/// <summary>
/// Adds a directory entry to the <see cref="CpioFile"/>.
/// </summary>
/// <param name="entry">
/// The <see cref="ArchiveEntry"/> which represents the directory.
/// </param>
/// <param name="cpioFile">
/// The <see cref="CpioFile"/> to which to add the directory entry.
/// </param>
public void AddDirectory(ArchiveEntry entry, CpioFile cpioFile)
{
// Write out an entry for the current directory
CpioHeader directoryHeader = new CpioHeader()
{
Check = 0,
DevMajor = 1,
DevMinor = 0,
FileSize = 0,
Gid = 0,
Ino = entry.Inode,
FileMode = entry.Mode,
LastModified = entry.Modified,
Nlink = 1,
RDevMajor = 0,
RDevMinor = 0,
Signature = "070701",
Uid = 0,
NameSize = 0
};
var targetPath = entry.TargetPath;
if (!targetPath.StartsWith("."))
{
targetPath = "." + targetPath;
}
cpioFile.Write(directoryHeader, targetPath, new MemoryStream(Array.Empty <byte>()));
}
/// <summary>
/// Adds a file entry to a <see cref="CpioFile"/>.
/// </summary>
/// <param name="entry">
/// The file entry to add.
/// </param>
/// <param name="cpioFile">
/// The <see cref="CpioFile"/> to which to add the entry.
/// </param>
public void AddFile(ArchiveEntry entry, CpioFile cpioFile)
{
var targetPath = entry.TargetPath;
if (!targetPath.StartsWith("."))
{
targetPath = "." + targetPath;
}
using (Stream fileStream = File.OpenRead(entry.SourceFilename))
{
CpioHeader cpioHeader = new CpioHeader()
{
Check = 0,
DevMajor = 1,
DevMinor = 0,
FileSize = entry.FileSize,
Gid = 0, // root
Uid = 0, // root
Ino = entry.Inode,
FileMode = entry.Mode,
LastModified = entry.Modified,
NameSize = (uint)entry.TargetPath.Length + 1,
Nlink = 1,
RDevMajor = 0,
RDevMinor = 0,
Signature = "070701",
};
cpioFile.Write(cpioHeader, targetPath, fileStream);
}
}
/// <summary>
/// Adds a symlink entry to a <see cref="CpioFile"/>.
/// </summary>
/// <param name="entry">
/// The symlink entry to add.
/// </param>
/// <param name="cpioFile">
/// The <see cref="CpioFile"/> to which to add the entry.
/// </param>
public void AddSymlink(ArchiveEntry entry, CpioFile cpioFile)
{
var targetPath = entry.TargetPath;
if (!targetPath.StartsWith("."))
{
targetPath = "." + targetPath;
}
CpioHeader cpioHeader = new CpioHeader()
{
Check = 0,
DevMajor = 1,
DevMinor = 0,
FileSize = entry.FileSize,
Gid = 0, // root
Uid = 0, // root
Ino = entry.Inode,
FileMode = entry.Mode,
LastModified = entry.Modified,
NameSize = (uint)entry.TargetPath.Length + 1,
Nlink = 1,
RDevMajor = 0,
RDevMinor = 0,
Signature = "070701",
};
cpioFile.Write(cpioHeader, targetPath, new MemoryStream(Encoding.UTF8.GetBytes(entry.LinkTo)));
}
public static void WriteEntry(Stream stream, ArchiveEntry entry, Stream data = null)
{
var targetPath = entry.TargetPath;
if (!targetPath.StartsWith("."))
{
targetPath = "." + targetPath;
}
// Handle long file names (> 99 characters). If this is the case, add a "././@LongLink" pseudo-entry
// which contains the full name.
if (targetPath.Length > 99)
{
// Must include a trailing \0
var nameLength = Encoding.UTF8.GetByteCount(targetPath);
byte[] entryName = new byte[nameLength + 1];
Encoding.UTF8.GetBytes(targetPath, 0, targetPath.Length, entryName, 0);
ArchiveEntry nameEntry = new ArchiveEntry()
{
Mode = entry.Mode,
Modified = entry.Modified,
TargetPath = "././@LongLink",
Owner = entry.Owner,
Group = entry.Group
};
using (MemoryStream nameStream = new MemoryStream(entryName))
{
WriteEntry(stream, nameEntry, nameStream);
}
targetPath = targetPath.Substring(0, 99);
}
var isDir = entry.Mode.HasFlag(LinuxFileMode.S_IFDIR);
var isLink = !isDir && !string.IsNullOrWhiteSpace(entry.LinkTo);
var isFile = !isDir && !isLink;
TarTypeFlag type;
if (entry.TargetPath == "././@LongLink")
{
type = TarTypeFlag.LongName;
}
else if (isFile)
{
type = TarTypeFlag.RegType;
}
else if (isDir)
{
type = TarTypeFlag.DirType;
}
else
{
type = TarTypeFlag.LnkType;
}
bool dispose = false;
if (data == null)
{
if (isFile)
{
dispose = true;
data = File.OpenRead(entry.SourceFilename);
}
else
{
data = new MemoryStream();
}
}
try
{
var hdr = new TarHeader()
{
// No need to set the file type, the tar header has a special field for that.
FileMode = entry.Mode & LinuxFileMode.PermissionsMask,
DevMajor = null,
DevMinor = null,
FileName = targetPath,
FileSize = (uint)data.Length,
GroupId = 0,
UserId = 0,
GroupName = entry.Group,
LinkName = string.Empty,
Prefix = string.Empty,
TypeFlag = type,
UserName = entry.Owner,
Version = null,
LastModified = entry.Modified,
Magic = "ustar"
};
WriteEntry(stream, hdr, data);
}
finally
{
if (dispose)
{
data.Dispose();
}
}
}
public static void WriteEntry(Stream stream, ArchiveEntry entry, Stream data = null)
{
var targetPath = entry.TargetPath;
if (!targetPath.StartsWith("."))
{
targetPath = "." + targetPath;
}
var isDir = entry.Mode.HasFlag(LinuxFileMode.S_IFDIR);
var isLink = !isDir && !string.IsNullOrWhiteSpace(entry.LinkTo);
var isFile = !isDir && !isLink;
var type = isFile
? TarTypeFlag.RegType
: isDir
? TarTypeFlag.DirType
: TarTypeFlag.LnkType;
bool dispose = false;
if (data == null)
{
if (isFile)
{
dispose = true;
data = File.OpenRead(entry.SourceFilename);
}
else
{
data = new MemoryStream();
}
}
try
{
var hdr = new TarHeader()
{
FileMode = entry.Mode,
DevMajor = null,
DevMinor = null,
FileName = targetPath,
FileSize = (uint)data.Length,
GroupId = 0,
UserId = 0,
GroupName = entry.Group,
LinkName = string.Empty,
Prefix = string.Empty,
TypeFlag = type,
UserName = entry.Owner,
Version = null,
LastModified = entry.Modified,
Magic = "ustar"
};
WriteEntry(stream, hdr, data);
}
finally
{
if (dispose)
{
data.Dispose();
}
}
}
