Reviewed by: msmith, bde long ago

POSIX.4 headers and sysctl variables.  Nothing should change
unless POSIX4 is defined or _POSIX_VERSION is set to 199309.

7 files changed, 942 insertions, 0 deletions

diff --git a/sys/posix4/aio.h b/sys/posix4/aio.h
new file mode 100644
index 0000000..6cd47bc
--- /dev/null
+++ b/sys/posix4/aio.h
@@ -0,0 +1,107 @@
+/* XXX Conflicts with John's - not installed.
+ */
+/*-
+ * Copyright (c) 1996, 1997
+ *	HD Associates, Inc.  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 HD Associates, Inc
+ * 4. Neither the name of the author nor the names of any co-contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY HD ASSOCIATES 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 HD ASSOCIATES 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.
+ *
+ * $Id:$
+ */
+
+/* aio.h: P1003.1B-1993 Asynchronous I/O */
+
+#ifndef _POSIX4_AIO_H_
+#define _POSIX4_AIO_H_
+
+#ifdef POSIX4_INCLUDE_MAYBES
+#include <sys/types.h>
+#include <signal.h>
+#include <time.h>
+#include <fcntl.h>
+#else
+struct timespec;
+#include <sys/types.h>
+#ifdef KERNEL
+#include <sys/signal.h>
+#else
+#include <signal.h>
+#endif
+#endif
+
+/* Return values: */
+
+#define AIO_CANCELED		0x01	/* All operations cancelled */
+#define AIO_NOTCANCELLED	0x02	/* Some not cancelled */
+#define AIO_ALLDONE		0x04	/* None were cancelled */
+
+/* lio_listio synchronization options */
+
+#define LIO_WAIT		0x08	/* Suspend until complete */
+#define LIO_NOWAIT		0x10	/* Continue operation */
+
+/* lio_listio element operations */
+
+#define LIO_READ		0x20
+#define LIO_WRITE		0x40
+#define LIO_NOP			0x80
+
+typedef struct aiocb * const aio_listio_ctl;
+typedef const struct aiocb * const caio_listio_ctl;
+
+struct aiocb {
+	int		aio_fildes;	/* File descriptor */
+	off_t		aio_offset;	/* File offset */
+	volatile void *	aio_buf;	/* Location of buffer */
+	size_t		aio_nbytes;	/* Length of transfer */
+	int		aio_reqprio;	/* Request priority offset */
+	struct sigevent	aio_sigevent;	/* Signal number and value */
+	int		aio_lio_opcode;	/* Operation to be performed */
+};
+
+#ifndef KERNEL
+#include <sys/cdefs.h>
+
+int aio_read __P((struct aiocb *));
+int aio_write __P((struct aiocb *));
+
+int lio_listio __P((int, aio_listio_ctl [_POSIX_AIO_LISTIO_MAX],
+	int, struct sigevent *));
+
+int aio_error __P((const struct aiocb *));
+ssize_t aio_return __P((struct aiocb *));
+int aio_cancel __P((int, struct aiocb *));
+
+int aio_suspend __P((caio_listio_ctl [_POSIX_AIO_LISTIO_MAX],
+	int, const struct timespec *));
+
+int aio_fsync __P((int, struct aiocb *));
+
+#endif /* KERNEL */
+
+#endif /* _POSIX4_AIO_H_ */
diff --git a/sys/posix4/ksched.c b/sys/posix4/ksched.c
new file mode 100644
index 0000000..7ff85d6
--- /dev/null
+++ b/sys/posix4/ksched.c
@@ -0,0 +1,252 @@
+/*
+ * Copyright (c) 1996, 1997
+ *	HD Associates, Inc.  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 HD Associates, Inc
+ * 4. Neither the name of the author nor the names of any co-contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY HD ASSOCIATES 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 HD ASSOCIATES 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.
+ *
+ */
+
+/* ksched: Soft real time scheduling based on "rtprio".
+ */
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/proc.h>
+#include <sys/kernel.h>
+#include <machine/cpu.h>	/* For need_resched */
+#include <fcntl.h>
+
+#include <sys/posix4.h>
+
+/* ksched: Real-time extension to support POSIX priority scheduling.
