/// <param name="archive"></param><param name="extractDirectory"></param> <param name="wantExtract"></param>
/// <returns></returns>
private List<TarEntry> InternalListOrExtract(string archive, string extractDirectory, bool wantExtract)
{
var entryList = new List<TarEntry>();
var block = new byte[512];
int blocksToMunch = 0;
int remainingBytes = 0;
Stream output = null;
DateTime mtime = DateTime.Now;
string name = null;
TarEntry entry = null;
var deferredDirTimestamp = new Dictionary<string, DateTime>();
if (!File.Exists(archive))
{
throw new FileNotFoundException("The archive does not exist", archive);
}
using (Stream fs = this.InternalGetInputStream(archive))
{
while (fs.Read(block, 0, block.Length) > 0)
{
if (blocksToMunch > 0)
{
if (output != null)
{
int bytesToWrite = (block.Length < remainingBytes) ? block.Length : remainingBytes;
output.Write(block, 0, bytesToWrite);
remainingBytes -= bytesToWrite;
}
blocksToMunch--;
if (blocksToMunch == 0)
{
if (output != null)
{
if (output is MemoryStream)
{
entry.Name =
name = Encoding.ASCII.GetString((output as MemoryStream).ToArray()).TrimNull();
}
output.Close();
output.Dispose();
if (output is FileStream && !this.TarOptions.DoNotSetTime)
{
File.SetLastWriteTimeUtc(Path.Combine(extractDirectory, name), mtime);
}
output = null;
}
}
continue;
}
HeaderBlock hb = this.Serializer.RawDeserialize(block);
if (!hb.VerifyChksum())
{
throw new Exception("header checksum is invalid.");
}
// if this is the first entry, or if the prior entry is not a GnuLongName
if (entry == null || entry.Type != TarEntryType.GnuLongName)
{
name = hb.GetName();
}
if (string.IsNullOrEmpty(name))
{
break; // EOF
}
mtime = hb.GetMtime();
remainingBytes = hb.GetSize();
if (hb.TypeFlag == 0)
{
hb.TypeFlag = (byte)'0'; // coerce old-style GNU type to posix tar type
}
entry = new TarEntry
{
Name = name, Mtime = mtime, Size = remainingBytes, @Type = (TarEntryType)hb.TypeFlag
};
if (entry.Type != TarEntryType.GnuLongName)
{
entryList.Add(entry);
}
blocksToMunch = (remainingBytes > 0) ? ((remainingBytes - 1) / 512) + 1 : 0;
if (entry.Type == TarEntryType.GnuLongName)
{
if (name != "././@LongLink")
{
if (wantExtract)
{
throw new Exception(
string.Format(
"unexpected name for type 'L' (expected '././@LongLink', got '{0}')", name));
}
}
// for GNU long names, we extract the long name info into a memory stream
output = new MemoryStream();
continue;
}
if (!wantExtract)
{
}
else
{
switch (entry.Type)
{
case TarEntryType.Directory:
if (!Directory.Exists(Path.Combine(extractDirectory, name)))
{
Directory.CreateDirectory(Path.Combine(extractDirectory, name));
// cannot set the time on the directory now, or it will be updated
// by future file writes. Defer until after all file writes are done.
if (!this.TarOptions.DoNotSetTime)
{
deferredDirTimestamp.Add(
Path.Combine(extractDirectory, name).TrimSlash(), mtime);
}
}
else if (this.TarOptions.Overwrite)
{
if (!this.TarOptions.DoNotSetTime)
{
deferredDirTimestamp.Add(
Path.Combine(extractDirectory, name).TrimSlash(), mtime);
}
}
break;
case TarEntryType.FileOld:
case TarEntryType.File:
case TarEntryType.FileContiguous:
string p = Path.GetDirectoryName(Path.Combine(extractDirectory, name));
if (!string.IsNullOrEmpty(p))
{
if (!Directory.Exists(p))
{
Directory.CreateDirectory(p);
}
}
output = this.InternalGetExtractOutputStream(name, extractDirectory);
break;
case TarEntryType.GnuVolumeHeader:
case TarEntryType.CharSpecial:
case TarEntryType.BlockSpecial:
// do nothing on extract
break;
case TarEntryType.SymbolicLink:
break;
default:
throw new Exception(string.Format("unsupported entry type ({0})", hb.TypeFlag));
}
}
}
}
// apply the deferred timestamps on the directories
if (deferredDirTimestamp.Count > 0)
{
foreach (string key in deferredDirTimestamp.Keys)
{
Directory.SetLastWriteTimeUtc(key, deferredDirTimestamp[key]);
}
}
return entryList;
}
