diff --git a/make/scripts/webrev.ksh b/make/scripts/webrev.ksh
new file mode 100644
index 00000000000..b4ba97bf6a2
--- /dev/null
+++ b/make/scripts/webrev.ksh
@@ -0,0 +1,3182 @@
+#!/bin/ksh -p
+#
+# CDDL HEADER START
+#
+# The contents of this file are subject to the terms of the
+# Common Development and Distribution License (the "License").
+# You may not use this file except in compliance with the License.
+#
+# You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+# or http://www.opensolaris.org/os/licensing.
+# See the License for the specific language governing permissions
+# and limitations under the License.
+#
+# When distributing Covered Code, include this CDDL HEADER in each
+# file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+# If applicable, add the following below this CDDL HEADER, with the
+# fields enclosed by brackets "[]" replaced with your own identifying
+# information: Portions Copyright [yyyy] [name of copyright owner]
+#
+# CDDL HEADER END
+#
+# Copyright (c) 2008, 2011, Oracle and/or its affiliates. All rights reserved.
+# Use is subject to license terms.
+#
+# This script takes a file list and a workspace and builds a set of html files
+# suitable for doing a code review of source changes via a web page.
+# Documentation is available via 'webrev -h'.
+#
+
+WEBREV_UPDATED=23.18-hg
+
+HTML='
+
+\n'
+
+FRAMEHTML='
+
+\n'
+
+STDHEAD='
+
+
+
+
+
+
+'
+
+#
+# UDiffs need a slightly different CSS rule for 'new' items (we don't
+# want them to be bolded as we do in cdiffs or sdiffs).
+#
+UDIFFCSS='
+
+'
+
+#
+# input_cmd | html_quote | output_cmd
+# or
+# html_quote filename | output_cmd
+#
+# Make a piece of source code safe for display in an HTML block.
+#
+html_quote()
+{
+ sed -e "s/&/\&/g" -e "s//\>/g" "$@" | expand
+}
+
+#
+# input_cmd | bug2url | output_cmd
+#
+# Scan for bugids and insert links to the relevent bug database.
+#
+bug2url()
+{
+ sed -e 's|[0-9]\{5,\}|&|g'
+}
+
+#
+# input_cmd | sac2url | output_cmd
+#
+# Scan for ARC cases and insert links to the relevent SAC database.
+# This is slightly complicated because inside the SWAN, SAC cases are
+# grouped by ARC: PSARC/2006/123. But on OpenSolaris.org, they are
+# referenced as 2006/123 (without labelling the ARC).
+#
+sac2url()
+{
+ if [[ -z $Oflag ]]; then
+ sed -e 's|\([A-Z]\{1,2\}ARC\)[ /]\([0-9]\{4\}\)/\([0-9]\{3\}\)|\1 \2/\3|g'
+ else
+ sed -e 's|\([A-Z]\{1,2\}ARC\)[ /]\([0-9]\{4\}\)/\([0-9]\{3\}\)|\1 \2/\3|g'
+ fi
+}
+
+#
+# strip_unchanged | output_cmd
+#
+# Removes chunks of sdiff documents that have not changed. This makes it
+# easier for a code reviewer to find the bits that have changed.
+#
+# Deleted lines of text are replaced by a horizontal rule. Some
+# identical lines are retained before and after the changed lines to
+# provide some context. The number of these lines is controlled by the
+# variable C in the $AWK script below.
+#
+# The script detects changed lines as any line that has a "
"
+ inx = c % C
+ c = C
+ }
+
+ for (i = 0; i < c; i++)
+ print ln[(inx + i) % C]
+ }
+ c = 0;
+ print
+ next
+ }
+ { if (c >= C) {
+ ln[c % C] = $0
+ c++;
+ next;
+ }
+ c++;
+ print
+ }
+ END { if (c > (C * 2)) print "\n
" }
+
+ ' $1
+}
+
+#
+# sdiff_to_html
+#
+# This function takes two files as arguments, obtains their diff, and
+# processes the diff output to present the files as an HTML document with
+# the files displayed side-by-side, differences shown in color. It also
+# takes a delta comment, rendered as an HTML snippet, as the third
+# argument. The function takes two files as arguments, then the name of
+# file, the path, and the comment. The HTML will be delivered on stdout,
+# e.g.
+#
+# $ sdiff_to_html old/usr/src/tools/scripts/webrev.sh \
+# new/usr/src/tools/scripts/webrev.sh \
+# webrev.sh usr/src/tools/scripts \
+# '
+# 1234567 my bugid' > .html
+#
+# framed_sdiff() is then called which creates $2.frames.html
+# in the webrev tree.
+#
+# FYI: This function is rather unusual in its use of awk. The initial
+# diff run produces conventional diff output showing changed lines mixed
+# with editing codes. The changed lines are ignored - we're interested in
+# the editing codes, e.g.
