Mail Archives: djgpp/2013/08/24/19:24:30
This is a port of GNU gzip 1.6 to MSDOS/DJGPP.
gzip (GNU zip) is a compression utility designed to be a replacement for
'compress'. Its main advantages over compress are much better compression
and freedom from patented algorithms.
DJGPP specific changes.
=======================
No new DJGPP specific functionality has been added.
This is a recompilation of all new features introduced with previous ports
and also available in this port:
- Gzip now fully supports long file names on those platforms where DJGPP
can access them. This means, for example, that compressing `foo.tar' on
Windows 9X will produce `foo.tar.gz', not `foo.tgz'.
For backward compatibility, Gzip knows about butchered DOS-style
extensions of compressed files even when long file names are supported.
For example, if you have `foo.tgz' and you type "gunzip foo.tar", Gzip
will find the file even on Windows 9X. Short variants of compressed
extensions are checked *after* the long ones, so Gzip will try to find
`foo.tar.gz' before `foo.tgz'.
Long file name support is checked for each file submitted to Gzip, so
it will treat each one of them in accordance with the properties of the
file system where that file resides. In other words, you can compress
files that reside on DOS and Windows file systems within a single Gzip
command.
- Gzip will no longer appear to hang when its input comes from the console
device. Previous ports would hang when the user typed "gzip -f [Enter]".
This port allows you to either interrupt the program with Ctrl-C (if you
typed that command by mistake), or type in the input and end it with a ^Z
(if you really mean to compress the text you type from the keyboard).
This is done by avoiding to switch the console device to binary mode,
so any console reads are now done in text mode.
- The default compressed file extension is now `.gz', not `z'. This is so
that compressed file names on Windows 9X would have the usual `.gz'
extension, but it also means that `foo.cc' will now be compressed into
`foo.cgz' when long file names are not supported. Use the -N option to
`gunzip' to restore the original name, if the original file name had
more than one character in the extension.
- When restoring original file names, `gunzip' now converts all characters
that are not allowed in DOS/Windows file names to similar but valid
characters, and changes the file name if it is reserved by a DOS device
driver (like `aux.text' or `prn.tar') by prepending an underscore to it.
- In previous ports, uncompressing files with certain names on Windows 9X
when numeric tails are disabled would trigger false warnings about file
name truncation. This is now fixed.
- Truncation of long file names on plain DOS is somewhat smarter now:
`gunzip' treats several additional characters (like `-' and `_') as
part delimiters.
- Shell scripts `zmore', `zgrep' and others now work on DOS and
Windows, and are distributed with the binary distribution, as are all
the man pages supplied with the official GNU sources.
- Shell script `zdiff' does not work on DOS and Windows, because it uses
subshells to invoke gzip and to generate the error code (return value)
of the command. Unfortunately this does not work with the port of bash.
All the changes done to the original distribution are documented in the
diffs file and located together with all the files needed to configure
the package (config.bat, config.sed, config.site, etc.) in the /djgpp
directory.
To build this port and run the test suite you will need LFN support.
The source package is now distributed configured for both DJGPP 2.03 and
DJGPP 2.04. In the top srcdir there is be a "_build.203" directory and a
"_build.204" directory.
For further information about GNU gzip please read the info docs and NEWS file.
This is an verbatim extract of the NEWS file:
-------------------------------------------------------------------------------
** New features
gzip now accepts the --keep (-k) option, for consistency with tools
like xz, lzip and bzip2. With this option, gzip no longer removes
named input files when compressing or decompressing.
** Bug fixes
gzip -d no longer malfunctions with certain invalid data in 'pack' format.
[bug introduced in gzip-0.8]
When overwriting, gzip no longer acts as if you typed "y" when you type "n",
on some platforms when compiled with optimization.
[bug introduced in gzip-1.3.6]
zgrep no longer malfunctions with a multi-digit context option like -15.
Now, it passes that option to grep (equivalent to -C15) just as it does
for single-digit options. [bug introduced in gzip-1.3.12]
zmore now acts more like 'more', and is more portable to POSIXish hosts.
-------------------------------------------------------------------------------
The port has been compiled using stock djdev203 (patchlevel 2) and consists
of the usual three packages that can be downloaded from ftp.delorie.com and
mirrors as (timestamp 2013-08-24):
gzip 1.6 binaries, info and man format documentation:
ftp://ftp.delorie.com/pub/djgpp/current/v2gnu/gzip16b.zip
gzip 1.6 dvi, html, pdf and ps format documentation:
ftp://ftp.delorie.com/pub/djgpp/current/v2gnu/gzip16d.zip
gzip 1.6 source:
ftp://ftp.delorie.com/pub/djgpp/current/v2gnu/gzip16s.zip
The binaries have been produced a second time using the stock version of
djdev204 beta library. This package is available at ftp.delorie.com and
mirrors as (timestamp 2013-08-24):
gzip 1.6 binaries, info and man format documentation:
ftp://ftp.delorie.com/pub/djgpp/beta/v2gnu/gzip16b.zip
Send gzip specific bug reports to <bug-gzip AT gnu DOT org>.
Send suggestions and bug reports concerning the DJGPP port
to comp.os.msdos.djgpp or <djgpp AT delorie DOT com>.
If you are not sure if the failure is really a gzip failure
or a djgpp specific failure, report it here and *not* to
<bug-gzip AT gnu DOT org>.
Enjoy.
Guerrero, Juan Manuel <juan DOT guerrero AT gmx DOT de>
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