How to implement a driver's read and write operations with synchronization properly

[Valdis.Kletnieks at vt.edu]

On Tue, 29 Jul 2014 20:59:08 +0700, Anh Le said:

> still, user programs like bash could have a race problem by spliting
> the input, I hope that they can somehow take care of this problem
> themselves.

stdio is *not* always your friend.  fopen/fprintf is prone to splitting on
bugger boundaries without your knowing about it, but most language bindings
(including the Perl you tested with) allow you to use open/write and do the
buffer management yourself

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