在C++中安全地终止子进程可以使用以下方法：
使用waitpid()函数来等待子进程终止并收集其退出状态。可以在父进程中调用waitpid()函数来等待子进程的终止，确保子进程已经正常退出。这样可以避免僵尸进程的产生。示例代码：
#include <iostream>#include <unistd.h>#include <sys/wait.h>int main() { pid_t pid = fork(); if (pid == 0) { // 子进程逻辑 std::cout << "Child process is running" << std::endl; // 子进程终止 exit(0); } else if (pid > 0) { // 父进程逻辑 std::cout << "Parent process is waiting for child process to terminate" << std::endl; int status; waitpid(pid, &status, 0); std::cout << "Child process has terminated with status: " << status << std::endl; } else { std::cerr << "Fork failed" << std::endl; } return 0;}示例代码：
#include <iostream>#include <unistd.h>#include <signal.h>void sigchld_handler(int signal) { int status; pid_t pid = waitpid(-1, &status, WNOHANG); std::cout << "Child process " << pid << " terminated with status: " << status << std::endl;}int main() { signal(SIGCHLD, sigchld_handler); pid_t pid = fork(); if (pid == 0) { // 子进程逻辑 std::cout << "Child process is running" << std::endl; // 子进程终止 exit(0); } else if (pid > 0) { // 父进程逻辑 std::cout << "Parent process is waiting for child process to terminate" << std::endl; while(1) { // 父进程持续运行 } } else { std::cerr << "Fork failed" << std::endl; } return 0;}这些方法可以确保在C++中安全地终止子进程，避免产生僵尸进程并正确处理子进程的退出状态。
