1 files changed, 71 insertions, 0 deletions
diff --git a/src/pal/tests/palsuite/filemapping_memmgt/LockFile/test6/helper.cpp b/src/pal/tests/palsuite/filemapping_memmgt/LockFile/test6/helper.cpp
new file mode 100644
index 0000000000..98112fc4a5
--- /dev/null
+++ b/src/pal/tests/palsuite/filemapping_memmgt/LockFile/test6/helper.cpp
@@ -0,0 +1,71 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+/*=============================================================
+**
+** Source: helper.c
+**
+** Purpose: A child process which will attempt to append to the end of 
+** a locked file.
+**
+**
+**============================================================*/
+
+#include <palsuite.h>
+
+#define FILENAME "testfile.txt"
+#define BUF_SIZE 128
+
+int __cdecl main(int argc, char *argv[])
+{
+    HANDLE TheFile;
+    int result = 0;
+    char DataBuffer[BUF_SIZE];
+    DWORD BytesWritten;
+    
+    if(0 != (PAL_Initialize(argc, argv)))
+    {
+        return FAIL;
+    }
+    
+    /* Open the same file that the parent has opened and locked */
+    TheFile = CreateFile(FILENAME,     
+                         GENERIC_READ|GENERIC_WRITE, 
+                         FILE_SHARE_READ|FILE_SHARE_WRITE,
+                         NULL,     
+                         OPEN_EXISTING,                 
+                         FILE_ATTRIBUTE_NORMAL, 
+                         NULL);
+    
+    if (TheFile == INVALID_HANDLE_VALUE) 
+    { 
+        Trace("ERROR: Could not open file '%s' with CreateFile.  "
+             "GetLastError() returns %d.",FILENAME,GetLastError()); 
+        result = -1;
+    }
+      
+    
+    /* Move the FilePointer to the EOF */
+    if(SetFilePointer(TheFile,0,NULL,FILE_END) == INVALID_SET_FILE_POINTER)
+    {
+        Trace("ERROR: Could not set the file pointer to the EOF "
+             "using SetFilePointer.  It returned INVALID_SET_FILE_POINTER.");
+        result = -1;
+    }
+
+    memset(DataBuffer, 'X', BUF_SIZE);
+
+    /* Return the result of WriteFile -- we want to check in the parent that
+       this was successful.  Note: WriteFile doesn't get run if something
+       failed during the setup, in that case -1 is returned.
+    */
+
+    if(result != -1)
+    {
+        result = WriteFile(TheFile, DataBuffer, 3,&BytesWritten, NULL);   
+    }
+    
+    PAL_TerminateEx(result);
+    return result;
+}