1 /* Substitute for and wrapper around <unistd.h>.
2 Copyright (C) 2003-2010 Free Software Foundation, Inc.
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 2, or (at your option)
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.
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software Foundation,
16 Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
19 @PRAGMA_SYSTEM_HEADER@
23 /* Special invocation convention:
24 - On mingw, several headers, including <winsock2.h>, include <unistd.h>,
25 but we need to ensure that both the system <unistd.h> and <winsock2.h>
26 are completely included before we replace gethostname. */
27 #if @GNULIB_GETHOSTNAME@ && @UNISTD_H_HAVE_WINSOCK2_H@ \
28 && !defined _GL_WINSOCK2_H_WITNESS && defined _WINSOCK2_H
29 /* <unistd.h> is being indirectly included for the first time from
30 <winsock2.h>; avoid declaring any overrides. */
32 # @INCLUDE_NEXT@ @NEXT_UNISTD_H@
34 # error unexpected; report this to bug-gnulib@gnu.org
36 # define _GL_WINSOCK2_H_WITNESS
38 /* Normal invocation. */
39 #elif !defined _GL_UNISTD_H
41 /* The include_next requires a split double-inclusion guard. */
43 # @INCLUDE_NEXT@ @NEXT_UNISTD_H@
46 /* Get all possible declarations of gethostname(). */
47 #if @GNULIB_GETHOSTNAME@ && @UNISTD_H_HAVE_WINSOCK2_H@ \
48 && !defined _GL_INCLUDING_WINSOCK2_H
49 # define _GL_INCLUDING_WINSOCK2_H
50 # include <winsock2.h>
51 # undef _GL_INCLUDING_WINSOCK2_H
54 #if !defined _GL_UNISTD_H && !defined _GL_INCLUDING_WINSOCK2_H
57 /* NetBSD 5.0 mis-defines NULL. Also get size_t. */
60 /* mingw doesn't define the SEEK_* or *_FILENO macros in <unistd.h>. */
61 /* Cygwin 1.7.1 declares symlinkat in <stdio.h>, not in <unistd.h>. */
62 /* But avoid namespace pollution on glibc systems. */
63 #if (!(defined SEEK_CUR && defined SEEK_END && defined SEEK_SET) \
64 || ((@GNULIB_SYMLINKAT@ || defined GNULIB_POSIXCHECK) \
65 && defined __CYGWIN__)) \
66 && ! defined __GLIBC__
70 /* Cygwin 1.7.1 declares unlinkat in <fcntl.h>, not in <unistd.h>. */
71 /* But avoid namespace pollution on glibc systems. */
72 #if (@GNULIB_UNLINKAT@ || defined GNULIB_POSIXCHECK) && defined __CYGWIN__ \
73 && ! defined __GLIBC__
77 /* mingw fails to declare _exit in <unistd.h>. */
78 /* mingw, BeOS, Haiku declare environ in <stdlib.h>, not in <unistd.h>. */
79 /* Solaris declares getcwd not only in <unistd.h> but also in <stdlib.h>. */
80 /* But avoid namespace pollution on glibc systems. */
85 /* mingw declares getcwd in <io.h>, not in <unistd.h>. It also provides
86 _pipe in <io.h>, but that requires _O_BINARY from <fcntl.h>. */
87 #if ((@GNULIB_GETCWD@ || @GNULIB_PIPE@ || defined GNULIB_POSIXCHECK) \
88 && ((defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__))
95 /* AIX and OSF/1 5.1 declare getdomainname in <netdb.h>, not in <unistd.h>. */
96 /* But avoid namespace pollution on glibc systems. */
97 #if @GNULIB_GETDOMAINNAME@ && (defined _AIX || defined __osf__) \
102 #if (@GNULIB_WRITE@ || @GNULIB_READLINK@ || @GNULIB_READLINKAT@ \
103 || @GNULIB_PREAD@ || @GNULIB_PWRITE@ || defined GNULIB_POSIXCHECK)
105 # include <sys/types.h>
108 /* Get getopt(), optarg, optind, opterr, optopt.
109 But avoid namespace pollution on glibc systems. */
110 #if @GNULIB_UNISTD_H_GETOPT@ && !defined __GLIBC__ && !defined _GL_SYSTEM_GETOPT
114 /* The definitions of _GL_FUNCDECL_RPL etc. are copied here. */
116 /* The definition of _GL_ARG_NONNULL is copied here. */
118 /* The definition of _GL_WARN_ON_USE is copied here. */
121 #if @GNULIB_GETHOSTNAME@
122 /* Get all possible declarations of gethostname(). */
123 # if @UNISTD_H_HAVE_WINSOCK2_H@
124 # if !defined _GL_SYS_SOCKET_H
125 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
127 # define socket socket_used_without_including_sys_socket_h
129 # define connect connect_used_without_including_sys_socket_h
131 # define accept accept_used_without_including_sys_socket_h
133 # define bind bind_used_without_including_sys_socket_h
135 # define getpeername getpeername_used_without_including_sys_socket_h
137 # define getsockname getsockname_used_without_including_sys_socket_h
139 # define getsockopt getsockopt_used_without_including_sys_socket_h
141 # define listen listen_used_without_including_sys_socket_h
143 # define recv recv_used_without_including_sys_socket_h
145 # define send send_used_without_including_sys_socket_h
147 # define recvfrom recvfrom_used_without_including_sys_socket_h
149 # define sendto sendto_used_without_including_sys_socket_h
151 # define setsockopt setsockopt_used_without_including_sys_socket_h
153 # define shutdown shutdown_used_without_including_sys_socket_h
155 _GL_WARN_ON_USE (socket,
156 "socket() used without including <sys/socket.h>");
157 _GL_WARN_ON_USE (connect,
158 "connect() used without including <sys/socket.h>");
159 _GL_WARN_ON_USE (accept,
160 "accept() used without including <sys/socket.h>");
161 _GL_WARN_ON_USE (bind,
162 "bind() used without including <sys/socket.h>");
163 _GL_WARN_ON_USE (getpeername,
164 "getpeername() used without including <sys/socket.h>");
165 _GL_WARN_ON_USE (getsockname,
166 "getsockname() used without including <sys/socket.h>");
167 _GL_WARN_ON_USE (getsockopt,
168 "getsockopt() used without including <sys/socket.h>");
169 _GL_WARN_ON_USE (listen,
170 "listen() used without including <sys/socket.h>");
171 _GL_WARN_ON_USE (recv,
172 "recv() used without including <sys/socket.h>");
173 _GL_WARN_ON_USE (send,
174 "send() used without including <sys/socket.h>");
175 _GL_WARN_ON_USE (recvfrom,
176 "recvfrom() used without including <sys/socket.h>");
177 _GL_WARN_ON_USE (sendto,
178 "sendto() used without including <sys/socket.h>");
179 _GL_WARN_ON_USE (setsockopt,
180 "setsockopt() used without including <sys/socket.h>");
181 _GL_WARN_ON_USE (shutdown,
182 "shutdown() used without including <sys/socket.h>");
185 # if !defined _GL_SYS_SELECT_H
186 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
188 # define select select_used_without_including_sys_select_h
190 _GL_WARN_ON_USE (select,
191 "select() used without including <sys/select.h>");
198 /* OS/2 EMX lacks these macros. */
200 # define STDIN_FILENO 0
202 #ifndef STDOUT_FILENO
203 # define STDOUT_FILENO 1
205 #ifndef STDERR_FILENO
206 # define STDERR_FILENO 2
209 /* Ensure *_OK macros exist. */
218 /* Declare overridden functions. */
221 #if defined GNULIB_POSIXCHECK
222 /* The access() function is a security risk. */
223 _GL_WARN_ON_USE (access, "the access function is a security risk - "
224 "use the gnulib module faccessat instead");
229 /* Change the owner of FILE to UID (if UID is not -1) and the group of FILE
230 to GID (if GID is not -1). Follow symbolic links.
