mirror of
https://github.com/LadybirdBrowser/ladybird.git
synced 2024-11-29 11:00:29 +00:00
43 lines
1.3 KiB
C++
43 lines
1.3 KiB
C++
/*
|
|
* Copyright (c) 2020, Nico Weber <thakis@chromium.org>
|
|
* Copyright (c) 2022, Matthias Zimmerman <matthias291999@gmail.com>
|
|
*
|
|
* SPDX-License-Identifier: BSD-2-Clause
|
|
*/
|
|
|
|
#include <LibCore/ArgsParser.h>
|
|
#include <LibCore/System.h>
|
|
#include <math.h>
|
|
#include <sys/time.h>
|
|
#include <unistd.h>
|
|
|
|
ErrorOr<int> serenity_main(Main::Arguments arguments)
|
|
{
|
|
TRY(Core::System::pledge("stdio settime"));
|
|
|
|
Core::ArgsParser args_parser;
|
|
Optional<double> delta;
|
|
args_parser.add_option(delta, "Adjust system time by this many seconds", "set", 's', "delta_seconds");
|
|
args_parser.parse(arguments);
|
|
|
|
if (delta.has_value()) {
|
|
long delta_us = lround(*delta * 1'000'000);
|
|
timeval delta_timeval;
|
|
delta_timeval.tv_sec = delta_us / 1'000'000;
|
|
delta_timeval.tv_usec = delta_us % 1'000'000;
|
|
if (delta_timeval.tv_usec < 0) {
|
|
delta_timeval.tv_sec--;
|
|
delta_timeval.tv_usec += 1'000'000;
|
|
}
|
|
TRY(Core::System::adjtime(&delta_timeval, nullptr));
|
|
}
|
|
|
|
TRY(Core::System::pledge("stdio"));
|
|
|
|
timeval remaining_delta_timeval;
|
|
TRY(Core::System::adjtime(nullptr, &remaining_delta_timeval));
|
|
double remaining_delta = remaining_delta_timeval.tv_sec + remaining_delta_timeval.tv_usec / 1'000'000.0;
|
|
outln("{}", remaining_delta);
|
|
|
|
return 0;
|
|
}
|