tag	line	file	source code
O_NOCTTY	413	fs/open.c	f->f_flags &= ~(O_CREAT | O_EXCL | O_NOCTTY | O_TRUNC);
O_NOCTTY	1167	kernel/chr_drv/tty_io.c	noctty = filp->f_flags & O_NOCTTY;