[Mono-bugs] [Bug 80770][Nor] New - Console fails to initialize when any std file descriptor is closed

bugzilla-daemon at bugzilla.ximian.com bugzilla-daemon at bugzilla.ximian.com
Fri Feb 9 08:05:54 EST 2007

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Changed by kornelpal at gmail.com.


--- shadow/80770	2007-02-09 08:05:54.000000000 -0500
+++ shadow/80770.tmp.29422	2007-02-09 08:05:54.000000000 -0500
@@ -0,0 +1,84 @@
+Bug#: 80770
+Product: Mono: Class Libraries
+Version: 1.2
+OS: unknown
+OS Details: All non-Windows
+Status: NEW   
+Priority: Normal
+Component: CORLIB
+AssignedTo: mono-bugs at ximian.com                            
+ReportedBy: kornelpal at gmail.com               
+QAContact: mono-bugs at ximian.com
+TargetMilestone: ---
+Summary: Console fails to initialize when any std file descriptor is closed
+Test case:
+using System;
+using Mono.Unix.Native;
+class NoConsoleTest
+	static void Main (string [] args)
+	{
+		Syscall.close (0); // stdin
+		Syscall.close (1); // stdout
+		// keep stderr to be able to print stack trace
+	System.Runtime.CompilerServices.RuntimeHelpers.RunClassConstructor
+ (typeof (Console).TypeHandle);
+	}
+Actual results:
+Unhandled Exception: System.TypeInitializationException: An exception was 
+thrown by the type initializer for System.Console ---> 
+System.ArgumentException: handle
+Parameter name: Invalid.
+  at System.IO.FileStream..ctor (IntPtr handle, FileAccess access, 
+Boolean ownsHandle, Int32 bufferSize, Boolean isAsync, Boolean 
+noBuffering) [0x00108] in /mono-
+  at (wrapper remoting-invoke-with-check) System.IO.FileStream:.ctor 
+  at System.Console.OpenStandardOutput (Int32 bufferSize) [0x00000] 
+in /mono-src/mcs/class/corlib/System/Console.cs:208
+  at System.Console..cctor () [0x00134] in /mono-
+src/mcs/class/corlib/System/Console.cs:119 --- End of inner exception 
+stack trace ---
+  at <0x00000> <unknown method>
+  at (wrapper managed-to-native) 
+  at System.Runtime.CompilerServices.RuntimeHelpers.RunClassConstructor 
+(RuntimeTypeHandle type) [0x00000] in /mono-
+  at NoConsoleTest.Main (System.String[] args) [0x00000]
+Expected results:
+No error.
+io-layer returns INVALID_HANDLE_VALUE in GetStdHandle when the requested 
+std handle is not available. On the other hand Windows returns NULL for 
+the same error.
+Mono FileStream throws IOException for NULL and ArgumentException for 
+INVALID_HANDLE_VALUE. .NET Framework however throws ArgumentException for 
+both cases.
+Mono Console only checks for IOException.
+I think that io-layer, FileStream and Console should be modified as well 
+to match Windows and .NET Framework behavior (NULL instead of 
+as well, null-stream for invalid and unusable console handles).
+In addition I think it's better to use Stream.Null instead of a new 
+NullStream to save resources.

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