Access to structure in <sys/user.h>

[Chris Torek]

In article <96 at osupyr.UUCP> dusan at osupyr.UUCP (Dusan Nedeljkovic) writes:
>Does anyone have any clues as to how to access the "user" structure
>in <sys/user.h> ?

For anyone with source, the answer is `do what ``ps'' does'.  For those
on a 4BSD Vax, there is a terribly hacky shortcut if you want to read
only your own user structure.  It is already in your address space.

	#include <sys/param.h>
	#include <sys/dir.h>
	#include <sys/user.h>

	main()
	{
		struct user u;
		
		u = *(struct user *)(0x80000000 - UPAGES*NBPG);
		printf("%d %d\n", u.u_uid, u.u_gid);
	}

`Undocumented features are subject to change without notice.'
-- 
In-Real-Life: Chris Torek, Univ of MD Comp Sci Dept (+1 301 454 7690)
UUCP:	seismo!mimsy!chris	ARPA/CSNet:	chris at mimsy.umd.edu