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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: test2.c
**
** Purpose: Open a file, and lock it from start to EOF. Check to ensure
** the current process can still read and write from/to the file.
**
**
**============================================================*/
#include <palsuite.h>
#include "../LockFile.h"
#define FILENAME "testfile.txt"
int __cdecl main(int argc, char *argv[])
{
HANDLE TheFile = NULL;
DWORD FileStart = 0;
DWORD FileEnd = 0;
DWORD BytesWritten = 0;
DWORD BytesRead = 0;
char WriteBuffer[] = "This is some test data.";
char DataBuffer[128];
if(0 != (PAL_Initialize(argc, argv)))
{
return FAIL;
}
/* Call the helper function to Create a file, write 'WriteBuffer' to
the file, and lock the file.
*/
FileEnd = strlen(WriteBuffer);
TheFile = CreateAndLockFile(TheFile, FILENAME, WriteBuffer,
FileStart, FileEnd);
/* Move the file pointer to the start of the file */
if(SetFilePointer(TheFile, 0, NULL, FILE_BEGIN) != 0)
{
Fail("ERROR: SetFilePointer failed to move the file pointer back "
"to the start of the file.");
}
/* Attempt to Read 5 bytes from this file. Since the lock does not
affect the calling process, this should succeed.
*/
if(ReadFile(TheFile, DataBuffer, 5, &BytesRead, NULL) == 0)
{
Fail("ERROR: ReadFile has failed. Attempted to read in 5 bytes from "
"the file '%s' after it had LockFile called upon it, but within "
"the same process.",FILENAME);
}
if(strncmp(DataBuffer, WriteBuffer, 5) != 0)
{
Fail("ERROR: The data read in from ReadFile is not what should have "
"been written in the file. '%s' ",DataBuffer);
}
/* Attempt to Write 5 bytes to this file. Since the lock does not affect
the calling process, this should succeed.
*/
memset(WriteBuffer, 'X', strlen(WriteBuffer));
if(WriteFile(TheFile, WriteBuffer, 5,&BytesWritten, NULL) == 0)
{
Fail("ERROR: WriteFile has failed. Attempted to write 5 bytes to "
"the file '%s' after it had LockFile called upon it, but within "
"the same process.",FILENAME);
}
if(UnlockFile(TheFile, FileStart, 0, FileEnd, 0) == 0)
{
Fail("ERROR: UnlockFile failed. GetLastError returns %d.",
GetLastError());
}
if(CloseHandle(TheFile) == 0)
{
Fail("ERROR: CloseHandle failed to close the file.");
}
PAL_Terminate();
return PASS;
}
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