H_HAVE_WINSOCK2_H@ \
  28   && !defined _GL_WINSOCK2_H_WITNESS && defined _WINSOCK2_H
  29 /* <unistd.h> is being indirectly included for the first time from
  30    <winsock2.h>; avoid declaring any overrides.  */
  31 # if @HAVE_UNISTD_H@
  32 #  @INCLUDE_NEXT@ @NEXT_UNISTD_H@
  33 # else
  34 #  error unexpected; report this to bug-gnulib@gnu.org
  35 # endif
  36 # define _GL_WINSOCK2_H_WITNESS
  37
  38 /* Normal invocation.  */
  39 #elif !defined _@GUARD_PREFIX@_UNISTD_H
  40
  41 /* The include_next requires a split double-inclusion guard.  */
  42 #if @HAVE_UNISTD_H@
  43 # @INCLUDE_NEXT@ @NEXT_UNISTD_H@
  44 #endif
  45
  46 /* Get all possible declarations of gethostname().  */
  47 #if @GNULIB_GETHOSTNAME@ && @UNISTD_H_HAVE_WINSOCK2_H@ \
  48   && !defined _GL_INCLUDING_WINSOCK2_H
  49 # define _GL_INCLUDING_WINSOCK2_H
  50 # include <winsock2.h>
  51 # undef _GL_INCLUDING_WINSOCK2_H
  52 #endif
  53
  54 #if !defined _@GUARD_PREFIX@_UNISTD_H && !defined _GL_INCLUDING_WINSOCK2_H
  55 #define _@GUARD_PREFIX@_UNISTD_H
  56
  57 /* NetBSD 5.0 mis-defines NULL.  Also get size_t.  */
  58 #include <stddef.h>
  59
  60 /* mingw doesn't define the SEEK_* or *_FILENO macros in <unistd.h>.  */
  61 /* Cygwin 1.7.1 declares symlinkat in <stdio.h>, not in <unistd.h>.  */
  62 /* But avoid namespace pollution on glibc systems.  */
  63 #if (!(defined SEEK_CUR && defined SEEK_END && defined SEEK_SET) \
  64      || ((@GNULIB_SYMLINKAT@ || defined GNULIB_POSIXCHECK) \
  65          && defined __CYGWIN__)) \
  66     && ! defined __GLIBC__
  67 # include <stdio.h>
  68 #endif
  69
  70 /* Cygwin 1.7.1 declares unlinkat in <fcntl.h>, not in <unistd.h>.  */
  71 /* But avoid namespace pollution on glibc systems.  */
  72 #if (@GNULIB_UNLINKAT@ || defined GNULIB_POSIXCHECK) && defined __CYGWIN__ \
  73     && ! defined __GLIBC__
  74 # include <fcntl.h>
  75 #endif
  76
  77 /* mingw fails to declare _exit in <unistd.h>.  */
  78 /* mingw, MSVC, BeOS, Haiku declare environ in <stdlib.h>, not in
  79    <unistd.h>.  */
  80 /* Solaris declares getcwd not only in <unistd.h> but also in <stdlib.h>.  */
  81 /* But avoid namespace pollution on glibc systems.  */
  82 #ifndef __GLIBC__
  83 # include <stdlib.h>
  84 #endif
  85
  86 /* Native Windows platforms declare chdir, getcwd, rmdir in
  87    <io.h> and/or <direct.h>, not in <unistd.h>.  */
  88 #if ((@GNULIB_CHDIR@ || @GNULIB_GETCWD@ || @GNULIB_RMDIR@ \
  89       || defined GNULIB_POSIXCHECK) \
  90      && ((defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__))
  91 # include <io.h>     /* mingw32, mingw64 */
  92 # include <direct.h> /* mingw64, MSVC 9 */
  93 #endif
  94
  95 /* AIX and OSF/1 5.1 declare getdomainname in <netdb.h>, not in <unistd.h>.
  96    NonStop Kernel declares gethostname in <netdb.h>, not in <unistd.h>.  */
  97 /* But avoid namespace pollution on glibc systems.  */
  98 #if ((@GNULIB_GETDOMAINNAME@ && (defined _AIX || defined __osf__)) \
  99      || (@GNULIB_GETHOSTNAME@ && defined __TANDEM)) \
 100     && !defined __GLIBC__
 101 # include <netdb.h>
 102 #endif
 103
 104 /* MSVC defines off_t in <sys/types.h>.  */
 105 #if !@HAVE_UNISTD_H@
 106 /* Get off_t.  */
 107 # include <sys/types.h>
 108 #endif
 109
 110 #if (@GNULIB_READ@ || @GNULIB_WRITE@ \
 111      || @GNULIB_READLINK@ || @GNULIB_READLINKAT@ \
 112      || @GNULIB_PREAD@ || @GNULIB_PWRITE@ || defined GNULIB_POSIXCHECK)
 113 /* Get ssize_t.  */
 114 # include <sys/types.h>
 115 #endif
 116
 117 /* Get getopt(), optarg, optind, opterr, optopt.
 118    But avoid namespace pollution on glibc systems.  */
 119 #if @GNULIB_UNISTD_H_GETOPT@ && !defined __GLIBC__ && !defined _GL_SYSTEM_GETOPT
 120 # include <getopt.h>
 121 #endif
 122
 123 /* The definitions of _GL_FUNCDECL_RPL etc. are copied here.  */
 124
 125 /* The definition of _GL_ARG_NONNULL is copied here.  */
 126
 127 /* The definition of _GL_WARN_ON_USE is copied here.  */
 128
 129
 130 /* Hide some function declarations from <winsock2.h>.  */
 131
 132 #if @GNULIB_GETHOSTNAME@ && @UNISTD_H_HAVE_WINSOCK2_H@
 133 # if !defined _@GUARD_PREFIX@_SYS_SOCKET_H
 134 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 135 #   undef socket
 136 #   define socket              socket_used_without_including_sys_socket_h
 137 #   undef connect
 138 #   define connect             connect_used_without_including_sys_socket_h
 139 #   undef accept
 140 #   define accept              accept_used_without_including_sys_socket_h
 141 #   undef bind
 142 #   define bind                bind_used_without_including_sys_socket_h
 143 #   undef getpeername
 144 #   define getpeername         getpeername_used_without_including_sys_socket_h
 145 #   undef getsockname
 146 #   define getsockname         getsockname_used_without_including_sys_socket_h
 147 #   undef getsockopt
 148 #   define getsockopt          getsockopt_used_without_including_sys_socket_h
 149 #   undef listen
 150 #   define listen              listen_used_without_including_sys_socket_h
 151 #   undef recv
 152 #   define recv                recv_used_without_including_sys_socket_h
 153 #   undef send
 154 #   define send                send_used_without_including_sys_socket_h
 155 #   undef recvfrom
 156 #   define recvfrom            recvfrom_used_without_including_sys_socket_h
 157 #   undef sendto
 158 #   define sendto              sendto_used_without_including_sys_socket_h
 159 #   undef setsockopt
 160 #   define setsockopt          setsockopt_used_without_including_sys_socket_h
 161 #   undef shutdown
 162 #   define shutdown            shutdown_used_without_including_sys_socket_h
 163 #  else
 164     _GL_WARN_ON_USE (socket,
 165                      "socket() used without including <sys/socket.h>");
 166     _GL_WARN_ON_USE (connect,
 167                      "connect() used without including <sys/socket.h>");
 168     _GL_WARN_ON_USE (accept,
 169                      "accept() used without including <sys/socket.h>");
 170     _GL_WARN_ON_USE (bind,
 171                      "bind() used without including <sys/socket.h>");
 172     _GL_WARN_ON_USE (getpeername,
 173                      "getpeername() used without including <sys/socket.h>");
 174     _GL_WARN_ON_USE (getsockname,
 175                      "getsockname() used without including <sys/socket.h>");
 176     _GL_WARN_ON_USE (getsockopt,
 177                      "getsockopt() used without including <sys/socket.h>");
 178     _GL_WARN_ON_USE (listen,
 179                      "listen() used without including <sys/socket.h>");
 180     _GL_WARN_ON_USE (recv,
 181                      "recv() used without including <sys/socket.h>");
 182     _GL_WARN_ON_USE (send,
 183                      "send() used without including <sys/socket.h>");
 184     _GL_WARN_ON_USE (recvfrom,
 185                      "recvfrom() used without including <sys/socket.h>");
 186     _GL_WARN_ON_USE (sendto,
 187                      "sendto() used without including <sys/socket.h>");
 188     _GL_WARN_ON_USE (setsockopt,
 189                      "setsockopt() used without including <sys/socket.h>");
 190     _GL_WARN_ON_USE (shutdown,
 191                      "shutdown() used without including <sys/socket.h>");
 192 #  endif
 193 # endif
 194 # if !defined _@GUARD_PREFIX@_SYS_SELECT_H
 195 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 196 #   undef select
 197 #   define select              select_used_without_including_sys_select_h
 198 #  else
 199     _GL_WARN_ON_USE (select,
 200                      "select() used without including <sys/select.h>");
 201 #  endif
 202 # endif
 203 #endif
 204
 205
 206 /* OS/2 EMX lacks these macros.  */
 207 #ifndef STDIN_FILENO
 208 # define STDIN_FILENO 0
 209 #endif
 210 #ifndef STDOUT_FILENO
 211 # define STDOUT_FILENO 1
 212 #endif
 213 #ifndef STDERR_FILENO
 214 # define STDERR_FILENO 2
 215 #endif
 216
 217 /* Ensure *_OK macros exist.  */
 218 #ifndef F_OK
 219 # define F_OK 0
 220 # define X_OK 1
 221 # define W_OK 2
 222 # define R_OK 4
 223 #endif
 224
 225
 226 /* Declare overridden functions.  */
 227
 228
 229 #if defined GNULIB_POSIXCHECK
 230 /* The access() function is a security risk.  */
 231 _GL_WARN_ON_USE (access, "the access function is a security risk - "
 232                  "use the gnulib module faccessat instead");
 233 #endif
 234
 235
 236 #if @GNULIB_CHDIR@
 237 _GL_CXXALIAS_SYS (chdir, int, (const char *file) _GL_ARG_NONNULL ((1)));
 238 _GL_CXXALIASWARN (chdir);
 239 #elif defined GNULIB_POSIXCHECK
 240 # undef chdir
 241 # if HAVE_RAW_DECL_CHDIR
 242 _GL_WARN_ON_USE (chown, "chdir is not always in <unistd.h> - "
 243                  "use gnulib module chdir for portability");
 244 # endif
 245 #endif
 246
 247
 248 #if @GNULIB_CHOWN@
 249 /* Change the owner of FILE to UID (if UID is not -1) and the group of FILE
 250    to GID (if GID is not -1).  Follow symbolic links.
