public bool Identify(IMediaImage imagePlugin, Partition partition)
{
if (imagePlugin.Info.SectorSize < 512)
{
return(false);
}
// Misaligned
if (imagePlugin.Info.XmlMediaType == XmlMediaType.OpticalDisc)
{
uint sbSize = (uint)((Marshal.SizeOf <EFS_Superblock>() + 0x200) / imagePlugin.Info.SectorSize);
if ((Marshal.SizeOf <EFS_Superblock>() + 0x200) % imagePlugin.Info.SectorSize != 0)
{
sbSize++;
}
byte[] sector = imagePlugin.ReadSectors(partition.Start, sbSize);
if (sector.Length < Marshal.SizeOf <EFS_Superblock>())
{
return(false);
}
byte[] sbpiece = new byte[Marshal.SizeOf <EFS_Superblock>()];
Array.Copy(sector, 0x200, sbpiece, 0, Marshal.SizeOf <EFS_Superblock>());
EFS_Superblock efsSb = Marshal.ByteArrayToStructureBigEndian <EFS_Superblock>(sbpiece);
AaruConsole.DebugWriteLine("EFS plugin", "magic at 0x{0:X3} = 0x{1:X8} (expected 0x{2:X8} or 0x{3:X8})",
0x200, efsSb.sb_magic, EFS_MAGIC, EFS_MAGIC_NEW);
if (efsSb.sb_magic == EFS_MAGIC ||
efsSb.sb_magic == EFS_MAGIC_NEW)
{
return(true);
}
}
else
{
uint sbSize = (uint)(Marshal.SizeOf <EFS_Superblock>() / imagePlugin.Info.SectorSize);
if (Marshal.SizeOf <EFS_Superblock>() % imagePlugin.Info.SectorSize != 0)
{
sbSize++;
}
byte[] sector = imagePlugin.ReadSectors(partition.Start + 1, sbSize);
if (sector.Length < Marshal.SizeOf <EFS_Superblock>())
{
return(false);
}
EFS_Superblock efsSb = Marshal.ByteArrayToStructureBigEndian <EFS_Superblock>(sector);
AaruConsole.DebugWriteLine("EFS plugin", "magic at {0} = 0x{1:X8} (expected 0x{2:X8} or 0x{3:X8})", 1,
efsSb.sb_magic, EFS_MAGIC, EFS_MAGIC_NEW);
if (efsSb.sb_magic == EFS_MAGIC ||
efsSb.sb_magic == EFS_MAGIC_NEW)
{
return(true);
}
}
return(false);
}
public void GetInformation(IMediaImage imagePlugin, Partition partition, out string information,
Encoding encoding)
{
Encoding = encoding ?? Encoding.GetEncoding("iso-8859-15");
information = "";
if (imagePlugin.Info.SectorSize < 512)
{
return;
}
var efsSb = new EFS_Superblock();
// Misaligned
if (imagePlugin.Info.XmlMediaType == XmlMediaType.OpticalDisc)
{
uint sbSize = (uint)((Marshal.SizeOf <EFS_Superblock>() + 0x400) / imagePlugin.Info.SectorSize);
if ((Marshal.SizeOf <EFS_Superblock>() + 0x400) % imagePlugin.Info.SectorSize != 0)
{
sbSize++;
}
byte[] sector = imagePlugin.ReadSectors(partition.Start, sbSize);
if (sector.Length < Marshal.SizeOf <EFS_Superblock>())
{
return;
}
byte[] sbpiece = new byte[Marshal.SizeOf <EFS_Superblock>()];
Array.Copy(sector, 0x200, sbpiece, 0, Marshal.SizeOf <EFS_Superblock>());
efsSb = Marshal.ByteArrayToStructureBigEndian <EFS_Superblock>(sbpiece);
AaruConsole.DebugWriteLine("EFS plugin", "magic at 0x{0:X3} = 0x{1:X8} (expected 0x{2:X8} or 0x{3:X8})",
0x200, efsSb.sb_magic, EFS_MAGIC, EFS_MAGIC_NEW);
}
else
