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Date: Wed, 28 Dec 2022 10:31:37 -0500
From: Shawn Webb <shawn.webb@...denedbsd.org>
To: oss-security@...ts.openwall.com
Cc: Alejandro Colomar <alx.manpages@...il.com>,
Michael Kerrisk <mtk.manpages@...il.com>,
linux-kernel@...r.kernel.org, linux-man@...r.kernel.org
Subject: Re: [patch] proc.5: tell how to parse /proc/*/stat
correctly
On Wed, Dec 28, 2022 at 10:24:58AM -0500, Shawn Webb wrote:
> On Tue, Dec 27, 2022 at 04:44:49PM -0800, Lyndon Nerenberg (VE7TFX/VE6BBM) wrote:
> > Dominique Martinet writes:
> >
> > > But, really, I just don't see how this can practically be said to be parsable...
> >
> > In its current form it never will be. The solution is to place
> > this variable-length field last. Then you can "cut -d ' ' -f 51-"
> > to get the command+args part (assuming I counted all those fields
> > correctly ...)
> >
> > Of course, this breaks backwards compatability.
>
> It would also break forwards compatibility in the case new fields
> needed to be added.
>
> The only solution would be a libxo-style feature wherein a
> machine-parseable format is exposed by virtue of a file extension.
>
> Examples:
>
> 1. /proc/pid/stats.json
> 2. /proc/pid/stats.xml
> 3. /proc/pid/stats.yaml_shouldnt_be_a_thing
To expand upon this idea, lets define an example json file:
{
"schemaver": "20221228001",
"name": "cat",
"state": {
"raw": "R",
"intval": 1,
"Pretty": "(Running)",
},
"tgid": 5452,
"pid": 5452,
"ppid": 743,
"uid": {
"real": 501,
"effective": 501,
"saved_set": 501,
"fs": 501
}
}
And so on.
--
Shawn Webb
Cofounder / Security Engineer
HardenedBSD
https://git.hardenedbsd.org/hardenedbsd/pubkeys/-/raw/master/Shawn_Webb/03A4CBEBB82EA5A67D9F3853FF2E67A277F8E1FA.pub.asc
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