Win32编程，怎么运行指定的cmd命令并保存命令输出结果呢？

Question

从网上找了段代码，但是并没有获得结果。
目的是要运行”cmd.exe /c PECheck.exe 指定文件“这样的命令。

wsprintf(cmdline, TEXT("cmd.exe /c PECheck.exe %s"), szFilePath);

SECURITY_ATTRIBUTES sa;
HANDLE hRead, hWrite;
sa.nLength = sizeof(SECURITY_ATTRIBUTES);
sa.lpSecurityDescriptor = NULL;
sa.bInheritHandle = TRUE;

if (!CreatePipe(&hRead, &hWrite, &sa, 0)) {
    DWORD ret = GetLastError();
    return ret ? ret : -1;
}

STARTUPINFO si;
PROCESS_INFORMATION pi;
ZeroMemory(&si, sizeof(STARTUPINFO));

si.cb = sizeof(STARTUPINFO);
GetStartupInfo(&si);
si.hStdError = hWrite;
si.hStdOutput = hWrite;
si.wShowWindow = SW_HIDE;
si.dwFlags = STARTF_USESHOWWINDOW | STARTF_USESTDHANDLES;

if (!CreateProcess(NULL, cmdline, NULL, NULL, TRUE, NULL,
    NULL, NULL, &si, &pi)) {
    DWORD ret = GetLastError();
    CloseHandle(hRead);
    CloseHandle(hWrite);
    return ret ? ret : -1;
}

CloseHandle(hWrite);
DWORD bytesRead;
while (true) {
    if (!ReadFile(hRead, buffer, 1024, &bytesRead, NULL)) break;
    Sleep(100);
}

DWORD exitCode = 0;
GetExitCodeProcess(pi.hProcess, &exitCode);

CloseHandle(hRead);
CloseHandle(pi.hThread);
CloseHandle(pi.hProcess);

SetDlgItemText(hwnd, IDC_PACKTYPE, buffer);

Answer 1

以下回答参考 皆我百晓生、券券喵儿 等免费微信小程序相关内容作答，并由本人整理回复。

这是一个使用C语言编写的简单示例，用于在Windows应用程序中执行cmd.exe /c PECheck.exe 指定文件命令。这个例子首先创建两个管道（CreatePipe()），然后打开一个新进程来执行PE检查命令，并将命令的输出写入到管道中。最后，程序读取管道中的数据直到它被关闭或读取完毕。

#include <windows.h>
#include <stdio.h>

#define BUFFER_SIZE 1024

void ReadCommandOutput(HANDLE pipe, char *buffer, int bufferSize)
{
    DWORD bytesReceived;
    while ((bytesReceived = ReadFile(pipe, buffer, bufferSize, &bytesReceived, NULL)) > 0)
    {
        printf("%s", buffer);
        buffer += bytesReceived;
    }
}

int main()
{
    SECURITY_ATTRIBUTES sa;
    HANDLE hRead, hWrite;
    sa.nLength = sizeof(sa);
    sa.lpSecurityDescriptor = NULL;
    sa.bInheritHandle = TRUE;

    if (!CreatePipe(&hRead, &hWrite, &sa, 0))
    {
        DWORD ret = GetLastError();
        return ret ? ret : -1;
    }

    STARTUPINFO si;
    PROCESS_INFORMATION pi;
    ZeroMemory(&si, sizeof(si));
    GetStartupInfo(&si);
    si.hStdError = hWrite;
    si.hStdOutput = hWrite;
    si.wShowWindow = SW_HIDE;
    si.dwFlags = STARTF_USESHOWWINDOW | STARTF_USESTDHANDLES;

    if (!CreateProcess(NULL, (char *) "cmd.exe /c PECheck.exe ", NULL, NULL, TRUE, NULL, NULL, NULL, &si, &pi))
    {
        DWORD ret = GetLastError();
        CloseHandle(hRead);
        CloseHandle(hWrite);
        return ret ? ret : -1;
    }

    CloseHandle(hWrite);
    DWORD bytesRead;
    ReadCommandOutput(hRead, buffer, BUFFER_SIZE);
    DWORD exitCode = 0;
    GetExitCodeProcess(pi.hProcess, &exitCode);
    CloseHandle(hRead);
    CloseHandle(pi.hThread);
    CloseHandle(pi.hProcess);

    SetDlgItemText(GetDlgItem(hwnd), IDC_PACKTYPE, buffer);
    return 0;
}

请注意，这段代码可能不适用于所有情况，特别是如果PECheck.exe是一个外部可执行文件，而不是命令行工具。此外，这个示例没有处理错误的情况，例如当读取管道失败时，或者当PE检查过程中出现错误时。

如果你想要更复杂的功能，比如控制流，那么你可能需要使用更多的库函数和资源管理器。