main.c 23 start of shell
               main.c 28 got command 'ls'
               main.c 28 got command 'ls'
               main.c 28 got command '""'
               main.c 28 got command 'vim&'
       &                                                                        
  +----+                                                                        
 COM                                                                            
               main.c 28 got command 'jobs'
      job_update_id.c 27 ID_UPDATE:2
               main.c 28 got command 'jobs'
               main.c 28 got command ''
               main.c 28 got command ''
               main.c 28 got command 'jobs'
     sigint_handler.c 18 got SIGINT
     sigint_handler.c 18 got SIGINT
     sigint_handler.c 18 got SIGINT
     sigint_handler.c 18 got SIGINT
     sigint_handler.c 18 got SIGINT
     sigint_handler.c 18 got SIGINT
     sigint_handler.c 18 got SIGINT
     sigint_handler.c 18 got SIGINT
     sigint_handler.c 18 got SIGINT
     sigint_handler.c 18 got SIGINT
     sigint_handler.c 18 got SIGINT
     sigint_handler.c 18 got SIGINT
     sigint_handler.c 18 got SIGINT
     sigint_handler.c 18 got SIGINT
     sigint_handler.c 18 got SIGINT
     sigint_handler.c 18 got SIGINT
     sigint_handler.c 18 got SIGINT
     sigint_handler.c 18 got SIGINT