refactoring

28 files changed, 174 insertions, 174 deletions

diff --git a/kvmd/plugins/atx/gpio.py b/kvmd/plugins/atx/gpio.py
index 6df57bb3..538aafaf 100644
--- a/kvmd/plugins/atx/gpio.py
+++ b/kvmd/plugins/atx/gpio.py
@@ -76,7 +76,7 @@ class Plugin(BaseAtx):  # pylint: disable=too-many-instance-attributes
         self.__notifier = aiotools.AioNotifier()
         self.__region = aiotools.AioExclusiveRegion(AtxIsBusyError, self.__notifier)
 
-        self.__line_request: (gpiod.LineRequest | None) = None
+        self.__line_req: (gpiod.LineRequest | None) = None
 
         self.__reader = aiogp.AioReader(
             path=self.__device_path,
@@ -108,8 +108,8 @@ class Plugin(BaseAtx):  # pylint: disable=too-many-instance-attributes
         }
 
     def sysprep(self) -> None:
-        assert self.__line_request is None
-        self.__line_request = gpiod.request_lines(
+        assert self.__line_req is None
+        self.__line_req = gpiod.request_lines(
             self.__device_path,
             consumer="kvmd::atx",
             config={
@@ -143,9 +143,9 @@ class Plugin(BaseAtx):  # pylint: disable=too-many-instance-attributes
         await self.__reader.poll()
 
     async def cleanup(self) -> None:
-        if self.__line_request:
+        if self.__line_req:
             try:
-                self.__line_request.release()
+                self.__line_req.release()
             except Exception:
                 pass
 
@@ -196,11 +196,11 @@ class Plugin(BaseAtx):  # pylint: disable=too-many-instance-attributes
 
     @aiotools.atomic_fg
     async def __inner_click(self, name: str, pin: int, delay: float) -> None:
-        assert self.__line_request
+        assert self.__line_req
         try:
-            self.__line_request.set_value(pin, gpiod.line.Value(True))
+            self.__line_req.set_value(pin, gpiod.line.Value(True))
             await asyncio.sleep(delay)
         finally:
-            self.__line_request.set_value(pin, gpiod.line.Value(False))
+            self.__line_req.set_value(pin, gpiod.line.Value(False))
             await asyncio.sleep(1)
         get_logger(0).info("Clicked ATX button %r", name)
diff --git a/kvmd/plugins/auth/http.py b/kvmd/plugins/auth/http.py
index 520f64dc..b59218aa 100644
--- a/kvmd/plugins/auth/http.py
+++ b/kvmd/plugins/auth/http.py
@@ -85,8 +85,8 @@ class Plugin(BaseAuthService):
                     "User-Agent": htclient.make_user_agent("KVMD"),
                     "X-KVMD-User": user,
                 },
-            ) as response:
-                htclient.raise_not_200(response)
+            ) as resp:
+                htclient.raise_not_200(resp)
                 return True
         except Exception:
             get_logger().exception("Failed HTTP auth request for user %r", user)
diff --git a/kvmd/plugins/auth/ldap.py b/kvmd/plugins/auth/ldap.py
index fa6b9fff..961a47c7 100644
--- a/kvmd/plugins/auth/ldap.py
+++ b/kvmd/plugins/auth/ldap.py
@@ -100,10 +100,10 @@ class Plugin(BaseAuthService):
                     return True
         except ldap.INVALID_CREDENTIALS:
             pass
-        except ldap.SERVER_DOWN as err:
-            get_logger().error("LDAP server is down: %s", tools.efmt(err))
-        except Exception as err:
-            get_logger().error("Unexpected LDAP error: %s", tools.efmt(err))
+        except ldap.SERVER_DOWN as ex:
+            get_logger().error("LDAP server is down: %s", tools.efmt(ex))
+        except Exception as ex:
+            get_logger().error("Unexpected LDAP error: %s", tools.efmt(ex))
         finally:
             if conn is not None:
                 try:
diff --git a/kvmd/plugins/auth/radius.py b/kvmd/plugins/auth/radius.py
index 92c4632d..f048a2e6 100644
--- a/kvmd/plugins/auth/radius.py
+++ b/kvmd/plugins/auth/radius.py
@@ -435,10 +435,10 @@ class Plugin(BaseAuthService):
                 timeout=self.__timeout,
                 dict=dct,
             )
-            request = client.CreateAuthPacket(code=pyrad.packet.AccessRequest, User_Name=user)
-            request["User-Password"] = request.PwCrypt(passwd)
-            response = client.SendPacket(request)
-            return (response.code == pyrad.packet.AccessAccept)
+            req = client.CreateAuthPacket(code=pyrad.packet.AccessRequest, User_Name=user)
+            req["User-Password"] = req.PwCrypt(passwd)
+            resp = client.SendPacket(req)
+            return (resp.code == pyrad.packet.AccessAccept)
         except Exception:
             get_logger().exception("Failed RADIUS auth request for user %r", user)
             return False
diff --git a/kvmd/plugins/hid/_mcu/__init__.py b/kvmd/plugins/hid/_mcu/__init__.py
index 01411621..53665fb2 100644
--- a/kvmd/plugins/hid/_mcu/__init__.py
+++ b/kvmd/plugins/hid/_mcu/__init__.py
@@ -91,7 +91,7 @@ class _TempRequestError(_RequestError):
 
 # =====
 class BasePhyConnection:
-    def send(self, request: bytes) -> bytes:
+    def send(self, req: bytes) -> bytes:
         raise NotImplementedError
 
 
@@ -374,7 +374,7 @@ class BaseMcuHid(BaseHid, multiprocessing.Process):  # pylint: disable=too-many-
         self.__set_state_online(False)
         return False
 
-    def __process_request(self, conn: BasePhyConnection, request: bytes) -> bool:  # pylint: disable=too-many-branches
+    def __process_request(self, conn: BasePhyConnection, req: bytes) -> bool:  # pylint: disable=too-many-branches
         logger = get_logger()
         error_messages: list[str] = []
         live_log_errors = False
@@ -384,47 +384,47 @@ class BaseMcuHid(BaseHid, multiprocessing.Process):  # pylint: disable=too-many-
         error_retval = False
 
         while self.__gpio.is_powered() and common_retries and read_retries:
-            response = (RESPONSE_LEGACY_OK if self.__noop else conn.send(request))
+            resp = (RESPONSE_LEGACY_OK if self.__noop else conn.send(req))
             try:
-                if len(response) < 4:
+                if len(resp) < 4:
                     read_retries -= 1
-                    raise _TempRequestError(f"No response from HID: request={request!r}")
+                    raise _TempRequestError(f"No response from HID: request={req!r}")
 
-                if not check_response(response):
-                    request = REQUEST_REPEAT
+                if not check_response(resp):
+                    req = REQUEST_REPEAT
                     raise _TempRequestError("Invalid response CRC; requesting response again ...")
 
