mirror of
https://github.com/LadybirdBrowser/ladybird.git
synced 2024-09-21 10:19:03 +03:00
78 lines
2.8 KiB
C++
78 lines
2.8 KiB
C++
/*
|
|
* Copyright (c) 2020, Nico Weber <thakis@chromium.org>
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions are met:
|
|
*
|
|
* 1. Redistributions of source code must retain the above copyright notice, this
|
|
* list of conditions and the following disclaimer.
|
|
*
|
|
* 2. Redistributions in binary form must reproduce the above copyright notice,
|
|
* this list of conditions and the following disclaimer in the documentation
|
|
* and/or other materials provided with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
|
|
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
|
|
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
|
|
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
|
|
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
|
|
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
|
|
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
#include <LibCore/ArgsParser.h>
|
|
#include <math.h>
|
|
#include <sys/time.h>
|
|
#include <unistd.h>
|
|
|
|
int main(int argc, char** argv)
|
|
{
|
|
#ifdef __serenity__
|
|
if (pledge("stdio settime", nullptr) < 0) {
|
|
perror("pledge");
|
|
return 1;
|
|
}
|
|
#endif
|
|
|
|
Core::ArgsParser args_parser;
|
|
double delta = __builtin_nan("");
|
|
args_parser.add_option(delta, "Adjust system time by this many seconds", "set", 's', "delta_seconds");
|
|
args_parser.parse(argc, argv);
|
|
|
|
if (__builtin_isnan(delta)) {
|
|
#ifdef __serenity__
|
|
if (pledge("stdio", nullptr) < 0) {
|
|
perror("pledge");
|
|
return 1;
|
|
}
|
|
#endif
|
|
} else {
|
|
long delta_us = static_cast<long>(round(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;
|
|
}
|
|
if (adjtime(&delta_timeval, nullptr) < 0) {
|
|
perror("adjtime set");
|
|
return 1;
|
|
}
|
|
}
|
|
|
|
timeval remaining_delta_timeval;
|
|
if (adjtime(nullptr, &remaining_delta_timeval) < 0) {
|
|
perror("adjtime get");
|
|
return 1;
|
|
}
|
|
double remaining_delta = remaining_delta_timeval.tv_sec + remaining_delta_timeval.tv_usec / 1'000'000.0;
|
|
printf("%f\n", remaining_delta);
|
|
|
|
return 0;
|
|
}
|