#!/usr/bin/python2.7

# Copyright (c) 2014, 2015, Oracle and/or its affiliates. All rights reserved.
#
#    Licensed under the Apache License, Version 2.0 (the "License"); you may
#    not use this file except in compliance with the License. You may obtain
#    a copy of the License at
#
#         http://www.apache.org/licenses/LICENSE-2.0
#
#    Unless required by applicable law or agreed to in writing, software
#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
#    License for the specific language governing permissions and limitations
#    under the License.

import errno
import os
import subprocess
import sys

import smf_include


def start():
    cfgfile = "/etc/swift/rsyncd.conf"
    if not os.path.isfile(cfgfile):
        smf_include.smf_method_exit(
            smf_include.SMF_EXIT_ERR_CONFIG, "missing_config",
            "Missing configuration file")

    # This is the default delivered in /etc/swift/rsyncd.conf
    try:
        os.mkdir("/var/run/swift")
    except OSError as e:
        if e.errno != errno.EEXIST:
            raise

    cmdline = ["/usr/bin/rsync", "--daemon", "--config", cfgfile]
    try:
        proc = subprocess.Popen(cmdline)
    except OSError as err:
        print >> sys.stderr, "Error executing rsync: %s" % err
        smf_include.smf_method_exit(
            smf_include.SMF_EXIT_ERR_FATAL, "exec_error",
            "Error executing rsync: %s" % err)

    ret = proc.wait()
    if ret != 0:
        print >> sys.stderr, "rsync daemon failed to start (see message above)"
        print >> sys.stderr, "commandline:", " ".join(cmdline)
        print >> sys.stderr, "exit code:", ret
        smf_include.smf_method_exit(
            smf_include.SMF_EXIT_ERR_FATAL, "exec_fail",
            "rsync daemon failed to start (see service log)")

    return smf_include.SMF_EXIT_OK

if __name__ == "__main__":
    os.putenv("LC_ALL", "C")
    smf_include.smf_main()