-                code = response[1]
+                code = resp[1]
                 if code == 0x48:  # Request timeout  # pylint: disable=no-else-raise
-                    raise _TempRequestError(f"Got request timeout from HID: request={request!r}")
+                    raise _TempRequestError(f"Got request timeout from HID: request={req!r}")
                 elif code == 0x40:  # CRC Error
-                    raise _TempRequestError(f"Got CRC error of request from HID: request={request!r}")
+                    raise _TempRequestError(f"Got CRC error of request from HID: request={req!r}")
                 elif code == 0x45:  # Unknown command
-                    raise _PermRequestError(f"HID did not recognize the request={request!r}")
+                    raise _PermRequestError(f"HID did not recognize the request={req!r}")
                 elif code == 0x24:  # Rebooted?
                     raise _PermRequestError("No previous command state inside HID, seems it was rebooted")
                 elif code == 0x20:  # Legacy done
                     self.__set_state_online(True)
                     return True
                 elif code & 0x80:  # Pong/Done with state
-                    self.__set_state_pong(response)
+                    self.__set_state_pong(resp)
                     return True
-                raise _TempRequestError(f"Invalid response from HID: request={request!r}, response=0x{response!r}")
+                raise _TempRequestError(f"Invalid response from HID: request={req!r}, response=0x{resp!r}")
 
-            except _RequestError as err:
+            except _RequestError as ex:
                 common_retries -= 1
 
                 if live_log_errors:
-                    logger.error(err.msg)
+                    logger.error(ex.msg)
                 else:
-                    error_messages.append(err.msg)
+                    error_messages.append(ex.msg)
                     if len(error_messages) > self.__errors_threshold:
                         for msg in error_messages:
                             logger.error(msg)
                         error_messages = []
                         live_log_errors = True
 
-                if isinstance(err, _PermRequestError):
+                if isinstance(ex, _PermRequestError):
                     error_retval = True
                     break
 
@@ -440,7 +440,7 @@ class BaseMcuHid(BaseHid, multiprocessing.Process):  # pylint: disable=too-many-
         for msg in error_messages:
             logger.error(msg)
         if not (common_retries and read_retries):
-            logger.error("Can't process HID request due many errors: %r", request)
+            logger.error("Can't process HID request due many errors: %r", req)
         return error_retval
 
     def __set_state_online(self, online: bool) -> None:
@@ -449,11 +449,11 @@ class BaseMcuHid(BaseHid, multiprocessing.Process):  # pylint: disable=too-many-
     def __set_state_busy(self, busy: bool) -> None:
         self.__state_flags.update(busy=int(busy))
 
-    def __set_state_pong(self, response: bytes) -> None:
-        status = response[1] << 16
-        if len(response) > 4:
-            status |= (response[2] << 8) | response[3]
-        reset_required = (1 if response[1] & 0b01000000 else 0)
+    def __set_state_pong(self, resp: bytes) -> None:
+        status = resp[1] << 16
+        if len(resp) > 4:
+            status |= (resp[2] << 8) | resp[3]
+        reset_required = (1 if resp[1] & 0b01000000 else 0)
         self.__state_flags.update(online=1, busy=reset_required, status=status)
         if reset_required:
             if self.__reset_self:
diff --git a/kvmd/plugins/hid/_mcu/gpio.py b/kvmd/plugins/hid/_mcu/gpio.py
index 0afbcc69..ce1d678b 100644
--- a/kvmd/plugins/hid/_mcu/gpio.py
+++ b/kvmd/plugins/hid/_mcu/gpio.py
@@ -47,12 +47,12 @@ class Gpio:  # pylint: disable=too-many-instance-attributes
         self.__reset_inverted = reset_inverted
         self.__reset_delay = reset_delay
 
-        self.__line_request: (gpiod.LineRequest | None) = None
+        self.__line_req: (gpiod.LineRequest | None) = None
         self.__last_power: (bool | None) = None
 
     def __enter__(self) -> None:
         if self.__power_detect_pin >= 0 or self.__reset_pin >= 0:
-            assert self.__line_request is None
+            assert self.__line_req is None
             config: dict[int, gpiod.LineSettings] = {}
             if self.__power_detect_pin >= 0:
                 config[self.__power_detect_pin] = gpiod.LineSettings(
@@ -65,7 +65,7 @@ class Gpio:  # pylint: disable=too-many-instance-attributes
                     output_value=gpiod.line.Value(self.__reset_inverted),
                 )
             assert len(config) > 0
-            self.__line_request = gpiod.request_lines(
+            self.__line_req = gpiod.request_lines(
                 self.__device_path,
                 consumer="kvmd::hid",
                 config=config,
@@ -78,18 +78,18 @@ class Gpio:  # pylint: disable=too-many-instance-attributes
         _tb: types.TracebackType,
     ) -> None:
 
