NAME

       rdiff - compute and apply signature-based file differences

SYNOPSYS

       rdiff [options] signature old-file signature-file

       rdiff [options] delta signature-file new-file delta-file

       rdiff [options] patch old-file delta-file new-file

USAGE

       You  can  use  rdiff  to  update  files,  much like rsync does.  However, unlike rsync, rdiff puts you in
       control.  There are three steps to updating a file:  signature,  delta,  and  patch.  Use  the  signature
       subcommand  to  generate a small signature-file from the old-file. Use the delta subcommand to generate a
       small delta-file from the signature-file to the new-file. Use the patch subcommand to  apply  the  delta-
       file to the old-file to regenerate the new-file.

DESCRIPTION

       In  every case where a filename must be specified, - may be used instead to mean either standard input or
       standard output as appropriate.  Be aware that if you do this, you'll need to terminate your options with
       -- or rdiff will think you are passing it an empty option.

RETURN VALUE

       0  for  successful  completion,  1 for environmental problems (file not found, invalid options, IO error,
       etc), 2 for a corrupt file and 3 for an internal error or unhandled situation in librsync or rdiff.

SEE ALSO

       librsync(3)

AUTHOR

       Martin Pool <mbp@sourcefrog.net>

       The original rsync algorithm was discovered by Andrew Tridgell.

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

                                                     $Date$                                             rdiff(1)