Release Notes: dbsrv
Last Update  : 02/15/91
Updated By   : Barry Meyer

Introduction:

	This file contains a breif description of the changes made the
vns database server.

Release: 1.0.1
Author : Barry Meyer
Date   : 12/13/90

    This release is the original dbsrv developed by Eric Taylor 
with a few organizational changes. The server code in this version
has not been modified.

 o The old Makefile was replaced with an Imakefile in order to place
   the server under imake control.

 o The Sybase database schema (schema.sql) is stored in sccs but is
   no longer used in this directory. 

Release: 1.0.2
Author : Barry Meyer
Date   : 12/14/90

    This version is the one I modified a couple of months ago. It
contains a few modifications for searching for page names and
speed-ups for the notebook browser.

 o Added some new requests for searching for page names within 
   notebooks. It uses the dfa library for string searching and
   comparison.

 o Added a function for quickly retriving the links on a page to
   allow the notebook browser to quickly retrieve this information
   and display the links in the browser.

Release: 1.0.3
Author : Barry Meyer
Date   : 12/28/90

    This version contains all of the changes that were needed to
establish the policy for dangling links.

Release: 1.0.4
Author : Barry Meyer
Date   : 12/31/90

 o Added the request REQ_BLURT_NOTE and teh associated function
   req_blurt_note() to requests.c. The purpose of this was to
   improve startup performnace of the VNS by obtaining all of
   notebook info structures at one time.

Release: 1.0.5
Author : Barry Meyer
Date   : 01/22/91

 o The command line arguments are now checked for validity. The
   database directory is checked to make sure that it is a valid
   directory, the port number is checked to make sure that it is
   a number, and the database name is check to make sure that the
   a subdirectory of the same name exists under the database
   directory.

 o The Sybase include files were separated from the dbsrv.h file
   which was include in every file. The Sybase include files were
   then included only in the files in which Sybase function are 
   used. The files that actually use Sybase function calls were
   narrowed down to two: sy_io.c and dberrhndl.c. In the future,
   this interface with Sybase will require more documentation so
   that porting to other database platforms can be accomplished.

Release: 1.1.0
Author : Barry Meyer
Date   : 02/15/91

   This version has several major changes. First, a flat-file 
back-end has been added along with the driver for Sybase. Also,
the software has been reorganized into a library and support for
the development for other backends.

 o The file dberrhndl.c was removed and the code was moved to the
   Sybase driver. This function added error and message handlers
   to Sybase. These are now added when the Sybase driver is first
   initialized.

 o The function req_validate_page was modified so that the return
   flags do not conflict with the standard srvlib return codes.

 o Authorization checking was added for client connections. Return
   flags are now returned if the database name is incorrect for if
   the author is not a valid author for the database specified. 
   This information is then process by srvlib and appropriate error
   flags are set. Also, the author id is checked to see if the
   user is "vns" (super user). If so, a flag or 1 is returned 
   indicating a super user and 0 for regular users.

 o The VNS protocol was centralized into one file (vns_proto.h).
   The resulted in the removal of the files requests.h,dbsrv_port.h,
   event_types.h, and object_types.h.

 o New events were added for author login and author logout. These 
   events are sent each time someone connects to dbsrv and diconnects
   with dbsrv. These events can then be used to monitor who is 
   using a database at any given time. In the near future, a request
   for the list of users logged will be provided.

 o The Sybase driver has a time-out loop for connecting with Sybase.
   This should allow dbsrv to be started at boot time.