better format of time delta (using seconds2str); increase stability for systemd test-cases

fail2ban/server/filter.py

@@ -664,13 +664,12 @@ class Filter(JailThread):
 				# if weird date - we'd simulate now for timeing issue (too large deviation from now):
 				delta = int(date - MyTime.time())
 				if abs(delta) > 60:
-					delta //= 60
 					# log timing issue as warning once per day:
 					self._logWarnOnce("_next_simByTimeWarn",
-						("Detected a log entry %sm %s the current time in operation mode. "
+						("Detected a log entry %s %s the current time in operation mode. "
 						 "This looks like a %s problem. Treating such entries as if they just happened.",
-						 abs(delta), "before" if delta < 0 else "after",
-						 "latency" if -55 <= delta < 0 else "timezone"
+						 MyTime.seconds2str(abs(delta)), "before" if delta < 0 else "after",
+						 "latency" if -3300 <= delta < 0 else "timezone"
 						 ),
 						("Please check a jail for a timing issue. Line with odd timestamp: %s",
 						 line))

fail2ban/server/mytime.py

@@ -161,3 +161,51 @@ class MyTime:
 			val = rexp.sub(rpl, val)
 		val = MyTime._str2sec_fini.sub(r"\1+\2", val)
 		return eval(val)
+
+	class seconds2str():
+		"""Converts seconds to string on demand (if string representation needed).
+		Ex: seconds2str(86400*390)            = 1y 3w 4d
+		    seconds2str(86400*368)            = 1y 3d
+		    seconds2str(86400*365.5)          = 1y
+		    seconds2str(86400*2+3600*7+60*15) = 2d 7h 15m
+		    seconds2str(86400*2+3599)         = 2d 1h
+		    seconds2str(3600-5)               = 1h
+		    seconds2str(3600-10)              = 59m 50s
+		    seconds2str(59)                   = 59s
+		"""
+		def __init__(self, sec):
+			self.sec = sec
+		def __str__(self):
+			# s = str(datetime.timedelta(seconds=int(self.sec)))
+			# return s if s[-3:] != ":00" else s[:-3]
+			s = self.sec; r = ""; c = 3
+			# automatic accuracy: round by large values (upto 1 minute, or 1 day by year):
+			if s >= 3570:
+				if s >= 31536000:
+					s = int(round(float(s)/86400)*86400)
+				elif s >= 86400:
+					s = int(round(float(s)/60)*60)
+				else:
+					s = int(round(float(s)/10)*10)
+			for n, m in (
+				('y', 31536000), # a year as 365*24*60*60 (don't need to consider leap year by this accuracy)
+				('w',   604800), # a week as 24*60*60*7
+				('d',    86400), # a day as 24*60*60
+				('h',     3600), # a hour as 60*60
+				('m',       60), # a minute
+				('s',        1)  # a second
+			):
+				if s >= m:
+					c -= 1
+					r += ' ' + str(s//m) + n
+					s %= m
+					# stop if no remaining part or no repeat needed (too small granularity):
+					if not s or not c: break
+				elif c < 3:
+					# avoid too small granularity:
+					c -= 1
+					if not c: break
+			#
+			return r[1:]
+		def __repr__(self):
+			return self.__str__()

fail2ban/tests/filtertestcase.py

@@ -457,7 +457,7 @@ class IgnoreIP(LogCaptureTestCase):
 			for i in (1,2,3):
 				self.filter.processLineAndAdd('2019-10-27 02:00:00 fail from 192.0.2.15'); # +3 = 3
 			self.assertLogged(
-				"Detected a log entry 60m before the current time in operation mode. This looks like a timezone problem.",
+				"Detected a log entry 1h before the current time in operation mode. This looks like a timezone problem.",
 				"Please check a jail for a timing issue.",
 				"192.0.2.15:1", "192.0.2.15:2", "192.0.2.15:3",
 				"Total # of detected failures: 3.", all=True, wait=True)
@@ -467,7 +467,7 @@ class IgnoreIP(LogCaptureTestCase):
 			for i in (1,2,3):
 				self.filter.processLineAndAdd('2019-10-27 04:00:00 GMT fail from 192.0.2.16'); # +3 = 6
 			self.assertLogged(
-				"Detected a log entry 120m after the current time in operation mode. This looks like a timezone problem.",
+				"Detected a log entry 2h after the current time in operation mode. This looks like a timezone problem.",
 				"Please check a jail for a timing issue.",
 				"192.0.2.16:1", "192.0.2.16:2", "192.0.2.16:3",
 				"Total # of detected failures: 6.", all=True, wait=True)
@@ -1540,6 +1540,7 @@ def get_monitor_failures_journal_testcase(Filter_): # pragma: systemd no cover
 		def test_delJournalMatch(self):
 			self._initFilter()
 			self.filter.start()
+			self.waitForTicks(1); # wait for start
 			# Smoke test for removing of match
 
 			# basic full test
@@ -1572,6 +1573,7 @@ def get_monitor_failures_journal_testcase(Filter_): # pragma: systemd no cover
 		def test_WrongChar(self):
 			self._initFilter()
 			self.filter.start()
+			self.waitForTicks(1); # wait for start
 			# Now let's feed it with entries from the file
 			_copy_lines_to_journal(
 				self.test_file, self.journal_fields, skip=15, n=4)

fail2ban/tests/misctestcase.py

@@ -457,3 +457,15 @@ class MyTimeTest(unittest.TestCase):
 		self.assertEqual(float(str2sec("1 month")) / 60 / 60 / 24, 30.4375)
 		self.assertEqual(float(str2sec("1 year")) / 60 / 60 / 24, 365.25)
 
+	def testSec2Str(self):
+		sec2str = lambda s: str(MyTime.seconds2str(s))
+		self.assertEqual(sec2str(86400*390),            '1y 3w 4d')
+		self.assertEqual(sec2str(86400*368),            '1y 3d')
+		self.assertEqual(sec2str(86400*365.49),         '1y')
+		self.assertEqual(sec2str(86400*15),             '2w 1d')
+		self.assertEqual(sec2str(86400*14-10),          '2w')
+		self.assertEqual(sec2str(86400*2+3600*7+60*15), '2d 7h 15m')
+		self.assertEqual(sec2str(86400*2+3599),         '2d 1h')
+		self.assertEqual(sec2str(3600-5),               '1h')
+		self.assertEqual(sec2str(3600-10),              '59m 50s')
+		self.assertEqual(sec2str(59),                   '59s')