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#!/usr/bin/env python
from binascii import a2b_base64
from grp import getgrgid, getgrnam
from os import chown, chmod, lstat, mkdir, stat, system, unlink, rename, readlink, symlink
from pwd import getpwuid, getpwnam
from stat import *
from string import join, split
from sys import exc_info
from time import asctime, localtime
from traceback import extract_tb
from elementtree.ElementTree import Element, SubElement, tostring
def print_failure():
if '-v' in argv: print "\033[60G[\033[1;31mFAILED\033[0;39m]\r"
def print_success():
if '-v' in argv: print "\033[60G[ \033[1;32mOK\033[0;39m ]\r"
def CalcPerms(initial,perms):
tempperms = initial
if len(perms) == 3: perms = '0%s'%(perms)
(s,u,g,o) = map(int, map(lambda x:perms[x], range(4)))
if s & 1:
tempperms |= S_ISVTX
if s & 2:
tempperms |= S_ISGID
if s & 4:
tempperms |= S_ISUID
if u & 1:
tempperms |= S_IXUSR
if u & 2:
tempperms |= S_IWUSR
if u & 4:
tempperms |= S_IRUSR
if g & 1:
tempperms |= S_IXGRP
if g & 2:
tempperms |= S_IWGRP
if g & 4:
tempperms |= S_IRGRP
if o & 1:
tempperms |= S_IXOTH
if o & 2:
tempperms |= S_IWOTH
if o & 4:
tempperms |= S_IROTH
return tempperms
class Toolset(object):
__important__ = []
def __init__(self, cfg, setup):
self.setup = setup
self.cfg = cfg
self.states = {}
self.structures = {}
self.modified = []
self.extra = []
if self.__important__:
for c in cfg.findall(".//ConfigFile"):
for name in self.__important__:
if c.get("name") == name:
self.InstallConfigFile(c)
def LogFailure(self, area, entry):
'''Print tracebacks in unexpected cases'''
print "Failure in %s for entry: %s"%(area, tostring(entry))
(t,v,tb) = exc_info()
for line in extract_tb(tb):
print "File %s, line %i, in %s\n %s\n"%(line)
print "%s: %s\n"%(t,v)
del t,v,tb
# These next functions form the external API
def Inventory(self):
# build initial set of states
unexamined = map(lambda x:(x,[]), self.cfg.getchildren())
while unexamined:
(r, modlist) = unexamined.pop()
if r.tag not in ['Bundle', 'Independant']:
self.VerifyEntry(r, modlist)
else:
modlist = [x.attrib['name'] for x in r.getchildren() if x.tag == 'ConfigFile']
unexamined += map(lambda x:(x,modlist), r.getchildren())
self.structures[r] = False
for structure in self.cfg.getchildren():
self.CheckStructure(structure)
def CheckStructure(self, structure):
'''Check structures with bundle verification semantics'''
if structure in self.modified:
self.modified.remove(structure)
if structure.tag == 'Bundle':
# check for clobbered data
modlist = [x.attrib['name'] for x in structure.getchildren() if x.tag == 'ConfigFile']
for entry in structure.getchildren():
self.VerifyEntry(entry, modlist)
try:
state = map(lambda x:self.states[x], structure.getchildren())
if False not in state:
self.structures[structure] = True
except KeyError, k:
print "State verify evidently failed for %s"%(k)
self.structures[structure] = False
def Install(self):
self.modified = [k for (k,v) in self.structures.iteritems() if not v]
for entry in [k for (k,v) in self.states.iteritems() if not v]:
self.InstallEntry(entry)
def Commit(self):
'''Commit pending changes to the system. This method allows for interrelated
operations to be executed concurrently'''
return
def GenerateStats(self):
'''Generate XML summary of execution statistics'''
stats = Element("Statistics")
SubElement(stats, "Structures", good=str(len([k for k,v in self.structures.iteritems() if v])), \
bad=str(len([k for k,v in self.structures.iteritems() if not v])))
SubElement(stats, "Entries", good=str(len([k for k,v in self.states.iteritems() if v])), \
bad=str(len([k for k,v in self.states.iteritems() if not v])))
if len([k for k,v in self.structures.iteritems() if not v]) == 0:
stats.attrib['state'] = 'clean'
else:
stats.attrib['state'] = 'dirty'
stats.attrib['time'] = asctime(localtime())
return stats
