private CpioFileEntry ReadFileEntry()
{
if (Encoding.ASCII.GetString(reader.ReadBytes(6)) != "070707")
{
throw new IOException("Invalid CPIO file header. Expected magic number field 070707.");
}
CpioFileEntry entry = new CpioFileEntry();
entry.dev = ReadFileEntryFieldShort();
entry.ino = ReadFileEntryFieldShort();
entry.mode = ReadFileEntryFieldShort();
entry.uid = ReadFileEntryFieldShort();
entry.gid = ReadFileEntryFieldShort();
entry.nlink = ReadFileEntryFieldShort();
entry.rdev = ReadFileEntryFieldShort();
entry.mtime = ReadFileEntryFieldInt();
entry.namesize = ReadFileEntryFieldShort();
entry.filesize = ReadFileEntryFieldInt();
entry.filename = Encoding.UTF8.GetString(reader.ReadBytes(entry.namesize - 1));
reader.ReadByte();
entry.cpio_offset = stream.Position;
return(entry);
}
public void ExtractEntry(CpioFileEntry entry, Stream outStream)
{
stream.Seek(entry.cpio_offset, SeekOrigin.Begin);
byte [] block = new byte[4096];
int blocks = entry.filesize / block.Length;
int remainder = entry.filesize % block.Length;
for (int i = 0; i < blocks; i++)
{
stream.Read(block, 0, block.Length);
outStream.Write(block, 0, block.Length);
}
if (remainder > 0)
{
stream.Read(block, 0, remainder);
outStream.Write(block, 0, remainder);
}
}
private void ReadCpioEntries()
{
stream.Seek(0, SeekOrigin.Begin);
while (true)
{
CpioFileEntry entry = ReadFileEntry();
if (entry.filesize == 0 && entry.filename == "TRAILER!!!")
{
break;
}
entries.Add(entry);
total_size += entry.filesize;
stream.Seek(entry.filesize, SeekOrigin.Current);
}
stream.Seek(0, SeekOrigin.Begin);
}
private CpioFileEntry ReadFileEntry()
{
if(Encoding.ASCII.GetString(reader.ReadBytes(6)) != "070707") {
throw new IOException("Invalid CPIO file header. Expected magic number field 070707.");
}
CpioFileEntry entry = new CpioFileEntry();
entry.dev = ReadFileEntryFieldShort();
entry.ino = ReadFileEntryFieldShort();
entry.mode = ReadFileEntryFieldShort();
entry.uid = ReadFileEntryFieldShort();
entry.gid = ReadFileEntryFieldShort();
entry.nlink = ReadFileEntryFieldShort();
entry.rdev = ReadFileEntryFieldShort();
entry.mtime = ReadFileEntryFieldInt();
entry.namesize = ReadFileEntryFieldShort();
entry.filesize = ReadFileEntryFieldInt();
entry.filename = Encoding.UTF8.GetString(reader.ReadBytes(entry.namesize - 1));
reader.ReadByte();
entry.cpio_offset = stream.Position;
return entry;
}
public void ExtractEntry(CpioFileEntry entry, Stream outStream)
{
stream.Seek(entry.cpio_offset, SeekOrigin.Begin);
byte [] block = new byte[4096];
int blocks = entry.filesize / block.Length;
int remainder = entry.filesize % block.Length;
for(int i = 0; i < blocks; i++) {
stream.Read(block, 0, block.Length);
outStream.Write(block, 0, block.Length);
}
if(remainder > 0) {
stream.Read(block, 0, remainder);
outStream.Write(block, 0, remainder);
}
}
public void ExtractEntry(CpioFileEntry entry, string outFile)
{
ExtractEntry(entry, new FileStream(outFile, FileMode.Create));
}
public void ExtractEntry(CpioFileEntry entry, string outFile)
{
ExtractEntry(entry, new FileStream(outFile, FileMode.Create));
}