+ */
+
+static struct timespec rr_interval;
+
+int ksched_attach(int p4_instance, int fac_code, void **p)
+{
+	rr_interval.tv_sec = 0;
+	rr_interval.tv_nsec = 1000000000L / roundrobin_interval();
+
+	*p = 0;
+
+	return 0;
+}
+
+int ksched_detach(void *p)
+{
+	return 0;
+}
+
+/*
+ * XXX About priorities
+ *
+ *	POSIX4 requires that numerically higher priorities be of
+ *	higher priority.  It also permits sched_setparam to be
+ *	implementation defined for SCHED_OTHER.  I don't like
+ *	the notion of inverted priorites for normal processes when
+ *  you can use "setpriority" for that.
+ *
+ *	I'm rejecting sched_setparam for SCHED_OTHER with EINVAL.
+ */
+
+/* Macros to convert between the unix (lower numerically is higher priority)
+ * and POSIX4 (higher numerically is higher priority)
+ */
+
+#define p4prio_to_rtpprio(P) (RTP_PRIO_MAX - (P))
+#define rtpprio_to_p4prio(P) (RTP_PRIO_MAX - (P))
+
+static inline int
+getscheduler(int *ret, void *hook, struct proc *p)
+{
+	int e = 0;
+
+	switch (p->p_rtprio.type)
+	{
+		case RTP_PRIO_FIFO:
+		*ret = SCHED_FIFO;
+		break;
+
+		case RTP_PRIO_REALTIME:
+		*ret = SCHED_RR;
+		break;
+
+		default:
+		*ret = SCHED_OTHER;
+		break;
+	}
+
+	return e;
+}
+
+int ksched_setparam(int *ret, void *hook,
+	struct proc *p, const struct sched_param *param)
+{
+	int e, policy;
+
+	e = getscheduler(&policy, hook, p);
+
+	if (e == 0)
+	{
+		if (policy == SCHED_OTHER)
+			e = EINVAL;
+		else
+			e = ksched_setscheduler(ret, hook, p, policy, param);
+	}
+
+	return e;
+}
+
+int ksched_getparam(int *ret, void *hook,
+	struct proc *p, struct sched_param *param)
+{
+	if (RTP_PRIO_IS_REALTIME(p->p_rtprio.type))
+		param->sched_priority = rtpprio_to_p4prio(p->p_rtprio.prio);
+
+	return 0;
+}
+
+/*
+ * XXX The priority and scheduler modifications should
+ *     be moved into published interfaces in kern/kern_sync.
+ *
+ * The permissions to modify process p were checked in "posix4proc()".
+ *
+ */
+int ksched_setscheduler(int *ret, void *hook,
+	struct proc *p, int policy, const struct sched_param *param)
+{
+	int e = 0;
+	struct rtprio rtp;
+
+	switch(policy)
+	{
+		case SCHED_RR:
+		case SCHED_FIFO:
+
+		if (param->sched_priority >= RTP_PRIO_MIN &&
+		param->sched_priority <= RTP_PRIO_MAX)
+		{
+			rtp.type = (policy == SCHED_FIFO)
+				? RTP_PRIO_FIFO : RTP_PRIO_REALTIME;
+
+			rtp.prio = p4prio_to_rtpprio(RTP_PRIO_MAX);
+			p->p_rtprio = rtp;
+			(void)resetpriority(p);
+		}
+		else
+			e = EPERM;
+
+
+		break;
+
+		case SCHED_OTHER:
+		{
+			rtp.type = RTP_PRIO_NORMAL;
+			rtp.prio = p4prio_to_rtpprio(RTP_PRIO_MIN);
+			p->p_rtprio = rtp;
+
+			/* XXX Simply revert to whatever we had for last
+			 *     normal scheduler priorities.
+			 *     This puts a requirement
+			 *     on the scheduling code: You must leave the
+			 *     scheduling info alone.
+			 */
+			(void)resetpriority(p);
+		}
+		break;
+	}
+
+	return e;
+}
+
+int ksched_getscheduler(int *ret, void *hook, struct proc *p)
+{
+	return getscheduler(ret, hook, p);
+}
+
+/* ksched_yield: Yield the CPU.
