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Preview: udev.py Size: 1.39 KB

//lib/python3.6/site-packages/cloudinit/net/udev.py

# Copyright (C) 2015 Canonical Ltd.
#
# Author: Ryan Harper <ryan.harper@canonical.com>
#
# This file is part of cloud-init. See LICENSE file for license information.


def compose_udev_equality(key, value):
    """Return a udev comparison clause, like `ACTION=="add"`."""
    assert key == key.upper()
    return '%s=="%s"' % (key, value)


def compose_udev_attr_equality(attribute, value):
    """Return a udev attribute comparison clause, like `ATTR{type}=="1"`."""
    assert attribute == attribute.lower()
    return 'ATTR{%s}=="%s"' % (attribute, value)


def compose_udev_setting(key, value):
    """Return a udev assignment clause, like `NAME="eth0"`."""
    assert key == key.upper()
    return '%s="%s"' % (key, value)


def generate_udev_rule(interface, mac, driver=None):
    """Return a udev rule to set the name of network interface with `mac`.

    The rule ends up as a single line looking something like:

    SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*",
    ATTR{address}="ff:ee:dd:cc:bb:aa", NAME="eth0"
    """
    if not driver:
        driver = "?*"

    rule = ", ".join(
        [
            compose_udev_equality("SUBSYSTEM", "net"),
            compose_udev_equality("ACTION", "add"),
            compose_udev_equality("DRIVERS", driver),
            compose_udev_attr_equality("address", mac),
            compose_udev_setting("NAME", interface),
        ]
    )
    return "%s\n" % rule

Name	Size	Perms	Modified	Actions
netops DIR	-	drwxr-xr-x	2026-01-24 23:01:14	Edit Download recursive recursive
__pycache__ DIR	-	drwxr-xr-x	2026-01-24 23:01:14	Edit Download recursive recursive
activators.py	8.77 KB	lrw-r--r--	2026-01-23 08:56:46	Edit Download recursive recursive
bsd.py	8.43 KB	lrw-r--r--	2023-12-04 11:47:40	Edit Download recursive recursive
cmdline.py	9.04 KB	lrw-r--r--	2023-12-04 11:47:40	Edit Download recursive recursive
dhcp.py	21.06 KB	lrw-r--r--	2023-12-04 11:47:40	Edit Download recursive recursive
eni.py	21.26 KB	lrw-r--r--	2023-12-04 11:47:40	Edit Download recursive recursive
ephemeral.py	14.33 KB	lrw-r--r--	2023-12-04 11:47:40	Edit Download recursive recursive
freebsd.py	3.25 KB	lrw-r--r--	2023-12-04 11:47:40	Edit Download recursive recursive
netbsd.py	1.41 KB	lrw-r--r--	2023-12-04 11:47:40	Edit Download recursive recursive
netplan.py	18.87 KB	lrw-r--r--	2023-12-04 11:47:40	Edit Download recursive recursive
networkd.py	12.19 KB	lrw-r--r--	2023-12-04 11:47:40	Edit Download recursive recursive
network_manager.py	19.06 KB	lrw-r--r--	2026-01-23 08:56:46	Edit Download recursive recursive
network_state.py	35.77 KB	lrw-r--r--	2023-12-04 11:47:40	Edit Download recursive recursive
openbsd.py	2.47 KB	lrw-r--r--	2023-12-04 11:47:40	Edit Download recursive recursive
renderer.py	1.64 KB	lrw-r--r--	2023-12-04 11:47:40	Edit Download recursive recursive
renderers.py	1.78 KB	lrw-r--r--	2023-12-04 11:47:40	Edit Download recursive recursive
sysconfig.py	42.80 KB	lrw-r--r--	2026-01-23 08:56:46	Edit Download recursive recursive
udev.py	1.39 KB	lrw-r--r--	2023-12-04 11:47:40	Edit Download recursive recursive
__init__.py	42.24 KB	lrw-r--r--	2026-01-23 08:56:46	Edit Download recursive recursive

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