Re: [patch 2/4] permission mapping for sys_syslog operations

From: Randy Dunlap
Date: Fri Dec 15 2006 - 12:08:37 EST


On Thu, 14 Dec 2006 17:21:25 -0800 Zack Weinberg wrote:

> On 12/14/06, Randy Dunlap <randy.dunlap@xxxxxxxxxx> wrote:
> > > +#define security_syslog_or_fail(type) do { \
> > > + int error = security_syslog(type); \
> > > + if (error) \
> > > + return error; \
> > > + } while (0)
> > > +
> >
> > From Documentation/CodingStyle:
> >
> > Things to avoid when using macros:
> >
> > 1) macros that affect control flow: ...
>
> It says "avoid", not "never use". If you can think of another way to
> code this function that won't completely obscure the actual operations
> with the security checks, I will be happy to change it.

The usual answer is to just open-code it. You may dislike that,
but hiding control flow in macros is held as really bad by
more than just me.

---
~Randy
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