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>. */
86 #if ((@GNULIB_GETCWD@ || defined GNULIB_POSIXCHECK) \
87 && ((defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__))
91 /* AIX and OSF/1 5.1 declare getdomainname in <netdb.h>, not in <unistd.h>. */
92 /* But avoid namespace pollution on glibc systems. */
93 #if @GNULIB_GETDOMAINNAME@ && (defined _AIX || defined __osf__) \
98 #if (@GNULIB_WRITE@ || @GNULIB_READLINK@ || @GNULIB_READLINKAT@ \
99 || @GNULIB_PREAD@ || @GNULIB_PWRITE@ || defined GNULIB_POSIXCHECK)
101 # include <sys/types.h>
104 /* Get getopt(), optarg, optind, opterr, optopt.
105 But avoid namespace pollution on glibc systems. */
106 #if @GNULIB_UNISTD_H_GETOPT@ && !defined __GLIBC__ && !defined _GL_SYSTEM_GETOPT
110 /* The definitions of _GL_FUNCDECL_RPL etc. are copied here. */
112 /* The definition of _GL_ARG_NONNULL is copied here. */
114 /* The definition of _GL_WARN_ON_USE is copied here. */
117 #if @GNULIB_GETHOSTNAME@
118 /* Get all possible declarations of gethostname(). */
119 # if @UNISTD_H_HAVE_WINSOCK2_H@
120 # if !defined _GL_SYS_SOCKET_H
121 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
123 # define socket socket_used_without_including_sys_socket_h
125 # define connect connect_used_without_including_sys_socket_h
127 # define accept accept_used_without_including_sys_socket_h
129 # define bind bind_used_without_including_sys_socket_h
131 # define getpeername getpeername_used_without_including_sys_socket_h
133 # define getsockname getsockname_used_without_including_sys_socket_h
135 # define getsockopt getsockopt_used_without_including_sys_socket_h
137 # define listen listen_used_without_including_sys_socket_h
139 # define recv recv_used_without_including_sys_socket_h
141 # define send send_used_without_including_sys_socket_h
143 # define recvfrom recvfrom_used_without_including_sys_socket_h
145 # define sendto sendto_used_without_including_sys_socket_h
147 # define setsockopt setsockopt_used_without_including_sys_socket_h
149 # define shutdown shutdown_used_without_including_sys_socket_h
151 _GL_WARN_ON_USE (socket,
152 "socket() used without including <sys/socket.h>");
153 _GL_WARN_ON_USE (connect,
154 "connect() used without including <sys/socket.h>");
155 _GL_WARN_ON_USE (accept,
156 "accept() used without including <sys/socket.h>");
157 _GL_WARN_ON_USE (bind,
158 "bind() used without including <sys/socket.h>");
159 _GL_WARN_ON_USE (getpeername,
160 "getpeername() used without including <sys/socket.h>");
161 _GL_WARN_ON_USE (getsockname,
162 "getsockname() used without including <sys/socket.h>");
163 _GL_WARN_ON_USE (getsockopt,
164 "getsockopt() used without including <sys/socket.h>");
165 _GL_WARN_ON_USE (listen,
166 "listen() used without including <sys/socket.h>");
167 _GL_WARN_ON_USE (recv,
168 "recv() used without including <sys/socket.h>");
169 _GL_WARN_ON_USE (send,
170 "send() used without including <sys/socket.h>");
171 _GL_WARN_ON_USE (recvfrom,
172 "recvfrom() used without including <sys/socket.h>");
173 _GL_WARN_ON_USE (sendto,
174 "sendto() used without including <sys/socket.h>");
175 _GL_WARN_ON_USE (setsockopt,
176 "setsockopt() used without including <sys/socket.h>");
177 _GL_WARN_ON_USE (shutdown,
178 "shutdown() used without including <sys/socket.h>");
181 # if !defined _GL_SYS_SELECT_H
182 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
184 # define select select_used_without_including_sys_select_h
186 _GL_WARN_ON_USE (select,
187 "select() used without including <sys/select.h>");
194 /* OS/2 EMX lacks these macros. */
196 # define STDIN_FILENO 0
198 #ifndef STDOUT_FILENO
199 # define STDOUT_FILENO 1
201 #ifndef STDERR_FILENO
202 # define STDERR_FILENO 2
205 /* Ensure *_OK macros exist. */
214 /* Declare overridden functions. */
217 #if defined GNULIB_POSIXCHECK
218 /* The access() function is a security risk. */
219 _GL_WARN_ON_USE (access, "the access function is a security risk - "
220 "use the gnulib module faccessat instead");
225 /* Change the owner of FILE to UID (if UID is not -1) and the group of FILE
226 to GID (if GID is not -1). Follow symbolic links.
