fixes a small blemish by output in beautifier;

command "unban" returns a count of tickets that were flushed

fail2ban/client/beautifier.py

@@ -89,6 +89,8 @@ class Beautifier:
 						val = " ".join(map(str, res1[1])) if isinstance(res1[1], list) else res1[1]
 						msg.append("%s %s:\t%s" % (prefix1, res1[0], val))
 				msg = "\n".join(msg)
+			elif len(inC) < 2:
+				pass # to few cmd args for below
 			elif inC[1] == "syslogsocket":
 				msg = "Current syslog socket is:\n"
 				msg += "`- " + response
@@ -110,6 +112,8 @@ class Beautifier:
 				else:
 					msg = "Current database purge age is:\n"
 					msg += "`- %iseconds" % response
+			elif len(inC) < 3:
+				pass # to few cmd args for below
 			elif inC[2] in ("logpath", "addlogpath", "dellogpath"):
 				if len(response) == 0:
 					msg = "No file is currently monitored"
@@ -178,7 +182,8 @@ class Beautifier:
 					msg += ", ".join(response)
 		except Exception:
 			logSys.warning("Beautifier error. Please report the error")
-			logSys.error("Beautify %r with %r failed", response, self.__inputCmd)
+			logSys.error("Beautify %r with %r failed", response, self.__inputCmd,
+				exc_info=logSys.getEffectiveLevel()<=logging.DEBUG)
 			msg = repr(msg) + repr(response)
 		return msg
 

fail2ban/server/transmitter.py

@@ -108,11 +108,11 @@ class Transmitter:
 			value = command[1:]
 			# if all ips:
 			if len(value) == 1 and value[0] == "--all":
-				self.__server.setUnbanIP()
-				return
+				return self.__server.setUnbanIP()
+			cnt = 0
 			for value in value:
-				self.__server.setUnbanIP(None, value)
-			return None
+				cnt += self.__server.setUnbanIP(None, value)
+			return cnt
 		elif command[0] == "echo":
 			return command[1:]
 		elif command[0] == "sleep":

fail2ban/tests/fail2banclienttestcase.py

@@ -1075,6 +1075,14 @@ class Fail2banServerTest(Fail2banClientServerBase):
 			"[test-jail1] Ban 192.0.2.4", all=True
 		)
 
+		# unban all (just to test command, already empty - nothing to unban):
+		self.pruneLog("[test-phase 7b]")
+		self.execSuccess(startparams,
+			"--async", "unban", "--all")
+		self.assertLogged(
+			"Flush ban list",
+			"Unbanned 0, 0 ticket(s) in 'test-jail1'", all=True)
+
 		# backend-switch (restart instead of reload):
 		self.pruneLog("[test-phase 8a]")
 		_write_jail_cfg(enabled=[1], backend="xxx-unknown-backend-zzz")