Line data    Source code

       1             : /*      $OpenBSD: cninit.c,v 1.15 2017/12/30 20:46:59 guenther Exp $    */
       2             : /*      $NetBSD: cninit.c,v 1.2 1995/04/11 22:08:10 pk Exp $    */
       3             : 
       4             : /*
       5             :  * Copyright (c) 1988 University of Utah.
       6             :  * Copyright (c) 1990, 1993
       7             :  *      The Regents of the University of California.  All rights reserved.
       8             :  *
       9             :  * This code is derived from software contributed to Berkeley by
      10             :  * the Systems Programming Group of the University of Utah Computer
      11             :  * Science Department.
      12             :  *
      13             :  * Redistribution and use in source and binary forms, with or without
      14             :  * modification, are permitted provided that the following conditions
      15             :  * are met:
      16             :  * 1. Redistributions of source code must retain the above copyright
      17             :  *    notice, this list of conditions and the following disclaimer.
      18             :  * 2. Redistributions in binary form must reproduce the above copyright
      19             :  *    notice, this list of conditions and the following disclaimer in the
      20             :  *    documentation and/or other materials provided with the distribution.
      21             :  * 3. Neither the name of the University nor the names of its contributors
      22             :  *    may be used to endorse or promote products derived from this software
      23             :  *    without specific prior written permission.
      24             :  *
      25             :  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
      26             :  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
      27             :  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
      28             :  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
      29             :  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
      30             :  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
      31             :  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
      32             :  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
      33             :  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
      34             :  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
      35             :  * SUCH DAMAGE.
      36             :  *
      37             :  * from: Utah $Hdr: cons.c 1.7 92/01/21$
      38             :  *
      39             :  *      @(#)cons.c      8.2 (Berkeley) 1/12/94
      40             :  */
      41             : 
      42             : #include <sys/param.h>
      43             : #include <sys/systm.h>
      44             : #include <sys/ioctl.h>
      45             : #include <sys/tty.h>
      46             : #include <sys/conf.h>
      47             : #include <sys/vnode.h>
      48             : 
      49             : #include <dev/cons.h>
      50             : 
      51             : struct consdev *cn_tab = NULL;
      52             : 
      53             : void
      54           0 : cninit(void)
      55             : {
      56             :         struct consdev *cp;
      57             : 
      58             :         /*
      59             :          * Collect information about all possible consoles
      60             :          * and find the one with highest priority.
      61             :          */
      62           0 :         for (cp = constab; cp->cn_probe; cp++) {
      63           0 :                 (*cp->cn_probe)(cp);
      64           0 :                 if (cp->cn_pri != CN_DEAD &&
      65           0 :                     (cn_tab == NULL || cp->cn_pri > cn_tab->cn_pri))
      66           0 :                         cn_tab = cp;
      67             :         }
      68             : 
      69             :         /*
      70             :          * No console, we can handle it.
      71             :          */
      72           0 :         if ((cp = cn_tab) == NULL)
      73           0 :                 return;
      74             : 
      75             :         /*
      76             :          * Turn on console.
      77             :          */
      78           0 :         (*cp->cn_init)(cp);
      79           0 : }