Fwd: why are init's arguments wiped ?

[Mike Frysinger]

On 02 Feb 2016 00:09, Didier Kryn wrote:
> Le 01/02/2016 23:34, Mike Frysinger a écrit :
> > On 01 Feb 2016 22:33, Didier Kryn wrote:
> >> Le 01/02/2016 18:10, Mike Frysinger a écrit :
> >>> it makes a lot of sense when you fork children that have specific purposes.
> >>> rather than just seeing the program's name 4 times, it's more helpful for
> >>> them to be broken up.
> >>       prctl() can be used for that, with the operation code PR_SET_NAME.
> >> It does not change the command line.
> > right, but that has its own limitations:
> > - it's new to linux-2.6.9
> > - can only set the name
> > - is limited to 16 bytes
> > - can't change command line args
> >
> > so we're still stuck with this behavior of modifying the argv mem directly :(
>
>      IIUC your argument was there's a need to give sensible names to 
> children. prctl() allows this *without* resorting to modifying the 
> command line args. I don't find 16 chars (in reality 15) is short for 
> the purpose.

if you look at the examples i already posted, 16 is too small for every
one there.  when i've munged the `ps` listing in the past, i've also
easily run past 16 bytes.  your cases might be short, but that doesn't
mean every scenario is that way.
-mike
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