中断'read -s'后隐藏终端输入

Question

在等待来自操作的输入时按Ctrl-C read -sp会将操作返回到命令行,但是给定的输入会被隐藏,就像它仍在运行一样read -s.

例

#!/bin/sh

sig_handler() {
  echo "SIGINT received"
  exit 1
}

trap "sig_handler" SIGINT
read -sp "ENTER PASSWORD: " password
echo
echo $password

通常执行如下:

$~ ./example.sh
ENTER PASSWORD:
password
$~ text
-bash: text: command not found

但是如果你在ENTER PASSWORD按Ctrl-C就可以了

$~ ./example.sh
ENTER PASSWORD: SIGINT received
$~ -bash: text: command not found

在您刷新之前,文本或任何其他后续命令不会显示为输入reset.

收到SIGINT后如何将文本返回正常输入？read -p "ENTER PASSWORD: " password出于明显的安全原因,不需要.

Answer 1

添加stty sane到您的信号处理程序，以便它将终端恢复到默认状态：

sig_handler() {
  echo "SIGINT received"
  stty sane
  exit 1
}