ref: cb5a3fb8adad1c7f32d4d7ea26f01fa7078829ea dir: /bin/sm2cinadd/
#!/bin/rc diff <{ls *.pdf | sort} <{awk '{print $5}' db0 | sort} || sed -n '/^[0-9]/d;s/< /2.5 0 0 0 /p'