+ */
+int ksched_yield(int *ret, void *hook)
+{
+	need_resched();
+	return 0;
+}
+
+int ksched_get_priority_max(int *ret, void *hook, int policy)
+{
+	int e = 0;
+
+	switch (policy)
+	{
+		case SCHED_FIFO:
+		case SCHED_RR:
+		*ret = RTP_PRIO_MAX;
+		break;
+
+		case SCHED_OTHER:
+		*ret =  PRIO_MAX;
+		break;
+
+		default:
+		e = EINVAL;
+	}
+
+	return e;
+}
+
+int ksched_get_priority_min(int *ret, void *hook, int policy)
+{
+	int e = 0;
+
+	switch (policy)
+	{
+		case SCHED_FIFO:
+		case SCHED_RR:
+		*ret = RTP_PRIO_MIN;
+		break;
+
+		case SCHED_OTHER:
+		*ret =  PRIO_MIN;
+		break;
+
+		default:
+		e = EINVAL;
+	}
+
+	return e;
+}
+
+int ksched_rr_get_interval(int *ret, void *hook,
+	struct proc *p, struct timespec *timespec)
+{
+	*timespec = rr_interval;
+
+	return 0;
+}
diff --git a/sys/posix4/mqueue.h b/sys/posix4/mqueue.h
new file mode 100644
index 0000000..0872ddf
--- /dev/null
+++ b/sys/posix4/mqueue.h
@@ -0,0 +1,71 @@
+#ifndef _MQUEUE_H_
+#define _MQUEUE_H_
+
+/* mqueue.h: POSIX.4 Message Queues */
+
+/*-
+ * Copyright (c) 1996, 1997
+ *	HD Associates, Inc.  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 HD Associates, Inc
+ * 4. Neither the name of the author nor the names of any co-contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY HD ASSOCIATES 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 HD ASSOCIATES 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.
+ *
+ */
+
+#ifdef POSIX4_INCLUDE_MAYBES
+#include <sys/types.h>
+#include <fcntl.h>
+#include <time.h>
+#include <signal.h>
+#else
+struct sigevent;
+#endif
+
+typedef int mqd_t;		/* message queue descriptors */
+
+struct mq_attr {
+	long mq_flags;		/* message queue flags */
+	long mq_maxmsg;		/* maximum number of messages */
+	long mq_msgsize;	/* maximum message size */
+	long mq_curmsgs;	/* number of messages currently queued */
+};
+
+#ifndef KERNEL
+#include <sys/cdefs.h>
+
+mqd_t mq_open __P((const char *, int oflag, ...));
+int mq_close __P((mqd_t));
+int mq_unlink __P((const char *));
+int mq_send __P((mqd_t, const char *, size_t, unsigned int));
+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 *));
+
+#endif /* KERNEL */
+
+#endif /* _MQUEUE_H_ */
diff --git a/sys/posix4/posix4.h b/sys/posix4/posix4.h
new file mode 100644
index 0000000..5037b03
--- /dev/null
+++ b/sys/posix4/posix4.h
@@ -0,0 +1,300 @@
+#ifndef _POSIX4_POSIX4_H_
+#define _POSIX4_POSIX4_H_
+/*-
+ * Copyright (c) 1996, 1997, 1998
+ *	HD Associates, Inc.  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 HD Associates, Inc
+ * 4. Neither the name of the author nor the names of any co-contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY HD ASSOCIATES 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 HD ASSOCIATES 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.
+ *
+ */
+
+#if defined(_POSIX_VERSION) && _POSIX_VERSION >= 199309L
+#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
+ * is volatile.
+ *
+ * Locally I've got PRIORITY SCHEDULING
+ * set as a system call available only to root 
+ * and I'm still using a pseudo device to gate everything else.
+ *
+ * This interface vectors us into the kernel through a
+ * POSIX4 pseudo device with some user privilege authorization along
+ * the way.
+ *
+ * XXX I'm going with option 3.
+ *
+ * This has drawbacks from the point of view of ktrace.  There
+ * are (at least) three ways to do this:
+ *
+ * 1. As it is being done, which is bad for ktrace and is hokey
+ *    but is easy to extend during development;
+ * 2. Add a system call for every POSIX4 entry point, which
+ *    will result in many more system calls (on the order of 64)
+ * 3. Add a system call for each POSIX4 option, which is a bit more
+ *    useful for ktrace and will add only about 14 new system calls.
