🚀 go-pugleaf

Larry Blische noticed that a strings on the Compression.tool executable
in /usr/lib/NextStep/Workspace.app/WM.app turns up things like
/usr/ucb/uncompress and /usr/ucb/compress.  So, if I replace those with
the gzip executable, it should "just work".

Well, it does!  It just works.  Workspace now works with both the old
.Z files and new gzip-made .Z files, and will use gzip for the Compress
menu item.  (gzip was written to replace compress, and works the same
way with the same command structure and recognition of the command name
for determining what to do, and it can uncompress old .Z files.)

And guess what?  Installer.app works with gzip files now too!  I took
a .pkg I had laying around, and decompressed the .tar.Z file and
recompressed it using gzip.  It was still a .tar.Z file, but now
was 23K instead of 42K.  I opened the package, and installed it with
Installer, and it worked.

It just works.

I have uploaded gzip081.tar.Z to pub/next/submissions on sonata.  It
is the source code to gzip 0.81.  Don't worry about the version number--
the code is very stable at this point.  Soon GNU will switch to gzip
for software distribution.

I have also uploaded gzip081-bin30.tar.Z.  It is gzip compiled under
NeXTstep 3.0, and it's associated documentation and other shell commands.
If you want to replace Unix uncompress for Workspace and Installer, do
this as root:

     mv gzip /usr/ucb/uncompress
     ln /usr/ucb/uncompress /usr/ucb/zcat

This only extends the functionality of uncompres and zcat--both they
and Workspace and Installer will still work on old .Z files.  The only
difference is that they will now also work on gzip-made .Z files.

If you also want to replace compress so that the Workspace Compress
menu item used gzip instead of the old Unix compress (for much better
compression), then also do this:

    mv /usr/ucb/compress /usr/ucb/compress.old
    ln /usr/ucb/uncompress /usr/ucb/compress

You can reverse the above step with:

    mv /usr/ucb/compress.old /usr/ucb/compress

and you can reverse the step that preceded that with:

    ln /usr/ucb/compress /usr/ucb/uncompress
    ln /usr/ucb/compress /usr/ucb/zcat

Now, if properly noted to people who ftp to sonata, sonata can be
recompressed with gzip.

Mark Adler
madler@cco.caltech.edu