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