231 Return 0 if successful, otherwise -1 and errno set.
232 See the POSIX:2001 specification
233 <http://www.opengroup.org/susv3xsh/chown.html>. */
235 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
237 # define chown rpl_chown
239 _GL_FUNCDECL_RPL (chown, int, (const char *file, uid_t uid, gid_t gid)
240 _GL_ARG_NONNULL ((1)));
241 _GL_CXXALIAS_RPL (chown, int, (const char *file, uid_t uid, gid_t gid));
244 _GL_FUNCDECL_SYS (chown, int, (const char *file, uid_t uid, gid_t gid)
245 _GL_ARG_NONNULL ((1)));
247 _GL_CXXALIAS_SYS (chown, int, (const char *file, uid_t uid, gid_t gid));
249 _GL_CXXALIASWARN (chown);
250 #elif defined GNULIB_POSIXCHECK
252 # if HAVE_RAW_DECL_CHOWN
253 _GL_WARN_ON_USE (chown, "chown fails to follow symlinks on some systems and "
254 "doesn't treat a uid or gid of -1 on some systems - "
255 "use gnulib module chown for portability");
262 /* Automatically included by modules that need a replacement for close. */
263 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
265 # define close rpl_close
267 _GL_FUNCDECL_RPL (close, int, (int fd));
268 _GL_CXXALIAS_RPL (close, int, (int fd));
270 _GL_CXXALIAS_SYS (close, int, (int fd));
272 _GL_CXXALIASWARN (close);
273 #elif @UNISTD_H_HAVE_WINSOCK2_H_AND_USE_SOCKETS@
275 # define close close_used_without_requesting_gnulib_module_close
276 #elif defined GNULIB_POSIXCHECK
278 /* Assume close is always declared. */
279 _GL_WARN_ON_USE (close, "close does not portably work on sockets - "
280 "use gnulib module close for portability");
285 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
288 _GL_FUNCDECL_RPL (dup, int, (int oldfd));
289 _GL_CXXALIAS_RPL (dup, int, (int oldfd));
291 _GL_CXXALIAS_SYS (dup, int, (int oldfd));
293 _GL_CXXALIASWARN (dup);
297 /* Copy the file descriptor OLDFD into file descriptor NEWFD. Do nothing if
298 NEWFD = OLDFD, otherwise close NEWFD first if it is open.
299 Return newfd if successful, otherwise -1 and errno set.
300 See the POSIX:2001 specification
301 <http://www.opengroup.org/susv3xsh/dup2.html>. */
303 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
304 # define dup2 rpl_dup2
306 _GL_FUNCDECL_RPL (dup2, int, (int oldfd, int newfd));
307 _GL_CXXALIAS_RPL (dup2, int, (int oldfd, int newfd));
310 _GL_FUNCDECL_SYS (dup2, int, (int oldfd, int newfd));
312 _GL_CXXALIAS_SYS (dup2, int, (int oldfd, int newfd));
314 _GL_CXXALIASWARN (dup2);
315 #elif defined GNULIB_POSIXCHECK
317 # if HAVE_RAW_DECL_DUP2
318 _GL_WARN_ON_USE (dup2, "dup2 is unportable - "
319 "use gnulib module dup2 for portability");
325 /* Copy the file descriptor OLDFD into file descriptor NEWFD, with the
327 The flags are a bitmask, possibly including O_CLOEXEC (defined in <fcntl.h>)
328 and O_TEXT, O_BINARY (defined in "binary-io.h").
