Is there a standard(ish) POSIX way of determining if my process (I’m writing this as a Ruby script right now; but I’m curious for multiple environments, including Node.js and ISO C command-line applications) is being run in an interactive terminal, as opposed to, say, cron, or execution from another tool, or… so on and so forth.
是否有一种标准的（ish）POSIX方式来确定我的进程（我现在正在将其写为Ruby脚本;但我对包括Node.js和ISO C命令行应用程序在内的多个环境感到好奇）正在在交互式终端中运行，而不是像cron，或从其他工具执行，或......等等。
Specifically, I need to acquire user input in certain situations, and I need to fail fatally if that is determinably not possible (i.e. being run by cron.) I can do this with an environment variable, but I’d prefer something more standard-ish, if I can.
具体来说，我需要在某些情况下获取用户输入，如果确定不可能（即由cron运行），我需要致命地失败。我可以使用环境变量做到这一点，但我更喜欢更标准的东西 - 是的，如果可以的话。
3 个解决方案
#1
15
I've always used $stdout.isatty to check for this. Other approaches might include checking the value of ENV['TERM'] or utilizing the ruby-terminfo gem.
我总是使用$ stdout.isatty来检查这个。其他方法可能包括检查ENV ['TERM']的值或使用ruby-terminfo gem。
#2
4
The closest you'll get, AFAIK, is isatty(). But as the page itself says, nothing guarantees that a human is controlling the terminal.
你得到的最接近的AFAIK是isatty（）。但正如页面本身所说，没有什么可以保证人类正在控制终端。
#3
0
As @Mitch wrote it in a comment, which can also be useful to some people:
正如@Mitch在评论中写的那样，对某些人也有用：
For anyone who came here looking for windows, try
System.Environment.UserInteractivefor .Net orGetUserObjectInformationfor win32, which will fail for non-interactive processes对于那些来这里寻找窗口的人来说，尝试使用.Net的System.Environment.UserInteractive或win32的GetUserObjectInformation，这对于非交互式进程会失败
#1
15
I've always used $stdout.isatty to check for this. Other approaches might include checking the value of ENV['TERM'] or utilizing the ruby-terminfo gem.
我总是使用$ stdout.isatty来检查这个。其他方法可能包括检查ENV ['TERM']的值或使用ruby-terminfo gem。
#2
4
The closest you'll get, AFAIK, is isatty(). But as the page itself says, nothing guarantees that a human is controlling the terminal.
你得到的最接近的AFAIK是isatty（）。但正如页面本身所说，没有什么可以保证人类正在控制终端。
#3
0
As @Mitch wrote it in a comment, which can also be useful to some people:
正如@Mitch在评论中写的那样，对某些人也有用：
For anyone who came here looking for windows, try
System.Environment.UserInteractivefor .Net orGetUserObjectInformationfor win32, which will fail for non-interactive processes对于那些来这里寻找窗口的人来说，尝试使用.Net的System.Environment.UserInteractive或win32的GetUserObjectInformation，这对于非交互式进程会失败