6582 initial reorg adding sys/null.h for 5218

6487 clean up __STDC__ ifdefs in rpcsvc/dbm.h
6563 fmtmsg.h should be simplified and neither define NULL nor _NULL
Reviewed by: Josef 'Jeff' Sipek <jeffpc@josefsipek.net>
Reviewed by: Gary Mills <gary_mills@fastmail.fm>
Reviewed by: Robert Mustacci <rm@joyent.com>
Approved by: Dan McDonald <danmcd@omniti.com>

36 files changed, 146 insertions, 291 deletions

diff --git a/usr/src/cmd/backup/dump/lftw.c b/usr/src/cmd/backup/dump/lftw.c
index 8dfcf7db70..d0a9da65ce 100644
--- a/usr/src/cmd/backup/dump/lftw.c
+++ b/usr/src/cmd/backup/dump/lftw.c
@@ -26,8 +26,6 @@
 /*	Copyright (c) 1988 AT&T	*/
 /*	  All Rights Reserved	*/
 
-#pragma ident	"%Z%%M%	%I%	%E% SMI"
-
 /* LINTLIBRARY */
 /*
  *	ftw - file tree walk
@@ -101,8 +99,6 @@
 #include <unistd.h>
 #include <ftw.h>
 
-#define	NULL 0
-
 static int pwdfd;
 
 static int lf_xftw(
diff --git a/usr/src/cmd/cron/elm.c b/usr/src/cmd/cron/elm.c
index a61ced60ad..7956a0f26b 100644
--- a/usr/src/cmd/cron/elm.c
+++ b/usr/src/cmd/cron/elm.c
@@ -63,7 +63,6 @@
 extern	void *xmalloc(size_t);
 
 #define	INFINITY	2147483647L	/* upper bound on time	*/
-#define	NULL		0		/* a null pointer 	*/
 #define	TRUE		1
 #define	FALSE		0
 
diff --git a/usr/src/cmd/lvm/rpc.metamedd/med_hash.h b/usr/src/cmd/lvm/rpc.metamedd/med_hash.h
index 4886770354..e378fa154d 100644
--- a/usr/src/cmd/lvm/rpc.metamedd/med_hash.h
+++ b/usr/src/cmd/lvm/rpc.metamedd/med_hash.h
@@ -27,16 +27,10 @@
 #ifndef	_MED_HASH_H
 #define	_MED_HASH_H
 
-#pragma ident	"%Z%%M%	%I%	%E% SMI"
-
 #ifdef	__cplusplus
 extern "C" {
 #endif
 
-#ifndef NULL
-#define	NULL	0
-#endif	/* NULL */
-
 typedef struct item_t {
     void *key;
     int	  keyl;
diff --git a/usr/src/cmd/mdb/common/libstand/sys/salib.h b/usr/src/cmd/mdb/common/libstand/sys/salib.h
index c46cdabd26..131efc5b57 100644
--- a/usr/src/cmd/mdb/common/libstand/sys/salib.h
+++ b/usr/src/cmd/mdb/common/libstand/sys/salib.h
@@ -27,9 +27,8 @@
 #ifndef	_SYS_SALIB_H
 #define	_SYS_SALIB_H
 
-#pragma ident	"%Z%%M%	%I%	%E% SMI"
-
 #include <sys/types.h>
+#include <sys/null.h>
 #include <time.h>
 
 #ifdef	__cplusplus
@@ -78,10 +77,6 @@ extern size_t strspn(const char *, const char *);
 extern char *strpbrk(const char *, const char *);
 extern char *strtok(char *, const char *);
 
-#ifndef	NULL
-#define	NULL	(0)
-#endif
-
 #ifdef	__cplusplus
 }
 #endif
diff --git a/usr/src/cmd/mdb/common/mdb/mdb_modapi.h b/usr/src/cmd/mdb/common/mdb/mdb_modapi.h
index 9d08a18c69..4e5d54d7d1 100644
--- a/usr/src/cmd/mdb/common/mdb/mdb_modapi.h
+++ b/usr/src/cmd/mdb/common/mdb/mdb_modapi.h
@@ -37,6 +37,7 @@
  */
 
 #include <sys/types.h>
+#include <sys/null.h>
 #include <gelf.h>
 
 #ifdef	__cplusplus
@@ -44,16 +45,10 @@ extern "C" {
 #endif
 
 /*
- * Make sure that NULL, TRUE, FALSE, MIN, and MAX have the usual definitions
+ * Make sure that TRUE, FALSE, MIN, and MAX have the usual definitions
  * so module writers can depend on these macros and defines.
+ * Make sure NULL is available to module writers by including <sys/null.h>.
  */
-#ifndef NULL
-#if defined(_LP64) && !defined(__cplusplus)
-#define	NULL	0L
-#else
-#define	NULL	0
-#endif
-#endif
 
 #ifndef TRUE
 #define	TRUE	1
diff --git a/usr/src/cmd/sgs/rtld/common/_a.out.h b/usr/src/cmd/sgs/rtld/common/_a.out.h
index 36d5993c9b..0924f01af0 100644
--- a/usr/src/cmd/sgs/rtld/common/_a.out.h
+++ b/usr/src/cmd/sgs/rtld/common/_a.out.h
@@ -26,6 +26,7 @@
 #define	_A_DOT_OUT_DOT_H
 
