* Write prim archives out as v7 tar files temporarily for testing purposes - not even gzipping yet!

* Using hacked up code to create the correct tar archive headers - this stuff should really go away again before too long
* No user functionality yet

OpenSim/Region/Application/OpenSimMain.cs

@@ -70,7 +70,7 @@ namespace OpenSim
         /// <summary>
         /// The file use to load and save an opensim archive if none has been specified
         /// </summary>
-        protected const string DEFAULT_OAR_BACKUP_FILENAME = "scene.oar.zip";
+        protected const string DEFAULT_OAR_BACKUP_FILENAME = "scene.oar.tar";
 
         public string m_physicsEngine;
         public string m_meshEngineName;

OpenSim/Region/Environment/Modules/World/Archiver/ArchiveRequest.cs

@@ -98,6 +98,17 @@ namespace OpenSim.Region.Environment
         protected internal void ReceivedAllAssets(IDictionary<LLUUID, AssetBase> assets)
         {
             m_log.DebugFormat("[ARCHIVER]: Received all {0} textures required", assets.Count);
+            
+            // XXX: Shouldn't hijack the asset async callback thread like this - this is only temporary
+            
+            TarArchive archive = new TarArchive();
+            
+            foreach (LLUUID uuid in assets.Keys)
+            {
+                archive.AddFile(uuid.ToString(), assets[uuid].Data);
+            }
+            
+            archive.WriteTar(m_savePath);
         }
                 
         /// <summary>

OpenSim/Region/Environment/Modules/World/Archiver/TarArchive.cs

@@ -0,0 +1,174 @@
+/*
+ * Copyright (c) Contributors, http://opensimulator.org/
+ * See CONTRIBUTORS.TXT for a full list of copyright holders.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in the
+ *       documentation and/or other materials provided with the distribution.
+ *     * Neither the name of the OpenSim Project nor the
+ *       names of its contributors may be used to endorse or promote products
+ *       derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Text;
+using System.Reflection;
+using log4net;
+
+namespace OpenSim.Region.Environment
+{    
+    /// <summary>
+    /// Temporary code to produce a tar archive in tar v7 format
+    /// </summary>    
+    public class TarArchive
+    {
+        private static readonly ILog m_log = LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);
+        
+        protected Dictionary<string, byte[]> m_files = new Dictionary<string, byte[]>();
+        
+        protected static System.Text.ASCIIEncoding m_asciiEncoding = new System.Text.ASCIIEncoding();
+
+        /// <summary>
+        /// Add a file to the tar archive
+        /// </summary>
+        /// <param name="filePath"></param>
+        /// <param name="data"></param>
+        public void AddFile(string filePath, byte[] data)
+        {
+            m_files[filePath] = data;
+        }
+        
+        /// <summary>
+        /// Write the raw tar archive data to a file
+        /// </summary>
+        /// <returns></returns>
+        public void WriteTar(string archivePath)
+        {
+            BinaryWriter bw = new BinaryWriter(new FileStream(archivePath, FileMode.Create));                       
+
+            foreach (string filePath in m_files.Keys)
+            {
+                byte[] header = new byte[512];
+                byte[] data = m_files[filePath];
+                
+                //string filePath = "test.txt";                
+                //byte[] data = m_asciiEncoding.GetBytes("hello\n");                                        
+                
+                // file path field (100)
+                byte[] nameBytes = m_asciiEncoding.GetBytes(filePath);
+                int nameSize = (nameBytes.Length >= 100) ? 100 : nameBytes.Length;
+                Array.Copy(nameBytes, header, nameSize);                
+                
+                // file mode (8)
+                byte[] modeBytes = m_asciiEncoding.GetBytes("0000644");
+                Array.Copy(modeBytes, 0, header, 100, 7);
+                
+                // owner user id (8)
+                byte[] ownerIdBytes = m_asciiEncoding.GetBytes("0000764");
+                Array.Copy(ownerIdBytes, 0, header, 108, 7);
+                
+                // group user id (8)
+                byte[] groupIdBytes = m_asciiEncoding.GetBytes("0000764");
+                Array.Copy(groupIdBytes, 0, header, 116, 7);
+                
+                // file size in bytes (12)
+                int fileSize = data.Length;
+                m_log.DebugFormat("[TAR ARCHIVE]: File size of {0} is {1}", filePath, fileSize);
+
+                byte[] fileSizeBytes = ConvertDecimalToPaddedOctalBytes(fileSize, 11);
+                
+                Array.Copy(fileSizeBytes, 0, header, 124, 11);
+                
+                // last modification time (12)
+                byte[] lastModTimeBytes = m_asciiEncoding.GetBytes("11017037332");
+                Array.Copy(lastModTimeBytes, 0, header, 136, 11);                        
+                                                                
+                // link indicator (1)
+                //header[156] = m_asciiEncoding.GetBytes("0")[0];
+                header[156] = 0;
+            
+                Array.Copy(m_asciiEncoding.GetBytes("0000000"), 0, header, 329, 7);
+                Array.Copy(m_asciiEncoding.GetBytes("0000000"), 0, header, 337, 7);
+                
+                // check sum for header block (8) [calculated last]
+                Array.Copy(m_asciiEncoding.GetBytes("        "), 0, header, 148, 8);
+                
+                int checksum = 0;
+                foreach (byte b in header)
+                {
+                    checksum += b;
+                }
+                
+                m_log.DebugFormat("[TAR ARCHIVE]: Decimal header checksum is {0}", checksum);
+            
+                byte[] checkSumBytes = ConvertDecimalToPaddedOctalBytes(checksum, 6);
+                //byte[] checkSumBytes = m_asciiEncoding.GetBytes("007520");
+                
+                Array.Copy(checkSumBytes, 0, header, 148, 6);
+                
+                header[154] = 0;
+                
+                // Write out header                
+                bw.Write(header);
+                
+                // Write out data
+                bw.Write(data);
+                
+                int paddingRequired = 512 - (data.Length % 512);
+                if (paddingRequired > 0)
+                {
+                    m_log.DebugFormat("Padding data with {0} bytes", paddingRequired);
+                    
+                    byte[] padding = new byte[paddingRequired];
+                    bw.Write(padding);
+                }
+            }
+            
+            // Write two consecutive 0 blocks to end the archive
+            byte[] finalZeroPadding = new byte[1024];
+            bw.Write(finalZeroPadding);
+            
+            bw.Close();
+        }
+        
+        public static byte[] ConvertDecimalToPaddedOctalBytes(int d, int padding)
+        {
+            string oString = "";                
+            
+            while (d > 0)
+            {
+                oString = Convert.ToString((byte)'0' + d & 7) + oString;
+                d >>= 3;
+            }
+            
+            while (oString.Length < padding)
+            {
+                oString = "0" + oString;
+            }        
+            
+            m_log.DebugFormat("[TAR ARCHIVE]: oString is {0}", oString);
+            
+            byte[] oBytes = m_asciiEncoding.GetBytes(oString);
+            
+            return oBytes;
+        }
+    }
+}