[Toybox] uptime -s

[enh]

strace suggests coreutils reads /proc/uptime while busybox and toybox
use sysinfo(2).

On Thu, May 14, 2020 at 4:49 PM Ryan Prichard <rprichard at google.com> wrote:
>
> FWIW, the GNU "uptime -s" reports my seconds as 31, whereas busybox and toybox alternate between 29 and 30.
>
> $ uptime -s
> 2020-05-11 13:58:31
>
> $ for i in $(seq 5); do sleep 0.5; busybox uptime -s; /x/toybox/toybox uptime -s; done
> 2020-05-11 13:58:30
> 2020-05-11 13:58:30
> 2020-05-11 13:58:29
> 2020-05-11 13:58:29
> 2020-05-11 13:58:30
> 2020-05-11 13:58:30
> 2020-05-11 13:58:29
> 2020-05-11 13:58:29
> 2020-05-11 13:58:30
> 2020-05-11 13:58:30
>
> -Ryan
>
>
> On Thu, May 14, 2020 at 4:33 PM enh via Toybox <toybox at lists.landley.net> wrote:
>>
>> http://landley.net/notes.html#02-05-2020
>>
>> Let's see:
>>
>> $ cat /proc/uptime
>> 11514340.14 18323433.75
>>
>> Um, I'm guessing first number is runtime and second is suspend time
>> (in seconds) since last reboot, toybox date -d @$(($(date
>> +%s)-18323433)) says I last rebooted near the start of October. Yeah,
>> sounds about right. I should probably do that so the kernel has a
>> chance to refresh itself for security whatsits.
>>
>>
>>
>>
>>
>> it was people wanting to avoid exactly that kind of shell gymnastics
>> that made me add -s to uptime :-)
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