trap "rm -f /tmp/$$; exit 0" 0 1 2 15 a="`who am i`" a=`expr "$a" : '\([^ ]*\)'` echo ''Broadcast Message from $a ''>/tmp/$$ cat>>/tmp/$$ who^sed -e 's/^[^ ]* *\([^ ]*\).*/cat \/tmp\/'$$' >\/dev\/\1 \&sleep 2/' | sh sleep 30