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- nspark - New Spark unarchiver
- =============================
-
- THIS PROGRAM IS *FREE* -- YOU MAY DO WHAT YOU LIKE WITH IT AS LONG AS
- THIS FILE REMAINS INTACT, AND YOU DO NOT MAKE ANY MONEY FROM IT! IF
- YOU MAKE IMPROVEMENTS TO THIS PROGRAM THEN PLEASE SEND A COPY OF THE
- SOURCES TO THE MAINTAINER OF THAT VERSION OF THE PROGRAM.
-
- nspark is a rewritten version of !Spark for UNIX. The original version
- of spark (sometimes known as "cark") was based upon the BASIC program
- "bark", written by David Pilling, and was improved and fixed by the
- following people:
-
- Philip Colmer (pcolmer@acorn.co.uk),
- Alun Jones (auj@uk.ac.aber),
- Andy Duplain (duplain@rtf.bt.co.uk),
- Martin Percival (martin@thed.uk22.bull.com),
- Denis Howe (dbh@doc.ic.ac.uk).
-
- I decided to re-write the program to add functionality and make it
- easier to port to other Operating Systems (such as MSDOS and even RISC
- OS :-). The new version has the following enhancements:
-
- o Supports all archive methods used by !Spark 1 and 2. The old
- version didn't support "Squashing" and used to handle "Compressed"
- archives by using the UNIX uncompress program. The new version
- supports both these and has them built-in, allowing easier porting
- to other OS's.
-
- o Supports Cyclic Redundancy Checking (CRC). The integrity of an
- archive can now be checked without having to unarchive it.
-
- o Supports verbose option to allow archive file details to be
- displayed (time/date or exec/load address, size, type).
-
- o Supports selective file unarchiving, so the whole archive needn't
- be unarchived if not all the files are wanted).
-
- o Supports user-prompting before overwriting a file, allowing the
- user to either (1) overwrite the file, (2) overwrite all the
- files, (3) unarchive the file to a different name, or (4) not to
- unarchive the file at all.
-
- o Supports file-stamping so the date and time of the file, when
- unarchived, matches the date and time it was archived (not 4.2BSD
- or SysV.2 as these systems lack vital library functions).
-
- I have not included support for creating !Spark archives, and I am not
- really sure if I need to as: (1) !Spark for RISC OS is cheap (#5.99
- from David Pilling), (2) !SparkPlug can unpack archives created with
- zip (which is available in source form for UNIX, VMS and MSDOS), and
- (3) it's a lot of work. Let me know what you think.
-
- To compile nspark; copy the relevant makefile from the "mkfiles"
- directory, and rename it "Makefile" or "makefile", edit it to suite C
- compiler preference, change the "SYSTYPE" variable setting, etc, then
- simply type "make" (or "nmake" or "amu" or whatever).
-
- There are some problems with nspark if it is compiled with gcc v2 (it
- core dumps). To fix this try recompiling everything ("make clean"
- first) with "-O" off, and if nspark still won't work try adding
- "-fno-builtin" after "gcc" in the "CC" line, then recompile. I have
- had some strange problems with optimisation in gcc v2, for example
- basename() in misc.c core dumps (looking at the assembler gcc v2
- produced I can see why!).
-
- Please send bug reports/suggestions etc to the maintainer of the
- particular version of nspark you are using (the maintainer's e-mail
- address can be found using the -V option).
-
- Enjoy.
-
- --
- Andy Duplain, BT Customer Systems, Brighton, UK. (duplain@btcs.bt.co.uk).
- October 1992.
-