Multiplexed Special Devices

Michael Paddon mwp at ubeaut.oz.au
Fri Oct 19 12:08:56 AEST 1990


>From article <6633 at ncrcae.Columbia.NCR.COM>, by porr at ncrcae.Columbia.NCR.COM (Greg Porr):
> 
> Does anyone know the origin of the "Multiplexed Character Special" (IFMPC)
> and "Multiplexed Block Special" (IFMPB) device types?  These are defined
> in the inode.h header file as it comes in all Releases of System V, but
> I've never seen it used in any kernel source.

There used to be multiplexed files in 7th Edition. From memory, these were
basically named pipes with multiple 'channels'.

					Michael

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