 #include <sys/types.h>
+#include <sys/null.h>
 #include <sys/mman.h>
 #include <a.out.h>
 #include <_rtld.h>
@@ -63,9 +64,6 @@ typedef struct _rt_aout_private {
 /*
  * Special defines for a.out format file class.
  */
-#ifndef NULL
-#define	NULL	0
-#endif
 #define	N_UNDF	0x0		/* undefined */
 #define	N_ABS	0x2		/* absolute */
 #define	N_COMM	0x12		/* common (internal to ld) */
diff --git a/usr/src/cmd/sh/pwd.c b/usr/src/cmd/sh/pwd.c
index d6e06074fd..631434454d 100644
--- a/usr/src/cmd/sh/pwd.c
+++ b/usr/src/cmd/sh/pwd.c
@@ -20,6 +20,10 @@
  */
 
 /*
+ * Copyright 2015 PALO, Richard.
+ */
+
+/*
  * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
  * Use is subject to license terms.
  */
@@ -28,8 +32,7 @@
 /*	  All Rights Reserved  	*/
 
 
-#pragma ident	"%Z%%M%	%I%	%E% SMI"
-/* 
+/*
  *	UNIX shell
  */
 
@@ -41,11 +44,11 @@
 #include	"defs.h"
 
 #define	DOT		'.'
-#define	NULL	0
-#define	SLASH	'/'
-#define PARTLY	2
+#define	NULLCHAR	'\0'
+#define	SLASH		'/'
+#define	PARTLY		2
 
-static void rmslash();
+static void rmslash(unsigned char *string);
 #ifdef __STDC__
 extern const char	longpwd[];
 #else
@@ -70,27 +73,25 @@ cwd(unsigned char *dir)
 	/* Now remove any .'s */
 
 	pdir = dir;
-	if(*dir == SLASH)
+	if (*dir == SLASH)
 		pdir++;
-	while(*pdir) 			/* remove /./ by itself */
-	{
-		if((*pdir==DOT) && (*(pdir+1)==SLASH))
-		{
+	while (*pdir) {			/* remove /./ by itself */
+		if ((*pdir == DOT) && (*(pdir+1) == SLASH)) {
 			movstr(pdir+2, pdir);
 			continue;
 		}
 		pdir++;
-		while ((*pdir) && (*pdir != SLASH)) 
+		while ((*pdir) && (*pdir != SLASH))
 			pdir++;
-		if (*pdir) 
+		if (*pdir)
 			pdir++;
 	}
 	/* take care of trailing /. */
-	if(*(--pdir)==DOT && pdir > dir && *(--pdir)==SLASH) {
-		if(pdir > dir) {
-			*pdir = NULL;
+	if (*(--pdir) == DOT && pdir > dir && *(--pdir) == SLASH) {
+		if (pdir > dir) {
+			*pdir = NULLCHAR;
 		} else {
-			*(pdir+1) = NULL;
+			*(pdir+1) = NULLCHAR;
 		}
 
 	}
@@ -101,14 +102,12 @@ cwd(unsigned char *dir)
 
 	/* Now that the dir is canonicalized, process it */
 
-	if(*dir==DOT && *(dir+1)==NULL)
-	{
+	if (*dir == DOT && *(dir+1) == NULLCHAR) {
 		return;
 	}
 
 
-	if(*dir==SLASH)
-	{
+	if (*dir == SLASH) {
 		/* Absolute path */
 
 		pcwd = cwdname;
@@ -119,73 +118,62 @@ cwd(unsigned char *dir)
 	{
 		/* Relative path */
 
-		if (didpwd == FALSE) 
+		if (didpwd == FALSE)
 			return;
-		didpwd = PARTLY;	
+		didpwd = PARTLY;
 		pcwd = cwdname + length(cwdname) - 1;
-		if(pcwd != cwdname+1)
+		if (pcwd != cwdname+1)
 			*pcwd++ = SLASH;
 	}
-	while(*dir)
-	{
-		if(*dir==DOT && 
-		   *(dir+1)==DOT &&
-		   (*(dir+2)==SLASH || *(dir+2)==NULL))
-		{
+	while (*dir) {
+		if (*dir == DOT &&
+		    *(dir+1) == DOT &&
+		    (*(dir+2) == SLASH || *(dir+2) == NULLCHAR)) {
 			/* Parent directory, so backup one */
 
-			if( pcwd > cwdname+2 )
+			if (pcwd > cwdname+2)
 				--pcwd;
-			while(*(--pcwd) != SLASH)
+			while (*(--pcwd) != SLASH)
 				;
 			pcwd++;
 			dir += 2;
-			if(*dir==SLASH)
-			{
+			if (*dir == SLASH) {
 				dir++;
 			}
 			continue;
 		}
-	 	if (pcwd >= &cwdname[PATH_MAX+1])
-		{
-			didpwd=FALSE;
+		if (pcwd >= &cwdname[PATH_MAX+1]) {
+			didpwd = FALSE;
 			return;
 		}
 		*pcwd++ = *dir++;
-		while((*dir) && (*dir != SLASH))
-		{  
-	 		if (pcwd >= &cwdname[PATH_MAX+1])
-			{
-				didpwd=FALSE;
+		while ((*dir) && (*dir != SLASH)) {
+			if (pcwd >= &cwdname[PATH_MAX+1]) {
+				didpwd = FALSE;
 				return;
 			}
 			*pcwd++ = *dir++;
-		} 
-		if (*dir) 
-		{
-	 		if (pcwd >= &cwdname[PATH_MAX+1])
-			{
-				didpwd=FALSE;
+		}
+		if (*dir) {
+			if (pcwd >= &cwdname[PATH_MAX+1]) {
+				didpwd = FALSE;
 				return;
 			}
 			*pcwd++ = *dir++;
 		}
 	}
-	if (pcwd >= &cwdname[PATH_MAX+1])
-	{
-		didpwd=FALSE;
+	if (pcwd >= &cwdname[PATH_MAX+1]) {
+		didpwd = FALSE;
 		return;
 	}
-	*pcwd = NULL;
+	*pcwd = NULLCHAR;
 
