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Date: Wed, 15 Jan 2003 17:22:19 +0100
From: DervishD <raul@pleyades.net>
To: Jakob Oestergaard <jakob@unthought.net>, jw schultz <jw@pegasys.ws>,
       Linux-kernel <linux-kernel@vger.kernel.org>
Subject: Re: Changing argv[0] under Linux.
Message-ID: <20030115162219.GB86@DervishD>
References: <Pine.LNX.3.95.1030114140811.13496A-100000@chaos.analogic.com> <87iswrzdf1.fsf@ceramic.fifi.org> <20030114220401.GB241@DervishD> <20030114230418.GB4603@doc.pdx.osdl.net> <20030114231141.GC4603@doc.pdx.osdl.net> <20030115044644.GA18608@mark.mielke.cc> <20030115082527.GA22689@pegasys.ws> <20030115114130.GD66@DervishD> <20030115131617.GA8621@unthought.net>
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    Hi Jakob :)

> >     Really, I'm thinking seriously about not rewritting argv[0] at
> > all. The problem is that may confuse the user when issuing 'ps' or
> > looking at /proc :((
> What about
[...]

    Mmm, interesting idea. A simpler solution is just copy the needed
argv0. In your example, about 500 bytes are wasted ;))) By using the
needed size at argv0, we have the space needed.

    If execv doesn't do any magic with the supplied argv array, then
this should work.

> For the same effect without the --very-magic argument, you could simply
> do an "if (argc != 2 || strlen(argv[0]) != 511)" instead.

    No, because the len of argv[0] being 'my proggy' is 9, that is not
511 ;)) We cannot tell the allocated space, I'm afraid O:)
 
> Am I smoking crack, or could the above work?

    I should smoke crack, definitely. That way I would not mess with
that argv thing XDDDD

    Thanks :)
    Ra?l
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