英文:
Prevent ^C from being displayed on Ctrl+C in Go
问题
我想要在按下Ctrl+C时阻止“^C”被输出到终端。
我是这样捕获中断命令的：
c := make(chan os.Signal, 1)
signal.Notify(c, os.Interrupt)
signal.Notify(c, syscall.SIGTERM)
go func() {
<-c
// 在这里处理退出代码
}()
... 然而，当我按下Ctrl+C时，"^C"会被输出到终端。这并不理想。
英文:
I'd like to prevent "^C" from being outputted to the terminal when Ctrl+C is pressed.
I'm capturing the interrupt command like this:
c := make(chan os.Signal, 1)
signal.Notify(c, os.Interrupt)
signal.Notify(c, syscall.SIGTERM)
go func() {
<-c
// exit code here
}()
... however, when I press Ctrl+C, "^C" is outputted into the terminal. This isn't ideal.
答案1
得分: 8
如果你之后要打印一些内容，你可以这样做：
fmt.Print("\r")
log.Println("Shutting down")
\r 是一个回车字符；它告诉你的终端模拟器将光标移动到行的开头。这样你就可以覆盖终端上的 ^C。
英文:
If you print something afterwards, you can do
fmt.Print("\r")
log.Println("Shutting down")
\r is a carriage return character; it tells your terminal emulator to move the cursor at the start of the line. This way you can overwrite the ^C on the terminal.
答案2
得分: 1
如果将终端设置为原始模式，你将直接获取按键输入，终端不会解释它们（也不会显示^C）。
我不确定在Go语言中设置原始模式的最佳方法，但是golang.org/x/crypto/ssh/terminal的RawMode()函数可以实现。然后，你需要启用INT和TERM处理，否则你将接收到^C作为输入，而不是将其作为中断进行处理。
关于原始模式的解释可以在这里找到：https://unix.stackexchange.com/questions/21752/what-s-the-difference-between-a-raw-and-a-cooked-device-driver
类似的答案可以在这里找到：https://superuser.com/questions/147013/how-to-disable-c-from-being-echoed-on-linux-on-ctrl-c
英文:
If you put the terminal into raw mode, you'll get the keystrokes directly and the tty won't interpret them (and display ^C).
I'm not sure of the best way to set raw mode in Go, but golang.org/x/crypto/ssh/terminal's RawMode() does it. You would then have to enable INT and TERM handling otherwise you'll receive a ^C as input, instead having it be processed as an interruption.
An explanation of raw mode is here: https://unix.stackexchange.com/questions/21752/what-s-the-difference-between-a-raw-and-a-cooked-device-driver
A similar answer is here: https://superuser.com/questions/147013/how-to-disable-c-from-being-echoed-on-linux-on-ctrl-c
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