ladybird/Libraries/LibCore/TimeZoneWatcherLinux.cpp

62 lines
1.7 KiB
C++

/*
* Copyright (c) 2024, Tim Flynn <trflynn89@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <AK/Platform.h>
#include <LibCore/FileWatcher.h>
#include <LibCore/TimeZoneWatcher.h>
#if !defined(AK_OS_LINUX)
static_assert(false, "This file must only be used for Linux");
#endif
namespace Core {
static constexpr auto time_zone_files = Array {
"/etc/localtime"sv,
"/etc/timezone"sv,
"/etc/TZ"sv,
};
static constexpr auto time_zone_mask = FileWatcherEvent::Type::ContentModified
| FileWatcherEvent::Type::Deleted
| FileWatcherEvent::Type::DoNotFollowLink;
class TimeZoneWatcherImpl final : public TimeZoneWatcher {
public:
static ErrorOr<NonnullOwnPtr<TimeZoneWatcherImpl>> create()
{
auto file_watcher = TRY(FileWatcher::create());
for (auto time_zone_file : time_zone_files) {
if (auto result = file_watcher->add_watch(time_zone_file, time_zone_mask); !result.is_error())
break;
}
return adopt_own(*new TimeZoneWatcherImpl(move(file_watcher)));
}
private:
explicit TimeZoneWatcherImpl(NonnullRefPtr<FileWatcher> file_watcher)
: m_file_watcher(move(file_watcher))
{
m_file_watcher->on_change = [this](Core::FileWatcherEvent const& event) {
if (on_time_zone_changed)
on_time_zone_changed();
if (has_flag(event.type, FileWatcherEvent::Type::Deleted))
(void)m_file_watcher->add_watch(event.event_path, time_zone_mask);
};
}
NonnullRefPtr<FileWatcher> m_file_watcher;
};
ErrorOr<NonnullOwnPtr<TimeZoneWatcher>> TimeZoneWatcher::create()
{
return TimeZoneWatcherImpl::create();
}
}