old_sid           198 src/main.c         pid_t my_sid, old_sid;
old_sid           205 src/main.c         old_sid = (pid_t) strtol (sid_str, NULL, 0);
old_sid           206 src/main.c         if (old_sid == 0)
old_sid           214 src/main.c         return (old_sid != my_sid);