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Reviewed by: bde

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Changes to support building with _POSIX_SOURCE set to 199309L:

1. Add sys/_posix.h to handle those preprocessor defs that POSIX
says have effects when defined before including any header files;

2. Change POSIX4_VISIBLE back to _POSIX4_VISIBLE

3. Add _POSIX4_VISIBLE_HISTORICALLY for pre-existing BSD features now
defined in POSIX.  These show up when:

_POSIX_SOURCE and _POSIX_C_SOURCE are not set or
_POSIX_C_SOURCE is set >= 199309L

and vanish when:

_POSIX_SOURCE is set or _POSIX_C_SOURCE is < 199309L.

4. Explain these in man 9 posix4;

5. Include _posix.h and conditionalize on new feature test.
This commit is contained in:
Peter Dufault 1998-03-08 17:25:38 +00:00
parent aac18d035f
commit aac4ad2c99
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=34319
15 changed files with 199 additions and 160 deletions
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14
include/limits.h
View File

@ -31,11 +31,12 @@
* SUCH DAMAGE.
*
* @(#)limits.h 8.2 (Berkeley) 1/4/94
* $Id: limits.h,v 1.5 1997/12/27 22:56:41 steve Exp $
* $Id: limits.h,v 1.6 1998/03/04 10:23:24 dufault Exp $
*/
#ifndef _LIMITS_H_
#define _LIMITS_H_
#include <sys/_posix.h>
#ifndef _ANSI_SOURCE
#define _POSIX_ARG_MAX 4096
@ -61,14 +62,15 @@
#define _POSIX2_LINE_MAX 2048
#define _POSIX2_RE_DUP_MAX 255
#ifdef POSIX4_VISIBLE
#define _POSIX_AIO_LISTIO_MAX 2
#ifdef _POSIX4_VISIBLE
#define _POSIX_AIO_LISTIO_MAX 16
#define _POSIX_AIO_MAX 1
#define _POSIX_DELAYTIMER_MAX 32
#define _POSIX_MQ_OPEN_MAX 8
#define _POSIX_MQ_PRIO_MAX 32
#define _POSIX_RTSIG_MAX 8
#define _POSIX_RTSIG_MAX 0
#define _POSIX_SEM_NSEMS_MAX 256
#define _POSIX_SEM_VALUE_MAX 32767
#define _POSIX_SIGQUEUE_MAX 32
@ -76,6 +78,10 @@
#endif
#ifdef _POSIX4_VISIBLE_HISTORICALLY
#define AIO_LISTIO_MAX 16
#endif
#endif /* !_ANSI_SOURCE */
#if !defined(_ANSI_SOURCE) && !defined(_POSIX_SOURCE) || defined(_XOPEN_SOURCE)

36
include/signal.h
View File

@ -39,6 +39,7 @@
#include <sys/cdefs.h>
#include <sys/signal.h>
#include <machine/ansi.h>
#include <sys/_posix.h>
#if !defined(_ANSI_SOURCE) && !defined(_POSIX_SOURCE)
extern __const char *__const sys_signame[NSIG];
@ -63,10 +64,39 @@ int signanosleep __P((const struct timespec *, struct timespec *,
int sigpending __P((sigset_t *));
int sigprocmask __P((int, const sigset_t *, sigset_t *));
int sigsuspend __P((const sigset_t *));
#ifdef POSIX4_VISIBLE
#ifdef _POSIX4_VISIBLE_HISTORICALLY
/* Async event notification */
union sigval {
int sival_int;
void *sival_ptr;
};
struct sigevent {
int sigev_notify; /* Notification type */
int sigev_signo; /* Signal number */
union sigval sigev_value; /* Signal value */
};
#define SIGEV_NONE 0 /* No async notification */
#define SIGEV_SIGNAL 1 /* Queue signal with value */
#endif /* _POSIX4_VISIBLE_HISTORICALLY */
#ifdef _POSIX4_VISIBLE
typedef struct siginfo {
int si_signo; /* Signal number */
int si_code; /* Cause of the signal */
union sigval si_value; /* Signal value */
} siginfo_t;
__BEGIN_DECLS
int sigqueue __P((_BSD_PID_T_, int, const union sigval));
int sigtimedwait __P((const sig_set_t *, siginfo_t *));
int sigwaitinfo __P((const sig_set_t *, siginfo_t *));
int sigtimedwait __P((const sigset_t *, siginfo_t *));
int sigwaitinfo __P((const sigset_t *, siginfo_t *));
__END_DECLS
#endif
#ifndef _POSIX_SOURCE
int killpg __P((_BSD_PID_T_, int));

