RE: Porting git to HP NonStop

> From: Brandon Casey [mailto:drafnel@gmail.com]
> Sent: Wednesday, August 22, 2012 7:01 PM
> To: Joachim Schmitz
> Cc: Junio C Hamano; Shawn Pearce; git@vger.kernel.org;
> rsbecker@nexbridge.com
> Subject: Re: Porting git to HP NonStop
> 
> On Wed, Aug 22, 2012 at 9:30 AM, Joachim Schmitz <jojo@schmitz-digital.de>
> wrote:
> 
> > OK, so how about this:
> > /usr/local/bin/diff -EBbu ./compat/mkdir.c.orig ./compat/mkdir.c
> > --- ./compat/mkdir.c.orig       2012-08-21 05:02:11 -0500
> > +++ ./compat/mkdir.c    2012-08-21 05:02:11 -0500
> > @@ -0,0 +1,24 @@
> > +#include "../git-compat-util.h"
> > +#undef mkdir
> > +
> > +/* for platforms that can't deal with a trailing '/' */ int
> > +compat_mkdir_wo_trailing_slash(const char *dir, mode_t mode) {
> > +       int retval;
> > +       char *tmp_dir = NULL;
> > +       size_t len = strlen(dir);
> > +
> > +       if (len && dir[len-1] == '/') {
> > +               if ((tmp_dir = strdup(dir)) == NULL)
> > +                       return -1;
> > +               tmp_dir[len-1] = '\0';
> > +       }
> > +       else
> > +               tmp_dir = (char *)dir;
> > +
> > +       retval = mkdir(tmp_dir, mode);
> > +       if (tmp_dir != dir)
> > +               free(tmp_dir);
> > +
> > +       return retval;
> > +}
> 
> Why not rearrange this so that you assign to dir the value of tmp_dir and then
> just pass dir to mkdir.  Then you can avoid the recast of dir to (char*) in the
> else branch.  Later, just call free(tmp_dir).  Also, we have xstrndup.  So I think
> the body of your function can become something like:
> 
>    if (len && dir[len-1] == '/')
>        dir = tmp_dir = xstrndup(dir, len-1);