awk 里面只有 if 没有 else?

danoyang

aaa.log的部分文件内容

CPUSTATE   STANDBYSIDE   SBWORKSTATE
NORMAL      CPUB                WORKING


我想让awk检查我的log文件 测试 CPUSTATE 下面一行匹配 特定关键字 就输出normal 不匹配 就输出abnormal

但是翻了下我手头的资料,没有发现awk的else的介绍, man awk 后发现虽然有else,但是怎么也用不对, 请高人们指点指点



workstat = `cat aaa.log| awk '/CPUSTATE/{getline;if($1 = "NORMAL" && $2 = "CPUB" && $3 = "WORKING"print "normal" else print "abnormal" }'`

飞灰橙

print "normal";

john_student

还有问题:
判断=应该为==

danoyang

哦,我正好刚刚解决,就是把改成==了,谢谢楼上2位了

tsao

here I also need to do some operation according to the different condition in awk command line.

For example:
if ... some operation
elif... some opertaion
else... some operation

In fact I have the same issue as the above gentlemen, that is to say if the condition is ready some operation is required, otherwise the other operation is executed.

Any other suggestion or comments pls let me know.

Thanks.

ebfm

哪位大虾能说说？谢谢了！

tsao

Here I find some description about the control flow in awk statement as following:
2、流程控制语句
awk提供了完备的流程控制语句，其用法与C语言类似。下面我们一一加以说明：

if...else语句:

格式：
if(表达式)
语句1
else
语句2

格式中"语句1"可以是多个语句，如果你为了方便awk判断也方便你自已阅读，你最好将多个语句
用{}括起来。
awk分枝结构允许嵌套，其格式为
if(表达式1）
{if(表达式2）
语句1
else
语句2
}
语句3
else {if(表达式3)
语句4
else
语句5
}
语句6
当然实际操作过程中你可能不会用到如此复杂的分枝结构，这里只是为了给出其样式罢了。

here I do not do any test for the above sentences.

Good luck to you, young guys.

Thanks!

tsao

Hi all,

Here I have done some test with the if...else control flow used in awk command script and find that it can work well.

The following is the test example for you to reference:

awk '{if($2 != 2){print $0} else { if($10 == "220.192.144.129" && $3 !~/^46003/) {$NF=3; print $0} else { if($10 !~/220\.192\./) { $NF=4; print $0} else {print $0}}}}' udrinput > udroutput2