+ * 
+ */
+
+#define POSIX4_FACILITIES 16
+#define POSIX4_ONE_ONLY
+
+/* 
+ * All facility request structures have a posix4_dispatch header
+ * at the front.  Return values are always an indication of
+ * success or failure and are automatically converted into an errno
+ * by the kernel.  "Non-errno" return codes are handled via ret.
+ */
+struct posix4_dispatch {
+	int op;
+	int ret;
+};
+
+#if defined(_POSIX_PRIORITY_SCHEDULING)
+
+/* 
+ * KSCHED_OP_RW is a vector of read/write flags for each entry indexed
+ * by the enum ksched_op.
+ *
+ * 1 means you need write access, 0 means read is sufficient.
+ */
+
+enum ksched_op {
+
+#define KSCHED_OP_RW { 1, 0, 1, 0, 0, 0, 0, 0 }
+
+	SCHED_SETPARAM,
+	SCHED_GETPARAM,
+	SCHED_SETSCHEDULER,
+	SCHED_GETSCHEDULER,
+	SCHED_YIELD,
+	SCHED_GET_PRIORITY_MAX,
+	SCHED_GET_PRIORITY_MIN,
+	SCHED_RR_GET_INTERVAL,
+	SCHED_OP_MAX
+};
+
+struct ksched
+{
+	struct posix4_dispatch dispatch;
+	pid_t pid;
+	int policy;
+	struct sched_param param;
+	struct timespec interval;
+};
+
+#endif /* _POSIX_PRIORITY_SCHEDULING */
+
+#if defined(_POSIX_MEMLOCK) ^ defined(_POSIX_MEMLOCK_RANGE)
+/* This implementation expects these two options to always be together.
+ * If one isn't handled it should be disabled at
+ * run time.
+ */
+#error _POSIX_MEMLOCK and _POSIX_MEMLOCK_RANGE should always be together
+#endif
+
+#if defined(_POSIX_MEMLOCK) && defined(_POSIX_MEMLOCK_RANGE)
+
+enum kmemlock_op {
+
+#define KMEMLOCK_OP_RW { 1, 1, 1, 1 }
+
+	MEMLOCK_MLOCKALL,
+	MEMLOCK_MUNLOCKALL,
+	MEMLOCK_MLOCK,
+	MEMLOCK_MUNLOCK,
+	MEMLOCK_OP_MAX
+};
+
+struct kmemlock
+{
+	struct posix4_dispatch dispatch;
+	int flags;
+	void *addr;
+	size_t len;
+};
+
+#endif /* _POSIX_MEMLOCK && _POSIX_MEMLOCK_RANGE */
+
+#if defined(KERNEL)
+
+struct proc;
+
+void *posix4malloc __P((int *, size_t));
+void posix4free __P((int *, void *));
+int posix4proc __P((struct proc *, pid_t, struct proc **));
+int posix4ioctl __P((dev_t, int, caddr_t, int, struct proc *));
+void posix4attach __P((int));
+void posix4_facility __P((int, int));
+
+struct lkm_table;
+int posix4_init __P((struct lkm_table *, int , int ));
+
+#ifdef _POSIX_PRIORITY_SCHEDULING
+
+int ksched_attach(int, int, void **);
+int ksched_detach(void *);
+
+int ksched_setparam(int *, void *,
+	struct proc *, const struct sched_param *);
+int ksched_getparam(int *, void *,
+	struct proc *, struct sched_param *);
+
+int ksched_setscheduler(int *, void *,
+	struct proc *, int, const struct sched_param *);
+int ksched_getscheduler(int *, void *, struct proc *);
+
+int ksched_yield(int *, void *);
+
+int ksched_get_priority_max(int *, void *, int);
+int ksched_get_priority_min(int *, void *, int);
+
+int ksched_rr_get_interval(int *, void *, struct proc *, struct timespec *);
+
+#endif /* _POSIX_PRIORITY_SCHEDULING */
+
+#if defined(_POSIX_MEMLOCK) && defined(_POSIX_MEMLOCK_RANGE)
+
+int kmemlock_attach(int, int, void **);
+int kmemlock_detach(void *);
+int kmlockall(int *, void *, int);
+int kmunlockall(int *, void *);
+int kmlock(int *, void *, const void *, size_t);
+int kmunlock(int *, void *, const void *, size_t );
+
+#endif /* _POSIX_MEMLOCK && _POSIX_MEMLOCK_RANGE */
+
+#endif	/* KERNEL */
+
+/* A facility is an implementation of one of the optional portions of
+ * POSIX4 as selected by the feature test macros, such as the fixed
+ * priority scheduler or the realtime signals.