 251    Return 0 if successful, otherwise -1 and errno set.
 252    See the POSIX:2008 specification
 253    <http://pubs.opengroup.org/onlinepubs/9699919799/functions/chown.html.  */
 254 # if @REPLACE_CHOWN@
 255 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 256 #   undef chown
 257 #   define chown rpl_chown
 258 #  endif
 259 _GL_FUNCDECL_RPL (chown, int, (const char *file, uid_t uid, gid_t gid)
 260                               _GL_ARG_NONNULL ((1)));
 261 _GL_CXXALIAS_RPL (chown, int, (const char *file, uid_t uid, gid_t gid));
 262 # else
 263 #  if !@HAVE_CHOWN@
 264 _GL_FUNCDECL_SYS (chown, int, (const char *file, uid_t uid, gid_t gid)
 265                               _GL_ARG_NONNULL ((1)));
 266 #  endif
 267 _GL_CXXALIAS_SYS (chown, int, (const char *file, uid_t uid, gid_t gid));
 268 # endif
 269 _GL_CXXALIASWARN (chown);
 270 #elif defined GNULIB_POSIXCHECK
 271 # undef chown
 272 # if HAVE_RAW_DECL_CHOWN
 273 _GL_WARN_ON_USE (chown, "chown fails to follow symlinks on some systems and "
 274                  "doesn't treat a uid or gid of -1 on some systems - "
 275                  "use gnulib module chown for portability");
 276 # endif
 277 #endif
 278
 279
 280 #if @GNULIB_CLOSE@
 281 # if @REPLACE_CLOSE@
 282 /* Automatically included by modules that need a replacement for close.  */
 283 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 284 #   undef close
 285 #   define close rpl_close
 286 #  endif
 287 _GL_FUNCDECL_RPL (close, int, (int fd));
 288 _GL_CXXALIAS_RPL (close, int, (int fd));
 289 # else
 290 _GL_CXXALIAS_SYS (close, int, (int fd));
 291 # endif
 292 _GL_CXXALIASWARN (close);
 293 #elif @UNISTD_H_HAVE_WINSOCK2_H_AND_USE_SOCKETS@
 294 # undef close
 295 # define close close_used_without_requesting_gnulib_module_close
 296 #elif defined GNULIB_POSIXCHECK
 297 # undef close
 298 /* Assume close is always declared.  */
 299 _GL_WARN_ON_USE (close, "close does not portably work on sockets - "
 300                  "use gnulib module close for portability");
 301 #endif
 302
 303
 304 #if @GNULIB_DUP@
 305 # if @REPLACE_DUP@
 306 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 307 #   define dup rpl_dup
 308 #  endif
 309 _GL_FUNCDECL_RPL (dup, int, (int oldfd));
 310 _GL_CXXALIAS_RPL (dup, int, (int oldfd));
 311 # else
 312 _GL_CXXALIAS_SYS (dup, int, (int oldfd));
 313 # endif
 314 _GL_CXXALIASWARN (dup);
 315 #elif defined GNULIB_POSIXCHECK
 316 # undef dup
 317 # if HAVE_RAW_DECL_DUP
 318 _GL_WARN_ON_USE (dup, "dup is unportable - "
 319                  "use gnulib module dup for portability");
 320 # endif
 321 #endif
 322
 323
 324 #if @GNULIB_DUP2@
 325 /* Copy the file descriptor OLDFD into file descriptor NEWFD.  Do nothing if
 326    NEWFD = OLDFD, otherwise close NEWFD first if it is open.
 327    Return newfd if successful, otherwise -1 and errno set.
 328    See the POSIX:2008 specification
 329    <http://pubs.opengroup.org/onlinepubs/9699919799/functions/dup2.html>.  */
 330 # if @REPLACE_DUP2@
 331 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 332 #   define dup2 rpl_dup2
 333 #  endif
 334 _GL_FUNCDECL_RPL (dup2, int, (int oldfd, int newfd));
 335 _GL_CXXALIAS_RPL (dup2, int, (int oldfd, int newfd));
 336 # else
 337 #  if !@HAVE_DUP2@
 338 _GL_FUNCDECL_SYS (dup2, int, (int oldfd, int newfd));
 339 #  endif
 340 _GL_CXXALIAS_SYS (dup2, int, (int oldfd, int newfd));
 341 # endif
 342 _GL_CXXALIASWARN (dup2);
 343 #elif defined GNULIB_POSIXCHECK
 344 # undef dup2
 345 # if HAVE_RAW_DECL_DUP2
 346 _GL_WARN_ON_USE (dup2, "dup2 is unportable - "
 347                  "use gnulib module dup2 for portability");
 348 # endif
 349 #endif
 350
 351
 352 #if @GNULIB_DUP3@
 353 /* Copy the file descriptor OLDFD into file descriptor NEWFD, with the
 354    specified flags.
 355    The flags are a bitmask, possibly including O_CLOEXEC (defined in <fcntl.h>)
 356    and O_TEXT, O_BINARY (defined in "binary-io.h").
