Re: [Expectperl-discuss] Tab translation difference between AIX and Linux

[Austin S. <te...@of...>]

On Thu, Apr 13, 2006 at 04:59:38PM +0200, Christoph Schwaiger wrote:
> Hello,
> 
> after looking some time into documentation about terminals and ttys, I'm 
> still not any further. I guess I need help.
> 
> In my setup I use expect to spawn shells (rsh to AIX), (ssh to Linux), to 
> a lot of remote shells in parallel. So far so good, there is no problem 
> with that. Only, when talking to something like 30 boxes, the connection 
> closure takes a while, but OK, that's all.
> 

	You could use scp/rcp to copy the files, then diff them. If you have
a bastion you can do ssh hostone 'scp hosttwo file .'; scp 'hostone file .',
or something of that nature. ssh/rsh/scp/rcp can be setup to allow automatic
login.


> The thingy described before (called shiva) is called by another one called 
> (egalite) to retrieve output from many hosts and compare the gathered 
> files. My problem is when comparing files coming from AIX (5.2) boxes to 
> files coming from Linux (suse 9.? on Itanium), that the diff doesn't match 
> because TAB (x09) is translated on AIX boxes, but not on Linux. A hack 
> would be to give diff the option to ignore whitespaces, but this will 
> cause problems on another side, hence don't like it really.

	There is probably a setting to tell the aix tty not to do that.
`man stty` on the aix host.
	alternatively you could translate the file using something like
uuencode, then decode on the local box and feed to diff.

> As I assume to talk to remote boxes of different types has probably done 
> by somebody... (but if somebody has compared the output already?)... I 
> hope that somebody has found a solution to this one already. That would be 
> great! 
> 
> Otherwise, I guess a cat need to postprocess the output rather. That will 
> do the trick too..
> 
> Thanks in advance.
> 
> Christoph Schwaiger.
> 
> PS: If somebody knows a good documentation covering the whole data path 
> from the perl expect through the pseudo tty, to the process, to the 
> remshell and so on...feel free to make me aware of it! 

	Unix ptys are fairly widely documented, but I'm sure we could do
with a summary in the docs.

	Austin