People running cvsupd servers should upgrade to this new release. People running cvsup clients only do not need to upgrade, provided that they already have release 15.4. Announcing CVSup 15.4.1 ----------------------- Release 15.4.1 of CVSup, the CVS-aware network distribution system, is now available. What Has Changed Since the Previous Release? -------------------------------------------- This is a bugfix release to correct a problem in the server. Prior to this release, if a client connection was lost during a particular narrow time window, it could cause the master server to die. Manual intervention would then be required in order to restore service. No changes were made to the client in this release. Where to Get CVSup ------------------ CVSup is free software. It is available from: ftp://ftp.FreeBSD.org/pub/FreeBSD/CVSup/ and from all of the many FreeBSD FTP mirrors. You can find a complete list of them in the FreeBSD Handbook at: http://www.freebsd.org/handbook/mirrors.html CVSup is also available from the author's FTP server: ftp://ftp.polstra.com/pub/FreeBSD/CVSup/ Please avoid this server if possible. It has a rather slow link to the Internet. Full sources as well as FreeBSD binaries are available: cvsup-bin-15.4.1.tar.gz FreeBSD static binaries for the client (includes GUI) cvsup.nogui-bin-15.4.1.tar.gz FreeBSD static binaries for the client (no GUI) cvsupd-bin-15.4.1.tar.gz FreeBSD static binaries for the server cvsup-15.4.1.tar.gz Sources ** The MD5 file signatures for these files are: MD5 (cvsup-bin-15.4.1.tar.gz) = faf82eb0d8bb211e7180ed3236b76331 MD5 (cvsup.nogui-bin-15.4.1.tar.gz) = 35b582806f5c9c44327434388fbb135e MD5 (cvsupd-bin-15.4.1.tar.gz) = cc8b09d038f681992149e3abb56bb705 MD5 (cvsup-15.4.1.tar.gz) = 072dd13c0c921d4c5a41b0d178c44c5c An updated port will appear in the FreeBSD ports and packages collections soon: Ports: ftp://ftp.FreeBSD.org/pub/FreeBSD/ports-current/net/cvsup/ ftp://ftp.FreeBSD.org/pub/FreeBSD/ports-current/net/cvsup-bin/ Packages: For FreeBSD-current: ftp://ftp.FreeBSD.org/pub/FreeBSD/packages-current/net/ cvsup-15.4.1.tgz cvsup-bin-15.4.1.tgz For FreeBSD-2.2: ftp://ftp.FreeBSD.org/pub/FreeBSD/packages-stable/net/ cvsup-15.4.1.tgz cvsup-bin-15.4.1.tgz If you want SOCKS support, you must also install the "modula-3-socks" port or package: Port: ftp://ftp.FreeBSD.org/pub/FreeBSD/ports-current/lang/modula-3-socks/ Packages: ftp://ftp.FreeBSD.org/pub/FreeBSD/packages-current/lang/modula-3-socks-1.0.tgz ftp://ftp.FreeBSD.org/pub/FreeBSD/packages-stable/lang/modula-3-socks-1.0.tgz SOCKS is supported only under FreeBSD, and only with dynamically linked executables. The static binary distributions do not support SOCKS. ** If you wish to build CVSup from the sources, be sure to read the discussion further on in this announcement. Compatibility with Previous Releases ------------------------------------ This version is believed to interoperate properly with all earlier public releases of CVSup. What Is CVSup? -------------- CVSup is a software package for distributing and updating collections of files across a network. CVSup is specifically tailored to distributing CVS repositories. By taking advantage of the special properties of the files contained in CVS repositories, CVSup is able to perform updates much faster than traditional systems. It is especially valuable for people with slow Internet connections. CVSup parses and understands the RCS files making up a CVS repository. When updates occur, CVSup extracts new deltas directly from the RCS files on the server and edits them into the client's RCS files. Likewise, CVSup notes the addition of new symbolic tags to the files on the server and sends only the new tags to the client. CVSup is able to merge new deltas and tags from the server with deltas and tags added locally on the client machine. This makes it possible for the client to check local modifications into his repository without their being obliterated by subsequent updates from the server. Note: Although this feature is fully implemented in CVSup, it will probably not be practical to use it until some small changes have been made to CVS. In addition to distributing the RCS files themselves, CVSup is able to distribute specific checked-out versions. The client can specify a symbolic tag, a date, or both and CVSup will extract the appropriate versions from the server's CVS repository. Checked-out versions do not need to be stored on the server since CVSup can extract any version directly from the CVS repository. If the client has an existing checked-out tree, CVSup will apply the appropriate edits to update the tree or transform it into the requested version. Only the differences between the existing version and the desired version are sent across the network. To update non-RCS files, CVSup uses the highly efficient rsync algorithm, developed by Andrew Tridgell and Paul