Re: [patch] getnameinfo.3: Fix _POSIX_C_SOURCE value for getaddrinfo()

[Sebastian Kirmayer <sebastian@kirmayer.de>]

Hi Michael,

On Sun, Nov 22, 2020 at 11:42:02PM +0100, Michael Kerrisk (man-pages) wrote:
> Hi Sebastian,
> 
> On 11/22/20 11:37 PM, Sebastian Kirmayer wrote:
> > The minimum value of _POSIX_C_SOURCE for getnameinfo() was mistyped as 201112L
> > (not a real POSIX version), it should be 200112L. This is the same typo that
> > was fixed for getaddrinfo.3 in commit 94db8ae1824ada8561c3dbbbed88a8a9175c4886
> > 
> > According to the current documentation, this file should not compile, but
> > it does:
> > 
> >     #define _POSIX_C_SOURCE 200112L
> >     #include <netdb.h>
> >     int (*mygetnameinfo)() = getnameinfo;
> > 
> > (If _POSIX_C_SOURCE is changed to 200111L, the program does no longer compile.)
> > 
> > man3/getnameinfo.3:
> > 
> > @@ -27,7 +27,7 @@ Feature Test Macro Requirements for glibc (see
> >  .RE
> >  .PP
> >  .BR getnameinfo ():
> > -    Since glibc 2.22: _POSIX_C_SOURCE >= 201112L
> > +    Since glibc 2.22: _POSIX_C_SOURCE >= 200112L
> >      Glibc 2.21 and earlier: _POSIX_C_SOURCE
> >  .ad b
> >  .SH DESCRIPTION
> 
> Thanks for taking the time to report, but I think you must be looking
> at a rather old version of the manual pages. It looks like that typo
> was fixed about three years ago in the Git tree!
> 
> Thanks,
> 
> Michael

Oops, I accidently wrote getaddrinfo() in the subject. I meant to write
getnameinfo(), and I'm actually referencing the commit from three years
ago fixing it for getaddrinfo().

Sebastian