"ps -e" without procfs(5)

Mikolaj Golub trociny at freebsd.org
Mon Oct 24 21:13:19 UTC 2011

On Sun, 16 Oct 2011 20:10:05 +0300 Kostik Belousov wrote:

 KB> In my opinion, the way to implement the feature is to (re)use
 KB> linprocfs_doargv() and provide another kern.proc sysctl to retrieve the
 KB> argv and env vectors. Then, ps(1) and procstat(1) can use it, as well as
 KB> procfs and linprocfs inside the kernel.

Thanks! I am testing a patch (without auxv vector so far) and have some

Original ps -e returns environment only for user owned processes (the access is
restricted by the permissions of /proc/pid/mem file). My kern.proc.env sysctl
does not have such a restriction. I suppose I should add it? What function I
could use for this?

BTW, linprocfs allows to read other user's environment.

 KB> While you are at the code, it would be useful to also export the auxv vector,
 KB> which is immediately before env.

It looks I can find the location of auxv but what about the size? Or do you
propose to extend struct ps_strings to store location and size of auxv? I
could do this way...

Mikolaj Golub

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