added a very simple App::guardProcess() function

qse/lib/si/App.cpp

@@ -382,6 +382,27 @@ void App::unsubscribe_from_all_signals_no_mutex()
 	}
 }
 
+int App::guardProcess (const qse_mchar_t* proc_name)
+{
+// TODO: enhance it
+	while (1)
+	{
+		pid_t pid = ::fork();
+		if (pid == -1) return -1;
+		if (pid == 0) break; // child
+
+		int status;
+		while (::waitpid(pid, &status, 0) != pid);
+		if (WIFEXITED(status) && WEXITSTATUS(status) == 0) 
+		{
+			return 0;
+		}
+	}
+
+	// TODO: if (proc_name) qse_set_proc_name (proc_name);
+	return 1; // the caller must execute the actual work.
+}
+
 /////////////////////////////////
 QSE_END_NAMESPACE(QSE)
 /////////////////////////////////

qse/lib/si/os.c

@@ -53,3 +53,10 @@ void qse_sleep (const qse_ntime_t* interval)
 #endif
 }
 
+/*
+ TODO:
+int qse_set_proc_name (const qse_char_t* name)
+{
+	::prctl(PR_SET_NAME, name, 0, 0, 0);
+}*/
+