Where to add Pre Reboot/halt script

[chudy]

where do we add a pre reboot/halt script?
or perhaps stop services before reboot/halt?

an option is hacking some system.inc/related files but I'm sure theres a better way of doing this.

[jimp]

There isn't a good place to do it, but you could always write a single script and then make sure it gets called before the shutdown command in all cases: /etc/rc.halt, /etc/rc.reboot, and /etc/rc.shutdown