07-22-2016
Hi.
I'll take the blame for this.
I had hoped that my quote from the
rsync man page would encourage the OP to look farther into
rsync. A more complete explanation of the workings of
rsync can be found at
rsync - Wikipedia, the free encyclopedia
If that is too difficult or does not meet the OP's requirements, then the MD5, sort, and compare steps seem reasonable to me.
Best wishes ... cheers, drl
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rdiff(1) General Commands Manual rdiff(1)
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 basis-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.
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@samba.org>
The original rsync algorithm was discovered by Andrew Tridgell.
rdiff development has been supported by Linuxcare, Inc and VA Linux Systems.
$Date: 2002/01/25 21:25:34 $ rdiff(1)