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Detect older version of the XENIX superblock (found in Lisa

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XENIX).
This commit is contained in:
Natalia Portillo
2016-08-01 00:02:14 +01:00
parent 258e32d733
commit 0e7414b976
2 changed files with 79 additions and 24 deletions
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5
DiscImageChef.Filesystems/ChangeLog
View File

@@ -1,3 +1,8 @@
2016-08-01 Natalia Portillo <claunia@claunia.com>
* SysV.cs: Detect older version of the XENIX superblock (found
in Lisa XENIX).
2016-07-31 Natalia Portillo <claunia@claunia.com>
* File.cs:

54
DiscImageChef.Filesystems/SysV.cs
View File

@@ -121,6 +121,11 @@ namespace DiscImageChef.Filesystems
if(magic == SYSV_MAGIC || magic == SYSV_CIGAM)
return true;
magic = BitConverter.ToUInt32(sb_sector, 0x1F0); // Old XENIX magic location
if(magic == XENIX_MAGIC || magic == XENIX_CIGAM)
return true;
byte[] coherent_string = new byte[6];
Array.Copy(sb_sector, 0x1E8, coherent_string, 0, 6); // Coherent UNIX s_fname location
s_fname = StringHandlers.CToString(coherent_string);
@@ -175,6 +180,7 @@ namespace DiscImageChef.Filesystems
bool sysvr4 = false;
bool sys7th = false;
bool coherent = false;
bool xenixOld = false;
byte[] sb_sector;
byte sb_size_in_sectors;
@@ -202,6 +208,21 @@ namespace DiscImageChef.Filesystems
break;
}
magic = BigEndianBitConverter.ToUInt32(sb_sector, 0x1F0); // Old XENIX magic location
if(magic == XENIX_MAGIC)
{
BigEndianBitConverter.IsLittleEndian = true; // Little endian
xenixOld = true;
break;
}
if(magic == XENIX_CIGAM)
{
BigEndianBitConverter.IsLittleEndian = false; // Big endian
xenixOld = true;
break;
}
magic = BigEndianBitConverter.ToUInt32(sb_sector, 0x1F8); // XENIX magic location
if(magic == SYSV_MAGIC)
@@ -259,17 +280,44 @@ namespace DiscImageChef.Filesystems
}
}
}
if(!sys7th && !sysv && !coherent && !xenix)
if(!sys7th && !sysv && !coherent && !xenix && !xenixOld)
return;
xmlFSType = new Schemas.FileSystemType();
if(xenix)
if(xenix || xenixOld)
{
byte[] xenix_strings = new byte[6];
XenixSuperBlock xnx_sb = new XenixSuperBlock();
sb_sector = imagePlugin.ReadSectors((ulong)start + partitionStart, sb_size_in_sectors);
if(xenixOld)
{
xnx_sb.s_isize = BigEndianBitConverter.ToUInt16(sb_sector, 0x000);
xnx_sb.s_fsize = BigEndianBitConverter.ToUInt32(sb_sector, 0x002);
xnx_sb.s_nfree = BigEndianBitConverter.ToUInt16(sb_sector, 0x006);
xnx_sb.s_ninode = BigEndianBitConverter.ToUInt16(sb_sector, 0x12C);
xnx_sb.s_flock = sb_sector[0x19A];
xnx_sb.s_ilock = sb_sector[0x19B];
xnx_sb.s_fmod = sb_sector[0x19C];
xnx_sb.s_ronly = sb_sector[0x19D];
xnx_sb.s_time = BigEndianBitConverter.ToUInt32(sb_sector, 0x19E);
xnx_sb.s_tfree = BigEndianBitConverter.ToUInt32(sb_sector, 0x1A2);
xnx_sb.s_tinode = BigEndianBitConverter.ToUInt16(sb_sector, 0x1A6);
xnx_sb.s_cylblks = BigEndianBitConverter.ToUInt16(sb_sector, 0x1A8);
xnx_sb.s_gapblks = BigEndianBitConverter.ToUInt16(sb_sector, 0x1AA);
xnx_sb.s_dinfo0 = BigEndianBitConverter.ToUInt16(sb_sector, 0x1AC);
xnx_sb.s_dinfo1 = BigEndianBitConverter.ToUInt16(sb_sector, 0x1AE);
Array.Copy(sb_sector, 0x1B0, xenix_strings, 0, 6);
xnx_sb.s_fname = StringHandlers.CToString(xenix_strings);
Array.Copy(sb_sector, 0x1B6, xenix_strings, 0, 6);
xnx_sb.s_fpack = StringHandlers.CToString(xenix_strings);
xnx_sb.s_clean = sb_sector[0x1BC];
xnx_sb.s_magic = BigEndianBitConverter.ToUInt32(sb_sector, 0x1F0);
xnx_sb.s_type = BigEndianBitConverter.ToUInt32(sb_sector, 0x1F4);
}
else
{
xnx_sb.s_isize = BigEndianBitConverter.ToUInt16(sb_sector, 0x000);
xnx_sb.s_fsize = BigEndianBitConverter.ToUInt32(sb_sector, 0x002);
xnx_sb.s_nfree = BigEndianBitConverter.ToUInt16(sb_sector, 0x006);
@@ -292,6 +340,7 @@ namespace DiscImageChef.Filesystems
xnx_sb.s_clean = sb_sector[0x284];
xnx_sb.s_magic = BigEndianBitConverter.ToUInt32(sb_sector, 0x3F8);
xnx_sb.s_type = BigEndianBitConverter.ToUInt32(sb_sector, 0x3FC);
}
uint bs = 512;
sb.AppendLine("XENIX filesystem");
@@ -613,6 +662,7 @@ namespace DiscImageChef.Filesystems
BigEndianBitConverter.IsLittleEndian = false; // Return to default (bigendian)
}
// Old XENIX use different offsets
struct XenixSuperBlock
{
/// <summary>0x000, index of first data zone</summary>