Scripts don't work if user doesn't have write permission to CWD

[HiassofT]

Operating system: RPiOS Bookwork lite 64bit
Python version: 3.11.2
Pi model: Pi 5
GPIO Zero version: 2.0
Pin factory used: default / lgpio

Trying to run a gpiozero script from a directory where the user doesn't have write permissions fails miserably as lgpio tries to create a named pipe in that directory. eg:

from gpiozero import Button

b5 = Button(5)

Then run this script eg as user pi from the root directory

pi@raspberrypi:~ $ cd /
pi@raspberrypi:/ $ python3 ~/gpiotest.py 
2024-01-09 14:52:43 xCreatePipe: Can't set permissions (436) for //.lgd-nfy0, No such file or directory
/usr/lib/python3/dist-packages/gpiozero/devices.py:295: PinFactoryFallback: Falling back from lgpio: [Errno 2] No such file or directory: '.lgd-nfy-3'
  warnings.warn(
Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/gpiozero/pins/pi.py", line 408, in pin
    pin = self.pins[info]
          ~~~~~~~~~^^^^^^
KeyError: PinInfo(number=29, name='GPIO5', names=frozenset({'GPIO5', 5, 'BOARD29', 'WPI21', '5', 'J8:29', 'BCM5'}), pull='', row=15, col=1, interfaces=frozenset({'', 'dpi', 'spi', 'gpio', 'uart', 'i2c'}))

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/home/pi/gpiotest.py", line 3, in <module>
    b5 = Button(5)
         ^^^^^^^^^
  File "/usr/lib/python3/dist-packages/gpiozero/devices.py", line 103, in __call__
    self = super().__call__(*args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3/dist-packages/gpiozero/input_devices.py", line 412, in __init__
    super().__init__(
  File "/usr/lib/python3/dist-packages/gpiozero/mixins.py", line 417, in __init__
    super().__init__(*args, **kwargs)
  File "/usr/lib/python3/dist-packages/gpiozero/input_devices.py", line 162, in __init__
    super().__init__(
  File "/usr/lib/python3/dist-packages/gpiozero/mixins.py", line 243, in __init__
    super().__init__(*args, **kwargs)
  File "/usr/lib/python3/dist-packages/gpiozero/input_devices.py", line 79, in __init__
    super().__init__(pin, pin_factory=pin_factory)
  File "/usr/lib/python3/dist-packages/gpiozero/devices.py", line 549, in __init__
    pin = self.pin_factory.pin(pin)
          ^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3/dist-packages/gpiozero/pins/pi.py", line 410, in pin
    pin = self.pin_class(self, info)
          ^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3/dist-packages/gpiozero/pins/rpigpio.py", line 101, in __init__
    GPIO.setup(self._number, GPIO.IN, self.GPIO_PULL_UPS[self._pull])
RuntimeError: Cannot determine SOC peripheral base address

Running the script from a directory where the user has write permission works but after exit the current working directory is cluttered with a name pipe:

pi@raspberrypi:/ $ cd ~
pi@raspberrypi:~ $ python3 gpiotest.py 
pi@raspberrypi:~ $ ls -la .lgd*
prw-rw-r-- 1 pi pi 0 Jan  9 15:07 .lgd-nfy0
pi@raspberrypi:~ $ 

lgpio seems to have a lguSetWorkDir function and a LG_WD environment variable to configure the directory where it creates it's pipe(s) and it might be a good idea to set that to something safe like /tmp/gpiozero-PID/ that's guaranteed to be writable and not clash when running multiple scripts using gpiozero/lgpio in parallel - that seems to be the recommended solution until the underlying lgpio issue joan2937/lg#12 is resolved

[m666m]

This file .lgd-nfy0 exists in the directorys with running pinout, everytime everywhere...