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compositor: more fs safety around tmp directories

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HIS now includes a random bit, and hyprland will bail if /tmp/hypr is not a directory or if /tmp/hypr/his exists
This commit is contained in:
Vaxry 2024-04-28 20:06:40 +01:00
parent b164e67d8b
commit f7815dab42
2 changed files with 20 additions and 3 deletions
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2
hyprctl/main.cpp
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@ -51,7 +51,7 @@ std::vector<SInstanceData> instances() {
data->id = data->id.substr(data->id.find_last_of('/') + 1, data->id.find(".lock") - data->id.find_last_of('/') - 1);
try {
data->time = std::stoull(data->id.substr(data->id.find_first_of('_') + 1));
data->time = std::stoull(data->id.substr(data->id.find_first_of('_') + 1, data->id.find_last_of('_') - (data->id.find_first_of('_') + 1)));
} catch (std::exception& e) { continue; }
// read file

21
src/Compositor.cpp
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@ -62,15 +62,32 @@ void handleUserSignal(int sig) {
CCompositor::CCompositor() {
m_iHyprlandPID = getpid();
m_szInstanceSignature = GIT_COMMIT_HASH + std::string("_") + std::to_string(time(NULL));
std::random_device dev;
std::mt19937 engine(dev());
std::uniform_int_distribution<> distribution(0, INT32_MAX);
m_szInstanceSignature = GIT_COMMIT_HASH + std::string("_") + std::to_string(time(NULL)) + "_" + std::to_string(distribution(engine));
setenv("HYPRLAND_INSTANCE_SIGNATURE", m_szInstanceSignature.c_str(), true);
if (!std::filesystem::exists("/tmp/hypr"))
mkdir("/tmp/hypr", S_IRWXU | S_IRWXG | S_IRWXO | S_ISVTX);
else if (!std::filesystem::is_directory("/tmp/hypr")) {
std::cout << "Bailing out, /tmp/hypr is not a directory\n";
return;
}
const auto INSTANCEPATH = "/tmp/hypr/" + m_szInstanceSignature;
mkdir(INSTANCEPATH.c_str(), S_IRWXU | S_IRWXG);
if (std::filesystem::exists(INSTANCEPATH)) {
std::cout << "Bailing out, /tmp/hypr/$HIS exists??\n";
return;
}
if (mkdir(INSTANCEPATH.c_str(), S_IRWXU) < 0) {
std::cout << "Bailing out, couldn't create /tmp/hypr/$HIS\n";
return;
}
Debug::init(m_szInstanceSignature);