#! /bin/sh
# accume
# concat files into last name, inclusive

trap 'rm -f tttt; exit 1'  2 3  #  interrupt, quit 
i=1
cat /dev/null > tttt
for f in $* 
do
 if ( test $i -eq $# )
 then
    catfile=$f
    touch f
 fi
 cat $f >> tttt
 i=`expr $i + 1`
done
mv -f  tttt $catfile