+#
+# 8c8
+# 57a61
+# 63c66,76
+# 68,93d80
+# 106d90
+# 108,110d91
+#
+# These editing codes are parsed by the awk script and used to generate
+# another awk script that generates HTML, e.g the above lines would turn
+# into something like this:
+#
+# BEGIN { printf "\n" }
+# function sp(n) {for (i=0;i%4d %s \n", n, NR, $0}
+# NR==8 {wl("#7A7ADD");next}
+# NR==54 {wl("#7A7ADD");sp(3);next}
+# NR==56 {wl("#7A7ADD");next}
+# NR==57 {wl("black");printf "\n"; next}
+# : :
+#
+# This script is then run on the original source file to generate the
+# HTML that corresponds to the source file.
+#
+# The two HTML files are then combined into a single piece of HTML that
+# uses an HTML table construct to present the files side by side. You'll
+# notice that the changes are color-coded:
+#
+# black - unchanged lines
+# blue - changed lines
+# bold blue - new lines
+# brown - deleted lines
+#
+# Blank lines are inserted in each file to keep unchanged lines in sync
+# (side-by-side). This format is familiar to users of sdiff(1) or
+# Teamware's filemerge tool.
+#
+sdiff_to_html()
+{
+ diff -b $1 $2 > /tmp/$$.diffs
+
+ TNAME=$3
+ TPATH=$4
+ COMMENT=$5
+
+ #
+ # Now we have the diffs, generate the HTML for the old file.
+ #
+ $AWK '
+ BEGIN {
+ printf "function sp(n) {for (i=0;i%%4d %%s\\n\", NR, $0}\n"
+ printf "function changed() "
+ printf "{printf \"%%4d %%s\\n\", NR, $0}\n"
+ printf "function bl() {printf \"%%4d %%s\\n\", NR, $0}\n"
+}
+ /^/ {next}
+ /^---/ {next}
+
+ {
+ split($1, a, /[cad]/) ;
+ if (index($1, "a")) {
+ if (a[1] == 0) {
+ n = split(a[2], r, /,/);
+ if (n == 1)
+ printf "BEGIN\t\t{sp(1)}\n"
+ else
+ printf "BEGIN\t\t{sp(%d)}\n",\
+ (r[2] - r[1]) + 1
+ next
+ }
+
+ printf "NR==%s\t\t{", a[1]
+ n = split(a[2], r, /,/);
+ s = r[1];
+ if (n == 1)
+ printf "bl();printf \"\\n\"; next}\n"
+ else {
+ n = r[2] - r[1]
+ printf "bl();sp(%d);next}\n",\
+ (r[2] - r[1]) + 1
+ }
+ next
+ }
+ if (index($1, "d")) {
+ n = split(a[1], r, /,/);
+ n1 = r[1]
+ n2 = r[2]
+ if (n == 1)
+ printf "NR==%s\t\t{removed(); next}\n" , n1
+ else
+ printf "NR==%s,NR==%s\t{removed(); next}\n" , n1, n2
+ next
+ }
+ if (index($1, "c")) {
+ n = split(a[1], r, /,/);
+ n1 = r[1]
+ n2 = r[2]
+ final = n2
+ d1 = 0
+ if (n == 1)
+ printf "NR==%s\t\t{changed();" , n1
+ else {
+ d1 = n2 - n1
+ printf "NR==%s,NR==%s\t{changed();" , n1, n2
+ }
+ m = split(a[2], r, /,/);
+ n1 = r[1]
+ n2 = r[2]
+ if (m > 1) {
+ d2 = n2 - n1
+ if (d2 > d1) {
+ if (n > 1) printf "if (NR==%d)", final
+ printf "sp(%d);", d2 - d1
+ }
+ }
+ printf "next}\n" ;
+
+ next
+ }
+ }
+
+ END { printf "{printf \"%%4d %%s\\n\", NR, $0 }\n" }
+ ' /tmp/$$.diffs > /tmp/$$.file1
+
+ #
+ # Now generate the HTML for the new file
+ #
+ $AWK '
+ BEGIN {
+ printf "function sp(n) {for (i=0;i%%4d %%s\\n\", NR, $0}\n"
+ printf "function changed() "
+ printf "{printf \"%%4d %%s\\n\", NR, $0}\n"
+ printf "function bl() {printf \"%%4d %%s\\n\", NR, $0}\n"
+ }
+
+ /^/ {next}
+ /^---/ {next}
+
+ {
+ split($1, a, /[cad]/) ;
+ if (index($1, "d")) {
+ if (a[2] == 0) {