 357    Close NEWFD first if it is open.
 358    Return newfd if successful, otherwise -1 and errno set.
 359    See the Linux man page at
 360    <http://www.kernel.org/doc/man-pages/online/pages/man2/dup3.2.html>.  */
 361 # if @HAVE_DUP3@
 362 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 363 #   define dup3 rpl_dup3
 364 #  endif
 365 _GL_FUNCDECL_RPL (dup3, int, (int oldfd, int newfd, int flags));
 366 _GL_CXXALIAS_RPL (dup3, int, (int oldfd, int newfd, int flags));
 367 # else
 368 _GL_FUNCDECL_SYS (dup3, int, (int oldfd, int newfd, int flags));
 369 _GL_CXXALIAS_SYS (dup3, int, (int oldfd, int newfd, int flags));
 370 # endif
 371 _GL_CXXALIASWARN (dup3);
 372 #elif defined GNULIB_POSIXCHECK
 373 # undef dup3
 374 # if HAVE_RAW_DECL_DUP3
 375 _GL_WARN_ON_USE (dup3, "dup3 is unportable - "
 376                  "use gnulib module dup3 for portability");
 377 # endif
 378 #endif
 379
 380
 381 #if @GNULIB_ENVIRON@
 382 # if !@HAVE_DECL_ENVIRON@
 383 /* Set of environment variables and values.  An array of strings of the form
 384    "VARIABLE=VALUE", terminated with a NULL.  */
 385 #  if defined __APPLE__ && defined __MACH__
 386 #   include <crt_externs.h>
 387 #   define environ (*_NSGetEnviron ())
 388 #  else
 389 #   ifdef __cplusplus
 390 extern "C" {
 391 #   endif
 392 extern char **environ;
 393 #   ifdef __cplusplus
 394 }
 395 #   endif
 396 #  endif
 397 # endif
 398 #elif defined GNULIB_POSIXCHECK
 399 # if HAVE_RAW_DECL_ENVIRON
 400 static inline char ***
 401 rpl_environ (void)
 402 {
 403   return &environ;
 404 }
 405 _GL_WARN_ON_USE (rpl_environ, "environ is unportable - "
 406                  "use gnulib module environ for portability");
 407 #  undef environ
 408 #  define environ (*rpl_environ ())
 409 # endif
 410 #endif
 411
 412
 413 #if @GNULIB_EUIDACCESS@
 414 /* Like access(), except that it uses the effective user id and group id of
 415    the current process.  */
 416 # if !@HAVE_EUIDACCESS@
 417 _GL_FUNCDECL_SYS (euidaccess, int, (const char *filename, int mode)
 418                                    _GL_ARG_NONNULL ((1)));
 419 # endif
 420 _GL_CXXALIAS_SYS (euidaccess, int, (const char *filename, int mode));
 421 _GL_CXXALIASWARN (euidaccess);
 422 # if defined GNULIB_POSIXCHECK
 423 /* Like access(), this function is a security risk.  */
 424 _GL_WARN_ON_USE (euidaccess, "the euidaccess function is a security risk - "
 425                  "use the gnulib module faccessat instead");
 426 # endif
 427 #elif defined GNULIB_POSIXCHECK
 428 # undef euidaccess
 429 # if HAVE_RAW_DECL_EUIDACCESS
 430 _GL_WARN_ON_USE (euidaccess, "euidaccess is unportable - "
 431                  "use gnulib module euidaccess for portability");
 432 # endif
 433 #endif
 434
 435
 436 #if @GNULIB_FACCESSAT@
 437 # if !@HAVE_FACCESSAT@
 438 _GL_FUNCDECL_SYS (faccessat, int,
 439                   (int fd, char const *file, int mode, int flag)
 440                   _GL_ARG_NONNULL ((2)));
 441 # endif
 442 _GL_CXXALIAS_SYS (faccessat, int,
 443                   (int fd, char const *file, int mode, int flag));
 444 _GL_CXXALIASWARN (faccessat);
 445 #elif defined GNULIB_POSIXCHECK
 446 # undef faccessat
 447 # if HAVE_RAW_DECL_FACCESSAT
 448 _GL_WARN_ON_USE (faccessat, "faccessat is not portable - "
 449                  "use gnulib module faccessat for portability");
 450 # endif
 451 #endif
 452
 453
 454 #if @GNULIB_FCHDIR@
 455 /* Change the process' current working directory to the directory on which
 456    the given file descriptor is open.
 457    Return 0 if successful, otherwise -1 and errno set.
 458    See the POSIX:2008 specification
 459    <http://pubs.opengroup.org/onlinepubs/9699919799/functions/fchdir.html>.  */
 460 # if ! @HAVE_FCHDIR@
 461 _GL_FUNCDECL_SYS (fchdir, int, (int /*fd*/));
 462
 463 /* Gnulib internal hooks needed to maintain the fchdir metadata.  */
 464 _GL_EXTERN_C int _gl_register_fd (int fd, const char *filename)
 465      _GL_ARG_NONNULL ((2));
 466 _GL_EXTERN_C void _gl_unregister_fd (int fd);
 467 _GL_EXTERN_C int _gl_register_dup (int oldfd, int newfd);
 468 _GL_EXTERN_C const char *_gl_directory_name (int fd);
 469
 470 # else
 471 #  if !@HAVE_DECL_FCHDIR@
 472 _GL_FUNCDECL_SYS (fchdir, int, (int /*fd*/));
 473 #  endif
 474 # endif
 475 _GL_CXXALIAS_SYS (fchdir, int, (int /*fd*/));
 476 _GL_CXXALIASWARN (fchdir);
 477 #elif defined GNULIB_POSIXCHECK
 478 # undef fchdir
 479 # if HAVE_RAW_DECL_FCHDIR
 480 _GL_WARN_ON_USE (fchdir, "fchdir is unportable - "
 481                  "use gnulib module fchdir for portability");
 482 # endif
 483 #endif
 484
 485
 486 #if @GNULIB_FCHOWNAT@
 487 # if @REPLACE_FCHOWNAT@
 488 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 489 #   undef fchownat
 490 #   define fchownat rpl_fchownat
 491 #  endif
 492 _GL_FUNCDECL_RPL (fchownat, int, (int fd, char const *file,
 493                                   uid_t owner, gid_t group, int flag)
 494                                  _GL_ARG_NONNULL ((2)));
 495 _GL_CXXALIAS_RPL (fchownat, int, (int fd, char const *file,
 496                                   uid_t owner, gid_t group, int flag));
 497 # else
 498 #  if !@HAVE_FCHOWNAT@
 499 _GL_FUNCDECL_SYS (fchownat, int, (int fd, char const *file,
 500                                   uid_t owner, gid_t group, int flag)
 501                                  _GL_ARG_NONNULL ((2)));
 502 #  endif
 503 _GL_CXXALIAS_SYS (fchownat, int, (int fd, char const *file,
 504                                   uid_t owner, gid_t group, int flag));
 505 # endif
 506 _GL_CXXALIASWARN (fchownat);
 507 #elif defined GNULIB_POSIXCHECK
 508 # undef fchownat
 509 # if HAVE_RAW_DECL_FCHOWNAT
 510 _GL_WARN_ON_USE (fchownat, "fchownat is not portable - "
 511                  "use gnulib module openat for portability");
 512 # endif
 513 #endif
 514
 515
 516 #if @GNULIB_FDATASYNC@
 517 /* Synchronize changes to a file.
 518    Return 0 if successful, otherwise -1 and errno set.
 519    See POSIX:2008 specification
 520    <http://pubs.opengroup.org/onlinepubs/9699919799/functions/fdatasync.html>.  */
 521 # if !@HAVE_FDATASYNC@ || !@HAVE_DECL_FDATASYNC@
 522 _GL_FUNCDECL_SYS (fdatasync, int, (int fd));
 523 # endif
 524 _GL_CXXALIAS_SYS (fdatasync, int, (int fd));
 525 _GL_CXXALIASWARN (fdatasync);
 526 #elif defined GNULIB_POSIXCHECK
 527 # undef fdatasync
 528 # if HAVE_RAW_DECL_FDATASYNC
 529 _GL_WARN_ON_USE (fdatasync, "fdatasync is unportable - "
 530                  "use gnulib module fdatasync for portability");
 531 # endif
 532 #endif
 533
 534
 535 #if @GNULIB_FSYNC@
 536 /* Synchronize changes, including metadata, to a file.
 537    Return 0 if successful, otherwise -1 and errno set.
 538    See POSIX:2008 specification
 539    <http://pubs.opengroup.org/onlinepubs/9699919799/functions/fsync.html>.  */
 540 # if !@HAVE_FSYNC@
 541 _GL_FUNCDECL_SYS (fsync, int, (int fd));
 542 # endif
 543 _GL_CXXALIAS_SYS (fsync, int, (int fd));
 544 _GL_CXXALIASWARN (fsync);
 545 #elif defined GNULIB_POSIXCHECK
 546 # undef fsync
 547 # if HAVE_RAW_DECL_FSYNC
 548 _GL_WARN_ON_USE (fsync, "fsync is unportable - "
 549                  "use gnulib module fsync for portability");
 550 # endif
 551 #endif
 552
 553
 554 #if @GNULIB_FTRUNCATE@
 555 /* Change the size of the file to which FD is opened to become equal to LENGTH.
 556    Return 0 if successful, otherwise -1 and errno set.
 557    See the POSIX:2008 specification
 558    <http://pubs.opengroup.org/onlinepubs/9699919799/functions/ftruncate.html>.  */
 559 # if !@HAVE_FTRUNCATE@
 560 _GL_FUNCDECL_SYS (ftruncate, int, (int fd, off_t length));
 561 # endif
 562 _GL_CXXALIAS_SYS (ftruncate, int, (int fd, off_t length));
 563 _GL_CXXALIASWARN (ftruncate);
 564 #elif defined GNULIB_POSIXCHECK
 565 # undef ftruncate
 566 # if HAVE_RAW_DECL_FTRUNCATE
 567 _GL_WARN_ON_USE (ftruncate, "ftruncate is unportable - "
 568                  "use gnulib module ftruncate for portability");
 569 # endif
 570 #endif
 571
 572
 573 #if @GNULIB_GETCWD@
 574 /* Get the name of the current working directory, and put it in SIZE bytes
 575    of BUF.
 576    Return BUF if successful, or NULL if the directory couldn't be determined
 577    or SIZE was too small.
