Unix 如何关闭终端中的回声？

我正在编写一个Bourne shell脚本，密码输入如下：

echo -n 'Password: '
read password

---

显然，我不希望密码被回显到终端，所以我想在读取期间关闭回显。我知道有办法用

stty

做到这一点，但为了社区的利益，我会在阅读手册时问这个问题

read-s password

适用于我的linux机器。

Bourne Shell脚本：

#!/bin/sh

# Prompt user for Password
echo -n 'Password: '

# Do not show what is being typed in console by user
stty -echo

# Get input from user and assign input to variable password
read password

# Show what is being typed in console
stty echo

@:/dir #man stty

 STTY(1)              stty 5.2.1 (March 2004)              STTY(1)

     NAME
          stty - change and print terminal line settings

     SYNOPSIS
          stty [-F DEVICE] [--file=DEVICE] [SETTING]...
          stty [-F DEVICE] [--file=DEVICE] [-a|--all]
          stty [-F DEVICE] [--file=DEVICE] [-g|--save]

     DESCRIPTION
          Print or change terminal characteristics.

          -a, --all
               print all current settings in human-readable form

          -g, --save
               print all current settings in a stty-readable form

          -F, --file=DEVICE
               open and use the specified DEVICE instead of stdin

          --help
               display this help and exit

          --version
               output version information and exit

          Optional - before SETTING indicates negation.  An * marks
          non-POSIX settings.  The underlying system defines which
          settings are available.



   Local settings:

          [-]echo
               echo input characters

stty手动命令了解更多信息：

#!/bin/sh

# Prompt user for Password
echo -n 'Password: '

# Do not show what is being typed in console by user
stty -echo

# Get input from user and assign input to variable password
read password

# Show what is being typed in console
stty echo

@:/dir #man stty

 STTY(1)              stty 5.2.1 (March 2004)              STTY(1)

     NAME
          stty - change and print terminal line settings

     SYNOPSIS
          stty [-F DEVICE] [--file=DEVICE] [SETTING]...
          stty [-F DEVICE] [--file=DEVICE] [-a|--all]
          stty [-F DEVICE] [--file=DEVICE] [-g|--save]

     DESCRIPTION
          Print or change terminal characteristics.

          -a, --all
               print all current settings in human-readable form

          -g, --save
               print all current settings in a stty-readable form

          -F, --file=DEVICE
               open and use the specified DEVICE instead of stdin

          --help
               display this help and exit

          --version
               output version information and exit

          Optional - before SETTING indicates negation.  An * marks
          non-POSIX settings.  The underlying system defines which
          settings are available.



   Local settings:

          [-]echo
               echo input characters

stty手册片段：

#!/bin/sh

# Prompt user for Password
echo -n 'Password: '

# Do not show what is being typed in console by user
stty -echo

# Get input from user and assign input to variable password
read password

# Show what is being typed in console
stty echo

@:/dir #man stty

 STTY(1)              stty 5.2.1 (March 2004)              STTY(1)

     NAME
          stty - change and print terminal line settings

     SYNOPSIS
          stty [-F DEVICE] [--file=DEVICE] [SETTING]...
          stty [-F DEVICE] [--file=DEVICE] [-a|--all]
          stty [-F DEVICE] [--file=DEVICE] [-g|--save]

     DESCRIPTION
          Print or change terminal characteristics.

          -a, --all
               print all current settings in human-readable form

          -g, --save
               print all current settings in a stty-readable form

          -F, --file=DEVICE
               open and use the specified DEVICE instead of stdin

          --help
               display this help and exit

          --version
               output version information and exit

          Optional - before SETTING indicates negation.  An * marks
          non-POSIX settings.  The underlying system defines which
          settings are available.



   Local settings:

          [-]echo
               echo input characters

---

您可以使用read命令的-s选项隐藏用户输入

echo -n "Password:"
read -s password
if [ $password != "..." ]
then
        exit 1; # exit as password mismatched #
fi

如果您想从终端隐藏打印，也可以使用“stty-echo”。并使用“stty echo”恢复终端设置

---

但是我认为从用户那里获取密码输入“read-s password”已经足够了。

如果内存可用的话，这肯定是我以前做过的。出于好奇，这和stty-echo有什么不同吗；读福；stty echo？是的，如果echo已经关闭，它会在之后关闭。@ak2:谢谢，这很有道理。我是unix新手。当您刚接触unix@AbhishekGupta:1时，您能解释一下stty到底是什么以及这段代码做了什么更一般，比Wikipedia更好。了解如何滚动、搜索和退出

less

（或

more

）。2.

man whateveryouwonderabout

或者，对于bash内置命令，如“set”，“help set”。祝你旅途好运；-）这是有用的信息，但-s似乎是一个Bash扩展，因为

read-sfoo

在Dash（Ubuntu符号链接到

/bin/sh

的Bourne shell）中生成

read:1:非法选项-s

。可能是stty的重复，而不是ssty。