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tar 1.11.8, cygwin32 B17.1: Problem with remote tapes and ':' in filenames.


An inappropriate parsing of a WIN32 filespec containing a ':' results in
uncovering a bug in '__rmt_open' of 'src/rtapelib.c'.  In line 311,
'remote_user' is dereferenced without first checking to see if it was
specified by the invocation of 'tar'.  In such a case, 'remote_user' is
still set to NULL (line 282), and an exception occurs when trying to
read location 0.

With respect to cygwin32, the '_remdev' macro in 'rmt.h' presumes that,
if a filespec contains a colon not preceeded by a slash, it is a remote
filename.  This is an inadequate check for the WIN32 environment, where
"__rmt_path == (Path + 1) && isalpha((Path[0])) && (__rmt_path[1] == '/'
|| __rmt_path[1] == '\\') " should also be checked.

The only apparent workaround, without something like the above patch, is
to specify '--force-local' on all 'tar' command lines which might
potentially contain a drive letter (unpleasant, and should be
unnecessary, though an appropriate shell alias would help).

Victor J. Griswold, D.Sc.
Aironet Wireless Communications, Inc.
voice:	330-664-7987
fax:	330-664-7301
email:	(MS-Mail) vgris@aironet.com
	(MIME) Victor.Griswold@pobox.com

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