aaru-dps/Aaru.Server
1
0
Fork 0
mirror of https://github.com/aaru-dps/Aaru.Server.git synced 2025-12-16 19:24:27 +00:00
Code Issues Packages Projects Releases Wiki Activity

Several copy/paste typos prevented MBR on optical discs to

Browse Source 
work, corrected, also add partition at start of track in them
	if it appears as one entry.
This commit is contained in:
Natalia Portillo
2017-07-25 15:03:14 +01:00
parent 3839a7497a
commit 08aca746ef
1 changed files with 29 additions and 16 deletions
Download Patch File Download Diff File Expand all files Collapse all files

45
DiscImageChef.Partitions/MBR.cs
View File

@@ -78,6 +78,7 @@ namespace DiscImageChef.PartPlugins
DiskManagerMasterBootRecord mbr_ontrack = (DiskManagerMasterBootRecord)Marshal.PtrToStructure(handle.AddrOfPinnedObject(), typeof(DiskManagerMasterBootRecord));
handle.Free();
DicConsole.DebugWriteLine("MBR plugin", "xmlmedia = {0}", imagePlugin.ImageInfo.xmlMediaType);
DicConsole.DebugWriteLine("MBR plugin", "mbr.magic = {0:X4}", mbr.magic);
if(mbr.magic != MBR_Magic)
@@ -131,6 +132,9 @@ namespace DiscImageChef.PartPlugins
lba_start /= divider;
lba_sectors /= divider;
if(minix && lba_start == sectorOffset)
minix = false;
if(lba_start > imagePlugin.GetSectors())
{
valid = false;
@@ -154,6 +158,9 @@ namespace DiscImageChef.PartPlugins
DicConsole.DebugWriteLine("MBR plugin", "entry.minix = {0}", minix);
DicConsole.DebugWriteLine("MBR plugin", "lba_start {0}", lba_start);
DicConsole.DebugWriteLine("MBR plugin", "lba_sectors {0}", lba_sectors);
if(valid && minix) // Let's mix the fun
{
if(GetMinix(imagePlugin, lba_start, divider, sectorOffset, sectorSize, out List<Partition> mnx_parts))
@@ -165,10 +172,10 @@ namespace DiscImageChef.PartPlugins
if(valid && !minix)
{
CommonTypes.Partition part = new CommonTypes.Partition();
if(lba_start > 0 && lba_sectors > 0)
if((lba_start > 0 || imagePlugin.ImageInfo.xmlMediaType == XmlMediaType.OpticalDisc) && lba_sectors > 0)
{
part.Start = entry.lba_start + sectorOffset;
part.Length = entry.lba_sectors;
part.Start = lba_start + sectorOffset;
part.Length = lba_sectors;
part.Offset = part.Start * sectorSize;
part.Size = part.Length * sectorSize;
}
@@ -246,8 +253,11 @@ namespace DiscImageChef.PartPlugins
ext_minix |= (ebr_entry.type == 0x81 || ebr_entry.type == 0x80);
// For optical media
lba_start /= divider;
lba_sectors /= divider;
ext_start /= divider;
ext_sectors /= divider;
DicConsole.DebugWriteLine("MBR plugin", "ext_start {0}", ext_start);
DicConsole.DebugWriteLine("MBR plugin", "ext_sectors {0}", ext_sectors);
if(ebr_entry.type == 0x05 || ebr_entry.type == 0x0F || ebr_entry.type == 0x15 || ebr_entry.type == 0x1F || ebr_entry.type == 0x85 ||
ebr_entry.type == 0x91 || ebr_entry.type == 0x9B || ebr_entry.type == 0xC5 || ebr_entry.type == 0xCF || ebr_entry.type == 0xD5)
@@ -310,11 +320,11 @@ namespace DiscImageChef.PartPlugins
return partitions.Count != 0;
}
static bool GetMinix(ImagePlugin imagePlugin, ulong mnx_start, ulong divider, ulong sectorOffset, uint sectorSize, out List<Partition> partitions)
static bool GetMinix(ImagePlugin imagePlugin, ulong start, ulong divider, ulong sectorOffset, uint sectorSize, out List<Partition> partitions)
{
partitions = new List<Partition>();
byte[] sector = imagePlugin.ReadSector(mnx_start);
byte[] sector = imagePlugin.ReadSector(start);
GCHandle handle = GCHandle.Alloc(sector, GCHandleType.Pinned);
ExtendedBootRecord mnx = (ExtendedBootRecord)Marshal.PtrToStructure(handle.AddrOfPinnedObject(), typeof(ExtendedBootRecord));
@@ -334,8 +344,8 @@ namespace DiscImageChef.PartPlugins
ushort start_cylinder = (ushort)(((mnx_entry.start_sector & 0xC0) << 2) | mnx_entry.start_cylinder);
byte end_sector = (byte)(mnx_entry.end_sector & 0x3F);
ushort end_cylinder = (ushort)(((mnx_entry.end_sector & 0xC0) << 2) | mnx_entry.end_cylinder);
ulong ext_start = mnx_entry.lba_start;
ulong ext_sectors = mnx_entry.lba_sectors;
ulong mnx_start = mnx_entry.lba_start;
ulong mnx_sectors = mnx_entry.lba_sectors;
DicConsole.DebugWriteLine("MBR plugin", "mnx_entry.status {0}", mnx_entry.status);
DicConsole.DebugWriteLine("MBR plugin", "mnx_entry.type {0}", mnx_entry.type);
@@ -354,21 +364,24 @@ namespace DiscImageChef.PartPlugins
mnx_entry.start_sector != 0 || mnx_entry.end_cylinder != 0 || mnx_entry.end_head != 0 || mnx_entry.end_sector != 0;
if(mnx_entry.lba_start == 0 && mnx_entry.lba_sectors == 0 && mnx_valid)
{
ext_start = CHStoLBA(start_cylinder, mnx_entry.start_head, start_sector);
ext_sectors = CHStoLBA(end_cylinder, mnx_entry.end_head, mnx_entry.end_sector) - ext_start;
mnx_start = CHStoLBA(start_cylinder, mnx_entry.start_head, start_sector);
mnx_sectors = CHStoLBA(end_cylinder, mnx_entry.end_head, mnx_entry.end_sector) - mnx_start;
}
// For optical media
ext_start /= divider;
ext_sectors /= divider;
mnx_start /= divider;
mnx_sectors /= divider;
DicConsole.DebugWriteLine("MBR plugin", "mnx_start {0}", mnx_start);
DicConsole.DebugWriteLine("MBR plugin", "mnx_sectors {0}", mnx_sectors);
if(mnx_valid)
{
CommonTypes.Partition part = new CommonTypes.Partition();
if(ext_start > 0 && ext_sectors > 0)
if(mnx_start > 0 && mnx_sectors > 0)
{
part.Start = ext_start + sectorOffset;
part.Length = ext_sectors;
part.Start = mnx_start + sectorOffset;
part.Length = mnx_sectors;
part.Offset = part.Start * sectorSize;
part.Size = part.Length * sectorSize;
}