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Date:      Thu, 24 Jan 2013 11:20:51 -0500
From:      John Baldwin <jhb@freebsd.org>
To:        Mikolaj Golub <trociny@freebsd.org>
Cc:        Stanislav Sedov <stas@freebsd.org>, freebsd-hackers@freebsd.org, Robert Watson <rwatson@freebsd.org>
Subject:   Re: libprocstat(3): retrieve process command line args and environment
Message-ID:  <201301241120.52054.jhb@freebsd.org>
In-Reply-To: <20130123214949.GA3120@gmail.com>
References:  <20130119151253.GB88025@gmail.com> <201301231131.43972.jhb@freebsd.org> <20130123214949.GA3120@gmail.com>

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On Wednesday, January 23, 2013 4:49:50 pm Mikolaj Golub wrote:
> On Wed, Jan 23, 2013 at 11:31:43AM -0500, John Baldwin wrote:
> > On Wednesday, January 23, 2013 2:25:00 am Mikolaj Golub wrote:
> > > IMHO, after adding procstat_getargv and procstat_getargv, the usage of
> > > kvm_getargv() and kvm_getenvv() (at least in the new code) may be
> > > deprecated. As this is stated in the man page, BUGS section, "these
> > > routines do not belong in the kvm interface". I suppose they are part
> > > of libkvm because there was no a better place for them. procstat(1)
> > > prefers direct sysctl to them (so, again, code duplication, which I am
> > > going to remove adding procstat_getargv/envv).
> > 
> > Hmm, are you going to rewrite ps(1) to use libprocstat?  Or rather, is that a
> > goal someday?  That is one current consumer of kvm_getargv/envv.  That might
> > be fine if we want to make more tools use libprocstat instead of using libkvm
> > directly.
> 
> I didn't have any plans for ps(1) :-) That is why I wrote about "new
> code". But if you think it is good to do I might look at it one day...

I'm mostly hoping Robert chimes in to see if that was his intention for
libprocstat. :)  If we can ultimately replace all uses of kvm_get*v() with
calls to procstat_get*v*() then I'm fine with some code duplication in the
interim.

-- 
John Baldwin



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