Access to user process info.

[Dusan Nedeljkovic]

Briefly:  I need to get access to information about a certain (or
	  more generally, ALL) processes that are active and bound
	  to a terminal.  
	  (I also have read access to all pertinent files.)


Machine:  Pyramid 90x running BSD Unix 4.2

	  I've sent news out about this, and have gotten conflicting
	  suggestions...some people say to access <sys/user.h> in
	  /dev/kmem and /vmunix -- but I've had no success with this;
	  still others say that I am on the wrong track, because this
	  information varies across machines so that it can't be done
	  using the structures in <sys/user.h>.

	  I guess, what I'm really asking is how the unix utility "w"
	  gets its information from the system about active processes.

	  To refresh your memory, I've included some sample "w" output:

	User     tty       login@  idle   JCPU   PCPU  what
	dusan    ttyi02    7:24pm         1:06     28  w
	alden    ttyi03    5:29pm     2   7:03     22  emacs /etc/termcap
	gae      ttyi17    7:45pm            8      8  rn


	  How does "w" get all this useful info?  I can't imagine that
	  it doesn't use <sys/user.h>, etc.  

	  Any info would be GREATLY appreciated.  Thanks in advance.


Dusan.	(Ohio State Univ. -- Math/Sciences Computer Lab)
	(             Columbus, OH  43210	       )
	*	dusan%osupyr.uucp at osu-eddie.uucp       *
	*	       cbatt!osupyr!dusan	       *
-- 

Dusan.	(Ohio State Univ. -- Math/Sciences Computer Lab)
	(             Columbus, OH  43210	       )
	*	dusan%osupyr.uucp at osu-eddie.uucp       *
	*	       cbatt!osupyr!dusan	       *