v='z1.tmp z2.tmp'
echo TEST >$v
echo 'z1.tmp:' `cat 'z1.tmp' 2>/dev/null; echo $?`
echo 'z2.tmp:' `cat 'z2.tmp' 2>/dev/null; echo $?`
echo '"z1.tmp z2.tmp":' `cat 'z1.tmp z2.tmp' 2>/dev/null; echo $?`
rm z*.tmp