 	--pcwd;
-	if(pcwd>cwdname && *pcwd==SLASH)
-	{
+	if (pcwd > cwdname && *pcwd == SLASH) {
 		/* Remove trailing / */
 
-		*pcwd = NULL;
+		*pcwd = NULLCHAR;
 	}
-	return;
 }
 
 void
@@ -195,27 +183,28 @@ cwd2()
 	unsigned char *pcwd;
 	/* check if there are any symbolic links in pathname */
 
-	if(didpwd == FALSE)
+	if (didpwd == FALSE)
 		return;
 	pcwd = cwdname + 1;
-	if(didpwd == PARTLY) {
-		while (*pcwd)
-		{
+	if (didpwd == PARTLY) {
+		while (*pcwd) {
 			char c;
-			while((c = *pcwd++) != SLASH && c != '\0');
-			*--pcwd = '\0';
-			if (lstat((char *)cwdname, &stat1) == -1
-		    	|| (stat1.st_mode & S_IFMT) == S_IFLNK) {
+			do {
+				c = *pcwd++;
+			} while (c != SLASH && c != NULLCHAR);
+			*--pcwd = NULLCHAR;
+			if (lstat((char *)cwdname, &stat1) == -1 ||
+			    (stat1.st_mode & S_IFMT) == S_IFLNK) {
 				didpwd = FALSE;
 				*pcwd = c;
 				return;
 			}
 			*pcwd = c;
-			if(c)
+			if (c)
 				pcwd++;
 		}
 		didpwd = TRUE;
-	} else 
+	} else
 		if (stat((char *)cwdname, &stat1) == -1) {
 			didpwd = FALSE;
 			return;
@@ -225,11 +214,10 @@ cwd2()
 	 * consist of symbolic links with ".."
 	 */
 
-	if (stat(".", &stat2) == -1
-	    || stat1.st_dev != stat2.st_dev
-	    || stat1.st_ino != stat2.st_ino)
+	if (stat(".", &stat2) == -1 ||
+	    stat1.st_dev != stat2.st_dev ||
+	    stat1.st_ino != stat2.st_ino)
 		didpwd = FALSE;
-	return;
 }
 
 unsigned char *
@@ -238,9 +226,9 @@ cwdget()
 	cwd2();
 	if (didpwd == FALSE) {
 		if (getcwd((char *)cwdname, PATH_MAX+1) == NULL)
-			*cwdname = 0;
+			*cwdname = NULLCHAR;
 		didpwd = TRUE;
-	} 
+	}
 	return (cwdname);
 }
 
@@ -265,11 +253,10 @@ cwdprint(void)
 	}
 
 	for (cp = cwdname; *cp; cp++) {
-	  prc_buff(*cp);
+		prc_buff(*cp);
 	}
 
 	prc_buff(NL);
-	return;
 }
 
 /*
@@ -277,16 +264,13 @@ cwdprint(void)
  */
 
 static void
-rmslash(string)
-	unsigned char *string;
+rmslash(unsigned char *string)
 {
 	unsigned char *pstring;
 
 	pstring = string;
-	while(*pstring)
-	{
-		if(*pstring==SLASH && *(pstring+1)==SLASH)
-		{
+	while (*pstring) {
+		if (*pstring == SLASH && *(pstring+1) == SLASH) {
 			/* Remove repeated SLASH's */
 
 			movstr(pstring+1, pstring);
@@ -296,11 +280,9 @@ rmslash(string)
 	}
 
 	--pstring;
-	if(pstring>string && *pstring==SLASH)
-	{
+	if (pstring > string && *pstring == SLASH) {
 		/* Remove trailing / */
 
-		*pstring = NULL;
+		*pstring = NULLCHAR;
 	}
-	return;
 }
diff --git a/usr/src/cmd/svr4pkg/libinst/pathdup.c b/usr/src/cmd/svr4pkg/libinst/pathdup.c
index 950d8bc5ed..39c92ce2ce 100644
--- a/usr/src/cmd/svr4pkg/libinst/pathdup.c
+++ b/usr/src/cmd/svr4pkg/libinst/pathdup.c
@@ -46,7 +46,6 @@
  * memory fragmentation to 12.5%
  */
 #define	MEMSIZ	PATH_MAX*8
-#define	NULL	0
 
 struct dup {
 	char	mem[MEMSIZ];
diff --git a/usr/src/cmd/ypcmd/ypxfr.c b/usr/src/cmd/ypcmd/ypxfr.c
index 15846cbc28..c6a8d403aa 100644
--- a/usr/src/cmd/ypcmd/ypxfr.c
+++ b/usr/src/cmd/ypcmd/ypxfr.c
@@ -32,8 +32,6 @@
  * California.
  */
 
-#pragma ident	"%Z%%M%	%I%	%E% SMI"
-
 /*
  * This is a user command which gets a NIS data base from some running
  * server, and gets it to the local site by using the normal NIS client
@@ -72,7 +70,6 @@
  */
 
 #include <ndbm.h>
-#undef NULL
 #define	DATUM
 
 #include <stdio.h>
diff --git a/usr/src/common/net/dhcp/octet.c b/usr/src/common/net/dhcp/octet.c
index 973381b033..d8367bbf0b 100644
--- a/usr/src/common/net/dhcp/octet.c
+++ b/usr/src/common/net/dhcp/octet.c
@@ -24,8 +24,6 @@
  * Use is subject to license terms.
  */
 