227 Return 0 if successful, otherwise -1 and errno set.
228 See the POSIX:2001 specification
229 <http://www.opengroup.org/susv3xsh/chown.html>. */
231 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
233 # define chown rpl_chown
235 _GL_FUNCDECL_RPL (chown, int, (const char *file, uid_t uid, gid_t gid)
236 _GL_ARG_NONNULL ((1)));
237 _GL_CXXALIAS_RPL (chown, int, (const char *file, uid_t uid, gid_t gid));
240 _GL_FUNCDECL_SYS (chown, int, (const char *file, uid_t uid, gid_t gid)
241 _GL_ARG_NONNULL ((1)));
243 _GL_CXXALIAS_SYS (chown, int, (const char *file, uid_t uid, gid_t gid));
245 _GL_CXXALIASWARN (chown);
246 #elif defined GNULIB_POSIXCHECK
248 # if HAVE_RAW_DECL_CHOWN
249 _GL_WARN_ON_USE (chown, "chown fails to follow symlinks on some systems and "
250 "doesn't treat a uid or gid of -1 on some systems - "
251 "use gnulib module chown for portability");
258 /* Automatically included by modules that need a replacement for close. */
259 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
261 # define close rpl_close
263 _GL_FUNCDECL_RPL (close, int, (int fd));
264 _GL_CXXALIAS_RPL (close, int, (int fd));
266 _GL_CXXALIAS_SYS (close, int, (int fd));
268 _GL_CXXALIASWARN (close);
269 #elif @UNISTD_H_HAVE_WINSOCK2_H_AND_USE_SOCKETS@
271 # define close close_used_without_requesting_gnulib_module_close
272 #elif defined GNULIB_POSIXCHECK
274 /* Assume close is always declared. */
275 _GL_WARN_ON_USE (close, "close does not portably work on sockets - "
276 "use gnulib module close for portability");
281 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
284 _GL_FUNCDECL_RPL (dup, int, (int oldfd));
285 _GL_CXXALIAS_RPL (dup, int, (int oldfd));
287 _GL_CXXALIAS_SYS (dup, int, (int oldfd));
289 _GL_CXXALIASWARN (dup);
293 /* Copy the file descriptor OLDFD into file descriptor NEWFD. Do nothing if
294 NEWFD = OLDFD, otherwise close NEWFD first if it is open.
295 Return newfd if successful, otherwise -1 and errno set.
296 See the POSIX:2001 specification
297 <http://www.opengroup.org/susv3xsh/dup2.html>. */
299 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
300 # define dup2 rpl_dup2
302 _GL_FUNCDECL_RPL (dup2, int, (int oldfd, int newfd));
303 _GL_CXXALIAS_RPL (dup2, int, (int oldfd, int newfd));
306 _GL_FUNCDECL_SYS (dup2, int, (int oldfd, int newfd));
308 _GL_CXXALIAS_SYS (dup2, int, (int oldfd, int newfd));
310 _GL_CXXALIASWARN (dup2);
311 #elif defined GNULIB_POSIXCHECK
313 # if HAVE_RAW_DECL_DUP2
314 _GL_WARN_ON_USE (dup2, "dup2 is unportable - "
315 "use gnulib module dup2 for portability");
321 /* Copy the file descriptor OLDFD into file descriptor NEWFD, with the
323 The flags are a bitmask, possibly including O_CLOEXEC (defined in <fcntl.h>)
324 and O_TEXT, O_BINARY (defined in "binary-io.h").
325 Close NEWFD first if it is open.
326 Return newfd if successful, otherwise -1 and errno set.
327 See the Linux man page at
328 <http://www.kernel.org/doc/man-pages/online/pages/man2/dup3.2.html>. */
330 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
331 # define dup3 rpl_dup3
333 _GL_FUNCDECL_RPL (dup3, int, (int oldfd, int newfd, int flags));
334 _GL_CXXALIAS_RPL (dup3, int, (int oldfd, int newfd, int flags));
336 _GL_FUNCDECL_SYS (dup3, int, (int oldfd, int newfd, int flags));
337 _GL_CXXALIAS_SYS (dup3, int, (int oldfd, int newfd, int flags));
339 _GL_CXXALIASWARN (dup3);
340 #elif defined GNULIB_POSIXCHECK
342 # if HAVE_RAW_DECL_DUP3
343 _GL_WARN_ON_USE (dup3, "dup3 is unportable - "
344 "use gnulib module dup3 for portability");
350 # if !@HAVE_DECL_ENVIRON@
351 /* Set of environment variables and values. An array of strings of the form
352 "VARIABLE=VALUE", terminated with a NULL. */
353 # if defined __APPLE__ && defined __MACH__
354 # include <crt_externs.h>
355 # define environ (*_NSGetEnviron ())
360 extern char **environ;
366 #elif defined GNULIB_POSIXCHECK
367 # if HAVE_RAW_DECL_ENVIRON
368 static inline char ***
373 _GL_WARN_ON_USE (rpl_environ, "environ is unportable - "
