RE: [Expectperl-discuss] Beginner Questions: Reference & How to H andle Large Output

[Blackstone, J. D. <jda...@ci...>]

> -----Original Message-----
> From: RGi...@a1... [mailto:RGi...@a1...]
> Sent: Thursday, January 10, 2002 10:30 AM
> To: Rick_Jasper/Delphion%DEL...@de...
> Cc: exp...@li...
> Subject: Re: [Expectperl-discuss] Beginner Questions: 
> Reference & How to
> Handle Large Output
> 
> 
> > I've got Expect 1.12 on an AIX 4.3.3 system, trying to figure out 
> > how best
> > to use it to ssh to some other system overseas, run a 
> command on that
> > oversea system that produces a lot of output (1.5 million lines, 
> > 136 MB
> > total), collect and process that output on my system.
> 
> Ugh, and there is no other way to do that?  Is it really an 
> interactive 
> application?  How about just doing a ssh command and capture the 
> output?  Or having the remote system dump that data to a disk 
> and then 
> transfer that with scp?

  To be specific, Rick, you should be able to:

$ ssh remote-host remote-command args > localfile

  You might look into ssh key generation to eliminate the need for a
password.  I recommend the O'Reilly snail book, as well as some articles by
the creator of Gentoo Linux on IBM developer works (you'll want to do a
google search; it always takes me forever to find those articles when I need
them).

  You can system() from Perl to call the ssh if you need this to be part of
a larger program.  There's also a Net::SSH::Perl module that can do the ssh
protocol itself, without the overhead of calling a separate command.  (I
think.)  You could even
open $fh, "ssh remote-host remote-command args |" || die...

  Of course, if this is a screen-oriented (curses?) interface you're using
on the remote system, you might not be able to do any of this.  That's my
plight.

jdb