-        if self.__line_request:
+        if self.__line_req:
             try:
-                self.__line_request.release()
+                self.__line_req.release()
             except Exception:
                 pass
             self.__last_power = None
-            self.__line_request = None
+            self.__line_req = None
 
     def is_powered(self) -> bool:
         if self.__power_detect_pin >= 0:
-            assert self.__line_request
-            power = bool(self.__line_request.get_value(self.__power_detect_pin).value)
+            assert self.__line_req
+            power = bool(self.__line_req.get_value(self.__power_detect_pin).value)
             if power != self.__last_power:
                 get_logger(0).info("HID power state changed: %s -> %s", self.__last_power, power)
                 self.__last_power = power
@@ -98,11 +98,11 @@ class Gpio:  # pylint: disable=too-many-instance-attributes
 
     def reset(self) -> None:
         if self.__reset_pin >= 0:
-            assert self.__line_request
+            assert self.__line_req
             try:
-                self.__line_request.set_value(self.__reset_pin, gpiod.line.Value(not self.__reset_inverted))
+                self.__line_req.set_value(self.__reset_pin, gpiod.line.Value(not self.__reset_inverted))
                 time.sleep(self.__reset_delay)
             finally:
-                self.__line_request.set_value(self.__reset_pin, gpiod.line.Value(self.__reset_inverted))
+                self.__line_req.set_value(self.__reset_pin, gpiod.line.Value(self.__reset_inverted))
                 time.sleep(1)
             get_logger(0).info("Reset HID performed")
diff --git a/kvmd/plugins/hid/_mcu/proto.py b/kvmd/plugins/hid/_mcu/proto.py
index 76cd5d09..deaf5c15 100644
--- a/kvmd/plugins/hid/_mcu/proto.py
+++ b/kvmd/plugins/hid/_mcu/proto.py
@@ -184,17 +184,17 @@ class MouseWheelEvent(BaseEvent):
 
 
 # =====
-def check_response(response: bytes) -> bool:
-    assert len(response) in (4, 8), response
-    return (bitbang.make_crc16(response[:-2]) == struct.unpack(">H", response[-2:])[0])
+def check_response(resp: bytes) -> bool:
+    assert len(resp) in (4, 8), resp
+    return (bitbang.make_crc16(resp[:-2]) == struct.unpack(">H", resp[-2:])[0])
 
 
-def _make_request(command: bytes) -> bytes:
-    assert len(command) == 5, command
-    request = b"\x33" + command
-    request += struct.pack(">H", bitbang.make_crc16(request))
-    assert len(request) == 8, request
-    return request
+def _make_request(cmd: bytes) -> bytes:
+    assert len(cmd) == 5, cmd
+    req = b"\x33" + cmd
+    req += struct.pack(">H", bitbang.make_crc16(req))
+    assert len(req) == 8, req
+    return req
 
 
 # =====
diff --git a/kvmd/plugins/hid/bt/server.py b/kvmd/plugins/hid/bt/server.py
index 2b6a4307..ad2b6982 100644
--- a/kvmd/plugins/hid/bt/server.py
+++ b/kvmd/plugins/hid/bt/server.py
@@ -182,8 +182,8 @@ class BtServer:  # pylint: disable=too-many-instance-attributes
                             self.__close_client("CTL", client, "ctl_sock")
                         elif data == b"\x71":
                             sock.send(b"\x00")
-                    except Exception as err:
-                        get_logger(0).exception("CTL socket error on %s: %s", client.addr, tools.efmt(err))
+                    except Exception as ex:
+                        get_logger(0).exception("CTL socket error on %s: %s", client.addr, tools.efmt(ex))
                         self.__close_client("CTL", client, "ctl_sock")
                         continue
 
@@ -196,8 +196,8 @@ class BtServer:  # pylint: disable=too-many-instance-attributes
                             self.__close_client("INT", client, "int_sock")
                         elif data[:2] == b"\xA2\x01":
                             self.__process_leds(data[2])
-                    except Exception as err:
-                        get_logger(0).exception("INT socket error on %s: %s", client.addr, tools.efmt(err))
+                    except Exception as ex:
+                        get_logger(0).exception("INT socket error on %s: %s", client.addr, tools.efmt(ex))
                         self.__close_client("INT", client, "ctl_sock")
 
             if qr in ready_read:
@@ -279,8 +279,8 @@ class BtServer:  # pylint: disable=too-many-instance-attributes
         assert client.int_sock is not None
         try:
             client.int_sock.send(report)
-        except Exception as err:
-            get_logger(0).info("Can't send %s report to %s: %s", name, client.addr, tools.efmt(err))
+        except Exception as ex:
+            get_logger(0).info("Can't send %s report to %s: %s", name, client.addr, tools.efmt(ex))
             self.__close_client_pair(client)
 
     def __clear_modifiers(self) -> None:
@@ -371,13 +371,13 @@ class BtServer:  # pylint: disable=too-many-instance-attributes
             logger.info("Publishing ..." if public else "Unpublishing ...")
             try:
                 self.__iface.set_public(public)
-            except Exception as err:
-                logger.error("Can't change public mode: %s", tools.efmt(err))
+            except Exception as ex:
+                logger.error("Can't change public mode: %s", tools.efmt(ex))
 