4
lib/libc/gen/sysconf.c
View File

@ -176,7 +176,7 @@ sysconf(name)
mib[1] = USER_POSIX2_UPE;
goto yesno;
#ifdef POSIX4
#if _POSIX_VERSION >= 199309L
/* POSIX.4 */
case _SC_ASYNCHRONOUS_IO:
@ -279,7 +279,7 @@ sysconf(name)
mib[0] = CTL_POSIX4;
mib[1] = CTL_POSIX4_TIMER_MAX;
goto yesno;
#endif /* POSIX4 */
#endif /* _POSIX_VERSION >= 199309L */
yesno: if (sysctl(mib, 2, &value, &len, NULL, 0) == -1)
return (-1);

67
share/man/man9/posix4.9
View File

@ -22,7 +22,7 @@
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
.\" SUCH DAMAGE.
.\"
.\" $Id: posix4.9,v 1.8 1998/01/02 19:22:52 alex Exp $
.\" $Id: posix4.9,v 1.1 1998/03/04 10:23:50 dufault Exp $
.Dd March 1, 1998
.Dt POSIX.4 9
.Os FreeBSD 3.0
@ -32,17 +32,21 @@
.Sh DESCRIPTION
POSIX.4 adds real time extensions and some commonly used
Berkeley extensions to POSIX.1
This section contains information about the the
POSIX.4 extensions to the system.
This section contains preliminary information about avoiding conflicts
and adding support for the required ability to specify the interface
version.
.Sh STATUS
March 1, 1998 adds the header file changes to 3.0. There should be no
visible differences as long as _POSIX_VERSION is left at 199009L and
no one builds kernels with a POSIX4 option.
March 7, 1998: adding header file changes to 3.0. There should be no
visible differences as long as _POSIX_VERSION is left undefined.
Defining _POSIX_VERSION, even to the current value of 199009L, will
change the behavior of the system per the POSIX spec: if you define
_POSIX_VERSION to be 199009L then any extensions
already added to the system (for example,
John Dyson's aio work) may no longer be visible - this is happening
slowly.
.Pp
If you are working with something defined in POSIX.4 then there is a good
chance we conflict. If you have the time then set
_POSIX_VERSION to 199309L in /etc/make.conf and see that your work
fits with mine.
In spite of what I said at first, don't set _POSIX_VERSION into the
future until I say it is working.
.Pp
Since this only brings in the headers I'm only explaining the feature
test options.
@ -70,37 +74,46 @@ in the name space, i.e., if _POSIX_VERSION is 199309L (POSIX.4) but
_POSIX_C_SOURCE is 199009L (POSIX.1) then only POSIX.1 features should
appear.
.Sh PROPERLY HIDING EXTENSIONS
The following test macros are set up in <sys/_posix.h>. They should
used by system header files to avoid the kind of tests you see in
<sys/_posix.h>. Source programs should not use these FreeBSD specific
implementation details and should test _POSIX_VERSION.
These should not be used in the kernel either - the kernel should be
immune to the user land setting of _POSIX_VERSION. The POSIX4 option can
be used in the kernel to limit inclusion of new code, but make sure
things work properly when a POSIX.4 program is run on a kernel without
the POSIX4 option.
.Bd -literal -offset 0i
POSIX4_VISIBLE
_POSIX4_VISIBLE
.Ed
is a test macro that tries to sort out when extensions should be
visible.
is a test macro that sorts out when extensions should be
visible. It is defined in <sys/_posix.h>.
.Pp
In normal C program development
only _POSIX_VERSION is set, permitting BSD extensions to
appear to the programs. However, when adding new functionality mandated
by POSIX.4, it
is important to satisfy the requirements added by the
new _POSIX_C_SOURCE macro. POSIX4_VISIBLE (not a standard feature test macro)
new _POSIX_C_SOURCE macro. _POSIX4_VISIBLE (not a standard feature test macro)
is defined in sys/unistd.h when the combination of _POSIX_VERSION,
_POSIX_SOURCE, and _POSIX_C_SOURCE indicate the extensions are in scope.
_POSIX_SOURCE, and _POSIX_C_SOURCE indicate that the extensions are in scope.
.Bd -literal -offset 0i
_POSIX4_VISIBLE_HISTORICALLY
is present to conditionalize POSIX.4 extensions that were historically
in the system. These are visible when _POSIX_SOURCE and _POSIX_C_SOURCE
are not set at all or when _POSIX_C_SOURCE enables POSIX.4 features.
.Pp
Since for POSIX to work you must include <unistd.h> which ultimately
sets this up header files can always assume this is visible without
including anything.
Some of these are new enough that they should be changed to
be dependent on _POSIX4_VISIBLE instead.
.Pp
Some traditional BSD headers (e.g., mmap.h) are now specified in POSIX.4.
This means that functionality not present in POSIX.4 should now be
hidden by testing _POSIX_SOURCE or _POSIX_C_SOURCE. The safest thing
is to hide them when _POSIX_C_SOURCE is defined and less than 199309L.
Don't bracket the extensions with the POSIX.4 feature test macros.
For example, don't conditionalize new memory locking flags with
_POSIX_MEMLOCK. It will be too easy for conflicting implementations
that don't pay heed to the POSIX.4 flags to sneak into the system.
Traditional BSD headers (e.g., mmap.h) that are now specified
in POSIX.4 should include <sys/_posix.h> and conditionalize
BSD extensions on _POSIX4_VISIBLE_HISTORICALLY.
.Sh NON STANDARD TEST MACROS
.Bd -literal -offset 0i
POSIX4_INCLUDE_MAYBES
_POSIX4_INCLUDE_MAYBES
.Ed
when set before the inclusion of any other header file
requests that all header files that the POSIX.4 spec says a standard
header may include should be included. Normally no non-required
headers are included. Setting this pre-processor definition should

