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Serial port programming under Linux: when legacy comes back to haunt you

Programming serial ports on Linux (and other POSIX-compatible systems) can be tricky, because a lot of legacy is involved here. As a general resource, Michael R. Sweet's Serial Programming Guide for POSIX Operating Systems is an invaluable resource. What I found out the hard way is that one actually needs to carefully look at all available flags, otherwise legacy settings can come back to haunt you.

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