c++ - 与Boost中的dup2类似的功能

Question

我想做这样的事情

acceptSocket = accept(...);
if (fork() == 0) {
  // ..
  dup2(acceptSocket, 1);
  dup2(acceptSocket, 2);
  execvp(/*some command*/);
  
}

现在我要转向C++ boost，我想做同样的事情。有没有类似的东西？可能是Boost Process和套接字流，但我不太清楚。提前致谢。

Answer 1

您可以使用Boost Process:https://www.boost.org/doc/libs/1_74_0/doc/html/boost/process/posix/fd.html

This property lets you modify file-descriptors other than the standardones (0,1,2).

It provides the functions bind, which implements dup2 and close.

因此，例如:

#include <boost/process.hpp>

namespace bp = boost::process;
using bp::posix::fd;

int main() {
    int acceptSocket /* = accept(...) */;

    bp::child child(
        bp::search_path("someprogram.exe"),
        fd.bind(1, acceptSocket),
        fd.bind(2, acceptSocket));

    child.wait();
}