C/C++ small tool for traversing processes and process IDs-C#.Net Tutorial-php.cn

C/C++ small tool for traversing processes and process IDs

黄舟

Release： 2017-01-22 14:06:07

Original

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When we write some destructive programs, we need to traverse the process and extract the ID

For the above functions, we first introduce several APIs

1.CreateToolhelp32Snapshout function

Get a snapshot of a process, module or thread

The syntax is as follows:

HANDLE WINAPI CreateToolhelp32Snapshot(  
  _In_ DWORD dwFlags,  
  _In_ DWORD th32ProcessID  
);

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The first parameter: the snapshot contains part of the system , the parameters are as follows:

C/C++ small tool for traversing processes and process IDs

#We use TH32CS_SNAPPROCESS

snapshot included here All processes in the system.

The second one is about the PROCESSENTRY32 structure

The syntax is as follows:

typedef struct tagPROCESSENTRY32 {  
  DWORD     dwSize;  
  DWORD     cntUsage;  
  DWORD     th32ProcessID;  
  ULONG_PTR th32DefaultHeapID;  
  DWORD     th32ModuleID;  
  DWORD     cntThreads;  
  DWORD     th32ParentProcessID;  
  LONG      pcPriClassBase;  
  DWORD     dwFlags;  
  TCHAR     szExeFile[MAX_PATH];  
} PROCESSENTRY32, *PPROCESSENTRY32;

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This describes an entry, which is used as a snapshot When called, the process in the system address space is read.

Only szExeFile[MAX_PATH] and

th32ParentProcessID are introduced here: This is the identity of the process (parent process) after the process is created

szExeFile: The name of the executable file in the process

The following is the source code! Some functions are not explained, but you can understand them through comments or literal meaning

#include <Windows.h>  
#include <stdio.h>  
#include <TlHelp32.h>  
  
int main()  
{  
    HANDLE hProceessnap = CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS, 0);  
    if (hProceessnap == INVALID_HANDLE_VALUE)  
    {  
        printf_s("创建进行快照失败\n");  
        return -1;  
    }  
    else  
    {  
        PROCESSENTRY32 pe32;  
        pe32.dwSize = sizeof(pe32);  
        BOOL hProcess = Process32First(hProceessnap, &pe32);  
        char buff[1024];  
        while (hProcess)  
        {  
            wsprintf(buff, "进程名：%s--------------------进程ID：%d", pe32.szExeFile, pe32.th32ParentProcessID);  
            printf_s("%s\n", buff);  
            memset(buff, 0x00, 1024);  
            hProcess = Process32Next(hProceessnap, &pe32);  
        }  
    }  
    CloseHandle(hProceessnap);  
  
    return 0;  
}

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The running results are as follows

C/C++ small tool for traversing processes and process IDs

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