374 "use gnulib module environ for portability");
376 # define environ (*rpl_environ ())
381 #if @GNULIB_EUIDACCESS@
382 /* Like access(), except that it uses the effective user id and group id of
383 the current process. */
384 # if !@HAVE_EUIDACCESS@
385 _GL_FUNCDECL_SYS (euidaccess, int, (const char *filename, int mode)
386 _GL_ARG_NONNULL ((1)));
388 _GL_CXXALIAS_SYS (euidaccess, int, (const char *filename, int mode));
389 _GL_CXXALIASWARN (euidaccess);
390 # if defined GNULIB_POSIXCHECK
391 /* Like access(), this function is a security risk. */
392 _GL_WARN_ON_USE (euidaccess, "the euidaccess function is a security risk - "
393 "use the gnulib module faccessat instead");
395 #elif defined GNULIB_POSIXCHECK
397 # if HAVE_RAW_DECL_EUIDACCESS
398 _GL_WARN_ON_USE (euidaccess, "euidaccess is unportable - "
399 "use gnulib module euidaccess for portability");
404 #if @GNULIB_FACCESSAT@
405 # if !@HAVE_FACCESSAT@
406 _GL_FUNCDECL_SYS (faccessat, int,
407 (int fd, char const *file, int mode, int flag)
408 _GL_ARG_NONNULL ((2)));
410 _GL_CXXALIAS_SYS (faccessat, int,
411 (int fd, char const *file, int mode, int flag));
412 _GL_CXXALIASWARN (faccessat);
413 #elif defined GNULIB_POSIXCHECK
415 # if HAVE_RAW_DECL_FACCESSAT
416 _GL_WARN_ON_USE (faccessat, "faccessat is not portable - "
417 "use gnulib module faccessat for portability");
423 /* Change the process' current working directory to the directory on which
424 the given file descriptor is open.
425 Return 0 if successful, otherwise -1 and errno set.
426 See the POSIX:2001 specification
427 <http://www.opengroup.org/susv3xsh/fchdir.html>. */
429 _GL_FUNCDECL_SYS (fchdir, int, (int /*fd*/));
431 /* Gnulib internal hooks needed to maintain the fchdir metadata. */
432 _GL_EXTERN_C int _gl_register_fd (int fd, const char *filename)
433 _GL_ARG_NONNULL ((2));
434 _GL_EXTERN_C void _gl_unregister_fd (int fd);
435 _GL_EXTERN_C int _gl_register_dup (int oldfd, int newfd);
436 _GL_EXTERN_C const char *_gl_directory_name (int fd);
439 # if !@HAVE_DECL_FCHDIR@
440 _GL_FUNCDECL_SYS (fchdir, int, (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 and OSF/1 5.1 systems, the second
660 _GL_CXXALIAS_SYS_CAST (gethostname, int, (char *name, size_t len));
662 _GL_CXXALIASWARN (gethostname);
663 #elif @UNISTD_H_HAVE_WINSOCK2_H@
665 # define gethostname gethostname_used_without_requesting_gnulib_module_gethostname
666 #elif defined GNULIB_POSIXCHECK
668 # if HAVE_RAW_DECL_GETHOSTNAME
669 _GL_WARN_ON_USE (gethostname, "gethostname is unportable - "
670 "use gnulib module gethostname for portability");
675 #if @GNULIB_GETLOGIN@
676 /* Returns the user's login name, or NULL if it cannot be found. Upon error,
677 returns NULL with errno set.
679 See <http://www.opengroup.org/susv3xsh/getlogin.html>.
681 Most programs don't need to use this function, because the information is
682 available through environment variables:
683 ${LOGNAME-$USER} on Unix platforms,
684 $USERNAME on native Windows platforms.
686 # if !@HAVE_GETLOGIN@
687 _GL_FUNCDECL_SYS (getlogin, char *, (void));
689 _GL_CXXALIAS_SYS (getlogin, char *, (void));
690 _GL_CXXALIASWARN (getlogin);
691 #elif defined GNULIB_POSIXCHECK
693 # if HAVE_RAW_DECL_GETLOGIN
694 _GL_WARN_ON_USE (getlogin, "getlogin is unportable - "
695 "use gnulib module getlogin for portability");
700 #if @GNULIB_GETLOGIN_R@
701 /* Copies the user's login name to NAME.
702 The array pointed to by NAME has room for SIZE bytes.
704 Returns 0 if successful. Upon error, an error number is returned, or -1 in
705 the case that the login name cannot be found but no specific error is
706 provided (this case is hopefully rare but is left open by the POSIX spec).
708 See <http://www.opengroup.org/susv3xsh/getlogin.html>.
710 Most programs don't need to use this function, because the information is
711 available through environment variables:
712 ${LOGNAME-$USER} on Unix platforms,
713 $USERNAME on native Windows platforms.
