用linux系统调用杀死c++中的sh -c及其所有子进程。

#include <iostream>
#include <sys/types.h>
#include <sys/wait.h>
#include <unistd.h>
#include <signal.h>
#include <vector>
#include <cstring>
#include <sstream>
#include <fstream>

// 获取给定进程的所有子进程
std::vector<pid_t> getChildProcesses(pid_t pid) {
    std::vector<pid_t> childPids;
    std::ifstream proc("/proc/" + std::to_string(pid) + "/task/" + std::to_string(pid) + "/children");
    if (proc) {
        std::string line;
        std::getline(proc, line);
        std::istringstream iss(line);
        pid_t childPid;
        while (iss >> childPid) {
            childPids.push_back(childPid);
        }
    }
    return childPids;
}

// 递归杀死进程及其所有子进程
void killProcessTree(pid_t pid) {
    std::vector<pid_t> childPids = getChildProcesses(pid);
    for (pid_t childPid : childPids) {
        killProcessTree(childPid);
    }
    kill(pid, SIGKILL);
}

int main() {
    pid_t pid = fork();
    if (pid == 0) {
        // 子进程
        execl("/bin/sh", "sh", "-c", "sleep 100", (char *)NULL);
        // 如果 execl 失败
        std::cerr << "execl failed: " << strerror(errno) << std::endl;
        return 1;
    } else if (pid > 0) {
        // 父进程
        std::cout << "Started process with PID: " << pid << std::endl;
        sleep(5); // 等待一段时间，模拟一些操作

        // 杀死进程及其所有子进程
        killProcessTree(pid);
        std::cout << "Killed process tree with root PID: " << pid << std::endl;

        // 等待子进程结束
        waitpid(pid, NULL, 0);
    } else {
        // fork 失败
        std::cerr << "fork failed: " << strerror(errno) << std::endl;
        return 1;
    }

    return 0;
}