apps: Add run

This utility lets you run a process detached from the shell, using the magic of the launch server.

apps/CMakeLists.txt

@@ -51,3 +51,4 @@ luna_app(clock.cpp clock)
 target_link_libraries(clock PUBLIC ui)
 luna_app(startui.cpp startui)
 luna_app(launch.cpp launch)
+luna_app(run.cpp run)

apps/run.cpp

@@ -0,0 +1,35 @@
+/**
+ * @file run.cpp
+ * @author apio (cloudapio.eu)
+ * @brief Tiny command-line utility to start a detached program in the current GUI session.
+ *
+ * @copyright Copyright (c) 2024, the Luna authors.
+ *
+ */
+
+#include <os/ArgumentParser.h>
+#include <os/File.h>
+#include <os/LocalClient.h>
+#include <os/ipc/Launcher.h>
+
+Result<int> luna_main(int argc, char** argv)
+{
+    StringView program;
+
+    os::ArgumentParser parser;
+    parser.add_description("Start a detached program in the current GUI session."_sv);
+    parser.add_system_program_info("run"_sv);
+    parser.add_positional_argument(program, "program", true);
+    parser.parse(argc, argv);
+
+    OwnedPtr<os::IPC::Client> launcher_client = TRY(os::IPC::Client::connect("/tmp/launch.sock", false));
+
+    os::println("Requesting to start program '%s'...", program.chars());
+
+    os::Launcher::LaunchDetachedRequest request;
+    SET_IPC_STRING(request.command, program.chars());
+    request.search_in_path = true;
+    launcher_client->send_async(request);
+
+    return 0;
+}