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Mini Shell
Mini Shell
# -*- coding: utf-8 -*-
'''
Module for viewing and modifying sysctl parameters
'''
from __future__ import absolute_import, print_function, unicode_literals
import os
import re
# Import salt libs
from salt.ext import six
import salt.utils.data
import salt.utils.files
import salt.utils.stringutils
from salt.exceptions import CommandExecutionError
# Define the module's virtual name
__virtualname__ = 'sysctl'
def __virtual__():
'''
Only run on NetBSD systems
'''
if __grains__['os'] == 'NetBSD':
return __virtualname__
return (False, 'The netbsd_sysctl execution module failed to load: '
'only available on NetBSD.')
def show(config_file=False):
'''
Return a list of sysctl parameters for this minion
CLI Example:
.. code-block:: bash
salt '*' sysctl.show
'''
roots = (
'kern',
'vm',
'vfs',
'net',
'hw',
'machdep',
'user',
'ddb',
'proc',
'emul',
'security',
'init'
)
cmd = 'sysctl -ae'
ret = {}
out = __salt__['cmd.run'](cmd, output_loglevel='trace')
comps = ['']
for line in out.splitlines():
if any([line.startswith('{0}.'.format(root)) for root in roots]):
comps = re.split('[=:]', line, 1)
ret[comps[0]] = comps[1]
elif comps[0]:
ret[comps[0]] += '{0}\n'.format(line)
else:
continue
return ret
def get(name):
'''
Return a single sysctl parameter for this minion
CLI Example:
.. code-block:: bash
salt '*' sysctl.get hw.physmem
'''
cmd = 'sysctl -n {0}'.format(name)
out = __salt__['cmd.run'](cmd, python_shell=False)
return out
def assign(name, value):
'''
Assign a single sysctl parameter for this minion
CLI Example:
.. code-block:: bash
salt '*' sysctl.assign net.inet.icmp.icmplim 50
'''
ret = {}
cmd = 'sysctl -w {0}="{1}"'.format(name, value)
data = __salt__['cmd.run_all'](cmd, python_shell=False)
if data['retcode'] != 0:
raise CommandExecutionError('sysctl failed: {0}'.format(
data['stderr']))
new_name, new_value = data['stdout'].split(':', 1)
ret[new_name] = new_value.split(' -> ')[-1]
return ret
def persist(name, value, config='/etc/sysctl.conf'):
'''
Assign and persist a simple sysctl parameter for this minion
CLI Example:
.. code-block:: bash
salt '*' sysctl.persist net.inet.icmp.icmplim 50
'''
nlines = []
edited = False
value = six.text_type(value)
# create /etc/sysctl.conf if not present
if not os.path.isfile(config):
try:
with salt.utils.files.fopen(config, 'w+'):
pass
except (IOError, OSError):
msg = 'Could not create {0}'
raise CommandExecutionError(msg.format(config))
with salt.utils.files.fopen(config, 'r') as ifile:
for line in ifile:
line = salt.utils.stringutils.to_unicode(line)
m = re.match(r'{0}(\??=)'.format(name), line)
if not m:
nlines.append(line)
continue
else:
key, rest = line.split('=', 1)
if rest.startswith('"'):
_, rest_v, rest = rest.split('"', 2)
elif rest.startswith('\''):
_, rest_v, rest = rest.split('\'', 2)
else:
rest_v = rest.split()[0]
rest = rest[len(rest_v):]
if rest_v == value:
return 'Already set'
new_line = '{0}{1}{2}{3}'.format(name, m.group(1), value, rest)
nlines.append(new_line)
edited = True
if not edited:
newline = '{0}={1}'.format(name, value)
nlines.append("{0}\n".format(newline))
with salt.utils.files.fopen(config, 'wb') as ofile:
ofile.writelines(
salt.utils.data.encode(nlines)
)
assign(name, value)
return 'Updated'
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Zerion Mini Shell 1.0