I'm rotating log files with `logrotate` with `copytruncate`, and I need to run a script with the new filename as argument. I understand I can use `$1` within `postrotate`, but that gives me the name of the rotated file - not the one with the date extension.

So basically I have:

`/var/log/myapp/server.log`

When I run this logrotate config:

```
/var/log/myapp/server.log {
  copytruncate
  rotate 1008
  dateext
  dateformat -%s
  create 660 syslog syslog
  postrotate
    python3 /opt/myapp/test.py $1 > /dev/null
  endscript
}

```

I get

```
/var/log/myapp/server.log <-- (now empty)
/var/log/myapp/server.log-1536844088

```

Can I run a script on `/var/log/myapp/server.log-1536844088` in postrotate somehow?