[BOOTDATA]
[reactos.git] / reactos / boot / freeldr / install / install.c
1 /*
2 * FreeLoader - install.c
3 *
4 * Copyright (C) 2001 Brian Palmer <brianp@sginet.com>
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License along
17 * with this program; if not, write to the Free Software Foundation, Inc.,
18 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
19 */
20
21 #include <windows.h>
22 #include <tchar.h>
23 #include <stdio.h>
24 #include "install.h"
25 #include "volume.h"
26
27 /*
28 * These includes are required to define
29 * the fat_data and fat32_data arrays.
30 */
31 #include "fat.h"
32 #include "fat32.h"
33
34 BOOL BackupBootSector(LPCTSTR lpszVolumeName);
35 BOOL InstallBootSector(LPCTSTR lpszVolumeType);
36
37 int main(int argc, char *argv[])
38 {
39 if (argc < 3)
40 {
41 _tprintf(_T("syntax: install x: [fs_type]\nwhere fs_type is fat or fat32\n"));
42 return -1;
43 }
44
45 if (!OpenVolume(argv[1]))
46 {
47 return -1;
48 }
49
50 BackupBootSector(argv[1]);
51
52 InstallBootSector(argv[2]);
53
54 _tprintf(_T("You must now copy freeldr.sys & freeldr.ini to %s.\n"), argv[1]);
55
56 CloseVolume();
57
58 return 0;
59 }
60
61 BOOL BackupBootSector(LPCTSTR lpszVolumeName)
62 {
63 HANDLE hBackupFile;
64 TCHAR szFileName[MAX_PATH];
65 ULONG Count;
66 BYTE BootSectorBuffer[512];
67 DWORD dwNumberOfBytesWritten;
68 BOOL bRetVal;
69
70 //
71 // Find the next unused filename and open it
72 //
73 for (Count=0; ; Count++)
74 {
75 //
76 // Generate the next filename
77 //
78 _stprintf(szFileName, _T("%s\\bootsect.%03ld"), lpszVolumeName, Count);
79
80 //
81 // Try to create a new file, fail if exists
82 //
83 hBackupFile = CreateFile(szFileName, GENERIC_WRITE, 0, NULL, CREATE_NEW, /*FILE_ATTRIBUTE_SYSTEM*/0, NULL);
84
85 //
86 // Check to see if it worked
87 //
88 if (hBackupFile != INVALID_HANDLE_VALUE)
89 {
90 break;
91 }
92
93 //
94 // Nope, didn't work
95 // Check to see if it already existed
96 //
97 if (!(GetLastError() != ERROR_ALREADY_EXISTS))
98 {
99 _tprintf(_T("%s:%d: "), __FILE__, __LINE__);
100 _tprintf(_T("Boot sector backup failed. Error code %ld.\n"), GetLastError());
101 return FALSE;
102 }
103 }
104
105 //
106 // Try to read the boot sector
107 //
108 if (!ReadVolumeSector(0, BootSectorBuffer))
109 {
110 CloseHandle(hBackupFile);
111 return FALSE;
112 }
113
114 //
115 // Try to write the boot sector data to the file
116 //
117 bRetVal = WriteFile(hBackupFile, BootSectorBuffer, 512, &dwNumberOfBytesWritten, NULL);
118 if (!bRetVal || (dwNumberOfBytesWritten != 512))
119 {
120 CloseHandle(hBackupFile);
121 _tprintf(_T("%s:%d: "), __FILE__, __LINE__);
122 _tprintf(_T("WriteFile() failed. Error code %ld.\n"), GetLastError());
123 return FALSE;
124 }
125
126 _tprintf(_T("Boot sector backed up to file: %s\n"), szFileName);
127
128 CloseHandle(hBackupFile);
129
130 return TRUE;
131 }
132
133 BOOL InstallBootSector(LPCTSTR lpszVolumeType)
134 {
135 BYTE BootSectorBuffer[512];
136
137 //
138 // Read in the old boot sector
139 //
140 if (!ReadVolumeSector(0, BootSectorBuffer))
141 {
142 return FALSE;
143 }
144
145 if (_tcsicmp(lpszVolumeType, _T("fat")) == 0)
146 {
147 //
148 // Update the BPB in the new boot sector
149 //
150 memcpy((fat_data+3), (BootSectorBuffer+3), 59 /*fat BPB length*/);
151
152 //
153 // Write out new boot sector
154 //
155 if (!WriteVolumeSector(0, fat_data))
156 {
157 return FALSE;
158 }
159 }
160 else if (_tcsicmp(lpszVolumeType, _T("fat32")) == 0)
161 {
162 //
163 // Update the BPB in the new boot sector
164 //
165 memcpy((fat32_data+3), (BootSectorBuffer+3), 87 /*fat32 BPB length*/);
166
167 //
168 // Write out new boot sector
169 //
170 if (!WriteVolumeSector(0, fat32_data))
171 {
172 return FALSE;
173 }
174
175 //
176 // Write out new extra sector
177 //
178 if (!WriteVolumeSector(14, (fat32_data+512)))
179 {
180 return FALSE;
181 }
182 }
183 else
184 {
185 _tprintf(_T("%s:%d: "), __FILE__, __LINE__);
186 _tprintf(_T("File system type %s unknown.\n"), lpszVolumeType);
187 return FALSE;
188 }
189
190 _tprintf(_T("%s boot sector installed.\n"), lpszVolumeType);
191
192 return TRUE;
193 }