import subprocess
import pty
import os, sys, time

master, slave = pty.openpty()

p = subprocess.Popen(["setsid", "--ctty", "sleep", "10000"],
			stdin = slave, stdout = slave, stderr = slave, close_fds = True)
st = os.stat("/proc/self/fd/%d" % slave)
ttyid = "tty[%x:%x]" % (st.st_rdev, st.st_dev)
os.close(slave)
time.sleep(1)

ret = subprocess.Popen(["../../criu", "dump", "-t", str(p.pid), "-v4", "--external", ttyid]).wait()
if ret:
	sys.exit(ret)
p.wait()

new_master, slave = pty.openpty() # get another pty pair
os.close(master)

ttyid = "fd[%d]:tty[%x:%x]" % (slave, st.st_rdev, st.st_dev)

ret = subprocess.Popen(["../../criu", "restore", "-v4", "--inherit-fd", ttyid, "--restore-sibling", "--restore-detach"]).wait()
if ret:
	sys.exit(ret)
os.close(slave)
os.waitpid(-1, os.WNOHANG) # is the process alive

os.close(new_master)
_, status = os.wait()
if not os.WIFSIGNALED(status) or not os.WTERMSIG(status):
	print status
	sys.exit(1)

print "PASS"

add a new test to check external terminals