diff options
Diffstat (limited to 'sys/dev/syscons/syscons.c')
| -rw-r--r-- | sys/dev/syscons/syscons.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/sys/dev/syscons/syscons.c b/sys/dev/syscons/syscons.c index 02c771a..09f35bb 100644 --- a/sys/dev/syscons/syscons.c +++ b/sys/dev/syscons/syscons.c @@ -981,6 +981,13 @@ scioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct thread *td) *(int *)data = scp->index + 1; return 0; + case VT_LOCKSWITCH: /* prevent vty switching */ + if ((*(int *)data) & 0x01) + sc->flags |= SC_SCRN_VTYLOCK; + else + sc->flags &= ~SC_SCRN_VTYLOCK; + return 0; + case KDENABIO: /* allow io operations */ error = suser(td); if (error != 0) @@ -2075,6 +2082,13 @@ sc_switch_scr(sc_softc_t *sc, u_int next_scr) DPRINTF(5, ("sc0: sc_switch_scr() %d ", next_scr + 1)); + /* prevent switch if previously requested */ + if (sc->flags & SC_SCRN_VTYLOCK) { + sc_bell(sc->cur_scp, sc->cur_scp->bell_pitch, + sc->cur_scp->bell_duration); + return EPERM; + } + /* delay switch if the screen is blanked or being updated */ if ((sc->flags & SC_SCRN_BLANKED) || sc->write_in_progress || sc->blink_in_progress || sc->videoio_in_progress) { |
