zfs send/recv invalid data

Larry Rosenman ler at lerctr.org
Wed Mar 6 19:15:11 UTC 2013


On 2013-03-06 12:59, Larry Rosenman wrote:
> On 2013-03-06 12:57, Martin Simmons wrote:
>>>>>>> On Wed, 06 Mar 2013 05:07:28 -0600, Larry Rosenman said:
>>> On 2013-03-06 04:56, Larry Rosenman wrote:
>>>> On 2013-03-06 04:51, Tom Evans wrote:
>>>>> On Wed, Mar 6, 2013 at 10:46 AM, Larry Rosenman <ler at lerctr.org>
>>>>> wrote:
>>>>>> So, you are correct that something(tm) is unclean about the ssh
>>>>>> path.
>>>>>> 
>>>>> And what is it that is added? Surely that is trivial to determine?
>>>>> echo hello > foo
>>>>> cat foo | ssh host cat
>>>>> Cheers
>>>>> Tom
>>>> it seems to be bytestream dependent, as this simple case works, and
>>>> the vast majority of the sends work, but the particular
>>>> case in the thread does NOT.
>>>> # echo hello >foo
>>>> # cat foo | ssh home cat
>>>> hello
>>>> #
>>> stranger:
>>> $ cd /tmp
>>> $ cat send.stream | ssh home openssl md5
>>> (stdin)= 9cd1d73ea8411f1c222bc90e7bea3d33
>>> $ openssl md5 send.stream
>>> MD5(send.stream)= 9cd1d73ea8411f1c222bc90e7bea3d33
>>> $
>>> so I'm not sure what is tripping it in the stream to a pipe case.
>> Is that running under the same uid?  The script you posted earlier 
>> runs the
>> pipe under ssh root at tbh.lerctr.org.
>> __Martin
> Ooo, good point.  Would csh vs. sh make a difference?
Doesn't seem to make a difference....

# cat send.stream | ssh root at home openssl md5
(stdin)= 9cd1d73ea8411f1c222bc90e7bea3d33
# uname -a
FreeBSD thebighonker.lerctr.org 8.3-STABLE FreeBSD 8.3-STABLE #54 
r247820: Mon Mar  4 18:08:11 CST 2013     
root at thebighonker.lerctr.org:/usr/obj/usr/src/sys/THEBIGHONKER  amd64
#
# exec csh
root at borg:/home/ler # pwd
/home/ler
root at borg:/home/ler # ssh tbh "cat 
/home/ler/public_html/ZFS_RECV/send.stream | ssh root at home.lerctr.org 
openssl md5"
(stdin)= 9cd1d73ea8411f1c222bc90e7bea3d33
root at borg:/home/ler # uname -a
FreeBSD borg.lerctr.org 10.0-CURRENT FreeBSD 10.0-CURRENT #124 r247826: 
Mon Mar  4 19:59:08 CST 2013     
root at borg.lerctr.org:/usr/obj/usr/src/sys/BORG-DTRACE  amd64
root at borg:/home/ler #

-- 
Larry Rosenman                     http://www.lerctr.org/~ler
Phone: +1 214-642-9640 (c)     E-Mail: ler at lerctr.org
US Mail: 430 Valona Loop, Round Rock, TX 78681-3893


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