+ */
+
+/* Each facility has a facility code, an opcode, and r-w attributes.
+ * To exercise the operation associated with an opcode you need the
+ * appropriate privileges on the POSIX4 device with the facility
+ * bit set in the minor number.  This means that every facility has
+ * a protection bit: Probably more than we need, but it may have
+ * advantages.
+ *
+ */
+
+#define posix4encode(FACILITY, RW) (FACILITY)
+#define posix4decode(X, FACILITY_P) \
+	do { \
+		*(FACILITY_P) = ((X) & 0xff); \
+	} while (0)
+
+/*
+ * The dispatch codes:
+ */
+#define IO_POSIX4_PRIORITY_SCHEDULING _IOWR('r', \
+	CTL_POSIX4_PRIORITY_SCHEDULING, struct ksched)
+
+#define IO_POSIX4_MEMLOCK _IOWR('r', \
+	CTL_POSIX4_MEMLOCK, struct ksched)
+
+/*
+ * CTL_POSIX4 definitions for syscfg
+ */
+
+#define CTL_POSIX4_ASYNCHRONOUS_IO	1	/* boolean */
+#define CTL_POSIX4_MAPPED_FILES		2	/* boolean */
+#define CTL_POSIX4_MEMLOCK		3	/* boolean */
+#define CTL_POSIX4_MEMLOCK_RANGE	4	/* boolean */
+#define CTL_POSIX4_MEMORY_PROTECTION	5	/* boolean */
+#define CTL_POSIX4_MESSAGE_PASSING	6	/* boolean */
+#define CTL_POSIX4_PRIORITIZED_IO	7	/* boolean */
+#define CTL_POSIX4_PRIORITY_SCHEDULING	8	/* boolean */
+#define CTL_POSIX4_REALTIME_SIGNALS	9	/* boolean */
+#define CTL_POSIX4_SEMAPHORES		10	/* boolean */
+#define CTL_POSIX4_FSYNC		11	/* boolean */
+#define CTL_POSIX4_SHARED_MEMORY_OBJECTS 12	/* boolean */
+#define CTL_POSIX4_SYNCHRONIZED_IO	13	/* boolean */
+#define CTL_POSIX4_TIMERS		14	/* boolean */
+#define CTL_POSIX4_AIO_LISTIO_MAX	15	/* int */
+#define CTL_POSIX4_AIO_MAX		16	/* int */
+#define CTL_POSIX4_AIO_PRIO_DELTA_MAX	17	/* int */
+#define CTL_POSIX4_DELAYTIMER_MAX	18	/* int */
+#define CTL_POSIX4_MQ_OPEN_MAX		19	/* int */
+#define CTL_POSIX4_PAGESIZE		20	/* int */
+#define CTL_POSIX4_RTSIG_MAX		21	/* int */
+#define CTL_POSIX4_SEM_NSEMS_MAX	22	/* int */
+#define CTL_POSIX4_SEM_VALUE_MAX	23	/* int */
+#define CTL_POSIX4_SIGQUEUE_MAX		24	/* int */
+#define CTL_POSIX4_TIMER_MAX		25	/* int */
+
+#define CTL_POSIX4_N_CTLS		25
+
+#define	CTL_POSIX4_NAMES { \
+	{ 0, 0 }, \
+	{ "asynchronous_io", CTLTYPE_INT }, \
+	{ "mapped_files", CTLTYPE_INT }, \
+	{ "memlock", CTLTYPE_INT }, \
+	{ "memlock_range", CTLTYPE_INT }, \
+	{ "memory_protection", CTLTYPE_INT }, \
+	{ "message_passing", CTLTYPE_INT }, \
+	{ "prioritized_io", CTLTYPE_INT }, \
+	{ "priority_scheduling", CTLTYPE_INT }, \
+	{ "realtime_signals", CTLTYPE_INT }, \
+	{ "semaphores", CTLTYPE_INT }, \
+	{ "fsync", CTLTYPE_INT }, \
+	{ "shared_memory_objects", CTLTYPE_INT }, \
+	{ "synchronized_io", CTLTYPE_INT }, \
+	{ "timers", CTLTYPE_INT }, \
+	{ "aio_listio_max", CTLTYPE_INT }, \
