🚀 go-pugleaf

There's another way to implement nap which also works;
that is to implement a new device to which you ioctl to
get the appropriate number of naps. I put it in our
11/23 v7 system two years ago after getting it off the
net, and transferred it to our 3220 last fall. If anyone
wants it, let me know. All it requires is a cdevsw entry,
a /usr/sys/dev/nap.c, and a mknod of /dev/nap. A /usr/src/libc/gen/nap.c
routine calls the ioctl for you as nap(3), or you can do it
by hand.

If anyone wants this, let me know. Since the system-call
approach has already been posted, you may want to use that
one instead. I don't think there's much technical reason
to prefer either one. The code for the one I use, since it's
in C, is more portable than the posted assembler source.

Dave Sherman
-- 
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