Re: ps under FreeBSD

From: Guillaume PELAT (guillaume.pelatat_private)
Date: Sun May 19 2002 - 02:53:07 PDT

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    On Saturday 18 May 2002 18:57, Jakub Filonik wrote:
> Hi,
> I was playing with ps on FreeBSD with kern.ps_showallprocs=0 and I was
> surprised when I have seen that I may see info about running process, if I
> know it's ID

After some investigation, the problem seems to be in sysctl_kern_proc
function in /sys/kern/kern_proc.c

The following patch seems to fix the problem(for freebsd 4.5):

diff -dru sys/kern/kern_proc.c sys.new/kern/kern_proc.c
--- sys/kern/kern_proc.c	Tue May  1 15:39:06 2001
+++ sys.new/kern/kern_proc.c	Sat May 18 15:27:57 2002
@@ -453,6 +453,8 @@
 			return (0);
 		if (!PRISON_CHECK(curproc, p))
 			return (0);
+		if ((!ps_showallprocs) && p_trespass(curproc, p))
+			return (0);
 		error = sysctl_out_proc(p, req, 0);
 		return (error);
 	}

--
Guillaume Pelat

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