使用boost::process调用外部程序会导致调用者挂起(Linux)

#include <boost/process.hpp>
#include <boost/asio.hpp>

void run_external_program() {
    boost::asio::io_service ios;
    boost::process::child c("your_program", boost::process::std_out > stdout, ios);

    // 异步等待子进程结束
    c.async_wait([&](const boost::system::error_code& ec, int exit_code) {
        if (!ec) {
            std::cout << "Program exited with code " << exit_code << std::endl;
        } else {
            std::cerr << "Error: " << ec.message() << std::endl;
        }
    });

    // 运行 io_service 直到所有工作完成
    ios.run();
}

#include <boost/process.hpp>
#include <iostream>

void run_external_program() {
    boost::process::ipstream pipe_stream;
    boost::process::child c("your_program", boost::process::std_out > pipe_stream);

    std::string line;
    while (pipe_stream && std::getline(pipe_stream, line) && !line.empty()) {
        std::cout << line << std::endl;
    }

    c.wait(); // 等待子进程结束
}

#include <boost/process.hpp>
#include <boost/asio/steady_timer.hpp>

void run_external_program_with_timeout() {
    boost::asio::io_service ios;
    boost::process::child c("your_program", boost::process::std_out > stdout, ios);

    boost::asio::steady_timer timer(ios, boost::asio::chrono::seconds(10));
    timer.async_wait([&](const boost::system::error_code& ec) {
        if (!ec) {
            c.terminate(); // 超时后终止子进程
            std::cerr << "Program execution timed out." << std::endl;
        }
    });

    ios.run();
    c.wait(); // 等待子进程结束
}