Shell Programming and Scripting

Hi there,


I want to connect to a Cisco router with a KSH script via coprocess:

telnet 192.168.2.82|&
print -p “login”
print -p "password"


With telnet it works. Now I want to use SSH:

ssh -T -l login 192.168.2.82|&
print -p "password"


The router answer me I enter a bad password, "Permission denied, please try again.". I begin to find some informations about this problem, that SSH haven't got the good stdin but I did not understand.

Thanks
Sylvain

A coroutine (two-way pipe) seems to be overkill, since you are not waiting for the remote user/password prompt.
To do such a simple thing a here-document is enough:

Code:

ssh ... << EOT
password
EOT

The problem could be that you send the password too early.
If you are willing to wait for a password prompt then you need a two-way pipe and have to read -p before print -p.

Yeap,

I have think about this so I put a "sleep 5" but it change nothing.

So I try to put a read like you said but same result it still don't work:

Code:

ssh -T -l login 192.168.2.82|&
sleep 5
read  -p ""
print -p "password"

The router still say me the password is not good.

Sorry may be I haven't understand about EOT. It's just for explanation or I can resolve my problem by using this in my script?

Thanks

It's just another way to specify some text to send to the stdandard input.

It seems that ssh actively refuses any input from the standard input if not connected to an interactive terminal.

I'm afraid that perhaps the only way is to authenticate via a private key, and have a remote script start automatically on login.

Arg! I want to communicate with Cisco router, so this solution is not possible.

I will try to search a little bit more and begin to think about another solution. To resume I want to deploye configuration on Cisco router, my script look like this:

Code:

#!/bin/ksh

send_config ()
{

ssh -l login $ip >> log/lognew |&

sleep 1
print -p "command"
print -p "exit

}


for ip in `cat ip_list`;
do
    send_config &
    sleep 1
done

Have you an idea or advice me to use something...

Thanks again

After asking my question on several forum and search on Google, nothing good.

I have read something interesting about someone who want to use SSH as a coprocess and who fail with this: girtby.net - The Other Kind of Reentrant

Finally, I think it's not possible to do by this way, because of SSH. After all I have read, SSH seem to be very boring to use in a script.

Like I want to communicate with network equipment like Cisco router, it's not possible tu use the system of public/private key so not possible to avoid the password prompt when I open the SSH sesssion.(Something is possible with expect but if I can not use this it's better)

I want to do massive deploy of configuration on network equipment, about hundred, with Telnet it's ok but with SSH I don't know how I will do?

Idea? :)