 578    See the POSIX:2008 specification
 579    <http://pubs.opengroup.org/onlinepubs/9699919799/functions/getcwd.html>.
 580    Additionally, the gnulib module 'getcwd' guarantees the following GNU
 581    extension: If BUF is NULL, an array is allocated with 'malloc'; the array
 582    is SIZE bytes long, unless SIZE == 0, in which case it is as big as
 583    necessary.  */
 584 # if @REPLACE_GETCWD@
 585 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 586 #   define getcwd rpl_getcwd
 587 #  endif
 588 _GL_FUNCDECL_RPL (getcwd, char *, (char *buf, size_t size));
 589 _GL_CXXALIAS_RPL (getcwd, char *, (char *buf, size_t size));
 590 # else
 591 /* Need to cast, because on mingw, the second parameter is
 592                                                    int size.  */
 593 _GL_CXXALIAS_SYS_CAST (getcwd, char *, (char *buf, size_t size));
 594 # endif
 595 _GL_CXXALIASWARN (getcwd);
 596 #elif defined GNULIB_POSIXCHECK
 597 # undef getcwd
 598 # if HAVE_RAW_DECL_GETCWD
 599 _GL_WARN_ON_USE (getcwd, "getcwd is unportable - "
 600                  "use gnulib module getcwd for portability");
 601 # endif
 602 #endif
 603
 604
 605 #if @GNULIB_GETDOMAINNAME@
 606 /* Return the NIS domain name of the machine.
 607    WARNING! The NIS domain name is unrelated to the fully qualified host name
 608             of the machine.  It is also unrelated to email addresses.
 609    WARNING! The NIS domain name is usually the empty string or "(none)" when
 610             not using NIS.
 611
 612    Put up to LEN bytes of the NIS domain name into NAME.
 613    Null terminate it if the name is shorter than LEN.
 614    If the NIS domain name is longer than LEN, set errno = EINVAL and return -1.
 615    Return 0 if successful, otherwise set errno and return -1.  */
 616 # if @REPLACE_GETDOMAINNAME@
 617 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 618 #   undef getdomainname
 619 #   define getdomainname rpl_getdomainname
 620 #  endif
 621 _GL_FUNCDECL_RPL (getdomainname, int, (char *name, size_t len)
 622                                       _GL_ARG_NONNULL ((1)));
 623 _GL_CXXALIAS_RPL (getdomainname, int, (char *name, size_t len));
 624 # else
 625 #  if !@HAVE_DECL_GETDOMAINNAME@
 626 _GL_FUNCDECL_SYS (getdomainname, int, (char *name, size_t len)
 627                                       _GL_ARG_NONNULL ((1)));
 628 #  endif
 629 _GL_CXXALIAS_SYS (getdomainname, int, (char *name, size_t len));
 630 # endif
 631 _GL_CXXALIASWARN (getdomainname);
 632 #elif defined GNULIB_POSIXCHECK
 633 # undef getdomainname
 634 # if HAVE_RAW_DECL_GETDOMAINNAME
 635 _GL_WARN_ON_USE (getdomainname, "getdomainname is unportable - "
 636                  "use gnulib module getdomainname for portability");
 637 # endif
 638 #endif
 639
 640
 641 #if @GNULIB_GETDTABLESIZE@
 642 /* Return the maximum number of file descriptors in the current process.
 643    In POSIX, this is same as sysconf (_SC_OPEN_MAX).  */
 644 # if !@HAVE_GETDTABLESIZE@
 645 _GL_FUNCDECL_SYS (getdtablesize, int, (void));
 646 # endif
 647 _GL_CXXALIAS_SYS (getdtablesize, int, (void));
 648 _GL_CXXALIASWARN (getdtablesize);
 649 #elif defined GNULIB_POSIXCHECK
 650 # undef getdtablesize
 651 # if HAVE_RAW_DECL_GETDTABLESIZE
 652 _GL_WARN_ON_USE (getdtablesize, "getdtablesize is unportable - "
 653                  "use gnulib module getdtablesize for portability");
 654 # endif
 655 #endif
 656
 657
 658 #if @GNULIB_GETGROUPS@
 659 /* Return the supplemental groups that the current process belongs to.
 660    It is unspecified whether the effective group id is in the list.
 661    If N is 0, return the group count; otherwise, N describes how many
 662    entries are available in GROUPS.  Return -1 and set errno if N is
 663    not 0 and not large enough.  Fails with ENOSYS on some systems.  */
 664 # if @REPLACE_GETGROUPS@
 665 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 666 #   undef getgroups
 667 #   define getgroups rpl_getgroups
 668 #  endif
 669 _GL_FUNCDECL_RPL (getgroups, int, (int n, gid_t *groups));
 670 _GL_CXXALIAS_RPL (getgroups, int, (int n, gid_t *groups));
 671 # else
 672 #  if !@HAVE_GETGROUPS@
 673 _GL_FUNCDECL_SYS (getgroups, int, (int n, gid_t *groups));
 674 #  endif
 675 _GL_CXXALIAS_SYS (getgroups, int, (int n, gid_t *groups));
 676 # endif
 677 _GL_CXXALIASWARN (getgroups);
 678 #elif defined GNULIB_POSIXCHECK
 679 # undef getgroups
 680 # if HAVE_RAW_DECL_GETGROUPS
 681 _GL_WARN_ON_USE (getgroups, "getgroups is unportable - "
 682                  "use gnulib module getgroups for portability");
 683 # endif
 684 #endif
 685
 686
 687 #if @GNULIB_GETHOSTNAME@
 688 /* Return the standard host name of the machine.
 689    WARNING! The host name may or may not be fully qualified.
 690
 691    Put up to LEN bytes of the host name into NAME.
 692    Null terminate it if the name is shorter than LEN.
 693    If the host name is longer than LEN, set errno = EINVAL and return -1.
 694    Return 0 if successful, otherwise set errno and return -1.  */
 695 # if @UNISTD_H_HAVE_WINSOCK2_H@
 696 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 697 #   undef gethostname
 698 #   define gethostname rpl_gethostname
 699 #  endif
 700 _GL_FUNCDECL_RPL (gethostname, int, (char *name, size_t len)
 701                                     _GL_ARG_NONNULL ((1)));
 702 _GL_CXXALIAS_RPL (gethostname, int, (char *name, size_t len));
 703 # else
 704 #  if !@HAVE_GETHOSTNAME@
 705 _GL_FUNCDECL_SYS (gethostname, int, (char *name, size_t len)
 706                                     _GL_ARG_NONNULL ((1)));
 707 #  endif
 708 /* Need to cast, because on Solaris 10 and OSF/1 5.1 systems, the second
 709    parameter is
 710                                                       int len.  */
 711 _GL_CXXALIAS_SYS_CAST (gethostname, int, (char *name, size_t len));
 712 # endif
 713 _GL_CXXALIASWARN (gethostname);
 714 #elif @UNISTD_H_HAVE_WINSOCK2_H@
 715 # undef gethostname
 716 # define gethostname gethostname_used_without_requesting_gnulib_module_gethostname
 717 #elif defined GNULIB_POSIXCHECK
 718 # undef gethostname
 719 # if HAVE_RAW_DECL_GETHOSTNAME
 720 _GL_WARN_ON_USE (gethostname, "gethostname is unportable - "
 721                  "use gnulib module gethostname for portability");
 722 # endif
 723 #endif
 724
 725
 726 #if @GNULIB_GETLOGIN@
 727 /* Returns the user's login name, or NULL if it cannot be found.  Upon error,
 728    returns NULL with errno set.
 729
 730    See <http://www.opengroup.org/susv3xsh/getlogin.html>.
 731
 732    Most programs don't need to use this function, because the information is
 733    available through environment variables:
 734      ${LOGNAME-$USER}        on Unix platforms,
 735      $USERNAME               on native Windows platforms.
 736  */
 737 # if !@HAVE_GETLOGIN@
 738 _GL_FUNCDECL_SYS (getlogin, char *, (void));
 739 # endif
 740 _GL_CXXALIAS_SYS (getlogin, char *, (void));
 741 _GL_CXXALIASWARN (getlogin);
 742 #elif defined GNULIB_POSIXCHECK
 743 # undef getlogin
 744 # if HAVE_RAW_DECL_GETLOGIN
 745 _GL_WARN_ON_USE (getlogin, "getlogin is unportable - "
 746                  "use gnulib module getlogin for portability");
 747 # endif
 748 #endif
 749
 750
 751 #if @GNULIB_GETLOGIN_R@
 752 /* Copies the user's login name to NAME.
 753    The array pointed to by NAME has room for SIZE bytes.
 754
 755    Returns 0 if successful.  Upon error, an error number is returned, or -1 in
 756    the case that the login name cannot be found but no specific error is
 757    provided (this case is hopefully rare but is left open by the POSIX spec).
