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