715 # if @REPLACE_GETLOGIN_R@
716 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
717 # define getlogin_r rpl_getlogin_r
719 _GL_FUNCDECL_RPL (getlogin_r, int, (char *name, size_t size)
720 _GL_ARG_NONNULL ((1)));
721 _GL_CXXALIAS_RPL (getlogin_r, int, (char *name, size_t size));
723 # if !@HAVE_DECL_GETLOGIN_R@
724 _GL_FUNCDECL_SYS (getlogin_r, int, (char *name, size_t size)
725 _GL_ARG_NONNULL ((1)));
727 /* Need to cast, because on Solaris 10 systems, the second argument is
729 _GL_CXXALIAS_SYS_CAST (getlogin_r, int, (char *name, size_t size));
731 _GL_CXXALIASWARN (getlogin_r);
732 #elif defined GNULIB_POSIXCHECK
734 # if HAVE_RAW_DECL_GETLOGIN_R
735 _GL_WARN_ON_USE (getlogin_r, "getlogin_r is unportable - "
736 "use gnulib module getlogin_r for portability");
741 #if @GNULIB_GETPAGESIZE@
742 # if @REPLACE_GETPAGESIZE@
743 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
744 # define getpagesize rpl_getpagesize
746 _GL_FUNCDECL_RPL (getpagesize, int, (void));
747 _GL_CXXALIAS_RPL (getpagesize, int, (void));
749 # if !@HAVE_GETPAGESIZE@
750 # if !defined getpagesize
751 /* This is for POSIX systems. */
752 # if !defined _gl_getpagesize && defined _SC_PAGESIZE
753 # if ! (defined __VMS && __VMS_VER < 70000000)
754 # define _gl_getpagesize() sysconf (_SC_PAGESIZE)
757 /* This is for older VMS. */
758 # if !defined _gl_getpagesize && defined __VMS
760 # define _gl_getpagesize() 8192
762 # define _gl_getpagesize() 512
765 /* This is for BeOS. */
766 # if !defined _gl_getpagesize && @HAVE_OS_H@
768 # if defined B_PAGE_SIZE
769 # define _gl_getpagesize() B_PAGE_SIZE
772 /* This is for AmigaOS4.0. */
773 # if !defined _gl_getpagesize && defined __amigaos4__
774 # define _gl_getpagesize() 2048
776 /* This is for older Unix systems. */
777 # if !defined _gl_getpagesize && @HAVE_SYS_PARAM_H@
778 # include <sys/param.h>
779 # ifdef EXEC_PAGESIZE
780 # define _gl_getpagesize() EXEC_PAGESIZE
786 # define _gl_getpagesize() (NBPG * CLSIZE)
789 # define _gl_getpagesize() NBPC
794 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
795 # define getpagesize() _gl_getpagesize ()
800 return _gl_getpagesize ();
805 /* Need to cast, because on Cygwin 1.5.x systems, the return type is size_t. */
806 _GL_CXXALIAS_SYS_CAST (getpagesize, int, (void));
808 # if @HAVE_DECL_GETPAGESIZE@
809 _GL_CXXALIASWARN (getpagesize);
811 #elif defined GNULIB_POSIXCHECK
813 # if HAVE_RAW_DECL_GETPAGESIZE
814 _GL_WARN_ON_USE (getpagesize, "getpagesize is unportable - "
815 "use gnulib module getpagesize for portability");
820 #if @GNULIB_GETUSERSHELL@
821 /* Return the next valid login shell on the system, or NULL when the end of
822 the list has been reached. */
823 # if !@HAVE_DECL_GETUSERSHELL@
824 _GL_FUNCDECL_SYS (getusershell, char *, (void));
826 _GL_CXXALIAS_SYS (getusershell, char *, (void));
827 _GL_CXXALIASWARN (getusershell);
828 #elif defined GNULIB_POSIXCHECK
830 # if HAVE_RAW_DECL_GETUSERSHELL
831 _GL_WARN_ON_USE (getusershell, "getusershell is unportable - "
832 "use gnulib module getusershell for portability");
836 #if @GNULIB_GETUSERSHELL@
837 /* Rewind to pointer that is advanced at each getusershell() call. */
838 # if !@HAVE_DECL_GETUSERSHELL@
839 _GL_FUNCDECL_SYS (setusershell, void, (void));
841 _GL_CXXALIAS_SYS (setusershell, void, (void));
842 _GL_CXXALIASWARN (setusershell);
843 #elif defined GNULIB_POSIXCHECK
845 # if HAVE_RAW_DECL_SETUSERSHELL
846 _GL_WARN_ON_USE (setusershell, "setusershell is unportable - "
847 "use gnulib module getusershell for portability");
851 #if @GNULIB_GETUSERSHELL@
852 /* Free the pointer that is advanced at each getusershell() call and
853 associated resources. */
854 # if !@HAVE_DECL_GETUSERSHELL@
855 _GL_FUNCDECL_SYS (endusershell, void, (void));
857 _GL_CXXALIAS_SYS (endusershell, void, (void));
858 _GL_CXXALIASWARN (endusershell);
859 #elif defined GNULIB_POSIXCHECK
861 # if HAVE_RAW_DECL_ENDUSERSHELL
862 _GL_WARN_ON_USE (endusershell, "endusershell is unportable - "
863 "use gnulib module getusershell for portability");
869 /* Change the owner of FILE to UID (if UID is not -1) and the group of FILE
870 to GID (if GID is not -1). Do not follow symbolic links.
