#!/bin/sh x=0;while true;do read a; test ${#a} -gt 0||exec echo $x a=${a#*:\*:};n=${a%%:*}; test $n -le 240||x=$((x+n)); done < /etc/passwd
#!/bin/sh IFS=:;x=0;while true;do read a b c d; test ${#a} -gt 0||exec echo $x test $c -lt 240||x=$((x+c)); done < /etc/passwd
