board/MAI/bios_emulator/scitech/src/pm/tests/restore.c

   1 /****************************************************************************
   2 *
   3 *                   SciTech OS Portability Manager Library
   4 *
   5 *  ========================================================================
   6 *
   7 *    The contents of this file are subject to the SciTech MGL Public
   8 *    License Version 1.0 (the "License"); you may not use this file
   9 *    except in compliance with the License. You may obtain a copy of
  10 *    the License at http://www.scitechsoft.com/mgl-license.txt
  11 *
  12 *    Software distributed under the License is distributed on an
  13 *    "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
  14 *    implied. See the License for the specific language governing
  15 *    rights and limitations under the License.
  16 *
  17 *    The Original Code is Copyright (C) 1991-1998 SciTech Software, Inc.
  18 *
  19 *    The Initial Developer of the Original Code is SciTech Software, Inc.
  20 *    All Rights Reserved.
  21 *
  22 *  ========================================================================
  23 *
  24 * Language:     ANSI C
  25 * Environment:  Linux/QNX
  26 *
  27 * Description:  Program to restore the console state state from a previously
  28 *               saved state if the program crashed while the console
  29 *               was in graphics mode.
  30 *
  31 ****************************************************************************/
  32
  33 #include <stdlib.h>
  34 #include <stdio.h>
  35 #include "pmapi.h"
  36
  37 void setVideoMode(int mode)
  38 {
  39     RMREGS r;
  40
  41     r.x.ax = mode;
  42     PM_int86(0x10, &r, &r);
  43 }
  44
  45 int main(void)
  46 {
  47     PM_HWND hwndConsole;
  48     ulong   stateSize;
  49     void    *stateBuf;
  50     FILE    *f;
  51
  52     /* Write the saved console state buffer to disk */
  53     if ((f = fopen("/etc/pmsave.dat","rb")) == NULL) {
  54         printf("Unable to open /etc/pmsave.dat for reading!\n");
  55         return -1;
  56         }
  57     fread(&stateSize,1,sizeof(stateSize),f);
  58     if (stateSize != PM_getConsoleStateSize()) {
  59         printf("Size mismatch in /etc/pmsave.dat!\n");
  60         return -1;
  61         }
  62     if ((stateBuf = PM_malloc(stateSize)) == NULL) {
  63         printf("Unable to allocate console state buffer!\n");
  64         return -1;
  65         }
  66     fread(stateBuf,1,stateSize,f);
  67     fclose(f);
  68
  69     /* Open the console */
  70     hwndConsole = PM_openConsole(0,0,0,0,0,true);
  71
  72     /* Forcibly set 80x25 text mode using the BIOS */
  73     setVideoMode(0x3);
  74
  75     /* Restore the previous console state */
  76     PM_restoreConsoleState(stateBuf,0);
  77     PM_closeConsole(hwndConsole);
  78     PM_free(stateBuf);
  79     printf("Console state successfully restored from /etc/pmsave.dat\n");
  80     return 0;
  81 }