diff options
| -rw-r--r-- | common/terminal.c | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/common/terminal.c b/common/terminal.c index aa9797e..e397357 100644 --- a/common/terminal.c +++ b/common/terminal.c @@ -138,6 +138,31 @@ int terminal_current_vt(int fd) { log_errorf("could not retrieve VT state: %s", strerror(errno)); return -1; } + + // The FreeBSD VT_GETACTIVE is implemented in the kernel as follows: + // + // static int + // vtterm_ioctl(struct terminal *tm, u_long cmd, caddr_t data, + // struct thread *td) + // { + // struct vt_window *vw = tm->tm_softc; + // struct vt_device *vd = vw->vw_device; + // ... + // switch (cmd) { + // ... + // case VT_GETACTIVE: + // *(int *)data = vd->vd_curwindow->vw_number + 1; + // return (0); + // ... + // } + // ... + // } + // + // The side-effect here being that the returned VT number is one + // greater than the internal VT number, which is what is used for e.g. + // numbering the associated VT. To simplify things, we subtract one + // from the returned VT number before returning it. + if (vt < 1) { log_errorf("invalid vt: %d", vt); return -1; |