/// <param name="archive"></param><param name="extractDirectory"></param> <param name="wantExtract"></param>
/// <returns></returns>
private List <TarEntry> InternalListOrExtract(string archive, string extractDirectory, bool wantExtract)
{
var entryList = new List <TarEntry>();
var block = new byte[512];
int blocksToMunch = 0;
int remainingBytes = 0;
Stream output = null;
DateTime mtime = DateTime.Now;
string name = null;
TarEntry entry = null;
var deferredDirTimestamp = new Dictionary <string, DateTime>();
if (!File.Exists(archive))
{
throw new FileNotFoundException("The archive does not exist", archive);
}
using (Stream fs = this.InternalGetInputStream(archive))
{
while (fs.Read(block, 0, block.Length) > 0)
{
if (blocksToMunch > 0)
{
if (output != null)
{
int bytesToWrite = (block.Length < remainingBytes) ? block.Length : remainingBytes;
output.Write(block, 0, bytesToWrite);
remainingBytes -= bytesToWrite;
}
blocksToMunch--;
if (blocksToMunch == 0)
{
if (output != null)
{
if (output is MemoryStream)
{
entry.Name =
name = Encoding.ASCII.GetString((output as MemoryStream).ToArray()).TrimNull();
}
output.Close();
output.Dispose();
if (output is FileStream && !this.TarOptions.DoNotSetTime)
{
File.SetLastWriteTimeUtc(Path.Combine(extractDirectory, name), mtime);
}
output = null;
}
}
continue;
}
HeaderBlock hb = this.Serializer.RawDeserialize(block);
if (!hb.VerifyChksum())
{
throw new Exception("header checksum is invalid.");
}
// if this is the first entry, or if the prior entry is not a GnuLongName
if (entry == null || entry.Type != TarEntryType.GnuLongName)
{
name = hb.GetName();
}
if (string.IsNullOrEmpty(name))
{
break; // EOF
}
mtime = hb.GetMtime();
remainingBytes = hb.GetSize();
if (hb.TypeFlag == 0)
{
hb.TypeFlag = (byte)'0'; // coerce old-style GNU type to posix tar type
}
entry = new TarEntry
{
Name = name, Mtime = mtime, Size = remainingBytes, @Type = (TarEntryType)hb.TypeFlag
};
if (entry.Type != TarEntryType.GnuLongName)
{
entryList.Add(entry);
}
blocksToMunch = (remainingBytes > 0) ? ((remainingBytes - 1) / 512) + 1 : 0;
if (entry.Type == TarEntryType.GnuLongName)
{
if (name != "././@LongLink")
{
if (wantExtract)
{
throw new Exception(
string.Format(
"unexpected name for type 'L' (expected '././@LongLink', got '{0}')", name));
}
}
// for GNU long names, we extract the long name info into a memory stream
output = new MemoryStream();
continue;
}
if (!wantExtract)
{
}
else
{
switch (entry.Type)
{
case TarEntryType.Directory:
if (!Directory.Exists(Path.Combine(extractDirectory, name)))
{
Directory.CreateDirectory(Path.Combine(extractDirectory, name));
// cannot set the time on the directory now, or it will be updated
// by future file writes. Defer until after all file writes are done.
if (!this.TarOptions.DoNotSetTime)
{
deferredDirTimestamp.Add(
Path.Combine(extractDirectory, name).TrimSlash(), mtime);
}
}
else if (this.TarOptions.Overwrite)
{
if (!this.TarOptions.DoNotSetTime)
{
deferredDirTimestamp.Add(
Path.Combine(extractDirectory, name).TrimSlash(), mtime);
}
}
break;
case TarEntryType.FileOld:
case TarEntryType.File:
case TarEntryType.FileContiguous:
string p = Path.GetDirectoryName(Path.Combine(extractDirectory, name));
if (!string.IsNullOrEmpty(p))
{
if (!Directory.Exists(p))
{
Directory.CreateDirectory(p);
}
}
output = this.InternalGetExtractOutputStream(name, extractDirectory);
break;
case TarEntryType.GnuVolumeHeader:
case TarEntryType.CharSpecial:
case TarEntryType.BlockSpecial:
// do nothing on extract
break;
case TarEntryType.SymbolicLink:
break;
default:
throw new Exception(string.Format("unsupported entry type ({0})", hb.TypeFlag));
}
}
}
}
// apply the deferred timestamps on the directories
if (deferredDirTimestamp.Count > 0)
{
foreach (string key in deferredDirTimestamp.Keys)
{
Directory.SetLastWriteTimeUtc(key, deferredDirTimestamp[key]);
}
}
return(entryList);
}