gl/unistd.in.h

   1 /* Substitute for and wrapper around <unistd.h>.
   2    Copyright (C) 2003-2012 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 #if __GNUC__ >= 3
  18 @PRAGMA_SYSTEM_HEADER@
  19 #endif
  20 @PRAGMA_COLUMNS@
  21
  22 /* Special invocation convention:
  23    - On mingw, several headers, including <winsock2.h>, include <unistd.h>,
  24      but we need to ensure that both the system <unistd.h> and <winsock2.h>
  25      are completely included before we replace gethostname.  */
  26 #if @GNULIB_GETHOSTNAME@ && @UNISTD_H_HAVE_WINSOCK2_H@ \
  27   && !defined _GL_WINSOCK2_H_WITNESS && defined _WINSOCK2_H
  28 /* <unistd.h> is being indirectly included for the first time from
  29    <winsock2.h>; avoid declaring any overrides.  */
  30 # if @HAVE_UNISTD_H@
  31 #  @INCLUDE_NEXT@ @NEXT_UNISTD_H@
  32 # else
  33 #  error unexpected; report this to bug-gnulib@gnu.org
  34 # endif
  35 # define _GL_WINSOCK2_H_WITNESS
  36
  37 /* Normal invocation.  */
  38 #elif !defined _@GUARD_PREFIX@_UNISTD_H
  39
  40 /* The include_next requires a split double-inclusion guard.  */
  41 #if @HAVE_UNISTD_H@
  42 # @INCLUDE_NEXT@ @NEXT_UNISTD_H@
  43 #endif
  44
  45 /* Get all possible declarations of gethostname().  */
  46 #if @GNULIB_GETHOSTNAME@ && @UNISTD_H_HAVE_WINSOCK2_H@ \
  47   && !defined _GL_INCLUDING_WINSOCK2_H
  48 # define _GL_INCLUDING_WINSOCK2_H
  49 # include <winsock2.h>
  50 # undef _GL_INCLUDING_WINSOCK2_H
  51 #endif
  52
  53 #if !defined _@GUARD_PREFIX@_UNISTD_H && !defined _GL_INCLUDING_WINSOCK2_H
  54 #define _@GUARD_PREFIX@_UNISTD_H
  55
  56 /* NetBSD 5.0 mis-defines NULL.  Also get size_t.  */
  57 #include <stddef.h>
  58
  59 /* mingw doesn't define the SEEK_* or *_FILENO macros in <unistd.h>.  */
  60 /* Cygwin 1.7.1 declares symlinkat in <stdio.h>, not in <unistd.h>.  */
  61 /* But avoid namespace pollution on glibc systems.  */
  62 #if (!(defined SEEK_CUR && defined SEEK_END && defined SEEK_SET) \
  63      || ((@GNULIB_SYMLINKAT@ || defined GNULIB_POSIXCHECK) \
  64          && defined __CYGWIN__)) \
  65     && ! defined __GLIBC__
  66 # include <stdio.h>
  67 #endif
  68
  69 /* Cygwin 1.7.1 declares unlinkat in <fcntl.h>, not in <unistd.h>.  */
  70 /* But avoid namespace pollution on glibc systems.  */
  71 #if (@GNULIB_UNLINKAT@ || defined GNULIB_POSIXCHECK) && defined __CYGWIN__ \
  72     && ! defined __GLIBC__
  73 # include <fcntl.h>
  74 #endif
  75
  76 /* mingw fails to declare _exit in <unistd.h>.  */
  77 /* mingw, MSVC, BeOS, Haiku declare environ in <stdlib.h>, not in
  78    <unistd.h>.  */
  79 /* Solaris declares getcwd not only in <unistd.h> but also in <stdlib.h>.  */
  80 /* But avoid namespace pollution on glibc systems.  */
  81 #ifndef __GLIBC__
  82 # include <stdlib.h>
  83 #endif
  84
  85 /* Native Windows platforms declare chdir, getcwd, rmdir in
  86    <io.h> and/or <direct.h>, not in <unistd.h>.
  87    They also declare access(), chmod(), close(), dup(), dup2(), isatty(),
  88    lseek(), read(), unlink(), write() in <io.h>.  */
  89 #if ((@GNULIB_CHDIR@ || @GNULIB_GETCWD@ || @GNULIB_RMDIR@ \
  90       || defined GNULIB_POSIXCHECK) \
  91      && ((defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__))
  92 # include <io.h>     /* mingw32, mingw64 */
  93 # include <direct.h> /* mingw64, MSVC 9 */
  94 #elif (@GNULIB_CLOSE@ || @GNULIB_DUP@ || @GNULIB_DUP2@ || @GNULIB_ISATTY@ \
  95        || @GNULIB_LSEEK@ || @GNULIB_READ@ || @GNULIB_UNLINK@ || @GNULIB_WRITE@ \
  96        || defined GNULIB_POSIXCHECK) \
  97       && ((defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__)
  98 # include <io.h>
  99 #endif
 100
 101 /* AIX and OSF/1 5.1 declare getdomainname in <netdb.h>, not in <unistd.h>.
 102    NonStop Kernel declares gethostname in <netdb.h>, not in <unistd.h>.  */
 103 /* But avoid namespace pollution on glibc systems.  */
 104 #if ((@GNULIB_GETDOMAINNAME@ && (defined _AIX || defined __osf__)) \
 105      || (@GNULIB_GETHOSTNAME@ && defined __TANDEM)) \
 106     && !defined __GLIBC__
 107 # include <netdb.h>
 108 #endif
 109
 110 /* MSVC defines off_t in <sys/types.h>.  */
 111 #if !@HAVE_UNISTD_H@
 112 /* Get off_t.  */
 113 # include <sys/types.h>
 114 #endif
 115
 116 #if (@GNULIB_READ@ || @GNULIB_WRITE@ \
 117      || @GNULIB_READLINK@ || @GNULIB_READLINKAT@ \
 118      || @GNULIB_PREAD@ || @GNULIB_PWRITE@ || defined GNULIB_POSIXCHECK)
 119 /* Get ssize_t.  */
 120 # include <sys/types.h>
 121 #endif
 122
 123 /* Get getopt(), optarg, optind, opterr, optopt.
 124    But avoid namespace pollution on glibc systems.  */
 125 #if @GNULIB_UNISTD_H_GETOPT@ && !defined __GLIBC__ && !defined _GL_SYSTEM_GETOPT
 126 # include <getopt.h>
 127 #endif
 128
 129 /* The definitions of _GL_FUNCDECL_RPL etc. are copied here.  */
 130
 131 /* The definition of _GL_ARG_NONNULL is copied here.  */
 132
 133 /* The definition of _GL_WARN_ON_USE is copied here.  */
 134
 135
 136 /* Hide some function declarations from <winsock2.h>.  */
 137
 138 #if @GNULIB_GETHOSTNAME@ && @UNISTD_H_HAVE_WINSOCK2_H@
 139 # if !defined _@GUARD_PREFIX@_SYS_SOCKET_H
 140 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 141 #   undef socket
 142 #   define socket              socket_used_without_including_sys_socket_h
 143 #   undef connect
 144 #   define connect             connect_used_without_including_sys_socket_h
 145 #   undef accept
 146 #   define accept              accept_used_without_including_sys_socket_h
 147 #   undef bind
 148 #   define bind                bind_used_without_including_sys_socket_h
 149 #   undef getpeername
 150 #   define getpeername         getpeername_used_without_including_sys_socket_h
 151 #   undef getsockname
 152 #   define getsockname         getsockname_used_without_including_sys_socket_h
 153 #   undef getsockopt
 154 #   define getsockopt          getsockopt_used_without_including_sys_socket_h
 155 #   undef listen
 156 #   define listen              listen_used_without_including_sys_socket_h
 157 #   undef recv
 158 #   define recv                recv_used_without_including_sys_socket_h
 159 #   undef send
 160 #   define send                send_used_without_including_sys_socket_h
 161 #   undef recvfrom
 162 #   define recvfrom            recvfrom_used_without_including_sys_socket_h
 163 #   undef sendto
 164 #   define sendto              sendto_used_without_including_sys_socket_h
 165 #   undef setsockopt
 166 #   define setsockopt          setsockopt_used_without_including_sys_socket_h
 167 #   undef shutdown
 168 #   define shutdown            shutdown_used_without_including_sys_socket_h
 169 #  else
 170     _GL_WARN_ON_USE (socket,
 171                      "socket() used without including <sys/socket.h>");
 172     _GL_WARN_ON_USE (connect,
 173                      "connect() used without including <sys/socket.h>");
 174     _GL_WARN_ON_USE (accept,