+	{ "aio_max", CTLTYPE_INT }, \
+	{ "aio_prio_delta_max", CTLTYPE_INT }, \
+	{ "delaytimer_max", CTLTYPE_INT }, \
+	{ "mq_open_max", CTLTYPE_INT }, \
+	{ "pagesize", CTLTYPE_INT }, \
+	{ "rtsig_max", CTLTYPE_INT }, \
+	{ "nsems_max", CTLTYPE_INT }, \
+	{ "sem_value_max", CTLTYPE_INT }, \
+	{ "sigqueue_max", CTLTYPE_INT }, \
+	{ "timer_max", CTLTYPE_INT }, \
+}
+
+#endif /* _POSIX_VERSION >= 199309L */
+#endif /* _POSIX4_POSIX4_H_ */
diff --git a/sys/posix4/posix4_mib.c b/sys/posix4/posix4_mib.c
new file mode 100644
index 0000000..84532b8
--- /dev/null
+++ b/sys/posix4/posix4_mib.c
@@ -0,0 +1,77 @@
+/*-
+ * Copyright (c) 1998
+ *	HD Associates, Inc.  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 HD Associates, Inc
+ * 4. Neither the name of the author nor the names of any co-contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY HD ASSOCIATES 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 HD ASSOCIATES 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.
+ *
+ */
+
+#include <sys/param.h>
+#include <sys/kernel.h>
+#include <sys/sysctl.h>
+#include <sys/unistd.h>
+
+static int facility[CTL_POSIX4_N_CTLS];
+
+#define P4_SYSCTL(num, name)  \
+ SYSCTL_INT(_posix4, num, name, CTLFLAG_RD, facility + num - 1, 0, "");
+
+P4_SYSCTL(CTL_POSIX4_ASYNCHRONOUS_IO, asynchronous_io);
+P4_SYSCTL(CTL_POSIX4_MAPPED_FILES, mapped_files);
+P4_SYSCTL(CTL_POSIX4_MEMLOCK, memlock);
+P4_SYSCTL(CTL_POSIX4_MEMLOCK_RANGE, memlock_range);
+P4_SYSCTL(CTL_POSIX4_MEMORY_PROTECTION, memory_protection);
+P4_SYSCTL(CTL_POSIX4_MESSAGE_PASSING, message_passing);
+P4_SYSCTL(CTL_POSIX4_PRIORITIZED_IO, prioritized_io);
+P4_SYSCTL(CTL_POSIX4_PRIORITY_SCHEDULING, priority_scheduling);
+P4_SYSCTL(CTL_POSIX4_REALTIME_SIGNALS, realtime_signals);
+P4_SYSCTL(CTL_POSIX4_SEMAPHORES, semaphores);
+P4_SYSCTL(CTL_POSIX4_FSYNC, fsync);
+P4_SYSCTL(CTL_POSIX4_SHARED_MEMORY_OBJECTS, shared_memory_objects);
+P4_SYSCTL(CTL_POSIX4_SYNCHRONIZED_IO, synchronized_io);
+P4_SYSCTL(CTL_POSIX4_TIMERS, timers);
+P4_SYSCTL(CTL_POSIX4_AIO_LISTIO_MAX, aio_listio_max);
+P4_SYSCTL(CTL_POSIX4_AIO_MAX, aio_max);
+P4_SYSCTL(CTL_POSIX4_AIO_PRIO_DELTA_MAX, aio_prio_delta_max);
+P4_SYSCTL(CTL_POSIX4_DELAYTIMER_MAX, delaytimer_max);
+P4_SYSCTL(CTL_POSIX4_MQ_OPEN_MAX, mq_open_max);
+P4_SYSCTL(CTL_POSIX4_PAGESIZE, pagesize);
+P4_SYSCTL(CTL_POSIX4_RTSIG_MAX, rtsig_max);
+P4_SYSCTL(CTL_POSIX4_SEM_NSEMS_MAX, sem_nsems_max);
+P4_SYSCTL(CTL_POSIX4_SEM_VALUE_MAX, sem_value_max);
+P4_SYSCTL(CTL_POSIX4_SIGQUEUE_MAX, sigqueue_max);
+P4_SYSCTL(CTL_POSIX4_TIMER_MAX, timer_max);
+
+/* posix4_facility: Set a facility to a value.  This is
+ * probably a temporary measure until the LKM code is combined with this.
