如何将终端切换到使用 NSTask 启动的进程的新子进程？
我使用此处描述的方法制作了一个伪终端： http://lists .apple.com/archives/student-dev/2005/Mar/msg00019.html
终端本身运行良好。无论如何，问题是终端无法切换到子进程。例如，我使用 NSTask 启动了 bash，如果我在 bash 中执行 ftp，它会自动停止。
ftp
ftp
ftp>
[1]+ Stopped ftp
bash-3.2$
如果我尝试使用 fg 继续 ftp，它会安静地终止。 （我用活动监视器检查了这一点）
fg
fg
ftp
bash-3.2$
fg
fg
bash: fg: current: no such job
bash-3.2$
我认为它需要更多的基础设施（完成伪终端）来将控制权切换到子进程。这样做需要什么？
I made a pseudo terminal with method described here: http://lists.apple.com/archives/student-dev/2005/Mar/msg00019.html
The terminal itself worked well. Anyway the problem is terminal cannot being switched to child process. For an example, I launched bash with NSTask, and if I execute ftp within the bash, it stops automatically.
ftp
ftp
ftp>
[1]+ Stopped ftp
bash-3.2$
And if I try to continue the ftp with fg, it terminates quietly. (I checked this with Activity Monitor)
fg
fg
ftp
bash-3.2$
fg
fg
bash: fg: current: no such job
bash-3.2$
I think it needs some more infrastructure (which completes pseudo terminal) to switch control to child process. What's required to do this?
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我终于可以通过创建一个 pty 设备来做到这一点。要使程序表现得像“终端”，它必须在交互式终端中执行，而这需要伪终端设备。
不幸的是，据我所知，
NSTask不支持任何pty功能，所以我不得不深入到 BSD 层。这是我当前的实现： https://github.com/eonil/PseudoTeletypewriter.Swift
sudo 工作良好，我相信 ssh 也应该工作。I could finally do this by creating a
ptydevice. To make a program behave like "Terminal", it must be executed in an interactive terminal, and that needs pseudo-terminal device.Unfortunately, AFAIK,
NSTaskdoes not support anyptyability, so I had to get down to BSD layer.Here's my current implementation: https://github.com/eonil/PseudoTeletypewriter.Swift
sudois working well, and I believesshshould also work.查看 MFTask 和 PseudoTTY.app 的源代码（适用于 Mac OS X 10.6）。
：http://www.cocoadev.com/index.pl?NSTask
请参阅 pty 命令行工具请参阅此处。
Have a look at the source code of MFTask and PseudoTTY.app (which works on Mac OS X 10.6).
See: http://www.cocoadev.com/index.pl?NSTask
For a pty command line tool see here.