 758
 759    See <http://www.opengroup.org/susv3xsh/getlogin.html>.
 760
 761    Most programs don't need to use this function, because the information is
 762    available through environment variables:
 763      ${LOGNAME-$USER}        on Unix platforms,
 764      $USERNAME               on native Windows platforms.
 765  */
 766 # if @REPLACE_GETLOGIN_R@
 767 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 768 #   define getlogin_r rpl_getlogin_r
 769 #  endif
 770 _GL_FUNCDECL_RPL (getlogin_r, int, (char *name, size_t size)
 771                                    _GL_ARG_NONNULL ((1)));
 772 _GL_CXXALIAS_RPL (getlogin_r, int, (char *name, size_t size));
 773 # else
 774 #  if !@HAVE_DECL_GETLOGIN_R@
 775 _GL_FUNCDECL_SYS (getlogin_r, int, (char *name, size_t size)
 776                                    _GL_ARG_NONNULL ((1)));
 777 #  endif
 778 /* Need to cast, because on Solaris 10 systems, the second argument is
 779                                                      int size.  */
 780 _GL_CXXALIAS_SYS_CAST (getlogin_r, int, (char *name, size_t size));
 781 # endif
 782 _GL_CXXALIASWARN (getlogin_r);
 783 #elif defined GNULIB_POSIXCHECK
 784 # undef getlogin_r
 785 # if HAVE_RAW_DECL_GETLOGIN_R
 786 _GL_WARN_ON_USE (getlogin_r, "getlogin_r is unportable - "
 787                  "use gnulib module getlogin_r for portability");
 788 # endif
 789 #endif
 790
 791
 792 #if @GNULIB_GETPAGESIZE@
 793 # if @REPLACE_GETPAGESIZE@
 794 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 795 #   define getpagesize rpl_getpagesize
 796 #  endif
 797 _GL_FUNCDECL_RPL (getpagesize, int, (void));
 798 _GL_CXXALIAS_RPL (getpagesize, int, (void));
 799 # else
 800 #  if !@HAVE_GETPAGESIZE@
 801 #   if !defined getpagesize
 802 /* This is for POSIX systems.  */
 803 #    if !defined _gl_getpagesize && defined _SC_PAGESIZE
 804 #     if ! (defined __VMS && __VMS_VER < 70000000)
 805 #      define _gl_getpagesize() sysconf (_SC_PAGESIZE)
 806 #     endif
 807 #    endif
 808 /* This is for older VMS.  */
 809 #    if !defined _gl_getpagesize && defined __VMS
 810 #     ifdef __ALPHA
 811 #      define _gl_getpagesize() 8192
 812 #     else
 813 #      define _gl_getpagesize() 512
 814 #     endif
 815 #    endif
 816 /* This is for BeOS.  */
 817 #    if !defined _gl_getpagesize && @HAVE_OS_H@
 818 #     include <OS.h>
 819 #     if defined B_PAGE_SIZE
 820 #      define _gl_getpagesize() B_PAGE_SIZE
 821 #     endif
 822 #    endif
 823 /* This is for AmigaOS4.0.  */
 824 #    if !defined _gl_getpagesize && defined __amigaos4__
 825 #     define _gl_getpagesize() 2048
 826 #    endif
 827 /* This is for older Unix systems.  */
 828 #    if !defined _gl_getpagesize && @HAVE_SYS_PARAM_H@
 829 #     include <sys/param.h>
 830 #     ifdef EXEC_PAGESIZE
 831 #      define _gl_getpagesize() EXEC_PAGESIZE
 832 #     else
 833 #      ifdef NBPG
 834 #       ifndef CLSIZE
 835 #        define CLSIZE 1
 836 #       endif
 837 #       define _gl_getpagesize() (NBPG * CLSIZE)
 838 #      else
 839 #       ifdef NBPC
 840 #        define _gl_getpagesize() NBPC
 841 #       endif
 842 #      endif
 843 #     endif
 844 #    endif
 845 #    if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 846 #     define getpagesize() _gl_getpagesize ()
 847 #    else
 848 #     if !GNULIB_defined_getpagesize_function
 849 static inline int
 850 getpagesize ()
 851 {
 852   return _gl_getpagesize ();
 853 }
 854 #      define GNULIB_defined_getpagesize_function 1
 855 #     endif
 856 #    endif
 857 #   endif
 858 #  endif
 859 /* Need to cast, because on Cygwin 1.5.x systems, the return type is size_t.  */
 860 _GL_CXXALIAS_SYS_CAST (getpagesize, int, (void));
 861 # endif
 862 # if @HAVE_DECL_GETPAGESIZE@
 863 _GL_CXXALIASWARN (getpagesize);
 864 # endif
 865 #elif defined GNULIB_POSIXCHECK
 866 # undef getpagesize
 867 # if HAVE_RAW_DECL_GETPAGESIZE
 868 _GL_WARN_ON_USE (getpagesize, "getpagesize is unportable - "
 869                  "use gnulib module getpagesize for portability");
 870 # endif
 871 #endif
 872
 873
 874 #if @GNULIB_GETUSERSHELL@
 875 /* Return the next valid login shell on the system, or NULL when the end of
 876    the list has been reached.  */
 877 # if !@HAVE_DECL_GETUSERSHELL@
 878 _GL_FUNCDECL_SYS (getusershell, char *, (void));
 879 # endif
 880 _GL_CXXALIAS_SYS (getusershell, char *, (void));
 881 _GL_CXXALIASWARN (getusershell);
 882 #elif defined GNULIB_POSIXCHECK
 883 # undef getusershell
 884 # if HAVE_RAW_DECL_GETUSERSHELL
 885 _GL_WARN_ON_USE (getusershell, "getusershell is unportable - "
 886                  "use gnulib module getusershell for portability");
 887 # endif
 888 #endif
 889
 890 #if @GNULIB_GETUSERSHELL@
 891 /* Rewind to pointer that is advanced at each getusershell() call.  */
 892 # if !@HAVE_DECL_GETUSERSHELL@
 893 _GL_FUNCDECL_SYS (setusershell, void, (void));
 894 # endif
 895 _GL_CXXALIAS_SYS (setusershell, void, (void));
 896 _GL_CXXALIASWARN (setusershell);
 897 #elif defined GNULIB_POSIXCHECK
 898 # undef setusershell
 899 # if HAVE_RAW_DECL_SETUSERSHELL
 900 _GL_WARN_ON_USE (setusershell, "setusershell is unportable - "
 901                  "use gnulib module getusershell for portability");
 902 # endif
 903 #endif
 904
 905 #if @GNULIB_GETUSERSHELL@
 906 /* Free the pointer that is advanced at each getusershell() call and
 907    associated resources.  */
 908 # if !@HAVE_DECL_GETUSERSHELL@
 909 _GL_FUNCDECL_SYS (endusershell, void, (void));
 910 # endif
 911 _GL_CXXALIAS_SYS (endusershell, void, (void));
 912 _GL_CXXALIASWARN (endusershell);
 913 #elif defined GNULIB_POSIXCHECK
 914 # undef endusershell
 915 # if HAVE_RAW_DECL_ENDUSERSHELL
 916 _GL_WARN_ON_USE (endusershell, "endusershell is unportable - "
 917                  "use gnulib module getusershell for portability");
 918 # endif
 919 #endif
 920
 921
 922 #if @GNULIB_GROUP_MEMBER@
 923 /* Determine whether group id is in calling user's group list.  */
 924 # if !@HAVE_GROUP_MEMBER@
 925 _GL_FUNCDECL_SYS (group_member, int, (gid_t gid));
 926 # endif
 927 _GL_CXXALIAS_SYS (group_member, int, (gid_t gid));
 928 _GL_CXXALIASWARN (group_member);
 929 #elif defined GNULIB_POSIXCHECK
 930 # undef group_member
 931 # if HAVE_RAW_DECL_GROUP_MEMBER
 932 _GL_WARN_ON_USE (group_member, "group_member is unportable - "
 933                  "use gnulib module group-member for portability");
 934 # endif
 935 #endif
 936
 937
 938 #if @GNULIB_LCHOWN@
 939 /* Change the owner of FILE to UID (if UID is not -1) and the group of FILE
 940    to GID (if GID is not -1).  Do not follow symbolic links.
