net/librsync 2.3.4 OpenBSD

librsync implements the rolling-checksum algorithm of remote file synchronization that was popularized by the rsync utility. This algorithm transfers the differences between 2 files without needing both files on the same system.

librsync is for building other programs that transfer files as efficiently as rsync. You can use librsync in a program you write to do backups, distribute binary patches to programs, or sync directories to a server or between peers.

librsync does not implement the rsync wire protocol or network functions.

This tree also produces the rdiff command-line tool that exposes the key operations of librsync: generating file signatures, generating the delta from a signature to a new file, and applying the delta to regenerate the new file given the old file.