     def __unpair_client(self, client: _BtClient) -> None:
         logger = get_logger(0)
         logger.info("Unpairing %s ...", client.addr)
         try:
             self.__iface.unpair(client.addr)
-        except Exception as err:
-            logger.error("Can't unpair %s: %s", client.addr, tools.efmt(err))
+        except Exception as ex:
+            logger.error("Can't unpair %s: %s", client.addr, tools.efmt(ex))
diff --git a/kvmd/plugins/hid/ch9329/__init__.py b/kvmd/plugins/hid/ch9329/__init__.py
index 4e2be8c9..3245505d 100644
--- a/kvmd/plugins/hid/ch9329/__init__.py
+++ b/kvmd/plugins/hid/ch9329/__init__.py
@@ -230,9 +230,9 @@ class Plugin(BaseHid, multiprocessing.Process):  # pylint: disable=too-many-inst
     def __process_cmd(self, conn: ChipConnection, cmd: bytes) -> bool:  # pylint: disable=too-many-branches
         try:
             led_byte = conn.xfer(cmd)
-        except ChipResponseError as err:
+        except ChipResponseError as ex:
             self.__set_state_online(False)
-            get_logger(0).info(err)
+            get_logger(0).error("Invalid chip response: %s", tools.efmt(ex))
             time.sleep(2)
         else:
             if led_byte >= 0:
diff --git a/kvmd/plugins/hid/otg/device.py b/kvmd/plugins/hid/otg/device.py
index dfab658d..a3bc2739 100644
--- a/kvmd/plugins/hid/otg/device.py
+++ b/kvmd/plugins/hid/otg/device.py
@@ -192,13 +192,13 @@ class BaseDeviceProcess(multiprocessing.Process):  # pylint: disable=too-many-in
             else:
                 logger.error("HID-%s write() error: written (%s) != report length (%d)",
                              self.__name, written, len(report))
-        except Exception as err:
-            if isinstance(err, OSError) and (
+        except Exception as ex:
+            if isinstance(ex, OSError) and (
                 # https://github.com/raspberrypi/linux/commit/61b7f805dc2fd364e0df682de89227e94ce88e25
-                err.errno == errno.EAGAIN  # pylint: disable=no-member
-                or err.errno == errno.ESHUTDOWN  # pylint: disable=no-member
+                ex.errno == errno.EAGAIN  # pylint: disable=no-member
+                or ex.errno == errno.ESHUTDOWN  # pylint: disable=no-member
             ):
-                logger.debug("HID-%s busy/unplugged (write): %s", self.__name, tools.efmt(err))
+                logger.debug("HID-%s busy/unplugged (write): %s", self.__name, tools.efmt(ex))
             else:
                 logger.exception("Can't write report to HID-%s", self.__name)
 
@@ -216,16 +216,16 @@ class BaseDeviceProcess(multiprocessing.Process):  # pylint: disable=too-many-in
         while read:
             try:
                 read = bool(select.select([self.__fd], [], [], 0)[0])
-            except Exception as err:
-                logger.error("Can't select() for read HID-%s: %s", self.__name, tools.efmt(err))
+            except Exception as ex:
+                logger.error("Can't select() for read HID-%s: %s", self.__name, tools.efmt(ex))
                 break
 
             if read:
                 try:
                     report = os.read(self.__fd, self.__read_size)
-                except Exception as err:
-                    if isinstance(err, OSError) and err.errno == errno.EAGAIN:  # pylint: disable=no-member
-                        logger.debug("HID-%s busy/unplugged (read): %s", self.__name, tools.efmt(err))
+                except Exception as ex:
+                    if isinstance(ex, OSError) and ex.errno == errno.EAGAIN:  # pylint: disable=no-member
+                        logger.debug("HID-%s busy/unplugged (read): %s", self.__name, tools.efmt(ex))
                     else:
                         logger.exception("Can't read report from HID-%s", self.__name)
                 else:
@@ -255,9 +255,9 @@ class BaseDeviceProcess(multiprocessing.Process):  # pylint: disable=too-many-in
                     flags = os.O_NONBLOCK
                     flags |= (os.O_RDWR if self.__read_size else os.O_WRONLY)
                     self.__fd = os.open(self.__device_path, flags)
-                except Exception as err:
+                except Exception as ex:
                     logger.error("Can't open HID-%s device %s: %s",
-                                 self.__name, self.__device_path, tools.efmt(err))
+                                 self.__name, self.__device_path, tools.efmt(ex))
 
         if self.__fd >= 0:
             try:
@@ -268,8 +268,8 @@ class BaseDeviceProcess(multiprocessing.Process):  # pylint: disable=too-many-in
                 else:
                     # Если запись недоступна, то скорее всего устройство отключено
                     logger.debug("HID-%s is busy/unplugged (write select)", self.__name)
-            except Exception as err:
-                logger.error("Can't select() for write HID-%s: %s", self.__name, tools.efmt(err))
+            except Exception as ex:
+                logger.error("Can't select() for write HID-%s: %s", self.__name, tools.efmt(ex))
 
         self.__state_flags.update(online=False)
         return False
diff --git a/kvmd/plugins/hid/serial.py b/kvmd/plugins/hid/serial.py
index 4b8e6165..040828b4 100644
--- a/kvmd/plugins/hid/serial.py
+++ b/kvmd/plugins/hid/serial.py
@@ -44,12 +44,12 @@ class _SerialPhyConnection(BasePhyConnection):
     def __init__(self, tty: serial.Serial) -> None:
         self.__tty = tty
 
-    def send(self, request: bytes) -> bytes:
-        assert len(request) == 8
-        assert request[0] == 0x33
+    def send(self, req: bytes) -> bytes:
+        assert len(req) == 8
+        assert req[0] == 0x33
         if self.__tty.in_waiting:
             self.__tty.read_all()
-        assert self.__tty.write(request) == 8
+        assert self.__tty.write(req) == 8
         data = self.__tty.read(4)
         if len(data) == 4:
             if data[0] == 0x34:  # New response protocol
diff --git a/kvmd/plugins/hid/spi.py b/kvmd/plugins/hid/spi.py
index dadcc77e..cf58b5de 100644
--- a/kvmd/plugins/hid/spi.py
+++ b/kvmd/plugins/hid/spi.py
@@ -57,9 +57,9 @@ class _SpiPhyConnection(BasePhyConnection):
         self.__xfer = xfer
         self.__read_timeout = read_timeout
 
-    def send(self, request: bytes) -> bytes:
-        assert len(request) == 8
-        assert request[0] == 0x33
+    def send(self, req: bytes) -> bytes:
+        assert len(req) == 8
+        assert req[0] == 0x33
 
         deadline_ts = time.monotonic() + self.__read_timeout
         dummy = b"\x00" * 10
@@ -70,26 +70,26 @@ class _SpiPhyConnection(BasePhyConnection):
             get_logger(0).error("SPI timeout reached while garbage reading")
             return b""
 
-        self.__xfer(request)
+        self.__xfer(req)
 
