Class: GuessOS::Conn

Inherits:
Object
  • Object
show all
Defined in:
lib/guess_os/conn.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(host) ⇒ Conn

Returns a new instance of Conn.



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# File 'lib/guess_os/conn.rb', line 10

def initialize(host)
  @host = host
  @last_output = ""
  @status = nil
  @ok = nil
end

Instance Attribute Details

#host ⇒ Object (readonly)

Returns the value of attribute host.



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# File 'lib/guess_os/conn.rb', line 5

def host
  @host
end

#last_output ⇒ Object (readonly)

Returns the value of attribute last_output.



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# File 'lib/guess_os/conn.rb', line 8

def last_output
  @last_output
end

#ok ⇒ Object (readonly)

Returns the value of attribute ok.



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# File 'lib/guess_os/conn.rb', line 6

def ok
  @ok
end

#status ⇒ Object (readonly)

Returns the value of attribute status.



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# File 'lib/guess_os/conn.rb', line 7

def status
  @status
end

Instance Method Details

#exec(command) ⇒ Object 



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# File 'lib/guess_os/conn.rb', line 17

def exec(command)
  @ok = :unkown
  @status = :unkown

  return local_exec(command) if host.local?
  remote_exec(command)
end

#local_exec(command) ⇒ Object 



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# File 'lib/guess_os/conn.rb', line 25

def local_exec(command)
  begin
    output = `#{command}`
  rescue
    @ok = false
    @status = "Error: Command not found!"
  end
  if $?.nil?
    @ok = false
    @status = "Error: Command not found!"
  elsif $?.exitstatus.zero?
    @ok = true
    @status = "Ok"
  else
    @ok = false
    @status = "Exit status: #{$?.exitstatus}"
  end

  @last_output = if output.nil?
    ""
  else
    output.encode(Encoding::UTF_8, invalid: :replace)
  end
end

#remote_exec(command) ⇒ Object 



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# File 'lib/guess_os/conn.rb', line 50

def remote_exec(command)
  output = "Error"
  begin
    session = Net::SSH.start(@host.ip,
      @host.username,
      port: @host.port,
      password: @host.password,
      keepalive: true,
      timeout: 30,
      non_interactive: true)
    if session.instance_of?(Net::SSH::Connection::Session)
      output = session.exec!(command)
      @status = :ok
      @ok = true
    end
  rescue Errno::EHOSTUNREACH
    @status = "[ERROR] Host #{@host.ip} unreachable!"
  rescue Net::SSH::AuthenticationFailed
    @status = "[ERROR] SSH::AuthenticationFailed!"
  rescue Net::SSH::HostKeyMismatch
    @status = "SSH::HostKeyMismatch!"
    puts("* The destination server's fingerprint is not matching " \
        "what is in your local known_hosts file.")
    puts("* Remove the existing entry in your local known_hosts file")
    puts("* Try this => ssh-keygen -f '/home/USERNAME/.ssh/known_hosts' " \
        "-R #{@host.ip}")
  rescue SocketError
    @status = "[ERROR] SocketError with IP/port [#{@host.ip}:#{@host.port}]"
  rescue Errno::ECONNREFUSED
    @status = "[ERROR] ConnRefused: SSH on [#{@host.username}@#{@host.ip}:#{@host.port}]"
  rescue => e
    @status = "[#{e.class}] SSH on <#{@host.username}@#{@host.ip}:#{@host.port}>" \
        " exec: #{command}"
  end
  @last_output = if output.nil?
    ""
  else
    output.encode(Encoding::UTF_8, invalid: :replace)
  end
end