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Adds support for big-endian squashfs.

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Natalia Portillo
2016-09-14 14:59:29 +01:00
parent 8da64e3e67
commit 0803098fa1
1 changed files with 21 additions and 6 deletions
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27
DiscImageChef.Filesystems/Squash.cs
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@@ -88,6 +88,7 @@ namespace DiscImageChef.Filesystems
/// Identifier for Squash
/// </summary>
const uint Squash_MAGIC = 0x73717368;
const uint Squash_CIGAM = 0x68737173;
public override bool Identify(ImagePlugins.ImagePlugin imagePlugin, ulong partitionStart, ulong partitionEnd)
{
@@ -98,23 +99,37 @@ namespace DiscImageChef.Filesystems
uint magic = BitConverter.ToUInt32(sector, 0x00);
return magic == Squash_MAGIC;
return magic == Squash_MAGIC || magic == Squash_CIGAM;
}
public override void GetInformation(ImagePlugins.ImagePlugin imagePlugin, ulong partitionStart, ulong partitionEnd, out string information)
{
byte[] sector = imagePlugin.ReadSector(partitionStart);
uint magic = BitConverter.ToUInt32(sector, 0x00);
SquashSuperBlock sqSb = new SquashSuperBlock();
IntPtr sqSbPtr = Marshal.AllocHGlobal(Marshal.SizeOf(sqSb));
Marshal.Copy(sector, 0, sqSbPtr, Marshal.SizeOf(sqSb));
sqSb = (SquashSuperBlock)Marshal.PtrToStructure(sqSbPtr, typeof(SquashSuperBlock));
Marshal.FreeHGlobal(sqSbPtr);
bool littleEndian = true;
if(magic == Squash_MAGIC)
{
IntPtr sqSbPtr = Marshal.AllocHGlobal(Marshal.SizeOf(sqSb));
Marshal.Copy(sector, 0, sqSbPtr, Marshal.SizeOf(sqSb));
sqSb = (SquashSuperBlock)Marshal.PtrToStructure(sqSbPtr, typeof(SquashSuperBlock));
Marshal.FreeHGlobal(sqSbPtr);
}
else if(magic == Squash_CIGAM)
{
sqSb = BigEndianMarshal.ByteArrayToStructureBigEndian<SquashSuperBlock>(sector);
littleEndian = false;
}
StringBuilder sbInformation = new StringBuilder();
sbInformation.AppendLine("Squash file system");
if(littleEndian)
sbInformation.AppendLine("Little-endian");
else
sbInformation.AppendLine("Big-endian");
sbInformation.AppendFormat("Volume version {0}.{1}", sqSb.s_major, sqSb.s_minor).AppendLine();
sbInformation.AppendFormat("Volume has {0} bytes", sqSb.bytes_used).AppendLine();
sbInformation.AppendFormat("Volume has {0} bytes per block", sqSb.block_size).AppendLine();