10
sys/posix4/aio.h
View File

@ -31,15 +31,15 @@
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $Id:$
* $Id: aio.h,v 1.1 1998/03/04 10:26:10 dufault Exp $
*/
/* aio.h: P1003.1B-1993 Asynchronous I/O */
#ifndef _POSIX4_AIO_H_
#define _POSIX4_AIO_H_
#ifndef _AIO_H_
#define _AIO_H_
#ifdef POSIX4_INCLUDE_MAYBES
#ifdef _POSIX4_INCLUDE_MAYBES
#include <sys/types.h>
#include <signal.h>
#include <time.h>
@ -87,6 +87,7 @@ struct aiocb {
#ifndef KERNEL
#include <sys/cdefs.h>
__BEGIN_DECLS
int aio_read __P((struct aiocb *));
int aio_write __P((struct aiocb *));
@ -101,6 +102,7 @@ int aio_suspend __P((caio_listio_ctl [_POSIX_AIO_LISTIO_MAX],
int, const struct timespec *));
int aio_fsync __P((int, struct aiocb *));
__END_DECLS
#endif /* KERNEL */

5
sys/posix4/mqueue.h
View File

@ -36,7 +36,7 @@
*
*/
#ifdef POSIX4_INCLUDE_MAYBES
#ifdef _POSIX4_INCLUDE_MAYBES
#include <sys/types.h>
#include <fcntl.h>
#include <time.h>
@ -55,8 +55,10 @@ struct mq_attr {
};
#ifndef KERNEL
#include <sys/cdefs.h>
__BEGIN_DECLS
mqd_t mq_open __P((const char *, int oflag, ...));
int mq_close __P((mqd_t));
int mq_unlink __P((const char *));
@ -65,6 +67,7 @@ ssize_t mq_receive __P((mqd_t, char *, size_t, unsigned int *));
int mq_notify __P((mqd_t, const struct sigevent *));
int mq_setattr __P((mqd_t, const struct mq_attr *, struct mq_attr *));
int mq_getattr __P((mqd_t, struct mq_attr *));
__END_DECLS
#endif /* KERNEL */

