08-04-2008
how do I handle ssh response with expect
I am trying to write an expect script that trys to telnet, if telnet fails, trys to ssh to a remote network devices.
The script works fine until the following is received :
spawn telnet 10.3.2.24
Trying 10.3.2.24...
telnet: connect to address 10.3.2.24: Connection refused
10.3.2.24 is not reachable!!
spawn ssh -l myname 10.3.2.24
The authenticity of host '10.3.2.24 (10.3.2.24)' can't be established.
RSA key fingerprint is b1:z6:22:85:3a:a6:z0:ae:6d:b3:9d:f6:77:85:01:aa.
Are you sure you want to continue connecting (yes/no)?
Ive added
expect {continue connecting*} {send "yes\r"}
at different places within the telnet host not reachable section, but cant
get expect to respond.
Ive added the entire script below for those who may want to look at it.
#! /usr/local/bin/expect --
#
# Setup Log file that will contain all steps of the process.
#============================================================
puts "[exec clear]"
set nam "[ clock format [ clock seconds ] -format "%m%d%H%M" ].log"
log_file -a $nam
#
# Open Seedfile and setup log containing failed connections.
#=============================================================
set ifil [open "seedfileofips" r]
set ofil [open "[ clock format [ clock seconds ] -format "%m%d%H%M" ].err" w]
###
# Main Body. While reading the seedfile, telnet to site
# or ssh to site
#=============================================================
while { [gets $ifil host] >=0 } {
send_user "Standby ... Validating ... $host \n"
puts "[exec clear]"
set taclnam "myname"
set tacpswd "mypassword"
set timeout 30
spawn telnet $host
expect {
{telnet:*} {
puts "$host is not reachable!!"
spawn ssh -l myname $host
expect {password:*} {
send "mypassword\n"
expect ">"
send "en\n"
expect "word:*"
send "mypassword\n"
expect "#"
interact
continue
}
}
{timeout} {
puts ""
puts "$host timed out...Router is probably down!!"
expect eof
wait
return
}
{Unknown*} {
expect eof
wait
return
}
{sername:*} {
send "mypassword\n"
expect "ord:"
send "$mypassword\n"
expect ">"
send "en\n"
expect "assword:"
send "$mypassword\n"
expect "#"
interact
continue
}
}
}
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LEARN ABOUT HPUX
ssh-argv0
SSH-ARGV0(1) BSD General Commands Manual SSH-ARGV0(1)
NAME
ssh-argv0 -- replaces the old ssh command-name as hostname handling
SYNOPSIS
hostname | user@hostname [-l login_name] [command]
hostname | user@hostname [-afgknqstvxACNTX1246] [-b bind_address] [-c cipher_spec] [-e escape_char] [-i identity_file] [-l login_name]
[-m mac_spec] [-o option] [-p port] [-F configfile] [-L port:host:hostport] [-R port:host:hostport] [-D port] [command]
DESCRIPTION
ssh-argv0 replaces the old ssh command-name as hostname handling. If you link to this script with a hostname then executing the link is
equivalent to having executed ssh with that hostname as an argument. All other arguments are passed to ssh and will be processed normally.
OPTIONS
See ssh(1).
FILES
See ssh(1).
AUTHORS
OpenSSH is a derivative of the original and free ssh 1.2.12 release by Tatu Ylonen. Aaron Campbell, Bob Beck, Markus Friedl, Niels Provos,
Theo de Raadt and Dug Song removed many bugs, re-added newer features and created OpenSSH. Markus Friedl contributed the support for SSH
protocol versions 1.5 and 2.0. Jonathan Amery wrote this ssh-argv0 script and the associated documentation.
SEE ALSO
ssh(1)
Debian Project September 7, 2001 Debian Project