[rancid] Re: Netscreen: nlogin file 'set console page 0'

[Skinner, Michael]

It is possible for rancid to deal with the pager on netscreens.  In my
infrastructure rancid has read only accounts on devices, so has no
ability to edit the console page, it gets on fine... admittedly I had to
hack the code a bit, as the build in read-only support was broken.

Problem and fix when originally discovered:
http://www.shrubbery.net/pipermail/rancid-discuss/2007-May/002224.html

Paul Zimmerman took the trouble to tidy this up further, details at
bottom of email

There is no reason this method couldn't be used for read/write accounts.

Mike


[rancid at caillez ~/local/libexec/rancid]$ sccs diffs -C8 -r1.2 nrancid

------- nrancid -------
*** -   Mon Jul 23 09:20:57 2007
--- nrancid     Mon Jul 23 09:17:18 2007
***************
*** 141,160 ****
   }

   # This routine parses "get system"
   sub GetSystem {
       print STDERR "    In GetSystem: $_" if ($debug);

       while (<INPUT>) {
         tr/\015//d;
         next if /^\s*$/;
         last if(/$prompt/);
-       # throw away the pager lines
-       next if /^--- more ---/;

         /^Serial Number: (\d+), Control Number: \d+$/ &&
                 ProcessHistory("SYSTEM","","", "!SN: $1\n") && next;
         /^Product Name: (\S+)$/ &&
                 ProcessHistory("SYSTEM","","", "!Product: $1\n") &&
next;
         /^Hardware Version: (\S+), / &&
                 ProcessHistory("SYSTEM","","", "!HW: $1\n") && next;
         /^Software Version: (\S+), Type: (\S+)$/ &&
--- 141,160 ----
   }

   # This routine parses "get system"
   sub GetSystem {
       print STDERR "    In GetSystem: $_" if ($debug);

       while (<INPUT>) {
         tr/\015//d;
+       # throw away the pager text
+       s/^--- more ---( \x08|\x08)*//;
         next if /^\s*$/;
         last if(/$prompt/);

         /^Serial Number: (\d+), Control Number: \d+$/ &&
                 ProcessHistory("SYSTEM","","", "!SN: $1\n") && next;
         /^Product Name: (\S+)$/ &&
                 ProcessHistory("SYSTEM","","", "!Product: $1\n") &&
next;
         /^Hardware Version: (\S+), / &&
                 ProcessHistory("SYSTEM","","", "!HW: $1\n") && next;
         /^Software Version: (\S+), Type: (\S+)$/ &&
***************
*** 179,199 ****
       ProcessHistory("FILE","","","!\n");
       return(0);
   }

   sub GetConf {
       print STDERR "    In GetConf: $_" if ($debug);
       while (<INPUT>) {
         tr/\015//d;
         next if /^\s*$/;
         next if /^Total Config.+$/i;
         last if(/$prompt/);
-       # throw away the pager lines
-       next if /^--- more ---/;

         if (/^set admin name "(\S+)"$/ && $filter_pwds >= 1) {
             ProcessHistory("ADMIN","","","!set admin name <removed>
\n");
             next;
         }
         if (/^set admin password (\S+)$/ && $filter_pwds >= 1) {
             ProcessHistory("ADMIN","","","!set admin password
<removed>\n");
             next;
--- 179,199 ----
       ProcessHistory("FILE","","","!\n");
       return(0);
   }

   sub GetConf {
       print STDERR "    In GetConf: $_" if ($debug);
       while (<INPUT>) {
         tr/\015//d;
+       # throw away the pager text
+       s/^--- more ---( \x08|\x08)*//;
         next if /^\s*$/;
         next if /^Total Config.+$/i;
         last if(/$prompt/);

         if (/^set admin name "(\S+)"$/ && $filter_pwds >= 1) {
             ProcessHistory("ADMIN","","","!set admin name <removed>
\n");
             next;
         }
         if (/^set admin password (\S+)$/ && $filter_pwds >= 1) {
             ProcessHistory("ADMIN","","","!set admin password
<removed>\n");
             next;



-----Original Message-----
From: rancid-discuss-bounces at shrubbery.net
[mailto:rancid-discuss-bounces at shrubbery.net] On Behalf Of john heasley
Sent: 12 November 2008 02:01
To: Atif.SIDDIQUI at HydroOne.com
Cc: rancid-discuss at shrubbery.net
Subject: [rancid] Re: Netscreen: nlogin file 'set console page 0'

Tue, Nov 11, 2008 at 05:57:41PM -0500, Atif.SIDDIQUI at HydroOne.com:
> I found this patch: config change;
> 
>  
> 
>  but we should be able to put in the page only for that vty sessionnot

> affecting all the users and config;
> 
> As RANCID does not save the config after doing the following steps; 
> other users always get a message to save the config or not; even 
> though they have not change anything; it was because RANCID added "set

> console 0" then unset it cause the config changes. Can we have a
workaround.

That does not seem to be a very good fix.  If another user happens to be
logged-in when rancid runs, the pager will be disabled AND if another
user re-enables the pager it will confuse nlogin, possibly causing it to
hang (thus more emails about problems collecting...).

A better fix, assuming this is still a global knob, is to deal with the
pager, if possible.
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