#!/usr/bin/python
#
# Module for manipulation of lilo.conf files. Original found
# in the anaconda installer
# Copyright (c) 1999-2001 Red Hat, Inc. Distributed under GPL.
#
# Author: Matt Wilson <
[email protected]>
# Eric Troan <
[email protected]>
# Adrian Likins <
[email protected]>
"""Module for manipulation of lilo.conf files."""
import string
import os
import butil
from UserDict import UserDict
class UserDictCase(UserDict):
"""A dictionary with case insensitive keys"""
def __init__(self, data = {}):
UserDict.__init__(self)
# if we are passed a dictionary transfer it over...
for k in data.keys():
kl = string.lower(k)
self.data[kl] = data[k]
# some methods used to make the class work as a dictionary
def __setitem__(self, key, value):
key = string.lower(key)
self.data[key] = value
def __getitem__(self, key):
key = string.lower(key)
if not self.data.has_key(key):
return None
return self.data[key]
get = __getitem__
def __delitem__(self, key):
key = string.lower(key)
del self.data[key]
def has_key(self, key):
key = string.lower(key)
return self.data.has_key(key)
# return this data as a real hash
def get_hash(self):
return self.data
# return the data for marshalling
def __getstate__(self):
return self.data
# we need a setstate because of the __getstate__ presence screws up deepcopy
def __setstate__(self, state):
self.__init__(state)
# get a dictionary out of this instance ({}.update doesn't get instances)
def dict(self):
return self.data
def needsEnterpriseKernel():
rc = 0
try:
f = open("/proc/e820info", "r")
except IOError:
return 0
for l in f.readlines():
l = string.split(l)
if l[3] == '(reserved)': continue
regionEnd = (string.atol(l[0], 16) - 1) + string.atol(l[2], 16)
if regionEnd > 0xffffffffL:
rc = 1
return rc
class LiloConfigFile:
"""class representing a lilo.conf lilo configuration file. Used to
manipulate the file directly"""
def __repr__ (self, tab = 0):
s = ""
for n in self.order:
if (tab):
s = s + '\t'
if n[0] == '#':
s = s + n[1:]
else:
s = s + n
if self.items[n]:
s = s + "=" + self.items[n]
s = s + '\n'
for count in range(len(self.diskRemaps)):
s = s + "disk = %s\n" % self.diskRemaps[count][1]
s = s + "\tbios = %s\n" % self.biosRemaps[count][1]
for cl in self.images:
s = s + "\n%s=%s\n" % (cl.imageType, cl.path)
s = s + cl.__repr__(1)
return s
def addEntry(self, item, val = None, replace = 1):
if not self.items.has_key(item):
self.order.append(item)
elif not replace:
return
if (val):
self.items[item] = str(val)
else:
self.items[item] = None
def getEntry(self, item):
if self.items.has_key(item):
return self.items[item]
else:
return None
def delEntry(self, item):
newOrder = []
for i in self.order:
if item != i: newOrder.append(i)
self.order = newOrder
del self.items[item]
def listEntries(self):
foo = self.items
return foo
def testEntry(self, item):
if self.items.has_key(item):
return 1
else:
return 0
def getImage(self, label):
for config in self.images:
# sanity check
if label is None:
break
if config.getEntry('label'):
if string.lower(config.getEntry('label')) == string.lower(label):
return (config.imageType, config, config.path, config.other)
if config.getEntry('alias'):
if string.lower(config.getEntry('alias')) == string.lower(label):
return (config.imageType, config, config.path, config.other)
raise IndexError, "unknown image %s" % (label)
def addImage (self, config,first=None):
# make sure the config has a valid label
config.getEntry('label')
if not config.path or not config.imageType:
raise ValueError, "subconfig missing path or image type"
if first:
self.images = [config] + self.images
else:
self.images.append(config)
def delImage (self, label):
for config in self.images:
# sanity check
if label is None:
break
if config.getEntry('label'):
if string.lower(config.getEntry('label')) == string.lower(label):
self.images.remove (config)
return
raise IndexError, "unknown image %s" % (label,)
def getDefault (self):
default = None
try:
default = self.getEntry("default")
except:
pass
if not default:
default = self.listImages()[0]
theDefault = self.getImage(default)
return theDefault[1]
def getDefaultLinux (self):
defaultIsOther = None
# XXX ick... this code badly needs work =\
theDefault = self.getDefault()
if theDefault.other:
defaultIsOther = 1
# if the default is other, look for the first linux image
if theDefault.other:
for image_label in self.listImages():
image = self.getImage(image_label)[1]
if not image.other:
theDefault = image
break
# if we get here and are *still* an other, then we have no linux
# images. ick
if theDefault.other:
return None
else:
return theDefault
def listImages (self):
l = []
for config in self.images:
l.append(config.getEntry('label'))
return l
def listAliases (self):
l = []
for config in self.images:
if config.getEntry('alias'):
l.append(config.getEntry('alias'))
return l
def getPath (self):
return self.path
def write(self, file, perms = 0644):
f = open(file, "w")
f.write(self.__repr__())
f.close()
os.chmod(file, perms)
def read (self, file):
f = open(file, "r")
image = None
for l in f.readlines():
l = l[:-1]
orig = l
while (l and (l[0] == ' ' or l[0] == '\t')):
l = l[1:]
if not l:
continue
if l[0] == '#' and not image:
self.order.append('#' + orig)
continue
fields = string.split(l, '=', 1)
if l[0] == '#' and image:
args = ('#' + l,)
elif (len(fields) == 2):
f0 = string.strip (fields [0])
f1 = string.strip (fields [1])
if (f0 != "append"):
# people are silly and put quotes brokenly in their
# lilo.conf but you have to use them for append. ARGH!
f1 = string.replace(f1, '"', '')
f1 = string.replace(f1, "'", "")
if (f0 == "image" or f0 == "other"):
if image: self.addImage(image)
image = LiloConfigFile(imageType = f0,
path = f1)
if (f0 == "other"):
image.other = 1
args = None
else:
args = (f0, f1)
if (f0 == "disk"):
self.diskRemaps.append((f0,f1))
args = None
if (f0 == "bios"):
self.biosRemaps.append((f0,f1))
args = None
else:
args = (string.strip (l),)
if (args and image):
apply(image.addEntry, args)
elif args:
apply(self.addEntry, args)
if image: self.addImage(image)
f.close()
def __init__(self, imageType = None, path = None):
self.imageType = imageType
self.path = path
self.order = []
self.images = []
self.other = None
self.items = UserDictCase()
self.biosRemaps = []
self.diskRemaps = []
self.unsupported = []
if __name__ == "__main__":
import sys
#sys.path.append("")
config = LiloConfigFile ()
config.read ('/etc/lilo.conf')
print config
print "image list", config.listImages()
config.delImage ('linux')
print '----------------------------------'
config = LiloConfigFile ()
config.read ('/etc/lilo.conf')
print config
print '----------------------------------'
print '----------------------------------'
print "list images"
print config.listImages()
print config.getImage('linux')
print "----------------------------------"
print "addimage (testlinux)"
blip = """
read-only
blippy-blob=sdfsdf
append=\"sdfasdfasdf\"
root=/dev/hda6
"""
sl = LiloConfigFile(imageType = "image", path="/boot/somevmlinuz-2.4.0")
sl.addEntry("label", "newkernel")
sl.addEntry("initrd", "blipppy")
config.addImage(sl)
print '-------------------------------------'
print "writing out /tmp/lilo.conf"
print config.write("/tmp/lilo.conf")
print config