871 Return 0 if successful, otherwise -1 and errno set.
872 See the POSIX:2001 specification
873 <http://www.opengroup.org/susv3xsh/lchown.html>. */
874 # if @REPLACE_LCHOWN@
875 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
877 # define lchown rpl_lchown
879 _GL_FUNCDECL_RPL (lchown, int, (char const *file, uid_t owner, gid_t group)
880 _GL_ARG_NONNULL ((1)));
881 _GL_CXXALIAS_RPL (lchown, int, (char const *file, uid_t owner, gid_t group));
884 _GL_FUNCDECL_SYS (lchown, int, (char const *file, uid_t owner, gid_t group)
885 _GL_ARG_NONNULL ((1)));
887 _GL_CXXALIAS_SYS (lchown, int, (char const *file, uid_t owner, gid_t group));
889 _GL_CXXALIASWARN (lchown);
890 #elif defined GNULIB_POSIXCHECK
892 # if HAVE_RAW_DECL_LCHOWN
893 _GL_WARN_ON_USE (lchown, "lchown is unportable to pre-POSIX.1-2001 systems - "
894 "use gnulib module lchown for portability");
900 /* Create a new hard link for an existing file.
901 Return 0 if successful, otherwise -1 and errno set.
902 See POSIX:2001 specification
903 <http://www.opengroup.org/susv3xsh/link.html>. */
905 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
906 # define link rpl_link
908 _GL_FUNCDECL_RPL (link, int, (const char *path1, const char *path2)
909 _GL_ARG_NONNULL ((1, 2)));
910 _GL_CXXALIAS_RPL (link, int, (const char *path1, const char *path2));
913 _GL_FUNCDECL_SYS (link, int, (const char *path1, const char *path2)
914 _GL_ARG_NONNULL ((1, 2)));
916 _GL_CXXALIAS_SYS (link, int, (const char *path1, const char *path2));
918 _GL_CXXALIASWARN (link);
919 #elif defined GNULIB_POSIXCHECK
921 # if HAVE_RAW_DECL_LINK
922 _GL_WARN_ON_USE (link, "link is unportable - "
923 "use gnulib module link for portability");
929 /* Create a new hard link for an existing file, relative to two
930 directories. FLAG controls whether symlinks are followed.
931 Return 0 if successful, otherwise -1 and errno set. */
932 # if @REPLACE_LINKAT@
933 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
935 # define linkat rpl_linkat
937 _GL_FUNCDECL_RPL (linkat, int,
938 (int fd1, const char *path1, int fd2, const char *path2,
940 _GL_ARG_NONNULL ((2, 4)));
941 _GL_CXXALIAS_RPL (linkat, int,
942 (int fd1, const char *path1, int fd2, const char *path2,
946 _GL_FUNCDECL_SYS (linkat, int,
947 (int fd1, const char *path1, int fd2, const char *path2,
949 _GL_ARG_NONNULL ((2, 4)));
951 _GL_CXXALIAS_SYS (linkat, int,
952 (int fd1, const char *path1, int fd2, const char *path2,
955 _GL_CXXALIASWARN (linkat);
956 #elif defined GNULIB_POSIXCHECK
958 # if HAVE_RAW_DECL_LINKAT
959 _GL_WARN_ON_USE (linkat, "linkat is unportable - "
960 "use gnulib module linkat for portability");
966 /* Set the offset of FD relative to SEEK_SET, SEEK_CUR, or SEEK_END.
967 Return the new offset if successful, otherwise -1 and errno set.
968 See the POSIX:2001 specification
969 <http://www.opengroup.org/susv3xsh/lseek.html>. */
971 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
972 # define lseek rpl_lseek
974 _GL_FUNCDECL_RPL (lseek, off_t, (int fd, off_t offset, int whence));
975 _GL_CXXALIAS_RPL (lseek, off_t, (int fd, off_t offset, int whence));
977 _GL_CXXALIAS_SYS (lseek, off_t, (int fd, off_t offset, int whence));
979 _GL_CXXALIASWARN (lseek);
980 #elif defined GNULIB_POSIXCHECK
982 # if HAVE_RAW_DECL_LSEEK
983 _GL_WARN_ON_USE (lseek, "lseek does not fail with ESPIPE on pipes on some "
984 "systems - use gnulib module lseek for portability");
990 /* Create a pipe, defaulting to O_BINARY mode.
991 Store the read-end as fd[0] and the write-end as fd[1].
992 Return 0 upon success, or -1 with errno set upon failure. */
994 _GL_FUNCDECL_SYS (pipe, int, (int fd[2]) _GL_ARG_NONNULL ((1)));
996 _GL_CXXALIAS_SYS (pipe, int, (int fd[2]));
997 _GL_CXXALIASWARN (pipe);
998 #elif defined GNULIB_POSIXCHECK
1000 # if HAVE_RAW_DECL_PIPE
1001 _GL_WARN_ON_USE (pipe, "pipe is unportable - "
1002 "use gnulib module pipe-posix for portability");
1008 /* Create a pipe, applying the given flags when opening the read-end of the
1009 pipe and the write-end of the pipe.
