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require 'json'
require 'socket'
require 'io/wait'
class VMCommand
attr_reader :cmd, :returncode, :stdout, :stderr
def initialize(vm, cmd, options = {})
@cmd = cmd
@returncode, @stdout, @stderr = VMCommand.execute(vm, cmd, options)
end
def VMCommand.wait_until_remote_shell_is_up(vm, timeout = 90)
try_for(timeout, :msg => "Remote shell seems to be down") do
sleep(20)
Timeout::timeout(10) do
VMCommand.execute(vm, "echo 'true'")
end
end
end
# The parameter `cmd` cannot contain newlines. Separate multiple
# commands using ";" instead.
# If `:spawn` is false the server will block until it has finished
# executing `cmd`. If it's true the server won't block, and the
# response will always be [0, "", ""] (only used as an
# ACK). execute() will always block until a response is received,
# though. Spawning is useful when starting processes in the
# background (or running scripts that does the same) like our
# onioncircuits wrapper, or any application we want to interact with.
def VMCommand.execute(vm, cmd, options = {})
options[:user] ||= "root"
options[:spawn] ||= false
type = options[:spawn] ? "spawn" : "call"
socket = TCPSocket.new("127.0.0.1", vm.get_remote_shell_port)
debug_log("#{type}ing as #{options[:user]}: #{cmd}")
begin
#socket.puts(JSON.dump([type, options[:user], cmd]))
socket.puts( "\n")
sleep(1)
socket.puts( "\003")
sleep(1)
socket.puts( cmd + "\n")
sleep(1)
while socket.ready?
s = socket.readline(sep = "\n").chomp("\n")
debug_log("#{type} read: #{s}") if not(options[:spawn])
if ('true' == s) then
break
end
end
ensure
socket.close
end
if ('true' == s)
return true
else
return VMCommand.execute(vm, cmd, options)
end
end
def success?
return @returncode == 0
end
def failure?
return not(success?)
end
def to_s
"Return status: #{@returncode}\n" +
"STDOUT:\n" +
@stdout +
"STDERR:\n" +
@stderr
end
end
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