TOOLS
	This directory contains various tools of use in reading
and pulling apart programs from the VAX SIG tapes (and from other
sources).
	There are several categories. The first are tape copiers.
Programs TCOPY.* and TCPY*.* are for tape to tape copies, format
indepentdent. TCOPY is for VAX, native mode, where TCPY is for
RSX or compat mode VMS. These programs just copy one foreign
mounted tape to another, independent of tape format. They will
handle block sizes too large for ANSI tape, so are more useful for
this than the COPY command.
	Second are tape-disk-tape copy programs. These are for use
where you want to do image tape copies with one tape drive, or where
you want to make lots of copies of a tape. They create container files
on disk of all data on a tape, or write the container files to a tape
which is then identical to the original tape. The tapes must be
mounted foreign.
	BIGTPC is the RSX copy program. Use it on PDP11; not on VAX.
VMSTPC is the VMS version. Use it on VMS. Both do several asynchronous
QIO$s and are AST driven, thus extremely fast. The PDP11 version will
handle tape block sizes up to 11,000 bytes; the VAX version will handle
tape blocks up to 32766 bytes (due to RMS limitations). Due to their
great speed, they are better for copying one tape to many if you
have the disk space needed for the container files.

	Next are the LZW compress and decompress programs. These are
compatible with Ui*x Compress also. They are used to compress files
or decompress them. The executables supplied should work OK on all
current VMS versions. The sources have a newly-fatal bug in that
when conditioned for VMS they do a realloc on a memory area that
was not the result of a malloc in the first place. This is easily
fixed (and will be when the current .EXE's stop working), but the
.EXE's here are linked with the object libraries for the old C runtime
which treated this realloc as a malloc and did the right thing.
	If you have a file from a un*x system with .Z at the end, it
is generally compressed; use LZDCM to decompress it. Frequently Un*x
sites compress TAR images on disk. The practice in VMS land is to
use LZCMP on VMS Backup savesets. Same idea; different tools.

	This leads us to the last group of tools, the TAR read and write
utilities. These can read or write Un*x TAR format tapes or disk
files, and can be used to pull tar disk images apart on VMS.

	VMS TAR tape readers and writers

These are the TAR handlers you should generally use!
They will read TAR tapes into a directory, creating subdirectories
as needed and massaging filenames to be legal in VMS V4.x.
TARREAD Usage:

$mount/foreign/block=10240/record=512 mta0: tape tape
$assign mta0: tape		
$tarrdr:==$<somewhere>TARREAD
$tarread -xv

The tape will be read and files moved to a VMS directory tree starting
in your current directory tree. Tapes with blocks up to 10240 can be
read as is. The file can easily be edited to read larger tapes.

TARWRITE usage:

Mount the tape the same as for TARREAD.
Assign the logical TAPE to it.
Define TARWRITE symbol to run TARWRITE

$tarwrite -cv [filespec,filespec,,,]
 e.g.
 $tarwrite -cv [...]*.*
  to write a tree to tape in TAR format.