-        response: list[int] = []
+        resp: list[int] = []
         deadline_ts = time.monotonic() + self.__read_timeout
         found = False
         while time.monotonic() < deadline_ts:
-            for byte in self.__xfer(b"\x00" * (9 - len(response))):
+            for byte in self.__xfer(b"\x00" * (9 - len(resp))):
                 if not found:
                     if byte == 0:
                         continue
                     found = True
-                response.append(byte)
-                if len(response) == 8:
+                resp.append(byte)
+                if len(resp) == 8:
                     break
-            if len(response) == 8:
+            if len(resp) == 8:
                 break
         else:
             get_logger(0).error("SPI timeout reached while responce waiting")
             return b""
-        return bytes(response)
+        return bytes(resp)
 
 
 class _SpiPhy(BasePhy):  # pylint: disable=too-many-instance-attributes
diff --git a/kvmd/plugins/msd/otg/drive.py b/kvmd/plugins/msd/otg/drive.py
index 1bae91e5..825354a5 100644
--- a/kvmd/plugins/msd/otg/drive.py
+++ b/kvmd/plugins/msd/otg/drive.py
@@ -82,7 +82,7 @@ class Drive:
         try:
             with open(os.path.join(self.__lun_path, param), "w") as file:
                 file.write(value + "\n")
-        except OSError as err:
-            if err.errno == errno.EBUSY:
+        except OSError as ex:
+            if ex.errno == errno.EBUSY:
                 raise MsdDriveLockedError()
             raise
diff --git a/kvmd/plugins/ugpio/anelpwr.py b/kvmd/plugins/ugpio/anelpwr.py
index a9cc432b..af83f0a2 100644
--- a/kvmd/plugins/ugpio/anelpwr.py
+++ b/kvmd/plugins/ugpio/anelpwr.py
@@ -113,13 +113,13 @@ class Plugin(BaseUserGpioDriver):  # pylint: disable=too-many-instance-attribute
         while True:
             session = self.__ensure_http_session()
             try:
-                async with session.get(f"{self.__url}/strg.cfg") as response:
-                    htclient.raise_not_200(response)
-                    parts = (await response.text()).split(";")
+                async with session.get(f"{self.__url}/strg.cfg") as resp:
+                    htclient.raise_not_200(resp)
+                    parts = (await resp.text()).split(";")
                     for pin in self.__state:
                         self.__state[pin] = (parts[1 + int(pin) * 5] == "1")
-            except Exception as err:
-                get_logger().error("Failed ANELPWR bulk GET request: %s", tools.efmt(err))
+            except Exception as ex:
+                get_logger().error("Failed ANELPWR bulk GET request: %s", tools.efmt(ex))
                 self.__state = dict.fromkeys(self.__state, None)
             if self.__state != prev_state:
                 self._notifier.notify()
@@ -143,10 +143,10 @@ class Plugin(BaseUserGpioDriver):  # pylint: disable=too-many-instance-attribute
                 url=f"{self.__url}/ctrl.htm",
                 data=f"F{pin}={int(state)}",
                 headers={"Content-Type": "text/plain"},
-            ) as response:
-                htclient.raise_not_200(response)
-        except Exception as err:
-            get_logger().error("Failed ANELPWR POST request to pin %s: %s", pin, tools.efmt(err))
+            ) as resp:
+                htclient.raise_not_200(resp)
+        except Exception as ex:
+            get_logger().error("Failed ANELPWR POST request to pin %s: %s", pin, tools.efmt(ex))
             raise GpioDriverOfflineError(self)
         self.__update_notifier.notify()
 
diff --git a/kvmd/plugins/ugpio/cmd.py b/kvmd/plugins/ugpio/cmd.py
index c3392b68..b8581ce3 100644
--- a/kvmd/plugins/ugpio/cmd.py
+++ b/kvmd/plugins/ugpio/cmd.py
@@ -78,9 +78,9 @@ class Plugin(BaseUserGpioDriver):  # pylint: disable=too-many-instance-attribute
             proc = await aioproc.log_process(self.__cmd, logger=get_logger(0), prefix=str(self))
             if proc.returncode != 0:
                 raise RuntimeError(f"Custom command error: retcode={proc.returncode}")
-        except Exception as err:
+        except Exception as ex:
             get_logger(0).error("Can't run custom command [ %s ]: %s",
-                                tools.cmdfmt(self.__cmd), tools.efmt(err))
+                                tools.cmdfmt(self.__cmd), tools.efmt(ex))
             raise GpioDriverOfflineError(self)
 
     def __str__(self) -> str:
diff --git a/kvmd/plugins/ugpio/cmdret.py b/kvmd/plugins/ugpio/cmdret.py
index 0eea78f6..7080a390 100644
--- a/kvmd/plugins/ugpio/cmdret.py
+++ b/kvmd/plugins/ugpio/cmdret.py
@@ -71,9 +71,9 @@ class Plugin(BaseUserGpioDriver):  # pylint: disable=too-many-instance-attribute
         try:
             proc = await aioproc.log_process(self.__cmd, logger=get_logger(0), prefix=str(self))
             return (proc.returncode == 0)
-        except Exception as err:
+        except Exception as ex:
             get_logger(0).error("Can't run custom command [ %s ]: %s",
-                                tools.cmdfmt(self.__cmd), tools.efmt(err))
+                                tools.cmdfmt(self.__cmd), tools.efmt(ex))
             raise GpioDriverOfflineError(self)
 
     async def write(self, pin: str, state: bool) -> None:
diff --git a/kvmd/plugins/ugpio/extron.py b/kvmd/plugins/ugpio/extron.py
index cb9fe96e..81a66c92 100644
--- a/kvmd/plugins/ugpio/extron.py
+++ b/kvmd/plugins/ugpio/extron.py
@@ -150,9 +150,9 @@ class Plugin(BaseUserGpioDriver):  # pylint: disable=too-many-instance-attribute
                             assert channel is not None
                             self.__send_channel(tty, channel)
 
