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NetBSD/include/unistd.h
bjh21 4be7a2dcf3 Add a new feature-test macro, _NETBSD_SOURCE. If this is defined 
by the application, all NetBSD interfaces are made visible, even
if some other feature-test macro (like _POSIX_C_SOURCE) is defined.
<sys/featuretest.h> defined _NETBSD_SOURCE if none of _ANSI_SOURCE,
_POSIX_C_SOURCE and _XOPEN_SOURCE is defined, so as to preserve
existing behaviour.

This has two major advantages:
+ Programs that require non-POSIX facilities but define _POSIX_C_SOURCE
  can trivially be overruled by putting -D_NETBSD_SOURCE in their CFLAGS.
+ It makes most of the #ifs simpler, in that they're all now ORs of the
  various macros, rather than having checks for (!defined(_ANSI_SOURCE) ||
  !defined(_POSIX_C_SOURCE) || !defined(_XOPEN_SOURCE)) all over the place.

I've tried not to change the semantics of the headers in any case where
_NETBSD_SOURCE wasn't defined, but there were some places where the
current semantics were clearly mad, and retaining them was harder than
correcting them.  In particular, I've mostly normalised things so that
_ANSI_SOURCE gets you the smallest set of stuff, then _POSIX_C_SOURCE,
_XOPEN_SOURCE and _NETBSD_SOURCE in that order.

Tested by building for vax, encouraged by thorpej, and uncontested in
tech-userlevel for a week.
2003-04-28 23:16:11 +00:00

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/* $NetBSD: unistd.h,v 1.92 2003/04/28 23:16:15 bjh21 Exp $ */
/*-
* Copyright (c) 1998, 1999 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Klaus Klein.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the NetBSD
* Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
/*
* Copyright (c) 1991, 1993, 1994
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)unistd.h 8.12 (Berkeley) 4/27/95
*/
#ifndef _UNISTD_H_
#define _UNISTD_H_
#include <machine/ansi.h>
#include <machine/int_types.h>
#include <sys/cdefs.h>
#include <sys/featuretest.h>
#include <sys/types.h>
#include <sys/unistd.h>
/*
* IEEE Std 1003.1-90
*/
#define STDIN_FILENO 0 /* standard input file descriptor */
#define STDOUT_FILENO 1 /* standard output file descriptor */
#define STDERR_FILENO 2 /* standard error file descriptor */
#include <sys/null.h>
__BEGIN_DECLS
__dead void _exit __P((int)) __attribute__((__noreturn__));
int access __P((const char *, int));
unsigned int alarm __P((unsigned int));
int chdir __P((const char *));
#if defined(_POSIX_C_SOURCE) || defined(_XOPEN_SOURCE)
int chown __P((const char *, uid_t, gid_t)) __RENAME(__posix_chown);
#else
int chown __P((const char *, uid_t, gid_t));
#endif /* defined(_POSIX_C_SOURCE) || defined(_XOPEN_SOURCE) */
int close __P((int));
size_t confstr __P((int, char *, size_t));
#ifndef __CUSERID_DECLARED
#define __CUSERID_DECLARED
/* also declared in stdio.h */
char *cuserid __P((char *)); /* obsolete */
#endif /* __CUSERID_DECLARED */
int dup __P((int));
int dup2 __P((int, int));
int execl __P((const char *, const char *, ...));
int execle __P((const char *, const char *, ...));
int execlp __P((const char *, const char *, ...));
int execv __P((const char *, char * const *));
int execve __P((const char *, char * const *, char * const *));
int execvp __P((const char *, char * const *));
pid_t fork __P((void));
long fpathconf __P((int, int));
char *getcwd __P((char *, size_t));
gid_t getegid __P((void));
uid_t geteuid __P((void));
gid_t getgid __P((void));
int getgroups __P((int, gid_t []));
__aconst char *getlogin __P((void));
pid_t getpgrp __P((void));
