LOCK_UN          4523 file.c         # ifndef LOCK_UN
LOCK_UN          6086 file.c             rb_define_const(rb_mFConst, "LOCK_UN", INT2FIX(LOCK_UN));
LOCK_UN            19 missing/flock.c # ifndef LOCK_UN
LOCK_UN            39 missing/flock.c     case LOCK_UN:
LOCK_UN            88 missing/flock.c # ifndef LOCK_UN
LOCK_UN           114 missing/flock.c       case LOCK_UN:
LOCK_UN           369 win32/win32.c        case LOCK_UN:		/* unlock lock */
LOCK_UN           370 win32/win32.c        case LOCK_UN|LOCK_NB:	/* unlock is always non-blocking, I hope */