svn commit: r272715 - head/sys/dev/vt

[Aleksandr Rybalko]

Author: ray
Date: Tue Oct  7 18:47:53 2014
New Revision: 272715
URL: https://svnweb.freebsd.org/changeset/base/272715

Log:
  Allow vt(4) to disable terminal bell with `sysctl kern.vt.bell_enable=0`,
  similar as syscons(4) do.
  
  Submitted by:	Tiwei Bie <btw at mail.ustc.edu.cn>
  MFC after:	2 weeks
  Sponsored by:	The FreeBSD Foundation

Modified:
  head/sys/dev/vt/vt_core.c

Modified: head/sys/dev/vt/vt_core.c
==============================================================================
--- head/sys/dev/vt/vt_core.c	Tue Oct  7 18:22:05 2014	(r272714)
+++ head/sys/dev/vt/vt_core.c	Tue Oct  7 18:47:53 2014	(r272715)
@@ -120,6 +120,7 @@ const struct terminal_class vt_termclass
 
 static SYSCTL_NODE(_kern, OID_AUTO, vt, CTLFLAG_RD, 0, "vt(9) parameters");
 VT_SYSCTL_INT(enable_altgr, 1, "Enable AltGr key (Do not assume R.Alt as Alt)");
+VT_SYSCTL_INT(enable_bell, 1, "Enable bell");
 VT_SYSCTL_INT(debug, 0, "vt(9) debug level");
 VT_SYSCTL_INT(deadtimer, 15, "Time to wait busy process in VT_PROCESS mode");
 VT_SYSCTL_INT(suspendswitch, 1, "Switch to VT0 before suspend");
@@ -904,6 +905,9 @@ vtterm_bell(struct terminal *tm)
 	struct vt_window *vw = tm->tm_softc;
 	struct vt_device *vd = vw->vw_device;
 
+	if (!vt_enable_bell)
+		return;
+
 	if (vd->vd_flags & VDF_QUIET_BELL)
 		return;
 
@@ -915,6 +919,9 @@ vtterm_beep(struct terminal *tm, u_int p
 {
 	u_int freq, period;
 
+	if (!vt_enable_bell)
+		return;
+
 	if ((param == 0) || ((param & 0xffff) == 0)) {
 		vtterm_bell(tm);
 		return;