On Tue, Jul 10, 2001 at 02:24:57AM -0700, Ben Escoto wrote: > > About two weeks ago I asked about a way to use rsync to backup (I > wanted to make something in-between a mirror and an incremental > backup). I wrote a preliminary version of a program that does this > (see http://www.stanford.edu/~bescoto/rdiff-backup), and am now > considering adding remote filesystem support through ssh the way rsync > does. > > Conceptually this may not be too hard, but there are probably > issues that will arise that I don't foresee now. So if anyone knows > of a description of how rsync does the ssh/rsh client/server bit, or > maybe something more generic on how to use ssh in the way rsync does, > I would appreciate a reference. I could look at the rsync source, but > it doesn't seem to be overly commented, and I'm not exactly fluent in > C and thought that this post might save me time in any event. Thanks. All that rsync uses ssh for is to open a bi-directional data pipe and run a command (another rsync program) on the remote side. It then ignores ssh (or rsh, the default) and does its own protocol over the pipe between the two sides. - Dave Dykstra
