diff options
Diffstat (limited to 'sys/kern/tty_pty.c')
| -rw-r--r-- | sys/kern/tty_pty.c | 23 |
1 files changed, 22 insertions, 1 deletions
diff --git a/sys/kern/tty_pty.c b/sys/kern/tty_pty.c index 97f41437f8d..18c6a058005 100644 --- a/sys/kern/tty_pty.c +++ b/sys/kern/tty_pty.c @@ -1,4 +1,4 @@ -/* $OpenBSD: tty_pty.c,v 1.100 2020/06/15 15:29:40 mpi Exp $ */ +/* $OpenBSD: tty_pty.c,v 1.101 2020/06/22 13:14:32 mpi Exp $ */ /* $NetBSD: tty_pty.c,v 1.33.4.1 1996/06/02 09:08:11 mrg Exp $ */ /* @@ -668,6 +668,16 @@ filt_ptcread(struct knote *kn, long hint) tp = pti->pt_tty; kn->kn_data = 0; + if (kn->kn_sfflags & NOTE_OOB) { + /* If in packet or user control mode, check for data. */ + if (((pti->pt_flags & PF_PKT) && pti->pt_send) || + ((pti->pt_flags & PF_UCNTL) && pti->pt_ucntl)) { + kn->kn_fflags |= NOTE_OOB; + kn->kn_data = 1; + return (1); + } + return (0); + } if (ISSET(tp->t_state, TS_ISOPEN)) { if (!ISSET(tp->t_state, TS_TTSTOP)) kn->kn_data = tp->t_outq.c_cc; @@ -733,6 +743,13 @@ const struct filterops ptcwrite_filtops = { .f_event = filt_ptcwrite, }; +const struct filterops ptcexcept_filtops = { + .f_flags = FILTEROP_ISFD, + .f_attach = NULL, + .f_detach = filt_ptcrdetach, + .f_event = filt_ptcread, +}; + int ptckqfilter(dev_t dev, struct knote *kn) { @@ -749,6 +766,10 @@ ptckqfilter(dev_t dev, struct knote *kn) klist = &pti->pt_selw.si_note; kn->kn_fop = &ptcwrite_filtops; break; + case EVFILT_EXCEPT: + klist = &pti->pt_selr.si_note; + kn->kn_fop = &ptcexcept_filtops; + break; default: return (EINVAL); } |