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buses/uart: Use 'lockf()' for serial locking #637

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buses/uart: Use 'lockf()' for serial locking #637

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Commits on Apr 13, 2021

  1. buses/uart: Use 'lockf()' for serial locking 

    Using this standard Linux mechanism to lock serial ports has the advantage that if the process is killed the lock is automatically released.

Before a lock was simulated using the custom termios 'c_iflag' value 0x80000000, which has the disadvantage, other than being non-standard, that if the process is killed before closing the serial port, it would appear as locked and require manual cleanup of the flag.

Signed-off-by: Giovanni Giacobbi <[email protected]>
    @thg2k
    thg2k committed Apr 13, 2021
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