 175                      "accept() used without including <sys/socket.h>");
 176     _GL_WARN_ON_USE (bind,
 177                      "bind() used without including <sys/socket.h>");
 178     _GL_WARN_ON_USE (getpeername,
 179                      "getpeername() used without including <sys/socket.h>");
 180     _GL_WARN_ON_USE (getsockname,
 181                      "getsockname() used without including <sys/socket.h>");
 182     _GL_WARN_ON_USE (getsockopt,
 183                      "getsockopt() used without including <sys/socket.h>");
 184     _GL_WARN_ON_USE (listen,
 185                      "listen() used without including <sys/socket.h>");
 186     _GL_WARN_ON_USE (recv,
 187                      "recv() used without including <sys/socket.h>");
 188     _GL_WARN_ON_USE (send,
 189                      "send() used without including <sys/socket.h>");
 190     _GL_WARN_ON_USE (recvfrom,
 191                      "recvfrom() used without including <sys/socket.h>");
 192     _GL_WARN_ON_USE (sendto,
 193                      "sendto() used without including <sys/socket.h>");
 194     _GL_WARN_ON_USE (setsockopt,
 195                      "setsockopt() used without including <sys/socket.h>");
 196     _GL_WARN_ON_USE (shutdown,
 197                      "shutdown() used without including <sys/socket.h>");
 198 #  endif
 199 # endif
 200 # if !defined _@GUARD_PREFIX@_SYS_SELECT_H
 201 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 202 #   undef select
 203 #   define select              select_used_without_including_sys_select_h
 204 #  else
 205     _GL_WARN_ON_USE (select,
 206                      "select() used without including <sys/select.h>");
 207 #  endif
 208 # endif
 209 #endif
 210
 211
 212 /* OS/2 EMX lacks these macros.  */
 213 #ifndef STDIN_FILENO
 214 # define STDIN_FILENO 0
 215 #endif
 216 #ifndef STDOUT_FILENO
 217 # define STDOUT_FILENO 1
 218 #endif
 219 #ifndef STDERR_FILENO
 220 # define STDERR_FILENO 2
 221 #endif
 222
 223 /* Ensure *_OK macros exist.  */
 224 #ifndef F_OK
 225 # define F_OK 0
 226 # define X_OK 1
 227 # define W_OK 2
 228 # define R_OK 4
 229 #endif
 230
 231
 232 /* Declare overridden functions.  */
 233
 234
 235 #if defined GNULIB_POSIXCHECK
 236 /* The access() function is a security risk.  */
 237 _GL_WARN_ON_USE (access, "the access function is a security risk - "
 238                  "use the gnulib module faccessat instead");
 239 #endif
 240
 241
 242 #if @GNULIB_CHDIR@
 243 _GL_CXXALIAS_SYS (chdir, int, (const char *file) _GL_ARG_NONNULL ((1)));
 244 _GL_CXXALIASWARN (chdir);
 245 #elif defined GNULIB_POSIXCHECK
 246 # undef chdir
 247 # if HAVE_RAW_DECL_CHDIR
 248 _GL_WARN_ON_USE (chown, "chdir is not always in <unistd.h> - "
 249                  "use gnulib module chdir for portability");
 250 # endif
 251 #endif
 252
 253
 254 #if @GNULIB_CHOWN@
 255 /* Change the owner of FILE to UID (if UID is not -1) and the group of FILE
 256    to GID (if GID is not -1).  Follow symbolic links.
 257    Return 0 if successful, otherwise -1 and errno set.
 258    See the POSIX:2008 specification
 259    <http://pubs.opengroup.org/onlinepubs/9699919799/functions/chown.html.  */
 260 # if @REPLACE_CHOWN@
 261 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 262 #   undef chown
 263 #   define chown rpl_chown
 264 #  endif
 265 _GL_FUNCDECL_RPL (chown, int, (const char *file, uid_t uid, gid_t gid)
 266                               _GL_ARG_NONNULL ((1)));
 267 _GL_CXXALIAS_RPL (chown, int, (const char *file, uid_t uid, gid_t gid));
 268 # else
 269 #  if !@HAVE_CHOWN@
 270 _GL_FUNCDECL_SYS (chown, int, (const char *file, uid_t uid, gid_t gid)
 271                               _GL_ARG_NONNULL ((1)));
 272 #  endif
 273 _GL_CXXALIAS_SYS (chown, int, (const char *file, uid_t uid, gid_t gid));
 274 # endif
 275 _GL_CXXALIASWARN (chown);
 276 #elif defined GNULIB_POSIXCHECK
 277 # undef chown
 278 # if HAVE_RAW_DECL_CHOWN
 279 _GL_WARN_ON_USE (chown, "chown fails to follow symlinks on some systems and "
 280                  "doesn't treat a uid or gid of -1 on some systems - "
 281                  "use gnulib module chown for portability");
 282 # endif
 283 #endif
 284
 285
 286 #if @GNULIB_CLOSE@
 287 # if @REPLACE_CLOSE@
 288 /* Automatically included by modules that need a replacement for close.  */
 289 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 290 #   undef close
 291 #   define close rpl_close
 292 #  endif
 293 _GL_FUNCDECL_RPL (close, int, (int fd));
 294 _GL_CXXALIAS_RPL (close, int, (int fd));
 295 # else
 296 _GL_CXXALIAS_SYS (close, int, (int fd));
 297 # endif
 298 _GL_CXXALIASWARN (close);
 299 #elif @UNISTD_H_HAVE_WINSOCK2_H_AND_USE_SOCKETS@
 300 # undef close
 301 # define close close_used_without_requesting_gnulib_module_close
 302 #elif defined GNULIB_POSIXCHECK
 303 # undef close
 304 /* Assume close is always declared.  */
 305 _GL_WARN_ON_USE (close, "close does not portably work on sockets - "
 306                  "use gnulib module close for portability");
 307 #endif
 308
 309
 310 #if @GNULIB_DUP@
 311 # if @REPLACE_DUP@
 312 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 313 #   define dup rpl_dup
 314 #  endif
 315 _GL_FUNCDECL_RPL (dup, int, (int oldfd));
 316 _GL_CXXALIAS_RPL (dup, int, (int oldfd));
 317 # else
 318 _GL_CXXALIAS_SYS (dup, int, (int oldfd));
 319 # endif
 320 _GL_CXXALIASWARN (dup);
 321 #elif defined GNULIB_POSIXCHECK
 322 # undef dup
 323 # if HAVE_RAW_DECL_DUP
 324 _GL_WARN_ON_USE (dup, "dup is unportable - "
 325                  "use gnulib module dup for portability");
 326 # endif
 327 #endif
 328
 329
 330 #if @GNULIB_DUP2@
 331 /* Copy the file descriptor OLDFD into file descriptor NEWFD.  Do nothing if
 332    NEWFD = OLDFD, otherwise close NEWFD first if it is open.
 333    Return newfd if successful, otherwise -1 and errno set.
 334    See the POSIX:2008 specification
 335    <http://pubs.opengroup.org/onlinepubs/9699919799/functions/dup2.html>.  */
 336 # if @REPLACE_DUP2@
 337 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 338 #   define dup2 rpl_dup2
 339 #  endif
 340 _GL_FUNCDECL_RPL (dup2, int, (int oldfd, int newfd));
 341 _GL_CXXALIAS_RPL (dup2, int, (int oldfd, int newfd));
 342 # else
 343 #  if !@HAVE_DUP2@
 344 _GL_FUNCDECL_SYS (dup2, int, (int oldfd, int newfd));
 345 #  endif
 346 _GL_CXXALIAS_SYS (dup2, int, (int oldfd, int newfd));
 347 # endif
 348 _GL_CXXALIASWARN (dup2);
 349 #elif defined GNULIB_POSIXCHECK
 350 # undef dup2
 351 # if HAVE_RAW_DECL_DUP2
 352 _GL_WARN_ON_USE (dup2, "dup2 is unportable - "
 353                  "use gnulib module dup2 for portability");
 354 # endif
 355 #endif
 356
 357
 358 #if @GNULIB_DUP3@
 359 /* Copy the file descriptor OLDFD into file descriptor NEWFD, with the
 360    specified flags.
 361    The flags are a bitmask, possibly including O_CLOEXEC (defined in <fcntl.h>)
 362    and O_TEXT, O_BINARY (defined in "binary-io.h").
