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diff --git a/src/VBox/Runtime/testcase/tstFileAppendWin-1.cpp b/src/VBox/Runtime/testcase/tstFileAppendWin-1.cpp
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+/* $Id: tstFileAppendWin-1.cpp $ */
+/** @file
+ * IPRT Testcase - Exploration of File Appending on Windows.
+ */
+
+/*
+ * Copyright (C) 2008-2023 Oracle and/or its affiliates.
+ *
+ * This file is part of VirtualBox base platform packages, as
+ * available from https://www.virtualbox.org.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation, in version 3 of the
+ * License.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <https://www.gnu.org/licenses>.
+ *
+ * The contents of this file may alternatively be used under the terms
+ * of the Common Development and Distribution License Version 1.0
+ * (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
+ * in the VirtualBox distribution, in which case the provisions of the
+ * CDDL are applicable instead of those of the GPL.
+ *
+ * You may elect to license modified versions of this file under the
+ * terms and conditions of either the GPL or the CDDL or both.
+ *
+ * SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
+ */
+
+
+/*********************************************************************************************************************************
+* Header Files *
+*********************************************************************************************************************************/
+#include <iprt/win/windows.h>
+#include <stdio.h>
+#include <string.h>
+#include <stdarg.h>
+
+
+/*********************************************************************************************************************************
+* Global Variables *
+*********************************************************************************************************************************/
+static int g_cErrors = 0;
+
+
+static int MyFailure(const char *pszFormat, ...)
+{
+ va_list va;
+
+ printf("tstFileAppendWin-1: FATAL: ");
+ va_start(va, pszFormat);
+ vprintf(pszFormat, va);
+ va_end(va);
+ g_cErrors++;
+ return 1;
+}
+
+
+void MyError(const char *pszFormat, ...)
+{
+ va_list va;
+
+ printf("tstFileAppendWin-1: ERROR: ");
+ va_start(va, pszFormat);
+ vprintf(pszFormat, va);
+ va_end(va);
+ g_cErrors++;
+}
+
+
+int main()
+{
+ HANDLE hFile;
+ LARGE_INTEGER off;
+ DWORD cb;
+ char szBuf[256];
+
+
+ printf("tstFileAppendWin-1: TESTING...\n");
+
+ /*
+ * Open it write only and do some appending.
+ * Checking that read fails and that the file position changes after the read.
+ */
+ DeleteFile("tstFileAppendWin-1.tst");
+ hFile = CreateFile("tstFileAppendWin-1.tst",
+ (FILE_GENERIC_WRITE & ~FILE_WRITE_DATA),
+ FILE_SHARE_READ,
+ NULL,
+ CREATE_ALWAYS,
+ FILE_ATTRIBUTE_NORMAL,
+ NULL);
+ if (hFile == INVALID_HANDLE_VALUE)
+ return MyFailure("1st CreateFile: %d\n", GetLastError());
+
+ off.QuadPart = 0;
+ if (!SetFilePointerEx(hFile, off, &off, FILE_CURRENT))
+ MyError("1st SetFilePointerEx failed: %d\n", GetLastError());
+ else if (off.QuadPart != 0)
+ MyError("unexpected position on open: %ld - expected 0\n", (long)off.QuadPart);
+
+ if (!WriteFile(hFile, "0123456789", 10, &cb, NULL))
+ MyError("write fail: %d\n", GetLastError());
+
+ off.QuadPart = 0;
+ if (!SetFilePointerEx(hFile, off, &off, FILE_CURRENT))
+ MyError("2nd SetFilePointerEx failed: %d\n", GetLastError());
+ else if (off.QuadPart != 10)
+ MyError("unexpected position on write: %ld - expected 10\n", (long)off.QuadPart);
+ else
+ printf("tstFileAppendWin-1: off=%ld after first write\n", (long)off.QuadPart);
+
+ SetLastError(0);
+ if (ReadFile(hFile, szBuf, 1, &cb, NULL))
+ MyError("read didn't fail! cb=%#lx lasterr=%d\n", (long)cb, GetLastError());
+
+ off.QuadPart = 5;
+ if (!SetFilePointerEx(hFile, off, &off, FILE_BEGIN))
+ MyError("3rd SetFilePointerEx failed: %d\n", GetLastError());
+ else if (off.QuadPart != 5)
+ MyError("unexpected position after set file pointer: %ld - expected 5\n", (long)off.QuadPart);
+
+ CloseHandle(hFile);
+
+ /*
+ * Open it write only and do some more appending.
+ * Checking the initial position and that it changes after the write.
+ */
+ hFile = CreateFile("tstFileAppendWin-1.tst",
+ (FILE_GENERIC_WRITE & ~FILE_WRITE_DATA),
+ FILE_SHARE_READ,
+ NULL,
+ OPEN_EXISTING,
+ FILE_ATTRIBUTE_NORMAL,
+ NULL);
+ if (hFile == INVALID_HANDLE_VALUE)
+ return MyFailure("2nd CreateFile: %d\n", GetLastError());
+
+ off.QuadPart = 0;
+ if (!SetFilePointerEx(hFile, off, &off, FILE_CURRENT))
+ MyError("4th SetFilePointerEx failed: %d\n", GetLastError());
+ else if (off.QuadPart != 0)
+ MyError("unexpected position on open: %ld - expected 0\n", (long)off.QuadPart);
+ else
+ printf("tstFileAppendWin-1: off=%ld on 2nd open\n", (long)off.QuadPart);
+
+ if (!WriteFile(hFile, "abcdefghij", 10, &cb, NULL))
+ MyError("2nd write failed: %d\n", GetLastError());
+
+ off.QuadPart = 0;
+ if (!SetFilePointerEx(hFile, off, &off, FILE_CURRENT))
+ MyError("5th SetFilePointerEx failed: %d\n", GetLastError());
+ else if (off.QuadPart != 20)
+ MyError("unexpected position on 2nd write: %ld - expected 20\n", (long)off.QuadPart);
+ else
+ printf("tstFileAppendWin-1: off=%ld after 2nd write\n", (long)off.QuadPart);
+
+ CloseHandle(hFile);
+
+ /*
+ * Open it read/write.
