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A simple daemonless system for broadcasting messages locally.
bus uses a System V semaphore array and System V shared memory.
Buses are named; the key of the semaphore array and the
shared memory is stored in a regular file.
Communication over bus is synchronous. The broadcast call does
not return until all listeners have received (and copyied)
the message.
The software package contains a C library and a command line
utility. The package python-bus provides a Python 3 module.
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