[PATCH v2] zic, various tests: use 64-bit stat/ftw/readdir functions

[Nick Alcock]

On 26 Jun 2017, Joseph Myers said:

> On Mon, 26 Jun 2017, Nick Alcock wrote:
>
>> Index: glibc/io/bug-ftw2.c
>> ===================================================================
>> --- glibc.orig/io/bug-ftw2.c	2017-06-26 11:32:54.460712810 +0100
>> +++ glibc/io/bug-ftw2.c	2017-06-26 11:33:38.730559302 +0100
>> @@ -69,7 +69,7 @@
>>  {
>>    mtrace ();
>>  
>> -  ftw (".", callback, 10);
>> +  ftw64 (".", callback, 10);
>>  
>>    if (! sawcur)
>>      {
>
> A test of ftw should arguably be using ftw exactly, not ftw64, and 
> probably be paired with a corresponding tests (using a shared test 
> skeleton) that tests the same things for ftw64.  I.e., adding appropriate 
> checks so this test doesn't fail for 64-bit inode numbers might be better, 
> to avoid changing what function this test tests.

i.e. UNSUPPORTED-out this test iff it EOVERFLOWs, and have another
bug-ftw64-2.c that uses ftw64 instead and is run unconditionally?

(And similarly for the other non-64 ftw tests, probably all using the
usual macro-expansion-and-#include trick to keep code duplication down.)

Makes considerable sense: I'll look at that shortly.