 363    Close NEWFD first if it is open.
 364    Return newfd if successful, otherwise -1 and errno set.
 365    See the Linux man page at
 366    <http://www.kernel.org/doc/man-pages/online/pages/man2/dup3.2.html>.  */
 367 # if @HAVE_DUP3@
 368 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 369 #   define dup3 rpl_dup3
 370 #  endif
 371 _GL_FUNCDECL_RPL (dup3, int, (int oldfd, int newfd, int flags));
 372 _GL_CXXALIAS_RPL (dup3, int, (int oldfd, int newfd, int flags));
 373 # else
 374 _GL_FUNCDECL_SYS (dup3, int, (int oldfd, int newfd, int flags));
 375 _GL_CXXALIAS_SYS (dup3, int, (int oldfd, int newfd, int flags));
 376 # endif
 377 _GL_CXXALIASWARN (dup3);
 378 #elif defined GNULIB_POSIXCHECK
 379 # undef dup3
 380 # if HAVE_RAW_DECL_DUP3
 381 _GL_WARN_ON_USE (dup3, "dup3 is unportable - "
 382                  "use gnulib module dup3 for portability");
 383 # endif
 384 #endif
 385
 386
 387 #if @GNULIB_ENVIRON@
 388 # if !@HAVE_DECL_ENVIRON@
 389 /* Set of environment variables and values.  An array of strings of the form
 390    "VARIABLE=VALUE", terminated with a NULL.  */
 391 #  if defined __APPLE__ && defined __MACH__
 392 #   include <crt_externs.h>
 393 #   define environ (*_NSGetEnviron ())
 394 #  else
 395 #   ifdef __cplusplus
 396 extern "C" {
 397 #   endif
 398 extern char **environ;
 399 #   ifdef __cplusplus
 400 }
 401 #   endif
 402 #  endif
 403 # endif
 404 #elif defined GNULIB_POSIXCHECK
 405 # if HAVE_RAW_DECL_ENVIRON
 406 static inline char ***
 407 rpl_environ (void)
 408 {
 409   return &environ;
 410 }
 411 _GL_WARN_ON_USE (rpl_environ, "environ is unportable - "
 412                  "use gnulib module environ for portability");
 413 #  undef environ
 414 #  define environ (*rpl_environ ())
 415 # endif
 416 #endif
 417
 418
 419 #if @GNULIB_EUIDACCESS@
 420 /* Like access(), except that it uses the effective user id and group id of
 421    the current process.  */
 422 # if !@HAVE_EUIDACCESS@
 423 _GL_FUNCDECL_SYS (euidaccess, int, (const char *filename, int mode)
 424                                    _GL_ARG_NONNULL ((1)));
 425 # endif
 426 _GL_CXXALIAS_SYS (euidaccess, int, (const char *filename, int mode));
 427 _GL_CXXALIASWARN (euidaccess);
 428 # if defined GNULIB_POSIXCHECK
 429 /* Like access(), this function is a security risk.  */
 430 _GL_WARN_ON_USE (euidaccess, "the euidaccess function is a security risk - "
 431                  "use the gnulib module faccessat instead");
 432 # endif
 433 #elif defined GNULIB_POSIXCHECK
 434 # undef euidaccess
 435 # if HAVE_RAW_DECL_EUIDACCESS
 436 _GL_WARN_ON_USE (euidaccess, "euidaccess is unportable - "
 437                  "use gnulib module euidaccess for portability");
 438 # endif
 439 #endif
 440
 441
 442 #if @GNULIB_FACCESSAT@
 443 # if !@HAVE_FACCESSAT@
 444 _GL_FUNCDECL_SYS (faccessat, int,
 445                   (int fd, char const *file, int mode, int flag)
 446                   _GL_ARG_NONNULL ((2)));
 447 # endif
 448 _GL_CXXALIAS_SYS (faccessat, int,
 449                   (int fd, char const *file, int mode, int flag));
 450 _GL_CXXALIASWARN (faccessat);
 451 #elif defined GNULIB_POSIXCHECK
 452 # undef faccessat
 453 # if HAVE_RAW_DECL_FACCESSAT
 454 _GL_WARN_ON_USE (faccessat, "faccessat is not portable - "
 455                  "use gnulib module faccessat for portability");
 456 # endif
 457 #endif
 458
 459
 460 #if @GNULIB_FCHDIR@
 461 /* Change the process' current working directory to the directory on which
 462    the given file descriptor is open.
 463    Return 0 if successful, otherwise -1 and errno set.
 464    See the POSIX:2008 specification
 465    <http://pubs.opengroup.org/onlinepubs/9699919799/functions/fchdir.html>.  */
 466 # if ! @HAVE_FCHDIR@
 467 _GL_FUNCDECL_SYS (fchdir, int, (int /*fd*/));
 468
 469 /* Gnulib internal hooks needed to maintain the fchdir metadata.  */
 470 _GL_EXTERN_C int _gl_register_fd (int fd, const char *filename)
 471      _GL_ARG_NONNULL ((2));
 472 _GL_EXTERN_C void _gl_unregister_fd (int fd);
 473 _GL_EXTERN_C int _gl_register_dup (int oldfd, int newfd);
 474 _GL_EXTERN_C const char *_gl_directory_name (int fd);
 475
 476 # else
 477 #  if !@HAVE_DECL_FCHDIR@
 478 _GL_FUNCDECL_SYS (fchdir, int, (int /*fd*/));
 479 #  endif
 480 # endif
 481 _GL_CXXALIAS_SYS (fchdir, int, (int /*fd*/));
 482 _GL_CXXALIASWARN (fchdir);
 483 #elif defined GNULIB_POSIXCHECK
 484 # undef fchdir
 485 # if HAVE_RAW_DECL_FCHDIR
 486 _GL_WARN_ON_USE (fchdir, "fchdir is unportable - "
 487                  "use gnulib module fchdir for portability");
 488 # endif
 489 #endif
 490
 491
 492 #if @GNULIB_FCHOWNAT@
 493 # if @REPLACE_FCHOWNAT@
 494 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 495 #   undef fchownat
 496 #   define fchownat rpl_fchownat
 497 #  endif
 498 _GL_FUNCDECL_RPL (fchownat, int, (int fd, char const *file,
 499                                   uid_t owner, gid_t group, int flag)
 500                                  _GL_ARG_NONNULL ((2)));
 501 _GL_CXXALIAS_RPL (fchownat, int, (int fd, char const *file,
 502                                   uid_t owner, gid_t group, int flag));
 503 # else
 504 #  if !@HAVE_FCHOWNAT@
 505 _GL_FUNCDECL_SYS (fchownat, int, (int fd, char const *file,
 506                                   uid_t owner, gid_t group, int flag)
 507                                  _GL_ARG_NONNULL ((2)));
 508 #  endif
 509 _GL_CXXALIAS_SYS (fchownat, int, (int fd, char const *file,
 510                                   uid_t owner, gid_t group, int flag));
 511 # endif
 512 _GL_CXXALIASWARN (fchownat);
 513 #elif defined GNULIB_POSIXCHECK
 514 # undef fchownat
 515 # if HAVE_RAW_DECL_FCHOWNAT
 516 _GL_WARN_ON_USE (fchownat, "fchownat is not portable - "
 517                  "use gnulib module openat for portability");
 518 # endif
 519 #endif
 520
 521
 522 #if @GNULIB_FDATASYNC@
 523 /* Synchronize changes to a file.
 524    Return 0 if successful, otherwise -1 and errno set.
 525    See POSIX:2008 specification
 526    <http://pubs.opengroup.org/onlinepubs/9699919799/functions/fdatasync.html>.  */
 527 # if !@HAVE_FDATASYNC@ || !@HAVE_DECL_FDATASYNC@
 528 _GL_FUNCDECL_SYS (fdatasync, int, (int fd));
 529 # endif
 530 _GL_CXXALIAS_SYS (fdatasync, int, (int fd));
 531 _GL_CXXALIASWARN (fdatasync);
 532 #elif defined GNULIB_POSIXCHECK
 533 # undef fdatasync
 534 # if HAVE_RAW_DECL_FDATASYNC
 535 _GL_WARN_ON_USE (fdatasync, "fdatasync is unportable - "
 536                  "use gnulib module fdatasync for portability");
 537 # endif
 538 #endif
 539
 540
 541 #if @GNULIB_FSYNC@
 542 /* Synchronize changes, including metadata, to a file.
 543    Return 0 if successful, otherwise -1 and errno set.
 544    See POSIX:2008 specification
 545    <http://pubs.opengroup.org/onlinepubs/9699919799/functions/fsync.html>.  */
 546 # if !@HAVE_FSYNC@
 547 _GL_FUNCDECL_SYS (fsync, int, (int fd));
 548 # endif
 549 _GL_CXXALIAS_SYS (fsync, int, (int fd));
 550 _GL_CXXALIASWARN (fsync);
 551 #elif defined GNULIB_POSIXCHECK
 552 # undef fsync
 553 # if HAVE_RAW_DECL_FSYNC
 554 _GL_WARN_ON_USE (fsync, "fsync is unportable - "
 555                  "use gnulib module fsync for portability");
 556 # endif
 557 #endif
 558
 559
 560 #if @GNULIB_FTRUNCATE@
 561 /* Change the size of the file to which FD is opened to become equal to LENGTH.
 562    Return 0 if successful, otherwise -1 and errno set.
 563    See the POSIX:2008 specification
 564    <http://pubs.opengroup.org/onlinepubs/9699919799/functions/ftruncate.html>.  */
 565 # if !@HAVE_FTRUNCATE@
 566 _GL_FUNCDECL_SYS (ftruncate, int, (int fd, off_t length));
 567 # endif
 568 _GL_CXXALIAS_SYS (ftruncate, int, (int fd, off_t length));
 569 _GL_CXXALIASWARN (ftruncate);
 570 #elif defined GNULIB_POSIXCHECK
 571 # undef ftruncate
 572 # if HAVE_RAW_DECL_FTRUNCATE
 573 _GL_WARN_ON_USE (ftruncate, "ftruncate is unportable - "
 574                  "use gnulib module ftruncate for portability");
 575 # endif
 576 #endif
 577
 578
 579 #if @GNULIB_GETCWD@
 580 /* Get the name of the current working directory, and put it in SIZE bytes
 581    of BUF.