-#pragma ident	"%Z%%M%	%I%	%E% SMI"
-
 /* LINTLIBRARY */
 
 #if !defined(_BOOT) && !defined(_KERNEL)
@@ -34,10 +32,10 @@
 #include <stdlib.h>
 #endif	/* _BOOT && _KERNEL */
 #include <sys/types.h>
+#include <sys/null.h>
 #include <sys/errno.h>
 
 #if	defined(_BOOT) || defined(_KERNEL)
-#define	NULL		0
 #define	isdigit(c)	((c) >= '0' && c <= '9')
 #define	isxdigit(c)	(isdigit(c) || (((c) >= 'a') && ((c) <= 'f')) || \
 			(((c) >= 'A') && ((c) <= 'F')))
diff --git a/usr/src/common/util/getoptstr.c b/usr/src/common/util/getoptstr.c
index 75a16c8860..541a287058 100644
--- a/usr/src/common/util/getoptstr.c
+++ b/usr/src/common/util/getoptstr.c
@@ -28,8 +28,6 @@
 /*	  All Rights Reserved  	*/
 
 
-#pragma ident	"%Z%%M%	%I%	%E% SMI"
-
 /*
  * This file contains getoptstr(), which is getopt() for strings of arguments
  * (not arrays of strings).  It is used by the bootloader ({*fs,inet}boot) and
@@ -38,6 +36,7 @@
 
 
 #include "getoptstr.h"
+#include <sys/null.h>
 
 
 /*
@@ -46,8 +45,6 @@
 char *strchr(const char *s, int c);
 
 
-#define	NULL	((void *)0)
-
 #define	ISNTWORDCH(c)	((c) == '\0' || ISSPACE(c))
 
 
diff --git a/usr/src/common/util/string.c b/usr/src/common/util/string.c
index d54b58d59c..0195aaa6e0 100644
--- a/usr/src/common/util/string.c
+++ b/usr/src/common/util/string.c
@@ -30,6 +30,7 @@
  */
 
 #include <sys/types.h>
+#include <sys/null.h>
 #include <sys/varargs.h>
 
 #if defined(_KERNEL)
@@ -39,10 +40,6 @@
 #include <string.h>
 #endif
 
-#ifndef	NULL
-#define	NULL	0l
-#endif
-
 #include "memcpy.h"
 #include "string.h"
 
diff --git a/usr/src/head/fmtmsg.h b/usr/src/head/fmtmsg.h
index 209439f066..8fcbf9405e 100644
--- a/usr/src/head/fmtmsg.h
+++ b/usr/src/head/fmtmsg.h
@@ -25,6 +25,7 @@
 
 /*
  * Copyright 2014 Garrett D'Amore <garrett@damore.org>
+ * Copyright 2014-2015 PALO, Richard.
  *
  * Copyright 1996-2003 Sun Microsystems, Inc.  All rights reserved.
  * Use is subject to license terms.
@@ -49,23 +50,6 @@ extern "C" {
  */
 
 /*
- * Define the value "NULL" if it hasn't been defined already.
- * NULL breaks namespace so we define _NULL
- */
-#if defined(_LP64)
-#define	_NULL	0L
-#else
-#define	_NULL	0
-#endif
-
-#if !defined(_XPG4_2) || defined(__EXTENSIONS__)
-#ifndef NULL
-#define	NULL	_NULL
-#endif
-#endif /* !defined(_XPG4_2) || defined(__EXTENSIONS__) */
-
-
-/*
  * Constraint definitions:
  *	MM_MXLABELLN	Maximum size of a "label" in a message
  *	MM_MXTAGLN	Maximum size of a "tag" in a message
@@ -174,12 +158,12 @@ extern "C" {
  *	MM_NULLTAG		Null value for the tag-component
  */
 
-#define	MM_NULLLBL	((char *)_NULL)
+#define	MM_NULLLBL	((char *)0)
 #define	MM_NULLSEV	MM_NOSEV
 #define	MM_NULLMC	MM_NULL
-#define	MM_NULLTXT	((char *)_NULL)
-#define	MM_NULLACT	((char *)_NULL)
-#define	MM_NULLTAG	((char *)_NULL)
+#define	MM_NULLTXT	((char *)0)
+#define	MM_NULLACT	((char *)0)
+#define	MM_NULLTAG	((char *)0)
 
 /*
  * Values returned by fmtmsg()
diff --git a/usr/src/head/iso/locale_iso.h b/usr/src/head/iso/locale_iso.h
index 4b410c838a..5ef1a4e9d0 100644
--- a/usr/src/head/iso/locale_iso.h
+++ b/usr/src/head/iso/locale_iso.h
@@ -21,6 +21,7 @@
  */
 /*
  * Copyright 2014 Garrett D'Amore <garrett@damore.org>
+ * Copyright 2014 PALO, Richard.
  *
  * Copyright 2005 Sun Microsystems, Inc.  All rights reserved.
  * Use is subject to license terms.
@@ -46,6 +47,7 @@
 #define	_ISO_LOCALE_ISO_H
 
 #include <sys/feature_tests.h>
+#include <sys/null.h>
 
 #ifdef __cplusplus
 extern "C" {
@@ -99,14 +101,6 @@ struct lconv {
 #define	LC_MESSAGES	5
 #define	LC_ALL		6
 
-#ifndef	NULL
-#if defined(_LP64)
-#define	NULL    0L
-#else
-#define	NULL    0
-#endif
-#endif
-
 extern char	*setlocale(int, const char *);
 extern struct lconv *localeconv(void);
 
diff --git a/usr/src/head/iso/stddef_iso.h b/usr/src/head/iso/stddef_iso.h
index 48a7ed6875..ce422a71e0 100644
--- a/usr/src/head/iso/stddef_iso.h
+++ b/usr/src/head/iso/stddef_iso.h
@@ -29,6 +29,10 @@
  */
 
