last_wd_fd 500 src/main.c const int last_wd_fd = last_wd_fd 502 src/main.c if (last_wd_fd != -1) last_wd_fd 504 src/main.c MC_UNUSED const ssize_t ret1 = write (last_wd_fd, last_wd_str, strlen (last_wd_str)); last_wd_fd 505 src/main.c MC_UNUSED const int ret2 = close (last_wd_fd);