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From: guy@auspex.auspex.com (Guy Harris)
Newsgroups: comp.unix.internals
Subject: Re: Multiplexed Special Devices
Message-ID: <4181@auspex.auspex.com>
Date: 12 Oct 90 18:49:09 GMT
References: <6633@ncrcae.Columbia.NCR.COM> <4171@auspex.auspex.com> <18584@rpp386.cactus.org>
Organization: Auspex Systems, Santa Clara
Lines: 9


 >IBM has them in AIX v3.1 as multiplexed character devices.  each
 >open returns a different channel.  Thus, the PTY device driver is
 >a multiplexed character device.  When you want a PTY pair you open
 >/dev/pts and see what you got.  Then you open the /dev/ptc that
 >matches, and you have a PTY all to yourself.

That's a clone device, not a V7-style multiplexed character device; the
latter is what was being asked about.