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/* Substitute for and wrapper around <unistd.h>.
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Copyright (C) 2003-2008 Free Software Foundation, Inc.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with this program; if not, write to the Free Software Foundation,
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Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
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@PRAGMA_SYSTEM_HEADER@
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/* The include_next requires a split double-inclusion guard. */
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# @INCLUDE_NEXT@ @NEXT_UNISTD_H@
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/* mingw doesn't define the SEEK_* macros in <unistd.h>. */
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#if !(defined SEEK_CUR && defined SEEK_END && defined SEEK_SET)
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/* mingw fails to declare _exit in <unistd.h>. */
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/* mingw, BeOS, Haiku declare environ in <stdlib.h>, not in <unistd.h>. */
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#if @GNULIB_WRITE@ && @REPLACE_WRITE@ && @GNULIB_UNISTD_H_SIGPIPE@
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# include <sys/types.h>
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#if @GNULIB_GETHOSTNAME@
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/* Get all possible declarations of gethostname(). */
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# if @UNISTD_H_HAVE_WINSOCK2_H@
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# include <winsock2.h>
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# if !defined _GL_SYS_SOCKET_H
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# define socket socket_used_without_including_sys_socket_h
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# define connect connect_used_without_including_sys_socket_h
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# define accept accept_used_without_including_sys_socket_h
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# define bind bind_used_without_including_sys_socket_h
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# define getpeername getpeername_used_without_including_sys_socket_h
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# define getsockname getsockname_used_without_including_sys_socket_h
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# define getsockopt getsockopt_used_without_including_sys_socket_h
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# define listen listen_used_without_including_sys_socket_h
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# define recv recv_used_without_including_sys_socket_h
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# define send send_used_without_including_sys_socket_h
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# define recvfrom recvfrom_used_without_including_sys_socket_h
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# define sendto sendto_used_without_including_sys_socket_h
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# define setsockopt setsockopt_used_without_including_sys_socket_h
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# define shutdown shutdown_used_without_including_sys_socket_h
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# if !defined _GL_SYS_SELECT_H
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# define select select_used_without_including_sys_select_h
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/* The definition of GL_LINK_WARNING is copied here. */
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/* Declare overridden functions. */
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# ifndef REPLACE_CHOWN
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# define REPLACE_CHOWN 1
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/* Change the owner of FILE to UID (if UID is not -1) and the group of FILE
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to GID (if GID is not -1). Follow symbolic links.
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Return 0 if successful, otherwise -1 and errno set.
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See the POSIX:2001 specification
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<http://www.opengroup.org/susv3xsh/chown.html>. */
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# define chown rpl_chown
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extern int chown (const char *file, uid_t uid, gid_t gid);
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#elif defined GNULIB_POSIXCHECK
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# define chown(f,u,g) \
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(GL_LINK_WARNING ("chown fails to follow symlinks on some systems and " \
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"doesn't treat a uid or gid of -1 on some systems - " \
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"use gnulib module chown for portability"), \
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# if @UNISTD_H_HAVE_WINSOCK2_H@
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/* Need a gnulib internal function. */
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# define HAVE__GL_CLOSE_FD_MAYBE_SOCKET 1
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/* Automatically included by modules that need a replacement for close. */
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# define close rpl_close
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extern int close (int);
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#elif @UNISTD_H_HAVE_WINSOCK2_H@
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# define close close_used_without_requesting_gnulib_module_close
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#elif defined GNULIB_POSIXCHECK
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(GL_LINK_WARNING ("close does not portably work on sockets - " \
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"use gnulib module close for portability"), \
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/* Copy the file descriptor OLDFD into file descriptor NEWFD. Do nothing if
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NEWFD = OLDFD, otherwise close NEWFD first if it is open.
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Return 0 if successful, otherwise -1 and errno set.
