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/snap/core18/2999/usr/lib/python3/dist-packages/cloudinit/

/snap/core18/2999/usr/lib/python3/dist-packages/cloudinit

Name	Size	Mode	Actions
analyze/	-	0755	rm
cmd/	-	0755	rm
config/	-	0755	rm
distros/	-	0755	rm
filters/	-	0755	rm
handlers/	-	0755	rm
mergers/	-	0755	rm
net/	-	0755	rm
reporting/	-	0755	rm
sources/	-	0755	rm
__pycache__/	-	0755	rm
apport.py	5881	0644	edit dl rm
atomic_helper.py	1417	0644	edit dl rm
cloud.py	3574	0644	edit dl rm
dhclient_hook.py	2549	0644	edit dl rm
dmi.py	6979	0644	edit dl rm
event.py	2097	0644	edit dl rm
features.py	3146	0644	edit dl rm
gpg.py	4424	0644	edit dl rm
helpers.py	16828	0644	edit dl rm
importer.py	1789	0644	edit dl rm
log.py	4432	0644	edit dl rm
netinfo.py	23115	0644	edit dl rm
patcher.py	1130	0644	edit dl rm
persistence.py	2605	0644	edit dl rm
registry.py	1045	0644	edit dl rm
safeyaml.py	7905	0644	edit dl rm
settings.py	2041	0644	edit dl rm
signal_handler.py	1826	0644	edit dl rm
simpletable.py	1976	0644	edit dl rm
ssh_util.py	21211	0644	edit dl rm
stages.py	35311	0644	edit dl rm
subp.py	13558	0644	edit dl rm
templater.py	5965	0644	edit dl rm
temp_utils.py	3268	0644	edit dl rm
type_utils.py	726	0644	edit dl rm
url_helper.py	28628	0644	edit dl rm
user_data.py	14841	0644	edit dl rm
util.py	92622	0644	edit dl rm
version.py	596	0644	edit dl rm
warnings.py	3932	0644	edit dl rm
__init__.py	0	0644	edit dl rm

Edit: /snap/core18/2999/usr/lib/python3/dist-packages/cloudinit/dmi.py (6979B)

# This file is part of cloud-init. See LICENSE file for license information.
import os
import re
from collections import namedtuple
from typing import Optional

from cloudinit import log as logging
from cloudinit import subp
from cloudinit.util import is_container, is_FreeBSD

LOG = logging.getLogger(__name__)

# Path for DMI Data
DMI_SYS_PATH = "/sys/class/dmi/id"

KernelNames = namedtuple("KernelNames", ["linux", "freebsd"])
KernelNames.__new__.__defaults__ = (None, None)

# FreeBSD's kenv(1) and Linux /sys/class/dmi/id/* both use different names from
# dmidecode. The values are the same, and ultimately what we're interested in.
# These tools offer a "cheaper" way to access those values over dmidecode.
# This is our canonical translation table. If we add more tools on other
# platforms to find dmidecode's values, their keys need to be put in here.
DMIDECODE_TO_KERNEL = {
    "baseboard-asset-tag": KernelNames("board_asset_tag", "smbios.planar.tag"),
    "baseboard-manufacturer": KernelNames(
        "board_vendor", "smbios.planar.maker"
    ),
    "baseboard-product-name": KernelNames(
        "board_name", "smbios.planar.product"
    ),
    "baseboard-serial-number": KernelNames(
        "board_serial", "smbios.planar.serial"
    ),
    "baseboard-version": KernelNames("board_version", "smbios.planar.version"),
    "bios-release-date": KernelNames("bios_date", "smbios.bios.reldate"),
    "bios-vendor": KernelNames("bios_vendor", "smbios.bios.vendor"),
    "bios-version": KernelNames("bios_version", "smbios.bios.version"),
    "chassis-asset-tag": KernelNames(
        "chassis_asset_tag", "smbios.chassis.tag"
    ),
    "chassis-manufacturer": KernelNames(
        "chassis_vendor", "smbios.chassis.maker"
    ),
    "chassis-serial-number": KernelNames(
        "chassis_serial", "smbios.chassis.serial"
    ),
    "chassis-version": KernelNames(
        "chassis_version", "smbios.chassis.version"
    ),
    "system-manufacturer": KernelNames("sys_vendor", "smbios.system.maker"),
    "system-product-name": KernelNames(
        "product_name", "smbios.system.product"
    ),
    "system-serial-number": KernelNames(
        "product_serial", "smbios.system.serial"
    ),
    "system-uuid": KernelNames("product_uuid", "smbios.system.uuid"),
    "system-version": KernelNames("product_version", "smbios.system.version"),
}

def _read_dmi_syspath(key: str) -> Optional[str]:
    """
    Reads dmi data from /sys/class/dmi/id
    """
    kmap = DMIDECODE_TO_KERNEL.get(key)
    if kmap is None or kmap.linux is None:
        return None
    dmi_key_path = "{0}/{1}".format(DMI_SYS_PATH, kmap.linux)
    LOG.debug("querying dmi data %s", dmi_key_path)
    if not os.path.exists(dmi_key_path):
        LOG.debug("did not find %s", dmi_key_path)
        return None

try:
        with open(dmi_key_path, "rb") as fp:
            key_data = fp.read()
    except PermissionError:
        LOG.debug("Could not read %s", dmi_key_path)
        return None