 /*
+ * Copyright 2014 PALO, Richard.
+ */
+
+/*
  * An application should not include this header directly.  Instead it
  * should be included only through the inclusion of other Sun headers.
  *
@@ -43,9 +47,8 @@
 #ifndef _ISO_STDDEF_ISO_H
 #define	_ISO_STDDEF_ISO_H
 
-#pragma ident	"%Z%%M%	%I%	%E% SMI" /* SVr4.0 1.5 */
-
 #include <sys/isa_defs.h>
+#include <sys/null.h>
 
 #ifdef	__cplusplus
 extern "C" {
@@ -55,14 +58,6 @@ extern "C" {
 namespace std {
 #endif
 
-#ifndef	NULL
-#if defined(_LP64)
-#define	NULL    0L
-#else
-#define	NULL    0
-#endif
-#endif
-
 #if !defined(_PTRDIFF_T) || __cplusplus >= 199711L
 #define	_PTRDIFF_T
 #if defined(_LP64) || defined(_I32LPx)
diff --git a/usr/src/head/iso/stdio_iso.h b/usr/src/head/iso/stdio_iso.h
index 1dec847790..d09c982a9c 100644
--- a/usr/src/head/iso/stdio_iso.h
+++ b/usr/src/head/iso/stdio_iso.h
@@ -21,6 +21,7 @@
  */
 /*
  * Copyright 2014 Garrett D'Amore <garrett@damore.org>
+ * Copyright 2014 PALO, Richard.
  *
  * Copyright 2005 Sun Microsystems, Inc.  All rights reserved.
  * Use is subject to license terms.
@@ -49,6 +50,7 @@
 #define	_ISO_STDIO_ISO_H
 
 #include <sys/feature_tests.h>
+#include <sys/null.h>
 #include <sys/va_list.h>
 #include <stdio_tag.h>
 #include <stdio_impl.h>
@@ -110,14 +112,6 @@ typedef	__longlong_t	fpos_t;
 }
 #endif /* end of namespace std */
 
-#ifndef	NULL
-#if defined(_LP64)
-#define	NULL	0L
-#else
-#define	NULL	0
-#endif
-#endif
-
 #define	BUFSIZ	1024
 
 /*
diff --git a/usr/src/head/iso/stdlib_iso.h b/usr/src/head/iso/stdlib_iso.h
index a2752ca421..2caa289e35 100644
--- a/usr/src/head/iso/stdlib_iso.h
+++ b/usr/src/head/iso/stdlib_iso.h
@@ -21,6 +21,7 @@
  */
 /*
  * Copyright 2014 Garrett D'Amore <garrett@damore.org>
+ * Copyright 2014 PALO, Richard.
  *
  * Copyright 2005 Sun Microsystems, Inc.  All rights reserved.
  * Use is subject to license terms.
@@ -46,6 +47,7 @@
 #define	_ISO_STDLIB_ISO_H
 
 #include <sys/feature_tests.h>
+#include <sys/null.h>
 
 #ifdef	__cplusplus
 extern "C" {
@@ -79,14 +81,6 @@ typedef unsigned int    size_t;		/* (historical version) */
 #endif
 #endif	/* !_SIZE_T */
 
-#ifndef	NULL
-#if defined(_LP64)
-#define	NULL	0L
-#else
-#define	NULL	0
-#endif
-#endif
-
 #define	EXIT_FAILURE	1
 #define	EXIT_SUCCESS    0
 #define	RAND_MAX	32767
diff --git a/usr/src/head/iso/string_iso.h b/usr/src/head/iso/string_iso.h
index e1cae79472..7ed67d2240 100644
--- a/usr/src/head/iso/string_iso.h
+++ b/usr/src/head/iso/string_iso.h
@@ -25,6 +25,7 @@
 
 /*
  * Copyright 2014 Garrett D'Amore <garrett@damore.org>
+ * Copyright 2014 PALO, Richard.
  *
  * Copyright 2004 Sun Microsystems, Inc.  All rights reserved.
  * Use is subject to license terms.
@@ -46,6 +47,7 @@
 #define	_ISO_STRING_ISO_H
 
 #include <sys/feature_tests.h>
+#include <sys/null.h>
 
 #ifdef	__cplusplus
 extern "C" {
@@ -64,14 +66,6 @@ typedef unsigned int	size_t;		/* (historical version) */
 #endif
 #endif	/* !_SIZE_T */
 
-#ifndef	NULL
-#if defined(_LP64)
-#define	NULL	0L
-#else
-#define	NULL	0
-#endif
-#endif
-
 extern int memcmp(const void *, const void *, size_t);
 extern void *memcpy(void *_RESTRICT_KYWD, const void *_RESTRICT_KYWD, size_t);
 extern void *memmove(void *, const void *, size_t);
diff --git a/usr/src/head/iso/time_iso.h b/usr/src/head/iso/time_iso.h
index bc94ec8995..511e3cf6b4 100644
--- a/usr/src/head/iso/time_iso.h
+++ b/usr/src/head/iso/time_iso.h
@@ -24,6 +24,7 @@
 
 /*
  * Copyright 2014 Garrett D'Amore <garrett@damore.org>
+ * Copyright 2014 PALO, Richard.
  *
  * Copyright 2004 Sun Microsystems, Inc.  All rights reserved.
  * Use is subject to license terms.
@@ -45,6 +46,7 @@
 #define	_ISO_TIME_ISO_H
 
