permissions: add perms for plugin loading (#10184)

Adds permission management for loading plugins

---------

Co-authored-by: Jan Beich <jbeich@FreeBSD.org>

hyprpm/src/core/HyprlandSocket.cpp

@@ -0,0 +1,85 @@
+#include "HyprlandSocket.hpp"
+#include <pwd.h>
+#include <sys/socket.h>
+#include "../helpers/StringUtils.hpp"
+#include <print>
+#include <sys/un.h>
+#include <unistd.h>
+
+static int getUID() {
+    const auto UID   = getuid();
+    const auto PWUID = getpwuid(UID);
+    return PWUID ? PWUID->pw_uid : UID;
+}
+
+static 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::string NHyprlandSocket::send(const std::string& cmd) {
+    const auto SERVERSOCKET = socket(AF_UNIX, SOCK_STREAM, 0);
+
+    if (SERVERSOCKET < 0) {
+        std::println("{}", failureString("Couldn't open a socket (1)"));
+        return "";
+    }
+
+    const auto HIS = getenv("HYPRLAND_INSTANCE_SIGNATURE");
+
+    if (!HIS) {
+        std::println("{}", failureString("HYPRLAND_INSTANCE_SIGNATURE was not set! (Is Hyprland running?) (3)"));
+        return "";
+    }
+
+    sockaddr_un serverAddress = {0};
+    serverAddress.sun_family  = AF_UNIX;
+
+    std::string socketPath = getRuntimeDir() + "/" + HIS + "/.socket.sock";
+
+    strncpy(serverAddress.sun_path, socketPath.c_str(), sizeof(serverAddress.sun_path) - 1);
+
+    if (connect(SERVERSOCKET, (sockaddr*)&serverAddress, SUN_LEN(&serverAddress)) < 0) {
+        std::println("{}", failureString("Couldn't connect to " + socketPath + ". (4)"));
+        return "";
+    }
+
+    auto sizeWritten = write(SERVERSOCKET, cmd.c_str(), cmd.length());
+
+    if (sizeWritten < 0) {
+        std::println("{}", failureString("Couldn't write (5)"));
+        return "";
+    }
+
+    std::string      reply               = "";
+    constexpr size_t BUFFER_SIZE         = 8192;
+    char             buffer[BUFFER_SIZE] = {0};
+
+    sizeWritten = read(SERVERSOCKET, buffer, BUFFER_SIZE);
+
+    if (sizeWritten < 0) {
+        std::println("{}", failureString("Couldn't read (6)"));
+        return "";
+    }
+
+    reply += std::string(buffer, sizeWritten);
+
+    while (sizeWritten == BUFFER_SIZE) {
+        sizeWritten = read(SERVERSOCKET, buffer, BUFFER_SIZE);
+        if (sizeWritten < 0) {
+            std::println("{}", failureString("Couldn't read (7)"));
+            return "";
+        }
+        reply += std::string(buffer, sizeWritten);
+    }
+
+    close(SERVERSOCKET);
+
+    return reply;
+}