 582    Return BUF if successful, or NULL if the directory couldn't be determined
 583    or SIZE was too small.
 584    See the POSIX:2008 specification
 585    <http://pubs.opengroup.org/onlinepubs/9699919799/functions/getcwd.html>.
 586    Additionally, the gnulib module 'getcwd' guarantees the following GNU
 587    extension: If BUF is NULL, an array is allocated with 'malloc'; the array
 588    is SIZE bytes long, unless SIZE == 0, in which case it is as big as
 589    necessary.  */
 590 # if @REPLACE_GETCWD@
 591 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 592 #   define getcwd rpl_getcwd
 593 #  endif
 594 _GL_FUNCDECL_RPL (getcwd, char *, (char *buf, size_t size));
 595 _GL_CXXALIAS_RPL (getcwd, char *, (char *buf, size_t size));
 596 # else
 597 /* Need to cast, because on mingw, the second parameter is
 598                                                    int size.  */
 599 _GL_CXXALIAS_SYS_CAST (getcwd, char *, (char *buf, size_t size));
 600 # endif
 601 _GL_CXXALIASWARN (getcwd);
 602 #elif defined GNULIB_POSIXCHECK
 603 # undef getcwd
 604 # if HAVE_RAW_DECL_GETCWD
 605 _GL_WARN_ON_USE (getcwd, "getcwd is unportable - "
 606                  "use gnulib module getcwd for portability");
 607 # endif
 608 #endif
 609
 610
 611 #if @GNULIB_GETDOMAINNAME@
 612 /* Return the NIS domain name of the machine.
 613    WARNING! The NIS domain name is unrelated to the fully qualified host name
 614             of the machine.  It is also unrelated to email addresses.
 615    WARNING! The NIS domain name is usually the empty string or "(none)" when
 616             not using NIS.
 617
 618    Put up to LEN bytes of the NIS domain name into NAME.
 619    Null terminate it if the name is shorter than LEN.
 620    If the NIS domain name is longer than LEN, set errno = EINVAL and return -1.
 621    Return 0 if successful, otherwise set errno and return -1.  */
 622 # if @REPLACE_GETDOMAINNAME@
 623 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 624 #   undef getdomainname
 625 #   define getdomainname rpl_getdomainname
 626 #  endif
 627 _GL_FUNCDECL_RPL (getdomainname, int, (char *name, size_t len)
 628                                       _GL_ARG_NONNULL ((1)));
 629 _GL_CXXALIAS_RPL (getdomainname, int, (char *name, size_t len));
 630 # else
 631 #  if !@HAVE_DECL_GETDOMAINNAME@
 632 _GL_FUNCDECL_SYS (getdomainname, int, (char *name, size_t len)
 633                                       _GL_ARG_NONNULL ((1)));
 634 #  endif
 635 _GL_CXXALIAS_SYS (getdomainname, int, (char *name, size_t len));
 636 # endif
 637 _GL_CXXALIASWARN (getdomainname);
 638 #elif defined GNULIB_POSIXCHECK
 639 # undef getdomainname
 640 # if HAVE_RAW_DECL_GETDOMAINNAME
 641 _GL_WARN_ON_USE (getdomainname, "getdomainname is unportable - "
 642                  "use gnulib module getdomainname for portability");
 643 # endif
 644 #endif
 645
 646
 647 #if @GNULIB_GETDTABLESIZE@
 648 /* Return the maximum number of file descriptors in the current process.
 649    In POSIX, this is same as sysconf (_SC_OPEN_MAX).  */
 650 # if !@HAVE_GETDTABLESIZE@
 651 _GL_FUNCDECL_SYS (getdtablesize, int, (void));
 652 # endif
 653 _GL_CXXALIAS_SYS (getdtablesize, int, (void));
 654 _GL_CXXALIASWARN (getdtablesize);
 655 #elif defined GNULIB_POSIXCHECK
 656 # undef getdtablesize
 657 # if HAVE_RAW_DECL_GETDTABLESIZE
 658 _GL_WARN_ON_USE (getdtablesize, "getdtablesize is unportable - "
 659                  "use gnulib module getdtablesize for portability");
 660 # endif
 661 #endif
 662
 663
 664 #if @GNULIB_GETGROUPS@
 665 /* Return the supplemental groups that the current process belongs to.
 666    It is unspecified whether the effective group id is in the list.
 667    If N is 0, return the group count; otherwise, N describes how many
 668    entries are available in GROUPS.  Return -1 and set errno if N is
 669    not 0 and not large enough.  Fails with ENOSYS on some systems.  */
 670 # if @REPLACE_GETGROUPS@
 671 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 672 #   undef getgroups
 673 #   define getgroups rpl_getgroups
 674 #  endif
 675 _GL_FUNCDECL_RPL (getgroups, int, (int n, gid_t *groups));
 676 _GL_CXXALIAS_RPL (getgroups, int, (int n, gid_t *groups));
 677 # else
 678 #  if !@HAVE_GETGROUPS@
 679 _GL_FUNCDECL_SYS (getgroups, int, (int n, gid_t *groups));
 680 #  endif
 681 _GL_CXXALIAS_SYS (getgroups, int, (int n, gid_t *groups));
 682 # endif
 683 _GL_CXXALIASWARN (getgroups);
 684 #elif defined GNULIB_POSIXCHECK
 685 # undef getgroups
 686 # if HAVE_RAW_DECL_GETGROUPS
 687 _GL_WARN_ON_USE (getgroups, "getgroups is unportable - "
 688                  "use gnulib module getgroups for portability");
 689 # endif
 690 #endif
 691
 692
 693 #if @GNULIB_GETHOSTNAME@
 694 /* Return the standard host name of the machine.
 695    WARNING! The host name may or may not be fully qualified.
 696
 697    Put up to LEN bytes of the host name into NAME.
 698    Null terminate it if the name is shorter than LEN.
 699    If the host name is longer than LEN, set errno = EINVAL and return -1.
 700    Return 0 if successful, otherwise set errno and return -1.  */
 701 # if @UNISTD_H_HAVE_WINSOCK2_H@
 702 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 703 #   undef gethostname
 704 #   define gethostname rpl_gethostname
 705 #  endif
 706 _GL_FUNCDECL_RPL (gethostname, int, (char *name, size_t len)
 707                                     _GL_ARG_NONNULL ((1)));
 708 _GL_CXXALIAS_RPL (gethostname, int, (char *name, size_t len));
 709 # else
 710 #  if !@HAVE_GETHOSTNAME@
 711 _GL_FUNCDECL_SYS (gethostname, int, (char *name, size_t len)
 712                                     _GL_ARG_NONNULL ((1)));
 713 #  endif
 714 /* Need to cast, because on Solaris 10 and OSF/1 5.1 systems, the second
 715    parameter is
 716                                                       int len.  */
 717 _GL_CXXALIAS_SYS_CAST (gethostname, int, (char *name, size_t len));
 718 # endif
 719 _GL_CXXALIASWARN (gethostname);
 720 #elif @UNISTD_H_HAVE_WINSOCK2_H@
 721 # undef gethostname
 722 # define gethostname gethostname_used_without_requesting_gnulib_module_gethostname
 723 #elif defined GNULIB_POSIXCHECK
 724 # undef gethostname
 725 # if HAVE_RAW_DECL_GETHOSTNAME
 726 _GL_WARN_ON_USE (gethostname, "gethostname is unportable - "
 727                  "use gnulib module gethostname for portability");
 728 # endif
 729 #endif
 730
 731
 732 #if @GNULIB_GETLOGIN@
 733 /* Returns the user's login name, or NULL if it cannot be found.  Upon error,
 734    returns NULL with errno set.
 735
 736    See <http://www.opengroup.org/susv3xsh/getlogin.html>.
 737
 738    Most programs don't need to use this function, because the information is
 739    available through environment variables:
 740      ${LOGNAME-$USER}        on Unix platforms,
 741      $USERNAME               on native Windows platforms.
 742  */
 743 # if !@HAVE_GETLOGIN@
 744 _GL_FUNCDECL_SYS (getlogin, char *, (void));
 745 # endif
 746 _GL_CXXALIAS_SYS (getlogin, char *, (void));
 747 _GL_CXXALIASWARN (getlogin);
 748 #elif defined GNULIB_POSIXCHECK
 749 # undef getlogin
 750 # if HAVE_RAW_DECL_GETLOGIN
 751 _GL_WARN_ON_USE (getlogin, "getlogin is unportable - "
 752                  "use gnulib module getlogin for portability");
 753 # endif
 754 #endif
 755
 756
 757 #if @GNULIB_GETLOGIN_R@
 758 /* Copies the user's login name to NAME.
