OS : Linux
PHP Version : 7.4.33
Software : Apache/2.4.6 (CentOS) PHP/7.4.33
Information System : Linux apprendre2 3.10.0-1160.119.1.el7.x86_64 #1 SMP Tue Jun 4 14:43:51 UTC 2024 x86_64
Disable Function : # Copyright (C) 2015 Canonical Ltd.
#
# Author: Ryan Harper
#
# 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
# vi: ts=4 expandtab syntax=python