I am trying to execute cmds on a remote CPU through telnet. While some commands sent (through Ruby's stdlib for telnet) are successful, others are giving me a weird response:
*===============================================================
Welcome to Microsoft Telnet Server.
*===============================================================
C:\Documents and Settings\UserJW>ls
Desktop
Favorites
My Documents
Start Menu
Sti_Trace.log
C:\Documents and Settings\UserJW>cd\
More?
Why is telnet giving me this "More?" response, as if expecting something?
In the code, I am simply connecting to remote CPU, logging in, and sending commands:
#connection = Net::Telnet.new(...)
#connection.login( user, pwd )
#connection.cmd(...)
Any help would be appreciated.
Thanks,
J
**EDIT:
#connection = Net::Telnet.new(
"Host" => machine,
"Prompt" => /[A-Za-z]:\\.*>\z/n,
"Timeout" => 3,
"Output_log" => output )
#connection.login( user, pwd )
#connection.cmd( 'ls' )
#connection.cmd( 'ls' )
output...
C:\Documents and Settings\UserJW>
ls
Desktop
Favorites
My Documents
Start Menu
Sti_Trace.log
C:\Documents and Settings\UserJW>
ls
More?
I can't even send more than one command, apparently. Is my Prompt regex wrong? I'm trying to allow..
C:[anything...]>
I meet a same problem with you ( ruby telnet to windows 2008 ,execute command error ).I solved it. the reason is ruby net/telnet library use error newline seperator. Must be EOL(CR+LF) but CR+NULL . But I don't know who make the bug,windows or ruby? I write a monkey patch as below:
class Net::Telnet
def print(string)
string = string.gsub(/#{IAC}/no, IAC + IAC) if #options["Telnetmode"]
if #options["Binmode"]
self.write(string)
else
if #telnet_option["BINARY"] and #telnet_option["SGA"]
self.write(string.gsub(/\n/n, CR))
elsif #telnet_option["SGA"]
self.write(string.gsub(/\n/n, EOL)) ### fix here. reaplce CR+NULL bY EOL
else
self.write(string.gsub(/\n/n, EOL))
end
end
end
end
Related
My oracle db is only accessable via a jumpoff server and is load balanced. As a result I run the following background tunnel command in bash:
ssh ${jumpoffUser}#${jumpoffIp} -L1521:ont-db01-vip:1521 -L1522:ont-db02-vip:1521 -fN
Before I run my commands on the db using sqlplus like so:
sqlplus #{#sqlUsername}/#{#sqlPassword}#'#{#sqlUrl}' #scripts/populateASDB.sql
This all works fine.
Now I want to rubisize this procedure.
In looking up the documentation on ruby I could not find how to put the tunnel in the background (which would be my preference) but I found documentation on local port forwarding which I thought would emulate the above tunnel and subsequent sqlplus command.
Here is my code:
Net::SSH.start( #jumpoffIp, #jumpoffUser ) do |session|
session.forward.local( 1521, 'ont-db01-vip', 1521 )
session.forward.local( 1522, 'ont-db02-vip', 1521 )
puts "About to populateDB"
res = %x[sqlplus #{#sqlUsername}/#{#sqlPassword}#'#{#sqlUrl}' #scripts/populateASDB.sql > output.txt]
puts "populateDb output #{res}"
session.loop
end
When I run the above I get the line "About to populateDB" but it hangs on the actual running of the sqlplus command. Is there something wrong with my port forwarding code or how do I put the following:
ssh ${jumpoffUser}#${jumpoffIp} -L1521:ont-db01-vip:1521 -L1522:ont-db02-vip:1521 -fN
into ruby code?
A
Try to use this gem: https://github.com/net-ssh/net-ssh-gateway/
require 'net/ssh/gateway'
gateway = Net::SSH::Gateway.new(#jumpoffIp, #jumpoffUser)
gateway.open('ont-db01-vip', 1521, 1521)
gateway.open('ont-db02-vip', 1521, 1521)
res = %x[sqlplus #{#sqlUsername}/#{#sqlPassword}#'#{#sqlUrl}' #scripts/populateASDB.sql > output.txt]
puts "populateDb output #{res}"
gateway.shutdown!
You have two problems.
1) You need to use 'session.loop { true }' so that the session actually loops
2) You don't start looping the session until your sqlplus command is done, but the sqlplus needs the session looping (the forwarding to be up).
