linux-kernel - Re: [PATCH] binfmt_misc: pass binfmt

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Date:   Fri, 6 Mar 2020 09:21:46 +0100
From:   Laurent Vivier <laurent@...ier.eu>
To:     Florian Weimer <fw@...eb.enyo.de>, YunQiang Su <syq@...ian.org>
Cc:     torvalds@...ux-foundation.org, gregkh@...uxfoundation.org,
        akpm@...ux-foundation.org, viro@...iv.linux.org.uk,
        James.Bottomley@...senpartnership.com,
        linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org,
        linux-arch@...r.kernel.org, linux-api@...r.kernel.org,
        libc-alpha@...rceware.org
Subject: Re: [PATCH] binfmt_misc: pass binfmt_misc P flag to the interpreter

Le 06/03/2020 à 09:13, Florian Weimer a écrit :
> * YunQiang Su:
> 
>> +	if (bprm->interp_flags & BINPRM_FLAGS_PRESERVE_ARGV0)
>> +		flags |= AT_FLAGS_PRESERVE_ARGV0;
>> +	NEW_AUX_ENT(AT_FLAGS, flags);
> 
> Is it necessary to reuse AT_FLAGS?  I think it's cleaner to define a
> separate AT_ tag dedicated to binfmt_misc.
> 

Not necessary, but it seemed simpler and cleaner to re-use a flag that
is marked as unused and with a name matching the new role. It avoids to
patch other packages (like glibc) to add it as it is already defined.

Thanks,
Laurent