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Annotation of embedaddon/rsync/rsyncsh.txt, revision 1.1.1.1

1.1       misho       1: rsyncsh
                      2: Copyright (C) 2001 by Martin Pool
                      3: 
                      4: This is a quick hack to build an interactive shell around rsync, the
                      5: same way we have the ftp, lftp and ncftp programs for the FTP
                      6: protocol.  The key application for this is connecting to a public
                      7: rsync server, such as rsync.kernel.org, change down through and list
                      8: directories, and finally pull down the file you want.
                      9: 
                     10: rsync is somewhat ill-at-ease as an interactive operation, since every
                     11: network connection is used to carry out exactly one operation.  rsync
                     12: kind of "forks across the network" passing the options and filenames
                     13: to operate upon, and the connection is closed when the transfer is
                     14: complete.  (This might be fixed in the future, either by adapting the
                     15: current protocol to allow chained operations over a single socket, or
                     16: by writing a new protocol that better supports interactive use.)
                     17: 
                     18: So, rsyncsh runs a new rsync command and opens a new socket for every
                     19: (network-based) command you type.
                     20: 
                     21: This has two consequences.  Firstly, there is more command latency
                     22: than is really desirable.  More seriously, if the connection cannot be
                     23: done automatically, because for example it uses SSH with a password,
                     24: then you will need to enter the password every time.  We might even
                     25: fix this in the future, though, by having a way to automatically feed
                     26: the password to SSH if it's entered once.