1010 The flags are a bitmask, possibly including O_CLOEXEC (defined in <fcntl.h>)
1011 and O_TEXT, O_BINARY (defined in "binary-io.h").
1012 Store the read-end as fd[0] and the write-end as fd[1].
1013 Return 0 upon success, or -1 with errno set upon failure.
1014 See also the Linux man page at
1015 <http://www.kernel.org/doc/man-pages/online/pages/man2/pipe2.2.html>. */
1017 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1018 # define pipe2 rpl_pipe2
1020 _GL_FUNCDECL_RPL (pipe2, int, (int fd[2], int flags) _GL_ARG_NONNULL ((1)));
1021 _GL_CXXALIAS_RPL (pipe2, int, (int fd[2], int flags));
1023 _GL_FUNCDECL_SYS (pipe2, int, (int fd[2], int flags) _GL_ARG_NONNULL ((1)));
1024 _GL_CXXALIAS_SYS (pipe2, int, (int fd[2], int flags));
1026 _GL_CXXALIASWARN (pipe2);
1027 #elif defined GNULIB_POSIXCHECK
1029 # if HAVE_RAW_DECL_PIPE2
1030 _GL_WARN_ON_USE (pipe2, "pipe2 is unportable - "
1031 "use gnulib module pipe2 for portability");
1037 /* Read at most BUFSIZE bytes from FD into BUF, starting at OFFSET.
1038 Return the number of bytes placed into BUF if successful, otherwise
1039 set errno and return -1. 0 indicates EOF. See the POSIX:2001
1040 specification <http://www.opengroup.org/susv3xsh/pread.html>. */
1041 # if @REPLACE_PREAD@
1042 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1043 # define pread rpl_pread
1045 _GL_FUNCDECL_RPL (pread, ssize_t,
1046 (int fd, void *buf, size_t bufsize, off_t offset)
1047 _GL_ARG_NONNULL ((2)));
1048 _GL_CXXALIAS_RPL (pread, ssize_t,
1049 (int fd, void *buf, size_t bufsize, off_t offset));
1052 _GL_FUNCDECL_SYS (pread, ssize_t,
1053 (int fd, void *buf, size_t bufsize, off_t offset)
1054 _GL_ARG_NONNULL ((2)));
1056 _GL_CXXALIAS_SYS (pread, ssize_t,
1057 (int fd, void *buf, size_t bufsize, off_t offset));
1059 _GL_CXXALIASWARN (pread);
1060 #elif defined GNULIB_POSIXCHECK
1062 # if HAVE_RAW_DECL_PREAD
1063 _GL_WARN_ON_USE (pread, "pread is unportable - "
1064 "use gnulib module pread for portability");
1070 /* Write at most BUFSIZE bytes from BUF into FD, starting at OFFSET.
1071 Return the number of bytes written if successful, otherwise
1072 set errno and return -1. 0 indicates nothing written. See the
1073 POSIX:2001 specification
1074 <http://www.opengroup.org/susv3xsh/pwrite.html>. */
1075 # if @REPLACE_PWRITE@
1076 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1077 # define pwrite rpl_pwrite
1079 _GL_FUNCDECL_RPL (pwrite, ssize_t,
1080 (int fd, const void *buf, size_t bufsize, off_t offset)
1081 _GL_ARG_NONNULL ((2)));
1082 _GL_CXXALIAS_RPL (pwrite, ssize_t,
1083 (int fd, const void *buf, size_t bufsize, off_t offset));
1086 _GL_FUNCDECL_SYS (pwrite, ssize_t,
1087 (int fd, const void *buf, size_t bufsize, off_t offset)
1088 _GL_ARG_NONNULL ((2)));
1090 _GL_CXXALIAS_SYS (pwrite, ssize_t,
1091 (int fd, const void *buf, size_t bufsize, off_t offset));
1093 _GL_CXXALIASWARN (pwrite);
1094 #elif defined GNULIB_POSIXCHECK
1096 # if HAVE_RAW_DECL_PWRITE
1097 _GL_WARN_ON_USE (pwrite, "pwrite is unportable - "
1098 "use gnulib module pwrite for portability");
1103 #if @GNULIB_READLINK@
1104 /* Read the contents of the symbolic link FILE and place the first BUFSIZE
1105 bytes of it into BUF. Return the number of bytes placed into BUF if
1106 successful, otherwise -1 and errno set.
