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# First Aid Kit - diagnostic and repair tool for Linux
# Copyright (C) 2007 Martin Sivak <msivak@redhat.com>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
import os
import sys
from plugins import PluginSystem
from reporting import Reports, TASKER, PLUGINSYSTEM, FIRSTAIDKIT
import logging
import copy
from errors import *
from utils import FileBackupStore
from dependency import Dependencies
from configuration import Info
class Tasker:
"""The main interpret of tasks described in Config object"""
name = "Task interpreter"
def __init__(self, cfg, reporting = None, dependencies = None,
backups = None, pluginsystem = None):
self._config = cfg
self._running = True
if dependencies is None:
self._provide = Dependencies()
else:
self._provide = dependencies
if reporting is None:
self._reporting = Reports()
else:
self._reporting = reporting
if backups is None:
if cfg.backup.fullpath:
# rootpath is silly if fullpath is set by user.
cfg.backup.rootpath = ""
self._backups = FileBackupStore(rootpath = cfg.backup.rootpath,
fullpath = cfg.backup.fullpath)
cfg.backup.fullpath = self._backups._path
else:
self._backups = backups
if pluginsystem is None:
self.pluginSystem = PluginSystem(interpret = self, reporting = self._reporting,
dependencies = self._provide, backups = self._backups)
else:
self.pluginSystem = pluginsystem
def interrupt(self):
self._running = False
self._reporting.info("You sent an interrupt signal to "
"Tasker! This is not recommended.", level = TASKER,
origin = self, importance = logging.WARNING)
def continuing(self):
return self._running
def flags(self):
return self._provide
def reporting(self):
return self._reporting
def pluginsystem(self):
return self.pluginSystem
def end(self):
"""Signalize end of operations to all necessary places"""
self._reporting.end(level = FIRSTAIDKIT)
def run(self):
self._reporting.start(level = TASKER, origin = self)
pluginSystem = self.pluginSystem
# Reset the flag state
self._provide.reset()
# Check the root privilegies
if os.geteuid() == 0:
self._reporting.info("You are running the firstaidkit as root.",
level = TASKER, origin = self, importance = logging.WARNING)
self._provide.provide("root")
else:
self._reporting.info("You are not running the firstaidkit as "
"root. Some plugins may not be available.", level = TASKER,
origin = self, importance = logging.WARNING)
self._provide.unprovide("root")
#initialize the startup set of flags
for flag in self._config.operation._list("flags"):
self._provide.provide(flag)
# For the auto, auto-flow, plugin, flow cases.
if self._config.operation.mode in ("auto", "auto-flow", "plugin",
"flow"):
if self._config.operation.mode == "plugin":
pluginlist = self._config.operation._list("plugin")
else:
pluginlist = set(pluginSystem.list())
if self._config.operation.mode == "auto-flow":
flows = len(pluginlist)*[self._config.operation.flow]
elif self._config.operation.mode == "flow":
flows = self._config.operation._list("flow")
pluginlist = self._config.operation._list("plugin")
else:
flows = len(pluginlist)*[None]
#iterate through plugins until there is no plugin left or no
#action performed during whole iteration
oldlist = set()
actlist = set(zip(pluginlist, flows))
self._running = True
while self._running and len(actlist)>0 and oldlist!=actlist:
oldlist = copy.copy(actlist)
for plugin,flow in oldlist:
#If interruption was requested, stop
if not self._running:
break
#If plugin does not contain the automated flow or if
#it ran correctly, remove it from list
if ((flow and
not flow in pluginSystem.getplugin(plugin).getFlows())
or (not flow and
not pluginSystem.getplugin(plugin).default_flow in
pluginSystem.getplugin(plugin).getFlows())):
self._reporting.info("Plugin %s does not contain "
"flow %s"% (plugin, flow or \
pluginSystem.getplugin(plugin).default_flow,), \
level = TASKER, origin = self)
actlist.remove((plugin, flow))
elif (pluginSystem.autorun(plugin, flow = flow,
dependencies = self._config.operation.dependencies
!= "False")):
actlist.remove((plugin, flow))
#some plugins may not be called because of unfavorable flags
if self._running:
for plugin in set(map(lambda x: x[0], actlist)):
self._reporting.info("Plugin %s was not called because of "
"unsatisfied dependencies"% (plugin,), level = TASKER, \
origin = self, importance = logging.WARNING)
# For the flags case
elif self._config.operation.mode == "flags":
self._reporting.table(self._provide.known(), level = TASKER,
origin = self, title = "List of flags")
# For the list case
elif self._config.operation.mode == "list":
#get list of plugins
rep = []
for k in pluginSystem.list():
p = pluginSystem.getplugin(k)
flowinfo = [(f, p.getFlow(f).description) for f in p.getFlows()]
rep.append((k, p.name, p.version, p.author, p.description,
p.default_flow, flowinfo))
self._reporting.table(rep, level = TASKER, origin = self,
title = "List of plugins")
# For the info case
elif self._config.operation.mode == "info":
#get info about plugin
try:
p = pluginSystem.getplugin(self._config.operation.params)
except KeyError:
self._reporting.info(message = "No such plugin '%s'" % \
(self._config.operation.params,), level = TASKER, \
origin = self)
return False
flowinfo = [ (f, p.getFlow(f).description) for f in p.getFlows() ]
rep = {"id": self._config.operation.params, "name": p.name,
"version": p.version, "author": p.author,
"description": p.description, "flow": p.default_flow,
"flows": flowinfo}
self._reporting.tree(rep, level = TASKER, origin = self,
title = "Information about plugin %s" % \
(self._config.operation.params,))
# Any other case
else:
self._reporting.info(message = "Incorrect task specified", \
level = TASKER, origin = self)
self._reporting.stop(level = TASKER, origin = self)
return False
if self._config.operation.printinfo:
Info.write()
self._reporting.stop(level = TASKER, origin = self)
return True
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