329 Close NEWFD first if it is open.
330 Return newfd if successful, otherwise -1 and errno set.
331 See the Linux man page at
332 <http://www.kernel.org/doc/man-pages/online/pages/man2/dup3.2.html>. */
334 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
335 # define dup3 rpl_dup3
337 _GL_FUNCDECL_RPL (dup3, int, (int oldfd, int newfd, int flags));
338 _GL_CXXALIAS_RPL (dup3, int, (int oldfd, int newfd, int flags));
340 _GL_FUNCDECL_SYS (dup3, int, (int oldfd, int newfd, int flags));
341 _GL_CXXALIAS_SYS (dup3, int, (int oldfd, int newfd, int flags));
343 _GL_CXXALIASWARN (dup3);
344 #elif defined GNULIB_POSIXCHECK
346 # if HAVE_RAW_DECL_DUP3
347 _GL_WARN_ON_USE (dup3, "dup3 is unportable - "
348 "use gnulib module dup3 for portability");
354 # if !@HAVE_DECL_ENVIRON@
355 /* Set of environment variables and values. An array of strings of the form
356 "VARIABLE=VALUE", terminated with a NULL. */
357 # if defined __APPLE__ && defined __MACH__
358 # include <crt_externs.h>
359 # define environ (*_NSGetEnviron ())
364 extern char **environ;
370 #elif defined GNULIB_POSIXCHECK
371 # if HAVE_RAW_DECL_ENVIRON
372 static inline char ***
377 _GL_WARN_ON_USE (rpl_environ, "environ is unportable - "
378 "use gnulib module environ for portability");
380 # define environ (*rpl_environ ())
385 #if @GNULIB_EUIDACCESS@
386 /* Like access(), except that it uses the effective user id and group id of
387 the current process. */
388 # if !@HAVE_EUIDACCESS@
389 _GL_FUNCDECL_SYS (euidaccess, int, (const char *filename, int mode)
390 _GL_ARG_NONNULL ((1)));
392 _GL_CXXALIAS_SYS (euidaccess, int, (const char *filename, int mode));
393 _GL_CXXALIASWARN (euidaccess);
394 # if defined GNULIB_POSIXCHECK
395 /* Like access(), this function is a security risk. */
396 _GL_WARN_ON_USE (euidaccess, "the euidaccess function is a security risk - "
397 "use the gnulib module faccessat instead");
399 #elif defined GNULIB_POSIXCHECK
401 # if HAVE_RAW_DECL_EUIDACCESS
402 _GL_WARN_ON_USE (euidaccess, "euidaccess is unportable - "
403 "use gnulib module euidaccess for portability");
408 #if @GNULIB_FACCESSAT@
409 # if !@HAVE_FACCESSAT@
410 _GL_FUNCDECL_SYS (faccessat, int,
411 (int fd, char const *file, int mode, int flag)
412 _GL_ARG_NONNULL ((2)));
414 _GL_CXXALIAS_SYS (faccessat, int,
415 (int fd, char const *file, int mode, int flag));
416 _GL_CXXALIASWARN (faccessat);
417 #elif defined GNULIB_POSIXCHECK
419 # if HAVE_RAW_DECL_FACCESSAT
420 _GL_WARN_ON_USE (faccessat, "faccessat is not portable - "
421 "use gnulib module faccessat for portability");
427 /* Change the process' current working directory to the directory on which
428 the given file descriptor is open.
429 Return 0 if successful, otherwise -1 and errno set.
430 See the POSIX:2001 specification
431 <http://www.opengroup.org/susv3xsh/fchdir.html>. */
433 _GL_FUNCDECL_SYS (fchdir, int, (int /*fd*/));
435 /* Gnulib internal hooks needed to maintain the fchdir metadata. */
436 _GL_EXTERN_C int _gl_register_fd (int fd, const char *filename)
437 _GL_ARG_NONNULL ((2));
438 _GL_EXTERN_C void _gl_unregister_fd (int fd);
439 _GL_EXTERN_C int _gl_register_dup (int oldfd, int newfd);
440 _GL_EXTERN_C const char *_gl_directory_name (int fd);
443 _GL_CXXALIAS_SYS (fchdir, int, (int /*fd*/));
444 _GL_CXXALIASWARN (fchdir);
445 #elif defined GNULIB_POSIXCHECK
447 # if HAVE_RAW_DECL_FCHDIR
448 _GL_WARN_ON_USE (fchdir, "fchdir is unportable - "
449 "use gnulib module fchdir for portability");
454 #if @GNULIB_FCHOWNAT@
455 # if @REPLACE_FCHOWNAT@
456 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
458 # define fchownat rpl_fchownat
460 _GL_FUNCDECL_RPL (fchownat, int, (int fd, char const *file,
461 uid_t owner, gid_t group, int flag)
462 _GL_ARG_NONNULL ((2)));
463 _GL_CXXALIAS_RPL (fchownat, int, (int fd, char const *file,
464 uid_t owner, gid_t group, int flag));
466 # if !@HAVE_FCHOWNAT@
467 _GL_FUNCDECL_SYS (fchownat, int, (int fd, char const *file,
468 uid_t owner, gid_t group, int flag)
469 _GL_ARG_NONNULL ((2)));
471 _GL_CXXALIAS_SYS (fchownat, int, (int fd, char const *file,
472 uid_t owner, gid_t group, int flag));
474 _GL_CXXALIASWARN (fchownat);
475 #elif defined GNULIB_POSIXCHECK
477 # if HAVE_RAW_DECL_FCHOWNAT
478 _GL_WARN_ON_USE (fchownat, "fchownat is not portable - "
479 "use gnulib module openat for portability");
485 /* Synchronize changes to a file.
486 Return 0 if successful, otherwise -1 and errno set.
487 See POSIX:2001 specification
488 <http://www.opengroup.org/susv3xsh/fsync.html>. */
490 _GL_FUNCDECL_SYS (fsync, int, (int fd));
492 _GL_CXXALIAS_SYS (fsync, int, (int fd));
493 _GL_CXXALIASWARN (fsync);
494 #elif defined GNULIB_POSIXCHECK
496 # if HAVE_RAW_DECL_FSYNC
497 _GL_WARN_ON_USE (fsync, "fsync is unportable - "
498 "use gnulib module fsync for portability");
503 #if @GNULIB_FTRUNCATE@
504 /* Change the size of the file to which FD is opened to become equal to LENGTH.
505 Return 0 if successful, otherwise -1 and errno set.
506 See the POSIX:2001 specification
507 <http://www.opengroup.org/susv3xsh/ftruncate.html>. */
508 # if !@HAVE_FTRUNCATE@
509 _GL_FUNCDECL_SYS (ftruncate, int, (int fd, off_t length));
511 _GL_CXXALIAS_SYS (ftruncate, int, (int fd, off_t length));
512 _GL_CXXALIASWARN (ftruncate);
513 #elif defined GNULIB_POSIXCHECK
515 # if HAVE_RAW_DECL_FTRUNCATE
516 _GL_WARN_ON_USE (ftruncate, "ftruncate is unportable - "
517 "use gnulib module ftruncate for portability");
523 /* Get the name of the current working directory, and put it in SIZE bytes
525 Return BUF if successful, or NULL if the directory couldn't be determined
526 or SIZE was too small.
527 See the POSIX:2001 specification
528 <http://www.opengroup.org/susv3xsh/getcwd.html>.