So I suggest creating a background thread using Thread.new and then killing the thread once sqlplus is done.
Thanks to David's answer, I came up with the following:
Net::SSH.start(ip_addr, 'user') do |session|
session.forward.local( 9090, 'localhost', 9090 )
# Need to run the event loop in the background for SSH callbacks to work
t = Thread.new {
session.loop { true }
}
commands.each do | command |
command.call(9090)
end
Thread.kill(t)
end
In my project I want to write a script to check if every device in my network is online/reachable. I have a method called pingtest and it works for now..
def pingtest(destination)
system("ping -n 2 #{destination}")
if $? == 0 #checking status of the backtick
puts "\n Ping was successful!"
else
close("Device is unreachable. Check the config.txt for the correct IPs.")
#close() is just print & exit..
end
end
Now I wanted to ping via a ssh session with an other device in my network:
#--------------------------------
require 'net/ssh'
Net::SSH.start(#ip, #user, :password => #password)
#--------------------------------
#ssh = Ssh.new(#config)
#ssh.cmd("ping -c 3 #{#IP}")
The ping works fine but how can I use my backtrack idea now to determine if it was succesful or not?
I thought about using a sftp connection..
"ping -c 3 #{#IP} => tmpfile.txt" => download => check/compare => delete
(or something like that) to check if it was correct, but im not statusfied with that. Is there a possibility to check the success status like I did before?
I also tried something like this..
result = #ssh.cmd("ping -c 3 #{#IP}")
if result.success? == 0 # and so on..
I startet learning ruby some days ago, so im a newbie looking forward for your ideas to help me with this problem.
You can use Net::SSH to run the command remotely, similarly to what you've already got there.
The result returned from running the command will be whatever is written to both stdout and stderr.
You can use the contents of that returned value to check if it was successful or not.
Net::SSH.start(#ip, #user. password: #password) do |ssh|
response = ssh.exec! "ping -c 3 #{#other_ip}"
if response.include? 'Destination Host Unreachable'
close("Host unreachable. Result was: #{result}")
else
puts "\n Ping was successful"
end
end
So I was reading the documentation for the method nlst in the NET::FTP module (ruby-1.8.6). The source code displayed is
# File net/ftp.rb, line 602
def nlst(dir = nil)
cmd = "NLST"
if dir
cmd = cmd + " " + dir
end
files = []
retrlines(cmd) do |line|
files.push(line)
end
return files
end
So the command is written literally in the string cmd, executed via retrlines and the list of files is given back right?
The thing I don't understand is that on my windows ftp server there is no such command:
230 User logged in.
Remote system type is Windows_NT.
ftp> nlst
?Invalid command
ftp>
and yet the the method returns the file list. How is it possible? The source code doesn't appear to have an abstraction of some sort on the command and also the source code of retrlines doesn't have anything special (to me).
# File lib/net/ftp.rb, line 475
def retrlines(cmd) # :yield: line
synchronize do
with_binary(false) do
conn = transfercmd(cmd)
loop do
line = conn.gets
break if line == nil
yield(line.sub(/\r?\n\z/, ""), !line.match(/\n\z/).nil?)
end
conn.close
voidresp
end
end
end
I traced back the methods called to sendcmd inside transfercmd but I have no clue really.
The question is who is telling you ?Invalid command?
In this case it's the FTP client, not the server.
The client is just a front-end for commands that it implements, converting these front-end commands into proper FTP protocol command strings for the server.
What you're looking for is the nlist (not nlst) command in your client, which will issue the NLST FTP protocol command to the server.
ftp> help nlst
?Invalid help command nlst
ftp> help nlist
nlist nlist contents of remote directory
ftp>
I am trying to implement the FTP protocol in Ruby. The problem is that when the user enters the bye command my program doesn't respond (the other commands work fine). Here is some of my code (the socket parts are omitted). Can anyone tell me what is going wrong? (I know that when bye is entered the standard windows FTP program sends "QUIT".)
user_on = true
while user_on
cmd = client.recv(2000)
# THIS IS WHERE IT FREEZES
if cmd.contains? 'QUIT'
client.puts("221 Goodbye.")
client.close
user_on = false
else
puts("500 UNRECOGNIZED COMMAND")
cmd = client.recv(2000)
end
end
I have written a ruby script which opens up dlink admin page in firefox and does a ADSL connection or disconnection.
