# stty

修改终端命令行的相关设置

## 补充说明

**stty命令** 修改终端命令行的相关设置。

### 语法

```
stty(选项)(参数)
```

### 选项

```
-a：以容易阅读的方式打印当前的所有配置；
-g：以stty可读方式打印当前的所有配置。
```

### 参数

终端设置：指定终端命令行的设置选项。

### 实例

**在命令行下，禁止输出大写的方法：**

```
stty iuclc     #开启
stty -iuclc    #恢复
```

**在命令行下禁止输出小写：**

```
stty olcuc    #开启
stty -olcuc   #恢复
```

**打印出终端的行数和列数：**

```
stty size
```

**改变Ctrl+D的方法:**

```
stty eof "string"
```

系统默认是Ctrl+D来表示文件的结束，而通过这种方法，可以改变！

**屏蔽显示：**

```
stty -echo   #禁止回显
stty echo    #打开回显
```

测试方法:

```
stty -echo;read;stty echo;read
```

**忽略回车符：**

```
stty igncr     #开启
stty -igncr    #恢复
```

**定时输入：**

```
timeout_read()
{
    timeout=$1
    old_stty_settings=`stty -g`　　#save current settings
    stty -icanon min 0 time 100　　#set 10seconds,not 100seconds
    eval read varname　　          #=read $varname
    stty "$old_stty_settings"　　  #recover settings
}
```

更简单的方法就是利用read命令的`-t`选项：

```
read -t 10 varname
```


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