January 2021
Intermediate to advanced
581 pages
15h 7m
Chinese
Content preview from bash shell脚本编程经典实例 （第2版）
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448
｜
第
17
章
ssh server14
ssh server15
ssh server16
17.24.4
参考
•
man seq
•
man awk
• comp.lang.awk FAQ
17.25
模拟
DOS
的
pause
命令
17.25.1
问题
你正在迁移
DOS/Windows
批处理文件，希望能够模拟
DOS
的
pause
命令。
17.25.2
解决方案
可以在函数中使用
read -n1 -p
命令。
pause ()
{
read -n 1 -p 'Press any key when ready...'
}
-n
是
bash 2.04
引入的。如果必须省略
-n1
（说实话，你的
bash
版本太旧了，
该升级了），那么随后的提示信息需要进行修改
7
，因为只有按
Enter
键才能结束
输入。应该将命令改成：
read -p '
Press the ENTER key when ready
...'
。
17.25.3
讨论
读取完
n
个字符或一个换行符后，
-n
nchars
选项会返回。因此，
-n1
会在（等待）用户按
下任意键之后返回。
-p
选项之后的字符串参数会出现在读取输入之前。在这个例子中，该
字符串和
DOS
的
pause
命令的输出相同。
17.25.4
参考
•
help read
• 1.12
节
注
7
：
这里所说的提示信息指的是
'Press any key when ready...'
。——译者注
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.