board/MAI/bios_emulator/scitech/src/v86bios/console.c

   1 /*
   2  * Copyright 1999 Egbert Eich
   3  *
   4  * Permission to use, copy, modify, distribute, and sell this software and its
   5  * documentation for any purpose is hereby granted without fee, provided that
   6  * the above copyright notice appear in all copies and that both that
   7  * copyright notice and this permission notice appear in supporting
   8  * documentation, and that the name of the authors not be used in
   9  * advertising or publicity pertaining to distribution of the software without
  10  * specific, written prior permission.  The authors makes no representations
  11  * about the suitability of this software for any purpose.  It is provided
  12  * "as is" without express or implied warranty.
  13  *
  14  * THE AUTHORS DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
  15  * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
  16  * EVENT SHALL THE AUTHORS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
  17  * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
  18  * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
  19  * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
  20  * PERFORMANCE OF THIS SOFTWARE.
  21  */
  22 #include <sys/ioctl.h>
  23 #include <sys/vt.h>
  24 #include <sys/kd.h>
  25 #include <stdio.h>
  26 #include <fcntl.h>
  27 #include <unistd.h>
  28 #include "debug.h"
  29 #include "v86bios.h"
  30
  31 console
  32 open_console(void)
  33 {
  34     int fd;
  35     int VTno;
  36     char VTname[11];
  37     console Con = {-1,-1};
  38     struct vt_stat vts;
  39
  40     if (NO_CONSOLE)
  41             return Con;
  42
  43     if ((fd = open("/dev/tty0",O_WRONLY,0)) < 0)
  44         return Con;
  45
  46     if ((ioctl(fd, VT_OPENQRY, &VTno) < 0) || (VTno == -1)) {
  47         fprintf(stderr,"cannot get a vt\n");
  48         return Con;
  49     }
  50
  51     close(fd);
  52     sprintf(VTname,"/dev/tty%i",VTno);
  53
  54     if ((fd = open(VTname, O_RDWR|O_NDELAY, 0)) < 0) {
  55         fprintf(stderr,"cannot open console\n");
  56         return Con;
  57     }
  58
  59     if (ioctl(fd, VT_GETSTATE, &vts) == 0)
  60         Con.vt = vts.v_active;
  61
  62     if (ioctl(fd, VT_ACTIVATE, VTno) != 0) {
  63         fprintf(stderr,"cannot activate console\n");
  64         close(fd);
  65         return Con;
  66     }
  67     if (ioctl(fd, VT_WAITACTIVE, VTno) != 0) {
  68         fprintf(stderr,"wait for active console failed\n");
  69         close(fd);
  70         return Con;
  71     }
  72 #if 0
  73     if (ioctl(fd, KDSETMODE, KD_GRAPHICS) < 0) {
  74         close(fd);
  75         return Con;
  76     }
  77 #endif
  78     Con.fd = fd;
  79     return Con;
  80 }
  81
  82 void
  83 close_console(console Con)
  84 {
  85     if (Con.fd == -1)
  86         return;
  87
  88 #if 0
  89     ioctl(Con.fd, KDSETMODE, KD_TEXT);
  90 #endif
  91     if (Con.vt >=0)
  92         ioctl(Con.fd, VT_ACTIVATE, Con.vt);
  93
  94     close(Con.fd);
  95 }