-            except Exception as err:
+            except Exception as ex:
                 self.__channel_queue.put_nowait(None)
-                if isinstance(err, serial.SerialException) and err.errno == errno.ENOENT:  # pylint: disable=no-member
+                if isinstance(ex, serial.SerialException) and ex.errno == errno.ENOENT:  # pylint: disable=no-member
                     logger.error("Missing %s serial device: %s", self, self.__device_path)
                 else:
                     logger.exception("Unexpected %s error", self)
diff --git a/kvmd/plugins/ugpio/ezcoo.py b/kvmd/plugins/ugpio/ezcoo.py
index c3502a61..d5bd8ef8 100644
--- a/kvmd/plugins/ugpio/ezcoo.py
+++ b/kvmd/plugins/ugpio/ezcoo.py
@@ -150,9 +150,9 @@ class Plugin(BaseUserGpioDriver):  # pylint: disable=too-many-instance-attribute
                             assert channel is not None
                             self.__send_channel(tty, channel)
 
-            except Exception as err:
+            except Exception as ex:
                 self.__channel_queue.put_nowait(None)
-                if isinstance(err, serial.SerialException) and err.errno == errno.ENOENT:  # pylint: disable=no-member
+                if isinstance(ex, serial.SerialException) and ex.errno == errno.ENOENT:  # pylint: disable=no-member
                     logger.error("Missing %s serial device: %s", self, self.__device_path)
                 else:
                     logger.exception("Unexpected %s error", self)
diff --git a/kvmd/plugins/ugpio/gpio.py b/kvmd/plugins/ugpio/gpio.py
index 1ae1fbe0..6cda826b 100644
--- a/kvmd/plugins/ugpio/gpio.py
+++ b/kvmd/plugins/ugpio/gpio.py
@@ -54,7 +54,7 @@ class Plugin(BaseUserGpioDriver):
         self.__output_pins: dict[int, (bool | None)] = {}
 
         self.__reader: (aiogp.AioReader | None) = None
-        self.__outputs_request: (gpiod.LineRequest | None) = None
+        self.__outputs_req: (gpiod.LineRequest | None) = None
 
     @classmethod
     def get_plugin_options(cls) -> dict:
@@ -74,7 +74,7 @@ class Plugin(BaseUserGpioDriver):
 
     def prepare(self) -> None:
         assert self.__reader is None
-        assert self.__outputs_request is None
+        assert self.__outputs_req is None
         self.__reader = aiogp.AioReader(
             path=self.__device_path,
             consumer="kvmd::gpio::inputs",
@@ -82,7 +82,7 @@ class Plugin(BaseUserGpioDriver):
             notifier=self._notifier,
         )
         if self.__output_pins:
-            self.__outputs_request = gpiod.request_lines(
+            self.__outputs_req = gpiod.request_lines(
                 self.__device_path,
                 consumer="kvmd::gpiod::outputs",
                 config={
@@ -99,9 +99,9 @@ class Plugin(BaseUserGpioDriver):
         await self.__reader.poll()
 
     async def cleanup(self) -> None:
-        if self.__outputs_request:
+        if self.__outputs_req:
             try:
-                self.__outputs_request.release()
+                self.__outputs_req.release()
             except Exception:
                 pass
 
@@ -110,15 +110,15 @@ class Plugin(BaseUserGpioDriver):
         pin_int = int(pin)
         if pin_int in self.__input_pins:
             return self.__reader.get(pin_int)
-        assert self.__outputs_request
+        assert self.__outputs_req
         assert pin_int in self.__output_pins
-        return bool(self.__outputs_request.get_value(pin_int).value)
+        return bool(self.__outputs_req.get_value(pin_int).value)
 
     async def write(self, pin: str, state: bool) -> None:
-        assert self.__outputs_request
+        assert self.__outputs_req
         pin_int = int(pin)
         assert pin_int in self.__output_pins
-        self.__outputs_request.set_value(pin_int, gpiod.line.Value(state))
+        self.__outputs_req.set_value(pin_int, gpiod.line.Value(state))
 
     def __str__(self) -> str:
         return f"GPIO({self._instance_name})"
diff --git a/kvmd/plugins/ugpio/hidrelay.py b/kvmd/plugins/ugpio/hidrelay.py
index 894da42c..17f41e27 100644
--- a/kvmd/plugins/ugpio/hidrelay.py
+++ b/kvmd/plugins/ugpio/hidrelay.py
@@ -93,9 +93,9 @@ class Plugin(BaseUserGpioDriver):
         try:
             with self.__ensure_device("probing"):
                 pass
-        except Exception as err:
+        except Exception as ex:
             logger.error("Can't probe %s on %s: %s",
-                         self, self.__device_path, tools.efmt(err))
+                         self, self.__device_path, tools.efmt(ex))
         self.__reset_pins()
 
     async def run(self) -> None:
@@ -137,9 +137,9 @@ class Plugin(BaseUserGpioDriver):
                             pin, state, self, self.__device_path)
                 try:
                     self.__inner_write(pin, state)
-                except Exception as err:
+                except Exception as ex:
                     logger.error("Can't reset pin=%d of %s on %s: %s",
-                                 pin, self, self.__device_path, tools.efmt(err))
+                                 pin, self, self.__device_path, tools.efmt(ex))
 
     def __inner_read(self, pin: int) -> bool:
         assert 0 <= pin <= 7
@@ -168,9 +168,9 @@ class Plugin(BaseUserGpioDriver):
             get_logger(0).info("Opened %s on %s while %s", self, self.__device_path, context)
         try:
             yield self.__device
-        except Exception as err:
+        except Exception as ex:
             get_logger(0).error("Error occured on %s on %s while %s: %s",
-                                self, self.__device_path, context, tools.efmt(err))
+                                self, self.__device_path, context, tools.efmt(ex))
             self.__close_device()
             raise
 
