sysutils/cpdup 5.4.0p0 OpenBSD

The cpdup utility makes an exact mirror copy of the source in the destination, creating and deleting files and directories as necessary. UTimes, hardlinks, softlinks, devices, permissions, and flags are mirrored. By default, cpdup asks for confirmation if any file or directory needs to be removed from the destination and does not copy files which it believes to have already been synchronized (by observing that the source and destination files' sizes and mtimes match). cpdup does not cross mount points in either the source or the destination. As a safety measure, cpdup refuses to replace a destination directory with a file.

It is a port of the cpdup utility from DragonFly BSD.