 759    The array pointed to by NAME has room for SIZE bytes.
 760
 761    Returns 0 if successful.  Upon error, an error number is returned, or -1 in
 762    the case that the login name cannot be found but no specific error is
 763    provided (this case is hopefully rare but is left open by the POSIX spec).
 764
 765    See <http://www.opengroup.org/susv3xsh/getlogin.html>.
 766
 767    Most programs don't need to use this function, because the information is
 768    available through environment variables:
 769      ${LOGNAME-$USER}        on Unix platforms,
 770      $USERNAME               on native Windows platforms.
 771  */
 772 # if @REPLACE_GETLOGIN_R@
 773 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 774 #   define getlogin_r rpl_getlogin_r
 775 #  endif
 776 _GL_FUNCDECL_RPL (getlogin_r, int, (char *name, size_t size)
 777                                    _GL_ARG_NONNULL ((1)));
 778 _GL_CXXALIAS_RPL (getlogin_r, int, (char *name, size_t size));
 779 # else
 780 #  if !@HAVE_DECL_GETLOGIN_R@
 781 _GL_FUNCDECL_SYS (getlogin_r, int, (char *name, size_t size)
 782                                    _GL_ARG_NONNULL ((1)));
 783 #  endif
 784 /* Need to cast, because on Solaris 10 systems, the second argument is
 785                                                      int size.  */
 786 _GL_CXXALIAS_SYS_CAST (getlogin_r, int, (char *name, size_t size));
 787 # endif
 788 _GL_CXXALIASWARN (getlogin_r);
 789 #elif defined GNULIB_POSIXCHECK
 790 # undef getlogin_r
 791 # if HAVE_RAW_DECL_GETLOGIN_R
 792 _GL_WARN_ON_USE (getlogin_r, "getlogin_r is unportable - "
 793                  "use gnulib module getlogin_r for portability");
 794 # endif
 795 #endif
 796
 797
 798 #if @GNULIB_GETPAGESIZE@
 799 # if @REPLACE_GETPAGESIZE@
 800 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 801 #   define getpagesize rpl_getpagesize
 802 #  endif
 803 _GL_FUNCDECL_RPL (getpagesize, int, (void));
 804 _GL_CXXALIAS_RPL (getpagesize, int, (void));
 805 # else
 806 #  if !@HAVE_GETPAGESIZE@
 807 #   if !defined getpagesize
 808 /* This is for POSIX systems.  */
 809 #    if !defined _gl_getpagesize && defined _SC_PAGESIZE
 810 #     if ! (defined __VMS && __VMS_VER < 70000000)
 811 #      define _gl_getpagesize() sysconf (_SC_PAGESIZE)
 812 #     endif
 813 #    endif
 814 /* This is for older VMS.  */
 815 #    if !defined _gl_getpagesize && defined __VMS
 816 #     ifdef __ALPHA
 817 #      define _gl_getpagesize() 8192
 818 #     else
 819 #      define _gl_getpagesize() 512
 820 #     endif
 821 #    endif
 822 /* This is for BeOS.  */
 823 #    if !defined _gl_getpagesize && @HAVE_OS_H@
 824 #     include <OS.h>
 825 #     if defined B_PAGE_SIZE
 826 #      define _gl_getpagesize() B_PAGE_SIZE
 827 #     endif
 828 #    endif
 829 /* This is for AmigaOS4.0.  */
 830 #    if !defined _gl_getpagesize && defined __amigaos4__
 831 #     define _gl_getpagesize() 2048
 832 #    endif
 833 /* This is for older Unix systems.  */
 834 #    if !defined _gl_getpagesize && @HAVE_SYS_PARAM_H@
 835 #     include <sys/param.h>
 836 #     ifdef EXEC_PAGESIZE
 837 #      define _gl_getpagesize() EXEC_PAGESIZE
 838 #     else
 839 #      ifdef NBPG
 840 #       ifndef CLSIZE
 841 #        define CLSIZE 1
 842 #       endif
 843 #       define _gl_getpagesize() (NBPG * CLSIZE)
 844 #      else
 845 #       ifdef NBPC
 846 #        define _gl_getpagesize() NBPC
 847 #       endif
 848 #      endif
 849 #     endif
 850 #    endif
 851 #    if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 852 #     define getpagesize() _gl_getpagesize ()
 853 #    else
 854 #     if !GNULIB_defined_getpagesize_function
 855 static inline int
 856 getpagesize ()
 857 {
 858   return _gl_getpagesize ();
 859 }
 860 #      define GNULIB_defined_getpagesize_function 1
 861 #     endif
 862 #    endif
 863 #   endif
 864 #  endif
 865 /* Need to cast, because on Cygwin 1.5.x systems, the return type is size_t.  */
 866 _GL_CXXALIAS_SYS_CAST (getpagesize, int, (void));
 867 # endif
 868 # if @HAVE_DECL_GETPAGESIZE@
 869 _GL_CXXALIASWARN (getpagesize);
 870 # endif
 871 #elif defined GNULIB_POSIXCHECK
 872 # undef getpagesize
 873 # if HAVE_RAW_DECL_GETPAGESIZE
 874 _GL_WARN_ON_USE (getpagesize, "getpagesize is unportable - "
 875                  "use gnulib module getpagesize for portability");
 876 # endif
 877 #endif
 878
 879
 880 #if @GNULIB_GETUSERSHELL@
 881 /* Return the next valid login shell on the system, or NULL when the end of
 882    the list has been reached.  */
 883 # if !@HAVE_DECL_GETUSERSHELL@
 884 _GL_FUNCDECL_SYS (getusershell, char *, (void));
 885 # endif
 886 _GL_CXXALIAS_SYS (getusershell, char *, (void));
 887 _GL_CXXALIASWARN (getusershell);
 888 #elif defined GNULIB_POSIXCHECK
 889 # undef getusershell
 890 # if HAVE_RAW_DECL_GETUSERSHELL
 891 _GL_WARN_ON_USE (getusershell, "getusershell is unportable - "
 892                  "use gnulib module getusershell for portability");
 893 # endif
 894 #endif
 895
 896 #if @GNULIB_GETUSERSHELL@
 897 /* Rewind to pointer that is advanced at each getusershell() call.  */
 898 # if !@HAVE_DECL_GETUSERSHELL@
 899 _GL_FUNCDECL_SYS (setusershell, void, (void));
 900 # endif
 901 _GL_CXXALIAS_SYS (setusershell, void, (void));
 902 _GL_CXXALIASWARN (setusershell);
 903 #elif defined GNULIB_POSIXCHECK
 904 # undef setusershell
 905 # if HAVE_RAW_DECL_SETUSERSHELL
 906 _GL_WARN_ON_USE (setusershell, "setusershell is unportable - "
 907                  "use gnulib module getusershell for portability");
 908 # endif
 909 #endif
 910
 911 #if @GNULIB_GETUSERSHELL@
 912 /* Free the pointer that is advanced at each getusershell() call and
 913    associated resources.  */
 914 # if !@HAVE_DECL_GETUSERSHELL@
 915 _GL_FUNCDECL_SYS (endusershell, void, (void));
 916 # endif
 917 _GL_CXXALIAS_SYS (endusershell, void, (void));
 918 _GL_CXXALIASWARN (endusershell);
 919 #elif defined GNULIB_POSIXCHECK
 920 # undef endusershell
 921 # if HAVE_RAW_DECL_ENDUSERSHELL
 922 _GL_WARN_ON_USE (endusershell, "endusershell is unportable - "
 923                  "use gnulib module getusershell for portability");
 924 # endif
 925 #endif
 926
 927
 928 #if @GNULIB_GROUP_MEMBER@
 929 /* Determine whether group id is in calling user's group list.  */
 930 # if !@HAVE_GROUP_MEMBER@
 931 _GL_FUNCDECL_SYS (group_member, int, (gid_t gid));
 932 # endif
 933 _GL_CXXALIAS_SYS (group_member, int, (gid_t gid));
 934 _GL_CXXALIASWARN (group_member);
 935 #elif defined GNULIB_POSIXCHECK
 936 # undef group_member
 937 # if HAVE_RAW_DECL_GROUP_MEMBER
 938 _GL_WARN_ON_USE (group_member, "group_member is unportable - "
 939                  "use gnulib module group-member for portability");
 940 # endif
 941 #endif
 942
 943
 944 #if @GNULIB_ISATTY@
 945 # if @REPLACE_ISATTY@
 946 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 947 #   undef isatty
 948 #   define isatty rpl_isatty
 949 #  endif
 950 _GL_FUNCDECL_RPL (isatty, int, (int fd));
 951 _GL_CXXALIAS_RPL (isatty, int, (int fd));
 952 # else
 953 _GL_CXXALIAS_SYS (isatty, int, (int fd));
 954 # endif
 955 _GL_CXXALIASWARN (isatty);
 956 #elif defined GNULIB_POSIXCHECK
 957 # undef isatty
 958 # if HAVE_RAW_DECL_ISATTY
 959 _GL_WARN_ON_USE (isatty, "isatty has portability problems on native Windows - "
 960                  "use gnulib module isatty for portability");
 961 # endif
 962 #endif
 963
 964
 965 #if @GNULIB_LCHOWN@
 966 /* Change the owner of FILE to UID (if UID is not -1) and the group of FILE
 967    to GID (if GID is not -1).  Do not follow symbolic links.