529 Additionally, the gnulib module 'getcwd' guarantees the following GNU
530 extension: If BUF is NULL, an array is allocated with 'malloc'; the array
531 is SIZE bytes long, unless SIZE == 0, in which case it is as big as
533 # if @REPLACE_GETCWD@
534 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
535 # define getcwd rpl_getcwd
537 _GL_FUNCDECL_RPL (getcwd, char *, (char *buf, size_t size));
538 _GL_CXXALIAS_RPL (getcwd, char *, (char *buf, size_t size));
540 /* Need to cast, because on mingw, the second parameter is
542 _GL_CXXALIAS_SYS_CAST (getcwd, char *, (char *buf, size_t size));
544 _GL_CXXALIASWARN (getcwd);
545 #elif defined GNULIB_POSIXCHECK
547 # if HAVE_RAW_DECL_GETCWD
548 _GL_WARN_ON_USE (getcwd, "getcwd is unportable - "
549 "use gnulib module getcwd for portability");
554 #if @GNULIB_GETDOMAINNAME@
555 /* Return the NIS domain name of the machine.
556 WARNING! The NIS domain name is unrelated to the fully qualified host name
557 of the machine. It is also unrelated to email addresses.
558 WARNING! The NIS domain name is usually the empty string or "(none)" when
561 Put up to LEN bytes of the NIS domain name into NAME.
562 Null terminate it if the name is shorter than LEN.
563 If the NIS domain name is longer than LEN, set errno = EINVAL and return -1.
564 Return 0 if successful, otherwise set errno and return -1. */
565 # if @REPLACE_GETDOMAINNAME@
566 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
567 # undef getdomainname
568 # define getdomainname rpl_getdomainname
570 _GL_FUNCDECL_RPL (getdomainname, int, (char *name, size_t len)
571 _GL_ARG_NONNULL ((1)));
572 _GL_CXXALIAS_RPL (getdomainname, int, (char *name, size_t len));
574 # if !@HAVE_DECL_GETDOMAINNAME@
575 _GL_FUNCDECL_SYS (getdomainname, int, (char *name, size_t len)
576 _GL_ARG_NONNULL ((1)));
578 _GL_CXXALIAS_SYS (getdomainname, int, (char *name, size_t len));
580 _GL_CXXALIASWARN (getdomainname);
581 #elif defined GNULIB_POSIXCHECK
582 # undef getdomainname
583 # if HAVE_RAW_DECL_GETDOMAINNAME
584 _GL_WARN_ON_USE (getdomainname, "getdomainname is unportable - "
585 "use gnulib module getdomainname for portability");
590 #if @GNULIB_GETDTABLESIZE@
591 /* Return the maximum number of file descriptors in the current process.
592 In POSIX, this is same as sysconf (_SC_OPEN_MAX). */
593 # if !@HAVE_GETDTABLESIZE@
594 _GL_FUNCDECL_SYS (getdtablesize, int, (void));
596 _GL_CXXALIAS_SYS (getdtablesize, int, (void));
597 _GL_CXXALIASWARN (getdtablesize);
598 #elif defined GNULIB_POSIXCHECK
599 # undef getdtablesize
600 # if HAVE_RAW_DECL_GETDTABLESIZE
601 _GL_WARN_ON_USE (getdtablesize, "getdtablesize is unportable - "
602 "use gnulib module getdtablesize for portability");
607 #if @GNULIB_GETGROUPS@
608 /* Return the supplemental groups that the current process belongs to.
609 It is unspecified whether the effective group id is in the list.
610 If N is 0, return the group count; otherwise, N describes how many
611 entries are available in GROUPS. Return -1 and set errno if N is
612 not 0 and not large enough. Fails with ENOSYS on some systems. */
613 # if @REPLACE_GETGROUPS@
614 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
616 # define getgroups rpl_getgroups
618 _GL_FUNCDECL_RPL (getgroups, int, (int n, gid_t *groups));
619 _GL_CXXALIAS_RPL (getgroups, int, (int n, gid_t *groups));
621 # if !@HAVE_GETGROUPS@
622 _GL_FUNCDECL_SYS (getgroups, int, (int n, gid_t *groups));
624 _GL_CXXALIAS_SYS (getgroups, int, (int n, gid_t *groups));
626 _GL_CXXALIASWARN (getgroups);
627 #elif defined GNULIB_POSIXCHECK
629 # if HAVE_RAW_DECL_GETGROUPS
630 _GL_WARN_ON_USE (getgroups, "getgroups is unportable - "
631 "use gnulib module getgroups for portability");
636 #if @GNULIB_GETHOSTNAME@
637 /* Return the standard host name of the machine.
638 WARNING! The host name may or may not be fully qualified.
640 Put up to LEN bytes of the host name into NAME.
641 Null terminate it if the name is shorter than LEN.
642 If the host name is longer than LEN, set errno = EINVAL and return -1.
643 Return 0 if successful, otherwise set errno and return -1. */
644 # if @UNISTD_H_HAVE_WINSOCK2_H@
645 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
647 # define gethostname rpl_gethostname
649 _GL_FUNCDECL_RPL (gethostname, int, (char *name, size_t len)
650 _GL_ARG_NONNULL ((1)));
651 _GL_CXXALIAS_RPL (gethostname, int, (char *name, size_t len));
653 # if !@HAVE_GETHOSTNAME@
654 _GL_FUNCDECL_SYS (gethostname, int, (char *name, size_t len)
655 _GL_ARG_NONNULL ((1)));
657 /* Need to cast, because on Solaris 10 systems, the second parameter is
659 _GL_CXXALIAS_SYS_CAST (gethostname, int, (char *name, size_t len));
661 _GL_CXXALIASWARN (gethostname);
662 #elif @UNISTD_H_HAVE_WINSOCK2_H@
664 # define gethostname gethostname_used_without_requesting_gnulib_module_gethostname
665 #elif defined GNULIB_POSIXCHECK
667 # if HAVE_RAW_DECL_GETHOSTNAME
668 _GL_WARN_ON_USE (gethostname, "gethostname is unportable - "
669 "use gnulib module gethostname for portability");
674 #if @GNULIB_GETLOGIN@
675 /* Returns the user's login name, or NULL if it cannot be found. Upon error,
676 returns NULL with errno set.
678 See <http://www.opengroup.org/susv3xsh/getlogin.html>.
680 Most programs don't need to use this function, because the information is
681 available through environment variables:
682 ${LOGNAME-$USER} on Unix platforms,
683 $USERNAME on native Windows platforms.
