import ConfigParser

from subprocess import CalledProcessError, Popen, PIPE, check_call

    # retrieve dataset path for suspend images

    nova_conf = "/etc/nova/nova.conf"

    if not os.path.exists(nova_conf):

        print "%s doesn't exist" % nova_conf

        return smf_include.SMF_EXIT_ERR_CONFIG

    parser = ConfigParser.ConfigParser()

    parser.read(nova_conf)

    # retrieve the suspend path or just get the default

    default_path = '/var/share/suspend'

    try:

        suspend_path = parser.get('DEFAULT', 'zones_suspend_path')

    except ConfigParser.NoOptionError:

        suspend_path = default_path

    if not os.path.exists(suspend_path):

        if suspend_path == default_path:

            # get the root pool name

            cmd = ['/usr/sbin/zfs', 'list', '-Ho', 'name', '/']

            p = Popen(cmd, stdout=PIPE, stderr=PIPE)

            output, error = p.communicate()

            if p.returncode != 0:

                print "unable to determine root pool name: %s" % (error)

                return smf_include.SMF_EXIT_ERR_CONFIG

            rpool = output.split('/')[0]

            # the default directory doesn't exist, create a new dataset for it

            suspend_ds = os.path.join(rpool, 'VARSHARE/suspend')

            try:

                check_call(['/usr/bin/pfexec', '/usr/sbin/zfs', 'create', '-p',

                            '-o', 'mountpoint=' + suspend_path, suspend_ds])

            except CalledProcessError as err:

                print "unable to create %s: %s" % (suspend_ds, err)

                return smf_include.SMF_EXIT_ERR_CONFIG

        else:

            # the user specified a path, but it doesn't exist

            print "Zones suspend path %s does not exist" % (suspend_path)

            return smf_include.SMF_EXIT_ERR_CONFIG