[Info-vax] difference in files being copied by scp from Unix to VMS

[Sumir]

On Apr 28, 10:42 am, "Richard B. Gilbert" <rgilber... at comcast.net>
wrote:
> Sumir wrote:
> > On Apr 28, 9:09 am, koeh... at eisner.nospam.encompasserve.org (Bob
> > Koehler) wrote:
> >> In articl03f0617$0$30920$c3e8... at news.astraweb.com>, JF Mezei <jfmezei.spam... at vaxination.ca> writes:
>
> >>> *whenVMSreceives thefile, it might tag on those extra bytes.
> >>    Most network utilities forVMSstore binary data as 512 byte records.
> >>    So if the last byte received is somewhere in the middle of the
> >>    block zero padding is added after the last data byte.
>
> >>    Many of the files thatVMStreats as binary need to be 512 byte
> >>    blocks, others don't.  Some network utilities allow the user to
> >>    control how binary data is stored (e.g. record size in the Multinet
> >>    FTP client), others don't.
>
> >>    I ran into this with an FTP binary transfer via UCX' client years
> >>    ago.  We were not able to meet the customer's original requirement
> >>    that we prove the receivedfileidentical to the remote copy, since
> >>    it wasn't.  The customer was happy that we could prove all the
> >>    bytes prior to the pad were identical, right up to the number of
> >>    bytes the remote system claimed for thefilesize.
>
> >>    It is, of course, possible to fix thefileafter receipt, just not
> >>    typically necessary to do so.  RMS keeps a value in thefileheader
> >>    which locates the last data byte in the last disk block; or the
> >>    filecan be rewritten in a different format.
>
> > Hi,
>
> > the program i am looking to write is similar to the one specificed by
> > you. (comparingfile). so as mentioned that comparison of files
> > considering the bytes prior to the pad would be sufficient too. Could
> > you please share a snippet as to how this is to be achieved ( i am not
> > very familiar withvmscommands ), or is there a command just to
> > compare two files upto certain bytes or something like that ?
>
> There is a DIFFERENCE utility.  I don't recall that it can be made to
> stop before End OfFile.  It should be sufficient that no difference is
> reported up to and including the last data byte in thefile.

Hi,

Is it possible to force the end-of-file marker, so that it is read
differently (using say set/file/attrib or something similar)

i tried using set file/end_of_file (which Resets the end-of-file (EOF)
mark to the highest block allocated.), but then while doing a diff i
am getting the following error

%DIFF-F-READERR, error reading BT$$_CURES:[CURES.REPT]
TEMP_COMP_TRACK_SUMIR.TXT;1
-RMS-W-RTB, 1358 byte record too large for user's buffer

Regards,
Sumir