【发布时间】:2018-11-25 16:59:43
【问题描述】:
我想等待进程执行结束 (calc.exe) 但它不起作用。 我的程序快速/现在完成,而我的进程(calc.exe)继续运行(我没有停止它)。
WaitForSingleObject 立即返回 WAIT_OBJECT_0。
ps:我禁用了我的软件防病毒 (AVIRA)
int main(int argc, char** arv)
{
STARTUPINFO si;
PROCESS_INFORMATION pi;
ZeroMemory(&si, sizeof(si));
si.cb = sizeof(si);
ZeroMemory(&pi, sizeof(pi));
const char * calcPrgm = "C:\\\\Windows\\System32\\calc.exe";
LPSTR calcPrgmLpstr = const_cast<LPSTR>(calcPrgm);
// Start the child process.
if (!CreateProcess(NULL, // No module name (use command line)
calcPrgmLpstr, // Command line
NULL, // Process handle not inheritable
NULL, // Thread handle not inheritable
FALSE, // Set handle inheritance to FALSE
0, // No creation flags
NULL, // Use parent's environment block
NULL, // Use parent's starting directory
&si, // Pointer to STARTUPINFO structure
&pi) // Pointer to PROCESS_INFORMATION structure
)
{
printf("CreateProcess failed (%d).\n", GetLastError());
return -1;
}
// Wait until child process exits.
auto ret = WaitForSingleObject(pi.hProcess, INFINITE);
printf("WaitForSingleObject ret = %x\n", ret);
if (ret == WAIT_OBJECT_0)
{
printf("WaitForSingleObject ret ret == WAIT_OBJECT_0\n");
}
BOOL b = FALSE;
DWORD n = 0;
b = GetExitCodeProcess(pi.hProcess, &n);
// Close process and thread handles.
CloseHandle(pi.hProcess);
CloseHandle(pi.hThread);
printf("WaitForSingleObject end\n");
return 0;
}
【问题讨论】:
-
好的,我看到你从 MSDN docs.microsoft.com/en-gb/windows/desktop/ProcThread/… 解除了这个问题,所以它无法创建进程吗? getlasterror 返回什么,
retWAIT_OBJECT_0 是什么? -
这当然是工作。
calc.exe已退出。但在此之前它执行Calculator.exe -
当
WaitForSingleObject为WAIT_OBJECT_0返回pi.hProcess- 进程真的退出了。你没有考虑到你查看了另一个进程 -
要等待一系列进程,请使用Job object。默认情况下,当父进程产生子进程时,子进程会被添加到父进程所属的同一个 Job 中。因此,创建一个 Job,将
calc.exe进程添加到其中,然后等待 Job。当calc.exe和Calculator.exe都退出时,作业将发出信号。见How do I wait until all processes in a job have exited?
标签: c++ winapi process win32-process waitforsingleobject