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See the POSIX:2001 specification
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<http://www.opengroup.org/susv3xsh/dup2.html>. */
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extern int dup2 (int oldfd, int newfd);
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#elif defined GNULIB_POSIXCHECK
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(GL_LINK_WARNING ("dup2 is unportable - " \
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"use gnulib module dup2 for portability"), \
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# if !@HAVE_DECL_ENVIRON@
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/* Set of environment variables and values. An array of strings of the form
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"VARIABLE=VALUE", terminated with a NULL. */
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# if defined __APPLE__ && defined __MACH__
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# include <crt_externs.h>
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# define environ (*_NSGetEnviron ())
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extern char **environ;
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#elif defined GNULIB_POSIXCHECK
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(GL_LINK_WARNING ("environ is unportable - " \
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"use gnulib module environ for portability"), \
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#if @GNULIB_EUIDACCESS@
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# if !@HAVE_EUIDACCESS@
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/* Like access(), except that is uses the effective user id and group id of
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the current process. */
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extern int euidaccess (const char *filename, int mode);
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#elif defined GNULIB_POSIXCHECK
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# define euidaccess(f,m) \
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(GL_LINK_WARNING ("euidaccess is unportable - " \
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"use gnulib module euidaccess for portability"), \
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# if @REPLACE_FCHDIR@
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/* Change the process' current working directory to the directory on which
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the given file descriptor is open.
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Return 0 if successful, otherwise -1 and errno set.
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See the POSIX:2001 specification
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<http://www.opengroup.org/susv3xsh/fchdir.html>. */
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extern int fchdir (int /*fd*/);
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extern int dup (int);
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# define dup2 rpl_dup2
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extern int dup2 (int, int);
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#elif defined GNULIB_POSIXCHECK
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(GL_LINK_WARNING ("fchdir is unportable - " \
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"use gnulib module fchdir for portability"), \
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/* Synchronize changes to a file.
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Return 0 if successful, otherwise -1 and errno set.
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See POSIX:2001 specification
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<http://www.opengroup.org/susv3xsh/fsync.html>. */
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extern int fsync (int fd);
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#elif defined GNULIB_POSIXCHECK
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(GL_LINK_WARNING ("fsync is unportable - " \
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"use gnulib module fsync for portability"), \
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#if @GNULIB_FTRUNCATE@
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# if !@HAVE_FTRUNCATE@
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/* Change the size of the file to which FD is opened to become equal to LENGTH.
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Return 0 if successful, otherwise -1 and errno set.
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See the POSIX:2001 specification
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<http://www.opengroup.org/susv3xsh/ftruncate.html>. */
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extern int ftruncate (int fd, off_t length);
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#elif defined GNULIB_POSIXCHECK
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# define ftruncate(f,l) \
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(GL_LINK_WARNING ("ftruncate is unportable - " \
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"use gnulib module ftruncate for portability"), \
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/* Include the headers that might declare getcwd so that they will not
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cause confusion if included after this file. */
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# if @REPLACE_GETCWD@
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/* Get the name of the current working directory, and put it in SIZE bytes
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Return BUF if successful, or NULL if the directory couldn't be determined
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or SIZE was too small.
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See the POSIX:2001 specification
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<http://www.opengroup.org/susv3xsh/getcwd.html>.
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Additionally, the gnulib module 'getcwd' guarantees the following GNU
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extension: If BUF is NULL, an array is allocated with 'malloc'; the array
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is SIZE bytes long, unless SIZE == 0, in which case it is as big as
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# define getcwd rpl_getcwd
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extern char * getcwd (char *buf, size_t size);
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#elif defined GNULIB_POSIXCHECK
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# define getcwd(b,s) \
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(GL_LINK_WARNING ("getcwd is unportable - " \
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"use gnulib module getcwd for portability"), \
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#if @GNULIB_GETDOMAINNAME@
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/* Return the NIS domain name of the machine.
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WARNING! The NIS domain name is unrelated to the fully qualified host name
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of the machine. It is also unrelated to email addresses.
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WARNING! The NIS domain name is usually the empty string or "(none)" when
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Put up to LEN bytes of the NIS domain name into NAME.
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Null terminate it if the name is shorter than LEN.
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If the NIS domain name is longer than LEN, set errno = EINVAL and return -1.
