/// <summary>
/// Add the checksum integer to header buffer.
/// </summary>
/// <param name="val">The value.</param>
/// <param name="buf">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>
private static int GetCheckSumOctalBytes(long val, byte[] buf, int offset, int length)
{
TarHeader.GetOctalBytes(val, buf, offset, length - 1);
return(offset + length);
}
/// <summary>
/// Construct a TarEntry using the <paramref name="header">header</paramref> provided
/// </summary>
/// <param name="header">Header details for entry</param>
public TarEntry(TarHeader header)
{
file = null;
this.header = header;
}
/// <summary>
/// Convenience method that will modify an entry's name directly
/// in place in an entry header buffer byte array.
/// </summary>
/// <param name="outbuf">The buffer containing the entry header to modify.</param>
/// <param name="newName">The new name to place into the header buffer.</param>
public void AdjustEntryName(byte[] outbuf, string newName)
{
int offset = 0;
TarHeader.GetNameBytes(newName, outbuf, offset, TarHeader.NAMELEN);
}
/// <summary>
/// Fill in a TarHeader with information from a File.
/// </summary>
/// <param name="hdr">The TarHeader to fill in.</param>
/// <param name="file">The file from which to get the header information.</param>
public void GetFileTarHeader(TarHeader hdr, string file)
{
this.file = file;
// bugfix from torhovl from #D forum:
string name = file;
#if !COMPACT_FRAMEWORK
// 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);
}
hdr.LinkName = String.Empty;
hdr.Name = name;
if (Directory.Exists(file))
{
hdr.Mode = 1003; // Magic number for security access for a UNIX filesystem
hdr.TypeFlag = TarHeader.LF_DIR;
if (hdr.Name.Length == 0 || hdr.Name[hdr.Name.Length - 1] != '/')
{
hdr.Name = hdr.Name + "/";
}
hdr.Size = 0;
}
else
{
hdr.Mode = 33216; // Magic number for security access for a UNIX filesystem
hdr.TypeFlag = TarHeader.LF_NORMAL;
hdr.Size = new FileInfo(file.Replace('/', Path.DirectorySeparatorChar)).Length;
}
hdr.ModTime = System.IO.File.GetLastWriteTime(file.Replace('/', Path.DirectorySeparatorChar)).ToUniversalTime();
hdr.DevMajor = 0;
hdr.DevMinor = 0;
}
/// <summary>
/// Initialization code common to all pseudo constructors.
/// </summary>
void Initialize()
{
this.file = null;
this.header = new TarHeader();
}