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Cx
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Posts: 367
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 Posted: Mon Jun 09, 2008 9:38 pm Post subject: [C++] OpenProcess function w/ process name? |
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I tried coding a function for OpenProcess that takes the process name, but it doesn't work.
Any help here?
| Code: | HANDLE OpenProcessByName(TCHAR * szProcessName)
{
DWORD access = PROCESS_TERMINATE | PROCESS_CREATE_THREAD | PROCESS_SET_SESSIONID |
PROCESS_VM_OPERATION | PROCESS_VM_WRITE | PROCESS_DUP_HANDLE |
PROCESS_CREATE_PROCESS | PROCESS_SET_QUOTA | PROCESS_SET_INFORMATION |
PROCESS_QUERY_INFORMATION | PROCESS_SUSPEND_RESUME | PROCESS_VM_READ |
SYNCHRONIZE;
DWORD pID;
HANDLE hSnapshot = CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS, NULL);
PROCESSENTRY32 pe32;
pe32.dwSize = sizeof(PROCESSENTRY32);
Process32First(hSnapshot, &pe32);
do {
if (wcscmp(pe32.szExeFile, szProcessName) == 0)
{
pID = pe32.th32ProcessID;
CloseHandle(hSnapshot);
return OpenProcess(access, FALSE, pID);
}
} while (Process32Next(hSnapshot, &pe32));
CloseHandle(hSnapshot);
return NULL;
} |
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atom0s
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| Posted: Mon Jun 09, 2008 10:53 pm Post subject: |
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Probably has to do with your access. Along with that, if you are using TCHAR, you should make sure of the TCHAR functions when comparing strings and such. Heres a redone function I wrote to do what you want:
| Code: | HANDLE _OpenProcess( TCHAR* tszProcName )
{
// Add access as needed... This should be enough for the basics..
DWORD dwAccess = PROCESS_QUERY_INFORMATION|PROCESS_VM_OPERATION|PROCESS_VM_READ|PROCESS_VM_WRITE;
HANDLE hHandle = NULL;
PROCESSENTRY32 pe32 = {0};
hHandle = CreateToolhelp32Snapshot( TH32CS_SNAPPROCESS, 0 );
if( hHandle == INVALID_HANDLE_VALUE || hHandle == NULL )
return INVALID_HANDLE_VALUE;
pe32.dwSize = sizeof( PROCESSENTRY32 );
if( !Process32First( hHandle, &pe32 ) )
{
CloseHandle( hHandle );
return INVALID_HANDLE_VALUE;
}
while( Process32Next( hHandle, &pe32 ) )
{
if( _tcsncicmp( tszProcName, pe32.szExeFile, _tcslen( tszProcName ) ) == 0 )
{
CloseHandle( hHandle );
return OpenProcess( dwAccess, FALSE, pe32.th32ProcessID );
}
}
CloseHandle( hHandle );
return INVALID_HANDLE_VALUE;
} |
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Cx
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| Posted: Tue Jun 10, 2008 8:47 am Post subject: |
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For some reason, Wiccaan's works but yours, Irwin, doesn't. Haven't checked why yet though, I have to leave.
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atom0s
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| Posted: Tue Jun 10, 2008 1:22 pm Post subject: |
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His fails because of using PROCESS_ALL_ACCESS without adjusting the debug token. You can adjust that using:
| Code: | BOOL EnablePrivilege(LPCTSTR lpszPrivilegeName, BOOL bEnable)
{
HANDLE hToken;
TOKEN_PRIVILEGES tp;
LUID luid;
BOOL ret;
if (!OpenProcessToken(GetCurrentProcess(), TOKEN_ADJUST_PRIVILEGES | TOKEN_QUERY | TOKEN_READ, &hToken))
return FALSE;
if (!LookupPrivilegeValue(NULL, lpszPrivilegeName, &luid))
return FALSE;
tp.PrivilegeCount = 1;
tp.Privileges[0].Luid = luid;
tp.Privileges[0].Attributes = bEnable ? SE_PRIVILEGE_ENABLED : 0;
ret = AdjustTokenPrivileges(hToken, FALSE, &tp, sizeof(tp), NULL, NULL);
CloseHandle(hToken);
return ret;
} |
Just call it before you attempt to open the process handle using:
| Code: | | EnablePrivilege(SE_DEBUG_NAME, TRUE); |
And you can reset it when you are done using FALSE as the second param.
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oib111
I post too much
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| Posted: Tue Jun 10, 2008 2:59 pm Post subject: |
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Lol. I can't believe I actually knew that was why it was messing up. Btw, is every program like that (where you have to change debug tokens for PROCESS_ALL_ACCESS to work)? And btw, what is a token/token privilege, and a LUID?
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Noz3001
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| Posted: Tue Jun 10, 2008 3:27 pm Post subject: |
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| It's very strange that PROCESS_ALL_ACCESS doesn't work. It's always worked for me.
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Cx
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| Posted: Tue Jun 10, 2008 5:20 pm Post subject: |
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| noz3001 wrote: | | It's very strange that PROCESS_ALL_ACCESS doesn't work. It's always worked for me. |
Never has worked for me.
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atom0s
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Cx
Master Cheater
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Joined: 27 Jul 2007
Posts: 367
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| Posted: Wed Jun 11, 2008 6:08 pm Post subject: |
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Told ya Irwin.
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