1107 See the POSIX:2001 specification
1108 <http://www.opengroup.org/susv3xsh/readlink.html>. */
1109 # if @REPLACE_READLINK@
1110 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1111 # define readlink rpl_readlink
1113 _GL_FUNCDECL_RPL (readlink, ssize_t,
1114 (const char *file, char *buf, size_t bufsize)
1115 _GL_ARG_NONNULL ((1, 2)));
1116 _GL_CXXALIAS_RPL (readlink, ssize_t,
1117 (const char *file, char *buf, size_t bufsize));
1119 # if !@HAVE_READLINK@
1120 _GL_FUNCDECL_SYS (readlink, ssize_t,
1121 (const char *file, char *buf, size_t bufsize)
1122 _GL_ARG_NONNULL ((1, 2)));
1124 _GL_CXXALIAS_SYS (readlink, ssize_t,
1125 (const char *file, char *buf, size_t bufsize));
1127 _GL_CXXALIASWARN (readlink);
1128 #elif defined GNULIB_POSIXCHECK
1130 # if HAVE_RAW_DECL_READLINK
1131 _GL_WARN_ON_USE (readlink, "readlink is unportable - "
1132 "use gnulib module readlink for portability");
1137 #if @GNULIB_READLINKAT@
1138 # if !@HAVE_READLINKAT@
1139 _GL_FUNCDECL_SYS (readlinkat, ssize_t,
1140 (int fd, char const *file, char *buf, size_t len)
1141 _GL_ARG_NONNULL ((2, 3)));
1143 _GL_CXXALIAS_SYS (readlinkat, ssize_t,
1144 (int fd, char const *file, char *buf, size_t len));
1145 _GL_CXXALIASWARN (readlinkat);
1146 #elif defined GNULIB_POSIXCHECK
1148 # if HAVE_RAW_DECL_READLINKAT
1149 _GL_WARN_ON_USE (readlinkat, "readlinkat is not portable - "
1150 "use gnulib module readlinkat for portability");
1156 /* Remove the directory DIR. */
1157 # if @REPLACE_RMDIR@
1158 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1159 # define rmdir rpl_rmdir
1161 _GL_FUNCDECL_RPL (rmdir, int, (char const *name) _GL_ARG_NONNULL ((1)));
1162 _GL_CXXALIAS_RPL (rmdir, int, (char const *name));
1164 _GL_CXXALIAS_SYS (rmdir, int, (char const *name));
1166 _GL_CXXALIASWARN (rmdir);
1167 #elif defined GNULIB_POSIXCHECK
1169 # if HAVE_RAW_DECL_RMDIR
1170 _GL_WARN_ON_USE (rmdir, "rmdir is unportable - "
1171 "use gnulib module rmdir for portability");
1177 /* Pause the execution of the current thread for N seconds.
1178 Returns the number of seconds left to sleep.
1179 See the POSIX:2001 specification
1180 <http://www.opengroup.org/susv3xsh/sleep.html>. */
1181 # if @REPLACE_SLEEP@
1182 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1184 # define sleep rpl_sleep
1186 _GL_FUNCDECL_RPL (sleep, unsigned int, (unsigned int n));
1187 _GL_CXXALIAS_RPL (sleep, unsigned int, (unsigned int n));
1190 _GL_FUNCDECL_SYS (sleep, unsigned int, (unsigned int n));
1192 _GL_CXXALIAS_SYS (sleep, unsigned int, (unsigned int n));
1194 _GL_CXXALIASWARN (sleep);
1195 #elif defined GNULIB_POSIXCHECK
1197 # if HAVE_RAW_DECL_SLEEP
1198 _GL_WARN_ON_USE (sleep, "sleep is unportable - "
1199 "use gnulib module sleep for portability");
1204 #if @GNULIB_SYMLINK@
1205 # if @REPLACE_SYMLINK@
1206 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1208 # define symlink rpl_symlink
1210 _GL_FUNCDECL_RPL (symlink, int, (char const *contents, char const *file)
1211 _GL_ARG_NONNULL ((1, 2)));
1212 _GL_CXXALIAS_RPL (symlink, int, (char const *contents, char const *file));
1214 # if !@HAVE_SYMLINK@
1215 _GL_FUNCDECL_SYS (symlink, int, (char const *contents, char const *file)
1216 _GL_ARG_NONNULL ((1, 2)));
1218 _GL_CXXALIAS_SYS (symlink, int, (char const *contents, char const *file));
1220 _GL_CXXALIASWARN (symlink);
1221 #elif defined GNULIB_POSIXCHECK
1223 # if HAVE_RAW_DECL_SYMLINK
1224 _GL_WARN_ON_USE (symlink, "symlink is not portable - "
1225 "use gnulib module symlink for portability");
1230 #if @GNULIB_SYMLINKAT@
1231 # if !@HAVE_SYMLINKAT@
1232 _GL_FUNCDECL_SYS (symlinkat, int,
1233 (char const *contents, int fd, char const *file)
1234 _GL_ARG_NONNULL ((1, 3)));
1236 _GL_CXXALIAS_SYS (symlinkat, int,
1237 (char const *contents, int fd, char const *file));
1238 _GL_CXXALIASWARN (symlinkat);
1239 #elif defined GNULIB_POSIXCHECK