18
sys/posix4/posix4.h
View File

@ -33,22 +33,14 @@
*
*/
#if defined(_POSIX_VERSION) && _POSIX_VERSION >= 199309L
#include <sys/_posix.h>
#ifdef _POSIX4_VISIBLE
#include <sys/param.h>
#include <sys/ioccom.h>
#include <sched.h>
/*
* This defines POSIX4_VISIBLE to indicate posix4 extensions should show up.
* You should test this when you add a posix4 extension to a header
* that exists in POSIX.1. Try "man 9 posix4".
*/
#if !defined(_POSIX_C_SOURCE) || \
defined(_POSIX_C_SOURCE) && _POSIX_C_SOURCE >= 199309L
#define POSIX4_VISIBLE
#endif
/*
*
* March 1, 1998: Details from here on change and this header file
@ -296,5 +288,5 @@ int kmunlock(int *, void *, const void *, size_t );
{ "timer_max", CTLTYPE_INT }, \
}
#endif /* _POSIX_VERSION >= 199309L */
#endif /* _POSIX4_VISIBLE */
#endif /* _POSIX4_POSIX4_H_ */

4
sys/posix4/semaphore.h
View File

@ -36,7 +36,7 @@
*
*/
#ifdef POSIX4_INCLUDE_MAYBES
#ifdef _POSIX4_INCLUDE_MAYBES
#include <sys/types.h>
#include <fcntl.h>
#endif
@ -46,6 +46,7 @@ typedef int sem_t;
#ifndef KERNEL
#include <sys/cdefs.h>
__BEGIN_DECLS
int sem_init __P(sem_t *, int, unsigned int));
int sem_destroy __P((sem_t *));
sem_t sem_open __P((const char *, int, ...));
@ -55,6 +56,7 @@ int sem_wait((sem_t *));
int sem_trywait((sem_t *));
int sem_post((sem_t *));
int sem_getvalue((sem_t *, int *));
__END_DECLS
#endif /* KERNEL */

73
sys/sys/_posix.h Normal file
View File

@ -0,0 +1,73 @@
#ifndef _SYS__POSIX_H_
#define _SYS__POSIX_H_
/*-
* Copyright (c) 1998 HD Associates, Inc.
* All rights reserved.
* contact: dufault@hda.com
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
*
* $Id: $
*/
/*
* This is a stand alone header file to set up for feature specification
* defined to take place before the inclusion of any standard header.
* It should only handle pre-processor defines.
*
* See section B.2.7 of 1003.1b-1993
*
*/
#ifndef _POSIX_VERSION
#define _POSIX_VERSION 199009L
#endif
/* Test for visibility of pre-existing POSIX.4 features that should really
* be conditional. If _POSIX_C_SOURCE and _POSIX_SOURCE are not
* defined then permit the pre-existing features to show up:
*/
#if !defined(_POSIX_SOURCE) && !defined(_POSIX_C_SOURCE)
#define _POSIX4_VISIBLE_HISTORICALLY
#endif
/* Test for visibility of additional POSIX.4 features:
*/
#if _POSIX_VERSION >= 199309L && \
(!defined(_POSIX_C_SOURCE) || _POSIX_C_SOURCE >= 199309L)
#define _POSIX4_VISIBLE
#define _POSIX4_VISIBLE_HISTORICALLY
#endif
/* I'm not sure if I'm allowed to do this, but at least initially
* it may catch some teething problems:
*/
#if defined(_POSIX_C_SOURCE) && (_POSIX_C_SOURCE > _POSIX_VERSION)
#error _POSIX_C_SOURCE > _POSIX_VERSION
#endif
#define POSIX4_VISIBLE You missed the leading _!!
#define POSIX4_VISIBLE_FORCEABLY You left the old define in the code!!
#endif /* _SYS__POSIX_H_ */

