Re: [RFC v1 05/16] sysdeps/getrlimit: Use __NR_prlimit64 if avaliable

[Arnd Bergmann <arnd at arndb dot de>]

On Sat, Jun 22, 2019 at 6:47 AM Alistair Francis
<alistair.francis@wdc.com> wrote:

> diff --git a/sysdeps/unix/sysv/linux/getrlimit.c b/sysdeps/unix/sysv/linux/getrlimit.c
> index 10c0176619..2917029afd 100644
> --- a/sysdeps/unix/sysv/linux/getrlimit.c
> +++ b/sysdeps/unix/sysv/linux/getrlimit.c
> @@ -35,7 +35,11 @@
>  int
>  __new_getrlimit (enum __rlimit_resource resource, struct rlimit *rlim)
>  {
> +#ifdef __NR_prlimit64
> +  return INLINE_SYSCALL_CALL (prlimit64, 0, resource, rlim, NULL);
> +#else
>    return INLINE_SYSCALL_CALL (ugetrlimit, resource, rlim);
> +#endif
>  }
>  weak_alias (__new_getrlimit, __getrlimit)
>  hidden_weak (__getrlimit)

This breaks all other 32-bit architectures, since glibc traditionally uses
32-bit limits even on architectures that always supported the 64-bit
interface.

      Arnd