mirror of https://github.com/pbatard/rufus.git
[fat] improve FAT32 boot record setup
* write primary and secondary boot records * add offset provision for sector write * improved detection reports for MBR, FAT16 and FAT32
This commit is contained in:
Pete Batard
parent
36fa9cee23
commit
0600005a09
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@ -71,9 +71,8 @@ int write_fat_32_br(FILE *fp, int bKeepLabel)
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( write_data(fp, 0x0, br_fat32_0x0, sizeof(br_fat32_0x0)) &&
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/* BIOS Parameter Block should not be overwritten */
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write_data(fp, 0x52, br_fat32_0x52, sizeof(br_fat32_0x52)) &&
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/* except offsets 0x40 & 0xC40 which may have to be corrected */
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/* except offset 0x40 which may have to be corrected */
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write_data(fp, 0x40, &offset_x40, 1) &&
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write_data(fp, 0xc40, &offset_x40, 1) &&
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/* Cluster information is not overwritten, however, it would bo OK
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to write 0xff 0xff 0xff 0xff 0xff 0xff 0xff 0xff here. */
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write_data(fp, 0x3f0, br_fat32_0x3f0, sizeof(br_fat32_0x3f0)) );
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@ -83,9 +82,8 @@ int write_fat_32_br(FILE *fp, int bKeepLabel)
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/* BIOS Parameter Block should not be overwritten */
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write_data(fp, 0x47, label_11_char, sizeof(label_11_char)) &&
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write_data(fp, 0x52, br_fat32_0x52, sizeof(br_fat32_0x52)) &&
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/* except offsets 0x40 & 0xC40 which may have to be corrected */
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/* except offset 0x40 which may have to be corrected */
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write_data(fp, 0x40, &offset_x40, 1) &&
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write_data(fp, 0xc40, &offset_x40, 1) &&
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/* Cluster information is not overwritten, however, it would bo OK
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to write 0xff 0xff 0xff 0xff 0xff 0xff 0xff 0xff here. */
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write_data(fp, 0x3f0, br_fat32_0x3f0, sizeof(br_fat32_0x3f0)) );
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@ -71,7 +71,12 @@ int read_sectors(HANDLE hDrive, size_t SectorSize,
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return Size;
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}
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/* Use a bastardized fp that contains a Windows handle and the sector size */
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/*
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* The following calls use a bastardized fp on Windows that contains:
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* fp->_ptr: a Windows handle
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* fp->_bufsiz: the sector size
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* fp->_cnt: a file offset
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*/
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int contains_data(FILE *fp, size_t Position,
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const void *pData, size_t Len)
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{
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@ -79,6 +84,7 @@ int contains_data(FILE *fp, size_t Position,
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HANDLE hDrive = (HANDLE)fp->_ptr;
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size_t SectorSize = (size_t)fp->_bufsiz;
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size_t StartSector, EndSector, NumSectors;
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Position += (size_t)fp->_cnt;
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StartSector = Position/SectorSize;
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EndSector = (Position+Len+SectorSize-1)/SectorSize;
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@ -107,6 +113,7 @@ int write_data(FILE *fp, size_t Position,
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HANDLE hDrive = (HANDLE)fp->_ptr;
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size_t SectorSize = (size_t)fp->_bufsiz;
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size_t StartSector, EndSector, NumSectors;
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Position += (size_t)fp->_cnt;
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StartSector = Position/SectorSize;
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EndSector = (Position+Len+SectorSize-1)/SectorSize;
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108
src/format.c
108
src/format.c
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@ -179,58 +179,69 @@ out:
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static BOOL AnalyzeMBR(HANDLE hPhysicalDrive)
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{
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FILE fake_fd;
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FILE fake_fd = { 0 };
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fake_fd._ptr = (char*)hPhysicalDrive;
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fake_fd._bufsiz = SelectedDrive.Geometry.BytesPerSector;
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// TODO: Apply this detection before partitioning
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if (is_br(&fake_fd)) {
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uprintf("Drive has an x86 boot sector\n");
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} else{
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uprintf("Drive is missing an x86 boot sector!\n");
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if (!is_br(&fake_fd)) {
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uprintf("Drive does not have an x86 master boot record\n");
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return FALSE;
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}
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// TODO: Add/Eliminate FAT12?