 941    Return 0 if successful, otherwise -1 and errno set.
 942    See the POSIX:2008 specification
 943    <http://pubs.opengroup.org/onlinepubs/9699919799/functions/lchown.html>.  */
 944 # if @REPLACE_LCHOWN@
 945 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 946 #   undef lchown
 947 #   define lchown rpl_lchown
 948 #  endif
 949 _GL_FUNCDECL_RPL (lchown, int, (char const *file, uid_t owner, gid_t group)
 950                                _GL_ARG_NONNULL ((1)));
 951 _GL_CXXALIAS_RPL (lchown, int, (char const *file, uid_t owner, gid_t group));
 952 # else
 953 #  if !@HAVE_LCHOWN@
 954 _GL_FUNCDECL_SYS (lchown, int, (char const *file, uid_t owner, gid_t group)
 955                                _GL_ARG_NONNULL ((1)));
 956 #  endif
 957 _GL_CXXALIAS_SYS (lchown, int, (char const *file, uid_t owner, gid_t group));
 958 # endif
 959 _GL_CXXALIASWARN (lchown);
 960 #elif defined GNULIB_POSIXCHECK
 961 # undef lchown
 962 # if HAVE_RAW_DECL_LCHOWN
 963 _GL_WARN_ON_USE (lchown, "lchown is unportable to pre-POSIX.1-2001 systems - "
 964                  "use gnulib module lchown for portability");
 965 # endif
 966 #endif
 967
 968
 969 #if @GNULIB_LINK@
 970 /* Create a new hard link for an existing file.
 971    Return 0 if successful, otherwise -1 and errno set.
 972    See POSIX:2008 specification
 973    <http://pubs.opengroup.org/onlinepubs/9699919799/functions/link.html>.  */
 974 # if @REPLACE_LINK@
 975 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 976 #   define link rpl_link
 977 #  endif
 978 _GL_FUNCDECL_RPL (link, int, (const char *path1, const char *path2)
 979                              _GL_ARG_NONNULL ((1, 2)));
 980 _GL_CXXALIAS_RPL (link, int, (const char *path1, const char *path2));
 981 # else
 982 #  if !@HAVE_LINK@
 983 _GL_FUNCDECL_SYS (link, int, (const char *path1, const char *path2)
 984                              _GL_ARG_NONNULL ((1, 2)));
 985 #  endif
 986 _GL_CXXALIAS_SYS (link, int, (const char *path1, const char *path2));
 987 # endif
 988 _GL_CXXALIASWARN (link);
 989 #elif defined GNULIB_POSIXCHECK
 990 # undef link
 991 # if HAVE_RAW_DECL_LINK
 992 _GL_WARN_ON_USE (link, "link is unportable - "
 993                  "use gnulib module link for portability");
 994 # endif
 995 #endif
 996
 997
 998 #if @GNULIB_LINKAT@
 999 /* Create a new hard link for an existing file, relative to two
1000    directories.  FLAG controls whether symlinks are followed.
1001    Return 0 if successful, otherwise -1 and errno set.  */
1002 # if @REPLACE_LINKAT@
1003 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1004 #   undef linkat
1005 #   define linkat rpl_linkat
1006 #  endif
1007 _GL_FUNCDECL_RPL (linkat, int,
1008                   (int fd1, const char *path1, int fd2, const char *path2,
1009                    int flag)
1010                   _GL_ARG_NONNULL ((2, 4)));
1011 _GL_CXXALIAS_RPL (linkat, int,
1012                   (int fd1, const char *path1, int fd2, const char *path2,
1013                    int flag));
1014 # else
1015 #  if !@HAVE_LINKAT@
1016 _GL_FUNCDECL_SYS (linkat, int,
1017                   (int fd1, const char *path1, int fd2, const char *path2,
1018                    int flag)
1019                   _GL_ARG_NONNULL ((2, 4)));
1020 #  endif
1021 _GL_CXXALIAS_SYS (linkat, int,
1022                   (int fd1, const char *path1, int fd2, const char *path2,
1023                    int flag));
1024 # endif
1025 _GL_CXXALIASWARN (linkat);
1026 #elif defined GNULIB_POSIXCHECK
1027 # undef linkat
1028 # if HAVE_RAW_DECL_LINKAT
1029 _GL_WARN_ON_USE (linkat, "linkat is unportable - "
1030                  "use gnulib module linkat for portability");
1031 # endif
1032 #endif
1033
1034
1035 #if @GNULIB_LSEEK@
1036 /* Set the offset of FD relative to SEEK_SET, SEEK_CUR, or SEEK_END.
1037    Return the new offset if successful, otherwise -1 and errno set.
1038    See the POSIX:2008 specification
1039    <http://pubs.opengroup.org/onlinepubs/9699919799/functions/lseek.html>.  */
1040 # if @REPLACE_LSEEK@
1041 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1042 #   define lseek rpl_lseek
1043 #  endif
1044 _GL_FUNCDECL_RPL (lseek, off_t, (int fd, off_t offset, int whence));
1045 _GL_CXXALIAS_RPL (lseek, off_t, (int fd, off_t offset, int whence));
1046 # else
1047 _GL_CXXALIAS_SYS (lseek, off_t, (int fd, off_t offset, int whence));
1048 # endif
1049 _GL_CXXALIASWARN (lseek);
1050 #elif defined GNULIB_POSIXCHECK
1051 # undef lseek
1052 # if HAVE_RAW_DECL_LSEEK
1053 _GL_WARN_ON_USE (lseek, "lseek does not fail with ESPIPE on pipes on some "
1054                  "systems - use gnulib module lseek for portability");
1055 # endif
1056 #endif
1057
1058
1059 #if @GNULIB_PIPE@
1060 /* Create a pipe, defaulting to O_BINARY mode.
1061    Store the read-end as fd[0] and the write-end as fd[1].
1062    Return 0 upon success, or -1 with errno set upon failure.  */
1063 # if !@HAVE_PIPE@
1064 _GL_FUNCDECL_SYS (pipe, int, (int fd[2]) _GL_ARG_NONNULL ((1)));
1065 # endif
1066 _GL_CXXALIAS_SYS (pipe, int, (int fd[2]));
1067 _GL_CXXALIASWARN (pipe);
1068 #elif defined GNULIB_POSIXCHECK
1069 # undef pipe
1070 # if HAVE_RAW_DECL_PIPE
1071 _GL_WARN_ON_USE (pipe, "pipe is unportable - "
1072                  "use gnulib module pipe-posix for portability");
1073 # endif
1074 #endif
1075
1076
1077 #if @GNULIB_PIPE2@
1078 /* Create a pipe, applying the given flags when opening the read-end of the
1079    pipe and the write-end of the pipe.
1080    The flags are a bitmask, possibly including O_CLOEXEC (defined in <fcntl.h>)
1081    and O_TEXT, O_BINARY (defined in "binary-io.h").
1082    Store the read-end as fd[0] and the write-end as fd[1].
1083    Return 0 upon success, or -1 with errno set upon failure.
1084    See also the Linux man page at
1085    <http://www.kernel.org/doc/man-pages/online/pages/man2/pipe2.2.html>.  */
1086 # if @HAVE_PIPE2@
1087 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1088 #   define pipe2 rpl_pipe2
1089 #  endif
1090 _GL_FUNCDECL_RPL (pipe2, int, (int fd[2], int flags) _GL_ARG_NONNULL ((1)));
1091 _GL_CXXALIAS_RPL (pipe2, int, (int fd[2], int flags));
1092 # else
1093 _GL_FUNCDECL_SYS (pipe2, int, (int fd[2], int flags) _GL_ARG_NONNULL ((1)));
1094 _GL_CXXALIAS_SYS (pipe2, int, (int fd[2], int flags));
1095 # endif
1096 _GL_CXXALIASWARN (pipe2);
1097 #elif defined GNULIB_POSIXCHECK
1098 # undef pipe2
1099 # if HAVE_RAW_DECL_PIPE2
1100 _GL_WARN_ON_USE (pipe2, "pipe2 is unportable - "
1101                  "use gnulib module pipe2 for portability");
1102 # endif
1103 #endif
1104
1105
1106 #if @GNULIB_PREAD@
1107 /* Read at most BUFSIZE bytes from FD into BUF, starting at OFFSET.
1108    Return the number of bytes placed into BUF if successful, otherwise
1109    set errno and return -1.  0 indicates EOF.
1110    See the POSIX:2008 specification
1111    <http://pubs.opengroup.org/onlinepubs/9699919799/functions/pread.html>.  */
1112 # if @REPLACE_PREAD@
1113 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1114 #   undef pread
1115 #   define pread rpl_pread
1116 #  endif
1117 _GL_FUNCDECL_RPL (pread, ssize_t,
1118                   (int fd, void *buf, size_t bufsize, off_t offset)
1119                   _GL_ARG_NONNULL ((2)));
1120 _GL_CXXALIAS_RPL (pread, ssize_t,
1121                   (int fd, void *buf, size_t bufsize, off_t offset));
1122 # else
1123 #  if !@HAVE_PREAD@
1124 _GL_FUNCDECL_SYS (pread, ssize_t,
1125                   (int fd, void *buf, size_t bufsize, off_t offset)
1126                   _GL_ARG_NONNULL ((2)));
1127 #  endif
1128 _GL_CXXALIAS_SYS (pread, ssize_t,
1129                   (int fd, void *buf, size_t bufsize, off_t offset));
1130 # endif
1131 _GL_CXXALIASWARN (pread);
1132 #elif defined GNULIB_POSIXCHECK
1133 # undef pread
1134 # if HAVE_RAW_DECL_PREAD
1135 _GL_WARN_ON_USE (pread, "pread is unportable - "
1136                  "use gnulib module pread for portability");
1137 # endif
1138 #endif
1139
1140
1141 #if @GNULIB_PWRITE@
1142 /* Write at most BUFSIZE bytes from BUF into FD, starting at OFFSET.