685 # if !@HAVE_GETLOGIN@
686 _GL_FUNCDECL_SYS (getlogin, char *, (void));
688 _GL_CXXALIAS_SYS (getlogin, char *, (void));
689 _GL_CXXALIASWARN (getlogin);
690 #elif defined GNULIB_POSIXCHECK
692 # if HAVE_RAW_DECL_GETLOGIN
693 _GL_WARN_ON_USE (getlogin, "getlogin is unportable - "
694 "use gnulib module getlogin for portability");
699 #if @GNULIB_GETLOGIN_R@
700 /* Copies the user's login name to NAME.
701 The array pointed to by NAME has room for SIZE bytes.
703 Returns 0 if successful. Upon error, an error number is returned, or -1 in
704 the case that the login name cannot be found but no specific error is
705 provided (this case is hopefully rare but is left open by the POSIX spec).
707 See <http://www.opengroup.org/susv3xsh/getlogin.html>.
709 Most programs don't need to use this function, because the information is
710 available through environment variables:
711 ${LOGNAME-$USER} on Unix platforms,
712 $USERNAME on native Windows platforms.
714 # if !@HAVE_DECL_GETLOGIN_R@
715 _GL_FUNCDECL_SYS (getlogin_r, int, (char *name, size_t size)
716 _GL_ARG_NONNULL ((1)));
718 /* Need to cast, because on Solaris 10 systems, the second argument is
720 _GL_CXXALIAS_SYS_CAST (getlogin_r, int, (char *name, size_t size));
721 _GL_CXXALIASWARN (getlogin_r);
722 #elif defined GNULIB_POSIXCHECK
724 # if HAVE_RAW_DECL_GETLOGIN_R
725 _GL_WARN_ON_USE (getlogin_r, "getlogin_r is unportable - "
726 "use gnulib module getlogin_r for portability");
731 #if @GNULIB_GETPAGESIZE@
732 # if @REPLACE_GETPAGESIZE@
733 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
734 # define getpagesize rpl_getpagesize
736 _GL_FUNCDECL_RPL (getpagesize, int, (void));
737 _GL_CXXALIAS_RPL (getpagesize, int, (void));
739 # if !@HAVE_GETPAGESIZE@
740 # if !defined getpagesize
741 /* This is for POSIX systems. */
742 # if !defined _gl_getpagesize && defined _SC_PAGESIZE
743 # if ! (defined __VMS && __VMS_VER < 70000000)
744 # define _gl_getpagesize() sysconf (_SC_PAGESIZE)
747 /* This is for older VMS. */
748 # if !defined _gl_getpagesize && defined __VMS
750 # define _gl_getpagesize() 8192
752 # define _gl_getpagesize() 512
755 /* This is for BeOS. */
756 # if !defined _gl_getpagesize && @HAVE_OS_H@
758 # if defined B_PAGE_SIZE
759 # define _gl_getpagesize() B_PAGE_SIZE
762 /* This is for AmigaOS4.0. */
763 # if !defined _gl_getpagesize && defined __amigaos4__
764 # define _gl_getpagesize() 2048
766 /* This is for older Unix systems. */
767 # if !defined _gl_getpagesize && @HAVE_SYS_PARAM_H@
768 # include <sys/param.h>
769 # ifdef EXEC_PAGESIZE
770 # define _gl_getpagesize() EXEC_PAGESIZE
776 # define _gl_getpagesize() (NBPG * CLSIZE)
779 # define _gl_getpagesize() NBPC
784 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
785 # define getpagesize() _gl_getpagesize ()
790 return _gl_getpagesize ();
795 /* Need to cast, because on Cygwin 1.5.x systems, the return type is size_t. */
796 _GL_CXXALIAS_SYS_CAST (getpagesize, int, (void));
798 # if @HAVE_DECL_GETPAGESIZE@
799 _GL_CXXALIASWARN (getpagesize);
801 #elif defined GNULIB_POSIXCHECK
803 # if HAVE_RAW_DECL_GETPAGESIZE
804 _GL_WARN_ON_USE (getpagesize, "getpagesize is unportable - "
805 "use gnulib module getpagesize for portability");
810 #if @GNULIB_GETUSERSHELL@
811 /* Return the next valid login shell on the system, or NULL when the end of
812 the list has been reached. */
813 # if !@HAVE_DECL_GETUSERSHELL@
814 _GL_FUNCDECL_SYS (getusershell, char *, (void));
816 _GL_CXXALIAS_SYS (getusershell, char *, (void));
817 _GL_CXXALIASWARN (getusershell);
818 #elif defined GNULIB_POSIXCHECK
820 # if HAVE_RAW_DECL_GETUSERSHELL
821 _GL_WARN_ON_USE (getusershell, "getusershell is unportable - "
822 "use gnulib module getusershell for portability");
826 #if @GNULIB_GETUSERSHELL@
827 /* Rewind to pointer that is advanced at each getusershell() call. */
828 # if !@HAVE_DECL_GETUSERSHELL@
829 _GL_FUNCDECL_SYS (setusershell, void, (void));
831 _GL_CXXALIAS_SYS (setusershell, void, (void));
832 _GL_CXXALIASWARN (setusershell);
833 #elif defined GNULIB_POSIXCHECK
835 # if HAVE_RAW_DECL_SETUSERSHELL
836 _GL_WARN_ON_USE (setusershell, "setusershell is unportable - "
837 "use gnulib module getusershell for portability");
841 #if @GNULIB_GETUSERSHELL@
842 /* Free the pointer that is advanced at each getusershell() call and
843 associated resources. */
844 # if !@HAVE_DECL_GETUSERSHELL@
845 _GL_FUNCDECL_SYS (endusershell, void, (void));
847 _GL_CXXALIAS_SYS (endusershell, void, (void));
848 _GL_CXXALIASWARN (endusershell);
849 #elif defined GNULIB_POSIXCHECK
851 # if HAVE_RAW_DECL_ENDUSERSHELL
852 _GL_WARN_ON_USE (endusershell, "endusershell is unportable - "
853 "use gnulib module getusershell for portability");
859 /* Change the owner of FILE to UID (if UID is not -1) and the group of FILE
860 to GID (if GID is not -1). Do not follow symbolic links.
