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Hyprland/hyprctl/main.cpp

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C++
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#include <re2/re2.h>
#include <cctype>
#include <netdb.h>
#include <netinet/in.h>
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <sys/socket.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <sys/un.h>
#include <pwd.h>
#include <unistd.h>
#include <ranges>
#include <algorithm>
#include <csignal>
#include <format>
#include <iostream>
#include <string>
#include <print>
#include <fstream>
#include <string>
#include <vector>
#include <filesystem>
#include <cstdarg>
#include <sys/socket.h>
#include <hyprutils/string/String.hpp>
#include <cstring>
using namespace Hyprutils::String;
#include "Strings.hpp"
#define PAD
std::string instanceSignature;
bool quiet = false;
struct SInstanceData {
std::string id;
uint64_t time;
uint64_t pid;
std::string wlSocket;
bool valid = true;
};
void log(const std::string& str) {
if (quiet)
return;
std::println("{}", str);
}
static int getUID() {
const auto UID = getuid();
const auto PWUID = getpwuid(UID);
return PWUID ? PWUID->pw_uid : UID;
}
std::string getRuntimeDir() {
const auto XDG = getenv("XDG_RUNTIME_DIR");
if (!XDG) {
const std::string USERID = std::to_string(getUID());
return "/run/user/" + USERID + "/hypr";
}
return std::string{XDG} + "/hypr";
}
std::vector<SInstanceData> instances() {
std::vector<SInstanceData> result;
try {
if (!std::filesystem::exists(getRuntimeDir()))
return {};
} catch (std::exception& e) { return {}; }
for (const auto& el : std::filesystem::directory_iterator(getRuntimeDir())) {
if (!el.is_directory() || !std::filesystem::exists(el.path().string() + "/hyprland.lock"))
continue;
// read lock
SInstanceData* data = &result.emplace_back();
data->id = el.path().filename().string();
try {
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
std::ifstream ifs(el.path().string() + "/hyprland.lock");
int i = 0;
for (std::string line; std::getline(ifs, line); ++i) {
if (i == 0) {
try {
data->pid = std::stoull(line);
} catch (std::exception& e) { continue; }
} else if (i == 1) {
data->wlSocket = line;
} else
break;
}
ifs.close();
}
std::erase_if(result, [&](const auto& el) { return kill(el.pid, 0) != 0 && errno == ESRCH; });
std::sort(result.begin(), result.end(), [&](const auto& a, const auto& b) { return a.time < b.time; });
return result;
}
static volatile bool sigintReceived = false;
void intHandler(int sig) {
sigintReceived = true;
std::println("[hyprctl] SIGINT received, closing connection");
}
int rollingRead(const int socket) {
sigintReceived = false;
signal(SIGINT, intHandler);
constexpr size_t BUFFER_SIZE = 8192;
std::array<char, BUFFER_SIZE> buffer = {0};
long sizeWritten = 0;
std::println("[hyprctl] reading from socket following up log:");
while (!sigintReceived) {
sizeWritten = read(socket, buffer.data(), BUFFER_SIZE);
if (sizeWritten < 0 && errno != EAGAIN) {
if (errno != EINTR)
std::println("Couldn't read (5): {}: {}", strerror(errno), errno);
close(socket);
return 5;
}
if (sizeWritten == 0)
break;
if (sizeWritten > 0) {
std::println("{}", std::string(buffer.data(), sizeWritten));
buffer.fill('\0');
}
usleep(100000);
}
close(socket);
return 0;
}
int request(std::string arg, int minArgs = 0, bool needRoll = false) {
const auto SERVERSOCKET = socket(AF_UNIX, SOCK_STREAM, 0);
auto t = timeval{.tv_sec = 5, .tv_usec = 0};
setsockopt(SERVERSOCKET, SOL_SOCKET, SO_RCVTIMEO, &t, sizeof(struct timeval));
const auto ARGS = std::count(arg.begin(), arg.end(), ' ');
if (ARGS < minArgs) {
log(std::format("Not enough arguments in '{}', expected at least {}", arg, minArgs));
return -1;
}
if (SERVERSOCKET < 0) {
log("Couldn't open a socket (1)");
return 1;
}
if (instanceSignature.empty()) {
