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SubjectRe: bug(?) in block_til_ready serial.c - open() blocking, 2.0 & 2.2
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> My program is partially based on serial-programmming-howto. May still contain
> some bugs. But it should not result in such a state of /dev/ttyS0. In my
> opinion serial.c uses too much undocumented features of Linux scheduler.

Try O_NDELAY as a flag

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