linux-kernel - Re: [PATCH] argv_split: allow argv_split to handle NULL pointer in argcp parameter gracefully

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Date:	Tue, 31 Jul 2007 13:12:55 -0400
From:	Neil Horman <nhorman@...driver.com>
To:	Jeremy Fitzhardinge <jeremy@...p.org>
Cc:	akpm@...ux-foundation.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] argv_split: allow argv_split to handle NULL pointer in argcp parameter gracefully

On Tue, Jul 31, 2007 at 09:56:35AM -0700, Jeremy Fitzhardinge wrote:
> Neil Horman wrote:
> > As Jeremy and I had discussed in a previous thread, it would be nice if the
> > argv_split library function could gracefully handle a NULL pointer in the argcp
> > parameter, so as to allow functions using it that did not care about the value
> > of argc to not have to declare a useless variable.  This patch accomplishes
> > that.  Tested by me, with successful results.
> >   
> 
> Oh, one other thing.  Could you do a patch to clean up the use in the
> usermodehelper code?
> 
I have a patch for it already, which is rolled into some other work I'm doing in
there.  Since I had a bit of a false start with the recent coredump work, now
that its in -mm I want to give that a chance to settle out and get some testing.
Once its gotten a few weeks of testing and no one else pops up with some other
requests/additions/etc, I'll post my cleanups, which will include your request
above.

Regards
Neil

>     J
> > Thanks & Regards
> > Neil
> >
> > Signed-off-by: Neil Horman <nhorman@...driver.com>
> >
> >
> >  argv_split.c |    4 +++-
> >  1 file changed, 3 insertions(+), 1 deletion(-)
> >
> >
> > diff --git a/lib/argv_split.c b/lib/argv_split.c
> > index 4096ed4..fad6ce4 100644
> > --- a/lib/argv_split.c
> > +++ b/lib/argv_split.c
> > @@ -75,7 +75,9 @@ char **argv_split(gfp_t gfp, const char *str, int *argcp)
> >  	if (argv == NULL)
> >  		goto out;
> >  
> > -	*argcp = argc;
> > +	if (argcp)
> > +		*argcp = argc;
> > +
> >  	argvp = argv;
> >  
> >  	while (*str) {
> >   

-- 
/***************************************************
 *Neil Horman
 *Software Engineer
 *Red Hat, Inc.
 *nhorman@...driver.com
 *gpg keyid: 1024D / 0x92A74FA1
 *http://pgp.mit.edu
 ***************************************************/
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