861 Return 0 if successful, otherwise -1 and errno set.
862 See the POSIX:2001 specification
863 <http://www.opengroup.org/susv3xsh/lchown.html>. */
864 # if @REPLACE_LCHOWN@
865 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
867 # define lchown rpl_lchown
869 _GL_FUNCDECL_RPL (lchown, int, (char const *file, uid_t owner, gid_t group)
870 _GL_ARG_NONNULL ((1)));
871 _GL_CXXALIAS_RPL (lchown, int, (char const *file, uid_t owner, gid_t group));
874 _GL_FUNCDECL_SYS (lchown, int, (char const *file, uid_t owner, gid_t group)
875 _GL_ARG_NONNULL ((1)));
877 _GL_CXXALIAS_SYS (lchown, int, (char const *file, uid_t owner, gid_t group));
879 _GL_CXXALIASWARN (lchown);
880 #elif defined GNULIB_POSIXCHECK
882 # if HAVE_RAW_DECL_LCHOWN
883 _GL_WARN_ON_USE (lchown, "lchown is unportable to pre-POSIX.1-2001 systems - "
884 "use gnulib module lchown for portability");
890 /* Create a new hard link for an existing file.
891 Return 0 if successful, otherwise -1 and errno set.
892 See POSIX:2001 specification
893 <http://www.opengroup.org/susv3xsh/link.html>. */
895 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
896 # define link rpl_link
898 _GL_FUNCDECL_RPL (link, int, (const char *path1, const char *path2)
899 _GL_ARG_NONNULL ((1, 2)));
900 _GL_CXXALIAS_RPL (link, int, (const char *path1, const char *path2));
903 _GL_FUNCDECL_SYS (link, int, (const char *path1, const char *path2)
904 _GL_ARG_NONNULL ((1, 2)));
906 _GL_CXXALIAS_SYS (link, int, (const char *path1, const char *path2));
908 _GL_CXXALIASWARN (link);
909 #elif defined GNULIB_POSIXCHECK
911 # if HAVE_RAW_DECL_LINK
912 _GL_WARN_ON_USE (link, "link is unportable - "
913 "use gnulib module link for portability");
919 /* Create a new hard link for an existing file, relative to two
920 directories. FLAG controls whether symlinks are followed.
921 Return 0 if successful, otherwise -1 and errno set. */
922 # if @REPLACE_LINKAT@
923 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
925 # define linkat rpl_linkat
927 _GL_FUNCDECL_RPL (linkat, int,
928 (int fd1, const char *path1, int fd2, const char *path2,
930 _GL_ARG_NONNULL ((2, 4)));
931 _GL_CXXALIAS_RPL (linkat, int,
932 (int fd1, const char *path1, int fd2, const char *path2,
936 _GL_FUNCDECL_SYS (linkat, int,
937 (int fd1, const char *path1, int fd2, const char *path2,
939 _GL_ARG_NONNULL ((2, 4)));
941 _GL_CXXALIAS_SYS (linkat, int,
942 (int fd1, const char *path1, int fd2, const char *path2,
945 _GL_CXXALIASWARN (linkat);
946 #elif defined GNULIB_POSIXCHECK
948 # if HAVE_RAW_DECL_LINKAT
949 _GL_WARN_ON_USE (linkat, "linkat is unportable - "
950 "use gnulib module linkat for portability");
956 /* Set the offset of FD relative to SEEK_SET, SEEK_CUR, or SEEK_END.
957 Return the new offset if successful, otherwise -1 and errno set.
958 See the POSIX:2001 specification
959 <http://www.opengroup.org/susv3xsh/lseek.html>. */
961 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
962 # define lseek rpl_lseek
964 _GL_FUNCDECL_RPL (lseek, off_t, (int fd, off_t offset, int whence));
965 _GL_CXXALIAS_RPL (lseek, off_t, (int fd, off_t offset, int whence));
967 _GL_CXXALIAS_SYS (lseek, off_t, (int fd, off_t offset, int whence));
969 _GL_CXXALIASWARN (lseek);
970 #elif defined GNULIB_POSIXCHECK
972 # if HAVE_RAW_DECL_LSEEK
973 _GL_WARN_ON_USE (lseek, "lseek does not fail with ESPIPE on pipes on some "
974 "systems - use gnulib module lseek for portability");
980 /* Create a pipe, defaulting to O_BINARY mode.
981 Store the read-end as fd[0] and the write-end as fd[1].
982 Return 0 upon success, or -1 with errno set upon failure. */
983 # if (defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__
984 # define pipe(fd) _pipe (fd, 4096, _O_BINARY)
986 #elif defined GNULIB_POSIXCHECK
988 # if HAVE_RAW_DECL_PIPE
989 _GL_WARN_ON_USE (pipe, "pipe is unportable - "
990 "use gnulib module pipe for portability");
996 /* Create a pipe, applying the given flags when opening the read-end of the
997 pipe and the write-end of the pipe.
998 The flags are a bitmask, possibly including O_CLOEXEC (defined in <fcntl.h>)
999 and O_TEXT, O_BINARY (defined in "binary-io.h").
1000 Store the read-end as fd[0] and the write-end as fd[1].
1001 Return 0 upon success, or -1 with errno set upon failure.
1002 See also the Linux man page at
1003 <http://www.kernel.org/doc/man-pages/online/pages/man2/pipe2.2.html>. */
1005 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1006 # define pipe2 rpl_pipe2
1008 _GL_FUNCDECL_RPL (pipe2, int, (int fd[2], int flags) _GL_ARG_NONNULL ((1)));
1009 _GL_CXXALIAS_RPL (pipe2, int, (int fd[2], int flags));
1011 _GL_FUNCDECL_SYS (pipe2, int, (int fd[2], int flags) _GL_ARG_NONNULL ((1)));
1012 _GL_CXXALIAS_SYS (pipe2, int, (int fd[2], int flags));
1014 _GL_CXXALIASWARN (pipe2);
1015 #elif defined GNULIB_POSIXCHECK
1017 # if HAVE_RAW_DECL_PIPE2
1018 _GL_WARN_ON_USE (pipe2, "pipe2 is unportable - "
1019 "use gnulib module pipe2 for portability");
1025 /* Read at most BUFSIZE bytes from FD into BUF, starting at OFFSET.
