* Added primitive exception logging capabilities.

* Disabled by default (see OpenSim.ini.example for how to enable)
* Saves exceptions to a folder on disk (default "crashes") when enabled.
* These reports can then be uploaded or posted to help debug an error.

OpenSim/Framework/Util.cs

@@ -560,6 +560,34 @@ namespace OpenSim.Framework
             return ".";
         }
 
+        // From: http://coercedcode.blogspot.com/2008/03/c-generate-unique-filenames-within.html
+        public static string GetUniqueFilename(string FileName)
+        {
+            int count = 0;
+            string Name;
+
+            if (File.Exists(FileName))
+            {
+                FileInfo f = new FileInfo(FileName);
+
+                if (!string.IsNullOrEmpty(f.Extension))
+                {
+                    Name = f.FullName.Substring(0, f.FullName.LastIndexOf('.'));
+                }
+                else
+                {
+                    Name = f.FullName;
+                }
+
+                while (File.Exists(FileName))
+                {
+                    count++;
+                    FileName = Name + count + f.Extension;
+                }
+            }
+            return FileName;
+        }
+
         // Nini (config) related Methods
         public static IConfigSource ConvertDataRowToXMLConfig(DataRow row, string fileName)
         {

OpenSim/Region/Application/Application.cs

@@ -26,6 +26,7 @@
  */
 
 using System;
+using System.IO;
 using System.Net;
 using System.Reflection;
 using log4net;
@@ -42,6 +43,9 @@ namespace OpenSim
         
         public static string iniFilePath = "";
 
+        public static bool m_saveCrashDumps = false;
+        public static string m_crashDir = "crashes";
+
         //could move our main function into OpenSimMain and kill this class
         public static void Main(string[] args)
         {
@@ -84,6 +88,9 @@ namespace OpenSim
             bool background = configSource.Configs["Startup"].GetBoolean("background", false);
             bool hgrid = configSource.Configs["Startup"].GetBoolean("hypergrid", false);
 
+            m_saveCrashDumps = configSource.Configs["Startup"].GetBoolean("save_crashes", false);
+            m_crashDir = configSource.Configs["Startup"].GetString("crash_dir", m_crashDir);
+
             if (background)
             {
                 OpenSimBase sim = new OpenSimBackground(configSource);
@@ -139,19 +146,23 @@ namespace OpenSim
 
             m_log.ErrorFormat("[APPLICATION]: {0}", msg);
 
-            // Try to post errormessage to an URL
+            // Log exception to disk
             try
             {
-                // DISABLED UNTIL WE CAN DISCUSS IF THIS IS MORALLY RIGHT OR NOT
-                // Note! Needs reference to System.Web
-                //System.Net.WebClient wc = new WebClient();
-                //wc.DownloadData("http://www.opensimulator.org/ErrorReport.php?Msg=" +
-                //                System.Web.HttpUtility.UrlEncode(msg));
-                //wc.Dispose();
-            }
-            catch (WebException)
+                if (!Directory.Exists(m_crashDir))
                 {
-                // Ignore
+                    Directory.CreateDirectory(m_crashDir);
+                }
+                StreamWriter m_crashLog =
+                    new StreamWriter(
+                        Path.Combine(m_crashDir, Util.GetUniqueFilename(ex.GetType() + ".txt"))
+                        );
+                m_crashLog.WriteLine(msg);
+                m_crashLog.Close();
+            }
+            catch (Exception e2)
+            {
+                m_log.ErrorFormat("[CRASH LOGGER CRASHED]: {0}", e2);
             }
 
             _IsHandlingException=false;

bin/OpenSim.ini.example

@@ -1,4 +1,13 @@
 [Startup]
+; Set this to true if you want to log crashes to disk
+; this can be useful when submitting bug reports.
+save_crashes = false
+
+; Directory to save crashes to if above is enabled
+; (eg default is /opensimdir/crashes/*.txt or C:\opensim\crashes\*.txt)
+crash_dir = "crashes"
+
+
     ; Set this to true if you are connecting your OpenSimulator regions to a grid
     ; Set this to false if you are running OpenSimulator in standalone mode
     gridmode = false