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Return 0 if successful, otherwise set errno and return -1. */
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# if !@HAVE_GETDOMAINNAME@
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extern int getdomainname(char *name, size_t len);
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#elif defined GNULIB_POSIXCHECK
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# undef getdomainname
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# define getdomainname(n,l) \
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(GL_LINK_WARNING ("getdomainname is unportable - " \
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"use gnulib module getdomainname for portability"), \
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getdomainname (n, l))
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#if @GNULIB_GETDTABLESIZE@
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# if !@HAVE_GETDTABLESIZE@
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/* Return the maximum number of file descriptors in the current process. */
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extern int getdtablesize (void);
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#elif defined GNULIB_POSIXCHECK
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# undef getdtablesize
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# define getdtablesize() \
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(GL_LINK_WARNING ("getdtablesize is unportable - " \
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"use gnulib module getdtablesize for portability"), \
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#if @GNULIB_GETHOSTNAME@
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/* Return the standard host name of the machine.
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WARNING! The host name may or may not be fully qualified.
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Put up to LEN bytes of the host name into NAME.
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Null terminate it if the name is shorter than LEN.
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If the host name is longer than LEN, set errno = EINVAL and return -1.
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Return 0 if successful, otherwise set errno and return -1. */
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# if @UNISTD_H_HAVE_WINSOCK2_H@
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# define gethostname rpl_gethostname
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# if @UNISTD_H_HAVE_WINSOCK2_H@ || !@HAVE_GETHOSTNAME@
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extern int gethostname(char *name, size_t len);
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#elif @UNISTD_H_HAVE_WINSOCK2_H@
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# define gethostname gethostname_used_without_requesting_gnulib_module_gethostname
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#elif defined GNULIB_POSIXCHECK
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# define gethostname(n,l) \
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(GL_LINK_WARNING ("gethostname is unportable - " \
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"use gnulib module gethostname for portability"), \
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#if @GNULIB_GETLOGIN_R@
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/* Copies the user's login name to NAME.
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The array pointed to by NAME has room for SIZE bytes.
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Returns 0 if successful. Upon error, an error number is returned, or -1 in
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the case that the login name cannot be found but no specific error is
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provided (this case is hopefully rare but is left open by the POSIX spec).
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See <http://www.opengroup.org/susv3xsh/getlogin.html>.
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# if !@HAVE_DECL_GETLOGIN_R@
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extern int getlogin_r (char *name, size_t size);
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#elif defined GNULIB_POSIXCHECK
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# define getlogin_r(n,s) \
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(GL_LINK_WARNING ("getlogin_r is unportable - " \
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"use gnulib module getlogin_r for portability"), \
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#if @GNULIB_GETPAGESIZE@
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# if @REPLACE_GETPAGESIZE@
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# define getpagesize rpl_getpagesize
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extern int getpagesize (void);
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# elif !@HAVE_GETPAGESIZE@
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/* This is for POSIX systems. */
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# if !defined getpagesize && defined _SC_PAGESIZE
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# if ! (defined __VMS && __VMS_VER < 70000000)
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# define getpagesize() sysconf (_SC_PAGESIZE)
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/* This is for older VMS. */
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# if !defined getpagesize && defined __VMS
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# define getpagesize() 8192
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# define getpagesize() 512
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/* This is for BeOS. */
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# if !defined getpagesize && @HAVE_OS_H@
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# if defined B_PAGE_SIZE
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# define getpagesize() B_PAGE_SIZE
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/* This is for AmigaOS4.0. */
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# if !defined getpagesize && defined __amigaos4__
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# define getpagesize() 2048
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/* This is for older Unix systems. */
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# if !defined getpagesize && @HAVE_SYS_PARAM_H@
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# include <sys/param.h>
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# ifdef EXEC_PAGESIZE
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# define getpagesize() EXEC_PAGESIZE
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# define getpagesize() (NBPG * CLSIZE)
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# define getpagesize() NBPC
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#elif defined GNULIB_POSIXCHECK
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# define getpagesize() \
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(GL_LINK_WARNING ("getpagesize is unportable - " \
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"use gnulib module getpagesize for portability"), \
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#if @GNULIB_GETUSERSHELL@
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# if !@HAVE_GETUSERSHELL@
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/* Return the next valid login shell on the system, or NULL when the end of
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the list has been reached. */
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extern char *getusershell (void);
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/* Rewind to pointer that is advanced at each getusershell() call. */
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extern void setusershell (void);
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/* Free the pointer that is advanced at each getusershell() call and
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associated resources. */
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extern void endusershell (void);
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#elif defined GNULIB_POSIXCHECK
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# define getusershell() \
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(GL_LINK_WARNING ("getusershell is unportable - " \
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"use gnulib module getusershell for portability"), \
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# define setusershell() \
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(GL_LINK_WARNING ("setusershell is unportable - " \
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"use gnulib module getusershell for portability"), \
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# define endusershell() \
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(GL_LINK_WARNING ("endusershell is unportable - " \
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"use gnulib module getusershell for portability"), \
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# if @REPLACE_LCHOWN@
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/* Change the owner of FILE to UID (if UID is not -1) and the group of FILE
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to GID (if GID is not -1). Do not follow symbolic links.