{
uint sbSize = (uint)(Marshal.SizeOf <EFS_Superblock>() / imagePlugin.Info.SectorSize);
if (Marshal.SizeOf <EFS_Superblock>() % imagePlugin.Info.SectorSize != 0)
{
sbSize++;
}
byte[] sector = imagePlugin.ReadSectors(partition.Start + 1, sbSize);
if (sector.Length < Marshal.SizeOf <EFS_Superblock>())
{
return;
}
efsSb = Marshal.ByteArrayToStructureBigEndian <EFS_Superblock>(sector);
AaruConsole.DebugWriteLine("EFS plugin", "magic at {0} = 0x{1:X8} (expected 0x{2:X8} or 0x{3:X8})", 1,
efsSb.sb_magic, EFS_MAGIC, EFS_MAGIC_NEW);
}
if (efsSb.sb_magic != EFS_MAGIC &&
efsSb.sb_magic != EFS_MAGIC_NEW)
{
return;
}
var sb = new StringBuilder();
sb.AppendLine("SGI extent filesystem");
if (efsSb.sb_magic == EFS_MAGIC_NEW)
{
sb.AppendLine("New version");
}
sb.AppendFormat("Filesystem size: {0} basic blocks", efsSb.sb_size).AppendLine();
sb.AppendFormat("First cylinder group starts at block {0}", efsSb.sb_firstcg).AppendLine();
sb.AppendFormat("Cylinder group size: {0} basic blocks", efsSb.sb_cgfsize).AppendLine();
sb.AppendFormat("{0} inodes per cylinder group", efsSb.sb_cgisize).AppendLine();
sb.AppendFormat("{0} sectors per track", efsSb.sb_sectors).AppendLine();
sb.AppendFormat("{0} heads per cylinder", efsSb.sb_heads).AppendLine();
sb.AppendFormat("{0} cylinder groups", efsSb.sb_ncg).AppendLine();
sb.AppendFormat("Volume created on {0}", DateHandlers.UnixToDateTime(efsSb.sb_time)).AppendLine();
sb.AppendFormat("{0} bytes on bitmap", efsSb.sb_bmsize).AppendLine();
sb.AppendFormat("{0} free blocks", efsSb.sb_tfree).AppendLine();
sb.AppendFormat("{0} free inodes", efsSb.sb_tinode).AppendLine();
if (efsSb.sb_bmblock > 0)
{
sb.AppendFormat("Bitmap resides at block {0}", efsSb.sb_bmblock).AppendLine();
}
if (efsSb.sb_replsb > 0)
{
sb.AppendFormat("Replacement superblock resides at block {0}", efsSb.sb_replsb).AppendLine();
}
if (efsSb.sb_lastinode > 0)
{
sb.AppendFormat("Last inode allocated: {0}", efsSb.sb_lastinode).AppendLine();
}
if (efsSb.sb_dirty > 0)
{
sb.AppendLine("Volume is dirty");
}
sb.AppendFormat("Checksum: 0x{0:X8}", efsSb.sb_checksum).AppendLine();
sb.AppendFormat("Volume name: {0}", StringHandlers.CToString(efsSb.sb_fname, Encoding)).AppendLine();
sb.AppendFormat("Volume pack: {0}", StringHandlers.CToString(efsSb.sb_fpack, Encoding)).AppendLine();
information = sb.ToString();
XmlFsType = new FileSystemType
{
Type = "Extent File System", ClusterSize = 512,
Clusters = (ulong)efsSb.sb_size,
FreeClusters = (ulong)efsSb.sb_tfree, FreeClustersSpecified = true,
Dirty = efsSb.sb_dirty > 0,
VolumeName = StringHandlers.CToString(efsSb.sb_fname, Encoding),
VolumeSerial = $"{efsSb.sb_checksum:X8}",
CreationDate = DateHandlers.UnixToDateTime(efsSb.sb_time),
CreationDateSpecified = true
};
}
