[rancid] Re: Netscreen/OpenSSH interaction problem

[john heasley]

Wed, May 20, 2009 at 02:23:40PM -0400, Michael W. Lucas:
> On Tue, May 19, 2009 at 02:24:00PM -0700, john heasley wrote:
> > Tue, May 19, 2009 at 02:23:07PM -0700, john heasley:
> > > Tue, May 19, 2009 at 05:12:11PM -0400, Michael W. Lucas:
> > > > On Tue, May 19, 2009 at 01:01:49PM -0700, john heasley wrote:
> > > > > Tue, May 19, 2009 at 03:16:30PM -0400, Michael W. Lucas:
> > > > > > Hi,
> > > > > > 
> > > > > > I've found myself inheriting responsibility for a stack of Netscreen
> > > > > > boxes, and of course I want their configurations backed up.
> > > > > > 
> > > > > > There's a problem with interactions between newer versions of OpenSSH
> > > > > > and Netscreens, however.  To SSH into a Netscreen with newer OpenSSH,
> > > > > > you must add the option "-o ControlMaster=auto" to the SSH command
> > > > > > line.
> > > > > > 
> > > > > > Is there any way to pass this option to the Rancid SSH command for my
> > > > > > Netscreen hosts?
> > > > > 
> > > > > see sshcmd in cloginrc(5).  If I failed to disseminate that change to
> > > > > all of the login scripts, we can fix that.
> > > > 
> > > > That was exactly it, thanks!
> > > > 
> > > > For anyone following along in the archives: you'll want to use a
> > > > wrapper script much like the following.  Trying to escape spaces with
> > > > backslashes, quote marks, etc., doesn't appear to work.
> > > > 
> > > > --
> > > > #!/bin/sh
> > > > 
> > > > exec ssh -oControlMaster=auto $@
> > > > --
> > > 
> > > i'd have expected
> > > add sshcmd *	{ssh -o...}
> > > 
> > > would have done it
> > 
> > Sorry for the extra mail, I should have written:
> > 
> > add sshcmd *	{ssh\ -o...}
> 
> Thanks for the help, your way certainly would be nicer.
> 
> I added this to my clogin:
> 
> add sshcmd aubvp003 {ssh\ -oControlMaster\=auto}
> 
> # clogin aubvp003
> aubvp003
> spawn {ssh\ -oControlMaster\=auto} -c 3des -x -l netscreen aubvp003
> 
> Error: {ssh\ -oControlMaster\=auto} failed: couldn't execute "": no such file or directoryerror setting blocking mode: resource temporarily unavailable
> #
> 
> Any thoughts?  (Not recalling if = needs an escape, I tried both with
> and without.)

try this patch

Index: nlogin.in
===================================================================
RCS file: /home/rancid/.CVS/rancid/bin/nlogin.in,v
retrieving revision 1.51
diff -d -u -d -u -r1.51 nlogin.in
--- nlogin.in	16 Apr 2009 21:22:58 -0000	1.51
+++ nlogin.in	20 May 2009 19:19:05 -0000
@@ -531,7 +531,7 @@
     if { "$cmethod" == "" } { set cmethod {{telnet} {ssh}} }
 
     # Figure out the SSH executable name
-    set sshcmd [find sshcmd $router]
+    set sshcmd [join [find sshcmd $router] ""]
     if { "$sshcmd" == "" } { set sshcmd {ssh} }
 
     # Login to the router