[rancid] Re: Using Rancid to pus DST changes

[Robin Mordasiewicz]

On Wed, 7 Mar 2007, Todd Heide wrote:

> How can I use (if I can) rancid to push a configuration change for the DST to all the routers? Basically it is one line,
> clock summer-time CST recurring 2 Sun Mar 2:00 1 Sun Nov 2:00

One thing you can use is expect. Here is a simple example expect script 
which you can run on each router which looping through your router.db file

[ myusername at localhost ]$ expect -f summertime_DST.exp myrouter.mydomain.com

< summertime_DST.exp >
#!/usr/bin/expect -f
#
set force_conservative 0  ;# set to 1 to force conservative mode even if
                           ;# script wasn't run conservatively originally
if {$force_conservative} {
         set send_slow {1 .1}
         proc send {ignore arg} {
                 sleep .1
                 exp_send -s -- $arg
         }
}

set timeout -1
set userid "myusername"
set vtypasswd "mypassword"
set rtr [lindex $argv 0]

spawn telnet $rtr
match_max 100000

expect {
          {Username}   { send "$userid\r"
                         expect {
                                   {*Password*} { send "$vtypasswd\r" }
                                }
                       }
          {telnet>}    { send_user "$rtr - telnet failed\n"
                        exit
                       }
          {Password}   { send "$vtypasswd\r" }
        }



send -- "conf t\r"
send -- "clock summer-time $DST_timezone recurring 2 Sun Mar 2:00 1 Sun Nov 2:00\r"
send -- "wr mem\r"
send -- "end\r"
send -- "exit\r"

expect eof

< /summertime_DST.exp >