36
sys/sys/aio.h
View File

@ -16,40 +16,11 @@
* bad that happens because of using this software isn't the responsibility
* of the author. This software is distributed AS-IS.
*
* $Id: aio.h,v 1.2 1997/07/17 04:49:43 dyson Exp $
* $Id: aio.h,v 1.3 1997/12/08 02:18:14 dyson Exp $
*/
#include <sys/types.h>
/**************************************************************************/
/* Additions to signal.h -- hack alert. */
/**************************************************************************/
/*
* sigval structure:
*/
union sigval {
int sival_int;
void *sival_ptr;
};
/*
* this is the sigevent structure:
*/
struct sigevent {
int sigev_notify; /* Notification */
int sigev_signo; /* Signal number */
union sigval sigev_value; /* Not used yet in FreeBSD */
};
/*
* values for sigev_notify:
*/
#define SIGEV_NONE 0 /* Don't post a signal */
#define SIGEV_SIGNAL 1 /* Post specified signal */
/**************************************************************************/
/* Actual AIO header */
/**************************************************************************/
/*
* Returned by aio_cancel:
* (Note that FreeBSD's aio is not cancellable -- yet.)
@ -71,11 +42,6 @@ struct sigevent {
#define LIO_NOWAIT 0x0
#define LIO_WAIT 0x1
/*
* Maximum number of allowed LIO operations
*/
#define AIO_LISTIO_MAX 16
/*
* Private mode bit for aio.
* (This bit is set by the library routine

12
sys/sys/mman.h
View File

@ -31,12 +31,14 @@
* SUCH DAMAGE.
*
* @(#)mman.h 8.2 (Berkeley) 1/9/95
* $Id: mman.h,v 1.20 1997/12/31 01:22:00 alex Exp $
* $Id: mman.h,v 1.21 1998/03/04 10:26:35 dufault Exp $
*/
#ifndef _SYS_MMAN_H_
#define _SYS_MMAN_H_
#include <sys/_posix.h>
/*
* Protections are chosen from these bits, or-ed together
*/
@ -63,14 +65,14 @@
#define MAP_NOEXTEND 0x0100 /* for MAP_FILE, don't change file size */
#define MAP_HASSEMAPHORE 0x0200 /* region may contain semaphores */
#ifdef POSIX4_VISIBLE
#ifdef _POSIX4_VISIBLE
/*
* Process memory locking
*/
#define MCL_CURRENT 0x0001 /* Lock only current memory */
#define MCL_FUTURE 0x0002 /* Lock all future memory as well */
#endif /* POSIX4_VISIBLE */
#endif /* _POSIX4_VISIBLE */
/*
* Error return from mmap()
@ -115,12 +117,12 @@
#include <sys/cdefs.h>
__BEGIN_DECLS
#ifdef POSIX4_VISIBLE
#ifdef _POSIX4_VISIBLE
int mlockall __P((int));
int munlockall __P((void));
int shm_open __P((const char *, int, mode_t));
int shm_unlink __P((const char *));
#endif /* POSIX4_VISIBLE */
#endif /* _POSIX4_VISIBLE */
int mlock __P((const void *, size_t));
#ifndef _MMAP_DECLARED
#define _MMAP_DECLARED

18
sys/sys/posix4.h
View File

@ -33,22 +33,14 @@
*
*/
#if defined(_POSIX_VERSION) && _POSIX_VERSION >= 199309L
#include <sys/_posix.h>
#ifdef _POSIX4_VISIBLE
#include <sys/param.h>
#include <sys/ioccom.h>
#include <sched.h>
/*
* This defines POSIX4_VISIBLE to indicate posix4 extensions should show up.
* You should test this when you add a posix4 extension to a header
* that exists in POSIX.1. Try "man 9 posix4".
*/
#if !defined(_POSIX_C_SOURCE) || \
defined(_POSIX_C_SOURCE) && _POSIX_C_SOURCE >= 199309L
#define POSIX4_VISIBLE
#endif
/*
*
* March 1, 1998: Details from here on change and this header file
@ -296,5 +288,5 @@ int kmunlock(int *, void *, const void *, size_t );
{ "timer_max", CTLTYPE_INT }, \
}
#endif /* _POSIX_VERSION >= 199309L */
#endif /* _POSIX4_VISIBLE */
#endif /* _POSIX4_POSIX4_H_ */

