#!/bin/sh
LC_ALL=C
export LC_ALL
a="sed"
i=1
while [ $i -lt 256 ]; do
	if [ $i -lt 32 -o $i -ge 127 ]; then
		oct="`printf %03o $i`"
		char="`printf \\\\$oct`"
		a="$a -e 's/$char/\\\\\\\\$oct/g'"
	fi
	i=`expr $i + 1`
done
# bash and dash differ here: bash creates double backslashes, dash single
echo "$a"|sed 's/\\\\\\\\/\\\\/g'