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#!/usr/bin/python
import os
import shutil
import subprocess
import simplejson as json
import ConfigParser
CL_CONFIG = '/etc/sysconfig/cloudlinux'
HOOK_SECTION = 'hooks'
HOOK_SEPARATOR = ';'
DEBUG_STRING = 'python-cllib:clhook:'
def get_config(file_name):
'''
read config from file_name
return config
'''
config = ConfigParser.ConfigParser()
config.optionxform = str # make config case sensitive
config.read(file_name)
return config
def write_config(config, file_name, debug_local_name):
'''
write config to file_name
return [BOOLEAN_STATE, MESSAGE]
'''
try:
tmp_cfg_path = file_name + '.' + str(os.getpid())
tmpconfig = open(tmp_cfg_path,'w')
config.write(tmpconfig)
tmpconfig.close()
shutil.move(tmp_cfg_path, file_name)
except IOError:
return [False, debug_local_name + str(file_name) + ' write error\n']
return [True, 'OK\n']
def get_hook_list_from_file(hook_prefix, config_file = CL_CONFIG):
'''
return [BOOLEAN_STATE, hook_list]
'''
hook_list = []
config = get_config(config_file)
try:
hook_list = config.get(HOOK_SECTION, hook_prefix).split(HOOK_SEPARATOR)
except (ConfigParser.NoOptionError, ConfigParser.NoSectionError):
return [False, hook_list]
return [True, hook_list]
def register_hook(hook_path, hook_prefix, config_file = CL_CONFIG):
'''
add hook to config file
return [BOOLEAN_STATE, MESSAGE]
'''
debug_local_name = DEBUG_STRING + 'register_hook:'
config = get_config(config_file)
try:
hook_list = config.get(HOOK_SECTION, hook_prefix).split(HOOK_SEPARATOR)
if hook_path in hook_list:
return [True, debug_local_name + 'Hook ' + str(hook_path) + ' already registred\n' ]
hook_list.append(hook_path)
config.set(HOOK_SECTION, hook_prefix, HOOK_SEPARATOR.join(hook_list))
except ConfigParser.NoSectionError:
config.add_section(HOOK_SECTION)
config.set(HOOK_SECTION, hook_prefix, hook_path)
except ConfigParser.NoOptionError:
config.set(HOOK_SECTION, hook_prefix, hook_path)
return write_config(config, config_file, debug_local_name)
def unregister_hook(hook_path, hook_prefix, config_file = CL_CONFIG):
'''
remove hook from config_file
return [BOOLEAN_STATE, MESSAGE]
'''
debug_local_name = DEBUG_STRING + 'unregister_hook:'
hook_list = []
config = get_config(config_file)
try:
hook_list = config.get(HOOK_SECTION, hook_prefix).split(HOOK_SEPARATOR)
hook_list.remove(hook_path)
config.set(HOOK_SECTION, hook_prefix, HOOK_SEPARATOR.join(hook_list))
return write_config(config, config_file, debug_local_name)
except (ConfigParser.NoSectionError, ConfigParser.NoOptionError, ValueError):
return [True, 'OK\n']
def call_hook_list(hook_list, data):
'''
call hooks and send data as json to stdin
return [BOOLEAN_STATUS, message]
'''
debug_local_name = DEBUG_STRING + 'call_hook:'
json_encode = json.dumps(data)
for hook in hook_list:
if os.path.isfile(hook) and os.access(hook, os.X_OK):
try:
pipe = subprocess.Popen(hook, stdin=subprocess.PIPE, stdout = subprocess.PIPE, stderr=subprocess.PIPE)
pipe.stdin.write(json_encode)
pipe.communicate()
except OSError:
return [False, debug_local_name + 'Hook call error\n']
else:
return [False, debug_local_name + str(hook) + ' : isn`t file or isn`t runnable\n']
return [True, 'OK\n']