Po Lu wrote:
> > Also, I don't know how Android records boot time so I'll cc this to Po
> > Lu, the main developer for Emacs on Android.
> 
> The boot time is off limits to user programs on Android, for security
> reasons.

No, it isn't. The attached file, when compiled and run under Termux (which
doesn't have particular permissions), prints e.g.:

from clock  : 1691616762.476870660 = 2023-08-09 21:32:42.476870660
from sysinfo: 1691616762.329261637 = 2023-08-09 21:32:42.329261637

Note that this uses the kernel's uptime counter, so it will not work well
when the user changes the current time manually. But this is rare on Android.

Bruno