The Tor Browser / file revision

 #!/bin/sh

 LC_ALL=C

 export LC_ALL

 test -z "$srcdir" && srcdir=.

 stat=0

 test "x$HBHEADERS" = x && HBHEADERS=`cd "$srcdir"; find . -maxdepth 1 -name 'hb*.h'`

 test "x$HBSOURCES" = x && HBSOURCES=`cd "$srcdir"; find . -maxdepth 1 -name 'hb-*.cc' -or -name 'hb-*.hh'`

 for x in $HBHEADERS $HBSOURCES; do

 	test -f "$srcdir/$x" && x="$srcdir/$x"

 	echo "$x" | grep '[^h]$' -q && continue;

 	xx=`echo "$x" | sed 's@.*/@@'`

 	tag=`echo "$xx" | tr 'a-z.-' 'A-Z_'`

 	lines=`grep "\<$tag\>" "$x" | wc -l | sed 's/[ 	]*//g'`

 	if test "x$lines" != x3; then

 		echo "Ouch, header file $x does not have correct preprocessor guards"

 		stat=1

 	fi

 done

 exit $stat