windows c++ (3) windows获取进程PID、进程路径、进程启停及文件相关操作
1、windows下获取PID
windows下获取PID比较简单，可以直接通过TlHelp32.h内的Process32First + Process32Next来遍历进程获取PROCESSENTRY32（存放快照进程信息的一个结构体）结构体信息，对比进程名称获取对应的PID。
调用以上方法记得先 #include
PROCESSENTRY32解析：
typedef struct tagPROCESSENTRY32
{
DWORD dwSize;
DWORD cntUsage;
DWORD th32ProcessID; // this process
ULONG_PTR th32DefaultHeapID;
DWORD th32ModuleID; // associated exe
DWORD cntThreads;
DWORD th32ParentProcessID; // this process's parent process
LONG pcPriClassBase; // Base priority of process's threads
DWORD dwFlags;
CHAR szExeFile[MAX_PATH]; // Path
} PROCESSENTRY32;
| 成员 | 解析 |
|---|---|
| dwSize | 结构体的大小 |
| cntUsage | 此进程的引用计数（已经不再被使用，总是设置为零） |
| th32ProcessID | 进程ID（我们需要的pid） |
| th32DefaultHeapID | 进程默认堆ID（已经不再被使用，总是设置为零） |
| th32ModuleID | 进程模块ID（已经不再被使用，总是设置为零） |
| cntThreads | 此进程开启的线程计数 |
| th32ParentProcessID | 父进程的ID |
| pcPriClassBase | 线程优先权 |
| dwFlags | 已经不再被使用 |
| szExeFile | 进程的可执行文件名称。要获得可执行文件的完整路径，应调用Module32First函数，再检查其返回的MODULEENTRY32结构的szExePath成员。但是，如果被调用进程是一个64位程序，您必须调用QueryFullProcessImageName函数去获取64位进程的可执行文件完整路径名 |
实现
/*
brief：*获取进程PID
parm1: 进程名称
ret: 成功->进程PID
失败->-1
*/
int getPidByName(const char* processName )
{
HANDLE hSnapshot;
PROCESSENTRY32 lppe;
BOOL Found;
hSnapshot = CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS, 0);
lppe.dwSize = sizeof(PROCESSENTRY32);
Found = Process32First(hSnapshot, &lppe);
char mProce[MAX_PATH] = "";
int pid = -1;
while (Found)
{
strcpy(mProce, processName);
strcat(mProce, ".exe");
if (strcmp(mProce, lppe.szExeFile) == 0)//进程名比较
{
Found = TRUE;
pid = lppe.th32ProcessID;
break;
}
Found = Process32Next(hSnapshot, &lppe);//得到下一个进程
}
CloseHandle(hSnapshot);
return pid;
}
2、获取进程路径
实现
#define MAX_PATH 256
/*
brief：*获取进程的完整路径，支持xp、win7、win10系统
parm1: 进程PID
parm2: 进程路径指针（返回值）
parm3: 路径长度
ret: null
*/
void GetProcessPath(DWORD nPID, char* szPathName, int pathlen)
{
DWORD dwMajorVersion = 0;
DWORD dwMinorVersion = 0;
OSVERSIONINFOEX osver = { 0 };
osver.dwOSVersionInfoSize = sizeof(osver);
::GetVersionEx((OSVERSIONINFO*)&osver);
dwMajorVersion = osver.dwMajorVersion;
dwMinorVersion = osver.dwMinorVersion;
//打开进程
//dwPID,进程ID
char szFileName[MAX_PATH] = {0};//文件名
HANDLE hProcess = NULL;
HMODULE hModule = NULL;
DWORD cbReturn = 0;
hProcess=OpenProcess(PROCESS_QUERY_INFORMATION|PROCESS_VM_READ,//访问权限，win7以上系统需要提升权限EnablePrivilege
false,//是否允许得到的进程句柄被后创建的子进程继承
nPID);//进程ID
DWORD dwError = 0;
//BOOL bSuccessProcess = pEnumProcessModules(hProcess,&hModule,sizeof(hModule),&cbReturn);
BOOL bSuccessProcess = EnumProcessModules(hProcess, &hModule, sizeof(hModule), &cbReturn);
if (!bSuccessProcess)
{
dwError = GetLastError();
}
memset(szFileName, 0, sizeof(szFileName));
memset(szPathName, 0, pathlen);
if (hModule != NULL)
{
//获得进程模块文件名(包含路径)
if (dwMajorVersion < 5) //2000
{
//保存文件名
DWORD dwGetModuleBaseName = GetModuleFileNameEx(hProcess, hModule, szPathName, pathlen);
}
if (dwMajorVersion == 5) //x或Windows Server2003
{
GetProcessImageFileName(hProcess, szPathName, pathlen);
}
else if (osver.dwMajorVersion >= 6) //win7或win7以上
{
DWORD dwPathNameSize = pathlen;
