Re: language lawyering: ftello/fseek/pread edition

[Alan Barrett <apb%cequrux.com@localhost>]

On Mon, 23 Mar 2015, Thomas Klausner wrote:
> Petri Hintukainen pointed out a problem in the NetBSD headers 
> about ftello/fseeko/pread:
>
> https://mailman.videolan.org/pipermail/libbdplus-devel/2015-March/000039.html
>
> Can someone please fix the issue, or explain why the argument is 
> wrong?

It's a little difficult to extract a problem report from that 
message, because the message is oriented towards how a user can 
achieve a desired result given what NetBSD is doing, rather than 
how NetBSD should be changed to improve standards conformance.

I think the issue is:  After #define _POSIX_C_SOURCE 200112L 
and #include <stdio.h>, fseeko() and ftello() should be declared, 
but in some unspecified version of NetBSD they are not declared.  
Similarly, after #define _POSIX_C_SOURCE 200112L and #include 
<unistd.h>, pread() and pwrite() should be declared but they are 
not.

I agree that fseeko(), ftello(), pread(), and pwrite(), should 
be declared when _POSIX_C_SOURCE >= 200112L.  I see that 
NetBSD-current fails to do so.  The obvious addition of "|| 
(_POSIX_C_SOURCE - 0) >= 200112L" in appropriate places in stdio.h 
and unistd.h should fix it.

--apb (Alan Barrett)