Unix / C ++：打开新终端并将输出重定向到它 [英] Unix/C++: Open new terminal and redirect output to it

问题描述

我的程序（Solaris 10上的C ++）从shell启动时，通过wcout将输出写入其终端。但是当我在Sun Studio中执行它时，或者文件管理器没有终端，输出将出现在Sun Studio输出窗口或者根本没有。

My program (C++ on Solaris 10) writes output via wcout to its terminal when it is started from a shell. But when I execute it from within Sun Studio or the file manager is does not have a terminal and the ouput appears in the Sun Studio output window or nowhere at all.

希望它在三种情况中的任何一种情况下打开自己的终端窗口，并将wcout附加到此终端窗口。我想这是做程序本身与C ++系统调用，而不是通过某种方式如何从一些shell或脚本执行程序。因为然后在Studio IDE中执行并在文件管理器中双击仍然会有相同的效果。

I would like it to open its own terminal window in any of the three cases and attach wcout to this terminal window. I want this to be done be the program itself with C++ system calls not by the way how the program is executed from some shell or script. Because then execution in the Studio IDE and double-click in the file manager would still have the same effect.

作为一个Windows程序员，我觉得很自然，没有找到这是如何做在我的Unix书籍或在网络。

Being a Windows programmer that seems quite natural to me but I could not find out how this is done in my Unix books nor in the web. Am I requesting the wrong thing, is it really so hard to do or am I missing something?

推荐答案

以下是接近于你要什么。它仍然有一些错误：

The following is close to what you want. It still has a few bugs:

• xterm不能正常关闭（当程序终止时关闭）。我不知道为什么会这样。


• 在输出之前，输出一个数字。再次，我不知道为什么。


• 我似乎无法重定向输入。

也许别人知道如何修复这些错误（以及任何其他我可能没有注意到的）。

Maybe someone else know how to fix those bugs (and any others I might not have noticed).

#include <stdlib.h>
#include <fcntl.h>
#include <string.h>
#include <unistd.h>
#include <iostream>
#include <sstream>

int main()
{
  int pt = posix_openpt(O_RDWR);
  if (pt == -1)
  {
    std::cerr << "Could not open pseudo terminal.\n";
    return EXIT_FAILURE;
  }
  char* ptname = ptsname(pt);
  if (!ptname)
  {
    std::cerr << "Could not get pseudo terminal device name.\n";
    close(pt);
    return EXIT_FAILURE;
  }

  if (unlockpt(pt) == -1)
  {
    std::cerr << "Could not get pseudo terminal device name.\n";
    close(pt);
    return EXIT_FAILURE;
  }

  std::ostringstream oss;
  oss << "xterm -S" << (strrchr(ptname, '/')+1) << "/" << pt << " &";
  system(oss.str().c_str());

  int xterm_fd = open(ptname,O_RDWR);
  char c;
  do read(xterm_fd, &c, 1); while (c!='\n');

  if (dup2(pt, 1) <0)
  {
    std::cerr << "Could not redirect standard output.\n";
    close(pt);
    return EXIT_FAILURE;
  }
  if (dup2(pt, 2) <0)
  {
    std::cerr << "Could not redirect standard error output.\n";
    close(pt);
    return EXIT_FAILURE;
  }

  std::cout << "This should appear on the xterm." << std::endl;
  std::cerr << "So should this.\n";
  std::cin.ignore(1);

  close(pt);
  return EXIT_SUCCESS;
}

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