1241 # if HAVE_RAW_DECL_SYMLINKAT
1242 _GL_WARN_ON_USE (symlinkat, "symlinkat is not portable - "
1243 "use gnulib module symlinkat for portability");
1248 #if @GNULIB_TTYNAME_R@
1249 /* Store at most BUFLEN characters of the pathname of the terminal FD is
1250 open on in BUF. Return 0 on success, otherwise an error number. */
1251 # if @REPLACE_TTYNAME_R@
1252 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1254 # define ttyname_r rpl_ttyname_r
1256 _GL_FUNCDECL_RPL (ttyname_r, int,
1257 (int fd, char *buf, size_t buflen) _GL_ARG_NONNULL ((2)));
1258 _GL_CXXALIAS_RPL (ttyname_r, int,
1259 (int fd, char *buf, size_t buflen));
1261 # if !@HAVE_DECL_TTYNAME_R@
1262 _GL_FUNCDECL_SYS (ttyname_r, int,
1263 (int fd, char *buf, size_t buflen) _GL_ARG_NONNULL ((2)));
1265 _GL_CXXALIAS_SYS (ttyname_r, int,
1266 (int fd, char *buf, size_t buflen));
1268 _GL_CXXALIASWARN (ttyname_r);
1269 #elif defined GNULIB_POSIXCHECK
1271 # if HAVE_RAW_DECL_TTYNAME_R
1272 _GL_WARN_ON_USE (ttyname_r, "ttyname_r is not portable - "
1273 "use gnulib module ttyname_r for portability");
1279 # if @REPLACE_UNLINK@
1280 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1282 # define unlink rpl_unlink
1284 _GL_FUNCDECL_RPL (unlink, int, (char const *file) _GL_ARG_NONNULL ((1)));
1285 _GL_CXXALIAS_RPL (unlink, int, (char const *file));
1287 _GL_CXXALIAS_SYS (unlink, int, (char const *file));
1289 _GL_CXXALIASWARN (unlink);
1290 #elif defined GNULIB_POSIXCHECK
1292 # if HAVE_RAW_DECL_UNLINK
1293 _GL_WARN_ON_USE (unlink, "unlink is not portable - "
1294 "use gnulib module unlink for portability");
1299 #if @GNULIB_UNLINKAT@
1300 # if @REPLACE_UNLINKAT@
1301 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1303 # define unlinkat rpl_unlinkat
1305 _GL_FUNCDECL_RPL (unlinkat, int, (int fd, char const *file, int flag)
1306 _GL_ARG_NONNULL ((2)));
1307 _GL_CXXALIAS_RPL (unlinkat, int, (int fd, char const *file, int flag));
1309 # if !@HAVE_UNLINKAT@
1310 _GL_FUNCDECL_SYS (unlinkat, int, (int fd, char const *file, int flag)
1311 _GL_ARG_NONNULL ((2)));
1313 _GL_CXXALIAS_SYS (unlinkat, int, (int fd, char const *file, int flag));
1315 _GL_CXXALIASWARN (unlinkat);
1316 #elif defined GNULIB_POSIXCHECK
1318 # if HAVE_RAW_DECL_UNLINKAT
1319 _GL_WARN_ON_USE (unlinkat, "unlinkat is not portable - "
1320 "use gnulib module openat for portability");
1326 /* Pause the execution of the current thread for N microseconds.
1327 Returns 0 on completion, or -1 on range error.
1328 See the POSIX:2001 specification
1329 <http://www.opengroup.org/susv3xsh/sleep.html>. */
1330 # if @REPLACE_USLEEP@
1331 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1333 # define usleep rpl_usleep
1335 _GL_FUNCDECL_RPL (usleep, int, (useconds_t n));
1336 _GL_CXXALIAS_RPL (usleep, int, (useconds_t n));
1339 _GL_FUNCDECL_SYS (usleep, int, (useconds_t n));
1341 _GL_CXXALIAS_SYS (usleep, int, (useconds_t n));
1343 _GL_CXXALIASWARN (usleep);
1344 #elif defined GNULIB_POSIXCHECK
1346 # if HAVE_RAW_DECL_USLEEP
1347 _GL_WARN_ON_USE (usleep, "usleep is unportable - "
1348 "use gnulib module usleep for portability");
1354 /* Write up to COUNT bytes starting at BUF to file descriptor FD.
1355 See the POSIX:2001 specification
1356 <http://www.opengroup.org/susv3xsh/write.html>. */
1357 # if @REPLACE_WRITE@ && @GNULIB_UNISTD_H_SIGPIPE@
1358 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1360 # define write rpl_write
1362 _GL_FUNCDECL_RPL (write, ssize_t, (int fd, const void *buf, size_t count)
1363 _GL_ARG_NONNULL ((2)));
1364 _GL_CXXALIAS_RPL (write, ssize_t, (int fd, const void *buf, size_t count));
1366 /* Need to cast, because on mingw, the third parameter is
1368 and the return type is 'int'. */
1369 _GL_CXXALIAS_SYS_CAST (write, ssize_t, (int fd, const void *buf, size_t count));
1371 _GL_CXXALIASWARN (write);
1375 #endif /* _GL_UNISTD_H */
1376 #endif /* _GL_UNISTD_H */