 #include <sys/feature_tests.h>
+#include <sys/null.h>
 
 #ifdef	__cplusplus
 extern "C" {
@@ -54,14 +56,6 @@ extern "C" {
 namespace std {
 #endif
 
-#ifndef NULL
-#if defined(_LP64)
-#define	NULL	0L
-#else
-#define	NULL	0
-#endif
-#endif
-
 #if !defined(_SIZE_T) || __cplusplus >= 199711L
 #define	_SIZE_T
 #if defined(_LP64) || defined(_I32LPx)
diff --git a/usr/src/head/iso/wchar_iso.h b/usr/src/head/iso/wchar_iso.h
index 14763f0165..d7f35066d2 100644
--- a/usr/src/head/iso/wchar_iso.h
+++ b/usr/src/head/iso/wchar_iso.h
@@ -21,6 +21,7 @@
 
 /*
  * Copyright 2014 Garrett D'Amore <garrett@damore.org>
+ * Copyright 2014 PALO, Richard.
  *
  * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
  * Use is subject to license terms.
@@ -42,6 +43,7 @@
 #define	_ISO_WCHAR_ISO_H
 
 #include <sys/feature_tests.h>
+#include <sys/null.h>
 #include <stdio_tag.h>
 #include <wchar_impl.h>
 #include <iso/time_iso.h>
@@ -109,14 +111,6 @@ typedef unsigned int	size_t;		/* (historical version) */
 #endif
 #endif  /* !defined(_SIZE_T) || __cplusplus >= 199711L */
 
-#ifndef NULL
-#if defined(_LP64)
-#define	NULL	0L
-#else
-#define	NULL	0
-#endif
-#endif /* !NULL */
-
 #ifndef WEOF
 #if __cplusplus >= 199711L
 #define	WEOF	((std::wint_t)(-1))
diff --git a/usr/src/head/mon.h b/usr/src/head/mon.h
index 9150b7ac87..26061153b5 100644
--- a/usr/src/head/mon.h
+++ b/usr/src/head/mon.h
@@ -24,6 +24,7 @@
 
 /*
  * Copyright 2014 Garrett D'Amore <garrett@damore.org>
+ * Copyright 2014 PALO, Richard.
  *
  * Copyright 1997-2003 Sun Microsystems, Inc.  All rights reserved.
  * Use is subject to license terms.
@@ -32,6 +33,8 @@
 #ifndef _MON_H
 #define	_MON_H
 
+#include <sys/null.h>
+
 #ifdef	__cplusplus
 extern "C" {
 #endif
@@ -66,14 +69,6 @@ typedef unsigned short WORD;
 #define	MPROGS0	(150 * sizeof (WORD))	/* 300 for pdp11, 600 for 32-bits */
 #define	MSCALE0	4
 
-#ifndef NULL
-#if defined(_LP64)
-#define	NULL	0L
-#else
-#define	NULL	0
-#endif
-#endif
-
 extern void monitor(int (*)(void), int (*)(void), WORD *, size_t, size_t);
 
 #ifdef	__cplusplus
diff --git a/usr/src/head/rpcsvc/dbm.h b/usr/src/head/rpcsvc/dbm.h
index 110d8b990d..1a1092b89f 100644
--- a/usr/src/head/rpcsvc/dbm.h
+++ b/usr/src/head/rpcsvc/dbm.h
@@ -20,6 +20,8 @@
  * CDDL HEADER END
  */
 /*
+ * Copyright 2014, 2016 PALO, Richard.
+ *
  * Copyright 1989 Sun Microsystems, Inc.  All rights reserved.
  * Use is subject to license terms.
  */
@@ -35,7 +37,8 @@
 #ifndef	_RPCSVC_DBM_H
 #define	_RPCSVC_DBM_H
 
-#pragma ident	"%Z%%M%	%I%	%E% SMI"
+#include <sys/isa_defs.h>
+#include <sys/null.h>
 
 #ifdef	__cplusplus
 extern "C" {
@@ -44,9 +47,6 @@ extern "C" {
 #define	PBLKSIZ	1024
 #define	DBLKSIZ	4096
 #define	BYTESIZ	8
-#ifndef NULL
-#define	NULL	((char *)0)
-#endif
 
 long	bitno;
 long	maxbno;
@@ -66,7 +66,6 @@ typedef	struct
 	int	dsize;
 } datum;
 
-#ifdef __STDC_
 datum	fetch(datum);
 datum	makdatum(char *, int);
 datum	firstkey(void);
@@ -74,15 +73,6 @@ datum	nextkey(datum);
 datum	firsthash(long);
 long	calchash(datum);
 long	hashinc(long);
-#else
-datum	fetch();
-datum	makdatum();
-datum	firstkey();
-datum	nextkey();
-datum	firsthash();
-long	calchash();
-long	hashinc();
-#endif
 
 #ifdef	__cplusplus
 }
diff --git a/usr/src/head/unistd.h b/usr/src/head/unistd.h
index a25da31d15..967c8179bc 100644
--- a/usr/src/head/unistd.h
+++ b/usr/src/head/unistd.h
@@ -20,6 +20,7 @@
  */
 
 /*
+ * Copyright 2014 PALO, Richard.
  * Copyright 2014 Garrett D'Amore <garrett@damore.org>
  * Copyright (c) 2013 Gary Mills
  *
@@ -36,6 +37,7 @@
 