log("HYPRLAND_INSTANCE_SIGNATURE was not set! (Is Hyprland running?)");
return 2;
}
const std::string USERID = std::to_string(getUID());
sockaddr_un serverAddress = {0};
serverAddress.sun_family = AF_UNIX;
std::string socketPath = getRuntimeDir() + "/" + instanceSignature + "/.socket.sock";
strncpy(serverAddress.sun_path, socketPath.c_str(), sizeof(serverAddress.sun_path) - 1);
if (connect(SERVERSOCKET, (sockaddr*)&serverAddress, SUN_LEN(&serverAddress)) < 0) {
log("Couldn't connect to " + socketPath + ". (3)");
return 3;
}
auto sizeWritten = write(SERVERSOCKET, arg.c_str(), arg.length());
if (sizeWritten < 0) {
log("Couldn't write (4)");
return 4;
}
if (needRoll)
return rollingRead(SERVERSOCKET);
std::string reply = "";
char buffer[8192] = {0};
sizeWritten = read(SERVERSOCKET, buffer, 8192);
if (sizeWritten < 0) {
if (errno == EWOULDBLOCK)
log("Hyprland IPC didn't respond in time\n");
log("Couldn't read (5)");
return 5;
}
reply += std::string(buffer, sizeWritten);
while (sizeWritten == 8192) {
sizeWritten = read(SERVERSOCKET, buffer, 8192);
if (sizeWritten < 0) {
log("Couldn't read (5)");
return 5;
}
reply += std::string(buffer, sizeWritten);
}
close(SERVERSOCKET);
log(reply);
return 0;
}
int requestHyprpaper(std::string arg) {
const auto SERVERSOCKET = socket(AF_UNIX, SOCK_STREAM, 0);
if (SERVERSOCKET < 0) {
log("Couldn't open a socket (1)");
return 1;
}
if (instanceSignature.empty()) {
log("HYPRLAND_INSTANCE_SIGNATURE was not set! (Is Hyprland running?)");
return 2;
}
sockaddr_un serverAddress = {0};
serverAddress.sun_family = AF_UNIX;
const std::string USERID = std::to_string(getUID());
std::string socketPath = getRuntimeDir() + "/" + instanceSignature + "/.hyprpaper.sock";
strncpy(serverAddress.sun_path, socketPath.c_str(), sizeof(serverAddress.sun_path) - 1);
if (connect(SERVERSOCKET, (sockaddr*)&serverAddress, SUN_LEN(&serverAddress)) < 0) {
log("Couldn't connect to " + socketPath + ". (3)");
return 3;
}
arg = arg.substr(arg.find_first_of('/') + 1); // strip flags
arg = arg.substr(arg.find_first_of(' ') + 1); // strip "hyprpaper"
auto sizeWritten = write(SERVERSOCKET, arg.c_str(), arg.length());
if (sizeWritten < 0) {
log("Couldn't write (4)");
return 4;
}
char buffer[8192] = {0};
sizeWritten = read(SERVERSOCKET, buffer, 8192);
if (sizeWritten < 0) {
log("Couldn't read (5)");
return 5;
}
close(SERVERSOCKET);
log(std::string(buffer));
return 0;
}
void batchRequest(std::string arg, bool json) {
std::string commands = arg.substr(arg.find_first_of(' ') + 1);
if (json) {
RE2::GlobalReplace(&commands, ";\\s*", ";j/");
commands.insert(0, "j/");
}
std::string rq = "[[BATCH]]" + commands;
request(rq);
}
void instancesRequest(bool json) {
std::string result = "";
// gather instance data
std::vector<SInstanceData> inst = instances();
if (!json) {
for (auto const& el : inst) {
result += std::format("instance {}:\n\ttime: {}\n\tpid: {}\n\twl socket: {}\n\n", el.id, el.time, el.pid, el.wlSocket);
}
} else {
result += '[';
for (auto const& el : inst) {
result += std::format(R"#(
{{
"instance": "{}",
"time": {},
"pid": {},
"wl_socket": "{}"
}},)#",
el.id, el.time, el.pid, el.wlSocket);
}
result.pop_back();
result += "\n]";
}
log(result + "\n");
}
std::vector<std::string> splitArgs(int argc, char** argv) {
std::vector<std::string> result;
for (auto i = 1 /* skip the executable */; i < argc; ++i)
result.emplace_back(argv[i]);
return result;
}
int main(int argc, char** argv) {
bool parseArgs = true;
if (argc < 2) {
std::println("{}", USAGE);
return 1;
}
std::string fullRequest = "";
std::string fullArgs = "";
const auto ARGS = splitArgs(argc, argv);
bool json = false;
bool needRoll = false;
std::string overrideInstance = "";
for (std::size_t i = 0; i < ARGS.size(); ++i) {
if (ARGS[i] == "--") {
// Stop parsing arguments after --
parseArgs = false;
continue;
}
