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 librsync(3)                     Martin Pool                     librsync(3)
                        $Date: 2003/06/12 06:03:32 $

      librsync - library for delta compression of streams

       #include <stdio.h>
       #include <stdlib.h>
       #include <librsync.h>

       cc ... -lrsync

      The librsync library implements network delta-compression of streams
      and files.  The algorithm is similar to that used in the rsync(1) and
      xdelta(2) programs, but specialized for transfer of arbitrary-length
      octet streams.  Unlike most diff programs, librsync does not require
      access to both of the files on the same machine, but rather only a
      short ``signature'' of the old file and the complete contents of the
      new file.

      The canonical use of librsync is in the rproxy(8) reference
      implementation of the rsync proposed extension to HTTP.  It may be
      useful to other programs which wish to do delta-compression in HTTP,
      or within their own protocol.  There are HTTP-specific utility
      functions within librsync, but they need not be used.

      A number of tools such as rdiff(1) provide command-line and scriptable
      access to rsync functions.


      rdiff and librsync Manual or


      The rsync protocol is still evolving.  There may be bugs in the
      implementation.  The interface may change in the future, but it is
      becoming more stable.

      Many routines will panic in case of error rather than returning an
      error code to the caller.  Patches to fix this are welcome, but at the
      current state of development aborting seems as useful as trusting to
      possibly-incomplete checking in the client.

      Martin Pool <>, with Andrew Tridgell <>.

                                    - 1 -       Formatted:  January 20, 2021

 librsync(3)                     Martin Pool                     librsync(3)
                        $Date: 2003/06/12 06:03:32 $

      rdiff development has been supported by Linuxcare, Inc and VA Linux

                                    - 2 -       Formatted:  January 20, 2021