diff --git a/kvmd/plugins/ugpio/hue.py b/kvmd/plugins/ugpio/hue.py
index 2c0e6749..9ed9e206 100644
--- a/kvmd/plugins/ugpio/hue.py
+++ b/kvmd/plugins/ugpio/hue.py
@@ -111,13 +111,13 @@ class Plugin(BaseUserGpioDriver):  # pylint: disable=too-many-instance-attribute
         while True:
             session = self.__ensure_http_session()
             try:
-                async with session.get(f"{self.__url}/api/{self.__token}/lights") as response:
-                    results = await response.json()
+                async with session.get(f"{self.__url}/api/{self.__token}/lights") as resp:
+                    results = await resp.json()
                     for pin in self.__state:
                         if pin in results:
                             self.__state[pin] = bool(results[pin]["state"]["on"])
-            except Exception as err:
-                get_logger().error("Failed Hue bulk GET request: %s", tools.efmt(err))
+            except Exception as ex:
+                get_logger().error("Failed Hue bulk GET request: %s", tools.efmt(ex))
                 self.__state = dict.fromkeys(self.__state, None)
             if self.__state != prev_state:
                 self._notifier.notify()
@@ -140,10 +140,10 @@ class Plugin(BaseUserGpioDriver):  # pylint: disable=too-many-instance-attribute
             async with session.put(
                 url=f"{self.__url}/api/{self.__token}/lights/{pin}/state",
                 json={"on": state},
-            ) as response:
-                htclient.raise_not_200(response)
-        except Exception as err:
-            get_logger().error("Failed Hue PUT request to pin %s: %s", pin, tools.efmt(err))
+            ) as resp:
+                htclient.raise_not_200(resp)
+        except Exception as ex:
+            get_logger().error("Failed Hue PUT request to pin %s: %s", pin, tools.efmt(ex))
             raise GpioDriverOfflineError(self)
         self.__update_notifier.notify()
 
diff --git a/kvmd/plugins/ugpio/ipmi.py b/kvmd/plugins/ugpio/ipmi.py
index 8aec6c3d..37a7a16f 100644
--- a/kvmd/plugins/ugpio/ipmi.py
+++ b/kvmd/plugins/ugpio/ipmi.py
@@ -153,9 +153,9 @@ class Plugin(BaseUserGpioDriver):  # pylint: disable=too-many-instance-attribute
             proc = await aioproc.log_process(**self.__make_ipmitool_kwargs(action), logger=get_logger(0), prefix=str(self))
             if proc.returncode != 0:
                 raise RuntimeError(f"Ipmitool error: retcode={proc.returncode}")
-        except Exception as err:
+        except Exception as ex:
             get_logger(0).error("Can't send IPMI power-%s request to %s:%d: %s",
-                                action, self.__host, self.__port, tools.efmt(err))
+                                action, self.__host, self.__port, tools.efmt(ex))
             raise GpioDriverOfflineError(self)
 
     # =====
@@ -171,9 +171,9 @@ class Plugin(BaseUserGpioDriver):  # pylint: disable=too-many-instance-attribute
                 self.__online = True
                 return
             raise RuntimeError(f"Invalid ipmitool response: {text}")
-        except Exception as err:
+        except Exception as ex:
             get_logger(0).error("Can't fetch IPMI power status from %s:%d: %s",
-                                self.__host, self.__port, tools.efmt(err))
+                                self.__host, self.__port, tools.efmt(ex))
             self.__power = False
             self.__online = False
 
diff --git a/kvmd/plugins/ugpio/locator.py b/kvmd/plugins/ugpio/locator.py
index f42116a7..d5cba719 100644
--- a/kvmd/plugins/ugpio/locator.py
+++ b/kvmd/plugins/ugpio/locator.py
@@ -53,7 +53,7 @@ class Plugin(BaseUserGpioDriver):
         self.__device_path = device_path
 
         self.__tasks: dict[int, (asyncio.Task | None)] = {}
-        self.__line_request: (gpiod.LineRequest | None) = None
+        self.__line_req: (gpiod.LineRequest | None) = None
 
     @classmethod
     def get_plugin_options(cls) -> dict:
@@ -74,7 +74,7 @@ class Plugin(BaseUserGpioDriver):
         self.__tasks[int(pin)] = None
 
     def prepare(self) -> None:
-        self.__line_request = gpiod.request_lines(
+        self.__line_req = gpiod.request_lines(
             self.__device_path,
             consumer="kvmd::locator",
             config={
@@ -94,9 +94,9 @@ class Plugin(BaseUserGpioDriver):
         for task in tasks:
             task.cancel()
         await asyncio.gather(*tasks, return_exceptions=True)
-        if self.__line_request:
+        if self.__line_req:
             try:
-                self.__line_request.release()
+                self.__line_req.release()
             except Exception:
                 pass
 
@@ -115,17 +115,17 @@ class Plugin(BaseUserGpioDriver):
 
     async def __blink(self, pin: int) -> None:
         assert pin in self.__tasks
-        assert self.__line_request
+        assert self.__line_req
         try:
             state = True
             while True:
-                self.__line_request.set_value(pin, gpiod.line.Value(state))
+                self.__line_req.set_value(pin, gpiod.line.Value(state))
                 state = (not state)
                 await asyncio.sleep(0.1)
         except asyncio.CancelledError:
             pass
         finally:
-            self.__line_request.set_value(pin, gpiod.line.Value(False))
+            self.__line_req.set_value(pin, gpiod.line.Value(False))
 
     def __str__(self) -> str:
         return f"Locator({self._instance_name})"
diff --git a/kvmd/plugins/ugpio/noyito.py b/kvmd/plugins/ugpio/noyito.py
index f3c04a57..7363e2d4 100644
--- a/kvmd/plugins/ugpio/noyito.py
+++ b/kvmd/plugins/ugpio/noyito.py
@@ -91,9 +91,9 @@ class Plugin(BaseUserGpioDriver):
         try:
             with self.__ensure_device("probing"):
                 pass
-        except Exception as err:
+        except Exception as ex:
             logger.error("Can't probe %s on %s: %s",
-                         self, self.__device_path, tools.efmt(err))
+                         self, self.__device_path, tools.efmt(ex))
         self.__reset_pins()
 
     async def cleanup(self) -> None:
@@ -119,9 +119,9 @@ class Plugin(BaseUserGpioDriver):
                         pin, state, self, self.__device_path)
             try:
                 self.__inner_write(pin, state)
-            except Exception as err:
+            except Exception as ex:
                 logger.error("Can't reset pin=%d of %s on %s: %s",
-                             pin, self, self.__device_path, tools.efmt(err))
+                             pin, self, self.__device_path, tools.efmt(ex))
 