 #include <sys/feature_tests.h>
 
+#include <sys/null.h>
 #include <sys/types.h>
 #include <sys/unistd.h>
 
@@ -178,14 +180,6 @@ extern "C" {
 #define	_POSIX_VDISABLE		0
 #endif
 
-#ifndef NULL
-#if defined(_LP64)
-#define	NULL	0L
-#else
-#define	NULL	0
-#endif
-#endif
-
 #define	STDIN_FILENO	0
 #define	STDOUT_FILENO	1
 #define	STDERR_FILENO	2
diff --git a/usr/src/pkg/manifests/system-header.mf b/usr/src/pkg/manifests/system-header.mf
index b152b2179e..72efa63d8e 100644
--- a/usr/src/pkg/manifests/system-header.mf
+++ b/usr/src/pkg/manifests/system-header.mf
@@ -1263,6 +1263,7 @@ file path=usr/include/sys/neti.h
 file path=usr/include/sys/netstack.h
 file path=usr/include/sys/nexusdefs.h
 file path=usr/include/sys/note.h
+file path=usr/include/sys/null.h
 file path=usr/include/sys/nvpair.h
 file path=usr/include/sys/nvpair_impl.h
 file path=usr/include/sys/objfs.h
diff --git a/usr/src/ucbhead/dbm.h b/usr/src/ucbhead/dbm.h
index da9110584b..4cbff5d309 100644
--- a/usr/src/ucbhead/dbm.h
+++ b/usr/src/ucbhead/dbm.h
@@ -40,7 +40,8 @@
 #ifndef _DBM_H
 #define	_DBM_H
 
-#pragma ident	"%Z%%M%	%I%	%E% SMI"
+#include <sys/isa_defs.h>
+#include <sys/null.h>
 
 #ifdef __cplusplus
 extern "C" {
@@ -50,10 +51,6 @@ extern "C" {
 #define	DBLKSIZ	4096
 #define	BYTESIZ	8
 
-#ifndef	NULL
-#define	NULL	((char *) 0)
-#endif
-
 long	bitno;
 long	maxbno;
 long	blkno;
diff --git a/usr/src/ucbhead/stdio.h b/usr/src/ucbhead/stdio.h
index dd6cc3bce9..1ba873295e 100644
--- a/usr/src/ucbhead/stdio.h
+++ b/usr/src/ucbhead/stdio.h
@@ -48,6 +48,7 @@
 #include <sys/va_list.h>
 #include <stdio_tag.h>
 #include <stdio_impl.h>
+#include <sys/null.h>
 
 #ifdef __cplusplus
 extern "C" {
@@ -77,10 +78,6 @@ typedef long	ssize_t;
 
 typedef long	fpos_t;
 
-#ifndef NULL
-#define	NULL		0
-#endif
-
 #define	BUFSIZ		1024
 
 #if defined(__i386)
diff --git a/usr/src/ucbhead/sys/param.h b/usr/src/ucbhead/sys/param.h
index dfd47aeb9d..b3927a6132 100644
--- a/usr/src/ucbhead/sys/param.h
+++ b/usr/src/ucbhead/sys/param.h
@@ -40,8 +40,6 @@
 #ifndef	_SYS_PARAM_H
 #define	_SYS_PARAM_H
 
-#pragma ident	"%Z%%M%	%I%	%E% SMI"
-
 
 /*
  * Fundamental variables; don't change too often.
@@ -128,12 +126,6 @@ extern "C" {
 #define	NBPS	0x20000		/* Number of bytes per segment */
 #define	NBPW	sizeof (int)	/* number of bytes in an integer */
 
-#if	defined(_LP64) && !defined(__cplusplus)
-#define	NULL	0L
-#else
-#define	NULL	0
-#endif
-
 #define	CMASK	0		/* default mask for file creation */
 #define	CDLIMIT	(1L<<11)	/* default max write address */
 #define	NODEV	(dev_t)(-1)
diff --git a/usr/src/ucbhead/unistd.h b/usr/src/ucbhead/unistd.h
index 420e070285..a527305094 100644
--- a/usr/src/ucbhead/unistd.h
+++ b/usr/src/ucbhead/unistd.h
@@ -40,9 +40,8 @@
 #ifndef _UNISTD_H
 #define	_UNISTD_H
 
-#pragma ident	"%Z%%M%	%I%	%E% SMI"
-
 #include <sys/fcntl.h>
+#include <sys/null.h>
 
 #ifdef __cplusplus
 extern "C" {
diff --git a/usr/src/uts/common/fs/nfs/nfs_strerror.c b/usr/src/uts/common/fs/nfs/nfs_strerror.c
index 8fa36b5e93..40fdf070b0 100644
--- a/usr/src/uts/common/fs/nfs/nfs_strerror.c
+++ b/usr/src/uts/common/fs/nfs/nfs_strerror.c
@@ -24,8 +24,6 @@
  * Use is subject to license terms.
  */
 
-#pragma ident	"%Z%%M%	%I%	%E% SMI"
-
 /*
  * This file contains code to support better NFS error messages.  Death to
  * integer codes in user error messages!
@@ -35,15 +33,12 @@
  */
 
 #include <nfs/nfs.h>
+#include <sys/null.h>
 #include <sys/systm.h>
 #include <sys/cmn_err.h>
 #include <sys/errno.h>
 #include <sys/varargs.h>
 
-#ifndef NULL
-#define	NULL	0
-#endif
-
 /* size of a temporary printf format buffer. */
 #define	FMT_BUF_SIZE	1024
 
diff --git a/usr/src/uts/common/os/iscsiboot_prop.c b/usr/src/uts/common/os/iscsiboot_prop.c
index e803fefc0f..6510c343bd 100644
--- a/usr/src/uts/common/os/iscsiboot_prop.c
+++ b/usr/src/uts/common/os/iscsiboot_prop.c
@@ -29,6 +29,7 @@
  */
 
