Berny Goodheart <berny at berwynlodge.com> wrote:

> >> IPC (Shared memory, Message queues, semaphores) <=== Already in SunOS-4
> But it was in SysV before SunOS-4. Much of Solaris IPC came from the SysV code together with POSIX IPC and some extras?.doors.

Doors are a backport from the "Spring" operating system from Bill Joy that he 
developed in Colorado after the SVr4 task was finished around 1992.

Spring was send to universities and research institutes in 1996 and then shut 
down, but doors were backported to Solaris for "nscd" the name service cache 
daemon.



Jörg

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