如何从Bash中的返回码编号中提取位

发布时间：2020-12-15 22:17:21 所属栏目：安全来源：网络整理

导读：我正在使用pylint实用程序返回此错误代码： Pylint should leave with following status code:* 0 if everything went fine* 1 if a fatal message was issued* 2 if an error message was issued* 4 if a warning message was issued* 8 if a refactor mess

我正在使用pylint实用程序返回此错误代码：

Pylint should leave with following status code:

* 0 if everything went fine
* 1 if a fatal message was issued
* 2 if an error message was issued
* 4 if a warning message was issued
* 8 if a refactor message was issued
* 16 if a convention message was issued
* 32 on usage error

status 1 to 16 will be bit-ORed so you can know which different
categories has been issued by analysing pylint output status code

现在我需要确定Bash中是否发生了致命或错误消息.怎么做？我想我需要点操作;-)

编辑：我知道我需要按位和第三(3)进行测试并测试null以查看是否发出了致命消息或错误消息.我的问题很简单：用bash语法来做.输入是$?,ouptut又是$？ (例如使用测试程序).谢谢！

解决方法

在Bash中你可以使用双括号：

#fatal error
errorcode=7
(( res = errorcode & 3 ))
[[ $res != 0 ]] && echo "Fatal Error"

（编辑：李大同）

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