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if (is_fat_16_br(&fake_fd) || is_fat_32_br(&fake_fd)) {
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if (entire_fat_16_br_matches(&fake_fd)) {
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uprintf("Exact FAT16 DOS boot record match\n");
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} else if (entire_fat_16_fd_br_matches(&fake_fd)) {
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uprintf("Exact FAT16 FreeDOS boot record match\n");
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} else if (entire_fat_32_br_matches(&fake_fd)) {
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uprintf("Exact FAT32 DOS boot record match\n");
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} else if (entire_fat_32_nt_br_matches(&fake_fd)) {
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uprintf("Exact FAT32 NT boot record match\n");
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} else if (entire_fat_32_fd_br_matches(&fake_fd)) {
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uprintf("Exactly FAT32 FreeDOS boot record match\n");
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} else {
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uprintf("Unknown FAT16 or FAT32 boot record\n");
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}
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} else if (is_dos_mbr(&fake_fd)) {
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uprintf("Microsoft DOS/NT/95A master boot record match\n");
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if (is_dos_mbr(&fake_fd)) {
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uprintf("Drive has a Microsoft DOS/NT/95A master boot record\n");
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} else if (is_dos_f2_mbr(&fake_fd)) {
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uprintf("Microsoft DOS/NT/95A master boot record with the undocumented\n");
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uprintf("F2 instruction match\n");
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uprintf("Drive has a Microsoft DOS/NT/95A master boot record "
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"with the undocumented F2 instruction\n");
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} else if (is_95b_mbr(&fake_fd)) {
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uprintf("Microsoft 95B/98/98SE/ME master boot record match\n");
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uprintf("Drive has a Microsoft 95B/98/98SE/ME master boot record\n");
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} else if (is_2000_mbr(&fake_fd)) {
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uprintf("Microsoft 2000/XP/2003 master boot record match\n");
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uprintf("Drive has a Microsoft 2000/XP/2003 master boot record\n");
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} else if (is_vista_mbr(&fake_fd)) {
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uprintf("Microsoft Vista master boot record match\n");
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uprintf("Drive has a Microsoft Vista master boot record\n");
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} else if (is_win7_mbr(&fake_fd)) {
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uprintf("Microsoft 7 master boot record match\n");
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uprintf("Drive has a Microsoft 7 master boot record\n");
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} else if (is_zero_mbr(&fake_fd)) {
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uprintf("Zeroed non-bootable master boot record match\n");
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uprintf("Drive has a zeroed non-bootable master boot record\n");
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} else {
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uprintf("Unknown boot record\n");
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}
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return TRUE;
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}
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static BOOL AnalyzePBR(HANDLE hLogicalVolume)
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{
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FILE fake_fd = { 0 };
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fake_fd._ptr = (char*)hLogicalVolume;
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fake_fd._bufsiz = SelectedDrive.Geometry.BytesPerSector;
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// TODO: Add/Eliminate FAT12?
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if (!is_br(&fake_fd)) {
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uprintf("Volume does not have an x86 partition boot record\n");
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return FALSE;
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}
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if (is_fat_16_br(&fake_fd) || is_fat_32_br(&fake_fd)) {
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if (entire_fat_16_br_matches(&fake_fd)) {
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uprintf("Drive has a FAT16 DOS partition boot record\n");
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} else if (entire_fat_16_fd_br_matches(&fake_fd)) {
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uprintf("Drive has a FAT16 FreeDOS partition boot record\n");
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} else if (entire_fat_32_br_matches(&fake_fd)) {
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uprintf("Drive has a FAT32 DOS partition boot record\n");
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} else if (entire_fat_32_nt_br_matches(&fake_fd)) {
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uprintf("Drive has a FAT32 NT partition boot record\n");
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} else if (entire_fat_32_fd_br_matches(&fake_fd)) {
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uprintf("Drive has a FAT32 FreeDOS partition boot record\n");
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} else {
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uprintf("Drive has a unknown FAT16 or FAT32 partition boot record\n");
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}
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}
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return TRUE;
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}
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static BOOL ClearMBR(HANDLE hPhysicalDrive)
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{
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FILE fake_fd;
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FILE fake_fd = { 0 };
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fake_fd._ptr = (char*)hPhysicalDrive;
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fake_fd._bufsiz = SelectedDrive.Geometry.BytesPerSector;
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@ -246,7 +257,7 @@ static BOOL WriteMBR(HANDLE hPhysicalDrive)
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unsigned char* buf = NULL;
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size_t SecSize = SelectedDrive.Geometry.BytesPerSector;
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size_t nSecs = (0x200 + SecSize -1) / SecSize;
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FILE fake_fd;
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FILE fake_fd = { 0 };
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if (!AnalyzeMBR(hPhysicalDrive)) return FALSE;
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@ -308,19 +319,35 @@ out:
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*/
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static BOOL WritePBR(HANDLE hLogicalVolume)
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{
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FILE fake_fd;
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int i;
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FILE fake_fd = { 0 };
