"""
dmsetup commands - Command ``dmsetup``
======================================
Parsers for parsing and extracting data from output of commands related to
``dmsetup``.
Parsers contained in this module are:
DmsetupInfo - command ``dmsetup info -C``
-----------------------------------------
"""
from collections import namedtuple
from insights import parser, CommandParser
from insights.parsers import parse_delimited_table
from insights.specs import Specs
SetupInfo = namedtuple('SetupInfo', [
'name', 'major', 'minor', 'open', 'segments', 'events',
'live_table', 'inactive_table', 'suspended', 'readonly', 'uuid']
)
""" Data structure to represent dmsetup information """
[docs]@parser(Specs.dmsetup_info)
class DmsetupInfo(CommandParser):
"""
``dmsetup info -C`` command output
Example input::
Name Maj Min Stat Open Targ Event UUID
VG00-tmp 253 8 L--w 1 1 0 LVM-gy9uAwD7LuTIApplr2sogbOx5iS0FTax6lLmBji2ueSbX49gxcV76M29cmukQiw4
VG00-home 253 3 L--w 1 1 0 LVM-gy9uAwD7LuTIApplr2sogbOx5iS0FTaxCqXOnbGe2zjhX923dFiIdl1oi7mO9tXp
VG00-var 253 6 L--w 1 2 0 LVM-gy9uAwD7LuTIApplr2sogbOx5iS0FTaxicvyvt67113nTb8vMlGfgdEjDx0LKT2O
VG00-swap 253 1 L--w 2 1 0 LVM-gy9uAwD7LuTIApplr2sogbOx5iS0FTax3Ll2XhOYZkylx1CjOQi7G4yHgrIOsyqG
VG00-root 253 0 L--w 1 1 0 LVM-gy9uAwD7LuTIApplr2sogbOx5iS0FTaxKpnAKYhrYMYMNMwjegkW965bUgtJFTRY
VG00-var_log_audit 253 5 L--w 1 1 0 LVM-gy9uAwD7LuTIApplr2sogbOx5iS0FTaxwQ8R0XWJRm86QX3befq1cHRy47Von6ZW
Example data structure produced::
data = [
{
'Stat': 'L--w',
'Name': 'VG00-tmp',
'Min': '8',
'Targ': '1',
'Maj': '253',
'Open': '1',
'Event': '0',
'UUID': 'LVM-gy9uAwD7LuTIApplr2sogbOx5iS0FTax6lLmBji2ueSbX49gxcV76M29cmukQiw4'
},...
]
Attributes:
data (list): List of devices found, in order
names (list): Device names, in order found
uuids (list): UUID
by_name (dict): Access to each device by devicename
by_uuid (dict): Access to each device by uuid
info (list): List of devices found, in order using SetupInfo structure
Example:
>>> len(setup_info)
6
>>> setup_info.names[0]
'VG00-tmp'
>>> setup_info[1]['Maj']
'253'
>>> setup_info[1]['Stat']
'L--w'
>>> setup_info.info[-1].name
'VG00-var_log_audit'
>>> setup_info.info[-1].major
253
>>> setup_info.info[-1].live_table
True
>>> setup_info.info[-1].readonly
False
"""
[docs] def parse_content(self, content):
self.data = parse_delimited_table(content)
self.names = [dm['Name'] for dm in self.data if 'Name' in dm]
self.by_name = dict((dm['Name'], dm) for dm in self.data if 'Name' in dm)
self.uuids = [dm['UUID'] for dm in self.data if 'UUID' in dm]
self.by_uuid = dict((dm['UUID'], dm) for dm in self.data if 'UUID' in dm)
self.info = []
for dm in self.data:
self.info.append(SetupInfo(
name=dm.get('Name'),
major=int(dm.get('Maj')) if 'Maj' in dm and dm.get('Maj').isdigit() else None,
minor=int(dm.get('Min')) if 'Min' in dm and dm.get('Min').isdigit() else None,
open=int(dm.get('Open')) if 'Open' in dm and dm.get('Open').isdigit() else None,
segments=int(dm.get('Targ')) if 'Targ' in dm and dm.get('Targ').isdigit() else None,
events=int(dm.get('Event')) if 'Event' in dm and dm.get('Event').isdigit() else None,
live_table=dm.get('Stat', '----')[0] == 'L',
inactive_table=dm.get('Stat', '----')[1] == 'I',
suspended=dm.get('Stat', '----')[2] == 's',
readonly=dm.get('Stat', '----')[3] == 'r',
uuid=dm.get('UUID')
))
def __len__(self):
"""
The length of the devices list
"""
return len(self.data)
def __iter__(self):
"""
Iterate through the devices list
"""
for dm in self.data:
yield dm
def __getitem__(self, idx):
"""
Fetch a device by index in devices list
"""
return self.data[idx]