fix: handle i2c device permissions errors gracefully #409
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Coveralls tests seems to be due to adding more lines to a chunk of code which was already untested. That code probably should be tested, but I'm not yet sure the most optimal way to do so. |
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Thanks for the changes! Sorry for the slow review, this got buried at the bottom of my inbox.
Coveralls tests seems to be due to adding more lines to a chunk of code which was already untested. That code probably should be tested, but I'm not yet sure the most optimal way to do so.
That's fine, small decreases are ok by me. I should probably change the threshold.
| except (OSError, VCPIOError): | ||
| pass | ||
| except VCPPermissionError as exc: | ||
| logging.error("Unable to check i2c device: %s", exc) |
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| logging.error("Unable to check i2c device: %s", exc) | |
| logging.exception("Unable to check i2c device") |
This adds native exception info into the logging record.
| else: | ||
| logging.error( | ||
| "Unable to check i2c device %s: no device number found", device | ||
| ) | ||
| continue |
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I am curious, have you seen this occur? pyudev should only return None if the device number is not a unicode string: https://github.com/pyudev/pyudev/blob/7588bc8c84bf1e994b31020452124bc6618625ce/src/pyudev/device/_device.py#L626-L651
| for device in pyudev.Context().list_devices(subsystem="i2c"): | ||
| vcp = LinuxVCP(device.sys_number) | ||
| try: | ||
| if sys_no := device.sys_number: |
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| if sys_no := device.sys_number: | |
| if (sys_no := device.sys_number) is None: |
I think 0 is a valid device.sys_number.
2 participants
This fix gracefully handles i2c devices which we do not have permissions to open; this means that we no longer have to have every i2c device on the system accessible by the current user in order to use the tool.