Bump to v2.1 with quality-of-life improvements

- Add --version/-V flag
- Fix pipe output to loop until EOF (no more silent truncation >1MB)
- Remove leading blank line from captured output
- Propagate child exit code in all modes, not just passthrough

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: totekuh

README.md

@@ -1,4 +1,4 @@
-# RunEx v2.0
+# RunEx v2.1
 
 Run processes as another user. Works from interactive and service contexts, handles window station DACLs, redirects I/O. Supports `/netonly` logon for running AD tooling from non-domain-joined machines.
 

src/Program.cs

@@ -5,7 +5,7 @@
 public static class RunExMainClass
 {
     private static readonly string help = @"
-RunEx v2.0 - @totekuh
+RunEx v2.1 - @totekuh
 
 Usage:
     RunEx.exe username password cmd [args...] [options]
@@ -30,6 +30,7 @@ RunEx.exe user pass -l 8 -- cmd /c echo -v
 Options:
     -h, --help              show this help message and exit
         --help-all          show extended reference (all logon types, etc.)
+    -V, --version           show version and exit
     -d, --domain <domain>   domain of the user, if in a domain (default: """")
     -l, --logon-type <type> logon type for the new process token (default: 2)
                             Accepts a number or name alias. See guide below.
@@ -265,6 +266,10 @@ public static string RunExMain(string[] args)
                 }
                 switch (args[ctr])
                 {
+                    case "-V":
+                    case "--version":
+                        return "RunEx v2.1";
+
                     case "-h":
                     case "--help":
                     case "/?":
@@ -381,8 +386,7 @@ public static string RunExMain(string[] args)
             output = String.Format("{0}", e.Message);
         }
 
-        if (passthrough)
-            Environment.ExitCode = invoker.ExitCode;
+        Environment.ExitCode = invoker.ExitCode;
 
         return output;
     }

src/RunEx.cs

@@ -39,14 +39,14 @@ private bool CreateAnonymousPipeEveryoneAccess(ref IntPtr hReadPipe, ref IntPtr
 
     private string ReadOutputFromPipe(IntPtr hReadPipe)
     {
-        string output = "";
+        StringBuilder sb = new StringBuilder();
         uint dwBytesRead = 0;
         byte[] buffer = new byte[NativeMethods.BUFFER_SIZE_PIPE];
-        if(!NativeMethods.ReadFile(hReadPipe, buffer, NativeMethods.BUFFER_SIZE_PIPE, out dwBytesRead, IntPtr.Zero)){
-            output += "No output received from the process.\r\n";
+        while (NativeMethods.ReadFile(hReadPipe, buffer, NativeMethods.BUFFER_SIZE_PIPE, out dwBytesRead, IntPtr.Zero) && dwBytesRead > 0)
+        {
+            sb.Append(Encoding.Default.GetString(buffer, 0, (int)dwBytesRead));
         }
-        output += Encoding.Default.GetString(buffer, 0, (int)dwBytesRead);
-        return output;
+        return sb.ToString();
     }
 
     private IntPtr ConnectRemote(string[] remote)
@@ -595,7 +595,10 @@ public string RunAs(string username, string password, string cmd, string domainN
             this.hOutputWrite = IntPtr.Zero;
             this.hErrorWrite = IntPtr.Zero;
             NativeMethods.WaitForSingleObject(processInfo.process, processTimeout);
-            output += "\r\n" + ReadOutputFromPipe(this.hOutputRead);
+            uint pipeExitCode = 0;
+            NativeMethods.GetExitCodeProcess(processInfo.process, out pipeExitCode);
+            this.ExitCode = (int)pipeExitCode;
+            output += ReadOutputFromPipe(this.hOutputRead);
         } else {
             int sessionId = System.Diagnostics.Process.GetCurrentProcess().SessionId;
             if (remoteImpersonation)