[ale] ssh / sudo file transfer?

[timothy at meanor.net]

I don't know how familiar you are with Expect, but I think it's your best bet to accomplish something like this.? I've written scripts to do things like ssh to a machine as user A, sudo su to user B, then execute commands, though I've never tried to use it to transfer files.

HTH,
Tim

?

I?m trying to come up with a command line similar to the tar pipeline which copies files.?? The wrinkle is the user needs to first ssh to the box as themselves then sudo su to the user name that owns the target directory.

e.g.? Real user is ralph on server that has the real files.? This ralph also exists on the target server.?? On the target server ralph has permissions to become oracle user by using ?sudo su ? oracle? and also permission to run commands as oracle with ?sudo ?u oracle <command>?.?? 
We do not have trusts established so users must input his password when doing an ssh between the servers.?? He must also input password when executing a sudo command on the target server.?? This works fine.? 

It even works fine when I do something like:
ssh -tt ralph at remotehost "sudo -u oracle sh -c 'ls -l /oracle/prod'" 
Note there is a single quote and a double quote at end of above line.
In this command line it prompts for password for the ssh and then again for the sudo.

It also works but spits an error if I do a tar pipeline without the sudo but with the ssh:
tar c dir1 | ssh ?tt ralph at remotehost ?tar xvf ?? 
This copies dir1 and its contents from the source server across to the home of ralph on remote host.?? As noted it works but after the ssh password has been entered it displays:
tcgetattr: Invalid argument
and then does the transfer successfully.

However, when I attempt to add the ?sudo ?u? syntax to the pipeline it spits the same error as above but never really logs in.? It appears that the sudo is getting the tar information from left side of pipe and trying to use that for the sudo password.?? I?ve tried various quoting and parenthetical notation but nothing works.
I?m wondering if anyone has successful pipeline for such file transfers or some other solution that does not require me to enable ssh trusts for the user or to setup special sudo commands.?? What I?m looking for is one off transfers not something the user will be doing every day so I don?t want to have to modify sudoers or rsync authorization when they happen to need to transfer a file in a hurry.
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