13
sys/sys/rtprio.h
View File

@ -28,7 +28,7 @@
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $Id: rtprio.h,v 1.4 1997/02/22 09:45:48 peter Exp $
* $Id: rtprio.h,v 1.5 1998/03/04 10:26:39 dufault Exp $
*/
#ifndef _SYS_RTPRIO_H_
@ -44,23 +44,14 @@
#define RTP_PRIO_NORMAL 1
#define RTP_PRIO_IDLE 2
/* RTP_PRIO_FIFO is Posix 4 SCHED_FIFO.
* Careful: These are based on the kernel config POSIX4 and not
* the compile time test _POSIX_PRIORITY_SCHEDULING since they
* set the behavior of the system.
/* RTP_PRIO_FIFO is POSIX.4 SCHED_FIFO.
*/
#ifdef POSIX4
#define RTP_PRIO_FIFO_BIT 4
#define RTP_PRIO_FIFO (RTP_PRIO_REALTIME | RTP_PRIO_FIFO_BIT)
#define RTP_PRIO_BASE(P) ((P) & ~RTP_PRIO_FIFO_BIT)
#define RTP_PRIO_IS_REALTIME(P) (RTP_PRIO_BASE(P) == RTP_PRIO_REALTIME)
#define RTP_PRIO_NEED_RR(P) ((P) != RTP_PRIO_FIFO)
#else
#define RTP_PRIO_BASE(P) (P)
#define RTP_PRIO_IS_REALTIME(P) (P == RTP_PRIO_REALTIME)
#define RTP_PRIO_NEED_RR(P) (1)
#endif
/* priority range */
#define RTP_PRIO_MIN 0 /* Highest priority */

4
sys/sys/semaphore.h
View File

@ -36,7 +36,7 @@
*
*/
#ifdef POSIX4_INCLUDE_MAYBES
#ifdef _POSIX4_INCLUDE_MAYBES
#include <sys/types.h>
#include <fcntl.h>
#endif
@ -46,6 +46,7 @@ typedef int sem_t;
#ifndef KERNEL
#include <sys/cdefs.h>
__BEGIN_DECLS
int sem_init __P(sem_t *, int, unsigned int));
int sem_destroy __P((sem_t *));
sem_t sem_open __P((const char *, int, ...));
@ -55,6 +56,7 @@ int sem_wait((sem_t *));
int sem_trywait((sem_t *));
int sem_post((sem_t *));
int sem_getvalue((sem_t *, int *));
__END_DECLS
#endif /* KERNEL */

45
sys/sys/unistd.h
View File

@ -31,12 +31,14 @@
* SUCH DAMAGE.
*
* @(#)unistd.h 8.2 (Berkeley) 1/7/94
* $Id: unistd.h,v 1.14 1997/06/16 00:29:26 dyson Exp $
* $Id: unistd.h,v 1.15 1998/03/04 10:26:46 dufault Exp $
*/
#ifndef _SYS_UNISTD_H_
#define _SYS_UNISTD_H_
#include <sys/_posix.h>
/* compile-time symbolic constants */
#define _POSIX_JOB_CONTROL /* implementation supports job control */
@ -50,47 +52,10 @@
#define _POSIX_SAVED_IDS /* saved set-user-ID and set-group-ID */
#endif
#ifdef POSIX4
/* Select POSIX.4 regardless.
* Don't undef first - we want an error on conflicts.
*/
#define _POSIX_VERSION 199309L
#endif
#ifndef _POSIX_VERSION
#define _POSIX_VERSION 199009L
#endif
#if _POSIX_VERSION > 199009L
/*
* Set it up so that all new headers can assume _POSIX_C_SOURCE is the
* only thing that must be looked at to determine the feature set,
* and so that old headers don't have to change:
*/
#if defined(_POSIX_SOURCE) && !defined(_POSIX_C_SOURCE)
/*
* Default to latest:
*/
#define _POSIX_C_SOURCE _POSIX_VERSION
#endif
#if defined(_POSIX_C_SOURCE) && !defined(_POSIX_SOURCE)
/*
* Define _POSIX_SOURCE for older headers:
*/
#define _POSIX_SOURCE
#endif
#if _POSIX_VERSION >= 199309L
#include <posix4/posix4.h>
#endif
#endif /* _POSIX_VERSION */
#define _POSIX2_VERSION 199212L
/* execution-time symbolic constants */
@ -162,7 +127,7 @@
/* configurable system strings */
#define _CS_PATH 1
#ifdef POSIX4_VISIBLE
#ifdef _POSIX4_VISIBLE
#if 0
/* Not until the dust settles after the header commit
@ -205,7 +170,7 @@
#define _PC_PRIO_IO 54
#define _PC_SYNC_IO 55
#endif /* POSIX4_VISIBLE */
#endif /* _POSIX4_VISIBLE */
#ifndef _POSIX_SOURCE
/*