# the next two are dispatch functions
def VerifyEntry(self, entry, modlist = []):
'''Dispatch call to Verify<tagname> and save state in self.states'''
try:
method = getattr(self, "Verify%s"%(entry.tag))
# verify state and stash value in state
if entry.tag == 'Package':
self.states[entry] = method(entry, modlist)
else:
self.states[entry] = method(entry)
if self.setup['debug']:
print entry.attrib['name'], self.states[entry]
except:
self.LogFailure("Verify", entry)
def InstallEntry(self, entry):
'''Dispatch call to self.Install<tagname>'''
try:
method = getattr(self, "Install%s"%(entry.tag))
self.states[entry] = method(entry)
except:
self.LogFailure("Install", entry)
# All remaining operations implement the mechanics of POSIX cfg elements
def VerifySymLink(self, entry):
try:
s = readlink(entry.attrib['name'])
if s == entry.attrib['to']:
return True
return False
except OSError:
return False
def InstallSymLink(self, entry):
try:
fmode = lstat(entry.attrib['name'])[ST_MODE]
if S_ISREG(fmode) or S_ISLNK(fmode):
unlink(entry.attrib['name'])
elif S_ISDIR(fmode):
system("mv %s/ %s.bak"%(entry.attrib['name'], entry.attrib['name']))
else:
unlink(entry.attrib['name'])
except OSError, e:
pass
try:
symlink(entry.attrib['to'], entry.attrib['name'])
except OSError, e:
return False
def VerifyDirectory(self, entry):
try:
ondisk=stat(entry.attrib['name'])
except OSError:
return False
try:
owner=getpwuid(ondisk[ST_UID])[0]
group=getgrgid(ondisk[ST_GID])[0]
except OSError:
owner='root'
group='root'
perms=stat(entry.attrib['name'])[ST_MODE]
if ((owner == entry.attrib['owner']) and
(group == entry.attrib['group']) and
(perms == CalcPerms(S_IFDIR, entry.attrib['perms']))):
return True
else:
return False
def InstallDirectory(self, entry):
try:
fmode = lstat(entry.attrib['name'])
if not S_ISDIR(fmode[0]):
try:
unlink(entry.attrib['name'])
except:
return False
except OSError:
pass
try:
mkdir(entry.attrib['name'])
except OSError:
return False
try:
chown(entry.attrib['name'],getpwnam(self.attrib['owner'])[2],getgrnam(entry.attrib['group'])[2])
chmod(entry.attrib['name'],entry.attrib['perms'])
except:
return False
def VerifyConfigFile(self, entry):
try:
ondisk=stat(entry.attrib['name'])
except OSError:
return False
try:
data=open(entry.attrib['name']).read()
except IOError:
return False
try:
owner=getpwuid(ondisk[ST_UID])[0]
group=getgrgid(ondisk[ST_GID])[0]
except KeyError:
return False
perms=stat(entry.attrib['name'])[ST_MODE]
if entry.attrib.get('encoding', 'ascii') == 'base64':
tempdata = a2b_base64(entry.text)
else:
tempdata = entry.text
if ((data == tempdata) and (owner == entry.attrib['owner']) and
(group == entry.attrib['group']) and (perms == CalcPerms(S_IFREG, entry.attrib['perms']))):
return True
return False
def InstallConfigFile(self, entry):
if self.setup['dryrun'] or self.setup['verbose']:
print "Installing ConfigFile %s"%(entry.attrib['name'])
if self.setup['dryrun']:
return False
parent = join(split(entry.attrib['name'],"/")[:-1],"/")
if parent:
try:
s = lstat(parent)
try:
if not S_ISDIR(s[ST_MODE]):
unlink(parent)
mkdir(parent)
except OSError:
return False
except OSError:
# need to handle mkdir -p case
mkdir(parent)
# If we get here, then the parent directory should exist
try:
newfile = open("%s.new"%(entry.attrib['name']), 'w')
if entry.attrib.get('encoding', 'ascii') == 'base64':
filedata = a2b_base64(entry.text)
else:
filedata = entry.text
newfile.write(filedata)
newfile.close()
chown(newfile.name, getpwnam(entry.attrib['owner'])[2], getgrnam(entry.attrib['group'])[2])
chmod(newfile.name, CalcPerms(S_IFREG, entry.attrib['perms']))
if entry.attrib.get("paranoid", False) and setup.get("paranoid", False):
system("diff -u %s %s.new"%(entry.attrib['name'], entry.attrib['name']))
rename(newfile.name, entry.attrib['name'])
return True
except (OSError, IOError), e:
print e
return False
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