svn commit: r267626 - head/sys/dev/vt

[Steven Hartland]

As per man 9 sysctl negative logic should be avoided so we should
use enable instead ot disable here:
kern.vt.enable with a default of 1

With the user setting kern.vt.enable=0 to disable.

    Regards
    Steve

----- Original Message ----- 
From: "Aleksandr Rybalko" <ray at FreeBSD.org>
To: <src-committers at freebsd.org>; <svn-src-all at freebsd.org>; <svn-src-head at freebsd.org>
Sent: Wednesday, June 18, 2014 11:30 PM
Subject: svn commit: r267626 - head/sys/dev/vt


> Author: ray
> Date: Wed Jun 18 22:30:22 2014
> New Revision: 267626
> URL: http://svnweb.freebsd.org/changeset/base/267626
> 
> Log:
>  Suspend vt(4) initialization if "kern.vt.disable" kenv is set.
>  
>  MFC after: 1 week
>  Sponsored by: The FreeBSD Foundation
> 
> Modified:
>  head/sys/dev/vt/vt_consolectl.c
>  head/sys/dev/vt/vt_core.c
>  head/sys/dev/vt/vt_sysmouse.c
> 
> Modified: head/sys/dev/vt/vt_consolectl.c
> ==============================================================================
> --- head/sys/dev/vt/vt_consolectl.c Wed Jun 18 22:23:10 2014 (r267625)
> +++ head/sys/dev/vt/vt_consolectl.c Wed Jun 18 22:30:22 2014 (r267626)
> @@ -73,6 +73,8 @@ static void
> consolectl_drvinit(void *unused)
> {
> 
> + if (getenv("kern.vt.disable"))
> + return;
>  make_dev(&consolectl_cdevsw, 0, UID_ROOT, GID_WHEEL, 0600,
>      "consolectl");
> }
> 
> Modified: head/sys/dev/vt/vt_core.c
> ==============================================================================
> --- head/sys/dev/vt/vt_core.c Wed Jun 18 22:23:10 2014 (r267625)
> +++ head/sys/dev/vt/vt_core.c Wed Jun 18 22:30:22 2014 (r267626)
> @@ -215,6 +215,8 @@ static void
> vt_update_static(void *dummy)
> {
> 
> + if (getenv("kern.vt.disable"))
> + return;
>  if (main_vd->vd_driver != NULL)
>  printf("VT: running with driver \"%s\".\n",
>      main_vd->vd_driver->vd_name);
> @@ -957,6 +959,9 @@ vtterm_cnprobe(struct terminal *tm, stru
>  struct vt_device *vd = vw->vw_device;
>  struct winsize wsz;
> 
> + if (getenv("kern.vt.disable"))
> + return;
> +
>  if (vd->vd_flags & VDF_INITIALIZED)
>  /* Initialization already done. */
>  return;
> @@ -1991,6 +1996,9 @@ vt_upgrade(struct vt_device *vd)
>  struct vt_window *vw;
>  unsigned int i;
> 
> + if (getenv("kern.vt.disable"))
> + return;
> +
>  for (i = 0; i < VT_MAXWINDOWS; i++) {
>  vw = vd->vd_windows[i];
>  if (vw == NULL) {
> @@ -2056,6 +2064,9 @@ vt_allocate(struct vt_driver *drv, void 
>  struct vt_device *vd;
>  struct winsize wsz;
> 
> + if (getenv("kern.vt.disable"))
> + return;
> +
>  if (main_vd->vd_driver == NULL) {
>  main_vd->vd_driver = drv;
>  printf("VT: initialize with new VT driver \"%s\".\n",
> 
> Modified: head/sys/dev/vt/vt_sysmouse.c
> ==============================================================================
> --- head/sys/dev/vt/vt_sysmouse.c Wed Jun 18 22:23:10 2014 (r267625)
> +++ head/sys/dev/vt/vt_sysmouse.c Wed Jun 18 22:30:22 2014 (r267626)
> @@ -405,6 +405,8 @@ static void
> sysmouse_drvinit(void *unused)
> {
> 
> + if (getenv("kern.vt.disable"))
> + return;
>  mtx_init(&sysmouse_lock, "sysmouse", NULL, MTX_DEF);
>  cv_init(&sysmouse_sleep, "sysmrd");
>  make_dev(&sysmouse_cdevsw, 0, UID_ROOT, GID_WHEEL, 0600,
> 
>