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Fix the OTIOCGETD emulation. Line discipline 0 is NTTYDISC.

This commit is contained in:
christos 2020-08-08 19:04:58 +00:00
parent 26e41a6045
commit bed7e9544b
1 changed files with 4 additions and 4 deletions
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8
sys/compat/common/tty_43.c
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@ -1,4 +1,4 @@
/* $NetBSD: tty_43.c,v 1.36 2020/05/23 23:42:41 ad Exp $ */
/* $NetBSD: tty_43.c,v 1.37 2020/08/08 19:04:58 christos Exp $ */
/*-
* Copyright (c) 2008 The NetBSD Foundation, Inc.
@ -62,7 +62,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: tty_43.c,v 1.36 2020/05/23 23:42:41 ad Exp $");
__KERNEL_RCSID(0, "$NetBSD: tty_43.c,v 1.37 2020/08/08 19:04:58 christos Exp $");
#if defined(_KERNEL_OPT)
#include "opt_compat_netbsd.h"
@ -250,8 +250,8 @@ compat_43_ttioctl(struct tty *tp, u_long com, void *data, int flag,
case OTIOCGETD:
mutex_spin_enter(&tty_lock);
*(int *)data = (tp->t_linesw == NULL) ?
2 /* XXX old NTTYDISC */ : tp->t_linesw->l_no;
*(int *)data = (tp->t_linesw == NULL || tp->t_linesw->l_no == 0)
? 2 /* XXX old NTTYDISC */ : tp->t_linesw->l_no;
mutex_spin_exit(&tty_lock);
break;