This change from UUCP style lockfiles to flock() is still lacking
follow-through of communication with the broader Linux community. Many Linux
programs would still be using the older UUCP style locking of serial ports I
think.
I've sent a message to the Serial HOWTO author David Lawyer regardin
> lockdev implements a library interface around the SYSV-style UUCP
> device locks for TTY devices. However, this type of locking is
> deprecated and unnecessary, at least on Linux. The recommended
> alternative is direct use of flock(2) on the corresponding device
> node.
This deprecation isn't
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