if (parseArgs && (ARGS[i][0] == '-') && !isNumber(ARGS[i], true) /* For stuff like -2 */) {
// parse
if (ARGS[i] == "-j" && !fullArgs.contains("j")) {
fullArgs += "j";
json = true;
} else if (ARGS[i] == "-r" && !fullArgs.contains("r")) {
fullArgs += "r";
} else if (ARGS[i] == "-a" && !fullArgs.contains("a")) {
fullArgs += "a";
} else if ((ARGS[i] == "-c" || ARGS[i] == "--config") && !fullArgs.contains("c")) {
fullArgs += "c";
} else if ((ARGS[i] == "-f" || ARGS[i] == "--follow") && !fullArgs.contains("f")) {
fullArgs += "f";
needRoll = true;
} else if (ARGS[i] == "--batch") {
fullRequest = "--batch ";
} else if (ARGS[i] == "--instance" || ARGS[i] == "-i") {
++i;
if (i >= ARGS.size()) {
std::println("{}", USAGE);
return 1;
}
overrideInstance = ARGS[i];
} else if (ARGS[i] == "-q" || ARGS[i] == "--quiet") {
quiet = true;
} else if (ARGS[i] == "--help") {
const std::string& cmd = ARGS[0];
if (cmd == "hyprpaper") {
std::println("{}", HYPRPAPER_HELP);
} else if (cmd == "notify") {
std::println("{}", NOTIFY_HELP);
} else if (cmd == "output") {
std::println("{}", OUTPUT_HELP);
} else if (cmd == "plugin") {
std::println("{}", PLUGIN_HELP);
} else if (cmd == "setprop") {
std::println("{}", SETPROP_HELP);
} else if (cmd == "switchxkblayout") {
std::println("{}", SWITCHXKBLAYOUT_HELP);
} else {
std::println("{}", USAGE);
}
return 1;
} else {
std::println("{}", USAGE);
return 1;
}
continue;
}
fullRequest += ARGS[i] + " ";
}
if (fullRequest.empty()) {
std::println("{}", USAGE);
return 1;
}
fullRequest.pop_back(); // remove trailing space
fullRequest = fullArgs + "/" + fullRequest;
// instances is HIS-independent
if (fullRequest.contains("/instances")) {
instancesRequest(json);
return 0;
}
if (needRoll && !fullRequest.contains("/rollinglog")) {
log("only 'rollinglog' command supports '--follow' option");
return 1;
}
if (overrideInstance.contains("_"))
instanceSignature = overrideInstance;
else if (!overrideInstance.empty()) {
if (!isNumber(overrideInstance, false)) {
log("instance invalid\n");
return 1;
}
const auto INSTANCENO = std::stoi(overrideInstance);
const auto INSTANCES = instances();
if (INSTANCENO < 0 || static_cast<std::size_t>(INSTANCENO) >= INSTANCES.size()) {
log("no such instance\n");
return 1;
}
instanceSignature = INSTANCES[INSTANCENO].id;
} else {
const auto ISIG = getenv("HYPRLAND_INSTANCE_SIGNATURE");
if (!ISIG) {
log("HYPRLAND_INSTANCE_SIGNATURE not set! (is hyprland running?)\n");
return 1;
}
instanceSignature = ISIG;
}
int exitStatus = 0;
if (fullRequest.contains("/--batch"))
batchRequest(fullRequest, json);
else if (fullRequest.contains("/hyprpaper"))
exitStatus = requestHyprpaper(fullRequest);
else if (fullRequest.contains("/switchxkblayout"))
exitStatus = request(fullRequest, 2);
else if (fullRequest.contains("/seterror"))
exitStatus = request(fullRequest, 1);
else if (fullRequest.contains("/setprop"))
exitStatus = request(fullRequest, 3);
else if (fullRequest.contains("/plugin"))
exitStatus = request(fullRequest, 1);
else if (fullRequest.contains("/dismissnotify"))
exitStatus = request(fullRequest, 0);
else if (fullRequest.contains("/notify"))
exitStatus = request(fullRequest, 2);
else if (fullRequest.contains("/output"))
exitStatus = request(fullRequest, 2);
else if (fullRequest.contains("/setcursor"))
exitStatus = request(fullRequest, 1);
else if (fullRequest.contains("/dispatch"))
exitStatus = request(fullRequest, 1);
else if (fullRequest.contains("/keyword"))
exitStatus = request(fullRequest, 2);
else if (fullRequest.contains("/decorations"))
exitStatus = request(fullRequest, 1);
else if (fullRequest.contains("/--help"))
std::println("{}", USAGE);
else if (fullRequest.contains("/rollinglog") && needRoll)
exitStatus = request(fullRequest, 0, true);
else {
exitStatus = request(fullRequest);
}
std::cout << std::flush;
return exitStatus;
}
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