 968    Return 0 if successful, otherwise -1 and errno set.
 969    See the POSIX:2008 specification
 970    <http://pubs.opengroup.org/onlinepubs/9699919799/functions/lchown.html>.  */
 971 # if @REPLACE_LCHOWN@
 972 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 973 #   undef lchown
 974 #   define lchown rpl_lchown
 975 #  endif
 976 _GL_FUNCDECL_RPL (lchown, int, (char const *file, uid_t owner, gid_t group)
 977                                _GL_ARG_NONNULL ((1)));
 978 _GL_CXXALIAS_RPL (lchown, int, (char const *file, uid_t owner, gid_t group));
 979 # else
 980 #  if !@HAVE_LCHOWN@
 981 _GL_FUNCDECL_SYS (lchown, int, (char const *file, uid_t owner, gid_t group)
 982                                _GL_ARG_NONNULL ((1)));
 983 #  endif
 984 _GL_CXXALIAS_SYS (lchown, int, (char const *file, uid_t owner, gid_t group));
 985 # endif
 986 _GL_CXXALIASWARN (lchown);
 987 #elif defined GNULIB_POSIXCHECK
 988 # undef lchown
 989 # if HAVE_RAW_DECL_LCHOWN
 990 _GL_WARN_ON_USE (lchown, "lchown is unportable to pre-POSIX.1-2001 systems - "
 991                  "use gnulib module lchown for portability");
 992 # endif
 993 #endif
 994
 995
 996 #if @GNULIB_LINK@
 997 /* Create a new hard link for an existing file.
 998    Return 0 if successful, otherwise -1 and errno set.
 999    See POSIX:2008 specification
1000    <http://pubs.opengroup.org/onlinepubs/9699919799/functions/link.html>.  */
1001 # if @REPLACE_LINK@
1002 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1003 #   define link rpl_link
1004 #  endif
1005 _GL_FUNCDECL_RPL (link, int, (const char *path1, const char *path2)
1006                              _GL_ARG_NONNULL ((1, 2)));
1007 _GL_CXXALIAS_RPL (link, int, (const char *path1, const char *path2));
1008 # else
1009 #  if !@HAVE_LINK@
1010 _GL_FUNCDECL_SYS (link, int, (const char *path1, const char *path2)
1011                              _GL_ARG_NONNULL ((1, 2)));
1012 #  endif
1013 _GL_CXXALIAS_SYS (link, int, (const char *path1, const char *path2));
1014 # endif
1015 _GL_CXXALIASWARN (link);
1016 #elif defined GNULIB_POSIXCHECK
1017 # undef link
1018 # if HAVE_RAW_DECL_LINK
1019 _GL_WARN_ON_USE (link, "link is unportable - "
1020                  "use gnulib module link for portability");
1021 # endif
1022 #endif
1023
1024
1025 #if @GNULIB_LINKAT@
1026 /* Create a new hard link for an existing file, relative to two
1027    directories.  FLAG controls whether symlinks are followed.
1028    Return 0 if successful, otherwise -1 and errno set.  */
1029 # if @REPLACE_LINKAT@
1030 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1031 #   undef linkat
1032 #   define linkat rpl_linkat
1033 #  endif
1034 _GL_FUNCDECL_RPL (linkat, int,
1035                   (int fd1, const char *path1, int fd2, const char *path2,
1036                    int flag)
1037                   _GL_ARG_NONNULL ((2, 4)));
1038 _GL_CXXALIAS_RPL (linkat, int,
1039                   (int fd1, const char *path1, int fd2, const char *path2,
1040                    int flag));
1041 # else
1042 #  if !@HAVE_LINKAT@
1043 _GL_FUNCDECL_SYS (linkat, int,
1044                   (int fd1, const char *path1, int fd2, const char *path2,
1045                    int flag)
1046                   _GL_ARG_NONNULL ((2, 4)));
1047 #  endif
1048 _GL_CXXALIAS_SYS (linkat, int,
1049                   (int fd1, const char *path1, int fd2, const char *path2,
1050                    int flag));
1051 # endif
1052 _GL_CXXALIASWARN (linkat);
1053 #elif defined GNULIB_POSIXCHECK
1054 # undef linkat
1055 # if HAVE_RAW_DECL_LINKAT
1056 _GL_WARN_ON_USE (linkat, "linkat is unportable - "
1057                  "use gnulib module linkat for portability");
1058 # endif
1059 #endif
1060
1061
1062 #if @GNULIB_LSEEK@
1063 /* Set the offset of FD relative to SEEK_SET, SEEK_CUR, or SEEK_END.
1064    Return the new offset if successful, otherwise -1 and errno set.
1065    See the POSIX:2008 specification
1066    <http://pubs.opengroup.org/onlinepubs/9699919799/functions/lseek.html>.  */
1067 # if @REPLACE_LSEEK@
1068 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1069 #   define lseek rpl_lseek
1070 #  endif
1071 _GL_FUNCDECL_RPL (lseek, off_t, (int fd, off_t offset, int whence));
1072 _GL_CXXALIAS_RPL (lseek, off_t, (int fd, off_t offset, int whence));
1073 # else
1074 _GL_CXXALIAS_SYS (lseek, off_t, (int fd, off_t offset, int whence));
1075 # endif
1076 _GL_CXXALIASWARN (lseek);
1077 #elif defined GNULIB_POSIXCHECK
1078 # undef lseek
1079 # if HAVE_RAW_DECL_LSEEK
1080 _GL_WARN_ON_USE (lseek, "lseek does not fail with ESPIPE on pipes on some "
1081                  "systems - use gnulib module lseek for portability");
1082 # endif
1083 #endif
1084
1085
1086 #if @GNULIB_PIPE@
1087 /* Create a pipe, defaulting to O_BINARY mode.
1088    Store the read-end as fd[0] and the write-end as fd[1].
1089    Return 0 upon success, or -1 with errno set upon failure.  */
1090 # if !@HAVE_PIPE@
1091 _GL_FUNCDECL_SYS (pipe, int, (int fd[2]) _GL_ARG_NONNULL ((1)));
1092 # endif
1093 _GL_CXXALIAS_SYS (pipe, int, (int fd[2]));
1094 _GL_CXXALIASWARN (pipe);
1095 #elif defined GNULIB_POSIXCHECK
1096 # undef pipe
1097 # if HAVE_RAW_DECL_PIPE
1098 _GL_WARN_ON_USE (pipe, "pipe is unportable - "
1099                  "use gnulib module pipe-posix for portability");
1100 # endif
1101 #endif
1102
1103
1104 #if @GNULIB_PIPE2@
1105 /* Create a pipe, applying the given flags when opening the read-end of the
1106    pipe and the write-end of the pipe.
1107    The flags are a bitmask, possibly including O_CLOEXEC (defined in <fcntl.h>)
1108    and O_TEXT, O_BINARY (defined in "binary-io.h").
1109    Store the read-end as fd[0] and the write-end as fd[1].
1110    Return 0 upon success, or -1 with errno set upon failure.
1111    See also the Linux man page at
1112    <http://www.kernel.org/doc/man-pages/online/pages/man2/pipe2.2.html>.  */
1113 # if @HAVE_PIPE2@
1114 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1115 #   define pipe2 rpl_pipe2
1116 #  endif
1117 _GL_FUNCDECL_RPL (pipe2, int, (int fd[2], int flags) _GL_ARG_NONNULL ((1)));
1118 _GL_CXXALIAS_RPL (pipe2, int, (int fd[2], int flags));
1119 # else
1120 _GL_FUNCDECL_SYS (pipe2, int, (int fd[2], int flags) _GL_ARG_NONNULL ((1)));
1121 _GL_CXXALIAS_SYS (pipe2, int, (int fd[2], int flags));
1122 # endif
1123 _GL_CXXALIASWARN (pipe2);
1124 #elif defined GNULIB_POSIXCHECK
1125 # undef pipe2
1126 # if HAVE_RAW_DECL_PIPE2
1127 _GL_WARN_ON_USE (pipe2, "pipe2 is unportable - "
1128                  "use gnulib module pipe2 for portability");
1129 # endif
1130 #endif
1131
1132
1133 #if @GNULIB_PREAD@
1134 /* Read at most BUFSIZE bytes from FD into BUF, starting at OFFSET.
1135    Return the number of bytes placed into BUF if successful, otherwise
1136    set errno and return -1.  0 indicates EOF.
