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000101_fdc@watsun.cc.columbia.edu_Tue Oct 30 13:12:01 EST 2001.msg
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Article: 12918 of comp.protocols.kermit.misc
Path: newsmaster.cc.columbia.edu!watsun.cc.columbia.edu!fdc
From: fdc@watsun.cc.columbia.edu (Frank da Cruz)
Newsgroups: comp.sys.hp.hpux,comp.protocols.kermit.misc
Subject: Re: transfering files securely (encryption ?)
Date: 30 Oct 2001 18:10:08 GMT
Organization: Columbia University
Lines: 51
Message-ID: <9rmqe0$ofs$1@newsmaster.cc.columbia.edu>
References: <cad82396.0110260651.423f0fd1@posting.google.com> <slrn9tsp4e.4ki.Ralf.Hildebrandt@postamt1.charite.de> <9rmbgn$b4r$1@newsmaster.cc.columbia.edu> <3BDEC762.486D2DCE@boeing.com>
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Xref: newsmaster.cc.columbia.edu comp.sys.hp.hpux:142605 comp.protocols.kermit.misc:12918
In article <3BDEC762.486D2DCE@boeing.com>,
Robert Gilster <robert.l.gilster@boeing.com> wrote:
: Frank da Cruz wrote:
: > ...
: > Good tools handle not only trivial cases but the general case as well.
: > Good file-transfer tools follow well-established principals of network
: > citizenship by not putting proprietary formats on the wire but rather,
: > always converting to a common intermediate representation for transport.
: > This includes, for text-mode file transfer, both record format and
: > character set. ...
:
: Yes but do those "Good" tools handle those above situations consistently?
:
That would be a measure of how good they are.
: I would hazard a guess that until computer system architecture converges...
:
They never will, not as long as they grow from a market economy, at least
not barring world domination by a monopoly too powerful to stop. But that's
not likely to happen.
: ... the above situations are going to give anyone heartburn.
:
They don't need to.
: What happens when programs like `tar` come into play. What
: happens to the above situations when the user decides to zip the file
: prior to transmit, then perhaps the transfer won't mangle the file (or
: perhaps it will).
:
Zip and tar archives push the problem downstream. We transfer them in
binary mode, obviously, but if you moved a DOS or Windows ZIP archive
containing a mixture of binary and text files to Unix, you're going to have
problems when you unzip it on Unix. On the other hand, if you transfer the
component files directly with a "good" tool, you won't. See, for example:
http://www.columbia.edu/kermit/ckermit3.html#x4
: The whole topic is extremely (and unnecessarily) vague.
:
I wouldn't say "unnecessarily". Diversity happens. Aggravating, and
sometimes dangerous, things happen when you ignore it. Even worse things
would happen if computer/software/file-system architectures all converged
on a single universal model.
: I guess that's no excuse to ignore the problem or throw up your
: hands and let it do what it will.
:
Or deal with it, as "good" tools do.
- Frank