 #include <sys/types.h>
+#include <sys/null.h>
 #include <sys/bootprops.h>
 #include <sys/cmn_err.h>
 #include <sys/socket.h>
@@ -46,10 +47,6 @@ int  iscsi_print_bootprop	=	0;
 
 #define	ISCSI_BOOTPROP_BUFLEN	256
 
-#ifndef	NULL
-#define	NULL	0
-#endif
-
 static int replace_sp_c(unsigned char *dst, unsigned char *source, size_t n);
 
 static void
diff --git a/usr/src/uts/common/rpc/types.h b/usr/src/uts/common/rpc/types.h
index 59258793e4..2378e8c9af 100644
--- a/usr/src/uts/common/rpc/types.h
+++ b/usr/src/uts/common/rpc/types.h
@@ -35,12 +35,11 @@
 #ifndef _RPC_TYPES_H
 #define	_RPC_TYPES_H
 
-#pragma ident	"%Z%%M%	%I%	%E% SMI"
-
 /*
  * Rpc additions to <sys/types.h>
  */
 #include <sys/types.h>
+#include <sys/null.h>
 
 #ifdef __cplusplus
 extern "C" {
@@ -83,10 +82,6 @@ typedef long rpc_inline_t;
 #define	TRUE	(1)
 #endif
 
-#ifndef	NULL
-#define	NULL	0
-#endif
-
 #ifndef	_KERNEL
 #define	mem_alloc(bsize)	malloc(bsize)
 #define	mem_free(ptr, bsize)	free(ptr)
diff --git a/usr/src/uts/common/sys/Makefile b/usr/src/uts/common/sys/Makefile
index 94c09029b5..99b877c0a3 100644
--- a/usr/src/uts/common/sys/Makefile
+++ b/usr/src/uts/common/sys/Makefile
@@ -415,6 +415,7 @@ CHKHDRS=			\
 	netstack.h		\
 	nexusdefs.h		\
 	note.h			\
+	null.h			\
 	nvpair.h		\
 	nvpair_impl.h		\
 	objfs.h			\
diff --git a/usr/src/uts/common/sys/null.h b/usr/src/uts/common/sys/null.h
new file mode 100644
index 0000000000..da580d05c4
--- /dev/null
+++ b/usr/src/uts/common/sys/null.h
@@ -0,0 +1,29 @@
+/*
+ * This file and its contents are supplied under the terms of the
+ * Common Development and Distribution License ("CDDL"), version 1.0.
+ * You may only use this file in accordance with the terms of version
+ * 1.0 of the CDDL.
+ *
+ * A full copy of the text of the CDDL should have accompanied this
+ * source.  A copy of the CDDL is also available via the Internet at
+ * http://www.illumos.org/license/CDDL.
+ */
+
+/*
+ * Copyright 2014-2016 PALO, Richard.
+ */
+
+#ifndef _SYS_NULL_H
+#define	_SYS_NULL_H
+
+#ifndef	NULL
+
+#if defined(_LP64)
+#define	NULL	0L
+#else
+#define	NULL	0
+#endif
+
+#endif	/* NULL */
+
+#endif	/* _SYS_NULL_H */
diff --git a/usr/src/uts/common/sys/param.h b/usr/src/uts/common/sys/param.h
index 01c25610dd..c3a1b9a97b 100644
--- a/usr/src/uts/common/sys/param.h
+++ b/usr/src/uts/common/sys/param.h
@@ -45,6 +45,7 @@
 #include <sys/isa_defs.h>
 #endif /* _ASM */
 
+#include <sys/null.h>
 
 #ifdef	__cplusplus
 extern "C" {
@@ -147,14 +148,6 @@ extern "C" {
 
 #define	NBPW	sizeof (int)	/* number of bytes in an integer */
 
-#ifndef	NULL
-#if defined(_LP64)
-#define	NULL    0L
-#else
-#define	NULL	0
-#endif
-#endif
-
 #define	CMASK	022		/* default mask for file creation */
 #define	CDLIMIT	(1L<<11)	/* default max write address */
 #define	NBPS		0x20000	/* Number of bytes per segment */
diff --git a/usr/src/uts/common/sys/sysevent.h b/usr/src/uts/common/sys/sysevent.h
index 2b26441973..46a800e62b 100644
--- a/usr/src/uts/common/sys/sysevent.h
+++ b/usr/src/uts/common/sys/sysevent.h
@@ -27,19 +27,12 @@
 #define	_SYS_SYSEVENT_H
 
 #include <sys/nvpair.h>
+#include <sys/null.h>
 
 #ifdef	__cplusplus
 extern "C" {
 #endif
 
-#ifndef	NULL
-#if defined(_LP64) && !defined(__cplusplus)
-#define	NULL    0L
-#else
-#define	NULL	0
-#endif
-#endif
-
 /* Internal registration class and subclass */
 #define	EC_ALL		"register_all_classes"
 #define	EC_SUB_ALL	"register_all_subclasses"
diff --git a/usr/src/uts/i86pc/os/ibft.c b/usr/src/uts/i86pc/os/ibft.c
index 43ffad5e81..d9ed882705 100644
--- a/usr/src/uts/i86pc/os/ibft.c
+++ b/usr/src/uts/i86pc/os/ibft.c
@@ -30,6 +30,7 @@
  */
 
 #include <sys/types.h>
+#include <sys/null.h>
 #include <sys/cmn_err.h>
 #include <sys/socket.h>
 #include <netinet/in.h>
@@ -39,10 +40,6 @@
 #include <sys/psm.h>
 #include <sys/bootconf.h>
 
-#ifndef	NULL
-#define	NULL	0
-#endif
-
 typedef enum ibft_structure_type {
 	Reserved	=	0,
 	Control		=	1,