[rancid] rancid 2.3.6: clogin with multiple devices fails... ($autologin not defined)

Jon Peatfield J.S.Peatfield at damtp.cam.ac.uk
Thu Jul 14 00:57:21 UTC 2011

On Wed, 13 Jul 2011, Lee wrote:

>> I can see a number of possible fixes to the current clogin code but would
>> prefer an expert to take a look at it...
>  ... crickets ...
> OK, how 'bout a proposed fix?  Starting at my line 756 in clogin it's:
> set enable 0
> foreach router [lrange $argv $i end] {
>    set router [string tolower $router]
>    # attempt at platform switching.
> Fix is to move the "set enable 0" line after the "foreach router [..." line.

Which does seem to fix it, or at least hide the underlying problems...

My worry is that the code is testing $enable in the loop before it can be 
set other than to 0, so either the testing of $enable code is wrong, or it 
really is intended to be the value of $enable from the *previous* time 
round the loop, in which case the fix may break something subtle...

Then there is the use of $autoenable itself, which I assume was left when 
the variable was renamed, but it isn't obvious (to me) if that should be 
$avautoenable or $ae since I don't understand what the test is meant to be 

So we have (in the unfixed 2.3.6):

set enable 0
foreach router [lrange $argv $i end] {
     # look for noenable option in .cloginrc
     if { [find noenable $router] == "1" } {
 	set enable 0
       if { $enable && $do_enapasswd && $autoenable == 0 && [llength $pswd] < 2 } {
 	send_user -- "\nError: no enable password for $router in $password_file.\n"
<things which set enable and tests of it>

so maybe that test of $enable just needs to be moved after the places 
where enable is set...

I clearly don't understand the code.

  -- Jon

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