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Re: [PATCH] Use mode_t in open and friends
- From: Rich Felker <dalias at libc dot org>
- To: Paul Eggert <eggert at cs dot ucla dot edu>
- Cc: Rasmus Villemoes <rv at rasmusvillemoes dot dk>, libc-alpha at sourceware dot org
- Date: Fri, 25 Apr 2014 14:42:45 -0400
- Subject: Re: [PATCH] Use mode_t in open and friends
- Authentication-results: sourceware.org; auth=none
- References: <87k3afhsua dot fsf at rasmusvillemoes dot dk> <87a9banc4i dot fsf at igel dot home> <87bnvqj2rd dot fsf at rasmusvillemoes dot dk> <53591A82 dot 6010700 at cs dot ucla dot edu>
On Thu, Apr 24, 2014 at 07:06:58AM -0700, Paul Eggert wrote:
> gnulib attacks this problem by defining a macro PROMOTED_MODE_T that
> expands to 'int' on platforms where mode_t is narrower than int, and
> to 'mode_t' otherwise. This supports 'mode = va_arg (ap,
> PROMOTED_MODE_T);'. glibc could do something similar.
I thought glibc always had mode_t with rank >= int, but if not,
something like __typeof__(+(mode_t)0) would work just fine, since
glibc depends on GNU C extensions like __typeof__ anyway.
Rich