[Info-vax] Potential loss of data problem in sftp client in TCP/IP Services ?

[Simon Clubley]

On 2012-03-13, VAXman-  @SendSpamHere.ORG <VAXman- at SendSpamHere.ORG> wrote:
> In article <jjn54r$vek$1 at dont-email.me>, Simon Clubley <clubley at remove_me.eisner.decus.org-Earth.UFP> writes:
>>On 2012-03-12, David Froble <davef at tsoft-inc.com> wrote:
>>>
>>> I'm still trying to understand the problem.  You indicate that you had been using V5.6 
>>> ECO5.  Are you saying the problem exists in this version?
>>>
>>
>>No, the file truncation problem does not exist in the sftp image supplied
>>with ECO5, but other different problems do exist, which is why the latest
>>Engineering images were loaded onto the system in question.
>>
>>This file truncation problem is clearly a very recent problem. I am still
>>waiting to hear back from HP, so in the meantime I am trying to find out
>>if anyone else can duplicate this using the most recent TCP/IP ECO (V5.7
>>ECO3).
>
> I just transferred my LOGIN.COM file to one of my Ubuntu laptops:
>

Thanks for doing this. Just for confirmation, was this V5.7, ECO3 ?

> $ sftp -oPort=###### vaxman at 192.168.#.###
>   
> sftp> cd Desktop
> /home/vaxman/Desktop
> sftp> put login.com
>  login.com (src): got EOF reading file (server msg: 'Encountered EOF.')
> sftp> 
>
> On the Ubuntu Laptop, 'gedit' opened the file just fine and all of its
> contents were available.  If you can give me a couple of "reproducers"
> which exhibit your issue, I'll give them a try.
>
> I've been using 'sftp' extensively to transfer files to and from my VMS
> systems to my Linux systems and I've never seen any problems exhibited.
> I'm not saying there aren't any issues, just that my files just haven't
> exhibited problems that yours have.
>

I've just created a simple file which reproduces the problem for me:

AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
BBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBB
CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC
DDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDD
EEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEE
FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF
GGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGG
HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH
IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII
JJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJ
KKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKK
LLLLLLLLLLLLLLLLLLLLLLLL
MMMMM

When transferred to a Linux sftp server, this is what is received:

AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
BBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBB
CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC
DDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDD
EEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEE
FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF
GGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGG
HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH
IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII
JJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJ
KKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKK
LLLLLLLLLLLLLLLLLL

Note the M's and the last few L's are missing.

Simon.

-- 
Simon Clubley, clubley at remove_me.eisner.decus.org-Earth.UFP
Microsoft: Bringing you 1980s technology to a 21st century world