Caleb Gardner
69 lines
1.9 KiB
Go
69 lines
1.9 KiB
Go
package squashfs
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//The types of compression supported by squashfs.
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const (
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GzipCompression = 1 + iota
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LzmaCompression
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LzoCompression
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XzCompression
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Lz4Compression
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ZstdCompression
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)
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//Superblock contains important information about a squashfs file. Located at the very front of the archive.
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type superblock struct {
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Magic uint32
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InodeCount uint32
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CreationTime uint32
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BlockSize uint32
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FragCount uint32
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CompressionType uint16
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BlockLog uint16
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Flags uint16
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IDCount uint16
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MajorVersion uint16
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MinorVersion uint16
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RootInodeRef uint64
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BytesUsed uint64
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IDTableStart uint64
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XattrTableStart uint64
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InodeTableStart uint64
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DirTableStart uint64
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FragTableStart uint64
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ExportTableStart uint64
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}
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//SuperblockFlags is the parsed version of Superblock.Flags
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type superblockFlags struct {
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UncompressedInodes bool
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UncompressedData bool
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Check bool
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UncompressedFragments bool
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NoFragments bool
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AlwaysFragments bool
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Duplicates bool
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Exportable bool
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UncompressedXattr bool
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NoXattr bool
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CompressorOptions bool
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UncompressedIDs bool
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}
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//GetFlags returns a SuperblockFlags for a given superblock.
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func (s *superblock) GetFlags() superblockFlags {
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return superblockFlags{
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UncompressedInodes: s.Flags&0x1 == 0x1,
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UncompressedData: s.Flags&0x2 == 0x2,
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Check: s.Flags&0x4 == 0x4,
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UncompressedFragments: s.Flags&0x8 == 0x8,
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NoFragments: s.Flags&0x10 == 0x10,
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AlwaysFragments: s.Flags&0x20 == 0x20,
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Duplicates: s.Flags&0x40 == 0x40,
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Exportable: s.Flags&0x80 == 0x80,
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UncompressedXattr: s.Flags&0x100 == 0x100,
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NoXattr: s.Flags&0x200 == 0x200,
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CompressorOptions: s.Flags&0x400 == 0x400,
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UncompressedIDs: s.Flags&0x800 == 0x800,
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}
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}
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