1143    Return the number of bytes written if successful, otherwise
1144    set errno and return -1.  0 indicates nothing written.  See the
1145    POSIX:2008 specification
1146    <http://pubs.opengroup.org/onlinepubs/9699919799/functions/pwrite.html>.  */
1147 # if @REPLACE_PWRITE@
1148 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1149 #   undef pwrite
1150 #   define pwrite rpl_pwrite
1151 #  endif
1152 _GL_FUNCDECL_RPL (pwrite, ssize_t,
1153                   (int fd, const void *buf, size_t bufsize, off_t offset)
1154                   _GL_ARG_NONNULL ((2)));
1155 _GL_CXXALIAS_RPL (pwrite, ssize_t,
1156                   (int fd, const void *buf, size_t bufsize, off_t offset));
1157 # else
1158 #  if !@HAVE_PWRITE@
1159 _GL_FUNCDECL_SYS (pwrite, ssize_t,
1160                   (int fd, const void *buf, size_t bufsize, off_t offset)
1161                   _GL_ARG_NONNULL ((2)));
1162 #  endif
1163 _GL_CXXALIAS_SYS (pwrite, ssize_t,
1164                   (int fd, const void *buf, size_t bufsize, off_t offset));
1165 # endif
1166 _GL_CXXALIASWARN (pwrite);
1167 #elif defined GNULIB_POSIXCHECK
1168 # undef pwrite
1169 # if HAVE_RAW_DECL_PWRITE
1170 _GL_WARN_ON_USE (pwrite, "pwrite is unportable - "
1171                  "use gnulib module pwrite for portability");
1172 # endif
1173 #endif
1174
1175
1176 #if @GNULIB_READ@
1177 /* Read up to COUNT bytes from file descriptor FD into the buffer starting
1178    at BUF.  See the POSIX:2008 specification
1179    <http://pubs.opengroup.org/onlinepubs/9699919799/functions/read.html>.  */
1180 # if @REPLACE_READ@
1181 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1182 #   undef read
1183 #   define read rpl_read
1184 #  endif
1185 _GL_FUNCDECL_RPL (read, ssize_t, (int fd, void *buf, size_t count)
1186                                  _GL_ARG_NONNULL ((2)));
1187 _GL_CXXALIAS_RPL (read, ssize_t, (int fd, void *buf, size_t count));
1188 # else
1189 /* Need to cast, because on mingw, the third parameter is
1190                                                           unsigned int count
1191    and the return type is 'int'.  */
1192 _GL_CXXALIAS_SYS_CAST (read, ssize_t, (int fd, void *buf, size_t count));
1193 # endif
1194 _GL_CXXALIASWARN (read);
1195 #endif
1196
1197
1198 #if @GNULIB_READLINK@
1199 /* Read the contents of the symbolic link FILE and place the first BUFSIZE
1200    bytes of it into BUF.  Return the number of bytes placed into BUF if
1201    successful, otherwise -1 and errno set.
1202    See the POSIX:2008 specification
1203    <http://pubs.opengroup.org/onlinepubs/9699919799/functions/readlink.html>.  */
1204 # if @REPLACE_READLINK@
1205 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1206 #   define readlink rpl_readlink
1207 #  endif
1208 _GL_FUNCDECL_RPL (readlink, ssize_t,
1209                   (const char *file, char *buf, size_t bufsize)
1210                   _GL_ARG_NONNULL ((1, 2)));
1211 _GL_CXXALIAS_RPL (readlink, ssize_t,
1212                   (const char *file, char *buf, size_t bufsize));
1213 # else
1214 #  if !@HAVE_READLINK@
1215 _GL_FUNCDECL_SYS (readlink, ssize_t,
1216                   (const char *file, char *buf, size_t bufsize)
1217                   _GL_ARG_NONNULL ((1, 2)));
1218 #  endif
1219 _GL_CXXALIAS_SYS (readlink, ssize_t,
1220                   (const char *file, char *buf, size_t bufsize));
1221 # endif
1222 _GL_CXXALIASWARN (readlink);
1223 #elif defined GNULIB_POSIXCHECK
1224 # undef readlink
1225 # if HAVE_RAW_DECL_READLINK
1226 _GL_WARN_ON_USE (readlink, "readlink is unportable - "
1227                  "use gnulib module readlink for portability");
1228 # endif
1229 #endif
1230
1231
1232 #if @GNULIB_READLINKAT@
1233 # if !@HAVE_READLINKAT@
1234 _GL_FUNCDECL_SYS (readlinkat, ssize_t,
1235                   (int fd, char const *file, char *buf, size_t len)
1236                   _GL_ARG_NONNULL ((2, 3)));
1237 # endif
1238 _GL_CXXALIAS_SYS (readlinkat, ssize_t,
1239                   (int fd, char const *file, char *buf, size_t len));
1240 _GL_CXXALIASWARN (readlinkat);
1241 #elif defined GNULIB_POSIXCHECK
1242 # undef readlinkat
1243 # if HAVE_RAW_DECL_READLINKAT
1244 _GL_WARN_ON_USE (readlinkat, "readlinkat is not portable - "
1245                  "use gnulib module readlinkat for portability");
1246 # endif
1247 #endif
1248
1249
1250 #if @GNULIB_RMDIR@
1251 /* Remove the directory DIR.  */
1252 # if @REPLACE_RMDIR@
1253 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1254 #   define rmdir rpl_rmdir
1255 #  endif
1256 _GL_FUNCDECL_RPL (rmdir, int, (char const *name) _GL_ARG_NONNULL ((1)));
1257 _GL_CXXALIAS_RPL (rmdir, int, (char const *name));
1258 # else
1259 _GL_CXXALIAS_SYS (rmdir, int, (char const *name));
1260 # endif
1261 _GL_CXXALIASWARN (rmdir);
1262 #elif defined GNULIB_POSIXCHECK
1263 # undef rmdir
1264 # if HAVE_RAW_DECL_RMDIR
1265 _GL_WARN_ON_USE (rmdir, "rmdir is unportable - "
1266                  "use gnulib module rmdir for portability");
1267 # endif
1268 #endif
1269
1270
1271 #if @GNULIB_SETHOSTNAME@
1272 /* Set the host name of the machine.
1273    The host name may or may not be fully qualified.
1274
1275    Put LEN bytes of NAME into the host name.
1276    Return 0 if successful, otherwise, set errno and return -1.
1277
1278    Platforms with no ability to set the hostname return -1 and set
1279    errno = ENOSYS.  */
1280 # if !@HAVE_SETHOSTNAME@ || !@HAVE_DECL_SETHOSTNAME@
1281 _GL_FUNCDECL_SYS (sethostname, int, (const char *name, size_t len)
1282                                     _GL_ARG_NONNULL ((1)));
1283 # endif
1284 /* Need to cast, because on Solaris 11 2011-10, MacOS X 10.5, IRIX 6.5
1285    and FreeBSD 6.4 the second parameter is int.  On Solaris 11
1286    2011-10, the first parameter is not const.  */
1287 _GL_CXXALIAS_SYS_CAST (sethostname, int, (const char *name, size_t len));
1288 _GL_CXXALIASWARN (sethostname);
1289 #elif defined GNULIB_POSIXCHECK
1290 # undef sethostname
1291 # if HAVE_RAW_DECL_SETHOSTNAME
1292 _GL_WARN_ON_USE (sethostname, "sethostname is unportable - "
1293                  "use gnulib module sethostname for portability");
1294 # endif
1295 #endif
1296
1297
1298 #if @GNULIB_SLEEP@
1299 /* Pause the execution of the current thread for N seconds.
