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__pycache__	[ DIR ]	drwxr-xr-x	2026-07-12 06:55
analyze	[ DIR ]	drwxr-xr-x	2026-07-12 06:55
cmd	[ DIR ]	drwxr-xr-x	2026-07-12 06:55
config	[ DIR ]	drwxr-xr-x	2026-07-12 06:55
distros	[ DIR ]	drwxr-xr-x	2026-07-12 06:55
filters	[ DIR ]	drwxr-xr-x	2026-07-12 06:55
handlers	[ DIR ]	drwxr-xr-x	2026-07-12 06:55
mergers	[ DIR ]	drwxr-xr-x	2026-07-12 06:55
net	[ DIR ]	drwxr-xr-x	2026-07-12 06:55
reporting	[ DIR ]	drwxr-xr-x	2026-07-12 06:55
sources	[ DIR ]	drwxr-xr-x	2026-07-12 06:55
__init__.py	0 B	-rw-r--r--	2022-11-23 21:17
apport.py	5.74 KB	-rw-r--r--	2022-11-23 21:17
atomic_helper.py	1.38 KB	-rw-r--r--	2022-11-23 21:17
cloud.py	3.49 KB	-rw-r--r--	2022-11-23 21:17
dhclient_hook.py	2.49 KB	-rw-r--r--	2022-11-23 21:17
dmi.py	6 KB	-rw-r--r--	2022-11-23 21:17
event.py	2.05 KB	-rw-r--r--	2022-11-23 21:17
features.py	2.33 KB	-rw-r--r--	2022-11-23 21:17
gpg.py	4.32 KB	-rw-r--r--	2022-11-23 21:17
helpers.py	16.43 KB	-rw-r--r--	2022-11-23 21:17
importer.py	1.75 KB	-rw-r--r--	2022-11-23 21:17
log.py	4.33 KB	-rw-r--r--	2022-11-23 21:17
netinfo.py	22.57 KB	-rw-r--r--	2022-11-23 21:17
patcher.py	1.1 KB	-rw-r--r--	2022-11-23 21:17
persistence.py	2.54 KB	-rw-r--r--	2022-11-23 21:17
registry.py	1.02 KB	-rw-r--r--	2022-11-23 21:17
safeyaml.py	5.84 KB	-rw-r--r--	2022-11-23 21:17
settings.py	1.99 KB	-rw-r--r--	2022-11-23 21:17
signal_handler.py	1.78 KB	-rw-r--r--	2022-11-23 21:17
simpletable.py	1.93 KB	-rw-r--r--	2022-11-23 21:17
ssh_util.py	20.16 KB	-rw-r--r--	2022-11-23 21:17
stages.py	34.31 KB	-rw-r--r--	2022-11-23 21:17
subp.py	13.24 KB	-rw-r--r--	2022-11-23 21:17
temp_utils.py	3.19 KB	-rw-r--r--	2022-11-23 21:17
templater.py	5.83 KB	-rw-r--r--	2022-11-23 21:17
type_utils.py	726 B	-rw-r--r--	2022-11-23 21:17
url_helper.py	27.92 KB	-rw-r--r--	2022-11-23 21:17
user_data.py	14.49 KB	-rw-r--r--	2022-11-23 21:17
util.py	88.21 KB	-rw-r--r--	2022-11-23 21:17
version.py	588 B	-rw-r--r--	2022-11-23 21:17
warnings.py	3.84 KB	-rw-r--r--	2022-11-23 21:17

Rename

# This file is part of cloud-init. See LICENSE file for license information.

"""Run the dhclient hook to record network info."""

import argparse
import os

from cloudinit import atomic_helper
from cloudinit import log as logging
from cloudinit import stages

LOG = logging.getLogger(__name__)

NAME = "dhclient-hook"
UP = "up"
DOWN = "down"
EVENTS = (UP, DOWN)

def _get_hooks_dir():
    i = stages.Init()
    return os.path.join(i.paths.get_runpath(), "dhclient.hooks")

def _filter_env_vals(info):
    """Given info (os.environ), return a dictionary with
    lower case keys for each entry starting with DHCP4_ or new_."""
    new_info = {}
    for k, v in info.items():
        if k.startswith("DHCP4_") or k.startswith("new_"):
            key = (k.replace("DHCP4_", "").replace("new_", "")).lower()
            new_info[key] = v
    return new_info

def run_hook(interface, event, data_d=None, env=None):
    if event not in EVENTS:
        raise ValueError(
            "Unexpected event '%s'. Expected one of: %s" % (event, EVENTS)
        )
    if data_d is None:
        data_d = _get_hooks_dir()
    if env is None:
        env = os.environ
    hook_file = os.path.join(data_d, interface + ".json")

if event == UP:
        if not os.path.exists(data_d):
            os.makedirs(data_d)
        atomic_helper.write_json(hook_file, _filter_env_vals(env))
        LOG.debug("Wrote dhclient options in %s", hook_file)
    elif event == DOWN:
        if os.path.exists(hook_file):
            os.remove(hook_file)
            LOG.debug("Removed dhclient options file %s", hook_file)

def get_parser(parser=None):
    if parser is None:
        parser = argparse.ArgumentParser(prog=NAME, description=__doc__)
    parser.add_argument(
        "event", help="event taken on the interface", choices=EVENTS
    )
    parser.add_argument(
        "interface", help="the network interface being acted upon"
    )
    # cloud-init main uses 'action'
    parser.set_defaults(action=(NAME, handle_args))
    return parser

def handle_args(name, args, data_d=None):
    """Handle the Namespace args.
    Takes 'name' as passed by cloud-init main. not used here."""
    return run_hook(interface=args.interface, event=args.event, data_d=data_d)

if __name__ == "__main__":
    import sys

parser = get_parser()
    args = parser.parse_args(args=sys.argv[1:])
    return_value = handle_args(
        NAME, args, data_d=os.environ.get("_CI_DHCP_HOOK_DATA_D")
    )
    if return_value:
        sys.exit(return_value)

# vi: ts=4 expandtab