def _GenService(self, name, cfg):
# Merge the config values.
service = rdf_client.LinuxServiceInformation(name=name)
service.config = self._GenConfig(cfg)
if service.config.disable == ["no"]:
service.starts = True
service.start_mode = "XINETD"
service.start_after = ["xinetd"]
return service
def _ParseInit(self, init_files):
init_lexer = LSBInitLexer()
for path, file_obj in init_files:
init = init_lexer.ParseEntries(file_obj.read())
if init:
service = rdf_client.LinuxServiceInformation()
service.name = init.get("provides")
service.start_mode = "INIT"
service.start_on = GetRunlevelsLSB(init.get("default-start"))
if service.start_on:
service.starts = True
service.stop_on = GetRunlevelsLSB(init.get("default-stop"))
service.description = init.get("short-description")
service.start_after = self._Facilities(init.get("required-start", []))
service.stop_after = self._Facilities(init.get("required-stop", []))
yield service
else:
logging.debug("No runlevel information found in %s", path)
def ParseFiles(
self,
knowledge_base: rdf_client.KnowledgeBase,
pathspecs: Iterable[rdf_paths.PathSpec],
filedescs: Iterable[IO[bytes]],
) -> Iterator[rdf_client.LinuxServiceInformation]:
"""Identify the init scripts and the start/stop scripts at each runlevel.
Evaluate all the stat entries collected from the system.
If the path name matches a runlevel spec, and if the filename matches a
sysv init symlink process the link as a service.
Args:
knowledge_base: A client's knowledge base.
pathspecs: A list of path description for collected files.
filedescs: A list of file descriptors of collected files.
Yields:
rdf_client.LinuxServiceInformation for each detected service.
"""
del knowledge_base, filedescs # Unused.
services = {}
for pathspec in pathspecs:
path = pathspec.path
runlevel = self.runlevel_re.match(os.path.dirname(path))
runscript = self.runscript_re.match(os.path.basename(path))
if runlevel and runscript:
svc = runscript.groupdict()
service = services.setdefault(
svc["name"],
rdf_client.LinuxServiceInformation(name=svc["name"],
start_mode="INIT"))
runlvl = GetRunlevelsNonLSB(runlevel.group(1))
if svc["action"] == "S" and runlvl:
service.start_on.append(runlvl.pop())
service.starts = True
elif runlvl:
service.stop_on.append(runlvl.pop())
for svc in services.values():
yield svc
def ParseMultiple(self, stats, unused_file_obj, unused_kb):
"""Identify the init scripts and the start/stop scripts at each runlevel.
Evaluate all the stat entries collected from the system.
If the path name matches a runlevel spec, and if the filename matches a
sysv init symlink process the link as a service.
Args:
stats: An iterator of StatEntry rdfs.
unused_file_obj: An iterator of file contents. Not needed as the parser
only evaluates link attributes.
unused_kb: Unused KnowledgeBase rdf.
Yields:
rdf_anomaly.Anomaly if the startup link seems wierd.
rdf_client.LinuxServiceInformation for each detected service.
"""
services = {}
for stat_entry in stats:
path = stat_entry.pathspec.path
runlevel = self.runlevel_re.match(os.path.dirname(path))
runscript = self.runscript_re.match(os.path.basename(path))
if runlevel and runscript:
svc = runscript.groupdict()
service = services.setdefault(
svc["name"],
rdf_client.LinuxServiceInformation(
name=svc["name"], start_mode="INIT"))
runlvl = GetRunlevelsNonLSB(runlevel.group(1))
if svc["action"] == "S" and runlvl:
service.start_on.append(runlvl.pop())
service.starts = True
elif runlvl:
service.stop_on.append(runlvl.pop())
if not stat.S_ISLNK(int(stat_entry.st_mode)):
yield rdf_anomaly.Anomaly(
type="PARSER_ANOMALY",
finding=[path],
explanation="Startup script is not a symlink.")
for svc in itervalues(services):
yield svc