1300    Returns the number of seconds left to sleep.
1301    See the POSIX:2008 specification
1302    <http://pubs.opengroup.org/onlinepubs/9699919799/functions/sleep.html>.  */
1303 # if @REPLACE_SLEEP@
1304 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1305 #   undef sleep
1306 #   define sleep rpl_sleep
1307 #  endif
1308 _GL_FUNCDECL_RPL (sleep, unsigned int, (unsigned int n));
1309 _GL_CXXALIAS_RPL (sleep, unsigned int, (unsigned int n));
1310 # else
1311 #  if !@HAVE_SLEEP@
1312 _GL_FUNCDECL_SYS (sleep, unsigned int, (unsigned int n));
1313 #  endif
1314 _GL_CXXALIAS_SYS (sleep, unsigned int, (unsigned int n));
1315 # endif
1316 _GL_CXXALIASWARN (sleep);
1317 #elif defined GNULIB_POSIXCHECK
1318 # undef sleep
1319 # if HAVE_RAW_DECL_SLEEP
1320 _GL_WARN_ON_USE (sleep, "sleep is unportable - "
1321                  "use gnulib module sleep for portability");
1322 # endif
1323 #endif
1324
1325
1326 #if @GNULIB_SYMLINK@
1327 # if @REPLACE_SYMLINK@
1328 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1329 #   undef symlink
1330 #   define symlink rpl_symlink
1331 #  endif
1332 _GL_FUNCDECL_RPL (symlink, int, (char const *contents, char const *file)
1333                                 _GL_ARG_NONNULL ((1, 2)));
1334 _GL_CXXALIAS_RPL (symlink, int, (char const *contents, char const *file));
1335 # else
1336 #  if !@HAVE_SYMLINK@
1337 _GL_FUNCDECL_SYS (symlink, int, (char const *contents, char const *file)
1338                                 _GL_ARG_NONNULL ((1, 2)));
1339 #  endif
1340 _GL_CXXALIAS_SYS (symlink, int, (char const *contents, char const *file));
1341 # endif
1342 _GL_CXXALIASWARN (symlink);
1343 #elif defined GNULIB_POSIXCHECK
1344 # undef symlink
1345 # if HAVE_RAW_DECL_SYMLINK
1346 _GL_WARN_ON_USE (symlink, "symlink is not portable - "
1347                  "use gnulib module symlink for portability");
1348 # endif
1349 #endif
1350
1351
1352 #if @GNULIB_SYMLINKAT@
1353 # if !@HAVE_SYMLINKAT@
1354 _GL_FUNCDECL_SYS (symlinkat, int,
1355                   (char const *contents, int fd, char const *file)
1356                   _GL_ARG_NONNULL ((1, 3)));
1357 # endif
1358 _GL_CXXALIAS_SYS (symlinkat, int,
1359                   (char const *contents, int fd, char const *file));
1360 _GL_CXXALIASWARN (symlinkat);
1361 #elif defined GNULIB_POSIXCHECK
1362 # undef symlinkat
1363 # if HAVE_RAW_DECL_SYMLINKAT
1364 _GL_WARN_ON_USE (symlinkat, "symlinkat is not portable - "
1365                  "use gnulib module symlinkat for portability");
1366 # endif
1367 #endif
1368
1369
1370 #if @GNULIB_TTYNAME_R@
1371 /* Store at most BUFLEN characters of the pathname of the terminal FD is
1372    open on in BUF.  Return 0 on success, otherwise an error number.  */
1373 # if @REPLACE_TTYNAME_R@
1374 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1375 #   undef ttyname_r
1376 #   define ttyname_r rpl_ttyname_r
1377 #  endif
1378 _GL_FUNCDECL_RPL (ttyname_r, int,
1379                   (int fd, char *buf, size_t buflen) _GL_ARG_NONNULL ((2)));
1380 _GL_CXXALIAS_RPL (ttyname_r, int,
1381                   (int fd, char *buf, size_t buflen));
1382 # else
1383 #  if !@HAVE_DECL_TTYNAME_R@
1384 _GL_FUNCDECL_SYS (ttyname_r, int,
1385                   (int fd, char *buf, size_t buflen) _GL_ARG_NONNULL ((2)));
1386 #  endif
1387 _GL_CXXALIAS_SYS (ttyname_r, int,
1388                   (int fd, char *buf, size_t buflen));
1389 # endif
1390 _GL_CXXALIASWARN (ttyname_r);
1391 #elif defined GNULIB_POSIXCHECK
1392 # undef ttyname_r
1393 # if HAVE_RAW_DECL_TTYNAME_R
1394 _GL_WARN_ON_USE (ttyname_r, "ttyname_r is not portable - "
1395                  "use gnulib module ttyname_r for portability");
1396 # endif
1397 #endif
1398
1399
1400 #if @GNULIB_UNLINK@
1401 # if @REPLACE_UNLINK@
1402 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1403 #   undef unlink
1404 #   define unlink rpl_unlink
1405 #  endif
1406 _GL_FUNCDECL_RPL (unlink, int, (char const *file) _GL_ARG_NONNULL ((1)));
1407 _GL_CXXALIAS_RPL (unlink, int, (char const *file));
1408 # else
1409 _GL_CXXALIAS_SYS (unlink, int, (char const *file));
1410 # endif
1411 _GL_CXXALIASWARN (unlink);
1412 #elif defined GNULIB_POSIXCHECK
1413 # undef unlink
1414 # if HAVE_RAW_DECL_UNLINK
1415 _GL_WARN_ON_USE (unlink, "unlink is not portable - "
1416                  "use gnulib module unlink for portability");
1417 # endif
1418 #endif
1419
1420
1421 #if @GNULIB_UNLINKAT@
1422 # if @REPLACE_UNLINKAT@
1423 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1424 #   undef unlinkat
1425 #   define unlinkat rpl_unlinkat
1426 #  endif
1427 _GL_FUNCDECL_RPL (unlinkat, int, (int fd, char const *file, int flag)
1428                                  _GL_ARG_NONNULL ((2)));
1429 _GL_CXXALIAS_RPL (unlinkat, int, (int fd, char const *file, int flag));
1430 # else
1431 #  if !@HAVE_UNLINKAT@
1432 _GL_FUNCDECL_SYS (unlinkat, int, (int fd, char const *file, int flag)
1433                                  _GL_ARG_NONNULL ((2)));
1434 #  endif
1435 _GL_CXXALIAS_SYS (unlinkat, int, (int fd, char const *file, int flag));
1436 # endif
1437 _GL_CXXALIASWARN (unlinkat);
1438 #elif defined GNULIB_POSIXCHECK
1439 # undef unlinkat
1440 # if HAVE_RAW_DECL_UNLINKAT
1441 _GL_WARN_ON_USE (unlinkat, "unlinkat is not portable - "
1442                  "use gnulib module openat for portability");
1443 # endif
1444 #endif
1445
1446
1447 #if @GNULIB_USLEEP@
1448 /* Pause the execution of the current thread for N microseconds.
1449    Returns 0 on completion, or -1 on range error.
1450    See the POSIX:2001 specification
1451    <http://www.opengroup.org/susv3xsh/usleep.html>.  */
1452 # if @REPLACE_USLEEP@
1453 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1454 #   undef usleep
1455 #   define usleep rpl_usleep
1456 #  endif
1457 _GL_FUNCDECL_RPL (usleep, int, (useconds_t n));
1458 _GL_CXXALIAS_RPL (usleep, int, (useconds_t n));
1459 # else
1460 #  if !@HAVE_USLEEP@
1461 _GL_FUNCDECL_SYS (usleep, int, (useconds_t n));
1462 #  endif
1463 _GL_CXXALIAS_SYS (usleep, int, (useconds_t n));
1464 # endif
1465 _GL_CXXALIASWARN (usleep);
1466 #elif defined GNULIB_POSIXCHECK
1467 # undef usleep
1468 # if HAVE_RAW_DECL_USLEEP
1469 _GL_WARN_ON_USE (usleep, "usleep is unportable - "
1470                  "use gnulib module usleep for portability");
1471 # endif
1472 #endif
1473
1474
1475 #if @GNULIB_WRITE@
1476 /* Write up to COUNT bytes starting at BUF to file descriptor FD.
1477    See the POSIX:2008 specification
1478    <http://pubs.opengroup.org/onlinepubs/9699919799/functions/write.html>.  */
1479 # if @REPLACE_WRITE@
1480 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1481 #   undef write
1482 #   define write rpl_write
1483 #  endif
1484 _GL_FUNCDECL_RPL (write, ssize_t, (int fd, const void *buf, size_t count)
1485                                   _GL_ARG_NONNULL ((2)));
1486 _GL_CXXALIAS_RPL (write, ssize_t, (int fd, const void *buf, size_t count));
1487 # else
1488 /* Need to cast, because on mingw, the third parameter is
1489                                                              unsigned int count
1490    and the return type is 'int'.  */
1491 _GL_CXXALIAS_SYS_CAST (write, ssize_t, (int fd, const void *buf, size_t count));
1492 # endif
1493 _GL_CXXALIASWARN (write);
1494 #endif
1495
1496
1497 #endif /* _@GUARD_PREFIX@_UNISTD_H */
1498 #endif /* _@GUARD_PREFIX@_UNISTD_H */