Mackerras. CVSup uses lightweight processes (threads) to implement a streaming protocol across the network. This completely eliminates the delays associated with the lock-step, request-reply form of communication used by many existing protocols, such as sup and NNTP. Information is transferred at the full available speed of the network in both directions at once. Network latency and server response delays are rendered practically irrelevant. CVSup uses the "zlib" compression package to optionally compress all communications. This provides an additional 65-75% compression, on top of the diff-based compression already built into CVSup. For efficiency, all processing is built into the CVSup package itself. Neither the client nor the server executes any other programs. For further information about how CVSup works, see the (somewhat out of date) "Blurb" document in the CVSup distribution. Using CVSup to Maintain FreeBSD Sources --------------------------------------- CVSup servers are currently running at about 20 mirror sites around the world. For an up-to-date list of them, see: http://www.freebsd.org/handbook/mirrors-cvsup.html Using CVSup, you can easily receive or update any of the standard FreeBSD source releases, namely, "cvs", "current", and "stable". The manual page for cvsup(1) describes how to do that. For more detailed instructions, see the section on CVSup in the FreeBSD Handbook: http://www.FreeBSD.org/handbook/cvsup.html Building CVSup from the Sources ------------------------------- CVSup is written in Modula-3, a modern, compiled, object-oriented language. Modula-3 integrates threads, exceptions, and garbage collection, providing an ideal vehicle for this sort of application. Without Modula-3, CVSup would almost certainly not exist today. If you wish to build CVSup from the sources, you will first need to install the free Modula-3 compiler and runtime libraries from DEC SRC. A port is available in the FreeBSD ports collection, in "lang/modula-3". The corresponding package is, of course, available in the packages collection. You will also need version 1.0.4 or later of the "zlib" library. In FreeBSD-2.1.6 and later releases, this library has been incorporated into the system sources, in "src/lib/libz". Prior to that, a FreeBSD port was available in "devel/libz" of the FreeBSD ports collection. For other sources of this library, see the "Install" file. Do not try to use versions earlier than 1.0.4. To build the entire system from source under FreeBSD, simply type "make" in the top-level directory. (That's the directory that has sub-directories named "client" and "server", among others.) To force the executables to be statically linked, set the environment variable "M3FLAGS" to "-DSTATIC". To build the client without the GUI (e.g., if you don't have the X Window System installed on your machine), set it to "-DNOGUI". To do both of these things, set the environment variable to "-DSTATIC -DNOGUI". The Makefiles should work on any reasonable Unix system. If you have trouble with them, it is easy to build the components manually. Simply chdir into each of the following subdirectories in the given order and type "m3build": suptcp suplib client server To build statically linked executables, add "-DSTATIC" to each "m3build" command. To build the client without the GUI (e.g., if you don't have the X Window System installed on your machine) add "-DNOGUI". Portability Issues ------------------ I intend for CVSup to be portable to most POSIX systems. Earlier releases have been run on a number of different platforms, including FreeBSD, Linux, HP-UX, SunOS, Solaris, and DEC OSF/1 ALPHA. In the current release I have attempted to increase rather than decrease portability. Anybody who succeeds in porting CVSup to other systems is encouraged to send his changes to <cvsup-bugs@polstra.com>. As long as the changes are reasonably palatable, they will be incorporated into future CVSup releases. CVSup uses several POSIX-specific functions which may make it more of an effort to port the package to non-POSIX systems such as Win32. These functions include mmap, fork, syslog, stat, and chmod, among others. Status of this Release ---------------------- CVSup was first released publicly in August of 1996. Since then it has seen heavy use, and it has been quite stable. Like all software, though, it is not perfect. Please be prepared to find bugs -- without a doubt, there are some. Please report bugs to <cvsup-bugs@polstra.com>. John Polstra, <jdp@polstra.com> Copyright 1996-1998 John D. Polstra $Id: Announce,v 1.38 1998/07/05 23:21:50 jdp Exp $ This is the moderated mailing list freebsd-announce. The list contains announcements of new FreeBSD capabilities, important events and project milestones. See also the FreeBSD Web pages at http://www.freebsd.org To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-announce" in the body of the message