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//
// Copyright (c) Microsoft. All rights reserved.
// Licensed under the MIT license. See LICENSE file in the project root for full license information.
//
/*=============================================================
**
** Source: helper.c
**
** Purpose: A child process which will attempt to read and write to files
** which were locked in the parent.
**
**
**============================================================*/
#include <palsuite.h>
#define BUF_SIZE 128
int __cdecl main(int argc, char *argv[])
{
HANDLE TheFile;
int result = 0;
char DataBuffer[BUF_SIZE];
DWORD BytesRead, BytesWritten;
char fileName[] = "testfile.tmp";
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)
{
Fail("ERROR: Could not open file '%s' with CreateFile.",fileName);
}
/* Attempt to Read 5 bytes from this file. Since it is locked, this
should fail.
*/
if(ReadFile(TheFile, DataBuffer, 5, &BytesRead, NULL) != 0)
{
Trace("ERROR: ReadFile should have failed! It was called on "
"a locked file. But, it returned non-zero indicating success.");
result = 1;
}
/* Attempt to Write 5 bytes to this file. Since it is locked this should
fail.
*/
memset(DataBuffer,'X',BUF_SIZE);
if(WriteFile(TheFile, DataBuffer, 5,&BytesWritten, NULL) != 0)
{
Trace("ERROR: WriteFile should have failed! It was called on "
"a locked file. But, it returned non-zero indicating success.");
result = 1;
}
/* Check to ensure that the number of Bytes read/written is still 0,
since nothing should have been read or written.
*/
if(BytesRead != 0 || BytesWritten !=0)
{
Trace("ERROR: The number of bytes read is %d and written is %d. "
"These should both be 0, as the file was locked.",
BytesRead,BytesWritten);
result = 1;
}
PAL_TerminateEx(result);
return result;
}
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