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/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <AK/String.h>
#include <LibCore/ArgsParser.h>
#include <LibCore/DateTime.h>
#include <LibCore/System.h>
#include <LibMain/Main.h>
#include <time.h>
ErrorOr<int> serenity_main(Main::Arguments arguments)
{
TRY(Core::System::pledge("stdio settime rpath"));
bool print_unix_date = false;
bool print_iso_8601 = false;
bool print_rfc_3339 = false;
bool print_rfc_5322 = false;
char const* set_date = nullptr;
StringView format_string;
Core::ArgsParser args_parser;
args_parser.add_option(set_date, "Set system date and time", "set", 's', "date");
args_parser.add_option(print_unix_date, "Print date as Unix timestamp", "unix", 'u');
args_parser.add_option(print_iso_8601, "Print date in ISO 8601 format", "iso-8601", 'i');
args_parser.add_option(print_rfc_3339, "Print date in RFC 3339 format", "rfc-3339", 'r');
args_parser.add_option(print_rfc_5322, "Print date in RFC 5322 format", "rfc-5322", 'R');
args_parser.add_positional_argument(format_string, "Custom format to print the date in", "format-string", Core::ArgsParser::Required::No);
args_parser.parse(arguments);
if (set_date != nullptr) {
auto number = String(set_date).to_uint();
if (!number.has_value()) {
warnln("date: Invalid timestamp value");
return 1;
}
timespec ts = { number.value(), 0 };
TRY(Core::System::clock_settime(CLOCK_REALTIME, &ts));
return 0;
}
if (print_unix_date + print_iso_8601 + print_rfc_3339 + print_rfc_5322 + !format_string.is_null() > 1) {
warnln("date: Multiple output formats specified");
return 1;
}
auto date = Core::DateTime::now();
if (!format_string.is_null()) {
// FIXME: If the string argument does not start with a '+' sign, POSIX says
// we should parse that as a date, and set the system time to it.
if (format_string.length() == 0 || format_string[0] != '+') {
warnln("date: Format string must start with '+'");
return 1;
}
outln("{}", date.to_string(format_string.substring_view(1)));
} else if (print_unix_date) {
outln("{}", date.timestamp());
} else if (print_iso_8601) {
outln("{}", date.to_string("%Y-%m-%dT%H:%M:%S%:z"sv));
} else if (print_rfc_5322) {
outln("{}", date.to_string("%a, %d %b %Y %H:%M:%S %z"sv));
} else if (print_rfc_3339) {
outln("{}", date.to_string("%Y-%m-%d %H:%M:%S%:z"sv));
} else {
outln("{}", date.to_string("%Y-%m-%d %H:%M:%S %Z"sv));
}
return 0;
}
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