On 06/02/2014 04:32 PM, Theodore Ts'o wrote:
> On Mon, Jun 02, 2014 at 03:32:35PM -0700, H. Peter Anvin wrote:
>> On 06/02/2014 03:29 PM, Theodore Ts'o wrote:
>>>
>>> And since we are already returning (time_t) -1 in some cases, we might
>>> as well try to make things a bit more formal.
>>>
>>
>> Are we? I am not aware of *Linux* actually using that.
>
> Linux's time(2) can return (time_t) -1 and set errno to EFAULT, per
> the Posix specification:
>
> SYSCALL_DEFINE1(time, time_t __user *, tloc)
> {
> time_t i = get_seconds();
>
> if (tloc) {
> if (put_user(i,tloc))
> return -EFAULT;
> }
> force_successful_syscall_return();
> return i;
> }
>
OK, I guess I should have said... other than for -EFAULT.
I just don't know of anyone using time(2) with an argument other than NULL.
-hpa
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