trigger.c: In function 'do_creator':
trigger.c:89:17: warning: unused variable 'n' [-Wunused-variable]
  int i = 0, fd, n;
                 ^
trigger.c:86:7: warning: unused variable 'buf' [-Wunused-variable]
  char buf[sizeof(payload)];
       ^~~
build OK: usage: ./trigger renamer|creator <dir> <sec>