ReadMe for extar.c, Copyright 1996 Alun Jones, auj@aber.ac.uk

You may copy, modify, hack apart and distribute extar.c freely. I take no
responsibility for any loss or damage caused by its use or misuse.

extar.c: a tar extractor for Unix which knows about RISC OS filenames.

You can control its handling of filenames by setting two environment
variables:

ARCSWAP
    This contains a colon separated list of directory names which should be
    swapped for files. That sentence probably doesn't make much sense, so
    here's an example:

	If ARCSWAP = "c:s:tmp" then

	RISC OS           Unix
	=======           ====
	wibble.c.fred  -> wibble/fred.c
	tmp.wibble     -> wibble.tmp
	s.fred         -> fred.s

	The default value (you can change it in the sources) is

	ARCSWAP="a:c:f:h:i:l:o:p:s:y:w:vim:info"

ARCDOT
    This contains a colon separated list of filenames which should be
	combined with their directory name to make a dot-extension. This is used
	mainly by *TeX. Again, an example makes it clearer (I hope):

	If ARCDOT = "tex:dvi:eps" then

	RISC OS            Unix
	=======            ====
	wibble.fred.tex -> wibble/fred.tex
	fred.dvi        -> fred.dvi
	wibble.fred.eps -> wibble/fred.eps

	The default value (again specified in the sources) is

	ARCDOT="txt:tex:dvi:eps:ps:bib:sty:bst:log:blg:aux:bbl:lof:lot:toc"

Nothing in the sources requires anything more complex than an ANSI C
compiler, plus the "mkdir" system call. So it should compile on any Unix.
I also use it regularly on Windows NT.

If you have any questions or bug fixes, please let me know.

