From: "李亚飞" <lyfi2003@...>
Date: 2010-11-27T20:49:22+09:00
Subject: Re: [垃圾邮件] Net::SSH.exec Using the "exec" method interactively

maybe you want to use exec! ?


�� Sat, 27 Nov 2010 01:17:14 +0800��Guillermo Riojas  
<guillermo.riojas@gmail.com> �:

> Hi there,
>
> Recently i started playing with the Net::SSH gem. So far, good, but i
> just came across i question i haven't been able to respond.
>
> My intention is to issue several commands using the same channel in
> order to be able to give continuity to my list of instructions, making
> it somehow "interactive". So far, after the first command is typed and
> the output returned, the rest of the instructions seem to be "not
> executed". As i am pretty new to the gem and SSH in general, i realized
> that somehow once the channel is closed the session too and of course,
> opening a new channel puts me back in the starting point.
>
> So if i would like to create folder, navigate to the folder i just
> created , do some other stuff there and then exit, wont work as i
> expect, because every command sent starts in a new session.
>
> A sample of the code here:
>
> def exec_cmd
>   cont = true
>
>   channel = @ssh.open_channel do |chn|
>     while cont
>       print "cmd> "; STDOUT.flush; str = gets.chop  #User input command
>       cont = false if str.empty?
>       channel_execute chn, str.to_s
>     end
>   end #channel open loop
>
>   channel.wait
> end
>
> def channel_execute(chn, cmd = nil)
>   return nil if cmd.nil?
>   puts "Executing Command [#{cmd}]"
>
>   chn.exec(cmd.to_s) do |ch,success|
>     raise "Could not execute command" unless success
>
>     ch.on_data do |c, data|
>       out = data.split("\n")
>       out.each do |e|
>         puts "#{e}"
>       end
>     end
>
>     ch.on_extended_data do |c, type, data|
>       out = data.split("\n")
>       out.each do |e|
>         puts "#{e}"
>       end
>     end
>
>     ch.on_close { @log.debug("exec") {"Command loop finished."} }
>
>   end #chn exec loop
>
>   chn.wait
>
> end
>
>
> Now, my first work around is sending once the list of all the commands,
> in this way "mkdir testfolder; cd testfolder; mkdir testfolder2; cd /;
> ..."
>
> However, is there any way i can keep the channel "open" in order to be
> able to send each and every command separately?
>
> Any hint is greatly appreaciated.
>
> guillermo