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LibCore: Add support for monitoring symbolic links

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Symbolic links are currently always followed to their target. This lets
us monitor the link file itself.
This commit is contained in:
Timothy Flynn 2024-08-23 14:27:44 -04:00 • committed by Andreas Kling
commit e25681203e
Notes: github-actions[bot] 2024-08-25 07:48:52 +00:00
3 changed files with 54 additions and 0 deletions
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51
Tests/LibCore/TestLibCoreFileWatcher.cpp
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@ -107,3 +107,54 @@ TEST_CASE(contents_changed)
event_loop.exec();
}
TEST_CASE(symbolic_link)
{
auto event_loop = Core::EventLoop();
auto temp_path = MUST(FileSystem::real_path("/tmp"sv));
auto test_file = LexicalPath::join(temp_path, "testfile"sv);
auto test_link1 = LexicalPath::join(temp_path, "testlink1"sv);
auto test_link2 = LexicalPath::join(temp_path, "testlink2"sv);
(void)MUST(Core::File::open(test_link1.string(), Core::File::OpenMode::ReadWrite));
(void)MUST(Core::File::open(test_link2.string(), Core::File::OpenMode::ReadWrite));
MUST(Core::System::symlink(test_link1.string(), test_file.string()));
auto file_watcher = MUST(Core::FileWatcher::create());
MUST(file_watcher->add_watch(test_file.string(), Core::FileWatcherEvent::Type::Deleted | Core::FileWatcherEvent::Type::DoNotFollowLink));
int event_count = 0;
file_watcher->on_change = [&](Core::FileWatcherEvent const& event) {
EXPECT_EQ(event.event_path, test_file.string());
EXPECT(has_flag(event.type, Core::FileWatcherEvent::Type::Deleted));
MUST(file_watcher->add_watch(test_file.string(), Core::FileWatcherEvent::Type::Deleted | Core::FileWatcherEvent::Type::DoNotFollowLink));
if (++event_count == 2) {
MUST(Core::System::unlink(test_file.string()));
MUST(Core::System::unlink(test_link1.string()));
MUST(Core::System::unlink(test_link2.string()));
event_loop.quit(0);
}
};
auto timer1 = Core::Timer::create_single_shot(500, [&] {
MUST(Core::System::unlink(test_file.string()));
MUST(Core::System::symlink(test_link1.string(), test_file.string()));
});
timer1->start();
auto timer2 = Core::Timer::create_single_shot(1000, [&] {
MUST(Core::System::unlink(test_file.string()));
MUST(Core::System::symlink(test_link2.string(), test_file.string()));
});
timer2->start();
auto catchall_timer = Core::Timer::create_single_shot(2000, [&] {
VERIFY_NOT_REACHED();
});
catchall_timer->start();
event_loop.exec();
}