Process List

This is a discussion on Process List within the Windows Programming forums, part of the Platform Specific Boards category; To start with, I'm basically looking to printf the current processes (windows) to the console. Preferably something like this: Code: ...

  1. #1
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    Process List

    To start with, I'm basically looking to printf the current processes (windows) to the console.
    Preferably something like this:

    Code:
    for (int i = 0; i < numOfProcs; i++)
    printf("%s", process)
    I know you have to enumerate the processes somehow, but I couldn't find any existing sources to take a look at.

    Thanks in advance.

  2. #2
    and the hat of wrongness Salem's Avatar
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    I'm using the following code to do as I wanted but it only shows the names of 32 bit processes. The 64 bit ones return as <unknown>. Oh and the PIDs are printed fine.

    Code:
    #pragma comment(lib, "Psapi.lib") 
    #include <windows.h>
    #include <stdio.h>
    #include <tchar.h>
    #include <psapi.h>
    
    void PrintProcessNameAndID( DWORD processID )
    {
        TCHAR szProcessName[MAX_PATH] = TEXT("<unknown>");
        HANDLE hProcess = OpenProcess( PROCESS_QUERY_INFORMATION |
                                       PROCESS_VM_READ,
                                       FALSE, processID );
        if (NULL != hProcess )
        {
            HMODULE hMod;
            DWORD cbNeeded;
            if ( EnumProcessModules( hProcess, &hMod, sizeof(hMod), 
                 &cbNeeded) )
            {
                GetModuleBaseName( hProcess, hMod, szProcessName, 
                                   sizeof(szProcessName)/sizeof(TCHAR) );
            }
        }
        _tprintf( TEXT("%s  (PID: %u)\n"), szProcessName, processID );
        CloseHandle( hProcess );
    }
    
    int main()
    {
        DWORD aProcesses[1024], cbNeeded, cProcesses;
        unsigned int i;
    	if ( !EnumProcesses( aProcesses, sizeof(aProcesses), &cbNeeded ) ) {
            return 0;
    	}
        cProcesses = cbNeeded / sizeof(DWORD);
    	for ( i = 0; i < cProcesses; i++ ) {
    		if( aProcesses[i] != 0 ) {
    			PrintProcessNameAndID( aProcesses[i] );
    		}
    	}
    	getchar();
    	return 0;
    }
    Last edited by david84; 09-06-2010 at 12:48 PM.

  4. #4
    a_capitalist_story
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    A little more investigation on your part, after copying and pasting the MSDN example, would have perhaps led you here, where it states:
    To control whether a 64-bit application enumerates 32-bit modules, 64-bit modules, or both types of modules, use the EnumProcessModulesEx function.
    So you need to modify the MSDN sample code accordingly.

  5. #5
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    Quote Originally Posted by rags_to_riches View Post
    A little more investigation on your part, after copying and pasting the MSDN example, would have perhaps led you here, where it states:


    So you need to modify the MSDN sample code accordingly.
    Thanks for the response; and I apologize for my lack of reseach. Below is what I have currently.

    I've also tried setting the value of dwFilterFlag to 0x02, LIST_MODULES_64BIT & LIST_MODULES_ALL. None of which have changed the output: it still can only find the 32 bit processes. Are they all invalid values to assign to dwFilterFlag?


    Code:
    #pragma comment(lib, "Psapi.lib") 
    #include <windows.h>
    #include <stdio.h>
    #include <tchar.h>
    #include <psapi.h>
    
    void PrintProcessNameAndID( DWORD processID )
    {
        TCHAR szProcessName[MAX_PATH] = TEXT("<unknown>");
        HANDLE hProcess = OpenProcess( PROCESS_QUERY_INFORMATION |
                                       PROCESS_VM_READ,
                                       FALSE, processID );
    	HANDLE hProc; 
    	DWORD dwFilterFlag = 0x03;
        if (NULL != hProcess )
        {
            HMODULE hMod;
            DWORD cbNeeded;
            if ( EnumProcessModulesEx( hProcess, &hMod, sizeof(hMod), 
                 &cbNeeded, dwFilterFlag) )
            {
                GetModuleBaseName( hProcess, hMod, szProcessName, 
                                   sizeof(szProcessName)/sizeof(TCHAR) );
            }
        }
    
    	_tprintf( TEXT("%s  (PID: %u).\n"), szProcessName, processID );
        CloseHandle( hProcess );
    }
    
    int main()
    {
        DWORD aProcesses[1024], cbNeeded, cProcesses;
        unsigned int i;
    	if ( !EnumProcesses( aProcesses, sizeof(aProcesses), &cbNeeded ) ) {
            return 0;
    	}
        cProcesses = cbNeeded / sizeof(DWORD);
    	for ( i = 0; i < cProcesses; i++ ) {
    		if( aProcesses[i] != 0 ) {
    			PrintProcessNameAndID( aProcesses[i] );
    		}
    	}
    	getchar();
    	return 0;
    }
    Last edited by david84; 09-06-2010 at 05:13 PM.

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