CHANGES


Summary of Changes from Zoo version 1.51 to version 2.0.

   - New modifiers to the list commands permit several new output
     formats.

   - Timezones are handled.

   - A bug was fixed that had made it impossible to individually update
     comments for a file whose name did not correspond to MS-DOS format.

   - The shared library on the **IX PC can be used.

   - VAX/VMS is now supported reasonably well.

   - A comment may now be attached to the archive itself.

   - Extracted files can optionally be forced to overwrite existing
     read-only files.

   - Extracted files will not overwrite newer existing files unless
     specifically requested.

   - File attributes (lowest nine mode bits) are preserved for **IX
     systems.

   - Multiple generations of the same file are supported.

   - Zoo will now act as a pure compression or uncompression filter on a
     single input data stream.

   - A bug was fixed that could cause removal of a directory link by the
     superuser.

   - The ability of Zoo to recover data from damaged archives is greatly
     improved.


Summary of Changes from Zoo version 2.00 to version 2.01.

   - A bug was fixed that had caused the first generation of a file to
     sometimes unexpectedly show up in archive listings.

   - A bug was fixed that had caused the MS-DOS version to silently skip
     extracting files for which there was not sufficient disk space; an
     error message will now be given.

   - A bug was fixed that had sometimes made it impossible to
     selectively extract a file by specifying its name, even though all
     files could be extracted from the archive by not specifying any
     filenames.  This occurred when a file had been archived on a
     longer-filename system (e.g. AmigaDOS) and extraction was attempted
     on a shorter-filename system (e.g. MS-DOS).

   - A change was made that will make zoo preserve the mode (file
     protection) of a zoo archive when it is packed.  This is effective
     only if zoo is compiled to preserve and restore file attributes.
     Currently this is so only for **IX systems.

   - A bug was fixed that had caused an update of an archive to not
     always add all newer files.

   - Blanks around equal signs in commands given to "make" were removed
     from the mk* scripts for better compatiblity with more **IX
     implementations including Sun's.

                                     -- Rahul Dhesi 1988/08/25