Assign a tty to each process

kernel/include/process.hpp

@@ -34,6 +34,8 @@ struct process_t {
 
     bool system;
 
+    size_t tty;
+
     size_t physical_cr3;
     size_t paging_size;
 

kernel/src/scheduler.cpp

@@ -213,6 +213,7 @@ scheduler::process_t& scheduler::new_process(){
     process.process.system = false;
     process.process.pid = pid;
     process.state = process_state::NEW;
+    process.process.tty = stdio::get_active_terminal().id;
 
     return process.process;
 }