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Return 0 if successful, otherwise -1 and errno set.
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See the POSIX:2001 specification
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<http://www.opengroup.org/susv3xsh/lchown.html>. */
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# define lchown rpl_lchown
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extern int lchown (char const *file, uid_t owner, gid_t group);
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#elif defined GNULIB_POSIXCHECK
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# define lchown(f,u,g) \
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(GL_LINK_WARNING ("lchown is unportable to pre-POSIX.1-2001 " \
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"systems - use gnulib module lchown for portability"), \
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/* Set the offset of FD relative to SEEK_SET, SEEK_CUR, or SEEK_END.
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Return the new offset if successful, otherwise -1 and errno set.
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See the POSIX:2001 specification
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<http://www.opengroup.org/susv3xsh/lseek.html>. */
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# define lseek rpl_lseek
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extern off_t lseek (int fd, off_t offset, int whence);
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#elif defined GNULIB_POSIXCHECK
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# define lseek(f,o,w) \
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(GL_LINK_WARNING ("lseek does not fail with ESPIPE on pipes on some " \
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"systems - use gnulib module lseek for portability"), \
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#if @GNULIB_READLINK@
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/* Read the contents of the symbolic link FILE and place the first BUFSIZE
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bytes of it into BUF. Return the number of bytes placed into BUF if
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successful, otherwise -1 and errno set.
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See the POSIX:2001 specification
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<http://www.opengroup.org/susv3xsh/readlink.html>. */
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# if !@HAVE_READLINK@
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extern int readlink (const char *file, char *buf, size_t bufsize);
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#elif defined GNULIB_POSIXCHECK
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# define readlink(f,b,s) \
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(GL_LINK_WARNING ("readlink is unportable - " \
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"use gnulib module readlink for portability"), \
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/* Pause the execution of the current thread for N seconds.
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Returns the number of seconds left to sleep.
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See the POSIX:2001 specification
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<http://www.opengroup.org/susv3xsh/sleep.html>. */
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extern unsigned int sleep (unsigned int n);
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#elif defined GNULIB_POSIXCHECK
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(GL_LINK_WARNING ("sleep is unportable - " \
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"use gnulib module sleep for portability"), \
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#if @GNULIB_WRITE@ && @REPLACE_WRITE@ && @GNULIB_UNISTD_H_SIGPIPE@
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/* Write up to COUNT bytes starting at BUF to file descriptor FD.
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See the POSIX:2001 specification
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<http://www.opengroup.org/susv3xsh/write.html>. */
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# define write rpl_write
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extern ssize_t write (int fd, const void *buf, size_t count);
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#ifdef FCHDIR_REPLACEMENT
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/* gnulib internal function. */
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extern void _gl_unregister_fd (int fd);
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#endif /* _GL_UNISTD_H */
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#endif /* _GL_UNISTD_H */
added
removed
gnulib/unistd.in.h