     def __inner_write(self, pin: int, state: bool) -> None:
         assert 0 <= pin <= 7
@@ -144,9 +144,9 @@ class Plugin(BaseUserGpioDriver):
             get_logger(0).info("Opened %s on %s while %s", self, self.__device_path, context)
         try:
             yield self.__device
-        except Exception as err:
+        except Exception as ex:
             get_logger(0).error("Error occured on %s on %s while %s: %s",
-                                self, self.__device_path, context, tools.efmt(err))
+                                self, self.__device_path, context, tools.efmt(ex))
             self.__close_device()
             raise
 
diff --git a/kvmd/plugins/ugpio/pway.py b/kvmd/plugins/ugpio/pway.py
index 25a1f454..140cf02a 100644
--- a/kvmd/plugins/ugpio/pway.py
+++ b/kvmd/plugins/ugpio/pway.py
@@ -153,9 +153,9 @@ class Plugin(BaseUserGpioDriver):  # pylint: disable=too-many-instance-attribute
                             assert channel is not None
                             self.__send_channel(tty, channel)
 
-            except Exception as err:
+            except Exception as ex:
                 self.__channel_queue.put_nowait(None)
-                if isinstance(err, serial.SerialException) and err.errno == errno.ENOENT:  # pylint: disable=no-member
+                if isinstance(ex, serial.SerialException) and ex.errno == errno.ENOENT:  # pylint: disable=no-member
                     logger.error("Missing %s serial device: %s", self, self.__device_path)
                 else:
                     logger.exception("Unexpected %s error", self)
diff --git a/kvmd/plugins/ugpio/pwm.py b/kvmd/plugins/ugpio/pwm.py
index 8aedb771..f202836e 100644
--- a/kvmd/plugins/ugpio/pwm.py
+++ b/kvmd/plugins/ugpio/pwm.py
@@ -94,18 +94,18 @@ class Plugin(BaseUserGpioDriver):
                 pwm.period_ns = self.__period
                 pwm.duty_cycle_ns = self.__get_duty_cycle(bool(initial))
                 pwm.enable()
-            except Exception as err:
+            except Exception as ex:
                 logger.error("Can't get PWM chip %d channel %d: %s",
-                             self.__chip, pin, tools.efmt(err))
+                             self.__chip, pin, tools.efmt(ex))
 
     async def cleanup(self) -> None:
         for (pin, pwm) in self.__pwms.items():
             try:
                 pwm.disable()
                 pwm.close()
-            except Exception as err:
+            except Exception as ex:
                 get_logger(0).error("Can't cleanup PWM chip %d channel %d: %s",
-                                    self.__chip, pin, tools.efmt(err))
+                                    self.__chip, pin, tools.efmt(ex))
 
     async def read(self, pin: str) -> bool:
         try:
diff --git a/kvmd/plugins/ugpio/tesmart.py b/kvmd/plugins/ugpio/tesmart.py
index 5a5cd441..bb1d39e1 100644
--- a/kvmd/plugins/ugpio/tesmart.py
+++ b/kvmd/plugins/ugpio/tesmart.py
@@ -146,9 +146,9 @@ class Plugin(BaseUserGpioDriver):  # pylint: disable=too-many-instance-attribute
                 asyncio.ensure_future(self.__reader.readexactly(6)),
                 timeout=self.__timeout,
             ))[4]
-        except Exception as err:
+        except Exception as ex:
             get_logger(0).error("Can't send command to TESmart KVM [%s]:%d: %s",
-                                self.__host, self.__port, tools.efmt(err))
+                                self.__host, self.__port, tools.efmt(ex))
             await self.__close_device()
             self.__active = -1
             raise GpioDriverOfflineError(self)
@@ -168,9 +168,9 @@ class Plugin(BaseUserGpioDriver):  # pylint: disable=too-many-instance-attribute
                 asyncio.ensure_future(asyncio.open_connection(self.__host, self.__port)),
                 timeout=self.__timeout,
             )
-        except Exception as err:
+        except Exception as ex:
             get_logger(0).error("Can't connect to TESmart KVM [%s]:%d: %s",
-                                self.__host, self.__port, tools.efmt(err))
+                                self.__host, self.__port, tools.efmt(ex))
             raise GpioDriverOfflineError(self)
 
     async def __ensure_device_serial(self) -> None:
@@ -179,9 +179,9 @@ class Plugin(BaseUserGpioDriver):  # pylint: disable=too-many-instance-attribute
                 serial_asyncio.open_serial_connection(url=self.__device_path, baudrate=self.__speed),
                 timeout=self.__timeout,
             )
-        except Exception as err:
+        except Exception as ex:
             get_logger(0).error("Can't connect to TESmart KVM [%s]:%d: %s",
-                                self.__device_path, self.__speed, tools.efmt(err))
+                                self.__device_path, self.__speed, tools.efmt(ex))
             raise GpioDriverOfflineError(self)
 
     async def __close_device(self) -> None:
diff --git a/kvmd/plugins/ugpio/xh_hk4401.py b/kvmd/plugins/ugpio/xh_hk4401.py
index 7e064df9..d7a47679 100644
--- a/kvmd/plugins/ugpio/xh_hk4401.py
+++ b/kvmd/plugins/ugpio/xh_hk4401.py
@@ -157,9 +157,9 @@ class Plugin(BaseUserGpioDriver):  # pylint: disable=too-many-instance-attribute
                             if self.__protocol == 2:
                                 self.__channel_queue.put_nowait(channel)
 
-            except Exception as err:
+            except Exception as ex:
                 self.__channel_queue.put_nowait(None)
-                if isinstance(err, serial.SerialException) and err.errno == errno.ENOENT:  # pylint: disable=no-member
+                if isinstance(ex, serial.SerialException) and ex.errno == errno.ENOENT:  # pylint: disable=no-member
                     logger.error("Missing %s serial device: %s", self, self.__device_path)
                 else:
                     logger.exception("Unexpected %s error", self)