From: Cedric Foll <cedric.foll@...>
Date: 2003-03-24T20:16:53+09:00
Subject: pb with pty & expect

Hi,

i have to run a Ruby script by cron.
When the script is runned in a shell, all is ok but when the script is
runned by cron i have a strange error:


/usr/lib/ruby/1.6/expect.rb:13:in `select': Child_changed: 308 (RuntimeError)
        from /usr/lib/ruby/1.6/expect.rb:13:in `expect'
        from /usr/local/bin/get_all.rb:11:in `scp'
        from /usr/local/bin/get_all.rb:9:in `spawn'
        from /usr/local/bin/get_all.rb:9:in `scp'
        from /usr/local/bin/get_all.rb:39

I have the following code:
------------
#!/usr/bin/ruby

require 'pty'
require 'expect'

TMP_DIR = "/cache/tmp"

def scp(host, login, passwd, file)
  PTY.spawn("/usr/bin/scp #{login}@#{host}:#{file} #{TMP_DIR} 2> /cache/tmp/err 
> /cache/tmp/autre"){|rio, wio, pid|
    wio.sync = true
    rio.expect(/ password:/){
      wio.print(passwd,"\n")
    }
    begin
      rio.gets while 1
    rescue
      puts "fini"
    end
  }
end
-----------
I'm running ruby 1.6.7
[follc@slishub /cache/tmp]$ ruby -v
ruby 1.6.7 (2002-03-19) [i386-linux]


What is the problem ? (and the solution ? ;-))

Regards