flexnbd-c/tests/acceptance/fakes/dest/break_after_hello.rb

#!/usr/bin/env ruby
# Open a server, accept a client, then cancel the migration by issuing
# a break command.

require 'flexnbd/fake_dest'
include FlexNBD

addr, port, src_pid, sock = *ARGV
server = FakeDest.new(addr, port)
client = server.accept

ctrl = UNIXSocket.open(sock)

Process.kill('STOP', src_pid.to_i)
ctrl.write("break\n")
ctrl.close_write
client.write_hello
Process.kill('CONT', src_pid.to_i)

raise 'Unexpected control response' unless
  ctrl.read =~ /0: mirror stopped/

client2 = nil
begin
  client2 = server.accept('Expected timeout')
  raise 'Unexpected reconnection'
rescue Timeout::Error
  # expected
end
client.close

exit(0)