New features of SCCS-1.1: Please note that this SCCS version and all our earlier versions are based on what AT&T called SCCS-5.0. This is why the final version of this release will be called SCCS-5.1. SCCS-5.1 is a mature and highly portable variant created from the original AT&T SCCS sources as supplied by Sun Microsystems in December 2006 on my request. SCCS-5.1 introduces a few enhancements to the SCCS history file format that are all compatible with other SCCS implementations (SCCS from SCO implements a clash with the 'x' history file flag and may cause related SCCS-5.1 files to be extracted with the executabl bit on). I recommend to replace SCO SCCS by this current SCCS as SCO SCCS is based on older source code versions that is known to have other bugs. There has been a SCCS history file format change when switching from SCCS-3.0 to SCCS-4.0 on February 22 1977. Since then, the file format was kept the same. SCCS-6.0 will introduce a new SCCS history file format that causes historic SCCS implementations to abort (to prevent file corruption) but that can be easily converted back into a SCCS-5.x history file using a conversion program. This conversion will however cause a loss of information. The weave delta format as introduced by Marc J. Rochkind at Bell Labs seems to be the best way of dealing with deltas and branches and thus will be retained in SCCS-6.0. The planned enhancements for SCCS-6.0 are: - New and better checksum (this is intended to cause historic SCCS versions to abort when reading the first line already). - Introducing a global project tree related lock file to allow SCCS to support atomic updates on whole projects and not only on single files. This is why we need to cause older SCCS implementations to abort as they otherwise would ignore the global lock and modify single files from the project. - Switching all time stamps in SCCS history files and p.* files to GMT in order to make SCCS able to be used in a networked environment. Previous versions use local time for time stamps. - The ability to have compressed delta weave data will cause the SCCS history files to be typically smaller than the "gotten" release of the file. - A new "escaped delta weave" format will permit ^A to appear at the beginning of lines in text files. This format allows any file content that does not include null bytes. - A new subcommand "sccs init" will mark a project's root directory and switch SCCS into "project mode" as opposed to the historic "single file mode". - A new subcommand "sccs clone" will permit to import projects from a distributed SCCS server. - A new subcommand "sccs pull" will allow to update a private copy from the state of a distributed SCCS server. - A new subcommand "sccs push" will allow to update a distributed SCCS server from a private copy. - A new subcommand "sccs export" will export changesets as annotated patch files. - A new subcommand "sccs import" will import annotated patch files. There are only a few additional features that could turn SCCS into a distributed Source Code Control System. Please join the discussion mainling list for the development of enhancements on: http://lists.berlios.de/mailman/listinfo/sccs-devel sccs-devel@lists.berlios.de ------------ Included in Beta-1 - Several enhancements to the makefile system. - The makefile system now supports to compile using Sun Studio on Linux - -I. removed from the makefile system - The makefile system now better handles the LD_RUN_PATH property - Support for HAIKU was added - Support for AIX was added - Support for IRIX was added - Support for VMS was added - Floating point support for AIX now supports newer versions of AIX - libgetopt separated from libschily - libschily is now delivered complete - New library libfind to support sccs -R - sccs(1) now correctly calls readdir(3) to skip "." and ".." - sccs(1) now uses strsignal(3) where available - sccs(1) now supports a flag -R for recursive operation on most commands. Most subcommands now support the -R option (before the subcommand). sccs -R tell Lists all currently edited files sccs -R get Get's everytrhing from SCCS/s. files sccs -R diffs shows the diffs for all edited files sccs -R diffs ` sccs -R tell -U ` shows the diffs for all files edited by you sccs -R delget performs a "delta" and a "get" on all files currently edited sccs -R unedit removed _all_ edited files be careful! sccs -R val Lists all corrupted SCCS history files sccs -R val -T Gives more information on all corrupted SCCS history files, to help to fix them. There are more sub-commands that support -R For sub-commands that (currently) do not support recursion, the following message is printed: sccs -R admin sccs: Recursion not supported for "admin" *** Please test and report! - SCCS get and SCCS delta implement a (hidden) option -Cdir to support recursive operation with sccs(1). - SCCS get -k now works correctly even if someone previously called sccs admin -fy... - SCCS get(1) now has new keywords %d% %e% %g% %h% with 4 digit year strings sccs get ... only expands the new four digit-year keywords %d% %e% %g% %h% if the 'x' flag has been set with sccs admin or if the related keyword has been exlicitely enabled via the 'y' flag. This has been done because the probabiltiy thar lower case characters from printf() format strings incorrectly match sccs keywords is too high. - SCCS get(1) now implements the BSD-4.x keyword %sccs.include.filename% use sccs admin -fy* for selectively enabling/disabling this feature The file "filename" is searched in the path from the environment SCCS_INCLUDEPATH - On platforms without strftime(3), sccs get now correctly creates 2 digit strings for Month and Day according to the man page - SCCS prs(1) now has new keywords :d: :DY: with 4 digit year strings - sccs help now supports new help target "get_keywds" for a list with get(1) keywords - sccs help now includes help for the sccs(1) command - SCCS commands now all support -V/--version to verify the current version. - All commands now use vfork() if available in order to speed things up and in order to permit to support VMS. - SCCS now installs a "sccs" symlink to /opt/schily/bin - The sccs-admin man page is now