pid_t getpid __P((void));
pid_t getppid __P((void));
uid_t getuid __P((void));
int isatty __P((int));
int link __P((const char *, const char *));
long pathconf __P((const char *, int));
int pause __P((void));
int pipe __P((int *));
ssize_t read __P((int, void *, size_t));
int rmdir __P((const char *));
int setgid __P((gid_t));
int setpgid __P((pid_t, pid_t));
pid_t setsid __P((void));
int setuid __P((uid_t));
unsigned int sleep __P((unsigned int));
long sysconf __P((int));
pid_t tcgetpgrp __P((int));
int tcsetpgrp __P((int, pid_t));
__aconst char *ttyname __P((int));
int unlink __P((const char *));
ssize_t write __P((int, const void *, size_t));
/*
* IEEE Std 1003.2-92, adopted in X/Open Portability Guide Issue 4 and later
*/
#if (_POSIX_C_SOURCE - 0) >= 2 || (_XOPEN_SOURCE - 0) >= 4 || \
defined(_NETBSD_SOURCE)
int getopt __P((int, char * const [], const char *));
extern char *optarg; /* getopt(3) external variables */
extern int opterr;
extern int optind;
extern int optopt;
#endif
/*
* The Open Group Base Specifications, Issue 6; IEEE Std 1003.1-2001 (POSIX)
*/
#if (_POSIX_C_SOURCE - 0) >= 200112L || (_XOPEN_SOURCE - 0) >= 600 || \
defined(_NETBSD_SOURCE)
int setegid __P((gid_t));
int seteuid __P((uid_t));
#endif
/*
* The following three syscalls are also defined in <sys/types.h>
* We protect them against double declarations.
*/
#ifndef __OFF_T_SYSCALLS_DECLARED
#define __OFF_T_SYSCALLS_DECLARED
off_t lseek __P((int, off_t, int));
int truncate __P((const char *, off_t));
/*
* IEEE Std 1003.1b-93,
* also found in X/Open Portability Guide >= Issue 4 Verion 2
*/
#if (_POSIX_C_SOURCE - 0) >= 199309L || \
(defined(_XOPEN_SOURCE) && defined(_XOPEN_SOURCE_EXTENDED)) || \
(_XOPEN_SOURCE - 0) >= 500 || defined(_NETBSD_SOURCE)
int ftruncate __P((int, off_t));
#endif
#endif /* __OFF_T_SYSCALLS_DECLARED */
/*
* IEEE Std 1003.1b-93, adopted in X/Open CAE Specification Issue 5 Version 2
*/
#if (_POSIX_C_SOURCE - 0) >= 199309L || (_XOPEN_SOURCE - 0) >= 500 || \
defined(_NETBSD_SOURCE)
int fdatasync __P((int));
int fsync __P((int));
#endif
/*
* X/Open Portability Guide, all issues
*/
#if defined(_XOPEN_SOURCE) || defined(_NETBSD_SOURCE)
int chroot __P((const char *));
int nice __P((int));
#endif
/*
* X/Open Portability Guide <= Issue 3
*/
#if defined(_XOPEN_SOURCE) && (_XOPEN_SOURCE - 0) <= 3
int rename __P((const char *, const char *)) __RENAME(__posix_rename);
#endif
/*
* X/Open Portability Guide >= Issue 4
*/
#if (_XOPEN_SOURCE - 0) >= 4 || defined(_NETBSD_SOURCE)
__aconst char *crypt __P((const char *, const char *));
int encrypt __P((char *, int));
char *getpass __P((const char *));
pid_t getsid __P((pid_t));
#endif
/*
* X/Open Portability Guide >= Issue 4 Version 2
*/
#if (defined(_XOPEN_SOURCE) && defined(_XOPEN_SOURCE_EXTENDED)) || \
(_XOPEN_SOURCE - 0) >= 500 || defined(_NETBSD_SOURCE)
#ifndef intptr_t
typedef __intptr_t intptr_t;
#define intptr_t __intptr_t
#endif
#define F_ULOCK 0
#define F_LOCK 1
#define F_TLOCK 2
#define F_TEST 3
int brk __P((void *));
int fchdir __P((int));
#if defined(_XOPEN_SOURCE)
int fchown __P((int, uid_t, gid_t)) __RENAME(__posix_fchown);
#else
int fchown __P((int, uid_t, gid_t));
#endif
int getdtablesize __P((void));
long gethostid __P((void));
int gethostname __P((char *, size_t));
__pure int
getpagesize __P((void)); /* legacy */
pid_t getpgid __P((pid_t));
#if defined(_XOPEN_SOURCE)
int lchown __P((const char *, uid_t, gid_t)) __RENAME(__posix_lchown);
#else
int lchown __P((const char *, uid_t, gid_t));
#endif
