Thanks a lot Matt. I understood everying now. :-) On Wed, Dec 17, 2008 at 4:55 AM, Matt McCutchen <m...@mattmccutchen.net>wrote:
> On Mon, 2008-12-15 at 10:14 +0530, Jignesh Shah wrote: > > I am trying to see the rsync source code. I could see that there are > > main three processes: I realize that Server or Client becomes Sender > > or Receiver based on arguments provided. > > > 1. What is the roll of deamon process. How it different from server? > > Does it run always on remote machine? When I do rsync from client how > > remote deamon/server will get triggered? > > In the context of rsync, the server is simply the rsync process that is > accessed on the user's behalf to handle one end of the transfer: the > remote end if there is one, or otherwise (arbitrarily) the destination. > A daemon is a server with some extra features controlled by a > configuration file: it limits clients to accessing areas of the > filesystem defined as "modules", and it can optionally listen on a port > for any number of client connections (which it handles individually). > > An rsync client can fork a server locally, invoke a plain server over > remote shell, connect to a listening daemon, or invoke a single-use > daemon over remote shell. In the last two cases, rsync carries out a > "daemon protocol" before the main transfer protocol begins. > > (Now that I've taken the time to write a complete, concise explanation, > maybe it will eventually find its way into my revised man page.) > > > 2 .Where the arguments are being set. I cannot see any of > > arguments(like am_server, am_deamon etc) is being set anywhere. > > They are set from the --daemon and --server command-line arguments. > "git grep" is your friend: > > rsync $ git grep -E -n 'am_(server|daemon) =' > cleanup.c:110: am_server = 2; > clientserver.c:773: am_server = 1; /* Don't let someone try to be > tricky. */ > options.c:79:int am_server = 0; > options.c:100:int am_daemon = 0; > options.c:1305: am_server = 1; > options.c:1386: am_daemon = 1; > pipe.c:135: am_server = 1; > > -- > Matt > >
-- Please use reply-all for most replies to avoid omitting the mailing list. To unsubscribe or change options: https://lists.samba.org/mailman/listinfo/rsync Before posting, read: http://www.catb.org/~esr/faqs/smart-questions.html