complete - Many small enhancements of all man pages - All SCCS commands now open files using O_BINARY on platforms where this is needed - SCCS admin now supports a new flag 'x' to enable Schily specific enhancements - All SCCS commands now create 4 digit year numbers in all files in case that the related date is past January 19 2038. This is no problem as all relevant SCCS implementations have been enhanced to understand and to silently accept 4 digit year numbers in 1999. This is useful, as you need 64 bit SCCS binaries anyway in order to deal with later dates. - All SCCS code is now 64 bit clean. - All SCCS programs now link to libintl for localized strings. - SCCS "val" now supports directory type command line arguments that result in scanning the related directory for s. files. - The val(1) cmmand now includes a -T (debug) option that allows to get much better mesages when a SCCS history file is corrupted. Use: sccs val -T filename - The SCCS man pages have been enhanced in order to include the -V (retrieve program version) option. - The man page sccsfile.1 now mentiones the new 'x' flag for the enhanced SCCS keywords. - The man page for sccs.1 and val.1 now mention the -T option - Added missing directories to the SCCS package description file. - The included diff(1) command now supports wide chars - The included diff(1) command now supports the -N option - sccslog(1) now detects currupted history files - sccslog(1) now deals with very old SCCS history files (from 1980 and before) that may have no delta comment at all. - sccslog(1) now implements a (hidden) option -Cdir to support recursive operation with sccs(1). - sccs(1) now supports a new subcommand "ldiffs" to call the platform local diff(1) implementation instead of the diff implementation delivered with SCCS. - A compile variant of the SCCS system (use "smake COPTX=-DGMT_TIME") that results is a SCCS system that archives GMT based times inside the SCCS history files has been made more more robust and more correct. This compile variant has been introduced by Sun a while ago, but it was not cleanly portable and it did not work correctly when close to a DST switch time, as it abused the function localtime(), introduced math based on "timezone" and assumed that all DST variants add one hour to the winter time. The new code is based on a new function mkgmtime() that only needs to know the Gregorian calendar and based on correct usage of the POSIX time functions. The change is a preparation for a future enhancement to SCCS that will make it time zone independent. ------------ Included in Beta-2 - SCCS now checks whether the 'x' flag in the SCCS history files has the tag "SCHILY", as the SCO sccs implementation uses the x flag for setting the executable permission on files. - SCCS now warns if currently unsupported uppercase flags are present in a history file. - sccs help now includes help for all help codes - The sccsfile.4 man page now mentiones that year numbers may be 4 digit numbers also. - The sccslog(1) command now implements a new option -a to control the way sccslog collects deltas with the same delta comment in case they happen within 24 hours. Not collecting such deltas makes it easier to understand the exact time line in changes for many files that belong to a common project. sccslog -a will still collect time stamps that differ less than a minute sccslog -aa will not collect time stamps if they differ more than a second - The diff(1) command delivered with SCCS now outputs the correct time stamp format for unified diffs (-u) as required by POSIX. This is needed in order to be able to automatically remove removed files by patch(1). - The SCCS commands now switch to 4 digit year numbers in SCCS files when the year 2038 starts. This makes it easier to write shell scripts that work on SCCS files. - Since SCCS no longer uses the libc variable "timezone", a call to tzset() is no longer required. Since SCCS now switches to a 4 digit year format at the beginning of Y2038 local time, we need to call tzset() again, but we now do it in main() for each related tool. - The leap year functions did not correctly know that February 2000 has 29 days. This was a result from switching to a correct Gregorian leap year algorithm but using year-1900 as a parameter to the mosize() function. - SCCS comb now writes a shell script that has $(INS_BASE)/ccs/bin in front of PATH. - SCCS sccsdiff now has $(INS_BASE)/ccs/bin in front of PATH. - The string parsing functions now stop when encountering a null byte at the end of a line and thus no longer cause core dumps with corrupted SCCS history files. - SCCS val now checks for missing usernames in delta table lines. Missing usernames have been a frequent problem with SCCS releases until around 1982. Recent SCCS versions abort before modifying files when the username appears to be empty. - SCCS val now can check for non-monotone time stamps in SCCS history files. SCCS creates time stamps but never really uses them except when a cut-off time has been specified. Call val -T to enable this check. The exit code will not change and only a warning will be emmited in case of a non-monotonic time. - The SCCS admin command now supports a new option -o that uses the original file time for the initial delta instead of using the current time. - The SCCS delta command now wupports a new option -o that uses the original file time for the delta instead of using the current time. - The sccs command now avoids a GCC warning related to array of struct initialization. - The SCCS admin and delta man pages now mention -o - The SCCS val man page now includes a better description for the debug option -T. - The sccs.1 man page now contains an overview on the subcommands - The sccs.1 man page now mentions the new option -o for "admin" and "delta" and for related pseudo commands. SCCS now has been tested to compile and work on the following platforms: - SunOS-4.x - SunOS-5.x (Solaris 2.x, 7, 8, 9, 10, 11) - FreeBSD - HP-UX - Linux - Mac OS X - AIX - IRIX - VMS - Cygwin The portability now reached a state that should allow SCCS to compile and run on other platforms too. SCCS compiles and has been verified on all major platforms.