I could run this script in the terminal without any problem. But if I put it as cron job, it doesn't fire up firefox.
This is the entry I have in crontab
# connect to dataone
55 17 * * * ruby /home/raguanu/Dropbox/nettie.rb >> /tmp/cron_test
I see the following entries in /tmp/cron_test. So it looks like the script indeed ran.
PROFILE:
i486-linux
/usr/bin/firefox -jssh
But I couldn't figure out why I didn't see firefox opening up, for this automation to work. Here is /home/raguanu/Dropbox/nettie.rb
#!/usr/bin/ruby -w
require 'rubygems'
require 'firewatir'
require 'optiflag'
module Options extend OptiFlagSet
character_flag :d do
long_form 'disconnect'
description 'Mention this flag if you want to disconnect dataone'
end
flag :l do
optional
long_form 'admin_link'
default 'http://192.168.1.1'
description 'Dlink web administration link. Defaults to http://192.168.1.1'
end
flag :u do
optional
long_form 'user'
default 'admin'
description 'Dlink administrator user name. Defaults to "admin"'
end
flag :p do
optional
long_form 'password'
default 'admin'
description 'Dlink administrator password. Defaults to "admin"'
end
flag :c do
optional
long_form 'connection_name'
default 'bsnl'
description 'Dataone connection name. Defaults to "bsnl"'
end
extended_help_flag :h do
long_form 'help'
end
and_process!
end
class DlinkAdmin
include FireWatir
def initialize(admin_link = "http://192.168.1.1", user = 'admin', pwd = 'admin')
#admin_link, #user, #pwd = admin_link, user, pwd
end
def connect( connection_name = 'bsnl' )
goto_connection_page connection_name
# disconnect prior to connection
#browser.button(:value, 'Disconnect').click
# connect
#browser.button(:value, 'Connect').click
# done!
#browser.close
end
def disconnect( connection_name = 'bsnl' )
goto_connection_page connection_name
# disconnect
#browser.button(:value, 'Disconnect').click
# done!
#browser.close
end
private
def goto_connection_page( connection_name = 'bsnl')
#browser ||= Firefox.new
#browser.goto(#admin_link)
# login
#browser.text_field(:name, 'uiViewUserName').set(#user)
#browser.text_field(:name, 'uiViewPassword').set(#pwd)
#browser.button(:value,'Log In').click
# setup > dataone
#browser.image(:alt, 'Setup').click
#browser.link(:text, connection_name).click
end
end
admin = DlinkAdmin.new(Options.flags.l, Options.flags.u, Options.flags.p)
unless Options.flags.d?
admin.connect( Options.flags.c )
else
admin.disconnect( Options.flags.c )
end
Any help is appreciated.
You need to have a DISPLAY environment pointing at a valid X-server. This could either involve setting it to the value ":0.0" (without quotes), such that it refers to your local standard DISPLAY.
There's a few things to keep in mind though:
You could run an X virtual frame buffer (xvfb), so that Firefox simply uses that as it's display. This would mean that Firefox would be able to do all its graphical operations, but that it would be independent of your standard graphical environment. You'll have to set the DISPLAY variable appropriately so that it points to the xvfb instance. For instance, if you invoke xvfb as follows:
Xvfb :1 -screen 0 1600x1200x32
Then you'll be able to use this by setting the DISPLAY variable to :1
You're starting a full-blown firefox instance to simply connect or disconnect your modem. You would most likely be able to use "curl" to send the appropriate HTTP requests to the server, such that it performs a connect or disconnect for you. One way to trivially see what you should recreate would be to install a Firefox plugin such as LiveHTTPHeaders and note down the most important HTTP requests as you perform the actions manually.
There's even a ruby binding for curl:
libcurl for Ruby. The resulting script should be much smaller than your current script.
Programs run from cron don't have your interactive environment. Therefore they don't have and DISPLAY variable, and so you can't run any X (graphical) programs, e.g. Firefox.
I would suggest doing the HTTP connections yourself, in ruby, rather than trying to automate Firefox.
the crontab entry is wrong
it is like
#min hour day month dow user command
55 17 * * * ur_user_is_missing ruby /home/raguanu/Dropbox/nettie.rb >> /tmp/cron_test