Hi, I'm trying to run a bash script in openwrt but I have a problem executing the xterm command, because it can't be found. So, there is an alternative or a way to install xterm in openwrt?

Thanks in advance.

I guess you're confusing something...

xterm is a program that shows a terminal on a GUI desktop in a window. It is by no means required to run a bash script.
Since OpenWRT (in almost all cases) has no gui, there's no need for a xterm program. You just ssh into the box and there
you've got your console session.

The matter is this:

I have the main script which calls the second script with the following command:

for ROUTER in {1..10}
do
xterm -iconic -e $path/runscript $ROUTER &
done

and the runscript code is:

#!/bin/bash
#!/usr/bin/expect -f

set arg1 [lindex $argv 0]
spawn ssh root@192.168.$arg1.1 ; 
expect password ; 
send "12345\n" ; 
expect '~#' ; 
send "./script3.sh\n" ; 
interact

And the result is always:

- bash: xterm: command not found
- bash: spaw: command not found
- bash: expect: command not found
- bash: send: command not found
- bash: interact: command not found

Do you have any clue?

Thanks

ok, the first code pice would work this way:

for ROUTER in 1 2 3 4 5 6 7 8 9 10 ; do
  $path/runscript $ROUTER &
done

But the latter one is more tricky because you're using the 'expect' program there to enter the password on each host but there is no 'expect' package for OpenWRT.

I would suggest you to use a different (and more secure) approach which would avoid having to set the same root password on each host and storing that in plaintext on your router:
Use authentication by public/private key.

First you need to create a pulic+private key pair on your OpenWRT box:

root@openwrt:~# dropbearkey -t rsa -f master.key | grep "^ssh-rsa" >master.key.pub

then you copy the public key (master.key.pub) to each of your hosts that you want to ssh into and append the content of the file to the 'authorized_keys' file of root (or any other user you want to login as):

root@slavemachine:~$ cat master.key.pub >>/root/.ssh/authorized_keys

Now you should be able to ssh into your slave machines by using the private key file from the OpenWRT box, test it:

root@openwrt:~# ssh -y -i master.key root@192.168.xx.xx

And if that worked, you can use the technique in your script from above:

for ROUTER in 1 2 3 4 5 6 7 8 9 10 ; do
  ssh -y -i /root/master.key root@192.168.$ROUTER.1 /root/script3.sh
done

That should work. Guarantee is not included ;-)

Hi and thanks for this info, it was really helpful!

The problem is I don't have only 1 Master and 9 slaves, I want each router to execute the scripts and interact to each other so that means that I would need one master key for each router and put it into every router I would connect to?

And another offtopic question would be if there is any way to know when the router is transmitting or receiving so I can make a condition like:

if (routertx==1){
...}

I have done a lot of research but the only thing I've found it's related to the LEDs and triggers (http://wiki.openwrt.org/doc/uci/system in wify activity: phy0tx - flashes on transmission.) But I don't know if it's a variable neither if I can read from it how to do it.

Thanks in advance.

(Last edited by humid on 18 Sep 2012, 09:01)