1026 Return the number of bytes placed into BUF if successful, otherwise
1027 set errno and return -1. 0 indicates EOF. See the POSIX:2001
1028 specification <http://www.opengroup.org/susv3xsh/pread.html>. */
1029 # if @REPLACE_PREAD@
1030 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1031 # define pread rpl_pread
1033 _GL_FUNCDECL_RPL (pread, ssize_t,
1034 (int fd, void *buf, size_t bufsize, off_t offset)
1035 _GL_ARG_NONNULL ((2)));
1036 _GL_CXXALIAS_RPL (pread, ssize_t,
1037 (int fd, void *buf, size_t bufsize, off_t offset));
1040 _GL_FUNCDECL_SYS (pread, ssize_t,
1041 (int fd, void *buf, size_t bufsize, off_t offset)
1042 _GL_ARG_NONNULL ((2)));
1044 _GL_CXXALIAS_SYS (pread, ssize_t,
1045 (int fd, void *buf, size_t bufsize, off_t offset));
1047 _GL_CXXALIASWARN (pread);
1048 #elif defined GNULIB_POSIXCHECK
1050 # if HAVE_RAW_DECL_PREAD
1051 _GL_WARN_ON_USE (pread, "pread is unportable - "
1052 "use gnulib module pread for portability");
1058 /* Write at most BUFSIZE bytes from BUF into FD, starting at OFFSET.
1059 Return the number of bytes written if successful, otherwise
1060 set errno and return -1. 0 indicates nothing written. See the
1061 POSIX:2001 specification
1062 <http://www.opengroup.org/susv3xsh/pwrite.html>. */
1063 # if @REPLACE_PWRITE@
1064 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1065 # define pwrite rpl_pwrite
1067 _GL_FUNCDECL_RPL (pwrite, ssize_t,
1068 (int fd, const void *buf, size_t bufsize, off_t offset)
1069 _GL_ARG_NONNULL ((2)));
1070 _GL_CXXALIAS_RPL (pwrite, ssize_t,
1071 (int fd, const void *buf, size_t bufsize, off_t offset));
1074 _GL_FUNCDECL_SYS (pwrite, ssize_t,
1075 (int fd, const void *buf, size_t bufsize, off_t offset)
1076 _GL_ARG_NONNULL ((2)));
1078 _GL_CXXALIAS_SYS (pwrite, ssize_t,
1079 (int fd, const void *buf, size_t bufsize, off_t offset));
1081 _GL_CXXALIASWARN (pwrite);
1082 #elif defined GNULIB_POSIXCHECK
1084 # if HAVE_RAW_DECL_PWRITE
1085 _GL_WARN_ON_USE (pwrite, "pwrite is unportable - "
1086 "use gnulib module pwrite for portability");
1091 #if @GNULIB_READLINK@
1092 /* Read the contents of the symbolic link FILE and place the first BUFSIZE
1093 bytes of it into BUF. Return the number of bytes placed into BUF if
1094 successful, otherwise -1 and errno set.
1095 See the POSIX:2001 specification
1096 <http://www.opengroup.org/susv3xsh/readlink.html>. */
1097 # if @REPLACE_READLINK@
1098 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1099 # define readlink rpl_readlink
1101 _GL_FUNCDECL_RPL (readlink, ssize_t,
1102 (const char *file, char *buf, size_t bufsize)
1103 _GL_ARG_NONNULL ((1, 2)));
1104 _GL_CXXALIAS_RPL (readlink, ssize_t,
1105 (const char *file, char *buf, size_t bufsize));
1107 # if !@HAVE_READLINK@
1108 _GL_FUNCDECL_SYS (readlink, ssize_t,
1109 (const char *file, char *buf, size_t bufsize)
1110 _GL_ARG_NONNULL ((1, 2)));
1112 _GL_CXXALIAS_SYS (readlink, ssize_t,
1113 (const char *file, char *buf, size_t bufsize));
1115 _GL_CXXALIASWARN (readlink);
1116 #elif defined GNULIB_POSIXCHECK
1118 # if HAVE_RAW_DECL_READLINK
1119 _GL_WARN_ON_USE (readlink, "readlink is unportable - "
1120 "use gnulib module readlink for portability");
1125 #if @GNULIB_READLINKAT@
1126 # if !@HAVE_READLINKAT@
1127 _GL_FUNCDECL_SYS (readlinkat, ssize_t,
1128 (int fd, char const *file, char *buf, size_t len)
1129 _GL_ARG_NONNULL ((2, 3)));
1131 _GL_CXXALIAS_SYS (readlinkat, ssize_t,
1132 (int fd, char const *file, char *buf, size_t len));
1133 _GL_CXXALIASWARN (readlinkat);
1134 #elif defined GNULIB_POSIXCHECK
1136 # if HAVE_RAW_DECL_READLINKAT
1137 _GL_WARN_ON_USE (readlinkat, "readlinkat is not portable - "
1138 "use gnulib module readlinkat for portability");
1144 /* Remove the directory DIR. */
1145 # if @REPLACE_RMDIR@
1146 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1147 # define rmdir rpl_rmdir
1149 _GL_FUNCDECL_RPL (rmdir, int, (char const *name) _GL_ARG_NONNULL ((1)));
1150 _GL_CXXALIAS_RPL (rmdir, int, (char const *name));
1152 _GL_CXXALIAS_SYS (rmdir, int, (char const *name));
1154 _GL_CXXALIASWARN (rmdir);
1155 #elif defined GNULIB_POSIXCHECK
1157 # if HAVE_RAW_DECL_RMDIR
1158 _GL_WARN_ON_USE (rmdir, "rmdir is unportable - "
1159 "use gnulib module rmdir for portability");
1165 /* Pause the execution of the current thread for N seconds.
