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Current File : //lib/python2.7/site-packages/cloudinit/distros/gentoo.py
# Copyright (C) 2014 Rackspace, US Inc.
# Copyright (C) 2016 Matthew Thode.
#
# Author: Nate House <nathan.house@rackspace.com>
# Author: Matthew Thode <prometheanfire@gentoo.org>
#
# This file is part of cloud-init. See LICENSE file for license information.

from cloudinit import distros
from cloudinit import helpers
from cloudinit import log as logging
from cloudinit import util

from cloudinit.distros import net_util
from cloudinit.distros.parsers.hostname import HostnameConf

from cloudinit.settings import PER_INSTANCE

LOG = logging.getLogger(__name__)


class Distro(distros.Distro):
    locale_conf_fn = '/etc/locale.gen'
    network_conf_fn = '/etc/conf.d/net'
    resolve_conf_fn = '/etc/resolv.conf'
    hostname_conf_fn = '/etc/conf.d/hostname'
    init_cmd = ['rc-service']  # init scripts

    def __init__(self, name, cfg, paths):
        distros.Distro.__init__(self, name, cfg, paths)
        # This will be used to restrict certain
        # calls from repeatly happening (when they
        # should only happen say once per instance...)
        self._runner = helpers.Runners(paths)
        self.osfamily = 'gentoo'
        # Fix sshd restarts
        cfg['ssh_svcname'] = '/etc/init.d/sshd'

    def apply_locale(self, locale, out_fn=None):
        if not out_fn:
            out_fn = self.locale_conf_fn
        util.subp(['locale-gen', '-G', locale], capture=False)
        # "" provides trailing newline during join
        lines = [
            util.make_header(),
            'LANG="%s"' % locale,
            "",
        ]
        util.write_file(out_fn, "\n".join(lines))

    def install_packages(self, pkglist):
        self.update_package_sources()
        self.package_command('', pkgs=pkglist)

    def _write_network(self, settings):
        entries = net_util.translate_network(settings)
        LOG.debug("Translated ubuntu style network settings %s into %s",
                  settings, entries)
        dev_names = entries.keys()
        nameservers = []

        for (dev, info) in entries.items():
            if 'dns-nameservers' in info:
                nameservers.extend(info['dns-nameservers'])
            if dev == 'lo':
                continue
            net_fn = self.network_conf_fn + '.' + dev
            dns_nameservers = info.get('dns-nameservers')
            if isinstance(dns_nameservers, (list, tuple)):
                dns_nameservers = str(tuple(dns_nameservers)).replace(',', '')
            # eth0, {'auto': True, 'ipv6': {}, 'bootproto': 'dhcp'}
            # lo, {'dns-nameservers': ['10.0.1.3'], 'ipv6': {}, 'auto': True}
            results = ''
            if info.get('bootproto') == 'dhcp':
                results += 'config_{name}="dhcp"'.format(name=dev)
            else:
                results += (
                    'config_{name}="{ip_address} netmask {netmask}"\n'
                    'mac_{name}="{hwaddr}"\n'
                ).format(name=dev, ip_address=info.get('address'),
                         netmask=info.get('netmask'),
                         hwaddr=info.get('hwaddress'))
                results += 'routes_{name}="default via {gateway}"\n'.format(
                    name=dev,
                    gateway=info.get('gateway')
                )
            if info.get('dns-nameservers'):
                results += 'dns_servers_{name}="{dnsservers}"\n'.format(
                    name=dev,
                    dnsservers=dns_nameservers)
            util.write_file(net_fn, results)
            self._create_network_symlink(dev)
            if info.get('auto'):
                cmd = ['rc-update', 'add', 'net.{name}'.format(name=dev),
                       'default']
                try:
                    (_out, err) = util.subp(cmd)
                    if len(err):
                        LOG.warning("Running %s resulted in stderr output: %s",
                                    cmd, err)
                except util.ProcessExecutionError:
                    util.logexc(LOG, "Running interface command %s failed",
                                cmd)