1137    See the POSIX:2008 specification
1138    <http://pubs.opengroup.org/onlinepubs/9699919799/functions/pread.html>.  */
1139 # if @REPLACE_PREAD@
1140 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1141 #   undef pread
1142 #   define pread rpl_pread
1143 #  endif
1144 _GL_FUNCDECL_RPL (pread, ssize_t,
1145                   (int fd, void *buf, size_t bufsize, off_t offset)
1146                   _GL_ARG_NONNULL ((2)));
1147 _GL_CXXALIAS_RPL (pread, ssize_t,
1148                   (int fd, void *buf, size_t bufsize, off_t offset));
1149 # else
1150 #  if !@HAVE_PREAD@
1151 _GL_FUNCDECL_SYS (pread, ssize_t,
1152                   (int fd, void *buf, size_t bufsize, off_t offset)
1153                   _GL_ARG_NONNULL ((2)));
1154 #  endif
1155 _GL_CXXALIAS_SYS (pread, ssize_t,
1156                   (int fd, void *buf, size_t bufsize, off_t offset));
1157 # endif
1158 _GL_CXXALIASWARN (pread);
1159 #elif defined GNULIB_POSIXCHECK
1160 # undef pread
1161 # if HAVE_RAW_DECL_PREAD
1162 _GL_WARN_ON_USE (pread, "pread is unportable - "
1163                  "use gnulib module pread for portability");
1164 # endif
1165 #endif
1166
1167
1168 #if @GNULIB_PWRITE@
1169 /* Write at most BUFSIZE bytes from BUF into FD, starting at OFFSET.
1170    Return the number of bytes written if successful, otherwise
1171    set errno and return -1.  0 indicates nothing written.  See the
1172    POSIX:2008 specification
1173    <http://pubs.opengroup.org/onlinepubs/9699919799/functions/pwrite.html>.  */
1174 # if @REPLACE_PWRITE@
1175 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1176 #   undef pwrite
1177 #   define pwrite rpl_pwrite
1178 #  endif
1179 _GL_FUNCDECL_RPL (pwrite, ssize_t,
1180                   (int fd, const void *buf, size_t bufsize, off_t offset)
1181                   _GL_ARG_NONNULL ((2)));
1182 _GL_CXXALIAS_RPL (pwrite, ssize_t,
1183                   (int fd, const void *buf, size_t bufsize, off_t offset));
1184 # else
1185 #  if !@HAVE_PWRITE@
1186 _GL_FUNCDECL_SYS (pwrite, ssize_t,
1187                   (int fd, const void *buf, size_t bufsize, off_t offset)
1188                   _GL_ARG_NONNULL ((2)));
1189 #  endif
1190 _GL_CXXALIAS_SYS (pwrite, ssize_t,
1191                   (int fd, const void *buf, size_t bufsize, off_t offset));
1192 # endif
1193 _GL_CXXALIASWARN (pwrite);
1194 #elif defined GNULIB_POSIXCHECK
1195 # undef pwrite
1196 # if HAVE_RAW_DECL_PWRITE
1197 _GL_WARN_ON_USE (pwrite, "pwrite is unportable - "
1198                  "use gnulib module pwrite for portability");
1199 # endif
1200 #endif
1201
1202
1203 #if @GNULIB_READ@
1204 /* Read up to COUNT bytes from file descriptor FD into the buffer starting
1205    at BUF.  See the POSIX:2008 specification
1206    <http://pubs.opengroup.org/onlinepubs/9699919799/functions/read.html>.  */
1207 # if @REPLACE_READ@
1208 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1209 #   undef read
1210 #   define read rpl_read
1211 #  endif
1212 _GL_FUNCDECL_RPL (read, ssize_t, (int fd, void *buf, size_t count)
1213                                  _GL_ARG_NONNULL ((2)));
1214 _GL_CXXALIAS_RPL (read, ssize_t, (int fd, void *buf, size_t count));
1215 # else
1216 /* Need to cast, because on mingw, the third parameter is
1217                                                           unsigned int count
1218    and the return type is 'int'.  */
1219 _GL_CXXALIAS_SYS_CAST (read, ssize_t, (int fd, void *buf, size_t count));
1220 # endif
1221 _GL_CXXALIASWARN (read);
1222 #endif
1223
1224
1225 #if @GNULIB_READLINK@
1226 /* Read the contents of the symbolic link FILE and place the first BUFSIZE
1227    bytes of it into BUF.  Return the number of bytes placed into BUF if
1228    successful, otherwise -1 and errno set.
1229    See the POSIX:2008 specification
1230    <http://pubs.opengroup.org/onlinepubs/9699919799/functions/readlink.html>.  */
1231 # if @REPLACE_READLINK@
1232 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1233 #   define readlink rpl_readlink
1234 #  endif
1235 _GL_FUNCDECL_RPL (readlink, ssize_t,
1236                   (const char *file, char *buf, size_t bufsize)
1237                   _GL_ARG_NONNULL ((1, 2)));
1238 _GL_CXXALIAS_RPL (readlink, ssize_t,
1239                   (const char *file, char *buf, size_t bufsize));
1240 # else
1241 #  if !@HAVE_READLINK@
1242 _GL_FUNCDECL_SYS (readlink, ssize_t,
1243                   (const char *file, char *buf, size_t bufsize)
1244                   _GL_ARG_NONNULL ((1, 2)));
1245 #  endif
1246 _GL_CXXALIAS_SYS (readlink, ssize_t,
1247                   (const char *file, char *buf, size_t bufsize));
1248 # endif
1249 _GL_CXXALIASWARN (readlink);
1250 #elif defined GNULIB_POSIXCHECK
1251 # undef readlink
1252 # if HAVE_RAW_DECL_READLINK
1253 _GL_WARN_ON_USE (readlink, "readlink is unportable - "
1254                  "use gnulib module readlink for portability");
1255 # endif
1256 #endif
1257
1258
1259 #if @GNULIB_READLINKAT@
1260 # if !@HAVE_READLINKAT@
1261 _GL_FUNCDECL_SYS (readlinkat, ssize_t,
1262                   (int fd, char const *file, char *buf, size_t len)
1263                   _GL_ARG_NONNULL ((2, 3)));
1264 # endif
1265 _GL_CXXALIAS_SYS (readlinkat, ssize_t,
1266                   (int fd, char const *file, char *buf, size_t len));
1267 _GL_CXXALIASWARN (readlinkat);
1268 #elif defined GNULIB_POSIXCHECK
1269 # undef readlinkat
1270 # if HAVE_RAW_DECL_READLINKAT
1271 _GL_WARN_ON_USE (readlinkat, "readlinkat is not portable - "
1272                  "use gnulib module readlinkat for portability");
1273 # endif
1274 #endif
1275
1276
1277 #if @GNULIB_RMDIR@
1278 /* Remove the directory DIR.  */
1279 # if @REPLACE_RMDIR@
1280 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1281 #   define rmdir rpl_rmdir
1282 #  endif
1283 _GL_FUNCDECL_RPL (rmdir, int, (char const *name) _GL_ARG_NONNULL ((1)));
1284 _GL_CXXALIAS_RPL (rmdir, int, (char const *name));
1285 # else
1286 _GL_CXXALIAS_SYS (rmdir, int, (char const *name));
1287 # endif
1288 _GL_CXXALIASWARN (rmdir);
1289 #elif defined GNULIB_POSIXCHECK
1290 # undef rmdir
1291 # if HAVE_RAW_DECL_RMDIR
1292 _GL_WARN_ON_USE (rmdir, "rmdir is unportable - "
1293                  "use gnulib module rmdir for portability");
1294 # endif
1295 #endif
1296
1297
1298 #if @GNULIB_SETHOSTNAME@
1299 /* Set the host name of the machine.
1300    The host name may or may not be fully qualified.
1301
1302    Put LEN bytes of NAME into the host name.
1303    Return 0 if successful, otherwise, set errno and return -1.
1304
1305    Platforms with no ability to set the hostname return -1 and set
1306    errno = ENOSYS.  */
1307 # if !@HAVE_SETHOSTNAME@ || !@HAVE_DECL_SETHOSTNAME@
1308 _GL_FUNCDECL_SYS (sethostname, int, (const char *name, size_t len)
1309                                     _GL_ARG_NONNULL ((1)));
1310 # endif
1311 /* Need to cast, because on Solaris 11 2011-10, MacOS X 10.5, IRIX 6.5
1312    and FreeBSD 6.4 the second parameter is int.  On Solaris 11
1313    2011-10, the first parameter is not const.  */
1314 _GL_CXXALIAS_SYS_CAST (sethostname, int, (const char *name, size_t len));
1315 _GL_CXXALIASWARN (sethostname);
1316 #elif defined GNULIB_POSIXCHECK
1317 # undef sethostname
1318 # if HAVE_RAW_DECL_SETHOSTNAME
1319 _GL_WARN_ON_USE (sethostname, "sethostname is unportable - "
1320                  "use gnulib module sethostname for portability");
1321 # endif
1322 #endif
1323
1324
1325 #if @GNULIB_SLEEP@
1326 /* Pause the execution of the current thread for N seconds.