+ n = split(a[1], r, /,/);
+ if (n == 1)
+ printf "BEGIN\t\t{sp(1)}\n"
+ else
+ printf "BEGIN\t\t{sp(%d)}\n",\
+ (r[2] - r[1]) + 1
+ next
+ }
+
+ printf "NR==%s\t\t{", a[2]
+ n = split(a[1], r, /,/);
+ s = r[1];
+ if (n == 1)
+ printf "bl();printf \"\\n\"; next}\n"
+ else {
+ n = r[2] - r[1]
+ printf "bl();sp(%d);next}\n",\
+ (r[2] - r[1]) + 1
+ }
+ next
+ }
+ if (index($1, "a")) {
+ n = split(a[2], r, /,/);
+ n1 = r[1]
+ n2 = r[2]
+ if (n == 1)
+ printf "NR==%s\t\t{new() ; next}\n" , n1
+ else
+ printf "NR==%s,NR==%s\t{new() ; next}\n" , n1, n2
+ next
+ }
+ if (index($1, "c")) {
+ n = split(a[2], r, /,/);
+ n1 = r[1]
+ n2 = r[2]
+ final = n2
+ d2 = 0;
+ if (n == 1) {
+ final = n1
+ printf "NR==%s\t\t{changed();" , n1
+ } else {
+ d2 = n2 - n1
+ printf "NR==%s,NR==%s\t{changed();" , n1, n2
+ }
+ m = split(a[1], r, /,/);
+ n1 = r[1]
+ n2 = r[2]
+ if (m > 1) {
+ d1 = n2 - n1
+ if (d1 > d2) {
+ if (n > 1) printf "if (NR==%d)", final
+ printf "sp(%d);", d1 - d2
+ }
+ }
+ printf "next}\n" ;
+ next
+ }
+ }
+ END { printf "{printf \"%%4d %%s\\n\", NR, $0 }\n" }
+ ' /tmp/$$.diffs > /tmp/$$.file2
+
+ #
+ # Post-process the HTML files by running them back through $AWK
+ #
+ html_quote < $1 | $AWK -f /tmp/$$.file1 > /tmp/$$.file1.html
+
+ html_quote < $2 | $AWK -f /tmp/$$.file2 > /tmp/$$.file2.html
+
+ #
+ # Now combine into a valid HTML file and side-by-side into a table
+ #
+ print "$HTML$STDHEAD"
+ print "$WNAME Sdiff $TPATH "
+ print ""
+ print "$TPATH/$TNAME
"
+ print "Print this page"
+ print "$COMMENT
\n"
+ print ""
+ print ""
+
+ strip_unchanged /tmp/$$.file1.html
+
+ print " | "
+
+ strip_unchanged /tmp/$$.file2.html
+
+ print " | "
+ print "
"
+ print ""
+
+ framed_sdiff $TNAME $TPATH /tmp/$$.file1.html /tmp/$$.file2.html \
+ "$COMMENT"
+}
+
+
+#
+# framed_sdiff
+#
+# Expects lefthand and righthand side html files created by sdiff_to_html.
+# We use insert_anchors() to augment those with HTML navigation anchors,
+# and then emit the main frame. Content is placed into:
+#
+# $WDIR/DIR/$TNAME.lhs.html
+# $WDIR/DIR/$TNAME.rhs.html
+# $WDIR/DIR/$TNAME.frames.html
+#
+# NOTE: We rely on standard usage of $WDIR and $DIR.
+#
+function framed_sdiff
+{
+ typeset TNAME=$1
+ typeset TPATH=$2
+ typeset lhsfile=$3
+ typeset rhsfile=$4
+ typeset comments=$5
+ typeset RTOP
+
+ # Enable html files to access WDIR via a relative path.
+ RTOP=$(relative_dir $TPATH $WDIR)
+
+ # Make the rhs/lhs files and output the frameset file.
+ print "$HTML$STDHEAD" > $WDIR/$DIR/$TNAME.lhs.html
+
+ cat >> $WDIR/$DIR/$TNAME.lhs.html <<-EOF
+
+
+
+
+ $comments
+ EOF
+
+ cp $WDIR/$DIR/$TNAME.lhs.html $WDIR/$DIR/$TNAME.rhs.html
+
+ insert_anchors $lhsfile >> $WDIR/$DIR/$TNAME.lhs.html
+ insert_anchors $rhsfile >> $WDIR/$DIR/$TNAME.rhs.html
+
+ close=''
+
+ print $close >> $WDIR/$DIR/$TNAME.lhs.html
+ print $close >> $WDIR/$DIR/$TNAME.rhs.html
+
+ print "$FRAMEHTML$STDHEAD" > $WDIR/$DIR/$TNAME.frames.html
+ print "$WNAME Framed-Sdiff " \
+ "$TPATH/$TNAME " >> $WDIR/$DIR/$TNAME.frames.html
+ cat >> $WDIR/$DIR/$TNAME.frames.html <<-EOF
+
+