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fake_fd._ptr = (char*)hLogicalVolume;
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fake_fd._bufsiz = SelectedDrive.Geometry.BytesPerSector;
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switch (ComboBox_GetItemData(hFileSystem, ComboBox_GetCurSel(hFileSystem))) {
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case FS_FAT16:
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if (write_fat_16_br(&fake_fd, 0))
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return TRUE;
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if (!is_fat_16_fs(&fake_fd)) {
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uprintf("New volume does not have a FAT16 boot sector\n");
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break;
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}
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uprintf("Confirmed new volume has a FAT16 boot sector\n");
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if (!write_fat_16_br(&fake_fd, 0))
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break;
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return TRUE;
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case FS_FAT32:
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// TODO: we may have to validate the 0xc40 offset of second FS boot sector
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if (write_fat_32_br(&fake_fd, 0))
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return TRUE;
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for (i=0; i<2; i++) {
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if (!is_fat_32_fs(&fake_fd)) {
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uprintf("New volume does not have a %s FAT32 boot sector\n", i?"secondary":"primary");
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break;
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}
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uprintf("Confirmed new volume has a %s FAT32 boot sector\n", i?"secondary":"primary");
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uprintf("Setting %s FAT32 boot sector for DOS boot...\n", i?"secondary":"primary");
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if (!write_fat_32_br(&fake_fd, 0))
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break;
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fake_fd._cnt += 6 * (int)SelectedDrive.Geometry.BytesPerSector;
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}
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return TRUE;
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default:
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uprintf("unsupported FS for FS BR processing\n");
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break;
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@ -359,6 +386,9 @@ void __cdecl FormatThread(void* param)
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}
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UnmountDrive(hLogicalVolume);
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AnalyzeMBR(hPhysicalDrive);
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AnalyzePBR(hLogicalVolume);
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if (IsChecked(IDC_BADBLOCKS)) {
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do {
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if (!BadBlocks(hPhysicalDrive, SelectedDrive.DiskSize,
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@ -367,7 +397,7 @@ void __cdecl FormatThread(void* param)
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if (!FormatStatus)
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FormatStatus = ERROR_SEVERITY_ERROR|FAC(FACILITY_STORAGE)|
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APPERR(ERROR_BADBLOCKS_FAILURE);
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// TODO: should probably ClearMBR here as well
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ClearMBR(hPhysicalDrive);
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goto out;
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}
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uprintf("Check completed, %u bad block%s found. (%d/%d/%d errors)\n",
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12
src/rufus.rc
12
src/rufus.rc
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@ -30,7 +30,7 @@ LANGUAGE LANG_ENGLISH, SUBLANG_NEUTRAL
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IDD_DIALOG DIALOGEX 12, 12, 206, 278
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STYLE DS_SETFONT | DS_MODALFRAME | DS_FIXEDSYS | WS_POPUP | WS_CAPTION | WS_SYSMENU
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EXSTYLE WS_EX_APPWINDOW
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CAPTION "Rufus v1.0.3.93"
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CAPTION "Rufus v1.0.3.94"
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FONT 8, "MS Shell Dlg", 400, 0, 0x1
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BEGIN
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DEFPUSHBUTTON "Start",IDC_START,94,236,50,14
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@ -64,7 +64,7 @@ BEGIN
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DEFPUSHBUTTON "OK",IDOK,231,175,50,14,WS_GROUP
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CONTROL "<a href=""http://rufus.akeo.ie"">http://rufus.akeo.ie</a>",IDC_ABOUT_RUFUS_URL,
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"SysLink",WS_TABSTOP,46,47,114,9
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LTEXT "Version 1.0.3 (Build 93)",IDC_STATIC,46,19,78,8
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LTEXT "Version 1.0.3 (Build 94)",IDC_STATIC,46,19,78,8
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PUSHBUTTON "License...",IDC_ABOUT_LICENSE,46,175,50,14,WS_GROUP
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EDITTEXT IDC_ABOUT_COPYRIGHTS,46,107,235,63,ES_MULTILINE | ES_READONLY | WS_VSCROLL
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LTEXT "Report bugs or request enhancements at:",IDC_STATIC,46,66,187,8
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@ -163,8 +163,8 @@ END
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//
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VS_VERSION_INFO VERSIONINFO
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FILEVERSION 1,0,3,93
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PRODUCTVERSION 1,0,3,93
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FILEVERSION 1,0,3,94
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PRODUCTVERSION 1,0,3,94
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FILEFLAGSMASK 0x3fL
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#ifdef _DEBUG
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FILEFLAGS 0x1L
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@ -181,13 +181,13 @@ BEGIN
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BEGIN
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VALUE "CompanyName", "akeo.ie"
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VALUE "FileDescription", "Rufus"
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VALUE "FileVersion", "1.0.3.93"
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VALUE "FileVersion", "1.0.3.94"
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VALUE "InternalName", "Rufus"
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VALUE "LegalCopyright", "© 2011 Pete Batard (GPL v3)"
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VALUE "LegalTrademarks", "http://www.gnu.org/copyleft/gpl.html"
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VALUE "OriginalFilename", "rufus.exe"
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VALUE "ProductName", "Rufus"
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VALUE "ProductVersion", "1.0.3.93"
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VALUE "ProductVersion", "1.0.3.94"
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END
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END
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BLOCK "VarFileInfo"
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