Re: Possible unsafe use of strncat in sbin/sysctl/sysctl.c

[Marc Balmer <mbalmer%NetBSD.org@localhost>]

Am 24.08.11 00:08, schrieb Joerg Sonnenberger:
> On Tue, Aug 23, 2011 at 09:58:53PM +0000, David Holland wrote:
>> On Tue, Aug 23, 2011 at 11:52:11PM +0200, Marc Balmer wrote:
>>  > (void)wait!  That was a pure personal remark.  I really don't know where
>>  > that (void)bla idiom comes from, and I obviously don't (void)like it.
>>
>> It's an artifact of our stupid lint(1).
> 
> Not really, it is used by other analyzers to mean "yes, I know this
> returns something, but I don't care". The major exception of course is
> that GCC broke it for the attributed usage -- half of the pain of
> dealing with modern glibc in this regard.

But that is kind of, well, unneeded.  A compiler can detect that I don't
use the return value by seeing that I don't use the return value.

Why tell the compiler that I don't want to use the return value?  It's a
stupid rule, to say the least.

Next thing will be adding a (really) and (maybe) statement to functions
which we really or maybe want to execute, and maybe (never) for
functions that we never call:

int (really)
main(int argc, char *argc[])
{
}


int (maybe)
othermain(void)
{
}

void (never)
dontdothisathome(void)
{
        /* NOTREACHED */
}