[pups] STYX and 2.11BSD licensing

[Steven M. Schultz]

Hi -

> From: Wolfgang Helbig <helbig at Informatik.BA-Stuttgart.DE>
> In UNIX V6/V7 the kernel reads the initial time from the superblock of the
> root file system. The timestamp is written each time the superblock is updated
> on disk.
	
	2.11 (and as far as I can remember all of the 2BSD family) do the
	same thing.

	The trouble is that the initial time upon boot can be seriously wrong.

	For example I haven't booted my 11/73 in a month or two - the date and
	time will be sometime in Jan or Feb.

	In the "PC" world there's the CMOS clock (set to GMT on all the systems
	I have) and a battery - when the system boots it can read the 
	correct/current/GMT date/time from the hardware (as can a 11/93 with 
	a TOY clock).

> BTW. in V6, the timezone offset was not coded into the kernel, but
> in the C-library source ctime.c. If you happen to live outside

	Yep - I had hoped to never have to remember _that_ again ;)

> Putting the timezone offset into the kernel like in V7 seems to be
> better, because you don't have to recompile all those commands.

	Right.

	It is only one module in the kernel (param.c) that needs to
	be recompiled - just edit param.c and that's the only module that will
	be rebuilt.

	Another way is to use 'adb -w -k ...' and patch the kernel and/or
	memory.

	Steven Schultz
	sms at moe.2bsd.com

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