+ */
+void posix4_facility(int num, int value)
+{
+	if (num >= 1 && num <= CTL_POSIX4_N_CTLS)
+		facility[num - 1] = value;
+}
diff --git a/sys/posix4/sched.h b/sys/posix4/sched.h
new file mode 100644
index 0000000..50bc3c6
--- /dev/null
+++ b/sys/posix4/sched.h
@@ -0,0 +1,74 @@
+#ifndef _SCHED_H_
+#define _SCHED_H_
+
+/* sched.h: POSIX.4 Process Scheduling header */
+
+/*-
+ * Copyright (c) 1996, 1997
+ *	HD Associates, Inc.  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 HD Associates, Inc
+ *	and Jukka Antero Ukkonen.
+ * 4. Neither the name of the author nor the names of any co-contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY HD ASSOCIATES 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 HD ASSOCIATES 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.
+ *
+ */
+
+#include <unistd.h>
+#include <sys/types.h>	/* For pid_t */
+
+#ifndef KERNEL
+#include <time.h>		/* Per P1003.4 */
+#endif
+
+/* Scheduling policies
+ */
+#define SCHED_FIFO  1
+#define SCHED_OTHER 2
+#define SCHED_RR    3
+
+struct sched_param
+{
+	int sched_priority;
+};
+
+#ifndef KERNEL
+#include <sys/cdefs.h>
+
+int sched_setparam __P((pid_t, const struct sched_param *));
+int sched_getparam __P((pid_t, struct sched_param *));
+
+int sched_setscheduler __P((pid_t, int, const struct sched_param *));
+int sched_getscheduler __P((pid_t));
+
+int sched_yield __P((void));
+int sched_get_priority_max __P((int));
+int sched_get_priority_min __P((int));
+int sched_rr_get_interval __P((pid_t, struct timespec *));
+
+#endif /* KERNEL */
+
+#endif /* _SCHED_H_ */
diff --git a/sys/posix4/semaphore.h b/sys/posix4/semaphore.h
new file mode 100644
index 0000000..fbcab13
--- /dev/null
+++ b/sys/posix4/semaphore.h
@@ -0,0 +1,61 @@
+#ifndef _SEMAPHORE_H_
+#define _SEMAPHORE_H_
+
+/* semaphore.h: POSIX.4 semaphores */
+
+/*-
+ * Copyright (c) 1996, 1997
+ *	HD Associates, Inc.  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 HD Associates, Inc
+ * 4. Neither the name of the author nor the names of any co-contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY HD ASSOCIATES 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 HD ASSOCIATES 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.
+ *
+ */
+
+#ifdef POSIX4_INCLUDE_MAYBES
+#include <sys/types.h>
+#include <fcntl.h>
+#endif
+
+typedef int sem_t;
+
+#ifndef KERNEL
+#include <sys/cdefs.h>
+
+int sem_init __P(sem_t *, int, unsigned int));
+int sem_destroy __P((sem_t *));
+sem_t sem_open __P((const char *, int, ...));
+int sem_close __P((sem_t *));
+int sem_unlink __P((const char *));
+int sem_wait((sem_t *));
+int sem_trywait((sem_t *));
+int sem_post((sem_t *));
+int sem_getvalue((sem_t *, int *));
+
+#endif /* KERNEL */
+
+#endif /* _SEMAPHORE_H_ */