bsd/kern/sys_pipe.c

1274 	struct pipe *ppipe;
1309 	if ((ppipe = cpipe->pipe_peer) != NULL) {
1311 		ppipe->pipe_state &= ~(PIPE_DRAIN);
1312 		ppipe->pipe_state |= PIPE_EOF;
1314 		pipeselwakeup(ppipe, ppipe);
1315 		wakeup(ppipe);
1318 		        KNOTE(&ppipe->pipe_sel.si_note, 1);
1320 		postpipeevent(ppipe, EV_RCLOSED);
1322 		ppipe->pipe_peer = NULL;
1330 	        if (ppipe != NULL) {
1597 	struct pipe *ppipe, *cpipe = (struct pipe *)(fp->f_fglob->fg_data);
1606 		if ((ppipe = cpipe->pipe_peer)) {
1607 			ppipe->pipe_state |= PIPE_DRAIN;
1608 			ppipe->pipe_state &= ~(PIPE_WANTR | PIPE_WANTW);
1609 			wakeup(ppipe);