/// <summary>
/// Add the checksum integer to header buffer.
/// </summary>
/// <param name = "value"></param>
/// <param name = "buffer">The header buffer to set the checksum for</param>
/// <param name = "offset">The offset into the buffer for the checksum</param>
/// <param name = "length">The number of header bytes to update.
/// It's formatted differently from the other fields: it has 6 digits, a
/// null, then a space -- rather than digits, a space, then a null.
/// The final space is already there, from checksumming
/// </param>
/// <returns>The modified buffer offset</returns>
static int GetCheckSumOctalBytes(long value, byte[] buffer, int offset, int length)
{
TarHeader.GetOctalBytes(value, buffer, offset, length - 1);
return(offset + length);
}
/// <summary>
/// Construct an entry from an archive's header bytes. File is set
/// to null.
/// </summary>
/// <param name = "headerBuffer">
/// The header bytes from a tar archive entry.
/// </param>
public TarEntry(byte[] headerBuffer)
{
header = new TarHeader();
header.ParseBuffer(headerBuffer);
}
/// <summary>
/// Convenience method that will modify an entry's name directly
/// in place in an entry header buffer byte array.
/// </summary>
/// <param name="buffer">
/// The buffer containing the entry header to modify.
/// </param>
/// <param name="newName">
/// The new name to place into the header buffer.
/// </param>
static public void AdjustEntryName(byte[] buffer, string newName)
{
TarHeader.GetNameBytes(newName, buffer, 0, TarHeader.NAMELEN);
}
/// <summary>
/// Initialise a default instance of <see cref="TarEntry"/>.
/// </summary>
private TarEntry()
{
header = new TarHeader();
}
/// <summary>
/// Fill in a TarHeader with information from a File.
/// </summary>
/// <param name="header">
/// The TarHeader to fill in.
/// </param>
/// <param name="file">
/// The file from which to get the header information.
/// </param>
public void GetFileTarHeader(TarHeader header, string file)
{
if (header == null)
{
throw new ArgumentNullException("header");
}
if (file == null)
{
throw new ArgumentNullException("file");
}
this.file = file;
// bugfix from torhovl from #D forum:
string name = file;
#if !NETCF_1_0 && !NETCF_2_0
// 23-Jan-2004 GnuTar allows device names in path where the name is not local to the current directory
if (name.IndexOf(Environment.CurrentDirectory) == 0)
{
name = name.Substring(Environment.CurrentDirectory.Length);
}
#endif
/*
* if (Path.DirectorySeparatorChar == '\\')
* {
* // check if the OS is Windows
* // Strip off drive letters!
* if (name.Length > 2)
* {
* char ch1 = name[0];
* char ch2 = name[1];
*
* if (ch2 == ':' && Char.IsLetter(ch1))
* {
* name = name.Substring(2);
* }
* }
* }
*/
name = name.Replace(Path.DirectorySeparatorChar, '/');
// No absolute pathnames
// Windows (and Posix?) paths can start with UNC style "\\NetworkDrive\",
// so we loop on starting /'s.
while (name.StartsWith("/"))
{
name = name.Substring(1);
}
header.LinkName = String.Empty;
header.Name = name;
if (Directory.Exists(file))
{
header.Mode = 1003; // Magic number for security access for a UNIX filesystem
header.TypeFlag = TarHeader.LF_DIR;
if ((header.Name.Length == 0) || header.Name[header.Name.Length - 1] != '/')
{
header.Name = header.Name + "/";
}
header.Size = 0;
}
else
{
header.Mode = 33216; // Magic number for security access for a UNIX filesystem
header.TypeFlag = TarHeader.LF_NORMAL;
header.Size = new FileInfo(file.Replace('/', Path.DirectorySeparatorChar)).Length;
}
header.ModTime = System.IO.File.GetLastWriteTime(file.Replace('/', Path.DirectorySeparatorChar)).ToUniversalTime();
header.DevMajor = 0;
header.DevMinor = 0;
}