[linux] Add `SocketCan::open()` error handling, properly close socket

modm-io / modm

modm: a C++23 library generator for AVR and ARM Cortex-M devices

https://modm.io

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Closed chris-durand closed 1 year ago

chris-durand commented 1 year ago

[x] Add error handling to SocketCan, opening a non-existing interface was succeeding before
[x] Really close interface and do not leak file descriptor

@Javask