bSuccessProcess = QueryFullProcessImageName(hProcess, 0, szPathName, &dwPathNameSize);
}
if (!bSuccessProcess)
{
dwError = GetLastError();
}
}
if(hProcess)
CloseHandle(hProcess);
}
3、进程启停
启动实现
/*
brief：开始进程
parm1: 进程名称
parm2: 附带参数长度
parm3: 附带参数
ret: 成功->进程PID
失败->-1
*/
int startProc(const char* name,int argc = 0,char* param[] = NULL);
int startProc(const char* name,int argc,char* param[])
{
std::string strPath = m_ProcessPath + name;
PROCESS_INFORMATION pi;
STARTUPINFO si = {sizeof(si)};
DWORD dwExitCode;
HANDLE h_MapGeneralArea;
char cCommand[MAX_PATH] = {0};
sprintf_s(cCommand,"%s.exe",strPath.c_str());
for (int i = 0;i<argc;i++)
{
sprintf_s(cCommand,"%s %s",cCommand,param[i]);
}
//隐藏程序 DOS 窗口
si.cb = sizeof(si);
si.dwFlags = STARTF_USESHOWWINDOW;
si.wShowWindow = SW_HIDE;
BOOL ret = CreateProcess(NULL, cCommand, NULL, NULL, FALSE, 0, NULL, NULL, &si, &pi);
if (ret){
return pi.dwProcessId;
}
else{
return -1;
}
}
停止实现
/*
brief：停止进程
parm1: 进程id
ret: null
*/
void CProcessCtrl::stopProc( int pid )
{
//killprocess
HANDLE hProcess = OpenProcess(PROCESS_ALL_ACCESS,FALSE,pid);
if (hProcess != NULL)
{
if(TerminateProcess(hProcess,0))
CloseHandle(hProcess);
else
{
LPVOID lpMsgBuf;
FormatMessage(
FORMAT_MESSAGE_ALLOCATE_BUFFER |
FORMAT_MESSAGE_FROM_SYSTEM |
FORMAT_MESSAGE_IGNORE_INSERTS,
NULL,
GetLastError(),
MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
(LPTSTR) &lpMsgBuf,
0,
NULL);
LocalFree(lpMsgBuf);
}
}
}
4、文件操作
文件的操作网上很多，这里写下文件夹的拷贝删除
拷贝实现
//显示文件拷贝时的进度条
BOOL CopyFolder(LPCTSTR lpszFromPath,LPCTSTR lpszToPath)
{
int nLengthFrm = strlen(lpszFromPath);
char *NewPathFrm = new char[nLengthFrm+2];
strcpy(NewPathFrm,lpszFromPath);
NewPathFrm[nLengthFrm] = '\0';
NewPathFrm[nLengthFrm+1] = '\0';
SHFILEOPSTRUCT FileOp;
ZeroMemory((void*)&FileOp,sizeof(SHFILEOPSTRUCT));
FileOp.fFlags = FOF_NOCONFIRMATION ;
FileOp.hNameMappings = NULL;
FileOp.hwnd = NULL;
FileOp.lpszProgressTitle = NULL;
FileOp.pFrom = NewPathFrm;
FileOp.pTo = lpszToPath;
FileOp.wFunc = FO_COPY;
int ret = SHFileOperation(&FileOp);
char errdat[128];
sprintf(errdat,"拷贝文件出错，错误码：%d",ret);
if (ret!=0)
{
DPLOG_INFO("拷贝文件",errdat);
Sleep(100);
delete []NewPathFrm;
return FALSE;
}
Sleep(100);
delete []NewPathFrm;
return TRUE;
}
删除实现
//删除文件或者文件夹
BOOL MyDeleteFile(char* lpszPath)
{
SHFILEOPSTRUCT shDelFile;
memset(&shDelFile,0,sizeof(SHFILEOPSTRUCT));
shDelFile.fFlags |= FOF_SILENT; // don't report progress
shDelFile.fFlags |= FOF_NOERRORUI; // don't report errors
shDelFile.fFlags |= FOF_NOCONFIRMATION; // don't confirm delete
// Copy pathname to double-NULL-terminated string.
//
TCHAR buf[_MAX_PATH + 1] = {0}; // allow one more character
_tcscpy(buf, lpszPath); // copy caller's pathname
buf[_tcslen(buf)+1]=0; // need two NULLs at end
// Set SHFILEOPSTRUCT params for delete operation
shDelFile.wFunc = FO_DELETE; // REQUIRED: delete operation
shDelFile.pFrom = buf; // REQUIRED: which file(s)
//shDelFile.pFrom = "C:\\work\\云卡口前端管理系统\\FMCloud(XListCtrl)\\Debug\\Controller3\0\0";
shDelFile.pTo = NULL; // MUST be NULL
{ // otherwise..
shDelFile.fFlags |= FOF_ALLOWUNDO; // ..send to Recycle Bin
}
int retval = SHFileOperation(&shDelFile);
return retval == 0;
}