reactos/boot/freeldr/freeldr/inifile/ini_init.c

   1 /*
   2  *  FreeLoader
   3  *  Copyright (C) 1998-2003  Brian Palmer  <brianp@sginet.com>
   4  *
   5  *  This program is free software; you can redistribute it and/or modify
   6  *  it under the terms of the GNU General Public License as published by
   7  *  the Free Software Foundation; either version 2 of the License, or
   8  *  (at your option) any later version.
   9  *
  10  *  This program is distributed in the hope that it will be useful,
  11  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  *  GNU General Public License for more details.
  14  *
  15  *  You should have received a copy of the GNU General Public License
  16  *  along with this program; if not, write to the Free Software
  17  *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  18  */
  19
  20 #include <freeldr.h>
  21 #include "ini.h"
  22 #include <fs.h>
  23 #include <rtl.h>
  24 #include <mm.h>
  25 #include <debug.h>
  26
  27
  28 BOOL IniFileInitialize(VOID)
  29 {
  30         PFILE   Freeldr_Ini;    // File handle for freeldr.ini
  31         PUCHAR  FreeLoaderIniFileData;
  32         U32             FreeLoaderIniFileSize;
  33         BOOL    Success;
  34
  35         // Open freeldr.ini
  36         // BootDrive & BootPartition are passed
  37         // in from the boot sector code in the
  38         // DL & DH registers.
  39         Freeldr_Ini = IniOpenIniFile(BootDrive, BootPartition);
  40
  41         // If we couldn't open freeldr.ini on the partition
  42         // they specified in the boot sector then try
  43         // opening the active (boot) partition.
  44         if ((Freeldr_Ini == NULL) && (BootPartition != 0))
  45         {
  46                 BootPartition = 0;
  47
  48                 Freeldr_Ini = IniOpenIniFile(BootDrive, BootPartition);
  49
  50                 return FALSE;
  51         }
  52
  53         if (Freeldr_Ini == NULL)
  54         {
  55                 printf("Error opening freeldr.ini or file not found.\n");
  56                 printf("You need to re-install FreeLoader.\n");
  57                 return FALSE;
  58         }
  59
  60         // Get the file size & allocate enough memory for it
  61         FreeLoaderIniFileSize = FsGetFileSize(Freeldr_Ini);
  62         FreeLoaderIniFileData = MmAllocateMemory(FreeLoaderIniFileSize);
  63
  64         // If we are out of memory then return FALSE
  65         if (FreeLoaderIniFileData == NULL)
  66         {
  67                 printf("Out of memory while loading freeldr.ini.\n");
  68                 FsCloseFile(Freeldr_Ini);
  69                 return FALSE;
  70         }
  71
  72         // Read freeldr.ini off the disk
  73         if (!FsReadFile(Freeldr_Ini, FreeLoaderIniFileSize, NULL, FreeLoaderIniFileData))
  74         {
  75                 FsCloseFile(Freeldr_Ini);
  76                 MmFreeMemory(FreeLoaderIniFileData);
  77                 return FALSE;
  78         }
  79
  80         FsCloseFile(Freeldr_Ini);
  81
  82         // Parse the .ini file data
  83         Success = IniParseFile(FreeLoaderIniFileData, FreeLoaderIniFileSize);
  84
  85         MmFreeMemory(FreeLoaderIniFileData);
  86
  87         return Success;
  88 }
  89
  90 PFILE IniOpenIniFile(U8 BootDriveNumber, U8 BootPartitionNumber)
  91 {
  92         PFILE   IniFileHandle;  // File handle for freeldr.ini
  93
  94         if (!FsOpenVolume(BootDriveNumber, BootPartitionNumber))
  95         {
  96                 if (BootPartitionNumber == 0)
  97                 {
  98                         printf("Error opening active (bootable) partition on boot drive 0x%x for file access.\n", BootDriveNumber);
  99                 }
 100                 else
 101                 {
 102                         printf("Error opening partition %d on boot drive 0x%x for file access.\n", BootPartitionNumber, BootDriveNumber);
 103                 }
 104
 105                 return NULL;
 106         }
 107
 108         // Try to open freeldr.ini
 109         IniFileHandle = FsOpenFile("freeldr.ini");
 110
 111         return IniFileHandle;
 112 }