1327    Returns the number of seconds left to sleep.
1328    See the POSIX:2008 specification
1329    <http://pubs.opengroup.org/onlinepubs/9699919799/functions/sleep.html>.  */
1330 # if @REPLACE_SLEEP@
1331 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1332 #   undef sleep
1333 #   define sleep rpl_sleep
1334 #  endif
1335 _GL_FUNCDECL_RPL (sleep, unsigned int, (unsigned int n));
1336 _GL_CXXALIAS_RPL (sleep, unsigned int, (unsigned int n));
1337 # else
1338 #  if !@HAVE_SLEEP@
1339 _GL_FUNCDECL_SYS (sleep, unsigned int, (unsigned int n));
1340 #  endif
1341 _GL_CXXALIAS_SYS (sleep, unsigned int, (unsigned int n));
1342 # endif
1343 _GL_CXXALIASWARN (sleep);
1344 #elif defined GNULIB_POSIXCHECK
1345 # undef sleep
1346 # if HAVE_RAW_DECL_SLEEP
1347 _GL_WARN_ON_USE (sleep, "sleep is unportable - "
1348                  "use gnulib module sleep for portability");
1349 # endif
1350 #endif
1351
1352
1353 #if @GNULIB_SYMLINK@
1354 # if @REPLACE_SYMLINK@
1355 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1356 #   undef symlink
1357 #   define symlink rpl_symlink
1358 #  endif
1359 _GL_FUNCDECL_RPL (symlink, int, (char const *contents, char const *file)
1360                                 _GL_ARG_NONNULL ((1, 2)));
1361 _GL_CXXALIAS_RPL (symlink, int, (char const *contents, char const *file));
1362 # else
1363 #  if !@HAVE_SYMLINK@
1364 _GL_FUNCDECL_SYS (symlink, int, (char const *contents, char const *file)
1365                                 _GL_ARG_NONNULL ((1, 2)));
1366 #  endif
1367 _GL_CXXALIAS_SYS (symlink, int, (char const *contents, char const *file));
1368 # endif
1369 _GL_CXXALIASWARN (symlink);
1370 #elif defined GNULIB_POSIXCHECK
1371 # undef symlink
1372 # if HAVE_RAW_DECL_SYMLINK
1373 _GL_WARN_ON_USE (symlink, "symlink is not portable - "
1374                  "use gnulib module symlink for portability");
1375 # endif
1376 #endif
1377
1378
1379 #if @GNULIB_SYMLINKAT@
1380 # if !@HAVE_SYMLINKAT@
1381 _GL_FUNCDECL_SYS (symlinkat, int,
1382                   (char const *contents, int fd, char const *file)
1383                   _GL_ARG_NONNULL ((1, 3)));
1384 # endif
1385 _GL_CXXALIAS_SYS (symlinkat, int,
1386                   (char const *contents, int fd, char const *file));
1387 _GL_CXXALIASWARN (symlinkat);
1388 #elif defined GNULIB_POSIXCHECK
1389 # undef symlinkat
1390 # if HAVE_RAW_DECL_SYMLINKAT
1391 _GL_WARN_ON_USE (symlinkat, "symlinkat is not portable - "
1392                  "use gnulib module symlinkat for portability");
1393 # endif
1394 #endif
1395
1396
1397 #if @GNULIB_TTYNAME_R@
1398 /* Store at most BUFLEN characters of the pathname of the terminal FD is
1399    open on in BUF.  Return 0 on success, otherwise an error number.  */
1400 # if @REPLACE_TTYNAME_R@
1401 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1402 #   undef ttyname_r
1403 #   define ttyname_r rpl_ttyname_r
1404 #  endif
1405 _GL_FUNCDECL_RPL (ttyname_r, int,
1406                   (int fd, char *buf, size_t buflen) _GL_ARG_NONNULL ((2)));
1407 _GL_CXXALIAS_RPL (ttyname_r, int,
1408                   (int fd, char *buf, size_t buflen));
1409 # else
1410 #  if !@HAVE_DECL_TTYNAME_R@
1411 _GL_FUNCDECL_SYS (ttyname_r, int,
1412                   (int fd, char *buf, size_t buflen) _GL_ARG_NONNULL ((2)));
1413 #  endif
1414 _GL_CXXALIAS_SYS (ttyname_r, int,
1415                   (int fd, char *buf, size_t buflen));
1416 # endif
1417 _GL_CXXALIASWARN (ttyname_r);
1418 #elif defined GNULIB_POSIXCHECK
1419 # undef ttyname_r
1420 # if HAVE_RAW_DECL_TTYNAME_R
1421 _GL_WARN_ON_USE (ttyname_r, "ttyname_r is not portable - "
1422                  "use gnulib module ttyname_r for portability");
1423 # endif
1424 #endif
1425
1426
1427 #if @GNULIB_UNLINK@
1428 # if @REPLACE_UNLINK@
1429 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1430 #   undef unlink
1431 #   define unlink rpl_unlink
1432 #  endif
1433 _GL_FUNCDECL_RPL (unlink, int, (char const *file) _GL_ARG_NONNULL ((1)));
1434 _GL_CXXALIAS_RPL (unlink, int, (char const *file));
1435 # else
1436 _GL_CXXALIAS_SYS (unlink, int, (char const *file));
1437 # endif
1438 _GL_CXXALIASWARN (unlink);
1439 #elif defined GNULIB_POSIXCHECK
1440 # undef unlink
1441 # if HAVE_RAW_DECL_UNLINK
1442 _GL_WARN_ON_USE (unlink, "unlink is not portable - "
1443                  "use gnulib module unlink for portability");
1444 # endif
1445 #endif
1446
1447
1448 #if @GNULIB_UNLINKAT@
1449 # if @REPLACE_UNLINKAT@
1450 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1451 #   undef unlinkat
1452 #   define unlinkat rpl_unlinkat
1453 #  endif
1454 _GL_FUNCDECL_RPL (unlinkat, int, (int fd, char const *file, int flag)
1455                                  _GL_ARG_NONNULL ((2)));
1456 _GL_CXXALIAS_RPL (unlinkat, int, (int fd, char const *file, int flag));
1457 # else
1458 #  if !@HAVE_UNLINKAT@
1459 _GL_FUNCDECL_SYS (unlinkat, int, (int fd, char const *file, int flag)
1460                                  _GL_ARG_NONNULL ((2)));
1461 #  endif
1462 _GL_CXXALIAS_SYS (unlinkat, int, (int fd, char const *file, int flag));
1463 # endif
1464 _GL_CXXALIASWARN (unlinkat);
1465 #elif defined GNULIB_POSIXCHECK
1466 # undef unlinkat
1467 # if HAVE_RAW_DECL_UNLINKAT
1468 _GL_WARN_ON_USE (unlinkat, "unlinkat is not portable - "
1469                  "use gnulib module openat for portability");
1470 # endif
1471 #endif
1472
1473
1474 #if @GNULIB_USLEEP@
1475 /* Pause the execution of the current thread for N microseconds.
1476    Returns 0 on completion, or -1 on range error.
1477    See the POSIX:2001 specification
1478    <http://www.opengroup.org/susv3xsh/usleep.html>.  */
1479 # if @REPLACE_USLEEP@
1480 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1481 #   undef usleep
1482 #   define usleep rpl_usleep
1483 #  endif
1484 _GL_FUNCDECL_RPL (usleep, int, (useconds_t n));
1485 _GL_CXXALIAS_RPL (usleep, int, (useconds_t n));
1486 # else
1487 #  if !@HAVE_USLEEP@
1488 _GL_FUNCDECL_SYS (usleep, int, (useconds_t n));
1489 #  endif
1490 _GL_CXXALIAS_SYS (usleep, int, (useconds_t n));
1491 # endif
1492 _GL_CXXALIASWARN (usleep);
1493 #elif defined GNULIB_POSIXCHECK
1494 # undef usleep
1495 # if HAVE_RAW_DECL_USLEEP
1496 _GL_WARN_ON_USE (usleep, "usleep is unportable - "
1497                  "use gnulib module usleep for portability");
1498 # endif
1499 #endif
1500
1501
1502 #if @GNULIB_WRITE@
1503 /* Write up to COUNT bytes starting at BUF to file descriptor FD.
1504    See the POSIX:2008 specification
1505    <http://pubs.opengroup.org/onlinepubs/9699919799/functions/write.html>.  */
1506 # if @REPLACE_WRITE@
1507 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1508 #   undef write
1509 #   define write rpl_write
1510 #  endif
1511 _GL_FUNCDECL_RPL (write, ssize_t, (int fd, const void *buf, size_t count)
1512                                   _GL_ARG_NONNULL ((2)));
1513 _GL_CXXALIAS_RPL (write, ssize_t, (int fd, const void *buf, size_t count));
1514 # else
1515 /* Need to cast, because on mingw, the third parameter is
1516                                                              unsigned int count
1517    and the return type is 'int'.  */
1518 _GL_CXXALIAS_SYS_CAST (write, ssize_t, (int fd, const void *buf, size_t count));
1519 # endif
1520 _GL_CXXALIASWARN (write);
1521 #endif
1522
1523
1524 #endif /* _@GUARD_PREFIX@_UNISTD_H */
1525 #endif /* _@GUARD_PREFIX@_UNISTD_H */