# uninitialized dmi values show as all \xff and /sys appends a '\n'.
    # in that event, return empty string.
    if key_data == b"\xff" * (len(key_data) - 1) + b"\n":
        key_data = b""

try:
        return key_data.decode("utf8").strip()
    except UnicodeDecodeError as e:
        LOG.error(
            "utf-8 decode of content (%s) in %s failed: %s",
            dmi_key_path,
            key_data,
            e,
        )

return None

def _read_kenv(key: str) -> Optional[str]:
    """
    Reads dmi data from FreeBSD's kenv(1)
    """
    kmap = DMIDECODE_TO_KERNEL.get(key)
    if kmap is None or kmap.freebsd is None:
        return None

LOG.debug("querying dmi data %s", kmap.freebsd)

try:
        cmd = ["kenv", "-q", kmap.freebsd]
        (result, _err) = subp.subp(cmd)
        result = result.strip()
        LOG.debug("kenv returned '%s' for '%s'", result, kmap.freebsd)
        return result
    except subp.ProcessExecutionError as e:
        LOG.debug("failed kenv cmd: %s\n%s", cmd, e)

return None

def _call_dmidecode(key: str, dmidecode_path: str) -> Optional[str]:
    """
    Calls out to dmidecode to get the data out. This is mostly for supporting
    OS's without /sys/class/dmi/id support.
    """
    try:
        cmd = [dmidecode_path, "--string", key]
        (result, _err) = subp.subp(cmd)
        result = result.strip()
        LOG.debug("dmidecode returned '%s' for '%s'", result, key)
        if result.replace(".", "") == "":
            return ""
        return result
    except subp.ProcessExecutionError as e:
        LOG.debug("failed dmidecode cmd: %s\n%s", cmd, e)
        return None

def read_dmi_data(key: str) -> Optional[str]:
    """
    Wrapper for reading DMI data.

If running in a container return None.  This is because DMI data is
    assumed to be not useful in a container as it does not represent the
    container but rather the host.

This will do the following (returning the first that produces a
    result):
        1) Use a mapping to translate `key` from dmidecode naming to
           sysfs naming and look in /sys/class/dmi/... for a value.
        2) Use `key` as a sysfs key directly and look in /sys/class/dmi/...
        3) Fall-back to passing `key` to `dmidecode --string`.

If all of the above fail to find a value, None will be returned.
    """

if is_container():
        return None

if is_FreeBSD():
        return _read_kenv(key)

syspath_value = _read_dmi_syspath(key)
    if syspath_value is not None:
        return syspath_value

def is_x86(arch):
        return arch == "x86_64" or (arch[0] == "i" and arch[2:] == "86")

# running dmidecode can be problematic on some arches (LP: #1243287)
    uname_arch = os.uname()[4]
    if not (is_x86(uname_arch) or uname_arch in ("aarch64", "amd64")):
        LOG.debug("dmidata is not supported on %s", uname_arch)
        return None

dmidecode_path = subp.which("dmidecode")
    if dmidecode_path:
        return _call_dmidecode(key, dmidecode_path)

LOG.debug("did not find either path %s or dmidecode command", DMI_SYS_PATH)
    return None

def sub_dmi_vars(src: str) -> str:
    """Replace __dmi.VARNAME__ with DMI values from either sysfs or kenv."""
    if "__" not in src:
        return src
    valid_dmi_keys = DMIDECODE_TO_KERNEL.keys()
    for match in re.findall(r"__dmi\.([^_]+)__", src):
        if match not in valid_dmi_keys:
            LOG.warning(
                "Ignoring invalid __dmi.%s__ in %s. Expected one of: %s.",
                match,
                src,
                valid_dmi_keys,
            )
            continue
        dmi_value = read_dmi_data(match)
        if not dmi_value:
            dmi_value = ""
        LOG.debug(
            "Replacing __dmi.%s__ in '%s' with '%s'.",
            match,
            src,
            dmi_value,
        )
        src = src.replace(f"__dmi.{match}__", dmi_value)
    return src

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