1166 Returns the number of seconds left to sleep.
1167 See the POSIX:2001 specification
1168 <http://www.opengroup.org/susv3xsh/sleep.html>. */
1169 # if @REPLACE_SLEEP@
1170 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1172 # define sleep rpl_sleep
1174 _GL_FUNCDECL_RPL (sleep, unsigned int, (unsigned int n));
1175 _GL_CXXALIAS_RPL (sleep, unsigned int, (unsigned int n));
1178 _GL_FUNCDECL_SYS (sleep, unsigned int, (unsigned int n));
1180 _GL_CXXALIAS_SYS (sleep, unsigned int, (unsigned int n));
1182 _GL_CXXALIASWARN (sleep);
1183 #elif defined GNULIB_POSIXCHECK
1185 # if HAVE_RAW_DECL_SLEEP
1186 _GL_WARN_ON_USE (sleep, "sleep is unportable - "
1187 "use gnulib module sleep for portability");
1192 #if @GNULIB_SYMLINK@
1193 # if @REPLACE_SYMLINK@
1194 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1196 # define symlink rpl_symlink
1198 _GL_FUNCDECL_RPL (symlink, int, (char const *contents, char const *file)
1199 _GL_ARG_NONNULL ((1, 2)));
1200 _GL_CXXALIAS_RPL (symlink, int, (char const *contents, char const *file));
1202 # if !@HAVE_SYMLINK@
1203 _GL_FUNCDECL_SYS (symlink, int, (char const *contents, char const *file)
1204 _GL_ARG_NONNULL ((1, 2)));
1206 _GL_CXXALIAS_SYS (symlink, int, (char const *contents, char const *file));
1208 _GL_CXXALIASWARN (symlink);
1209 #elif defined GNULIB_POSIXCHECK
1211 # if HAVE_RAW_DECL_SYMLINK
1212 _GL_WARN_ON_USE (symlink, "symlink is not portable - "
1213 "use gnulib module symlink for portability");
1218 #if @GNULIB_SYMLINKAT@
1219 # if !@HAVE_SYMLINKAT@
1220 _GL_FUNCDECL_SYS (symlinkat, int,
1221 (char const *contents, int fd, char const *file)
1222 _GL_ARG_NONNULL ((1, 3)));
1224 _GL_CXXALIAS_SYS (symlinkat, int,
1225 (char const *contents, int fd, char const *file));
1226 _GL_CXXALIASWARN (symlinkat);
1227 #elif defined GNULIB_POSIXCHECK
1229 # if HAVE_RAW_DECL_SYMLINKAT
1230 _GL_WARN_ON_USE (symlinkat, "symlinkat is not portable - "
1231 "use gnulib module symlinkat for portability");
1236 #if @GNULIB_TTYNAME_R@
1237 /* Store at most BUFLEN characters of the pathname of the terminal FD is
1238 open on in BUF. Return 0 on success, otherwise an error number. */
1239 # if @REPLACE_TTYNAME_R@
1240 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1242 # define ttyname_r rpl_ttyname_r
1244 _GL_FUNCDECL_RPL (ttyname_r, int,
1245 (int fd, char *buf, size_t buflen) _GL_ARG_NONNULL ((2)));
1246 _GL_CXXALIAS_RPL (ttyname_r, int,
1247 (int fd, char *buf, size_t buflen));
1249 # if !@HAVE_TTYNAME_R@
1250 _GL_FUNCDECL_SYS (ttyname_r, int,
1251 (int fd, char *buf, size_t buflen) _GL_ARG_NONNULL ((2)));
1253 _GL_CXXALIAS_SYS (ttyname_r, int,
1254 (int fd, char *buf, size_t buflen));
1256 _GL_CXXALIASWARN (ttyname_r);
1257 #elif defined GNULIB_POSIXCHECK
1259 # if HAVE_RAW_DECL_TTYNAME_R
1260 _GL_WARN_ON_USE (ttyname_r, "ttyname_r is not portable - "
1261 "use gnulib module ttyname_r for portability");
1267 # if @REPLACE_UNLINK@
1268 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1270 # define unlink rpl_unlink
1272 _GL_FUNCDECL_RPL (unlink, int, (char const *file) _GL_ARG_NONNULL ((1)));
1273 _GL_CXXALIAS_RPL (unlink, int, (char const *file));
1275 _GL_CXXALIAS_SYS (unlink, int, (char const *file));
1277 _GL_CXXALIASWARN (unlink);
1278 #elif defined GNULIB_POSIXCHECK
1280 # if HAVE_RAW_DECL_UNLINK
1281 _GL_WARN_ON_USE (unlink, "unlink is not portable - "
1282 "use gnulib module unlink for portability");
1287 #if @GNULIB_UNLINKAT@
1288 # if @REPLACE_UNLINKAT@
1289 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1291 # define unlinkat rpl_unlinkat
1293 _GL_FUNCDECL_RPL (unlinkat, int, (int fd, char const *file, int flag)
1294 _GL_ARG_NONNULL ((2)));
1295 _GL_CXXALIAS_RPL (unlinkat, int, (int fd, char const *file, int flag));
1297 # if !@HAVE_UNLINKAT@
1298 _GL_FUNCDECL_SYS (unlinkat, int, (int fd, char const *file, int flag)
1299 _GL_ARG_NONNULL ((2)));
1301 _GL_CXXALIAS_SYS (unlinkat, int, (int fd, char const *file, int flag));
1303 _GL_CXXALIASWARN (unlinkat);
1304 #elif defined GNULIB_POSIXCHECK
1306 # if HAVE_RAW_DECL_UNLINKAT
1307 _GL_WARN_ON_USE (unlinkat, "unlinkat is not portable - "
1308 "use gnulib module openat for portability");
1314 /* Pause the execution of the current thread for N microseconds.
1315 Returns 0 on completion, or -1 on range error.
1316 See the POSIX:2001 specification
1317 <http://www.opengroup.org/susv3xsh/sleep.html>. */
1318 # if @REPLACE_USLEEP@
1319 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1321 # define usleep rpl_usleep
1323 _GL_FUNCDECL_RPL (usleep, int, (useconds_t n));
1324 _GL_CXXALIAS_RPL (usleep, int, (useconds_t n));
1327 _GL_FUNCDECL_SYS (usleep, int, (useconds_t n));
1329 _GL_CXXALIAS_SYS (usleep, int, (useconds_t n));
1331 _GL_CXXALIASWARN (usleep);
1332 #elif defined GNULIB_POSIXCHECK
1334 # if HAVE_RAW_DECL_USLEEP
1335 _GL_WARN_ON_USE (usleep, "usleep is unportable - "
1336 "use gnulib module usleep for portability");
1342 /* Write up to COUNT bytes starting at BUF to file descriptor FD.
1343 See the POSIX:2001 specification
1344 <http://www.opengroup.org/susv3xsh/write.html>. */
1345 # if @REPLACE_WRITE@ && @GNULIB_UNISTD_H_SIGPIPE@
1346 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1348 # define write rpl_write
1350 _GL_FUNCDECL_RPL (write, ssize_t, (int fd, const void *buf, size_t count)
1351 _GL_ARG_NONNULL ((2)));
1352 _GL_CXXALIAS_RPL (write, ssize_t, (int fd, const void *buf, size_t count));
1354 /* Need to cast, because on mingw, the third parameter is
1356 and the return type is 'int'. */
1357 _GL_CXXALIAS_SYS_CAST (write, ssize_t, (int fd, const void *buf, size_t count));
1359 _GL_CXXALIASWARN (write);
1363 #endif /* _GL_UNISTD_H */
1364 #endif /* _GL_UNISTD_H */