        if nameservers:
            util.write_file(self.resolve_conf_fn,
                            convert_resolv_conf(nameservers))

        return dev_names

    @staticmethod
    def _create_network_symlink(interface_name):
        file_path = '/etc/init.d/net.{name}'.format(name=interface_name)
        if not util.is_link(file_path):
            util.sym_link('/etc/init.d/net.lo', file_path)

    def _bring_up_interface(self, device_name):
        cmd = ['/etc/init.d/net.%s' % device_name, 'restart']
        LOG.debug("Attempting to run bring up interface %s using command %s",
                  device_name, cmd)
        try:
            (_out, err) = util.subp(cmd)
            if len(err):
                LOG.warning("Running %s resulted in stderr output: %s",
                            cmd, err)
            return True
        except util.ProcessExecutionError:
            util.logexc(LOG, "Running interface command %s failed", cmd)
            return False

    def _bring_up_interfaces(self, device_names):
        use_all = False
        for d in device_names:
            if d == 'all':
                use_all = True
        if use_all:
            # Grab device names from init scripts
            cmd = ['ls', '/etc/init.d/net.*']
            try:
                (_out, err) = util.subp(cmd)
                if len(err):
                    LOG.warning("Running %s resulted in stderr output: %s",
                                cmd, err)
            except util.ProcessExecutionError:
                util.logexc(LOG, "Running interface command %s failed", cmd)
                return False
            devices = [x.split('.')[2] for x in _out.split('  ')]
            return distros.Distro._bring_up_interfaces(self, devices)
        else:
            return distros.Distro._bring_up_interfaces(self, device_names)

    def _write_hostname(self, your_hostname, out_fn):
        conf = None
        try:
            # Try to update the previous one
            # so lets see if we can read it first.
            conf = self._read_hostname_conf(out_fn)
        except IOError:
            pass
        if not conf:
            conf = HostnameConf('')
        conf.set_hostname(your_hostname)
        gentoo_hostname_config = 'hostname="%s"' % conf
        gentoo_hostname_config = gentoo_hostname_config.replace('\n', '')
        util.write_file(out_fn, gentoo_hostname_config, 0o644)

    def _read_system_hostname(self):
        sys_hostname = self._read_hostname(self.hostname_conf_fn)
        return self.hostname_conf_fn, sys_hostname

    @staticmethod
    def _read_hostname_conf(filename):
        conf = HostnameConf(util.load_file(filename))
        conf.parse()
        return conf

    def _read_hostname(self, filename, default=None):
        hostname = None
        try:
            conf = self._read_hostname_conf(filename)
            hostname = conf.hostname
        except IOError:
            pass
        if not hostname:
            return default
        return hostname

    def set_timezone(self, tz):
        distros.set_etc_timezone(tz=tz, tz_file=self._find_tz_file(tz))

    def package_command(self, command, args=None, pkgs=None):
        if pkgs is None:
            pkgs = []

        cmd = list('emerge')
        # Redirect output
        cmd.append("--quiet")

        if args and isinstance(args, str):
            cmd.append(args)
        elif args and isinstance(args, list):
            cmd.extend(args)

        if command:
            cmd.append(command)

        pkglist = util.expand_package_list('%s-%s', pkgs)
        cmd.extend(pkglist)

        # Allow the output of this to flow outwards (ie not be captured)
        util.subp(cmd, capture=False)

    def update_package_sources(self):
        self._runner.run("update-sources", self.package_command,
                         ["-u", "world"], freq=PER_INSTANCE)


def convert_resolv_conf(settings):
    """Returns a settings string formatted for resolv.conf."""
    result = ''
    if isinstance(settings, list):
        for ns in settings:
            result += 'nameserver %s\n' % ns
    return result

# vi: ts=4 expandtab
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