Re: [PATCH] io_setup.2: SYNOPSIS: return long

[Alejandro Colomar <colomar.6.4.3@gmail.com>]

On 2020-11-02 14:09, Michael Kerrisk (man-pages) wrote:
> Hi Alex,
> 
> On Mon, 2 Nov 2020 at 13:20, Alejandro Colomar <colomar.6.4.3@gmail.com> wrote:
>>
>> On 2020-11-02 08:37, Michael Kerrisk (man-pages) wrote:
>>   > Hi Alex,
>>   >
>>   > On 11/1/20 2:59 PM, Alejandro Colomar wrote:
>>   >> The Linux kernel uses a long as the return type for this syscall.
>>   >> As glibc provides no wrapper, use the same types the kernel uses.
>>   >
>>   > I think we need this patch for all of the io* pages, right?
>>
>> Hi Michael,
>>
>> For some reason, no.  AFAICS, only io_setup() really uses 'long'.
> 
> But is not SYSCALL_DEFINEX() producing a prototype with return value
> 'long' in all the cases? (I have not checked, I just presume so.)

Hi Michael,

Well, yes.
SYSCALL_DEFINEx() produces a return type of long
for _all_ syscalls, AFAICS.
(as I said before, that macro is a bit obscure, but I can read that).

Would you like to change all syscall man pages (without a wrapper)
to use long as the return type?

Thanks.

Alex

> 
> Thanks,
> 
> Michael
> 
> 
> 
>