Ascend Archive
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Re: (ASCEND) CRC errors

At 03:19 PM 6/2/98 +0200, Andre Beck wrote:
>On Fri, May 22, 1998 at 10:10:11PM +0200, Michiel Boland wrote:
>> Surely there must be a program somewhere that can check a
>> software image before it is loaded. :) (unless ascend use some
>> kind of proprietary compression scheme for their images) 
>
>Ascend supplies some Unix sum(1) checksums for the released binaries.
>This is of course only of limited help due to different versions of
>sum(1), its pitfalls (you can byte-swap the whole file and still get
>the same sum) and unavailability on some strange platforms.
>
>It has been pronounced repeatedly on this list that md5sum values should
>be supplied instead. I really can't imagine what's the problem...

Of course they don't provide any kind of checksums on the versions in the
/private/beta directories which are only available via http.


>BTW, if you say "downloaded with Netscape", do you mean "right mouse
>button/Save Link As..." or do you just click on the file ? The latter
>may be the real problem.

It can be a problem either way. The Ascend web server sends out files with
the .m40 extension (and others by default) as type text/html. That means
that if you click the link your browser will try to display the file. If
you try to do a "Save Link As" Netscape will still respect the data type
and helpfully convert what appear to the line endings, i.e. CR => CRLF.
Fortunately IE does the wrong thing and ignores the data type on a Save
Link As.

Using ftp through Netscape (as in following the links from www.ascend.com
to the current software) has a similar problem. Here there is no data type
sent by the server so the client makes assumptions based on the filename
extension. In this case you can configure the client to map .m40 (or
whatever) to type application/octet-stream which should get you a binary
transfer.

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