def test_get_process_info_state_preserves_case(self):
"""
C{get_process_info} retains the case of the process state, since
for example both x and X can be different states.
"""
self._add_process_info(12, state="a (some state)")
process_info = ProcessInformation(self.proc_dir)
info = process_info.get_process_info(12)
self.assertEqual(b"a", info["state"])
def test_get_process_info_state(self):
"""
C{get_process_info} reads the process state from the status file
and uses the first character to represent the process state.
"""
self._add_process_info(12, state="A (some state)")
process_info = ProcessInformation(self.proc_dir)
info = process_info.get_process_info(12)
self.assertEqual(b"A", info["state"])
def __init__(self, proc_dir="/proc", boot_time=None, jiffies=None,
uptime=None, popen=subprocess.Popen):
super(ActiveProcessInfo, self).__init__()
self._proc_dir = proc_dir
self._persist_processes = {}
self._previous_processes = {}
self._jiffies_per_sec = jiffies or detect_jiffies()
self._popen = popen
self._first_run = True
self._process_info = ProcessInformation(proc_dir=proc_dir,
jiffies=jiffies,
boot_time=boot_time,
uptime=uptime)
def test_get_process_info_state_tracing_stop_lucid(self):
"""
In Lucid, capital T was used for both stopped and tracing stop.
From Natty and onwards lowercase t is used for tracing stop, so
we special-case that state and always return lowercase t for
tracing stop.
"""
self._add_process_info(12, state="T (tracing stop)")
self._add_process_info(13, state="t (tracing stop)")
process_info = ProcessInformation(self.proc_dir)
info1 = process_info.get_process_info(12)
info2 = process_info.get_process_info(12)
self.assertEqual(b"t", info1["state"])
self.assertEqual(b"t", info2["state"])
def run(self):
num_processes = 0
num_zombies = 0
info = ProcessInformation(proc_dir=self._proc_dir)
for process_info in info.get_all_process_info():
num_processes += 1
if process_info["state"] == "Z":
num_zombies += 1
if num_zombies:
if num_zombies == 1:
msg = "There is 1 zombie process."
else:
msg = "There are %d zombie processes." % (num_zombies, )
self._sysinfo.add_note(msg)
self._sysinfo.add_header("Processes", str(num_processes))
return succeed(None)
def test_missing_process_race(self, get_uptime_mock, list_dir_mock,
jiffies_mock):
"""
We use os.listdir("/proc") to get the list of active processes, if a
process ends before we attempt to read the process' information, then
this should not trigger an error.
"""
class FakeFile(object):
def __init__(self, response=""):
self._response = response
self.closed = False
def readline(self):
return self._response
def __iter__(self):
if self._response is None:
raise IOError("Fake file error")
else:
yield self._response
def close(self):
self.closed = True
list_dir_mock.return_value = ["12345"]
get_uptime_mock.return_value = 1.0
fakefile1 = FakeFile("test-binary")
fakefile2 = FakeFile(None)
with mock.patch(
"landscape.lib.process.open",
mock.mock_open(),
create=True,
) as open_mock:
# This means "return fakefile1, then fakefile2"
open_mock.side_effect = [fakefile1, fakefile2]
process_info = ProcessInformation("/proc")
processes = list(process_info.get_all_process_info())
calls = [
mock.call("/proc/12345/cmdline", "r"),
mock.call("/proc/12345/status", "r")
]
open_mock.assert_has_calls(calls)
self.assertEqual(processes, [])
list_dir_mock.assert_called_with("/proc")
self.assertTrue(fakefile1.closed)
self.assertTrue(fakefile2.closed)
def setUp(self):
LandscapeTest.setUp(self)
self.sample_dir = self.makeDir()
self.builder = ProcessDataBuilder(self.sample_dir)
self.process_info = ProcessInformation(proc_dir=self.sample_dir,
jiffies=1,
boot_time=10)
self.signaller = ProcessKiller(process_info=self.process_info)
service = self.broker_service
service.message_store.set_accepted_types(["operation-result"])
def _test_signal_real_process(self, signame):
"""
When a 'signal-process' message is received the plugin should
signal the appropriate process and generate an operation-result
message with details of the outcome. Data is gathered from
internal plugin methods to get the start time of the test
process being signalled.
"""
process_info_factory = ProcessInformation()
signaller = ProcessKiller()
signaller.register(self.manager)
popen = get_active_process()
process_info = process_info_factory.get_process_info(popen.pid)
self.assertNotEquals(process_info, None)
start_time = process_info["start-time"]
self.manager.dispatch_message({
"type": "signal-process",
"operation-id": 1,
"pid": popen.pid,
"name": "python",
"start-time": start_time,
"signal": signame
})
# We're waiting on the child process here so that we (the
# parent process) consume it's return code; this prevents it
# from becoming a zombie and makes the test do a better job of
# reflecting the real world.
return_code = popen.wait()
# The return code is negative if the process was terminated by
# a signal.
self.assertTrue(return_code < 0)
process_info = process_info_factory.get_process_info(popen.pid)
self.assertEqual(process_info, None)
service = self.broker_service
self.assertMessages(service.message_store.get_pending_messages(),
[{
"type": "operation-result",
"status": SUCCEEDED,
"operation-id": 1
}])
#!/usr/bin/env python3
from datetime import datetime
from landscape.lib.process import ProcessInformation
info = ProcessInformation()
for process_info in info.get_all_process_info():
if process_info['state'] == b'Z':
print(process_info['pid'], process_info['name'],
datetime.fromtimestamp(process_info['start-time']))
def __init__(self, process_info=None):
if process_info is None:
process_info = ProcessInformation()
self.process_info = process_info
class ActiveProcessInfo(DataWatcher):
message_type = "active-process-info"
scope = "process"
def __init__(self,
proc_dir="/proc",
boot_time=None,
jiffies=None,
uptime=None,
popen=subprocess.Popen):
super(ActiveProcessInfo, self).__init__()
self._proc_dir = proc_dir
self._persist_processes = {}
self._previous_processes = {}
self._jiffies_per_sec = jiffies or detect_jiffies()
self._popen = popen
self._first_run = True
self._process_info = ProcessInformation(proc_dir=proc_dir,
jiffies=jiffies,
boot_time=boot_time,
uptime=uptime)
def register(self, manager):
super(ActiveProcessInfo, self).register(manager)
self.call_on_accepted(self.message_type, self.exchange, True)
def _reset(self):
"""Reset active process data."""
self._first_run = True
self._persist_processes = {}
self._previous_processes = {}
def get_message(self):
message = {}
if self._first_run:
message["kill-all-processes"] = True
message.update(self._detect_process_changes())
if message:
message["type"] = "active-process-info"
return message
return None
def persist_data(self):
self._first_run = False
self._persist_processes = self._previous_processes
self._previous_processes = {}
# This forces the registry to write the persistent store to disk
# This means that the persistent data reflects the state of the
# messages sent.
self.registry.flush()
def _get_processes(self):
processes = {}
for process_info in self._process_info.get_all_process_info():
if process_info["state"] != b"X":
processes[process_info["pid"]] = process_info
return processes
def _detect_process_changes(self):
changes = {}
processes = self._get_processes()
creates, updates, deletes = diff(self._persist_processes, processes)
if creates:
changes["add-processes"] = list(itervalues(creates))
if updates:
changes["update-processes"] = list(itervalues(updates))
if deletes:
changes["kill-processes"] = list(deletes)
# Update cached values for use on the next run.
self._previous_processes = processes
return changes
