SUMMARY: ssh issue within script

After some messing around (trial and error really) i have got it to work.

Original problem is below but the resolution was to remove the -n from 
the ssh_opts variable and place it only on the source side of the ssh 
command.

I had tried various -t -t options as i understand this relates to pseudo 
terminals but had no joy.

The following now works :-

------
ssh_opts="-o ConnectTimeout=15 \
-o BatchMode=yes \
-o StrictHostKeyChecking=no \
-o LogLevel=quiet \
"
#-n "

-----------

ssh ${ssh_opts} -n 2>> ${err_log} user@${srv} "cat ${source_file}" | ssh ${ssh_opts} ${dest_host} "cat > ${dest_dir}/${srv}.latest.tar" 2>> ${err_log}


The -n option prevents reading from standard in and allows ssh to run in 
the background and not override the shell script process. This is why i 
assume it is required on the first ssh and needs not to be present on 
the second.

Hope this helps someone.


Original request :-
----------------------------------

Guys i'm trying to run an ssh command from within a shell script but am 
getting an error.

It works fine from the shell :-

------
ssh_opts="-o ConnectTimeout=15 \
-o BatchMode=yes \
-o StrictHostKeyChecking=no \
-o LogLevel=quiet \
-n "

-----------

ssh ${ssh_opts} 2>> ${err_log} user@${srv} "cat ${source_file}" | ssh 
${ssh_opts} "cat > ${dest_dir}/${srv}.latest.tar" 2>> ${err_log}


The error i'm getting in my error log is this :-


Pseudo-terminal will not be allocated because stdin is not a terminal.
-----------------------------


The reason i am doing this type of transfer is i need to get files from 
one machine to another using a third as a middle man without storing the 
file on the middle machine.

e.g

host B initiates an ssh to host A and cats the file through its 
connection to a third host C.

Any help appreciated

Cheers
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