diff options
Diffstat (limited to 'sys/kern/tty.c')
| -rw-r--r-- | sys/kern/tty.c | 19 |
1 files changed, 18 insertions, 1 deletions
diff --git a/sys/kern/tty.c b/sys/kern/tty.c index a3d8e35..65b9607 100644 --- a/sys/kern/tty.c +++ b/sys/kern/tty.c @@ -1142,7 +1142,11 @@ ttypoll(dev_t dev, int events, struct thread *td) int revents = 0; struct tty *tp; + KASSERT(devsw(dev)->d_flags & D_TTY, + ("ttypoll() called on non D_TTY device (%s)", devtoname(dev))); tp = dev->si_tty; + KASSERT(tp != NULL, + ("ttypoll(): no tty pointer on device (%s)", devtoname(dev))); if (tp == NULL) /* XXX used to return ENXIO, but that means true! */ return ((events & (POLLIN | POLLOUT | POLLRDNORM | POLLWRNORM)) | POLLHUP); @@ -1174,10 +1178,15 @@ static struct filterops ttywrite_filtops = int ttykqfilter(dev_t dev, struct knote *kn) { - struct tty *tp = dev->si_tty; + struct tty *tp; struct klist *klist; int s; + KASSERT(devsw(dev)->d_flags & D_TTY, + ("ttykqfilter() called on non D_TTY device (%s)", devtoname(dev))); + tp = dev->si_tty; + KASSERT(tp != NULL, + ("ttykqfilter(): no tty pointer on device (%s)", devtoname(dev))); switch (kn->kn_filter) { case EVFILT_READ: klist = &tp->t_rsel.si_note; @@ -2722,7 +2731,11 @@ ttyread(dev_t dev, struct uio *uio, int flag) { struct tty *tp; + KASSERT(devsw(dev)->d_flags & D_TTY, + ("ttyread() called on non D_TTY device (%s)", devtoname(dev))); tp = dev->si_tty; + KASSERT(tp != NULL, + ("ttyread(): no tty pointer on device (%s)", devtoname(dev))); if (tp == NULL) return (ENODEV); return ((*linesw[tp->t_line].l_read)(tp, uio, flag)); @@ -2733,7 +2746,11 @@ ttywrite(dev_t dev, struct uio *uio, int flag) { struct tty *tp; + KASSERT(devsw(dev)->d_flags & D_TTY, + ("ttywrite() called on non D_TTY device (%s)", devtoname(dev))); tp = dev->si_tty; + KASSERT(tp != NULL, + ("ttywrite(): no tty pointer on device (%s)", devtoname(dev))); if (tp == NULL) return (ENODEV); return ((*linesw[tp->t_line].l_write)(tp, uio, flag)); |
