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|
#
# flags.py: global anaconda flags
#
# Copyright (C) 2001 Red Hat, Inc. All rights reserved.
#
# 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, see <http://www.gnu.org/licenses/>.
#
import os
import selinux
import shlex
import glob
from constants import *
from collections import OrderedDict
import logging
log = logging.getLogger("anaconda")
# A lot of effort, but it only allows a limited set of flags to be referenced
class Flags(object):
def __setattr__(self, attr, val):
# pylint: disable-msg=E1101
if attr not in self.__dict__ and not self._in_init:
raise AttributeError, attr
else:
self.__dict__[attr] = val
def get(self, attr, val=None):
return getattr(self, attr, val)
def set_cmdline_bool(self, flag):
if flag in self.cmdline:
setattr(self, flag, self.cmdline.getbool(flag))
def __init__(self, read_cmdline=True):
self.__dict__['_in_init'] = True
self.test = 0
self.livecdInstall = 0
self.dlabel = 0
self.ibft = 1
self.iscsi = 0
self.serial = 0
self.autostep = 0
self.autoscreenshot = 0
self.usevnc = 0
self.vncquestion = True
self.mpath = 1
self.dmraid = 1
self.selinux = SELINUX_DEFAULT
self.debug = 0
self.targetarch = None
self.useIPv4 = True
self.useIPv6 = True
self.armPlatform = None
self.preexisting_x11 = False
self.noverifyssl = False
self.imageInstall = False
self.automatedInstall = False
self.dirInstall = False
self.askmethod = False
# for non-physical consoles like some ppc and sgi altix,
# we need to preserve the console device and not try to
# do things like bogl on them. this preserves what that
# device is
self.virtpconsole = None
self.gpt = False
self.leavebootorder = False
self.testing = False
# ksprompt is whether or not to prompt for missing ksdata
self.ksprompt = True
# parse the boot commandline
self.cmdline = BootArgs()
# Lock it down: no more creating new flags!
self.__dict__['_in_init'] = False
if read_cmdline:
self.read_cmdline()
def read_cmdline(self):
for f in ("selinux", "debug", "leavebootorder", "testing"):
self.set_cmdline_bool(f)
if "rpmarch" in self.cmdline:
self.targetarch = self.cmdline.get("rpmarch")
if not selinux.is_selinux_enabled():
self.selinux = 0
if "gpt" in self.cmdline:
self.gpt = True
cmdline_files = ['/proc/cmdline', '/run/install/cmdline',
'/run/install/cmdline.d/*.conf', '/etc/cmdline']
class BootArgs(OrderedDict):
"""
Hold boot arguments as an OrderedDict.
"""
def __init__(self, cmdline=None, files=cmdline_files):
"""
Create a BootArgs object.
Reads each of the "files", then parses "cmdline" if it was provided.
"""
OrderedDict.__init__(self)
if files:
self.read(files)
if cmdline:
self.readstr(cmdline)
def read(self, filenames):
"""
Read and parse a filename (or a list of filenames).
Files that can't be read are silently ignored.
Returns a list of successfully read files.
filenames can contain *, ?, and character ranges expressed with []
"""
readfiles = []
if type(filenames) == str:
filenames = [filenames]
# Expand any filename globs
filenames = [f for g in filenames for f in glob.glob(g)]
for f in filenames:
try:
self.readstr(open(f).read())
readfiles.append(f)
except IOError:
continue
return readfiles
def readstr(self, cmdline):
cmdline = cmdline.strip()
# if the BOOT_IMAGE contains a space, pxelinux will strip one of the
# quotes leaving one at the end that shlex doesn't know what to do
# with
(left, middle, right) = cmdline.rpartition("BOOT_IMAGE=")
if right.count('"') % 2:
cmdline = left + middle + '"' + right
lst = shlex.split(cmdline)
for i in lst:
if "=" in i:
(key, val) = i.split("=", 1)
else:
key = i
val = None
self[key] = val
def getbool(self, arg, default=False):
"""
Return the value of the given arg, as a boolean. The rules are:
- "arg", "arg=val": True
- "noarg", "noarg=val", "arg=[0|off|no]": False
"""
result = default
for a in self:
if a == arg:
if self[arg] in ("0", "off", "no"):
result = False
else:
result = True
elif a == 'no'+arg:
result = False # XXX: should noarg=off -> True?
return result
def can_touch_runtime_system(msg):
"""
Guard that should be used before doing actions that modify runtime system.
@param msg: message to be logged in case that runtime system cannot be touched
@rtype: bool
"""
if flags.livecdInstall:
log.info("Not doing '%s' in live installation" % msg)
return False
if flags.imageInstall:
log.info("Not doing '%s' in image installation" % msg)
return False
if flags.dirInstall:
log.info("Not doing '%s' in directory installation" % msg)
return False
if flags.testing:
log.info("Not doing '%s', because we are just testing" % msg)
return False
return True
global flags
flags = Flags()
|
