Current File : //snap/core20/2379/lib/python3/dist-packages/probert/utils.py
from copy import deepcopy
import glob
import itertools
import os
import re
import pyudev
NET_CONFIG_OPTIONS = [
"address", "netmask", "broadcast", "network", "metric", "gateway",
"pointtopoint", "media", "mtu", "hostname", "leasehours", "leasetime",
"vendor", "client", "bootfile", "server", "hwaddr", "provider", "frame",
"netnum", "endpoint", "local", "ttl",
]
NET_CONFIG_COMMANDS = [
"pre-up", "up", "post-up", "down", "pre-down", "post-down",
]
NET_CONFIG_BRIDGE_OPTIONS = [
"bridge_ageing", "bridge_bridgeprio", "bridge_fd", "bridge_gcinit",
"bridge_hello", "bridge_maxage", "bridge_maxwait", "bridge_stp",
]
# sysfs size attribute is always in 512-byte units
# https://github.com/torvalds/linux/blob/6f0d349d922ba44e4348a17a78ea51b7135965b1/include/linux/types.h#L125
SECTOR_SIZE_BYTES = 512
# from juju-deployer utils.relation_merge
def dict_merge(onto, source):
target = deepcopy(onto)
# Support list of relations targets
if isinstance(onto, list) and isinstance(source, list):
target.extend(source)
return target
for (key, value) in source.items():
if key in target:
if isinstance(target[key], dict) and isinstance(value, dict):
target[key] = dict_merge(target[key], value)
elif isinstance(target[key], list) and isinstance(value, list):
target[key] = list(set(target[key] + value))
else:
target[key] = value
return target
if pyudev.__version_info__ < (0, 18):
def udev_get_attributes(device):
r = {}
for key in device.attributes:
val = device.attributes.get(key)
if isinstance(val, bytes):
val = val.decode('utf-8', 'replace')
r[key] = val
return r
else:
def udev_get_attributes(device):
r = {}
for key in device.attributes.available_attributes:
val = device.attributes.get(key)
if isinstance(val, bytes):
val = val.decode('utf-8', 'replace')
r[key] = val
return r
# split lists into N lists by predicate
def partitionn2(items, predicate=int, n=2):
return ((lambda i, tee: (item for pred, item in tee if pred == i))(x, t)
for x, t in enumerate(itertools.tee(((predicate(item), item)
for item in items), n)))
# unpack generators into key, value pair
# where key is first item (list[0]) and
# value is remainder (list[1:])
def partition_to_pair(input):
"""Unpack a partition into a tuple of (first partition, second partition)
param: partition iterator from partitionn2
"""
items = input.split()
partitions = partitionn2(items=items,
predicate=lambda x: items.index(x) != 0,
n=2)
data = [list(p) for p in partitions]
[key], value = data
return key, value
def disentagle_data_from_whitespace(data):
# disentagle the data from whitespace
return [x.split(';')[0].strip() for x in data.split('\n')
if len(x)]
def dictify_lease(lease):
"""Transform lease string into dictionary of attributes
params: lease: string if a dhcp lease structure { to }
"""
lease_dict = {}
options = {}
for line in disentagle_data_from_whitespace(lease):
if len(line) <= 0:
continue
key, value = partition_to_pair(line)
if key == 'option':
options.update({value[0]: value[1]})
else:
value = " ".join(value)
lease_dict.update({key: value})
lease_dict.update({'options': options})
return lease_dict
def parse_dhclient_leases_file(leasedata):
"""Parses dhclient leases file data, returning dictionary of leases
:param leasesdata: string of lease data read from leases file
"""
return [dictify_lease(lease) for lease in
re.findall(r'{([^{}]*)}', leasedata.replace('"', ''))]
def parse_networkd_lease_file(leasedata):
"""Parses systemd/networkd/netif lease data, returns dict"""
lease = {}
for line in leasedata.split('\n'):
if line.startswith('#') or len(line) < 1:
continue
keyvalue = line.split('=')
lease[keyvalue[0].lower()] = keyvalue[1]
return lease
def get_dhclient_d():
# find lease files directory
supported_dirs = ["/var/lib/dhcp", "/var/lib/dhclient"]
for d in supported_dirs:
if os.path.exists(d):
return d
return None
def parse_etc_network_interfaces(ifaces, contents, path):
"""Parses the file contents, placing result into ifaces.
