FMODE_TRUNC      3709 io.c           	fmode |= FMODE_WRITABLE | FMODE_TRUNC | FMODE_CREATE;
FMODE_TRUNC      3765 io.c           	fmode |= FMODE_TRUNC;
FMODE_TRUNC      3799 io.c               if (fmode & FMODE_TRUNC) {