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// 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;
}
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