+ * Check the initial position and read stuff. Then append some more and
+ * check the new position and see that read returns 0/EOF. Finally,
+ * do some seeking and read from a new position.
+ */
+ hFile = CreateFile("tstFileAppendWin-1.tst",
+ (FILE_GENERIC_WRITE & ~FILE_WRITE_DATA) | GENERIC_READ,
+ FILE_SHARE_READ,
+ NULL,
+ OPEN_EXISTING,
+ FILE_ATTRIBUTE_NORMAL,
+ NULL);
+ if (hFile == INVALID_HANDLE_VALUE)
+ return MyFailure("3rd CreateFile: %d\n", GetLastError());
+
+ off.QuadPart = 0;
+ if (!SetFilePointerEx(hFile, off, &off, FILE_CURRENT))
+ MyError("6th SetFilePointerEx failed: %d\n", GetLastError());
+ else if (off.QuadPart != 0)
+ MyError("unexpected position on open: %ld - expected 0\n", (long)off.QuadPart);
+ else
+ printf("tstFileAppendWin-1: off=%ld on 3rd open\n", (long)off.QuadPart);
+
+ if (!ReadFile(hFile, szBuf, 10, &cb, NULL) || cb != 10)
+ MyError("1st ReadFile failed: %d\n", GetLastError());
+ else if (memcmp(szBuf, "0123456789", 10))
+ MyError("read the wrong stuff: %.10s - expected 0123456789\n", szBuf);
+
+ off.QuadPart = 0;
+ if (!SetFilePointerEx(hFile, off, &off, FILE_CURRENT))
+ MyError("7th SetFilePointerEx failed: %d\n", GetLastError());
+ else if (off.QuadPart != 10)
+ MyError("unexpected position on 1st read: %ld - expected 0\n", (long)off.QuadPart);
+ else
+ printf("tstFileAppendWin-1: off=%ld on 1st read\n", (long)off.QuadPart);
+
+ if (!WriteFile(hFile, "klmnopqrst", 10, &cb, NULL))
+ MyError("3rd write failed: %d\n", GetLastError());
+
+ off.QuadPart = 0;
+ if (!SetFilePointerEx(hFile, off, &off, FILE_CURRENT))
+ MyError("8th SetFilePointerEx failed: %d\n", GetLastError());
+ else if (off.QuadPart != 30)
+ MyError("unexpected position on 3rd write: %ld - expected 30\n", (long)off.QuadPart);
+ else
+ printf("tstFileAppendWin-1: off=%ld after 3rd write\n", (long)off.QuadPart);
+
+ SetLastError(0);
+ if (ReadFile(hFile, szBuf, 1, &cb, NULL) && cb != 0)
+ MyError("read after write didn't fail! cb=%#lx lasterr=%d\n", (long)cb, GetLastError());
+
+ off.QuadPart = 15;
+ if (!SetFilePointerEx(hFile, off, &off, FILE_BEGIN))
+ MyError("9th SetFilePointerEx failed: %d\n", GetLastError());
+ else if (off.QuadPart != 15)
+ MyError("unexpected position on 3rd write: %ld - expected 15\n", (long)off.QuadPart);
+ else
+ {
+ if (!ReadFile(hFile, szBuf, 10, &cb, NULL) || cb != 10)
+ MyError("1st ReadFile failed: %d\n", GetLastError());
+ else if (memcmp(szBuf, "fghijklmno", 10))
+ MyError("read the wrong stuff: %.10s - expected fghijklmno\n", szBuf);
+
+ off.QuadPart = 0;
+ if (!SetFilePointerEx(hFile, off, &off, FILE_CURRENT))
+ MyError("10th SetFilePointerEx failed: %d\n", GetLastError());
+ else if (off.QuadPart != 25)
+ MyError("unexpected position on 2nd read: %ld - expected 25\n", (long)off.QuadPart);
+ else
+ printf("tstFileAppendWin-1: off=%ld after 2nd read\n", (long)off.QuadPart);
+ }
+
+ CloseHandle(hFile);
+
+ /*
+ * Open it read only + append and check that we cannot write to it.
+ */
+ hFile = CreateFile("tstFileAppendWin-1.tst",
+ FILE_APPEND_DATA | GENERIC_READ,
+ FILE_SHARE_READ,
+ NULL,
+ CREATE_ALWAYS,
+ FILE_ATTRIBUTE_NORMAL,
+ NULL);
+ if (hFile == INVALID_HANDLE_VALUE)
+ return MyFailure("4th CreateFile: %d\n", GetLastError());
+
+ SetLastError(0);
+ if (WriteFile(hFile, "pqrstuvwx", 10, &cb, NULL))
+ MyError("write didn't on read-only+append open: %d cb=%#lx\n", GetLastError(), (long)cb);
+
+ CloseHandle(hFile);
+ DeleteFile("tstfileAppendWin-1.tst");
+
+ if (g_cErrors)
+ printf("tstFileAppendWin-1: FAILED\n");
+ else
+ printf("tstFileAppendWin-1: SUCCESS\n");
+ return g_cErrors ? 1 : 0;
+}
+
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