Where can I find "savelog" used by init script "bootlogd"

Hi Experts.

Package "sysvinit" introduced an init script "bootlogd" while it used "savelog" as:
"savelog -p -c 5 boot > /dev/null 2>&1" in its "stop" function. I wonder where can I get such a tool/script? Which package I need to build?

Thanks
Xiao