int lockf __P((int, int, off_t));
int readlink __P((const char *, char *, size_t));
void *sbrk __P((intptr_t));
/* XXX prototype wrong! */
int setpgrp __P((pid_t pid, pid_t pgrp)); /* obsoleted by setpgid() */
int setregid __P((gid_t, gid_t));
int setreuid __P((uid_t, uid_t));
void swab __P((const void *, void *, size_t));
int symlink __P((const char *, const char *));
void sync __P((void));
useconds_t ualarm __P((useconds_t, useconds_t));
int usleep __P((useconds_t));
#ifdef __LIBC12_SOURCE__
pid_t vfork __P((void));
pid_t __vfork14 __P((void));
#else
pid_t vfork __P((void)) __RENAME(__vfork14);
#endif
#ifndef __AUDIT__
char *getwd __P((char *)); /* obsoleted by getcwd() */
#endif
/* FIXME: this should go to <sys/time.h>! */
#if __STDC__
struct timeval; /* select(2) XXX */
#endif
int select __P((int, fd_set *, fd_set *, fd_set *, struct timeval *));
#endif /* _XOPEN_SOURCE_EXTENDED || _XOPEN_SOURCE >= 500 || _NETBSD_SOURCE */
/*
* X/Open CAE Specification Issue 5 Version 2
*/
#if (_XOPEN_SOURCE - 0) >= 500 || defined(_NETBSD_SOURCE)
ssize_t pread __P((int, void *, size_t, off_t));
ssize_t pwrite __P((int, const void *, size_t, off_t));
#endif
/*
* Implementation-defined extensions
*/
#if defined(_NETBSD_SOURCE)
int acct __P((const char *));
int des_cipher __P((const char *, char *, long, int));
int des_setkey __P((const char *));
void endusershell __P((void));
int exect __P((const char *, char * const *, char * const *));
int fchroot __P((int));
int getdomainname __P((char *, size_t));
int getgrouplist __P((const char *, gid_t, gid_t *, int *));
mode_t getmode __P((const void *, mode_t));
int getsubopt __P((char **, char * const *, char **));
__aconst char *getusershell __P((void));
int initgroups __P((const char *, gid_t));
int iruserok __P((u_int32_t, int, const char *, const char *));
int issetugid __P((void));
int nfssvc __P((int, void *));
int profil __P((char *, size_t, u_long, u_int));
#ifndef __PSIGNAL_DECLARED
#define __PSIGNAL_DECLARED
/* also in signal.h */
void psignal __P((unsigned int, const char *));
#endif /* __PSIGNAL_DECLARED */
int rcmd __P((char **, int, const char *,
const char *, const char *, int *));
int reboot __P((int, char *));
int revoke __P((const char *));
int rresvport __P((int *));
int ruserok __P((const char *, int, const char *, const char *));
int setdomainname __P((const char *, size_t));
int setgroups __P((int, const gid_t *));
int sethostid __P((long));
int sethostname __P((const char *, size_t));
int setlogin __P((const char *));
void *setmode __P((const char *));
int setrgid __P((gid_t));
int setruid __P((uid_t));
void setusershell __P((void));
void strmode __P((mode_t, char *));
__aconst char *strsignal __P((int));
int swapctl __P((int, const void *, int));
int swapon __P((const char *)); /* obsoleted by swapctl() */
int syscall __P((int, ...));
quad_t __syscall __P((quad_t, ...));
int undelete __P((const char *));
#if 1 /*INET6*/
int rcmd_af __P((char **, int, const char *,
const char *, const char *, int *, int));
int rresvport_af __P((int *, int));
int iruserok_sa __P((const void *, int, int, const char *, const char *));
#endif
#ifndef __SYS_SIGLIST_DECLARED
#define __SYS_SIGLIST_DECLARED
/* also in signal.h */
extern __const char *__const *sys_siglist __RENAME(__sys_siglist14);
#endif /* __SYS_SIGLIST_DECLARED */
extern int optreset; /* getopt(3) external variable */
extern char *suboptarg; /* getsubopt(3) external variable */
#endif
__END_DECLS
#endif /* !_UNISTD_H_ */
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