:param ifaces: interface dictionary
:param contents: contents of interfaces file
:param path: directory interfaces file was located
"""
currif = None
src_dir = path
for line in contents.splitlines():
line = line.strip()
if line.startswith('#'):
continue
split = line.split(' ')
option = split[0]
if option == "source-directory":
src_dir = os.path.join(path, split[1])
elif option == "source":
src_path = os.path.join(src_dir, split[1])
for src_file in glob.glob(src_path):
with open(src_file, "r") as fp:
src_data = fp.read().strip()
parse_etc_network_interfaces(
ifaces, src_data,
os.path.dirname(os.path.abspath(src_file)))
elif option == "auto":
for iface in split[1:]:
if iface not in ifaces:
ifaces[iface] = {}
ifaces[iface]['auto'] = True
elif option == "iface":
iface, family, method = split[1:4]
if iface not in ifaces:
ifaces[iface] = {}
elif 'family' in ifaces[iface]:
raise Exception("Cannot define %s interface again.")
ifaces[iface]['family'] = family
ifaces[iface]['method'] = method
currif = iface
elif option == "hwaddress":
ifaces[currif]['hwaddress'] = split[1]
elif option in NET_CONFIG_OPTIONS:
ifaces[currif][option] = split[1]
elif option in NET_CONFIG_COMMANDS:
if option not in ifaces[currif]:
ifaces[currif][option] = []
ifaces[currif][option].append(' '.join(split[1:]))
elif option.startswith('dns-'):
if 'dns' not in ifaces[currif]:
ifaces[currif]['dns'] = {}
if option == 'dns-search':
ifaces[currif]['dns']['search'] = []
for domain in split[1:]:
ifaces[currif]['dns']['search'].append(domain)
elif option == 'dns-nameservers':
ifaces[currif]['dns']['nameservers'] = []
for server in split[1:]:
ifaces[currif]['dns']['nameservers'].append(server)
elif option.startswith('bridge_'):
if 'bridge' not in ifaces[currif]:
ifaces[currif]['bridge'] = {}
if option in NET_CONFIG_BRIDGE_OPTIONS:
bridge_option = option.replace('bridge_', '')
ifaces[currif]['bridge'][bridge_option] = split[1]
elif option == "bridge_ports":
ifaces[currif]['bridge']['ports'] = []
for iface in split[1:]:
ifaces[currif]['bridge']['ports'].append(iface)
elif option == "bridge_hw" and split[1].lower() == "mac":
ifaces[currif]['bridge']['mac'] = split[2]
elif option == "bridge_pathcost":
if 'pathcost' not in ifaces[currif]['bridge']:
ifaces[currif]['bridge']['pathcost'] = {}
ifaces[currif]['bridge']['pathcost'][split[1]] = split[2]
elif option == "bridge_portprio":
if 'portprio' not in ifaces[currif]['bridge']:
ifaces[currif]['bridge']['portprio'] = {}
ifaces[currif]['bridge']['portprio'][split[1]] = split[2]
for iface in ifaces.keys():
if 'auto' not in ifaces[iface]:
ifaces[iface]['auto'] = False
def read_sys_block_size_bytes(device):
""" /sys/class/block/<device>/size and return integer value in bytes"""
device_dir = os.path.join('/sys/class/block', os.path.basename(device))
blockdev_size = os.path.join(device_dir, 'size')
with open(blockdev_size) as d:
size = int(d.read().strip()) * SECTOR_SIZE_BYTES
return size
def read_sys_block_slaves(device):
device_dir = os.path.join('/sys/class/block', os.path.basename(device))
return os.listdir(os.path.join(device_dir, 'slaves'))
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