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README.X1
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1994-04-02
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AMIGA gzip124x1.lha and gzip124x1.zip archive notes
==========================================================
April 2, 1994
<John.Bush@East.Sun.COM>
----------------------------------------------------------
This is the RE-distributed gzip executable, version 1.2.4,
for Amiga. It is being redistributed due to a bug in the
previous distribution (see below).
Provided here is the "gzip" utility command only.
(no "gunzip", "gzcat", or unix shell scripts included)
The gzip command can be linked or duplicated on your system
to produce the gzcat and gunzip commands, if desired.
Otherwise, command line options passed to gzip can
provide that functionality. For example, "gzip -d"
is equivalent to "gunzip".
----------------------------------------------------------
In conformance with the GNU license, source code is
widely available for this product. The master repository
is accessible via anonymous ftp at:
prep.ai.mit.edu:/pub/gnu
The gzip code will normally be named, "gzip-m.r.p.tar.Z",
where the "m.r.p" indicates the current released "major",
"revision", and "patch" level number.
Also, see the README and COPYING files in this archive for
more information.
The BUG reporting procedure is outlined in the README file.
----------------------------------------------------------
BUG ALERT ! Previous distributions, called "gzip124x.lha"
or "gzip124x.zip", compiled with SAS/C version 6.51, have
a serious bug, seemingly caused by the compiler (but still
uncertain at the date of this note). Although that version
is able to properly decompress files without error, it creates
corrupt archives when compresseing files. This is not detected
until the archive is attempted to be decompressed. The error
is manifested by a "CRC error" during decompression.
NOTE: Sometimes, CRC errors are valid, meaning that the file
was corrupted during transfer, but in THIS CASE, the gzip
produced the corruption.
Compiling with an earlier release of SAS/C, version 6.3,
solved the problem. At the time of this release, I am
attempting to track down and duplicated the compiler problem
that caused this error, so I can report it to the SAS
Institute. Currently, it is very difficult to isolate the
problem because the code produced no enforcer hits, and
executed properly. Only upon decompression does the
error become observed.
----------------------------------------------------------
The enclosed version of gzip does not work properly
on Amigas running Workbench 1.3 (Kickstart less than 36).
This is because of the lack of the ROM entrypoint, Examine_FH,
used by the fstat() call in gzip.
This will be corrected in a later version.
For now, use standard output to pass files from gzip, as follows:
(substitute your root filename in place of "filename" below)
gzip >filename -dc filename.gz
or
gzip >filename.gz -c filename
----------------------------------------------------------