Current Patch Level: 481
Date: April 17, 2023

2.11 BSD
============
NOTE --
        This would have been the third release of 2.10BSD; but since
        the filesystem has changed and a coldstart is required
        this release was instead called: 2.11BSD

        Work on this release has been on going since the initial
        release of 2.10.1BSD in January 1989.  This release, 
        is in celebration of the 20th anniversary of the PDP-11.
        
        This release incorporates all fixes and changes posted
        to the group comp.bugs.2bsd on the newsnet since 2.10.1BSD
        was released.

        Present in this release are several more missing pieces
        from the 4.3BSD distribution:

                1) the kernel logger (/dev/klog)

                2) the namei cache

                3) readv(2)/writev(2) as system calls rather than 
                   emulation/compatibility routines

                4) the shadow password implementation released for 4.3BSD

                5) a TMSCP (TK50/TU81) driver with standalone support 
                   (bootblock and standalone driver)

                6) a couple more network drivers have ported or made to
                   work:  if_vv and if_acc

                7) the portable ascii archive file format (ar(1), ar(5)) has 
                   been implemented.

                8) last, but most importantly, long filenames!  
                
                   This last is the reason a coldstart kit is necessary.  The 
                   on-disc directory structure has been ported from 4.3BSD 
                   (along with the utilities that know about on-disc
                   directories via the raw filesystem: fsck, ncheck, icheck, 
                   dcheck, etc.) and is not compatible with previous versions
                   of UNIX for the PDP-11.  A limited amount of backward
                   compatibility is present in a version of dump(8) which
                   can read old filesystems.  restor(8) automagically converts
                   old dump tapes to the new format on input.

                   MAXNAMLEN is now 63 instead of 14.  It is possible the
                   limit could be higher, but with MAXPATHLEN at 256 a
                   MAXNAMLEN of 63 was judged sufficient.

        MANY other fixes and changes have also been made, see the
        "Changes To The System" document which describes the changes
        made to both the kernel and the application programs.

        Steven M. Schultz
        sms@2bsd.com
 

        Below is the original VERSION file distributed with 2.10.1BSD
-----------------------------------------------------------------------
NOTE --
        This is the second release of 2.10BSD; most of the changes
        are part of the addition of supervisor space networking in
        the kernel, although there are other changes.

        To give some idea of the dates involved, distribution of
        2.10BSD by the USENIX Assoc. started in fall of 1987.
        Distribution of this source started in January of 1989.

Keith Bostic
Casey Leedom
Cyrus Rahman
Steven Schultz