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diff --git a/nuttx/tools/indent.sh b/nuttx/tools/indent.sh
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+#!/bin/sh
+############################################################################
+# tools/indent.sh
+#
+#   Copyright (C) 2008, 2010 Gregory Nutt. All rights reserved.
+#   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
+#
+# 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. Neither the name NuttX nor the names of its contributors may be
+#    used to endorse or promote products derived from this software
+#    without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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
+# COPYRIGHT OWNER 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.
+#
+############################################################################
+#
+# This script uses the Linux 'indent' utility to re-format C source files
+# to match the coding style that I use.  It differs from my coding style in that
+#
+# - I normally put the trailing */ of a multi-line comment on a separate line,
+# - I usually align things vertically (like '=' in assignments),
+# - indent puts a bogus blank line at the top of the file,
+# - I don't like the way it handles nested conditional compilation intermixed with code.
+#
+
+# Constants
+
+options="-nbad -bap -bbb -nbbo -nbc -bl -bl2 -bls -nbs -cbi2 -ncdw -nce -ci2 -cli0 -cp40 -ncs -nbfda -nbfde -di1 -nfc1 -fca -i2 -l80 -lp -ppi2 -lps -npcs -pmt -nprs -npsl -saf -sai -sbi2 -saw -sc -sob -nss -nut"
+
+usage="USAGE: $0 <in-file> <out-file>"
+
+# Inputs
+
+infile=$1
+outfile=$2
+
+# Verify inputs
+
+if [ -z "$infile" ]; then
+    echo "Missing <in-file>"
+    echo $usage
+    exit 1
+fi
+
+if [ ! -r $infile ]; then
+    echo "Readable $infile does not exist"
+    exit 1
+fi
+
+if [ -z "$outfile" ]; then
+    echo "Missing <out-file>"
+    echo $usage
+    exit 1
+fi
+
+if [ -f $outfile ]; then
+    echo "Removing old $outfile"
+    rm $outfile || { echo "Failed to remove $outfile" ; exit 1 ; }
+fi
+
+# Perform the indentation
+
+indent $options $infile -o $outfile
+
+